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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkfont.c,v 1.1.1.1 2001/06/13 05:00:58 dtashley Exp $ */
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/*
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* tkFont.c --
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*
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* This file maintains a database of fonts for the Tk toolkit.
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* It also provides several utility procedures for measuring and
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* displaying text.
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*
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* Copyright (c) 1990-1994 The Regents of the University of California.
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* Copyright (c) 1994-1998 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tkfont.c,v 1.1.1.1 2001/06/13 05:00:58 dtashley Exp $
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*/
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#include "tkPort.h"
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#include "tkInt.h"
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#include "tkFont.h"
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/*
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* The following structure is used to keep track of all the fonts that
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* exist in the current application. It must be stored in the
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* TkMainInfo for the application.
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*/
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typedef struct TkFontInfo {
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Tcl_HashTable fontCache; /* Map a string to an existing Tk_Font.
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* Keys are string font names, values are
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* TkFont pointers. */
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Tcl_HashTable namedTable; /* Map a name to a set of attributes for a
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* font, used when constructing a Tk_Font from
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* a named font description. Keys are
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* strings, values are NamedFont pointers. */
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TkMainInfo *mainPtr; /* Application that owns this structure. */
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int updatePending; /* Non-zero when a World Changed event has
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* already been queued to handle a change to
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* a named font. */
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} TkFontInfo;
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/*
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* The following data structure is used to keep track of the font attributes
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* for each named font that has been defined. The named font is only deleted
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* when the last reference to it goes away.
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*/
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typedef struct NamedFont {
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int refCount; /* Number of users of named font. */
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int deletePending; /* Non-zero if font should be deleted when
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* last reference goes away. */
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TkFontAttributes fa; /* Desired attributes for named font. */
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} NamedFont;
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/*
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* The following two structures are used to keep track of string
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* measurement information when using the text layout facilities.
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*
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* A LayoutChunk represents a contiguous range of text that can be measured
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* and displayed by low-level text calls. In general, chunks will be
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* delimited by newlines and tabs. Low-level, platform-specific things
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* like kerning and non-integer character widths may occur between the
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* characters in a single chunk, but not between characters in different
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* chunks.
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*
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* A TextLayout is a collection of LayoutChunks. It can be displayed with
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* respect to any origin. It is the implementation of the Tk_TextLayout
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* opaque token.
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*/
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typedef struct LayoutChunk {
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CONST char *start; /* Pointer to simple string to be displayed.
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* This is a pointer into the TkTextLayout's
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* string. */
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int numBytes; /* The number of bytes in this chunk. */
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int numChars; /* The number of characters in this chunk. */
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int numDisplayChars; /* The number of characters to display when
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* this chunk is displayed. Can be less than
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* numChars if extra space characters were
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* absorbed by the end of the chunk. This
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* will be < 0 if this is a chunk that is
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* holding a tab or newline. */
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int x, y; /* The origin of the first character in this
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* chunk with respect to the upper-left hand
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* corner of the TextLayout. */
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int totalWidth; /* Width in pixels of this chunk. Used
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* when hit testing the invisible spaces at
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* the end of a chunk. */
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int displayWidth; /* Width in pixels of the displayable
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* characters in this chunk. Can be less than
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* width if extra space characters were
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* absorbed by the end of the chunk. */
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} LayoutChunk;
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typedef struct TextLayout {
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Tk_Font tkfont; /* The font used when laying out the text. */
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CONST char *string; /* The string that was layed out. */
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int width; /* The maximum width of all lines in the
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* text layout. */
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int numChunks; /* Number of chunks actually used in
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* following array. */
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LayoutChunk chunks[1]; /* Array of chunks. The actual size will
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* be maxChunks. THIS FIELD MUST BE THE LAST
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* IN THE STRUCTURE. */
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} TextLayout;
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/*
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* The following structures are used as two-way maps between the values for
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* the fields in the TkFontAttributes structure and the strings used in
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* Tcl, when parsing both option-value format and style-list format font
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* name strings.
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*/
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static TkStateMap weightMap[] = {
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{TK_FW_NORMAL, "normal"},
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{TK_FW_BOLD, "bold"},
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{TK_FW_UNKNOWN, NULL}
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};
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static TkStateMap slantMap[] = {
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{TK_FS_ROMAN, "roman"},
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{TK_FS_ITALIC, "italic"},
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{TK_FS_UNKNOWN, NULL}
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};
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static TkStateMap underlineMap[] = {
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{1, "underline"},
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{0, NULL}
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};
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static TkStateMap overstrikeMap[] = {
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{1, "overstrike"},
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{0, NULL}
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};
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/*
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* The following structures are used when parsing XLFD's into a set of
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* TkFontAttributes.
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*/
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static TkStateMap xlfdWeightMap[] = {
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{TK_FW_NORMAL, "normal"},
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{TK_FW_NORMAL, "medium"},
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{TK_FW_NORMAL, "book"},
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{TK_FW_NORMAL, "light"},
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{TK_FW_BOLD, "bold"},
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{TK_FW_BOLD, "demi"},
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{TK_FW_BOLD, "demibold"},
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{TK_FW_NORMAL, NULL} /* Assume anything else is "normal". */
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};
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static TkStateMap xlfdSlantMap[] = {
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{TK_FS_ROMAN, "r"},
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{TK_FS_ITALIC, "i"},
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{TK_FS_OBLIQUE, "o"},
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{TK_FS_ROMAN, NULL} /* Assume anything else is "roman". */
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};
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static TkStateMap xlfdSetwidthMap[] = {
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{TK_SW_NORMAL, "normal"},
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{TK_SW_CONDENSE, "narrow"},
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{TK_SW_CONDENSE, "semicondensed"},
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{TK_SW_CONDENSE, "condensed"},
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{TK_SW_UNKNOWN, NULL}
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};
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/*
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* The following structure and defines specify the valid builtin options
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* when configuring a set of font attributes.
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*/
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static char *fontOpt[] = {
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"-family",
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"-size",
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"-weight",
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"-slant",
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"-underline",
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"-overstrike",
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NULL
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};
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#define FONT_FAMILY 0
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#define FONT_SIZE 1
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#define FONT_WEIGHT 2
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#define FONT_SLANT 3
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#define FONT_UNDERLINE 4
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#define FONT_OVERSTRIKE 5
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#define FONT_NUMFIELDS 6
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/*
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* Hardcoded font aliases. These are used to describe (mostly) identical
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* fonts whose names differ from platform to platform. If the
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* user-supplied font name matches any of the names in one of the alias
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* lists, the other names in the alias list are also automatically tried.
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*/
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static char *timesAliases[] = {
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"Times", /* Unix. */
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"Times New Roman", /* Windows. */
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"New York", /* Mac. */
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NULL
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};
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static char *helveticaAliases[] = {
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"Helvetica", /* Unix. */
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"Arial", /* Windows. */
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"Geneva", /* Mac. */
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NULL
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};
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static char *courierAliases[] = {
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"Courier", /* Unix and Mac. */
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"Courier New", /* Windows. */
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NULL
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};
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static char *minchoAliases[] = {
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"mincho", /* Unix. */
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"\357\274\255\357\274\263 \346\230\216\346\234\235",
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/* Windows (MS mincho). */
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"\346\234\254\346\230\216\346\234\235\342\210\222\357\274\255",
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/* Mac (honmincho-M). */
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NULL
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};
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static char *gothicAliases[] = {
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"gothic", /* Unix. */
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"\357\274\255\357\274\263 \343\202\264\343\202\267\343\203\203\343\202\257",
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/* Windows (MS goshikku). */
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"\344\270\270\343\202\264\343\202\267\343\203\203\343\202\257\342\210\222\357\274\255",
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/* Mac (goshikku-M). */
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NULL
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};
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static char *dingbatsAliases[] = {
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"dingbats", "zapfdingbats", "itc zapfdingbats",
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/* Unix. */
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/* Windows. */
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"zapf dingbats", /* Mac. */
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NULL
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};
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static char **fontAliases[] = {
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timesAliases,
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helveticaAliases,
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courierAliases,
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minchoAliases,
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gothicAliases,
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dingbatsAliases,
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NULL
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};
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/*
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* Hardcoded font classes. If the character cannot be found in the base
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* font, the classes are examined in order to see if some other similar
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* font should be examined also.
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*/
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static char *systemClass[] = {
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"fixed", /* Unix. */
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/* Windows. */
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"chicago", "osaka", "sistemny", /* Mac. */
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NULL
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};
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static char *serifClass[] = {
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"times", "palatino", "mincho", /* All platforms. */
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"song ti", /* Unix. */
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"ms serif", "simplified arabic", /* Windows. */
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"latinski", /* Mac. */
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NULL
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};
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static char *sansClass[] = {
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"helvetica", "gothic", /* All platforms. */
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/* Unix. */
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"ms sans serif", "traditional arabic",
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/* Windows. */
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"bastion", /* Mac. */
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NULL
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};
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static char *monoClass[] = {
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"courier", "gothic", /* All platforms. */
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"fangsong ti", /* Unix. */
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"simplified arabic fixed", /* Windows. */
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"monaco", "pryamoy", /* Mac. */
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NULL
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};
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static char *symbolClass[] = {
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"symbol", "dingbats", "wingdings", NULL
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};
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static char **fontFallbacks[] = {
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systemClass,
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serifClass,
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sansClass,
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monoClass,
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symbolClass,
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NULL
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};
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/*
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* Global fallbacks. If the character could not be found in the preferred
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* fallback list, this list is examined. If the character still cannot be
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* found, all font families in the system are examined.
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*/
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310 |
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static char *globalFontClass[] = {
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"symbol", /* All platforms. */
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/* Unix. */
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"lucida sans unicode", /* Windows. */
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"bitstream cyberbit", /* Windows popular CJK font */
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"chicago", /* Mac. */
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NULL
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};
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#define GetFontAttributes(tkfont) \
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((CONST TkFontAttributes *) &((TkFont *) (tkfont))->fa)
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#define GetFontMetrics(tkfont) \
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((CONST TkFontMetrics *) &((TkFont *) (tkfont))->fm)
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325 |
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326 |
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static int ConfigAttributesObj _ANSI_ARGS_((Tcl_Interp *interp,
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Tk_Window tkwin, int objc, Tcl_Obj *CONST objv[],
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TkFontAttributes *faPtr));
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static int CreateNamedFont _ANSI_ARGS_((Tcl_Interp *interp,
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Tk_Window tkwin, CONST char *name,
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TkFontAttributes *faPtr));
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static void DupFontObjProc _ANSI_ARGS_((Tcl_Obj *srcObjPtr,
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Tcl_Obj *dupObjPtr));
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335 |
static int FieldSpecified _ANSI_ARGS_((CONST char *field));
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static void FreeFontObjProc _ANSI_ARGS_((Tcl_Obj *objPtr));
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337 |
static int GetAttributeInfoObj _ANSI_ARGS_((Tcl_Interp *interp,
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338 |
CONST TkFontAttributes *faPtr, Tcl_Obj *objPtr));
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339 |
static LayoutChunk * NewChunk _ANSI_ARGS_((TextLayout **layoutPtrPtr,
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340 |
int *maxPtr, CONST char *start, int numChars,
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341 |
int curX, int newX, int y));
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342 |
static int ParseFontNameObj _ANSI_ARGS_((Tcl_Interp *interp,
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343 |
Tk_Window tkwin, Tcl_Obj *objPtr,
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344 |
TkFontAttributes *faPtr));
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345 |
static void RecomputeWidgets _ANSI_ARGS_((TkWindow *winPtr));
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346 |
static int SetFontFromAny _ANSI_ARGS_((Tcl_Interp *interp,
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347 |
Tcl_Obj *objPtr));
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348 |
static void TheWorldHasChanged _ANSI_ARGS_((
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349 |
ClientData clientData));
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350 |
static void UpdateDependentFonts _ANSI_ARGS_((TkFontInfo *fiPtr,
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351 |
Tk_Window tkwin, Tcl_HashEntry *namedHashPtr));
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352 |
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353 |
/*
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* The following structure defines the implementation of the "font" Tcl
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* object, used for drawing. The internalRep.twoPtrValue.ptr1 field of
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356 |
* each font object points to the TkFont structure for the font, or
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357 |
* NULL.
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358 |
*/
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359 |
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360 |
static Tcl_ObjType fontObjType = {
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361 |
"font", /* name */
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362 |
FreeFontObjProc, /* freeIntRepProc */
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363 |
DupFontObjProc, /* dupIntRepProc */
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NULL, /* updateStringProc */
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SetFontFromAny /* setFromAnyProc */
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366 |
};
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367 |
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368 |
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369 |
/*
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370 |
*---------------------------------------------------------------------------
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371 |
*
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372 |
* TkFontPkgInit --
|
373 |
*
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374 |
* This procedure is called when an application is created. It
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375 |
* initializes all the structures that are used by the font
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376 |
* package on a per application basis.
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377 |
*
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378 |
* Results:
|
379 |
* Stores a token in the mainPtr to hold information needed by this
|
380 |
* package on a per application basis.
|
381 |
*
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382 |
* Side effects:
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383 |
* Memory allocated.
|
384 |
*
|
385 |
*---------------------------------------------------------------------------
|
386 |
*/
|
387 |
void
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388 |
TkFontPkgInit(mainPtr)
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389 |
TkMainInfo *mainPtr; /* The application being created. */
|
390 |
{
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391 |
TkFontInfo *fiPtr;
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392 |
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393 |
fiPtr = (TkFontInfo *) ckalloc(sizeof(TkFontInfo));
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394 |
Tcl_InitHashTable(&fiPtr->fontCache, TCL_STRING_KEYS);
|
395 |
Tcl_InitHashTable(&fiPtr->namedTable, TCL_STRING_KEYS);
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396 |
fiPtr->mainPtr = mainPtr;
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397 |
fiPtr->updatePending = 0;
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398 |
mainPtr->fontInfoPtr = fiPtr;
|
399 |
|
400 |
TkpFontPkgInit(mainPtr);
|
401 |
}
|
402 |
|
403 |
/*
|
404 |
*---------------------------------------------------------------------------
|
405 |
*
|
406 |
* TkFontPkgFree --
|
407 |
*
|
408 |
* This procedure is called when an application is deleted. It
|
409 |
* deletes all the structures that were used by the font package
|
410 |
* for this application.
|
411 |
*
|
412 |
* Results:
|
413 |
* None.
|
414 |
*
|
415 |
* Side effects:
|
416 |
* Memory freed.
|
417 |
*
|
418 |
*---------------------------------------------------------------------------
|
419 |
*/
|
420 |
|
421 |
void
|
422 |
TkFontPkgFree(mainPtr)
|
423 |
TkMainInfo *mainPtr; /* The application being deleted. */
|
424 |
{
|
425 |
TkFontInfo *fiPtr;
|
426 |
Tcl_HashEntry *hPtr, *searchPtr;
|
427 |
Tcl_HashSearch search;
|
428 |
int fontsLeft;
|
429 |
|
430 |
fiPtr = mainPtr->fontInfoPtr;
|
431 |
|
432 |
fontsLeft = 0;
|
433 |
for (searchPtr = Tcl_FirstHashEntry(&fiPtr->fontCache, &search);
|
434 |
searchPtr != NULL;
|
435 |
searchPtr = Tcl_NextHashEntry(&search)) {
|
436 |
fontsLeft++;
|
437 |
fprintf(stderr, "Font %s still in cache.\n",
|
438 |
Tcl_GetHashKey(&fiPtr->fontCache, searchPtr));
|
439 |
}
|
440 |
if (fontsLeft) {
|
441 |
panic("TkFontPkgFree: all fonts should have been freed already");
|
442 |
}
|
443 |
Tcl_DeleteHashTable(&fiPtr->fontCache);
|
444 |
|
445 |
hPtr = Tcl_FirstHashEntry(&fiPtr->namedTable, &search);
|
446 |
while (hPtr != NULL) {
|
447 |
ckfree((char *) Tcl_GetHashValue(hPtr));
|
448 |
hPtr = Tcl_NextHashEntry(&search);
|
449 |
}
|
450 |
Tcl_DeleteHashTable(&fiPtr->namedTable);
|
451 |
if (fiPtr->updatePending != 0) {
|
452 |
Tcl_CancelIdleCall(TheWorldHasChanged, (ClientData) fiPtr);
|
453 |
}
|
454 |
ckfree((char *) fiPtr);
|
455 |
}
|
456 |
|
457 |
/*
|
458 |
*---------------------------------------------------------------------------
|
459 |
*
|
460 |
* Tk_FontObjCmd --
|
461 |
*
|
462 |
* This procedure is implemented to process the "font" Tcl command.
|
463 |
* See the user documentation for details on what it does.
|
464 |
*
|
465 |
* Results:
|
466 |
* A standard Tcl result.
|
467 |
*
|
468 |
* Side effects:
|
469 |
* See the user documentation.
|
470 |
*
|
471 |
*----------------------------------------------------------------------
|
472 |
*/
|
473 |
|
474 |
int
|
475 |
Tk_FontObjCmd(clientData, interp, objc, objv)
|
476 |
ClientData clientData; /* Main window associated with interpreter. */
|
477 |
Tcl_Interp *interp; /* Current interpreter. */
|
478 |
int objc; /* Number of arguments. */
|
479 |
Tcl_Obj *CONST objv[]; /* Argument objects. */
|
480 |
{
|
481 |
int index;
|
482 |
Tk_Window tkwin;
|
483 |
TkFontInfo *fiPtr;
|
484 |
static char *optionStrings[] = {
|
485 |
"actual", "configure", "create", "delete",
|
486 |
"families", "measure", "metrics", "names",
|
487 |
NULL
|
488 |
};
|
489 |
enum options {
|
490 |
FONT_ACTUAL, FONT_CONFIGURE, FONT_CREATE, FONT_DELETE,
|
491 |
FONT_FAMILIES, FONT_MEASURE, FONT_METRICS, FONT_NAMES
|
492 |
};
|
493 |
|
494 |
tkwin = (Tk_Window) clientData;
|
495 |
fiPtr = ((TkWindow *) tkwin)->mainPtr->fontInfoPtr;
|
496 |
|
497 |
if (objc < 2) {
|
498 |
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg?");
|
499 |
return TCL_ERROR;
|
500 |
}
|
501 |
if (Tcl_GetIndexFromObj(interp, objv[1], optionStrings, "option", 0,
|
502 |
&index) != TCL_OK) {
|
503 |
return TCL_ERROR;
|
504 |
}
|
505 |
|
506 |
switch ((enum options) index) {
|
507 |
case FONT_ACTUAL: {
|
508 |
int skip, result;
|
509 |
Tk_Font tkfont;
|
510 |
Tcl_Obj *objPtr;
|
511 |
CONST TkFontAttributes *faPtr;
|
512 |
|
513 |
skip = TkGetDisplayOf(interp, objc - 3, objv + 3, &tkwin);
|
514 |
if (skip < 0) {
|
515 |
return TCL_ERROR;
|
516 |
}
|
517 |
if ((objc < 3) || (objc - skip > 4)) {
|
518 |
Tcl_WrongNumArgs(interp, 2, objv,
|
519 |
"font ?-displayof window? ?option?");
|
520 |
return TCL_ERROR;
|
521 |
}
|
522 |
tkfont = Tk_AllocFontFromObj(interp, tkwin, objv[2]);
|
523 |
if (tkfont == NULL) {
|
524 |
return TCL_ERROR;
|
525 |
}
|
526 |
objc -= skip;
|
527 |
objv += skip;
|
528 |
faPtr = GetFontAttributes(tkfont);
|
529 |
objPtr = NULL;
|
530 |
if (objc > 3) {
|
531 |
objPtr = objv[3];
|
532 |
}
|
533 |
result = GetAttributeInfoObj(interp, faPtr, objPtr);
|
534 |
Tk_FreeFont(tkfont);
|
535 |
return result;
|
536 |
}
|
537 |
case FONT_CONFIGURE: {
|
538 |
int result;
|
539 |
char *string;
|
540 |
Tcl_Obj *objPtr;
|
541 |
NamedFont *nfPtr;
|
542 |
Tcl_HashEntry *namedHashPtr;
|
543 |
|
544 |
if (objc < 3) {
|
545 |
Tcl_WrongNumArgs(interp, 2, objv, "fontname ?options?");
|
546 |
return TCL_ERROR;
|
547 |
}
|
548 |
string = Tcl_GetString(objv[2]);
|
549 |
namedHashPtr = Tcl_FindHashEntry(&fiPtr->namedTable, string);
|
550 |
nfPtr = NULL; /* lint. */
|
551 |
if (namedHashPtr != NULL) {
|
552 |
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
|
553 |
}
|
554 |
if ((namedHashPtr == NULL) || (nfPtr->deletePending != 0)) {
|
555 |
Tcl_AppendResult(interp, "named font \"", string,
|
556 |
"\" doesn't exist", NULL);
|
557 |
return TCL_ERROR;
|
558 |
}
|
559 |
if (objc == 3) {
|
560 |
objPtr = NULL;
|
561 |
} else if (objc == 4) {
|
562 |
objPtr = objv[3];
|
563 |
} else {
|
564 |
result = ConfigAttributesObj(interp, tkwin, objc - 3,
|
565 |
objv + 3, &nfPtr->fa);
|
566 |
UpdateDependentFonts(fiPtr, tkwin, namedHashPtr);
|
567 |
return result;
|
568 |
}
|
569 |
return GetAttributeInfoObj(interp, &nfPtr->fa, objPtr);
|
570 |
}
|
571 |
case FONT_CREATE: {
|
572 |
int skip, i;
|
573 |
char *name;
|
574 |
char buf[16 + TCL_INTEGER_SPACE];
|
575 |
TkFontAttributes fa;
|
576 |
Tcl_HashEntry *namedHashPtr;
|
577 |
|
578 |
skip = 3;
|
579 |
if (objc < 3) {
|
580 |
name = NULL;
|
581 |
} else {
|
582 |
name = Tcl_GetString(objv[2]);
|
583 |
if (name[0] == '-') {
|
584 |
name = NULL;
|
585 |
}
|
586 |
}
|
587 |
if (name == NULL) {
|
588 |
/*
|
589 |
* No font name specified. Generate one of the form "fontX".
|
590 |
*/
|
591 |
|
592 |
for (i = 1; ; i++) {
|
593 |
sprintf(buf, "font%d", i);
|
594 |
namedHashPtr = Tcl_FindHashEntry(&fiPtr->namedTable, buf);
|
595 |
if (namedHashPtr == NULL) {
|
596 |
break;
|
597 |
}
|
598 |
}
|
599 |
name = buf;
|
600 |
skip = 2;
|
601 |
}
|
602 |
TkInitFontAttributes(&fa);
|
603 |
if (ConfigAttributesObj(interp, tkwin, objc - skip, objv + skip,
|
604 |
&fa) != TCL_OK) {
|
605 |
return TCL_ERROR;
|
606 |
}
|
607 |
if (CreateNamedFont(interp, tkwin, name, &fa) != TCL_OK) {
|
608 |
return TCL_ERROR;
|
609 |
}
|
610 |
Tcl_AppendResult(interp, name, NULL);
|
611 |
break;
|
612 |
}
|
613 |
case FONT_DELETE: {
|
614 |
int i;
|
615 |
char *string;
|
616 |
NamedFont *nfPtr;
|
617 |
Tcl_HashEntry *namedHashPtr;
|
618 |
|
619 |
/*
|
620 |
* Delete the named font. If there are still widgets using this
|
621 |
* font, then it isn't deleted right away.
|
622 |
*/
|
623 |
|
624 |
if (objc < 3) {
|
625 |
Tcl_WrongNumArgs(interp, 2, objv, "fontname ?fontname ...?");
|
626 |
return TCL_ERROR;
|
627 |
}
|
628 |
for (i = 2; i < objc; i++) {
|
629 |
string = Tcl_GetString(objv[i]);
|
630 |
namedHashPtr = Tcl_FindHashEntry(&fiPtr->namedTable, string);
|
631 |
if (namedHashPtr == NULL) {
|
632 |
Tcl_AppendResult(interp, "named font \"", string,
|
633 |
"\" doesn't exist", (char *) NULL);
|
634 |
return TCL_ERROR;
|
635 |
}
|
636 |
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
|
637 |
if (nfPtr->refCount != 0) {
|
638 |
nfPtr->deletePending = 1;
|
639 |
} else {
|
640 |
Tcl_DeleteHashEntry(namedHashPtr);
|
641 |
ckfree((char *) nfPtr);
|
642 |
}
|
643 |
}
|
644 |
break;
|
645 |
}
|
646 |
case FONT_FAMILIES: {
|
647 |
int skip;
|
648 |
|
649 |
skip = TkGetDisplayOf(interp, objc - 2, objv + 2, &tkwin);
|
650 |
if (skip < 0) {
|
651 |
return TCL_ERROR;
|
652 |
}
|
653 |
if (objc - skip != 2) {
|
654 |
Tcl_WrongNumArgs(interp, 2, objv, "?-displayof window?");
|
655 |
return TCL_ERROR;
|
656 |
}
|
657 |
TkpGetFontFamilies(interp, tkwin);
|
658 |
break;
|
659 |
}
|
660 |
case FONT_MEASURE: {
|
661 |
char *string;
|
662 |
Tk_Font tkfont;
|
663 |
int length, skip;
|
664 |
Tcl_Obj *resultPtr;
|
665 |
|
666 |
skip = TkGetDisplayOf(interp, objc - 3, objv + 3, &tkwin);
|
667 |
if (skip < 0) {
|
668 |
return TCL_ERROR;
|
669 |
}
|
670 |
if (objc - skip != 4) {
|
671 |
Tcl_WrongNumArgs(interp, 2, objv,
|
672 |
"font ?-displayof window? text");
|
673 |
return TCL_ERROR;
|
674 |
}
|
675 |
tkfont = Tk_AllocFontFromObj(interp, tkwin, objv[2]);
|
676 |
if (tkfont == NULL) {
|
677 |
return TCL_ERROR;
|
678 |
}
|
679 |
string = Tcl_GetStringFromObj(objv[3 + skip], &length);
|
680 |
resultPtr = Tcl_GetObjResult(interp);
|
681 |
Tcl_SetIntObj(resultPtr, Tk_TextWidth(tkfont, string, length));
|
682 |
Tk_FreeFont(tkfont);
|
683 |
break;
|
684 |
}
|
685 |
case FONT_METRICS: {
|
686 |
Tk_Font tkfont;
|
687 |
int skip, index, i;
|
688 |
CONST TkFontMetrics *fmPtr;
|
689 |
static char *switches[] = {
|
690 |
"-ascent", "-descent", "-linespace", "-fixed", NULL
|
691 |
};
|
692 |
|
693 |
skip = TkGetDisplayOf(interp, objc - 3, objv + 3, &tkwin);
|
694 |
if (skip < 0) {
|
695 |
return TCL_ERROR;
|
696 |
}
|
697 |
if ((objc < 3) || ((objc - skip) > 4)) {
|
698 |
Tcl_WrongNumArgs(interp, 2, objv,
|
699 |
"font ?-displayof window? ?option?");
|
700 |
return TCL_ERROR;
|
701 |
}
|
702 |
tkfont = Tk_AllocFontFromObj(interp, tkwin, objv[2]);
|
703 |
if (tkfont == NULL) {
|
704 |
return TCL_ERROR;
|
705 |
}
|
706 |
objc -= skip;
|
707 |
objv += skip;
|
708 |
fmPtr = GetFontMetrics(tkfont);
|
709 |
if (objc == 3) {
|
710 |
char buf[64 + TCL_INTEGER_SPACE * 4];
|
711 |
|
712 |
sprintf(buf, "-ascent %d -descent %d -linespace %d -fixed %d",
|
713 |
fmPtr->ascent, fmPtr->descent,
|
714 |
fmPtr->ascent + fmPtr->descent,
|
715 |
fmPtr->fixed);
|
716 |
Tcl_AppendResult(interp, buf, NULL);
|
717 |
} else {
|
718 |
if (Tcl_GetIndexFromObj(interp, objv[3], switches,
|
719 |
"metric", 0, &index) != TCL_OK) {
|
720 |
Tk_FreeFont(tkfont);
|
721 |
return TCL_ERROR;
|
722 |
}
|
723 |
i = 0; /* Needed only to prevent compiler
|
724 |
* warning. */
|
725 |
switch (index) {
|
726 |
case 0: i = fmPtr->ascent; break;
|
727 |
case 1: i = fmPtr->descent; break;
|
728 |
case 2: i = fmPtr->ascent + fmPtr->descent; break;
|
729 |
case 3: i = fmPtr->fixed; break;
|
730 |
}
|
731 |
Tcl_SetIntObj(Tcl_GetObjResult(interp), i);
|
732 |
}
|
733 |
Tk_FreeFont(tkfont);
|
734 |
break;
|
735 |
}
|
736 |
case FONT_NAMES: {
|
737 |
char *string;
|
738 |
NamedFont *nfPtr;
|
739 |
Tcl_HashSearch search;
|
740 |
Tcl_HashEntry *namedHashPtr;
|
741 |
Tcl_Obj *strPtr, *resultPtr;
|
742 |
|
743 |
if (objc != 2) {
|
744 |
Tcl_WrongNumArgs(interp, 1, objv, "names");
|
745 |
return TCL_ERROR;
|
746 |
}
|
747 |
resultPtr = Tcl_GetObjResult(interp);
|
748 |
namedHashPtr = Tcl_FirstHashEntry(&fiPtr->namedTable, &search);
|
749 |
while (namedHashPtr != NULL) {
|
750 |
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
|
751 |
if (nfPtr->deletePending == 0) {
|
752 |
string = Tcl_GetHashKey(&fiPtr->namedTable, namedHashPtr);
|
753 |
strPtr = Tcl_NewStringObj(string, -1);
|
754 |
Tcl_ListObjAppendElement(NULL, resultPtr, strPtr);
|
755 |
}
|
756 |
namedHashPtr = Tcl_NextHashEntry(&search);
|
757 |
}
|
758 |
break;
|
759 |
}
|
760 |
}
|
761 |
return TCL_OK;
|
762 |
}
|
763 |
|
764 |
/*
|
765 |
*---------------------------------------------------------------------------
|
766 |
*
|
767 |
* UpdateDependentFonts, TheWorldHasChanged, RecomputeWidgets --
|
768 |
*
|
769 |
* Called when the attributes of a named font changes. Updates all
|
770 |
* the instantiated fonts that depend on that named font and then
|
771 |
* uses the brute force approach and prepares every widget to
|
772 |
* recompute its geometry.
|
773 |
*
|
774 |
* Results:
|
775 |
* None.
|
776 |
*
|
777 |
* Side effects:
|
778 |
* Things get queued for redisplay.
|
779 |
*
|
780 |
*---------------------------------------------------------------------------
|
781 |
*/
|
782 |
|
783 |
static void
|
784 |
UpdateDependentFonts(fiPtr, tkwin, namedHashPtr)
|
785 |
TkFontInfo *fiPtr; /* Info about application's fonts. */
|
786 |
Tk_Window tkwin; /* A window in the application. */
|
787 |
Tcl_HashEntry *namedHashPtr;/* The named font that is changing. */
|
788 |
{
|
789 |
Tcl_HashEntry *cacheHashPtr;
|
790 |
Tcl_HashSearch search;
|
791 |
TkFont *fontPtr;
|
792 |
NamedFont *nfPtr;
|
793 |
|
794 |
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
|
795 |
if (nfPtr->refCount == 0) {
|
796 |
/*
|
797 |
* Well nobody's using this named font, so don't have to tell
|
798 |
* any widgets to recompute themselves.
|
799 |
*/
|
800 |
|
801 |
return;
|
802 |
}
|
803 |
|
804 |
cacheHashPtr = Tcl_FirstHashEntry(&fiPtr->fontCache, &search);
|
805 |
while (cacheHashPtr != NULL) {
|
806 |
for (fontPtr = (TkFont *) Tcl_GetHashValue(cacheHashPtr);
|
807 |
fontPtr != NULL; fontPtr = fontPtr->nextPtr) {
|
808 |
if (fontPtr->namedHashPtr == namedHashPtr) {
|
809 |
TkpGetFontFromAttributes(fontPtr, tkwin, &nfPtr->fa);
|
810 |
if (fiPtr->updatePending == 0) {
|
811 |
fiPtr->updatePending = 1;
|
812 |
Tcl_DoWhenIdle(TheWorldHasChanged, (ClientData) fiPtr);
|
813 |
}
|
814 |
}
|
815 |
}
|
816 |
cacheHashPtr = Tcl_NextHashEntry(&search);
|
817 |
}
|
818 |
}
|
819 |
|
820 |
static void
|
821 |
TheWorldHasChanged(clientData)
|
822 |
ClientData clientData; /* Info about application's fonts. */
|
823 |
{
|
824 |
TkFontInfo *fiPtr;
|
825 |
|
826 |
fiPtr = (TkFontInfo *) clientData;
|
827 |
fiPtr->updatePending = 0;
|
828 |
|
829 |
RecomputeWidgets(fiPtr->mainPtr->winPtr);
|
830 |
}
|
831 |
|
832 |
static void
|
833 |
RecomputeWidgets(winPtr)
|
834 |
TkWindow *winPtr; /* Window to which command is sent. */
|
835 |
{
|
836 |
if ((winPtr->classProcsPtr != NULL)
|
837 |
&& (winPtr->classProcsPtr->geometryProc != NULL)) {
|
838 |
(*winPtr->classProcsPtr->geometryProc)(winPtr->instanceData);
|
839 |
}
|
840 |
for (winPtr = winPtr->childList; winPtr != NULL; winPtr = winPtr->nextPtr) {
|
841 |
RecomputeWidgets(winPtr);
|
842 |
}
|
843 |
}
|
844 |
|
845 |
/*
|
846 |
*---------------------------------------------------------------------------
|
847 |
*
|
848 |
* CreateNamedFont --
|
849 |
*
|
850 |
* Create the specified named font with the given attributes in the
|
851 |
* named font table associated with the interp.
|
852 |
*
|
853 |
* Results:
|
854 |
* Returns TCL_OK if the font was successfully created, or TCL_ERROR
|
855 |
* if the named font already existed. If TCL_ERROR is returned, an
|
856 |
* error message is left in the interp's result.
|
857 |
*
|
858 |
* Side effects:
|
859 |
* Assume there used to exist a named font by the specified name, and
|
860 |
* that the named font had been deleted, but there were still some
|
861 |
* widgets using the named font at the time it was deleted. If a
|
862 |
* new named font is created with the same name, all those widgets
|
863 |
* that were using the old named font will be redisplayed using
|
864 |
* the new named font's attributes.
|
865 |
*
|
866 |
*---------------------------------------------------------------------------
|
867 |
*/
|
868 |
|
869 |
static int
|
870 |
CreateNamedFont(interp, tkwin, name, faPtr)
|
871 |
Tcl_Interp *interp; /* Interp for error return. */
|
872 |
Tk_Window tkwin; /* A window associated with interp. */
|
873 |
CONST char *name; /* Name for the new named font. */
|
874 |
TkFontAttributes *faPtr; /* Attributes for the new named font. */
|
875 |
{
|
876 |
TkFontInfo *fiPtr;
|
877 |
Tcl_HashEntry *namedHashPtr;
|
878 |
int new;
|
879 |
NamedFont *nfPtr;
|
880 |
|
881 |
fiPtr = ((TkWindow *) tkwin)->mainPtr->fontInfoPtr;
|
882 |
|
883 |
namedHashPtr = Tcl_CreateHashEntry(&fiPtr->namedTable, name, &new);
|
884 |
|
885 |
if (new == 0) {
|
886 |
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
|
887 |
if (nfPtr->deletePending == 0) {
|
888 |
Tcl_ResetResult(interp);
|
889 |
Tcl_AppendResult(interp, "named font \"", name,
|
890 |
"\" already exists", (char *) NULL);
|
891 |
return TCL_ERROR;
|
892 |
}
|
893 |
|
894 |
/*
|
895 |
* Recreating a named font with the same name as a previous
|
896 |
* named font. Some widgets were still using that named
|
897 |
* font, so they need to get redisplayed.
|
898 |
*/
|
899 |
|
900 |
nfPtr->fa = *faPtr;
|
901 |
nfPtr->deletePending = 0;
|
902 |
UpdateDependentFonts(fiPtr, tkwin, namedHashPtr);
|
903 |
return TCL_OK;
|
904 |
}
|
905 |
|
906 |
nfPtr = (NamedFont *) ckalloc(sizeof(NamedFont));
|
907 |
nfPtr->deletePending = 0;
|
908 |
Tcl_SetHashValue(namedHashPtr, nfPtr);
|
909 |
nfPtr->fa = *faPtr;
|
910 |
nfPtr->refCount = 0;
|
911 |
nfPtr->deletePending = 0;
|
912 |
return TCL_OK;
|
913 |
}
|
914 |
|
915 |
/*
|
916 |
*---------------------------------------------------------------------------
|
917 |
*
|
918 |
* Tk_GetFont --
|
919 |
*
|
920 |
* Given a string description of a font, map the description to a
|
921 |
* corresponding Tk_Font that represents the font.
|
922 |
*
|
923 |
* Results:
|
924 |
* The return value is token for the font, or NULL if an error
|
925 |
* prevented the font from being created. If NULL is returned, an
|
926 |
* error message will be left in the interp's result.
|
927 |
*
|
928 |
* Side effects:
|
929 |
* The font is added to an internal database with a reference
|
930 |
* count. For each call to this procedure, there should eventually
|
931 |
* be a call to Tk_FreeFont() or Tk_FreeFontFromObj() so that the
|
932 |
* database is cleaned up when fonts aren't in use anymore.
|
933 |
*
|
934 |
*---------------------------------------------------------------------------
|
935 |
*/
|
936 |
|
937 |
Tk_Font
|
938 |
Tk_GetFont(interp, tkwin, string)
|
939 |
Tcl_Interp *interp; /* Interp for database and error return. */
|
940 |
Tk_Window tkwin; /* For display on which font will be used. */
|
941 |
CONST char *string; /* String describing font, as: named font,
|
942 |
* native format, or parseable string. */
|
943 |
{
|
944 |
Tk_Font tkfont;
|
945 |
Tcl_Obj *strPtr;
|
946 |
|
947 |
strPtr = Tcl_NewStringObj((char *) string, -1);
|
948 |
Tcl_IncrRefCount(strPtr);
|
949 |
tkfont = Tk_AllocFontFromObj(interp, tkwin, strPtr);
|
950 |
Tcl_DecrRefCount(strPtr);
|
951 |
return tkfont;
|
952 |
}
|
953 |
|
954 |
/*
|
955 |
*---------------------------------------------------------------------------
|
956 |
*
|
957 |
* Tk_AllocFontFromObj --
|
958 |
*
|
959 |
* Given a string description of a font, map the description to a
|
960 |
* corresponding Tk_Font that represents the font.
|
961 |
*
|
962 |
* Results:
|
963 |
* The return value is token for the font, or NULL if an error
|
964 |
* prevented the font from being created. If NULL is returned, an
|
965 |
* error message will be left in interp's result object.
|
966 |
*
|
967 |
* Side effects:
|
968 |
* The font is added to an internal database with a reference
|
969 |
* count. For each call to this procedure, there should eventually
|
970 |
* be a call to Tk_FreeFont() or Tk_FreeFontFromObj() so that the
|
971 |
* database is cleaned up when fonts aren't in use anymore.
|
972 |
*
|
973 |
*---------------------------------------------------------------------------
|
974 |
*/
|
975 |
|
976 |
Tk_Font
|
977 |
Tk_AllocFontFromObj(interp, tkwin, objPtr)
|
978 |
Tcl_Interp *interp; /* Interp for database and error return. */
|
979 |
Tk_Window tkwin; /* For screen on which font will be used. */
|
980 |
Tcl_Obj *objPtr; /* Object describing font, as: named font,
|
981 |
* native format, or parseable string. */
|
982 |
{
|
983 |
TkFontInfo *fiPtr;
|
984 |
Tcl_HashEntry *cacheHashPtr, *namedHashPtr;
|
985 |
TkFont *fontPtr, *firstFontPtr, *oldFontPtr;
|
986 |
int new, descent;
|
987 |
NamedFont *nfPtr;
|
988 |
|
989 |
fiPtr = ((TkWindow *) tkwin)->mainPtr->fontInfoPtr;
|
990 |
if (objPtr->typePtr != &fontObjType) {
|
991 |
SetFontFromAny(interp, objPtr);
|
992 |
}
|
993 |
|
994 |
oldFontPtr = (TkFont *) objPtr->internalRep.twoPtrValue.ptr1;
|
995 |
|
996 |
if (oldFontPtr != NULL) {
|
997 |
if (oldFontPtr->resourceRefCount == 0) {
|
998 |
/*
|
999 |
* This is a stale reference: it refers to a TkFont that's
|
1000 |
* no longer in use. Clear the reference.
|
1001 |
*/
|
1002 |
|
1003 |
FreeFontObjProc(objPtr);
|
1004 |
oldFontPtr = NULL;
|
1005 |
} else if (Tk_Screen(tkwin) == oldFontPtr->screen) {
|
1006 |
oldFontPtr->resourceRefCount++;
|
1007 |
return (Tk_Font) oldFontPtr;
|
1008 |
}
|
1009 |
}
|
1010 |
|
1011 |
/*
|
1012 |
* Next, search the list of fonts that have the name we want, to see
|
1013 |
* if one of them is for the right screen.
|
1014 |
*/
|
1015 |
|
1016 |
new = 0;
|
1017 |
if (oldFontPtr != NULL) {
|
1018 |
cacheHashPtr = oldFontPtr->cacheHashPtr;
|
1019 |
FreeFontObjProc(objPtr);
|
1020 |
} else {
|
1021 |
cacheHashPtr = Tcl_CreateHashEntry(&fiPtr->fontCache,
|
1022 |
Tcl_GetString(objPtr), &new);
|
1023 |
}
|
1024 |
firstFontPtr = (TkFont *) Tcl_GetHashValue(cacheHashPtr);
|
1025 |
for (fontPtr = firstFontPtr; (fontPtr != NULL);
|
1026 |
fontPtr = fontPtr->nextPtr) {
|
1027 |
if (Tk_Screen(tkwin) == fontPtr->screen) {
|
1028 |
fontPtr->resourceRefCount++;
|
1029 |
fontPtr->objRefCount++;
|
1030 |
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) fontPtr;
|
1031 |
return (Tk_Font) fontPtr;
|
1032 |
}
|
1033 |
}
|
1034 |
|
1035 |
/*
|
1036 |
* The desired font isn't in the table. Make a new one.
|
1037 |
*/
|
1038 |
|
1039 |
namedHashPtr = Tcl_FindHashEntry(&fiPtr->namedTable,
|
1040 |
Tcl_GetString(objPtr));
|
1041 |
if (namedHashPtr != NULL) {
|
1042 |
/*
|
1043 |
* Construct a font based on a named font.
|
1044 |
*/
|
1045 |
|
1046 |
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
|
1047 |
nfPtr->refCount++;
|
1048 |
|
1049 |
fontPtr = TkpGetFontFromAttributes(NULL, tkwin, &nfPtr->fa);
|
1050 |
} else {
|
1051 |
/*
|
1052 |
* Native font?
|
1053 |
*/
|
1054 |
|
1055 |
fontPtr = TkpGetNativeFont(tkwin, Tcl_GetString(objPtr));
|
1056 |
if (fontPtr == NULL) {
|
1057 |
TkFontAttributes fa;
|
1058 |
Tcl_Obj *dupObjPtr = Tcl_DuplicateObj(objPtr);
|
1059 |
|
1060 |
if (ParseFontNameObj(interp, tkwin, dupObjPtr, &fa) != TCL_OK) {
|
1061 |
if (new) {
|
1062 |
Tcl_DeleteHashEntry(cacheHashPtr);
|
1063 |
}
|
1064 |
Tcl_DecrRefCount(dupObjPtr);
|
1065 |
return NULL;
|
1066 |
}
|
1067 |
Tcl_DecrRefCount(dupObjPtr);
|
1068 |
|
1069 |
/*
|
1070 |
* String contained the attributes inline.
|
1071 |
*/
|
1072 |
|
1073 |
fontPtr = TkpGetFontFromAttributes(NULL, tkwin, &fa);
|
1074 |
}
|
1075 |
}
|
1076 |
|
1077 |
fontPtr->resourceRefCount = 1;
|
1078 |
fontPtr->objRefCount = 1;
|
1079 |
fontPtr->cacheHashPtr = cacheHashPtr;
|
1080 |
fontPtr->namedHashPtr = namedHashPtr;
|
1081 |
fontPtr->screen = Tk_Screen(tkwin);
|
1082 |
fontPtr->nextPtr = firstFontPtr;
|
1083 |
Tcl_SetHashValue(cacheHashPtr, fontPtr);
|
1084 |
|
1085 |
Tk_MeasureChars((Tk_Font) fontPtr, "0", 1, -1, 0, &fontPtr->tabWidth);
|
1086 |
if (fontPtr->tabWidth == 0) {
|
1087 |
fontPtr->tabWidth = fontPtr->fm.maxWidth;
|
1088 |
}
|
1089 |
fontPtr->tabWidth *= 8;
|
1090 |
|
1091 |
/*
|
1092 |
* Make sure the tab width isn't zero (some fonts may not have enough
|
1093 |
* information to set a reasonable tab width).
|
1094 |
*/
|
1095 |
|
1096 |
if (fontPtr->tabWidth == 0) {
|
1097 |
fontPtr->tabWidth = 1;
|
1098 |
}
|
1099 |
|
1100 |
/*
|
1101 |
* Get information used for drawing underlines in generic code on a
|
1102 |
* non-underlined font.
|
1103 |
*/
|
1104 |
|
1105 |
descent = fontPtr->fm.descent;
|
1106 |
fontPtr->underlinePos = descent / 2;
|
1107 |
fontPtr->underlineHeight = TkFontGetPixels(tkwin, fontPtr->fa.size) / 10;
|
1108 |
if (fontPtr->underlineHeight == 0) {
|
1109 |
fontPtr->underlineHeight = 1;
|
1110 |
}
|
1111 |
if (fontPtr->underlinePos + fontPtr->underlineHeight > descent) {
|
1112 |
/*
|
1113 |
* If this set of values would cause the bottom of the underline
|
1114 |
* bar to stick below the descent of the font, jack the underline
|
1115 |
* up a bit higher.
|
1116 |
*/
|
1117 |
|
1118 |
fontPtr->underlineHeight = descent - fontPtr->underlinePos;
|
1119 |
if (fontPtr->underlineHeight == 0) {
|
1120 |
fontPtr->underlinePos--;
|
1121 |
fontPtr->underlineHeight = 1;
|
1122 |
}
|
1123 |
}
|
1124 |
|
1125 |
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) fontPtr;
|
1126 |
return (Tk_Font) fontPtr;
|
1127 |
}
|
1128 |
|
1129 |
/*
|
1130 |
*----------------------------------------------------------------------
|
1131 |
*
|
1132 |
* Tk_GetFontFromObj --
|
1133 |
*
|
1134 |
* Find the font that corresponds to a given object. The font must
|
1135 |
* have already been created by Tk_GetFont or Tk_AllocFontFromObj.
|
1136 |
*
|
1137 |
* Results:
|
1138 |
* The return value is a token for the font that matches objPtr
|
1139 |
* and is suitable for use in tkwin.
|
1140 |
*
|
1141 |
* Side effects:
|
1142 |
* If the object is not already a font ref, the conversion will free
|
1143 |
* any old internal representation.
|
1144 |
*
|
1145 |
*----------------------------------------------------------------------
|
1146 |
*/
|
1147 |
|
1148 |
Tk_Font
|
1149 |
Tk_GetFontFromObj(tkwin, objPtr)
|
1150 |
Tk_Window tkwin; /* The window that the font will be used in. */
|
1151 |
Tcl_Obj *objPtr; /* The object from which to get the font. */
|
1152 |
{
|
1153 |
TkFontInfo *fiPtr = ((TkWindow *) tkwin)->mainPtr->fontInfoPtr;
|
1154 |
TkFont *fontPtr;
|
1155 |
Tcl_HashEntry *hashPtr;
|
1156 |
|
1157 |
if (objPtr->typePtr != &fontObjType) {
|
1158 |
SetFontFromAny((Tcl_Interp *) NULL, objPtr);
|
1159 |
}
|
1160 |
|
1161 |
fontPtr = (TkFont *) objPtr->internalRep.twoPtrValue.ptr1;
|
1162 |
|
1163 |
if (fontPtr != NULL) {
|
1164 |
if (fontPtr->resourceRefCount == 0) {
|
1165 |
/*
|
1166 |
* This is a stale reference: it refers to a TkFont that's
|
1167 |
* no longer in use. Clear the reference.
|
1168 |
*/
|
1169 |
|
1170 |
FreeFontObjProc(objPtr);
|
1171 |
fontPtr = NULL;
|
1172 |
} else if (Tk_Screen(tkwin) == fontPtr->screen) {
|
1173 |
return (Tk_Font) fontPtr;
|
1174 |
}
|
1175 |
}
|
1176 |
|
1177 |
/*
|
1178 |
* Next, search the list of fonts that have the name we want, to see
|
1179 |
* if one of them is for the right screen.
|
1180 |
*/
|
1181 |
|
1182 |
if (fontPtr != NULL) {
|
1183 |
hashPtr = fontPtr->cacheHashPtr;
|
1184 |
FreeFontObjProc(objPtr);
|
1185 |
} else {
|
1186 |
hashPtr = Tcl_FindHashEntry(&fiPtr->fontCache, Tcl_GetString(objPtr));
|
1187 |
}
|
1188 |
if (hashPtr != NULL) {
|
1189 |
for (fontPtr = (TkFont *) Tcl_GetHashValue(hashPtr); fontPtr != NULL;
|
1190 |
fontPtr = fontPtr->nextPtr) {
|
1191 |
if (Tk_Screen(tkwin) == fontPtr->screen) {
|
1192 |
fontPtr->objRefCount++;
|
1193 |
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) fontPtr;
|
1194 |
return (Tk_Font) fontPtr;
|
1195 |
}
|
1196 |
}
|
1197 |
}
|
1198 |
|
1199 |
panic("Tk_GetFontFromObj called with non-existent font!");
|
1200 |
return NULL;
|
1201 |
}
|
1202 |
|
1203 |
/*
|
1204 |
*----------------------------------------------------------------------
|
1205 |
*
|
1206 |
* SetFontFromAny --
|
1207 |
*
|
1208 |
* Convert the internal representation of a Tcl object to the
|
1209 |
* font internal form.
|
1210 |
*
|
1211 |
* Results:
|
1212 |
* Always returns TCL_OK.
|
1213 |
*
|
1214 |
* Side effects:
|
1215 |
* The object is left with its typePtr pointing to fontObjType.
|
1216 |
* The TkFont pointer is NULL.
|
1217 |
*
|
1218 |
*----------------------------------------------------------------------
|
1219 |
*/
|
1220 |
|
1221 |
static int
|
1222 |
SetFontFromAny(interp, objPtr)
|
1223 |
Tcl_Interp *interp; /* Used for error reporting if not NULL. */
|
1224 |
Tcl_Obj *objPtr; /* The object to convert. */
|
1225 |
{
|
1226 |
Tcl_ObjType *typePtr;
|
1227 |
|
1228 |
/*
|
1229 |
* Free the old internalRep before setting the new one.
|
1230 |
*/
|
1231 |
|
1232 |
Tcl_GetString(objPtr);
|
1233 |
typePtr = objPtr->typePtr;
|
1234 |
if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) {
|
1235 |
(*typePtr->freeIntRepProc)(objPtr);
|
1236 |
}
|
1237 |
objPtr->typePtr = &fontObjType;
|
1238 |
objPtr->internalRep.twoPtrValue.ptr1 = NULL;
|
1239 |
|
1240 |
return TCL_OK;
|
1241 |
}
|
1242 |
|
1243 |
/*
|
1244 |
*---------------------------------------------------------------------------
|
1245 |
*
|
1246 |
* Tk_NameOfFont --
|
1247 |
*
|
1248 |
* Given a font, return a textual string identifying it.
|
1249 |
*
|
1250 |
* Results:
|
1251 |
* The return value is the description that was passed to
|
1252 |
* Tk_GetFont() to create the font. The storage for the returned
|
1253 |
* string is only guaranteed to persist until the font is deleted.
|
1254 |
* The caller should not modify this string.
|
1255 |
*
|
1256 |
* Side effects:
|
1257 |
* None.
|
1258 |
*
|
1259 |
*---------------------------------------------------------------------------
|
1260 |
*/
|
1261 |
|
1262 |
char *
|
1263 |
Tk_NameOfFont(tkfont)
|
1264 |
Tk_Font tkfont; /* Font whose name is desired. */
|
1265 |
{
|
1266 |
TkFont *fontPtr;
|
1267 |
|
1268 |
fontPtr = (TkFont *) tkfont;
|
1269 |
return fontPtr->cacheHashPtr->key.string;
|
1270 |
}
|
1271 |
|
1272 |
/*
|
1273 |
*---------------------------------------------------------------------------
|
1274 |
*
|
1275 |
* Tk_FreeFont --
|
1276 |
*
|
1277 |
* Called to release a font allocated by Tk_GetFont().
|
1278 |
*
|
1279 |
* Results:
|
1280 |
* None.
|
1281 |
*
|
1282 |
* Side effects:
|
1283 |
* The reference count associated with font is decremented, and
|
1284 |
* only deallocated when no one is using it.
|
1285 |
*
|
1286 |
*---------------------------------------------------------------------------
|
1287 |
*/
|
1288 |
|
1289 |
void
|
1290 |
Tk_FreeFont(tkfont)
|
1291 |
Tk_Font tkfont; /* Font to be released. */
|
1292 |
{
|
1293 |
TkFont *fontPtr, *prevPtr;
|
1294 |
NamedFont *nfPtr;
|
1295 |
|
1296 |
if (tkfont == NULL) {
|
1297 |
return;
|
1298 |
}
|
1299 |
fontPtr = (TkFont *) tkfont;
|
1300 |
fontPtr->resourceRefCount--;
|
1301 |
if (fontPtr->resourceRefCount > 0) {
|
1302 |
return;
|
1303 |
}
|
1304 |
if (fontPtr->namedHashPtr != NULL) {
|
1305 |
/*
|
1306 |
* This font derived from a named font. Reduce the reference
|
1307 |
* count on the named font and free it if no-one else is
|
1308 |
* using it.
|
1309 |
*/
|
1310 |
|
1311 |
nfPtr = (NamedFont *) Tcl_GetHashValue(fontPtr->namedHashPtr);
|
1312 |
nfPtr->refCount--;
|
1313 |
if ((nfPtr->refCount == 0) && (nfPtr->deletePending != 0)) {
|
1314 |
Tcl_DeleteHashEntry(fontPtr->namedHashPtr);
|
1315 |
ckfree((char *) nfPtr);
|
1316 |
}
|
1317 |
}
|
1318 |
|
1319 |
prevPtr = (TkFont *) Tcl_GetHashValue(fontPtr->cacheHashPtr);
|
1320 |
if (prevPtr == fontPtr) {
|
1321 |
if (fontPtr->nextPtr == NULL) {
|
1322 |
Tcl_DeleteHashEntry(fontPtr->cacheHashPtr);
|
1323 |
} else {
|
1324 |
Tcl_SetHashValue(fontPtr->cacheHashPtr, fontPtr->nextPtr);
|
1325 |
}
|
1326 |
} else {
|
1327 |
while (prevPtr->nextPtr != fontPtr) {
|
1328 |
prevPtr = prevPtr->nextPtr;
|
1329 |
}
|
1330 |
prevPtr->nextPtr = fontPtr->nextPtr;
|
1331 |
}
|
1332 |
|
1333 |
TkpDeleteFont(fontPtr);
|
1334 |
if (fontPtr->objRefCount == 0) {
|
1335 |
ckfree((char *) fontPtr);
|
1336 |
}
|
1337 |
}
|
1338 |
|
1339 |
/*
|
1340 |
*---------------------------------------------------------------------------
|
1341 |
*
|
1342 |
* Tk_FreeFontFromObj --
|
1343 |
*
|
1344 |
* Called to release a font inside a Tcl_Obj *. Decrements the refCount
|
1345 |
* of the font and removes it from the hash tables if necessary.
|
1346 |
*
|
1347 |
* Results:
|
1348 |
* None.
|
1349 |
*
|
1350 |
* Side effects:
|
1351 |
* The reference count associated with font is decremented, and
|
1352 |
* only deallocated when no one is using it.
|
1353 |
*
|
1354 |
*---------------------------------------------------------------------------
|
1355 |
*/
|
1356 |
|
1357 |
void
|
1358 |
Tk_FreeFontFromObj(tkwin, objPtr)
|
1359 |
Tk_Window tkwin; /* The window this font lives in. Needed
|
1360 |
* for the screen value. */
|
1361 |
Tcl_Obj *objPtr; /* The Tcl_Obj * to be freed. */
|
1362 |
{
|
1363 |
Tk_FreeFont(Tk_GetFontFromObj(tkwin, objPtr));
|
1364 |
}
|
1365 |
|
1366 |
/*
|
1367 |
*---------------------------------------------------------------------------
|
1368 |
*
|
1369 |
* FreeFontObjProc --
|
1370 |
*
|
1371 |
* This proc is called to release an object reference to a font.
|
1372 |
* Called when the object's internal rep is released or when
|
1373 |
* the cached fontPtr needs to be changed.
|
1374 |
*
|
1375 |
* Results:
|
1376 |
* None.
|
1377 |
*
|
1378 |
* Side effects:
|
1379 |
* The object reference count is decremented. When both it
|
1380 |
* and the hash ref count go to zero, the font's resources
|
1381 |
* are released.
|
1382 |
*
|
1383 |
*---------------------------------------------------------------------------
|
1384 |
*/
|
1385 |
|
1386 |
static void
|
1387 |
FreeFontObjProc(objPtr)
|
1388 |
Tcl_Obj *objPtr; /* The object we are releasing. */
|
1389 |
{
|
1390 |
TkFont *fontPtr = (TkFont *) objPtr->internalRep.twoPtrValue.ptr1;
|
1391 |
|
1392 |
if (fontPtr != NULL) {
|
1393 |
fontPtr->objRefCount--;
|
1394 |
if ((fontPtr->resourceRefCount == 0) && (fontPtr->objRefCount == 0)) {
|
1395 |
ckfree((char *) fontPtr);
|
1396 |
objPtr->internalRep.twoPtrValue.ptr1 = NULL;
|
1397 |
}
|
1398 |
}
|
1399 |
}
|
1400 |
|
1401 |
/*
|
1402 |
*---------------------------------------------------------------------------
|
1403 |
*
|
1404 |
* DupFontObjProc --
|
1405 |
*
|
1406 |
* When a cached font object is duplicated, this is called to
|
1407 |
* update the internal reps.
|
1408 |
*
|
1409 |
* Results:
|
1410 |
* None.
|
1411 |
*
|
1412 |
* Side effects:
|
1413 |
* The font's objRefCount is incremented and the internal rep
|
1414 |
* of the copy is set to point to it.
|
1415 |
*
|
1416 |
*---------------------------------------------------------------------------
|
1417 |
*/
|
1418 |
|
1419 |
static void
|
1420 |
DupFontObjProc(srcObjPtr, dupObjPtr)
|
1421 |
Tcl_Obj *srcObjPtr; /* The object we are copying from. */
|
1422 |
Tcl_Obj *dupObjPtr; /* The object we are copying to. */
|
1423 |
{
|
1424 |
TkFont *fontPtr = (TkFont *) srcObjPtr->internalRep.twoPtrValue.ptr1;
|
1425 |
|
1426 |
dupObjPtr->typePtr = srcObjPtr->typePtr;
|
1427 |
dupObjPtr->internalRep.twoPtrValue.ptr1 = (VOID *) fontPtr;
|
1428 |
|
1429 |
if (fontPtr != NULL) {
|
1430 |
fontPtr->objRefCount++;
|
1431 |
}
|
1432 |
}
|
1433 |
|
1434 |
/*
|
1435 |
*---------------------------------------------------------------------------
|
1436 |
*
|
1437 |
* Tk_FontId --
|
1438 |
*
|
1439 |
* Given a font, return an opaque handle that should be selected
|
1440 |
* into the XGCValues structure in order to get the constructed
|
1441 |
* gc to use this font. This procedure would go away if the
|
1442 |
* XGCValues structure were replaced with a TkGCValues structure.
|
1443 |
*
|
1444 |
* Results:
|
1445 |
* As above.
|
1446 |
*
|
1447 |
* Side effects:
|
1448 |
* None.
|
1449 |
*
|
1450 |
*---------------------------------------------------------------------------
|
1451 |
*/
|
1452 |
|
1453 |
Font
|
1454 |
Tk_FontId(tkfont)
|
1455 |
Tk_Font tkfont; /* Font that is going to be selected into GC. */
|
1456 |
{
|
1457 |
TkFont *fontPtr;
|
1458 |
|
1459 |
fontPtr = (TkFont *) tkfont;
|
1460 |
return fontPtr->fid;
|
1461 |
}
|
1462 |
|
1463 |
/*
|
1464 |
*---------------------------------------------------------------------------
|
1465 |
*
|
1466 |
* Tk_GetFontMetrics --
|
1467 |
*
|
1468 |
* Returns overall ascent and descent metrics for the given font.
|
1469 |
* These values can be used to space multiple lines of text and
|
1470 |
* to align the baselines of text in different fonts.
|
1471 |
*
|
1472 |
* Results:
|
1473 |
* If *heightPtr is non-NULL, it is filled with the overall height
|
1474 |
* of the font, which is the sum of the ascent and descent.
|
1475 |
* If *ascentPtr or *descentPtr is non-NULL, they are filled with
|
1476 |
* the ascent and/or descent information for the font.
|
1477 |
*
|
1478 |
* Side effects:
|
1479 |
* None.
|
1480 |
*
|
1481 |
*---------------------------------------------------------------------------
|
1482 |
*/
|
1483 |
void
|
1484 |
Tk_GetFontMetrics(tkfont, fmPtr)
|
1485 |
Tk_Font tkfont; /* Font in which metrics are calculated. */
|
1486 |
Tk_FontMetrics *fmPtr; /* Pointer to structure in which font
|
1487 |
* metrics for tkfont will be stored. */
|
1488 |
{
|
1489 |
TkFont *fontPtr;
|
1490 |
|
1491 |
fontPtr = (TkFont *) tkfont;
|
1492 |
fmPtr->ascent = fontPtr->fm.ascent;
|
1493 |
fmPtr->descent = fontPtr->fm.descent;
|
1494 |
fmPtr->linespace = fontPtr->fm.ascent + fontPtr->fm.descent;
|
1495 |
}
|
1496 |
|
1497 |
/*
|
1498 |
*---------------------------------------------------------------------------
|
1499 |
*
|
1500 |
* Tk_PostscriptFontName --
|
1501 |
*
|
1502 |
* Given a Tk_Font, return the name of the corresponding Postscript
|
1503 |
* font.
|
1504 |
*
|
1505 |
* Results:
|
1506 |
* The return value is the pointsize of the given Tk_Font.
|
1507 |
* The name of the Postscript font is appended to dsPtr.
|
1508 |
*
|
1509 |
* Side effects:
|
1510 |
* If the font does not exist on the printer, the print job will
|
1511 |
* fail at print time. Given a "reasonable" Postscript printer,
|
1512 |
* the following Tk_Font font families should print correctly:
|
1513 |
*
|
1514 |
* Avant Garde, Arial, Bookman, Courier, Courier New, Geneva,
|
1515 |
* Helvetica, Monaco, New Century Schoolbook, New York,
|
1516 |
* Palatino, Symbol, Times, Times New Roman, Zapf Chancery,
|
1517 |
* and Zapf Dingbats.
|
1518 |
*
|
1519 |
* Any other Tk_Font font families may not print correctly
|
1520 |
* because the computed Postscript font name may be incorrect.
|
1521 |
*
|
1522 |
*---------------------------------------------------------------------------
|
1523 |
*/
|
1524 |
|
1525 |
int
|
1526 |
Tk_PostscriptFontName(tkfont, dsPtr)
|
1527 |
Tk_Font tkfont; /* Font in which text will be printed. */
|
1528 |
Tcl_DString *dsPtr; /* Pointer to an initialized Tcl_DString to
|
1529 |
* which the name of the Postscript font that
|
1530 |
* corresponds to tkfont will be appended. */
|
1531 |
{
|
1532 |
TkFont *fontPtr;
|
1533 |
char *family, *weightString, *slantString;
|
1534 |
char *src, *dest;
|
1535 |
int upper, len;
|
1536 |
|
1537 |
len = Tcl_DStringLength(dsPtr);
|
1538 |
fontPtr = (TkFont *) tkfont;
|
1539 |
|
1540 |
/*
|
1541 |
* Convert the case-insensitive Tk_Font family name to the
|
1542 |
* case-sensitive Postscript family name. Take out any spaces and
|
1543 |
* capitalize the first letter of each word.
|
1544 |
*/
|
1545 |
|
1546 |
family = fontPtr->fa.family;
|
1547 |
if (strncasecmp(family, "itc ", 4) == 0) {
|
1548 |
family = family + 4;
|
1549 |
}
|
1550 |
if ((strcasecmp(family, "Arial") == 0)
|
1551 |
|| (strcasecmp(family, "Geneva") == 0)) {
|
1552 |
family = "Helvetica";
|
1553 |
} else if ((strcasecmp(family, "Times New Roman") == 0)
|
1554 |
|| (strcasecmp(family, "New York") == 0)) {
|
1555 |
family = "Times";
|
1556 |
} else if ((strcasecmp(family, "Courier New") == 0)
|
1557 |
|| (strcasecmp(family, "Monaco") == 0)) {
|
1558 |
family = "Courier";
|
1559 |
} else if (strcasecmp(family, "AvantGarde") == 0) {
|
1560 |
family = "AvantGarde";
|
1561 |
} else if (strcasecmp(family, "ZapfChancery") == 0) {
|
1562 |
family = "ZapfChancery";
|
1563 |
} else if (strcasecmp(family, "ZapfDingbats") == 0) {
|
1564 |
family = "ZapfDingbats";
|
1565 |
} else {
|
1566 |
Tcl_UniChar ch;
|
1567 |
|
1568 |
/*
|
1569 |
* Inline, capitalize the first letter of each word, lowercase the
|
1570 |
* rest of the letters in each word, and then take out the spaces
|
1571 |
* between the words. This may make the DString shorter, which is
|
1572 |
* safe to do.
|
1573 |
*/
|
1574 |
|
1575 |
Tcl_DStringAppend(dsPtr, family, -1);
|
1576 |
|
1577 |
src = dest = Tcl_DStringValue(dsPtr) + len;
|
1578 |
upper = 1;
|
1579 |
for (; *src != '\0'; ) {
|
1580 |
while (isspace(UCHAR(*src))) { /* INTL: ISO space */
|
1581 |
src++;
|
1582 |
upper = 1;
|
1583 |
}
|
1584 |
src += Tcl_UtfToUniChar(src, &ch);
|
1585 |
if (upper) {
|
1586 |
ch = Tcl_UniCharToUpper(ch);
|
1587 |
upper = 0;
|
1588 |
} else {
|
1589 |
ch = Tcl_UniCharToLower(ch);
|
1590 |
}
|
1591 |
dest += Tcl_UniCharToUtf(ch, dest);
|
1592 |
}
|
1593 |
*dest = '\0';
|
1594 |
Tcl_DStringSetLength(dsPtr, dest - Tcl_DStringValue(dsPtr));
|
1595 |
family = Tcl_DStringValue(dsPtr) + len;
|
1596 |
}
|
1597 |
if (family != Tcl_DStringValue(dsPtr) + len) {
|
1598 |
Tcl_DStringAppend(dsPtr, family, -1);
|
1599 |
family = Tcl_DStringValue(dsPtr) + len;
|
1600 |
}
|
1601 |
|
1602 |
if (strcasecmp(family, "NewCenturySchoolbook") == 0) {
|
1603 |
Tcl_DStringSetLength(dsPtr, len);
|
1604 |
Tcl_DStringAppend(dsPtr, "NewCenturySchlbk", -1);
|
1605 |
family = Tcl_DStringValue(dsPtr) + len;
|
1606 |
}
|
1607 |
|
1608 |
/*
|
1609 |
* Get the string to use for the weight.
|
1610 |
*/
|
1611 |
|
1612 |
weightString = NULL;
|
1613 |
if (fontPtr->fa.weight == TK_FW_NORMAL) {
|
1614 |
if (strcmp(family, "Bookman") == 0) {
|
1615 |
weightString = "Light";
|
1616 |
} else if (strcmp(family, "AvantGarde") == 0) {
|
1617 |
weightString = "Book";
|
1618 |
} else if (strcmp(family, "ZapfChancery") == 0) {
|
1619 |
weightString = "Medium";
|
1620 |
}
|
1621 |
} else {
|
1622 |
if ((strcmp(family, "Bookman") == 0)
|
1623 |
|| (strcmp(family, "AvantGarde") == 0)) {
|
1624 |
weightString = "Demi";
|
1625 |
} else {
|
1626 |
weightString = "Bold";
|
1627 |
}
|
1628 |
}
|
1629 |
|
1630 |
/*
|
1631 |
* Get the string to use for the slant.
|
1632 |
*/
|
1633 |
|
1634 |
slantString = NULL;
|
1635 |
if (fontPtr->fa.slant == TK_FS_ROMAN) {
|
1636 |
;
|
1637 |
} else {
|
1638 |
if ((strcmp(family, "Helvetica") == 0)
|
1639 |
|| (strcmp(family, "Courier") == 0)
|
1640 |
|| (strcmp(family, "AvantGarde") == 0)) {
|
1641 |
slantString = "Oblique";
|
1642 |
} else {
|
1643 |
slantString = "Italic";
|
1644 |
}
|
1645 |
}
|
1646 |
|
1647 |
/*
|
1648 |
* The string "Roman" needs to be added to some fonts that are not bold
|
1649 |
* and not italic.
|
1650 |
*/
|
1651 |
|
1652 |
if ((slantString == NULL) && (weightString == NULL)) {
|
1653 |
if ((strcmp(family, "Times") == 0)
|
1654 |
|| (strcmp(family, "NewCenturySchlbk") == 0)
|
1655 |
|| (strcmp(family, "Palatino") == 0)) {
|
1656 |
Tcl_DStringAppend(dsPtr, "-Roman", -1);
|
1657 |
}
|
1658 |
} else {
|
1659 |
Tcl_DStringAppend(dsPtr, "-", -1);
|
1660 |
if (weightString != NULL) {
|
1661 |
Tcl_DStringAppend(dsPtr, weightString, -1);
|
1662 |
}
|
1663 |
if (slantString != NULL) {
|
1664 |
Tcl_DStringAppend(dsPtr, slantString, -1);
|
1665 |
}
|
1666 |
}
|
1667 |
|
1668 |
return fontPtr->fa.size;
|
1669 |
}
|
1670 |
|
1671 |
/*
|
1672 |
*---------------------------------------------------------------------------
|
1673 |
*
|
1674 |
* Tk_TextWidth --
|
1675 |
*
|
1676 |
* A wrapper function for the more complicated interface of
|
1677 |
* Tk_MeasureChars. Computes how much space the given
|
1678 |
* simple string needs.
|
1679 |
*
|
1680 |
* Results:
|
1681 |
* The return value is the width (in pixels) of the given string.
|
1682 |
*
|
1683 |
* Side effects:
|
1684 |
* None.
|
1685 |
*
|
1686 |
*---------------------------------------------------------------------------
|
1687 |
*/
|
1688 |
|
1689 |
int
|
1690 |
Tk_TextWidth(tkfont, string, numBytes)
|
1691 |
Tk_Font tkfont; /* Font in which text will be measured. */
|
1692 |
CONST char *string; /* String whose width will be computed. */
|
1693 |
int numBytes; /* Number of bytes to consider from
|
1694 |
* string, or < 0 for strlen(). */
|
1695 |
{
|
1696 |
int width;
|
1697 |
|
1698 |
if (numBytes < 0) {
|
1699 |
numBytes = strlen(string);
|
1700 |
}
|
1701 |
Tk_MeasureChars(tkfont, string, numBytes, -1, 0, &width);
|
1702 |
return width;
|
1703 |
}
|
1704 |
|
1705 |
/*
|
1706 |
*---------------------------------------------------------------------------
|
1707 |
*
|
1708 |
* Tk_UnderlineChars --
|
1709 |
*
|
1710 |
* This procedure draws an underline for a given range of characters
|
1711 |
* in a given string. It doesn't draw the characters (which are
|
1712 |
* assumed to have been displayed previously); it just draws the
|
1713 |
* underline. This procedure would mainly be used to quickly
|
1714 |
* underline a few characters without having to construct an
|
1715 |
* underlined font. To produce properly underlined text, the
|
1716 |
* appropriate underlined font should be constructed and used.
|
1717 |
*
|
1718 |
* Results:
|
1719 |
* None.
|
1720 |
*
|
1721 |
* Side effects:
|
1722 |
* Information gets displayed in "drawable".
|
1723 |
*
|
1724 |
*----------------------------------------------------------------------
|
1725 |
*/
|
1726 |
|
1727 |
void
|
1728 |
Tk_UnderlineChars(display, drawable, gc, tkfont, string, x, y, firstByte,
|
1729 |
lastByte)
|
1730 |
Display *display; /* Display on which to draw. */
|
1731 |
Drawable drawable; /* Window or pixmap in which to draw. */
|
1732 |
GC gc; /* Graphics context for actually drawing
|
1733 |
* line. */
|
1734 |
Tk_Font tkfont; /* Font used in GC; must have been allocated
|
1735 |
* by Tk_GetFont(). Used for character
|
1736 |
* dimensions, etc. */
|
1737 |
CONST char *string; /* String containing characters to be
|
1738 |
* underlined or overstruck. */
|
1739 |
int x, y; /* Coordinates at which first character of
|
1740 |
* string is drawn. */
|
1741 |
int firstByte; /* Index of first byte of first character. */
|
1742 |
int lastByte; /* Index of first byte after the last
|
1743 |
* character. */
|
1744 |
{
|
1745 |
TkFont *fontPtr;
|
1746 |
int startX, endX;
|
1747 |
|
1748 |
fontPtr = (TkFont *) tkfont;
|
1749 |
|
1750 |
Tk_MeasureChars(tkfont, string, firstByte, -1, 0, &startX);
|
1751 |
Tk_MeasureChars(tkfont, string, lastByte, -1, 0, &endX);
|
1752 |
|
1753 |
XFillRectangle(display, drawable, gc, x + startX,
|
1754 |
y + fontPtr->underlinePos, (unsigned int) (endX - startX),
|
1755 |
(unsigned int) fontPtr->underlineHeight);
|
1756 |
}
|
1757 |
|
1758 |
/*
|
1759 |
*---------------------------------------------------------------------------
|
1760 |
*
|
1761 |
* Tk_ComputeTextLayout --
|
1762 |
*
|
1763 |
* Computes the amount of screen space needed to display a
|
1764 |
* multi-line, justified string of text. Records all the
|
1765 |
* measurements that were done to determine to size and
|
1766 |
* positioning of the individual lines of text; this information
|
1767 |
* can be used by the Tk_DrawTextLayout() procedure to
|
1768 |
* display the text quickly (without remeasuring it).
|
1769 |
*
|
1770 |
* This procedure is useful for simple widgets that want to
|
1771 |
* display single-font, multi-line text and want Tk to handle the
|
1772 |
* details.
|
1773 |
*
|
1774 |
* Results:
|
1775 |
* The return value is a Tk_TextLayout token that holds the
|
1776 |
* measurement information for the given string. The token is
|
1777 |
* only valid for the given string. If the string is freed,
|
1778 |
* the token is no longer valid and must also be freed. To free
|
1779 |
* the token, call Tk_FreeTextLayout().
|
1780 |
*
|
1781 |
* The dimensions of the screen area needed to display the text
|
1782 |
* are stored in *widthPtr and *heightPtr.
|
1783 |
*
|
1784 |
* Side effects:
|
1785 |
* Memory is allocated to hold the measurement information.
|
1786 |
*
|
1787 |
*---------------------------------------------------------------------------
|
1788 |
*/
|
1789 |
|
1790 |
Tk_TextLayout
|
1791 |
Tk_ComputeTextLayout(tkfont, string, numChars, wrapLength, justify, flags,
|
1792 |
widthPtr, heightPtr)
|
1793 |
Tk_Font tkfont; /* Font that will be used to display text. */
|
1794 |
CONST char *string; /* String whose dimensions are to be
|
1795 |
* computed. */
|
1796 |
int numChars; /* Number of characters to consider from
|
1797 |
* string, or < 0 for strlen(). */
|
1798 |
int wrapLength; /* Longest permissible line length, in
|
1799 |
* pixels. <= 0 means no automatic wrapping:
|
1800 |
* just let lines get as long as needed. */
|
1801 |
Tk_Justify justify; /* How to justify lines. */
|
1802 |
int flags; /* Flag bits OR-ed together.
|
1803 |
* TK_IGNORE_TABS means that tab characters
|
1804 |
* should not be expanded. TK_IGNORE_NEWLINES
|
1805 |
* means that newline characters should not
|
1806 |
* cause a line break. */
|
1807 |
int *widthPtr; /* Filled with width of string. */
|
1808 |
int *heightPtr; /* Filled with height of string. */
|
1809 |
{
|
1810 |
TkFont *fontPtr;
|
1811 |
CONST char *start, *end, *special;
|
1812 |
int n, y, bytesThisChunk, maxChunks;
|
1813 |
int baseline, height, curX, newX, maxWidth;
|
1814 |
TextLayout *layoutPtr;
|
1815 |
LayoutChunk *chunkPtr;
|
1816 |
CONST TkFontMetrics *fmPtr;
|
1817 |
Tcl_DString lineBuffer;
|
1818 |
int *lineLengths;
|
1819 |
int curLine, layoutHeight;
|
1820 |
|
1821 |
Tcl_DStringInit(&lineBuffer);
|
1822 |
|
1823 |
fontPtr = (TkFont *) tkfont;
|
1824 |
if ((fontPtr == NULL) || (string == NULL)) {
|
1825 |
if (widthPtr != NULL) {
|
1826 |
*widthPtr = 0;
|
1827 |
}
|
1828 |
if (heightPtr != NULL) {
|
1829 |
*heightPtr = 0;
|
1830 |
}
|
1831 |
return NULL;
|
1832 |
}
|
1833 |
|
1834 |
fmPtr = &fontPtr->fm;
|
1835 |
|
1836 |
height = fmPtr->ascent + fmPtr->descent;
|
1837 |
|
1838 |
if (numChars < 0) {
|
1839 |
numChars = Tcl_NumUtfChars(string, -1);
|
1840 |
}
|
1841 |
if (wrapLength == 0) {
|
1842 |
wrapLength = -1;
|
1843 |
}
|
1844 |
|
1845 |
maxChunks = 1;
|
1846 |
|
1847 |
layoutPtr = (TextLayout *) ckalloc(sizeof(TextLayout)
|
1848 |
+ (maxChunks - 1) * sizeof(LayoutChunk));
|
1849 |
layoutPtr->tkfont = tkfont;
|
1850 |
layoutPtr->string = string;
|
1851 |
layoutPtr->numChunks = 0;
|
1852 |
|
1853 |
baseline = fmPtr->ascent;
|
1854 |
maxWidth = 0;
|
1855 |
|
1856 |
/*
|
1857 |
* Divide the string up into simple strings and measure each string.
|
1858 |
*/
|
1859 |
|
1860 |
curX = 0;
|
1861 |
|
1862 |
end = Tcl_UtfAtIndex(string, numChars);
|
1863 |
special = string;
|
1864 |
|
1865 |
flags &= TK_IGNORE_TABS | TK_IGNORE_NEWLINES;
|
1866 |
flags |= TK_WHOLE_WORDS | TK_AT_LEAST_ONE;
|
1867 |
for (start = string; start < end; ) {
|
1868 |
if (start >= special) {
|
1869 |
/*
|
1870 |
* Find the next special character in the string.
|
1871 |
*
|
1872 |
* INTL: Note that it is safe to increment by byte, because we are
|
1873 |
* looking for 7-bit characters that will appear unchanged in
|
1874 |
* UTF-8. At some point we may need to support the full Unicode
|
1875 |
* whitespace set.
|
1876 |
*/
|
1877 |
|
1878 |
for (special = start; special < end; special++) {
|
1879 |
if (!(flags & TK_IGNORE_NEWLINES)) {
|
1880 |
if ((*special == '\n') || (*special == '\r')) {
|
1881 |
break;
|
1882 |
}
|
1883 |
}
|
1884 |
if (!(flags & TK_IGNORE_TABS)) {
|
1885 |
if (*special == '\t') {
|
1886 |
break;
|
1887 |
}
|
1888 |
}
|
1889 |
}
|
1890 |
}
|
1891 |
|
1892 |
/*
|
1893 |
* Special points at the next special character (or the end of the
|
1894 |
* string). Process characters between start and special.
|
1895 |
*/
|
1896 |
|
1897 |
chunkPtr = NULL;
|
1898 |
if (start < special) {
|
1899 |
bytesThisChunk = Tk_MeasureChars(tkfont, start, special - start,
|
1900 |
wrapLength - curX, flags, &newX);
|
1901 |
newX += curX;
|
1902 |
flags &= ~TK_AT_LEAST_ONE;
|
1903 |
if (bytesThisChunk > 0) {
|
1904 |
chunkPtr = NewChunk(&layoutPtr, &maxChunks, start,
|
1905 |
bytesThisChunk, curX, newX, baseline);
|
1906 |
|
1907 |
start += bytesThisChunk;
|
1908 |
curX = newX;
|
1909 |
}
|
1910 |
}
|
1911 |
|
1912 |
if ((start == special) && (special < end)) {
|
1913 |
/*
|
1914 |
* Handle the special character.
|
1915 |
*
|
1916 |
* INTL: Special will be pointing at a 7-bit character so we
|
1917 |
* can safely treat it as a single byte.
|
1918 |
*/
|
1919 |
|
1920 |
chunkPtr = NULL;
|
1921 |
if (*special == '\t') {
|
1922 |
newX = curX + fontPtr->tabWidth;
|
1923 |
newX -= newX % fontPtr->tabWidth;
|
1924 |
NewChunk(&layoutPtr, &maxChunks, start, 1, curX, newX,
|
1925 |
baseline)->numDisplayChars = -1;
|
1926 |
start++;
|
1927 |
if ((start < end) &&
|
1928 |
((wrapLength <= 0) || (newX <= wrapLength))) {
|
1929 |
/*
|
1930 |
* More chars can still fit on this line.
|
1931 |
*/
|
1932 |
|
1933 |
curX = newX;
|
1934 |
flags &= ~TK_AT_LEAST_ONE;
|
1935 |
continue;
|
1936 |
}
|
1937 |
} else {
|
1938 |
NewChunk(&layoutPtr, &maxChunks, start, 1, curX, curX,
|
1939 |
baseline)->numDisplayChars = -1;
|
1940 |
start++;
|
1941 |
goto wrapLine;
|
1942 |
}
|
1943 |
}
|
1944 |
|
1945 |
/*
|
1946 |
* No more characters are going to go on this line, either because
|
1947 |
* no more characters can fit or there are no more characters left.
|
1948 |
* Consume all extra spaces at end of line.
|
1949 |
*/
|
1950 |
|
1951 |
while ((start < end) && isspace(UCHAR(*start))) { /* INTL: ISO space */
|
1952 |
if (!(flags & TK_IGNORE_NEWLINES)) {
|
1953 |
if ((*start == '\n') || (*start == '\r')) {
|
1954 |
break;
|
1955 |
}
|
1956 |
}
|
1957 |
if (!(flags & TK_IGNORE_TABS)) {
|
1958 |
if (*start == '\t') {
|
1959 |
break;
|
1960 |
}
|
1961 |
}
|
1962 |
start++;
|
1963 |
}
|
1964 |
if (chunkPtr != NULL) {
|
1965 |
CONST char *end;
|
1966 |
|
1967 |
/*
|
1968 |
* Append all the extra spaces on this line to the end of the
|
1969 |
* last text chunk. This is a little tricky because we are
|
1970 |
* switching back and forth between characters and bytes.
|
1971 |
*/
|
1972 |
|
1973 |
end = chunkPtr->start + chunkPtr->numBytes;
|
1974 |
bytesThisChunk = start - end;
|
1975 |
if (bytesThisChunk > 0) {
|
1976 |
bytesThisChunk = Tk_MeasureChars(tkfont, end, bytesThisChunk,
|
1977 |
-1, 0, &chunkPtr->totalWidth);
|
1978 |
chunkPtr->numBytes += bytesThisChunk;
|
1979 |
chunkPtr->numChars += Tcl_NumUtfChars(end, bytesThisChunk);
|
1980 |
chunkPtr->totalWidth += curX;
|
1981 |
}
|
1982 |
}
|
1983 |
|
1984 |
wrapLine:
|
1985 |
flags |= TK_AT_LEAST_ONE;
|
1986 |
|
1987 |
/*
|
1988 |
* Save current line length, then move current position to start of
|
1989 |
* next line.
|
1990 |
*/
|
1991 |
|
1992 |
if (curX > maxWidth) {
|
1993 |
maxWidth = curX;
|
1994 |
}
|
1995 |
|
1996 |
/*
|
1997 |
* Remember width of this line, so that all chunks on this line
|
1998 |
* can be centered or right justified, if necessary.
|
1999 |
*/
|
2000 |
|
2001 |
Tcl_DStringAppend(&lineBuffer, (char *) &curX, sizeof(curX));
|
2002 |
|
2003 |
curX = 0;
|
2004 |
baseline += height;
|
2005 |
}
|
2006 |
|
2007 |
/*
|
2008 |
* If last line ends with a newline, then we need to make a 0 width
|
2009 |
* chunk on the next line. Otherwise "Hello" and "Hello\n" are the
|
2010 |
* same height.
|
2011 |
*/
|
2012 |
|
2013 |
if ((layoutPtr->numChunks > 0) && ((flags & TK_IGNORE_NEWLINES) == 0)) {
|
2014 |
if (layoutPtr->chunks[layoutPtr->numChunks - 1].start[0] == '\n') {
|
2015 |
chunkPtr = NewChunk(&layoutPtr, &maxChunks, start, 0, curX,
|
2016 |
curX, baseline);
|
2017 |
chunkPtr->numDisplayChars = -1;
|
2018 |
Tcl_DStringAppend(&lineBuffer, (char *) &curX, sizeof(curX));
|
2019 |
baseline += height;
|
2020 |
}
|
2021 |
}
|
2022 |
|
2023 |
layoutPtr->width = maxWidth;
|
2024 |
layoutHeight = baseline - fmPtr->ascent;
|
2025 |
if (layoutPtr->numChunks == 0) {
|
2026 |
layoutHeight = height;
|
2027 |
|
2028 |
/*
|
2029 |
* This fake chunk is used by the other procedures so that they can
|
2030 |
* pretend that there is a chunk with no chars in it, which makes
|
2031 |
* the coding simpler.
|
2032 |
*/
|
2033 |
|
2034 |
layoutPtr->numChunks = 1;
|
2035 |
layoutPtr->chunks[0].start = string;
|
2036 |
layoutPtr->chunks[0].numBytes = 0;
|
2037 |
layoutPtr->chunks[0].numChars = 0;
|
2038 |
layoutPtr->chunks[0].numDisplayChars = -1;
|
2039 |
layoutPtr->chunks[0].x = 0;
|
2040 |
layoutPtr->chunks[0].y = fmPtr->ascent;
|
2041 |
layoutPtr->chunks[0].totalWidth = 0;
|
2042 |
layoutPtr->chunks[0].displayWidth = 0;
|
2043 |
} else {
|
2044 |
/*
|
2045 |
* Using maximum line length, shift all the chunks so that the lines
|
2046 |
* are all justified correctly.
|
2047 |
*/
|
2048 |
|
2049 |
curLine = 0;
|
2050 |
chunkPtr = layoutPtr->chunks;
|
2051 |
y = chunkPtr->y;
|
2052 |
lineLengths = (int *) Tcl_DStringValue(&lineBuffer);
|
2053 |
for (n = 0; n < layoutPtr->numChunks; n++) {
|
2054 |
int extra;
|
2055 |
|
2056 |
if (chunkPtr->y != y) {
|
2057 |
curLine++;
|
2058 |
y = chunkPtr->y;
|
2059 |
}
|
2060 |
extra = maxWidth - lineLengths[curLine];
|
2061 |
if (justify == TK_JUSTIFY_CENTER) {
|
2062 |
chunkPtr->x += extra / 2;
|
2063 |
} else if (justify == TK_JUSTIFY_RIGHT) {
|
2064 |
chunkPtr->x += extra;
|
2065 |
}
|
2066 |
chunkPtr++;
|
2067 |
}
|
2068 |
}
|
2069 |
|
2070 |
if (widthPtr != NULL) {
|
2071 |
*widthPtr = layoutPtr->width;
|
2072 |
}
|
2073 |
if (heightPtr != NULL) {
|
2074 |
*heightPtr = layoutHeight;
|
2075 |
}
|
2076 |
Tcl_DStringFree(&lineBuffer);
|
2077 |
|
2078 |
return (Tk_TextLayout) layoutPtr;
|
2079 |
}
|
2080 |
|
2081 |
/*
|
2082 |
*---------------------------------------------------------------------------
|
2083 |
*
|
2084 |
* Tk_FreeTextLayout --
|
2085 |
*
|
2086 |
* This procedure is called to release the storage associated with
|
2087 |
* a Tk_TextLayout when it is no longer needed.
|
2088 |
*
|
2089 |
* Results:
|
2090 |
* None.
|
2091 |
*
|
2092 |
* Side effects:
|
2093 |
* Memory is freed.
|
2094 |
*
|
2095 |
*---------------------------------------------------------------------------
|
2096 |
*/
|
2097 |
|
2098 |
void
|
2099 |
Tk_FreeTextLayout(textLayout)
|
2100 |
Tk_TextLayout textLayout; /* The text layout to be released. */
|
2101 |
{
|
2102 |
TextLayout *layoutPtr;
|
2103 |
|
2104 |
layoutPtr = (TextLayout *) textLayout;
|
2105 |
if (layoutPtr != NULL) {
|
2106 |
ckfree((char *) layoutPtr);
|
2107 |
}
|
2108 |
}
|
2109 |
|
2110 |
/*
|
2111 |
*---------------------------------------------------------------------------
|
2112 |
*
|
2113 |
* Tk_DrawTextLayout --
|
2114 |
*
|
2115 |
* Use the information in the Tk_TextLayout token to display a
|
2116 |
* multi-line, justified string of text.
|
2117 |
*
|
2118 |
* This procedure is useful for simple widgets that need to
|
2119 |
* display single-font, multi-line text and want Tk to handle
|
2120 |
* the details.
|
2121 |
*
|
2122 |
* Results:
|
2123 |
* None.
|
2124 |
*
|
2125 |
* Side effects:
|
2126 |
* Text drawn on the screen.
|
2127 |
*
|
2128 |
*---------------------------------------------------------------------------
|
2129 |
*/
|
2130 |
|
2131 |
void
|
2132 |
Tk_DrawTextLayout(display, drawable, gc, layout, x, y, firstChar, lastChar)
|
2133 |
Display *display; /* Display on which to draw. */
|
2134 |
Drawable drawable; /* Window or pixmap in which to draw. */
|
2135 |
GC gc; /* Graphics context to use for drawing text. */
|
2136 |
Tk_TextLayout layout; /* Layout information, from a previous call
|
2137 |
* to Tk_ComputeTextLayout(). */
|
2138 |
int x, y; /* Upper-left hand corner of rectangle in
|
2139 |
* which to draw (pixels). */
|
2140 |
int firstChar; /* The index of the first character to draw
|
2141 |
* from the given text item. 0 specfies the
|
2142 |
* beginning. */
|
2143 |
int lastChar; /* The index just after the last character
|
2144 |
* to draw from the given text item. A number
|
2145 |
* < 0 means to draw all characters. */
|
2146 |
{
|
2147 |
TextLayout *layoutPtr;
|
2148 |
int i, numDisplayChars, drawX;
|
2149 |
CONST char *firstByte;
|
2150 |
CONST char *lastByte;
|
2151 |
LayoutChunk *chunkPtr;
|
2152 |
|
2153 |
layoutPtr = (TextLayout *) layout;
|
2154 |
if (layoutPtr == NULL) {
|
2155 |
return;
|
2156 |
}
|
2157 |
|
2158 |
if (lastChar < 0) {
|
2159 |
lastChar = 100000000;
|
2160 |
}
|
2161 |
chunkPtr = layoutPtr->chunks;
|
2162 |
for (i = 0; i < layoutPtr->numChunks; i++) {
|
2163 |
numDisplayChars = chunkPtr->numDisplayChars;
|
2164 |
if ((numDisplayChars > 0) && (firstChar < numDisplayChars)) {
|
2165 |
if (firstChar <= 0) {
|
2166 |
drawX = 0;
|
2167 |
firstChar = 0;
|
2168 |
firstByte = chunkPtr->start;
|
2169 |
} else {
|
2170 |
firstByte = Tcl_UtfAtIndex(chunkPtr->start, firstChar);
|
2171 |
Tk_MeasureChars(layoutPtr->tkfont, chunkPtr->start,
|
2172 |
firstByte - chunkPtr->start, -1, 0, &drawX);
|
2173 |
}
|
2174 |
if (lastChar < numDisplayChars) {
|
2175 |
numDisplayChars = lastChar;
|
2176 |
}
|
2177 |
lastByte = Tcl_UtfAtIndex(chunkPtr->start, numDisplayChars);
|
2178 |
Tk_DrawChars(display, drawable, gc, layoutPtr->tkfont,
|
2179 |
firstByte, lastByte - firstByte,
|
2180 |
x + chunkPtr->x + drawX, y + chunkPtr->y);
|
2181 |
}
|
2182 |
firstChar -= chunkPtr->numChars;
|
2183 |
lastChar -= chunkPtr->numChars;
|
2184 |
if (lastChar <= 0) {
|
2185 |
break;
|
2186 |
}
|
2187 |
chunkPtr++;
|
2188 |
}
|
2189 |
}
|
2190 |
|
2191 |
/*
|
2192 |
*---------------------------------------------------------------------------
|
2193 |
*
|
2194 |
* Tk_UnderlineTextLayout --
|
2195 |
*
|
2196 |
* Use the information in the Tk_TextLayout token to display an
|
2197 |
* underline below an individual character. This procedure does
|
2198 |
* not draw the text, just the underline.
|
2199 |
*
|
2200 |
* This procedure is useful for simple widgets that need to
|
2201 |
* display single-font, multi-line text with an individual
|
2202 |
* character underlined and want Tk to handle the details.
|
2203 |
* To display larger amounts of underlined text, construct
|
2204 |
* and use an underlined font.
|
2205 |
*
|
2206 |
* Results:
|
2207 |
* None.
|
2208 |
*
|
2209 |
* Side effects:
|
2210 |
* Underline drawn on the screen.
|
2211 |
*
|
2212 |
*---------------------------------------------------------------------------
|
2213 |
*/
|
2214 |
|
2215 |
void
|
2216 |
Tk_UnderlineTextLayout(display, drawable, gc, layout, x, y, underline)
|
2217 |
Display *display; /* Display on which to draw. */
|
2218 |
Drawable drawable; /* Window or pixmap in which to draw. */
|
2219 |
GC gc; /* Graphics context to use for drawing text. */
|
2220 |
Tk_TextLayout layout; /* Layout information, from a previous call
|
2221 |
* to Tk_ComputeTextLayout(). */
|
2222 |
int x, y; /* Upper-left hand corner of rectangle in
|
2223 |
* which to draw (pixels). */
|
2224 |
int underline; /* Index of the single character to
|
2225 |
* underline, or -1 for no underline. */
|
2226 |
{
|
2227 |
TextLayout *layoutPtr;
|
2228 |
TkFont *fontPtr;
|
2229 |
int xx, yy, width, height;
|
2230 |
|
2231 |
if ((Tk_CharBbox(layout, underline, &xx, &yy, &width, &height) != 0)
|
2232 |
&& (width != 0)) {
|
2233 |
layoutPtr = (TextLayout *) layout;
|
2234 |
fontPtr = (TkFont *) layoutPtr->tkfont;
|
2235 |
|
2236 |
XFillRectangle(display, drawable, gc, x + xx,
|
2237 |
y + yy + fontPtr->fm.ascent + fontPtr->underlinePos,
|
2238 |
(unsigned int) width, (unsigned int) fontPtr->underlineHeight);
|
2239 |
}
|
2240 |
}
|
2241 |
|
2242 |
/*
|
2243 |
*---------------------------------------------------------------------------
|
2244 |
*
|
2245 |
* Tk_PointToChar --
|
2246 |
*
|
2247 |
* Use the information in the Tk_TextLayout token to determine the
|
2248 |
* character closest to the given point. The point must be
|
2249 |
* specified with respect to the upper-left hand corner of the
|
2250 |
* text layout, which is considered to be located at (0, 0).
|
2251 |
*
|
2252 |
* Any point whose y-value is less that 0 will be considered closest
|
2253 |
* to the first character in the text layout; any point whose y-value
|
2254 |
* is greater than the height of the text layout will be considered
|
2255 |
* closest to the last character in the text layout.
|
2256 |
*
|
2257 |
* Any point whose x-value is less than 0 will be considered closest
|
2258 |
* to the first character on that line; any point whose x-value is
|
2259 |
* greater than the width of the text layout will be considered
|
2260 |
* closest to the last character on that line.
|
2261 |
*
|
2262 |
* Results:
|
2263 |
* The return value is the index of the character that was
|
2264 |
* closest to the point. Given a text layout with no characters,
|
2265 |
* the value 0 will always be returned, referring to a hypothetical
|
2266 |
* zero-width placeholder character.
|
2267 |
*
|
2268 |
* Side effects:
|
2269 |
* None.
|
2270 |
*
|
2271 |
*---------------------------------------------------------------------------
|
2272 |
*/
|
2273 |
|
2274 |
int
|
2275 |
Tk_PointToChar(layout, x, y)
|
2276 |
Tk_TextLayout layout; /* Layout information, from a previous call
|
2277 |
* to Tk_ComputeTextLayout(). */
|
2278 |
int x, y; /* Coordinates of point to check, with
|
2279 |
* respect to the upper-left corner of the
|
2280 |
* text layout. */
|
2281 |
{
|
2282 |
TextLayout *layoutPtr;
|
2283 |
LayoutChunk *chunkPtr, *lastPtr;
|
2284 |
TkFont *fontPtr;
|
2285 |
int i, n, dummy, baseline, pos, numChars;
|
2286 |
|
2287 |
if (y < 0) {
|
2288 |
/*
|
2289 |
* Point lies above any line in this layout. Return the index of
|
2290 |
* the first char.
|
2291 |
*/
|
2292 |
|
2293 |
return 0;
|
2294 |
}
|
2295 |
|
2296 |
/*
|
2297 |
* Find which line contains the point.
|
2298 |
*/
|
2299 |
|
2300 |
layoutPtr = (TextLayout *) layout;
|
2301 |
fontPtr = (TkFont *) layoutPtr->tkfont;
|
2302 |
lastPtr = chunkPtr = layoutPtr->chunks;
|
2303 |
numChars = 0;
|
2304 |
for (i = 0; i < layoutPtr->numChunks; i++) {
|
2305 |
baseline = chunkPtr->y;
|
2306 |
if (y < baseline + fontPtr->fm.descent) {
|
2307 |
if (x < chunkPtr->x) {
|
2308 |
/*
|
2309 |
* Point is to the left of all chunks on this line. Return
|
2310 |
* the index of the first character on this line.
|
2311 |
*/
|
2312 |
|
2313 |
return numChars;
|
2314 |
}
|
2315 |
if (x >= layoutPtr->width) {
|
2316 |
/*
|
2317 |
* If point lies off right side of the text layout, return
|
2318 |
* the last char in the last chunk on this line. Without
|
2319 |
* this, it might return the index of the first char that
|
2320 |
* was located outside of the text layout.
|
2321 |
*/
|
2322 |
|
2323 |
x = INT_MAX;
|
2324 |
}
|
2325 |
|
2326 |
/*
|
2327 |
* Examine all chunks on this line to see which one contains
|
2328 |
* the specified point.
|
2329 |
*/
|
2330 |
|
2331 |
lastPtr = chunkPtr;
|
2332 |
while ((i < layoutPtr->numChunks) && (chunkPtr->y == baseline)) {
|
2333 |
if (x < chunkPtr->x + chunkPtr->totalWidth) {
|
2334 |
/*
|
2335 |
* Point falls on one of the characters in this chunk.
|
2336 |
*/
|
2337 |
|
2338 |
if (chunkPtr->numDisplayChars < 0) {
|
2339 |
/*
|
2340 |
* This is a special chunk that encapsulates a single
|
2341 |
* tab or newline char.
|
2342 |
*/
|
2343 |
|
2344 |
return numChars;
|
2345 |
}
|
2346 |
n = Tk_MeasureChars((Tk_Font) fontPtr, chunkPtr->start,
|
2347 |
chunkPtr->numBytes, x - chunkPtr->x,
|
2348 |
0, &dummy);
|
2349 |
return numChars + Tcl_NumUtfChars(chunkPtr->start, n);
|
2350 |
}
|
2351 |
numChars += chunkPtr->numChars;
|
2352 |
lastPtr = chunkPtr;
|
2353 |
chunkPtr++;
|
2354 |
i++;
|
2355 |
}
|
2356 |
|
2357 |
/*
|
2358 |
* Point is to the right of all chars in all the chunks on this
|
2359 |
* line. Return the index just past the last char in the last
|
2360 |
* chunk on this line.
|
2361 |
*/
|
2362 |
|
2363 |
pos = numChars;
|
2364 |
if (i < layoutPtr->numChunks) {
|
2365 |
pos--;
|
2366 |
}
|
2367 |
return pos;
|
2368 |
}
|
2369 |
numChars += chunkPtr->numChars;
|
2370 |
lastPtr = chunkPtr;
|
2371 |
chunkPtr++;
|
2372 |
}
|
2373 |
|
2374 |
/*
|
2375 |
* Point lies below any line in this text layout. Return the index
|
2376 |
* just past the last char.
|
2377 |
*/
|
2378 |
|
2379 |
return (lastPtr->start + lastPtr->numChars) - layoutPtr->string;
|
2380 |
}
|
2381 |
|
2382 |
/*
|
2383 |
*---------------------------------------------------------------------------
|
2384 |
*
|
2385 |
* Tk_CharBbox --
|
2386 |
*
|
2387 |
* Use the information in the Tk_TextLayout token to return the
|
2388 |
* bounding box for the character specified by index.
|
2389 |
*
|
2390 |
* The width of the bounding box is the advance width of the
|
2391 |
* character, and does not include and left- or right-bearing.
|
2392 |
* Any character that extends partially outside of the
|
2393 |
* text layout is considered to be truncated at the edge. Any
|
2394 |
* character which is located completely outside of the text
|
2395 |
* layout is considered to be zero-width and pegged against
|
2396 |
* the edge.
|
2397 |
*
|
2398 |
* The height of the bounding box is the line height for this font,
|
2399 |
* extending from the top of the ascent to the bottom of the
|
2400 |
* descent. Information about the actual height of the individual
|
2401 |
* letter is not available.
|
2402 |
*
|
2403 |
* A text layout that contains no characters is considered to
|
2404 |
* contain a single zero-width placeholder character.
|
2405 |
*
|
2406 |
* Results:
|
2407 |
* The return value is 0 if the index did not specify a character
|
2408 |
* in the text layout, or non-zero otherwise. In that case,
|
2409 |
* *bbox is filled with the bounding box of the character.
|
2410 |
*
|
2411 |
* Side effects:
|
2412 |
* None.
|
2413 |
*
|
2414 |
*---------------------------------------------------------------------------
|
2415 |
*/
|
2416 |
|
2417 |
int
|
2418 |
Tk_CharBbox(layout, index, xPtr, yPtr, widthPtr, heightPtr)
|
2419 |
Tk_TextLayout layout; /* Layout information, from a previous call to
|
2420 |
* Tk_ComputeTextLayout(). */
|
2421 |
int index; /* The index of the character whose bbox is
|
2422 |
* desired. */
|
2423 |
int *xPtr, *yPtr; /* Filled with the upper-left hand corner, in
|
2424 |
* pixels, of the bounding box for the character
|
2425 |
* specified by index, if non-NULL. */
|
2426 |
int *widthPtr, *heightPtr;
|
2427 |
/* Filled with the width and height of the
|
2428 |
* bounding box for the character specified by
|
2429 |
* index, if non-NULL. */
|
2430 |
{
|
2431 |
TextLayout *layoutPtr;
|
2432 |
LayoutChunk *chunkPtr;
|
2433 |
int i, x, w;
|
2434 |
Tk_Font tkfont;
|
2435 |
TkFont *fontPtr;
|
2436 |
CONST char *end;
|
2437 |
|
2438 |
if (index < 0) {
|
2439 |
return 0;
|
2440 |
}
|
2441 |
|
2442 |
layoutPtr = (TextLayout *) layout;
|
2443 |
chunkPtr = layoutPtr->chunks;
|
2444 |
tkfont = layoutPtr->tkfont;
|
2445 |
fontPtr = (TkFont *) tkfont;
|
2446 |
|
2447 |
for (i = 0; i < layoutPtr->numChunks; i++) {
|
2448 |
if (chunkPtr->numDisplayChars < 0) {
|
2449 |
if (index == 0) {
|
2450 |
x = chunkPtr->x;
|
2451 |
w = chunkPtr->totalWidth;
|
2452 |
goto check;
|
2453 |
}
|
2454 |
} else if (index < chunkPtr->numChars) {
|
2455 |
end = Tcl_UtfAtIndex(chunkPtr->start, index);
|
2456 |
if (xPtr != NULL) {
|
2457 |
Tk_MeasureChars(tkfont, chunkPtr->start,
|
2458 |
end - chunkPtr->start, -1, 0, &x);
|
2459 |
x += chunkPtr->x;
|
2460 |
}
|
2461 |
if (widthPtr != NULL) {
|
2462 |
Tk_MeasureChars(tkfont, end, Tcl_UtfNext(end) - end,
|
2463 |
-1, 0, &w);
|
2464 |
}
|
2465 |
goto check;
|
2466 |
}
|
2467 |
index -= chunkPtr->numChars;
|
2468 |
chunkPtr++;
|
2469 |
}
|
2470 |
if (index == 0) {
|
2471 |
/*
|
2472 |
* Special case to get location just past last char in layout.
|
2473 |
*/
|
2474 |
|
2475 |
chunkPtr--;
|
2476 |
x = chunkPtr->x + chunkPtr->totalWidth;
|
2477 |
w = 0;
|
2478 |
} else {
|
2479 |
return 0;
|
2480 |
}
|
2481 |
|
2482 |
/*
|
2483 |
* Ensure that the bbox lies within the text layout. This forces all
|
2484 |
* chars that extend off the right edge of the text layout to have
|
2485 |
* truncated widths, and all chars that are completely off the right
|
2486 |
* edge of the text layout to peg to the edge and have 0 width.
|
2487 |
*/
|
2488 |
check:
|
2489 |
if (yPtr != NULL) {
|
2490 |
*yPtr = chunkPtr->y - fontPtr->fm.ascent;
|
2491 |
}
|
2492 |
if (heightPtr != NULL) {
|
2493 |
*heightPtr = fontPtr->fm.ascent + fontPtr->fm.descent;
|
2494 |
}
|
2495 |
|
2496 |
if (x > layoutPtr->width) {
|
2497 |
x = layoutPtr->width;
|
2498 |
}
|
2499 |
if (xPtr != NULL) {
|
2500 |
*xPtr = x;
|
2501 |
}
|
2502 |
if (widthPtr != NULL) {
|
2503 |
if (x + w > layoutPtr->width) {
|
2504 |
w = layoutPtr->width - x;
|
2505 |
}
|
2506 |
*widthPtr = w;
|
2507 |
}
|
2508 |
|
2509 |
return 1;
|
2510 |
}
|
2511 |
|
2512 |
/*
|
2513 |
*---------------------------------------------------------------------------
|
2514 |
*
|
2515 |
* Tk_DistanceToTextLayout --
|
2516 |
*
|
2517 |
* Computes the distance in pixels from the given point to the
|
2518 |
* given text layout. Non-displaying space characters that occur
|
2519 |
* at the end of individual lines in the text layout are ignored
|
2520 |
* for hit detection purposes.
|
2521 |
*
|
2522 |
* Results:
|
2523 |
* The return value is 0 if the point (x, y) is inside the text
|
2524 |
* layout. If the point isn't inside the text layout then the
|
2525 |
* return value is the distance in pixels from the point to the
|
2526 |
* text item.
|
2527 |
*
|
2528 |
* Side effects:
|
2529 |
* None.
|
2530 |
*
|
2531 |
*---------------------------------------------------------------------------
|
2532 |
*/
|
2533 |
|
2534 |
int
|
2535 |
Tk_DistanceToTextLayout(layout, x, y)
|
2536 |
Tk_TextLayout layout; /* Layout information, from a previous call
|
2537 |
* to Tk_ComputeTextLayout(). */
|
2538 |
int x, y; /* Coordinates of point to check, with
|
2539 |
* respect to the upper-left corner of the
|
2540 |
* text layout (in pixels). */
|
2541 |
{
|
2542 |
int i, x1, x2, y1, y2, xDiff, yDiff, dist, minDist, ascent, descent;
|
2543 |
LayoutChunk *chunkPtr;
|
2544 |
TextLayout *layoutPtr;
|
2545 |
TkFont *fontPtr;
|
2546 |
|
2547 |
layoutPtr = (TextLayout *) layout;
|
2548 |
fontPtr = (TkFont *) layoutPtr->tkfont;
|
2549 |
ascent = fontPtr->fm.ascent;
|
2550 |
descent = fontPtr->fm.descent;
|
2551 |
|
2552 |
minDist = 0;
|
2553 |
chunkPtr = layoutPtr->chunks;
|
2554 |
for (i = 0; i < layoutPtr->numChunks; i++) {
|
2555 |
if (chunkPtr->start[0] == '\n') {
|
2556 |
/*
|
2557 |
* Newline characters are not counted when computing distance
|
2558 |
* (but tab characters would still be considered).
|
2559 |
*/
|
2560 |
|
2561 |
chunkPtr++;
|
2562 |
continue;
|
2563 |
}
|
2564 |
|
2565 |
x1 = chunkPtr->x;
|
2566 |
y1 = chunkPtr->y - ascent;
|
2567 |
x2 = chunkPtr->x + chunkPtr->displayWidth;
|
2568 |
y2 = chunkPtr->y + descent;
|
2569 |
|
2570 |
if (x < x1) {
|
2571 |
xDiff = x1 - x;
|
2572 |
} else if (x >= x2) {
|
2573 |
xDiff = x - x2 + 1;
|
2574 |
} else {
|
2575 |
xDiff = 0;
|
2576 |
}
|
2577 |
|
2578 |
if (y < y1) {
|
2579 |
yDiff = y1 - y;
|
2580 |
} else if (y >= y2) {
|
2581 |
yDiff = y - y2 + 1;
|
2582 |
} else {
|
2583 |
yDiff = 0;
|
2584 |
}
|
2585 |
if ((xDiff == 0) && (yDiff == 0)) {
|
2586 |
return 0;
|
2587 |
}
|
2588 |
dist = (int) hypot((double) xDiff, (double) yDiff);
|
2589 |
if ((dist < minDist) || (minDist == 0)) {
|
2590 |
minDist = dist;
|
2591 |
}
|
2592 |
chunkPtr++;
|
2593 |
}
|
2594 |
return minDist;
|
2595 |
}
|
2596 |
|
2597 |
/*
|
2598 |
*---------------------------------------------------------------------------
|
2599 |
*
|
2600 |
* Tk_IntersectTextLayout --
|
2601 |
*
|
2602 |
* Determines whether a text layout lies entirely inside,
|
2603 |
* entirely outside, or overlaps a given rectangle. Non-displaying
|
2604 |
* space characters that occur at the end of individual lines in
|
2605 |
* the text layout are ignored for intersection calculations.
|
2606 |
*
|
2607 |
* Results:
|
2608 |
* The return value is -1 if the text layout is entirely outside of
|
2609 |
* the rectangle, 0 if it overlaps, and 1 if it is entirely inside
|
2610 |
* of the rectangle.
|
2611 |
*
|
2612 |
* Side effects:
|
2613 |
* None.
|
2614 |
*
|
2615 |
*---------------------------------------------------------------------------
|
2616 |
*/
|
2617 |
|
2618 |
int
|
2619 |
Tk_IntersectTextLayout(layout, x, y, width, height)
|
2620 |
Tk_TextLayout layout; /* Layout information, from a previous call
|
2621 |
* to Tk_ComputeTextLayout(). */
|
2622 |
int x, y; /* Upper-left hand corner, in pixels, of
|
2623 |
* rectangular area to compare with text
|
2624 |
* layout. Coordinates are with respect to
|
2625 |
* the upper-left hand corner of the text
|
2626 |
* layout itself. */
|
2627 |
int width, height; /* The width and height of the above
|
2628 |
* rectangular area, in pixels. */
|
2629 |
{
|
2630 |
int result, i, x1, y1, x2, y2;
|
2631 |
TextLayout *layoutPtr;
|
2632 |
LayoutChunk *chunkPtr;
|
2633 |
TkFont *fontPtr;
|
2634 |
int left, top, right, bottom;
|
2635 |
|
2636 |
/*
|
2637 |
* Scan the chunks one at a time, seeing whether each is entirely in,
|
2638 |
* entirely out, or overlapping the rectangle. If an overlap is
|
2639 |
* detected, return immediately; otherwise wait until all chunks have
|
2640 |
* been processed and see if they were all inside or all outside.
|
2641 |
*/
|
2642 |
|
2643 |
layoutPtr = (TextLayout *) layout;
|
2644 |
chunkPtr = layoutPtr->chunks;
|
2645 |
fontPtr = (TkFont *) layoutPtr->tkfont;
|
2646 |
|
2647 |
left = x;
|
2648 |
top = y;
|
2649 |
right = x + width;
|
2650 |
bottom = y + height;
|
2651 |
|
2652 |
result = 0;
|
2653 |
for (i = 0; i < layoutPtr->numChunks; i++) {
|
2654 |
if (chunkPtr->start[0] == '\n') {
|
2655 |
/*
|
2656 |
* Newline characters are not counted when computing area
|
2657 |
* intersection (but tab characters would still be considered).
|
2658 |
*/
|
2659 |
|
2660 |
chunkPtr++;
|
2661 |
continue;
|
2662 |
}
|
2663 |
|
2664 |
x1 = chunkPtr->x;
|
2665 |
y1 = chunkPtr->y - fontPtr->fm.ascent;
|
2666 |
x2 = chunkPtr->x + chunkPtr->displayWidth;
|
2667 |
y2 = chunkPtr->y + fontPtr->fm.descent;
|
2668 |
|
2669 |
if ((right < x1) || (left >= x2)
|
2670 |
|| (bottom < y1) || (top >= y2)) {
|
2671 |
if (result == 1) {
|
2672 |
return 0;
|
2673 |
}
|
2674 |
result = -1;
|
2675 |
} else if ((x1 < left) || (x2 >= right)
|
2676 |
|| (y1 < top) || (y2 >= bottom)) {
|
2677 |
return 0;
|
2678 |
} else if (result == -1) {
|
2679 |
return 0;
|
2680 |
} else {
|
2681 |
result = 1;
|
2682 |
}
|
2683 |
chunkPtr++;
|
2684 |
}
|
2685 |
return result;
|
2686 |
}
|
2687 |
|
2688 |
/*
|
2689 |
*---------------------------------------------------------------------------
|
2690 |
*
|
2691 |
* Tk_TextLayoutToPostscript --
|
2692 |
*
|
2693 |
* Outputs the contents of a text layout in Postscript format.
|
2694 |
* The set of lines in the text layout will be rendered by the user
|
2695 |
* supplied Postscript function. The function should be of the form:
|
2696 |
*
|
2697 |
* justify x y string function --
|
2698 |
*
|
2699 |
* Justify is -1, 0, or 1, depending on whether the following string
|
2700 |
* should be left, center, or right justified, x and y is the
|
2701 |
* location for the origin of the string, string is the sequence
|
2702 |
* of characters to be printed, and function is the name of the
|
2703 |
* caller-provided function; the function should leave nothing
|
2704 |
* on the stack.
|
2705 |
*
|
2706 |
* The meaning of the origin of the string (x and y) depends on
|
2707 |
* the justification. For left justification, x is where the
|
2708 |
* left edge of the string should appear. For center justification,
|
2709 |
* x is where the center of the string should appear. And for right
|
2710 |
* justification, x is where the right edge of the string should
|
2711 |
* appear. This behavior is necessary because, for example, right
|
2712 |
* justified text on the screen is justified with screen metrics.
|
2713 |
* The same string needs to be justified with printer metrics on
|
2714 |
* the printer to appear in the correct place with respect to other
|
2715 |
* similarly justified strings. In all circumstances, y is the
|
2716 |
* location of the baseline for the string.
|
2717 |
*
|
2718 |
* Results:
|
2719 |
* The interp's result is modified to hold the Postscript code that
|
2720 |
* will render the text layout.
|
2721 |
*
|
2722 |
* Side effects:
|
2723 |
* None.
|
2724 |
*
|
2725 |
*---------------------------------------------------------------------------
|
2726 |
*/
|
2727 |
|
2728 |
void
|
2729 |
Tk_TextLayoutToPostscript(interp, layout)
|
2730 |
Tcl_Interp *interp; /* Filled with Postscript code. */
|
2731 |
Tk_TextLayout layout; /* The layout to be rendered. */
|
2732 |
{
|
2733 |
#define MAXUSE 128
|
2734 |
char buf[MAXUSE+10];
|
2735 |
LayoutChunk *chunkPtr;
|
2736 |
int i, j, used, c, baseline;
|
2737 |
Tcl_UniChar ch;
|
2738 |
CONST char *p;
|
2739 |
TextLayout *layoutPtr;
|
2740 |
|
2741 |
layoutPtr = (TextLayout *) layout;
|
2742 |
chunkPtr = layoutPtr->chunks;
|
2743 |
baseline = chunkPtr->y;
|
2744 |
used = 0;
|
2745 |
buf[used++] = '(';
|
2746 |
for (i = 0; i < layoutPtr->numChunks; i++) {
|
2747 |
if (baseline != chunkPtr->y) {
|
2748 |
buf[used++] = ')';
|
2749 |
buf[used++] = '\n';
|
2750 |
buf[used++] = '(';
|
2751 |
baseline = chunkPtr->y;
|
2752 |
}
|
2753 |
if (chunkPtr->numDisplayChars <= 0) {
|
2754 |
if (chunkPtr->start[0] == '\t') {
|
2755 |
buf[used++] = '\\';
|
2756 |
buf[used++] = 't';
|
2757 |
}
|
2758 |
} else {
|
2759 |
p = chunkPtr->start;
|
2760 |
for (j = 0; j < chunkPtr->numDisplayChars; j++) {
|
2761 |
/*
|
2762 |
* INTL: For now we just treat the characters as binary
|
2763 |
* data and display the lower byte. Eventually this should
|
2764 |
* be revised to handle international postscript fonts.
|
2765 |
*/
|
2766 |
|
2767 |
p += Tcl_UtfToUniChar(p, &ch);
|
2768 |
c = UCHAR(ch & 0xff);
|
2769 |
if ((c == '(') || (c == ')') || (c == '\\') || (c < 0x20)
|
2770 |
|| (c >= UCHAR(0x7f))) {
|
2771 |
/*
|
2772 |
* Tricky point: the "03" is necessary in the sprintf
|
2773 |
* below, so that a full three digits of octal are
|
2774 |
* always generated. Without the "03", a number
|
2775 |
* following this sequence could be interpreted by
|
2776 |
* Postscript as part of this sequence.
|
2777 |
*/
|
2778 |
|
2779 |
sprintf(buf + used, "\\%03o", c);
|
2780 |
used += 4;
|
2781 |
} else {
|
2782 |
buf[used++] = c;
|
2783 |
}
|
2784 |
if (used >= MAXUSE) {
|
2785 |
buf[used] = '\0';
|
2786 |
Tcl_AppendResult(interp, buf, (char *) NULL);
|
2787 |
used = 0;
|
2788 |
}
|
2789 |
}
|
2790 |
}
|
2791 |
if (used >= MAXUSE) {
|
2792 |
/*
|
2793 |
* If there are a whole bunch of returns or tabs in a row,
|
2794 |
* then buf[] could get filled up.
|
2795 |
*/
|
2796 |
|
2797 |
buf[used] = '\0';
|
2798 |
Tcl_AppendResult(interp, buf, (char *) NULL);
|
2799 |
used = 0;
|
2800 |
}
|
2801 |
chunkPtr++;
|
2802 |
}
|
2803 |
buf[used++] = ')';
|
2804 |
buf[used++] = '\n';
|
2805 |
buf[used] = '\0';
|
2806 |
Tcl_AppendResult(interp, buf, (char *) NULL);
|
2807 |
}
|
2808 |
|
2809 |
/*
|
2810 |
*---------------------------------------------------------------------------
|
2811 |
*
|
2812 |
* ConfigAttributesObj --
|
2813 |
*
|
2814 |
* Process command line options to fill in fields of a properly
|
2815 |
* initialized font attributes structure.
|
2816 |
*
|
2817 |
* Results:
|
2818 |
* A standard Tcl return value. If TCL_ERROR is returned, an
|
2819 |
* error message will be left in interp's result object.
|
2820 |
*
|
2821 |
* Side effects:
|
2822 |
* The fields of the font attributes structure get filled in with
|
2823 |
* information from argc/argv. If an error occurs while parsing,
|
2824 |
* the font attributes structure will contain all modifications
|
2825 |
* specified in the command line options up to the point of the
|
2826 |
* error.
|
2827 |
*
|
2828 |
*---------------------------------------------------------------------------
|
2829 |
*/
|
2830 |
|
2831 |
static int
|
2832 |
ConfigAttributesObj(interp, tkwin, objc, objv, faPtr)
|
2833 |
Tcl_Interp *interp; /* Interp for error return. */
|
2834 |
Tk_Window tkwin; /* For display on which font will be used. */
|
2835 |
int objc; /* Number of elements in argv. */
|
2836 |
Tcl_Obj *CONST objv[]; /* Command line options. */
|
2837 |
TkFontAttributes *faPtr; /* Font attributes structure whose fields
|
2838 |
* are to be modified. Structure must already
|
2839 |
* be properly initialized. */
|
2840 |
{
|
2841 |
int i, n, index;
|
2842 |
Tcl_Obj *optionPtr, *valuePtr;
|
2843 |
char *value;
|
2844 |
|
2845 |
for (i = 0; i < objc; i += 2) {
|
2846 |
optionPtr = objv[i];
|
2847 |
valuePtr = objv[i + 1];
|
2848 |
|
2849 |
if (Tcl_GetIndexFromObj(interp, optionPtr, fontOpt, "option", 1,
|
2850 |
&index) != TCL_OK) {
|
2851 |
return TCL_ERROR;
|
2852 |
}
|
2853 |
if ((i+2 >= objc) && (objc & 1)) {
|
2854 |
/*
|
2855 |
* This test occurs after Tcl_GetIndexFromObj() so that
|
2856 |
* "font create xyz -xyz" will return the error message
|
2857 |
* that "-xyz" is a bad option, rather than that the value
|
2858 |
* for "-xyz" is missing.
|
2859 |
*/
|
2860 |
|
2861 |
Tcl_AppendResult(interp, "value for \"",
|
2862 |
Tcl_GetString(optionPtr), "\" option missing",
|
2863 |
(char *) NULL);
|
2864 |
return TCL_ERROR;
|
2865 |
}
|
2866 |
|
2867 |
switch (index) {
|
2868 |
case FONT_FAMILY: {
|
2869 |
value = Tcl_GetString(valuePtr);
|
2870 |
faPtr->family = Tk_GetUid(value);
|
2871 |
break;
|
2872 |
}
|
2873 |
case FONT_SIZE: {
|
2874 |
if (Tcl_GetIntFromObj(interp, valuePtr, &n) != TCL_OK) {
|
2875 |
return TCL_ERROR;
|
2876 |
}
|
2877 |
faPtr->size = n;
|
2878 |
break;
|
2879 |
}
|
2880 |
case FONT_WEIGHT: {
|
2881 |
n = TkFindStateNumObj(interp, optionPtr, weightMap, valuePtr);
|
2882 |
if (n == TK_FW_UNKNOWN) {
|
2883 |
return TCL_ERROR;
|
2884 |
}
|
2885 |
faPtr->weight = n;
|
2886 |
break;
|
2887 |
}
|
2888 |
case FONT_SLANT: {
|
2889 |
n = TkFindStateNumObj(interp, optionPtr, slantMap, valuePtr);
|
2890 |
if (n == TK_FS_UNKNOWN) {
|
2891 |
return TCL_ERROR;
|
2892 |
}
|
2893 |
faPtr->slant = n;
|
2894 |
break;
|
2895 |
}
|
2896 |
case FONT_UNDERLINE: {
|
2897 |
if (Tcl_GetBooleanFromObj(interp, valuePtr, &n) != TCL_OK) {
|
2898 |
return TCL_ERROR;
|
2899 |
}
|
2900 |
faPtr->underline = n;
|
2901 |
break;
|
2902 |
}
|
2903 |
case FONT_OVERSTRIKE: {
|
2904 |
if (Tcl_GetBooleanFromObj(interp, valuePtr, &n) != TCL_OK) {
|
2905 |
return TCL_ERROR;
|
2906 |
}
|
2907 |
faPtr->overstrike = n;
|
2908 |
break;
|
2909 |
}
|
2910 |
}
|
2911 |
}
|
2912 |
return TCL_OK;
|
2913 |
}
|
2914 |
|
2915 |
/*
|
2916 |
*---------------------------------------------------------------------------
|
2917 |
*
|
2918 |
* GetAttributeInfoObj --
|
2919 |
*
|
2920 |
* Return information about the font attributes as a Tcl list.
|
2921 |
*
|
2922 |
* Results:
|
2923 |
* The return value is TCL_OK if the objPtr was non-NULL and
|
2924 |
* specified a valid font attribute, TCL_ERROR otherwise. If TCL_OK
|
2925 |
* is returned, the interp's result object is modified to hold a
|
2926 |
* description of either the current value of a single option, or a
|
2927 |
* list of all options and their current values for the given font
|
2928 |
* attributes. If TCL_ERROR is returned, the interp's result is
|
2929 |
* set to an error message describing that the objPtr did not refer
|
2930 |
* to a valid option.
|
2931 |
*
|
2932 |
* Side effects:
|
2933 |
* None.
|
2934 |
*
|
2935 |
*---------------------------------------------------------------------------
|
2936 |
*/
|
2937 |
|
2938 |
static int
|
2939 |
GetAttributeInfoObj(interp, faPtr, objPtr)
|
2940 |
Tcl_Interp *interp; /* Interp to hold result. */
|
2941 |
CONST TkFontAttributes *faPtr; /* The font attributes to inspect. */
|
2942 |
Tcl_Obj *objPtr; /* If non-NULL, indicates the single
|
2943 |
* option whose value is to be
|
2944 |
* returned. Otherwise information is
|
2945 |
* returned for all options. */
|
2946 |
{
|
2947 |
int i, index, start, end;
|
2948 |
char *str;
|
2949 |
Tcl_Obj *optionPtr, *valuePtr, *resultPtr;
|
2950 |
|
2951 |
resultPtr = Tcl_GetObjResult(interp);
|
2952 |
|
2953 |
start = 0;
|
2954 |
end = FONT_NUMFIELDS;
|
2955 |
if (objPtr != NULL) {
|
2956 |
if (Tcl_GetIndexFromObj(interp, objPtr, fontOpt, "option", TCL_EXACT,
|
2957 |
&index) != TCL_OK) {
|
2958 |
return TCL_ERROR;
|
2959 |
}
|
2960 |
start = index;
|
2961 |
end = index + 1;
|
2962 |
}
|
2963 |
|
2964 |
valuePtr = NULL;
|
2965 |
for (i = start; i < end; i++) {
|
2966 |
switch (i) {
|
2967 |
case FONT_FAMILY:
|
2968 |
str = faPtr->family;
|
2969 |
valuePtr = Tcl_NewStringObj(str, ((str == NULL) ? 0 : -1));
|
2970 |
break;
|
2971 |
|
2972 |
case FONT_SIZE:
|
2973 |
valuePtr = Tcl_NewIntObj(faPtr->size);
|
2974 |
break;
|
2975 |
|
2976 |
case FONT_WEIGHT:
|
2977 |
str = TkFindStateString(weightMap, faPtr->weight);
|
2978 |
valuePtr = Tcl_NewStringObj(str, -1);
|
2979 |
break;
|
2980 |
|
2981 |
case FONT_SLANT:
|
2982 |
str = TkFindStateString(slantMap, faPtr->slant);
|
2983 |
valuePtr = Tcl_NewStringObj(str, -1);
|
2984 |
break;
|
2985 |
|
2986 |
case FONT_UNDERLINE:
|
2987 |
valuePtr = Tcl_NewBooleanObj(faPtr->underline);
|
2988 |
break;
|
2989 |
|
2990 |
case FONT_OVERSTRIKE:
|
2991 |
valuePtr = Tcl_NewBooleanObj(faPtr->overstrike);
|
2992 |
break;
|
2993 |
}
|
2994 |
if (objPtr != NULL) {
|
2995 |
Tcl_SetObjResult(interp, valuePtr);
|
2996 |
return TCL_OK;
|
2997 |
}
|
2998 |
optionPtr = Tcl_NewStringObj(fontOpt[i], -1);
|
2999 |
Tcl_ListObjAppendElement(NULL, resultPtr, optionPtr);
|
3000 |
Tcl_ListObjAppendElement(NULL, resultPtr, valuePtr);
|
3001 |
}
|
3002 |
return TCL_OK;
|
3003 |
}
|
3004 |
|
3005 |
/*
|
3006 |
*---------------------------------------------------------------------------
|
3007 |
*
|
3008 |
* ParseFontNameObj --
|
3009 |
*
|
3010 |
* Converts a object into a set of font attributes that can be used
|
3011 |
* to construct a font.
|
3012 |
*
|
3013 |
* The string rep of the object can be one of the following forms:
|
3014 |
* XLFD (see X documentation)
|
3015 |
* "family [size] [style1 [style2 ...]"
|
3016 |
* "-option value [-option value ...]"
|
3017 |
*
|
3018 |
* Results:
|
3019 |
* The return value is TCL_ERROR if the object was syntactically
|
3020 |
* invalid. In that case an error message is left in interp's
|
3021 |
* result object. Otherwise, fills the font attribute buffer with
|
3022 |
* the values parsed from the string and returns TCL_OK;
|
3023 |
*
|
3024 |
* Side effects:
|
3025 |
* None.
|
3026 |
*
|
3027 |
*---------------------------------------------------------------------------
|
3028 |
*/
|
3029 |
|
3030 |
static int
|
3031 |
ParseFontNameObj(interp, tkwin, objPtr, faPtr)
|
3032 |
Tcl_Interp *interp; /* Interp for error return. Must not be
|
3033 |
* NULL. */
|
3034 |
Tk_Window tkwin; /* For display on which font is used. */
|
3035 |
Tcl_Obj *objPtr; /* Parseable font description object. */
|
3036 |
TkFontAttributes *faPtr; /* Filled with attributes parsed from font
|
3037 |
* name. Any attributes that were not
|
3038 |
* specified in font name are filled with
|
3039 |
* default values. */
|
3040 |
{
|
3041 |
char *dash;
|
3042 |
int objc, result, i, n;
|
3043 |
Tcl_Obj **objv;
|
3044 |
char *string;
|
3045 |
|
3046 |
TkInitFontAttributes(faPtr);
|
3047 |
|
3048 |
string = Tcl_GetString(objPtr);
|
3049 |
if (*string == '-') {
|
3050 |
/*
|
3051 |
* This may be an XLFD or an "-option value" string.
|
3052 |
*
|
3053 |
* If the string begins with "-*" or a "-foundry-family-*" pattern,
|
3054 |
* then consider it an XLFD.
|
3055 |
*/
|
3056 |
|
3057 |
if (string[1] == '*') {
|
3058 |
goto xlfd;
|
3059 |
}
|
3060 |
dash = strchr(string + 1, '-');
|
3061 |
if ((dash != NULL)
|
3062 |
&& (!isspace(UCHAR(dash[-1])))) { /* INTL: ISO space */
|
3063 |
goto xlfd;
|
3064 |
}
|
3065 |
|
3066 |
if (Tcl_ListObjGetElements(interp, objPtr, &objc, &objv) != TCL_OK) {
|
3067 |
return TCL_ERROR;
|
3068 |
}
|
3069 |
|
3070 |
return ConfigAttributesObj(interp, tkwin, objc, objv, faPtr);
|
3071 |
}
|
3072 |
|
3073 |
if (*string == '*') {
|
3074 |
/*
|
3075 |
* This is appears to be an XLFD. Under Unix, all valid XLFDs were
|
3076 |
* already handled by TkpGetNativeFont. If we are here, either we
|
3077 |
* have something that initially looks like an XLFD but isn't or we
|
3078 |
* have encountered an XLFD on Windows or Mac.
|
3079 |
*/
|
3080 |
|
3081 |
xlfd:
|
3082 |
result = TkFontParseXLFD(string, faPtr, NULL);
|
3083 |
if (result == TCL_OK) {
|
3084 |
return TCL_OK;
|
3085 |
}
|
3086 |
}
|
3087 |
|
3088 |
/*
|
3089 |
* Wasn't an XLFD or "-option value" string. Try it as a
|
3090 |
* "font size style" list.
|
3091 |
*/
|
3092 |
|
3093 |
if ((Tcl_ListObjGetElements(NULL, objPtr, &objc, &objv) != TCL_OK)
|
3094 |
|| (objc < 1)) {
|
3095 |
Tcl_AppendResult(interp, "font \"", string, "\" doesn't exist",
|
3096 |
(char *) NULL);
|
3097 |
return TCL_ERROR;
|
3098 |
}
|
3099 |
|
3100 |
faPtr->family = Tk_GetUid(Tcl_GetString(objv[0]));
|
3101 |
if (objc > 1) {
|
3102 |
if (Tcl_GetIntFromObj(interp, objv[1], &n) != TCL_OK) {
|
3103 |
return TCL_ERROR;
|
3104 |
}
|
3105 |
faPtr->size = n;
|
3106 |
}
|
3107 |
|
3108 |
i = 2;
|
3109 |
if (objc == 3) {
|
3110 |
if (Tcl_ListObjGetElements(interp, objv[2], &objc, &objv) != TCL_OK) {
|
3111 |
return TCL_ERROR;
|
3112 |
}
|
3113 |
i = 0;
|
3114 |
}
|
3115 |
for ( ; i < objc; i++) {
|
3116 |
n = TkFindStateNumObj(NULL, NULL, weightMap, objv[i]);
|
3117 |
if (n != TK_FW_UNKNOWN) {
|
3118 |
faPtr->weight = n;
|
3119 |
continue;
|
3120 |
}
|
3121 |
n = TkFindStateNumObj(NULL, NULL, slantMap, objv[i]);
|
3122 |
if (n != TK_FS_UNKNOWN) {
|
3123 |
faPtr->slant = n;
|
3124 |
continue;
|
3125 |
}
|
3126 |
n = TkFindStateNumObj(NULL, NULL, underlineMap, objv[i]);
|
3127 |
if (n != 0) {
|
3128 |
faPtr->underline = n;
|
3129 |
continue;
|
3130 |
}
|
3131 |
n = TkFindStateNumObj(NULL, NULL, overstrikeMap, objv[i]);
|
3132 |
if (n != 0) {
|
3133 |
faPtr->overstrike = n;
|
3134 |
continue;
|
3135 |
}
|
3136 |
|
3137 |
/*
|
3138 |
* Unknown style.
|
3139 |
*/
|
3140 |
|
3141 |
Tcl_AppendResult(interp, "unknown font style \"",
|
3142 |
Tcl_GetString(objv[i]), "\"", (char *) NULL);
|
3143 |
return TCL_ERROR;
|
3144 |
}
|
3145 |
return TCL_OK;
|
3146 |
}
|
3147 |
|
3148 |
/*
|
3149 |
*---------------------------------------------------------------------------
|
3150 |
*
|
3151 |
* NewChunk --
|
3152 |
*
|
3153 |
* Helper function for Tk_ComputeTextLayout(). Encapsulates a
|
3154 |
* measured set of characters in a chunk that can be quickly
|
3155 |
* drawn.
|
3156 |
*
|
3157 |
* Results:
|
3158 |
* A pointer to the new chunk in the text layout.
|
3159 |
*
|
3160 |
* Side effects:
|
3161 |
* The text layout is reallocated to hold more chunks as necessary.
|
3162 |
*
|
3163 |
* Currently, Tk_ComputeTextLayout() stores contiguous ranges of
|
3164 |
* "normal" characters in a chunk, along with individual tab
|
3165 |
* and newline chars in their own chunks. All characters in the
|
3166 |
* text layout are accounted for.
|
3167 |
*
|
3168 |
*---------------------------------------------------------------------------
|
3169 |
*/
|
3170 |
static LayoutChunk *
|
3171 |
NewChunk(layoutPtrPtr, maxPtr, start, numBytes, curX, newX, y)
|
3172 |
TextLayout **layoutPtrPtr;
|
3173 |
int *maxPtr;
|
3174 |
CONST char *start;
|
3175 |
int numBytes;
|
3176 |
int curX;
|
3177 |
int newX;
|
3178 |
int y;
|
3179 |
{
|
3180 |
TextLayout *layoutPtr;
|
3181 |
LayoutChunk *chunkPtr;
|
3182 |
int maxChunks, numChars;
|
3183 |
size_t s;
|
3184 |
|
3185 |
layoutPtr = *layoutPtrPtr;
|
3186 |
maxChunks = *maxPtr;
|
3187 |
if (layoutPtr->numChunks == maxChunks) {
|
3188 |
maxChunks *= 2;
|
3189 |
s = sizeof(TextLayout) + ((maxChunks - 1) * sizeof(LayoutChunk));
|
3190 |
layoutPtr = (TextLayout *) ckrealloc((char *) layoutPtr, s);
|
3191 |
|
3192 |
*layoutPtrPtr = layoutPtr;
|
3193 |
*maxPtr = maxChunks;
|
3194 |
}
|
3195 |
numChars = Tcl_NumUtfChars(start, numBytes);
|
3196 |
chunkPtr = &layoutPtr->chunks[layoutPtr->numChunks];
|
3197 |
chunkPtr->start = start;
|
3198 |
chunkPtr->numBytes = numBytes;
|
3199 |
chunkPtr->numChars = numChars;
|
3200 |
chunkPtr->numDisplayChars = numChars;
|
3201 |
chunkPtr->x = curX;
|
3202 |
chunkPtr->y = y;
|
3203 |
chunkPtr->totalWidth = newX - curX;
|
3204 |
chunkPtr->displayWidth = newX - curX;
|
3205 |
layoutPtr->numChunks++;
|
3206 |
|
3207 |
return chunkPtr;
|
3208 |
}
|
3209 |
|
3210 |
/*
|
3211 |
*---------------------------------------------------------------------------
|
3212 |
*
|
3213 |
* TkFontParseXLFD --
|
3214 |
*
|
3215 |
* Break up a fully specified XLFD into a set of font attributes.
|
3216 |
*
|
3217 |
* Results:
|
3218 |
* Return value is TCL_ERROR if string was not a fully specified XLFD.
|
3219 |
* Otherwise, fills font attribute buffer with the values parsed
|
3220 |
* from the XLFD and returns TCL_OK.
|
3221 |
*
|
3222 |
* Side effects:
|
3223 |
* None.
|
3224 |
*
|
3225 |
*---------------------------------------------------------------------------
|
3226 |
*/
|
3227 |
|
3228 |
int
|
3229 |
TkFontParseXLFD(string, faPtr, xaPtr)
|
3230 |
CONST char *string; /* Parseable font description string. */
|
3231 |
TkFontAttributes *faPtr; /* Filled with attributes parsed from font
|
3232 |
* name. Any attributes that were not
|
3233 |
* specified in font name are filled with
|
3234 |
* default values. */
|
3235 |
TkXLFDAttributes *xaPtr; /* Filled with X-specific attributes parsed
|
3236 |
* from font name. Any attributes that were
|
3237 |
* not specified in font name are filled with
|
3238 |
* default values. May be NULL if such
|
3239 |
* information is not desired. */
|
3240 |
{
|
3241 |
char *src;
|
3242 |
CONST char *str;
|
3243 |
int i, j;
|
3244 |
char *field[XLFD_NUMFIELDS + 2];
|
3245 |
Tcl_DString ds;
|
3246 |
TkXLFDAttributes xa;
|
3247 |
|
3248 |
if (xaPtr == NULL) {
|
3249 |
xaPtr = &xa;
|
3250 |
}
|
3251 |
TkInitFontAttributes(faPtr);
|
3252 |
TkInitXLFDAttributes(xaPtr);
|
3253 |
|
3254 |
memset(field, '\0', sizeof(field));
|
3255 |
|
3256 |
str = string;
|
3257 |
if (*str == '-') {
|
3258 |
str++;
|
3259 |
}
|
3260 |
|
3261 |
Tcl_DStringInit(&ds);
|
3262 |
Tcl_DStringAppend(&ds, (char *) str, -1);
|
3263 |
src = Tcl_DStringValue(&ds);
|
3264 |
|
3265 |
field[0] = src;
|
3266 |
for (i = 0; *src != '\0'; src++) {
|
3267 |
if (!(*src & 0x80)
|
3268 |
&& Tcl_UniCharIsUpper(UCHAR(*src))) {
|
3269 |
*src = (char) Tcl_UniCharToLower(UCHAR(*src));
|
3270 |
}
|
3271 |
if (*src == '-') {
|
3272 |
i++;
|
3273 |
if (i == XLFD_NUMFIELDS) {
|
3274 |
continue;
|
3275 |
}
|
3276 |
*src = '\0';
|
3277 |
field[i] = src + 1;
|
3278 |
if (i > XLFD_NUMFIELDS) {
|
3279 |
break;
|
3280 |
}
|
3281 |
}
|
3282 |
}
|
3283 |
|
3284 |
/*
|
3285 |
* An XLFD of the form -adobe-times-medium-r-*-12-*-* is pretty common,
|
3286 |
* but it is (strictly) malformed, because the first * is eliding both
|
3287 |
* the Setwidth and the Addstyle fields. If the Addstyle field is a
|
3288 |
* number, then assume the above incorrect form was used and shift all
|
3289 |
* the rest of the fields right by one, so the number gets interpreted
|
3290 |
* as a pixelsize. This fix is so that we don't get a million reports
|
3291 |
* that "it works under X (as a native font name), but gives a syntax
|
3292 |
* error under Windows (as a parsed set of attributes)".
|
3293 |
*/
|
3294 |
|
3295 |
if ((i > XLFD_ADD_STYLE) && (FieldSpecified(field[XLFD_ADD_STYLE]))) {
|
3296 |
if (atoi(field[XLFD_ADD_STYLE]) != 0) {
|
3297 |
for (j = XLFD_NUMFIELDS - 1; j >= XLFD_ADD_STYLE; j--) {
|
3298 |
field[j + 1] = field[j];
|
3299 |
}
|
3300 |
field[XLFD_ADD_STYLE] = NULL;
|
3301 |
i++;
|
3302 |
}
|
3303 |
}
|
3304 |
|
3305 |
/*
|
3306 |
* Bail if we don't have enough of the fields (up to pointsize).
|
3307 |
*/
|
3308 |
|
3309 |
if (i < XLFD_FAMILY) {
|
3310 |
Tcl_DStringFree(&ds);
|
3311 |
return TCL_ERROR;
|
3312 |
}
|
3313 |
|
3314 |
if (FieldSpecified(field[XLFD_FOUNDRY])) {
|
3315 |
xaPtr->foundry = Tk_GetUid(field[XLFD_FOUNDRY]);
|
3316 |
}
|
3317 |
|
3318 |
if (FieldSpecified(field[XLFD_FAMILY])) {
|
3319 |
faPtr->family = Tk_GetUid(field[XLFD_FAMILY]);
|
3320 |
}
|
3321 |
if (FieldSpecified(field[XLFD_WEIGHT])) {
|
3322 |
faPtr->weight = TkFindStateNum(NULL, NULL, xlfdWeightMap,
|
3323 |
field[XLFD_WEIGHT]);
|
3324 |
}
|
3325 |
if (FieldSpecified(field[XLFD_SLANT])) {
|
3326 |
xaPtr->slant = TkFindStateNum(NULL, NULL, xlfdSlantMap,
|
3327 |
field[XLFD_SLANT]);
|
3328 |
if (xaPtr->slant == TK_FS_ROMAN) {
|
3329 |
faPtr->slant = TK_FS_ROMAN;
|
3330 |
} else {
|
3331 |
faPtr->slant = TK_FS_ITALIC;
|
3332 |
}
|
3333 |
}
|
3334 |
if (FieldSpecified(field[XLFD_SETWIDTH])) {
|
3335 |
xaPtr->setwidth = TkFindStateNum(NULL, NULL, xlfdSetwidthMap,
|
3336 |
field[XLFD_SETWIDTH]);
|
3337 |
}
|
3338 |
|
3339 |
/* XLFD_ADD_STYLE ignored. */
|
3340 |
|
3341 |
/*
|
3342 |
* Pointsize in tenths of a point, but treat it as tenths of a pixel
|
3343 |
* for historical compatibility.
|
3344 |
*/
|
3345 |
|
3346 |
faPtr->size = 12;
|
3347 |
|
3348 |
if (FieldSpecified(field[XLFD_POINT_SIZE])) {
|
3349 |
if (field[XLFD_POINT_SIZE][0] == '[') {
|
3350 |
/*
|
3351 |
* Some X fonts have the point size specified as follows:
|
3352 |
*
|
3353 |
* [ N1 N2 N3 N4 ]
|
3354 |
*
|
3355 |
* where N1 is the point size (in points, not decipoints!), and
|
3356 |
* N2, N3, and N4 are some additional numbers that I don't know
|
3357 |
* the purpose of, so I ignore them.
|
3358 |
*/
|
3359 |
|
3360 |
faPtr->size = atoi(field[XLFD_POINT_SIZE] + 1);
|
3361 |
} else if (Tcl_GetInt(NULL, field[XLFD_POINT_SIZE],
|
3362 |
&faPtr->size) == TCL_OK) {
|
3363 |
faPtr->size /= 10;
|
3364 |
} else {
|
3365 |
return TCL_ERROR;
|
3366 |
}
|
3367 |
}
|
3368 |
|
3369 |
/*
|
3370 |
* Pixel height of font. If specified, overrides pointsize.
|
3371 |
*/
|
3372 |
|
3373 |
if (FieldSpecified(field[XLFD_PIXEL_SIZE])) {
|
3374 |
if (field[XLFD_PIXEL_SIZE][0] == '[') {
|
3375 |
/*
|
3376 |
* Some X fonts have the pixel size specified as follows:
|
3377 |
*
|
3378 |
* [ N1 N2 N3 N4 ]
|
3379 |
*
|
3380 |
* where N1 is the pixel size, and where N2, N3, and N4
|
3381 |
* are some additional numbers that I don't know
|
3382 |
* the purpose of, so I ignore them.
|
3383 |
*/
|
3384 |
|
3385 |
faPtr->size = atoi(field[XLFD_PIXEL_SIZE] + 1);
|
3386 |
} else if (Tcl_GetInt(NULL, field[XLFD_PIXEL_SIZE],
|
3387 |
&faPtr->size) != TCL_OK) {
|
3388 |
return TCL_ERROR;
|
3389 |
}
|
3390 |
}
|
3391 |
|
3392 |
faPtr->size = -faPtr->size;
|
3393 |
|
3394 |
/* XLFD_RESOLUTION_X ignored. */
|
3395 |
|
3396 |
/* XLFD_RESOLUTION_Y ignored. */
|
3397 |
|
3398 |
/* XLFD_SPACING ignored. */
|
3399 |
|
3400 |
/* XLFD_AVERAGE_WIDTH ignored. */
|
3401 |
|
3402 |
if (FieldSpecified(field[XLFD_CHARSET])) {
|
3403 |
xaPtr->charset = Tk_GetUid(field[XLFD_CHARSET]);
|
3404 |
} else {
|
3405 |
xaPtr->charset = Tk_GetUid("iso8859-1");
|
3406 |
}
|
3407 |
Tcl_DStringFree(&ds);
|
3408 |
return TCL_OK;
|
3409 |
}
|
3410 |
|
3411 |
/*
|
3412 |
*---------------------------------------------------------------------------
|
3413 |
*
|
3414 |
* FieldSpecified --
|
3415 |
*
|
3416 |
* Helper function for TkParseXLFD(). Determines if a field in the
|
3417 |
* XLFD was set to a non-null, non-don't-care value.
|
3418 |
*
|
3419 |
* Results:
|
3420 |
* The return value is 0 if the field in the XLFD was not set and
|
3421 |
* should be ignored, non-zero otherwise.
|
3422 |
*
|
3423 |
* Side effects:
|
3424 |
* None.
|
3425 |
*
|
3426 |
*---------------------------------------------------------------------------
|
3427 |
*/
|
3428 |
|
3429 |
static int
|
3430 |
FieldSpecified(field)
|
3431 |
CONST char *field; /* The field of the XLFD to check. Strictly
|
3432 |
* speaking, only when the string is "*" does it mean
|
3433 |
* don't-care. However, an unspecified or question
|
3434 |
* mark is also interpreted as don't-care. */
|
3435 |
{
|
3436 |
char ch;
|
3437 |
|
3438 |
if (field == NULL) {
|
3439 |
return 0;
|
3440 |
}
|
3441 |
ch = field[0];
|
3442 |
return (ch != '*' && ch != '?');
|
3443 |
}
|
3444 |
|
3445 |
/*
|
3446 |
*---------------------------------------------------------------------------
|
3447 |
*
|
3448 |
* TkFontGetPixels --
|
3449 |
*
|
3450 |
* Given a font size specification (as described in the TkFontAttributes
|
3451 |
* structure) return the number of pixels it represents.
|
3452 |
*
|
3453 |
* Results:
|
3454 |
* As above.
|
3455 |
*
|
3456 |
* Side effects:
|
3457 |
* None.
|
3458 |
*
|
3459 |
*---------------------------------------------------------------------------
|
3460 |
*/
|
3461 |
|
3462 |
int
|
3463 |
TkFontGetPixels(tkwin, size)
|
3464 |
Tk_Window tkwin; /* For point->pixel conversion factor. */
|
3465 |
int size; /* Font size. */
|
3466 |
{
|
3467 |
double d;
|
3468 |
|
3469 |
if (size < 0) {
|
3470 |
return -size;
|
3471 |
}
|
3472 |
|
3473 |
d = size * 25.4 / 72.0;
|
3474 |
d *= WidthOfScreen(Tk_Screen(tkwin));
|
3475 |
d /= WidthMMOfScreen(Tk_Screen(tkwin));
|
3476 |
return (int) (d + 0.5);
|
3477 |
}
|
3478 |
|
3479 |
/*
|
3480 |
*---------------------------------------------------------------------------
|
3481 |
*
|
3482 |
* TkFontGetPoints --
|
3483 |
*
|
3484 |
* Given a font size specification (as described in the TkFontAttributes
|
3485 |
* structure) return the number of points it represents.
|
3486 |
*
|
3487 |
* Results:
|
3488 |
* As above.
|
3489 |
*
|
3490 |
* Side effects:
|
3491 |
* None.
|
3492 |
*
|
3493 |
*---------------------------------------------------------------------------
|
3494 |
*/
|
3495 |
|
3496 |
int
|
3497 |
TkFontGetPoints(tkwin, size)
|
3498 |
Tk_Window tkwin; /* For pixel->point conversion factor. */
|
3499 |
int size; /* Font size. */
|
3500 |
{
|
3501 |
double d;
|
3502 |
|
3503 |
if (size >= 0) {
|
3504 |
return size;
|
3505 |
}
|
3506 |
|
3507 |
d = -size * 72.0 / 25.4;
|
3508 |
d *= WidthMMOfScreen(Tk_Screen(tkwin));
|
3509 |
d /= WidthOfScreen(Tk_Screen(tkwin));
|
3510 |
return (int) (d + 0.5);
|
3511 |
}
|
3512 |
|
3513 |
/*
|
3514 |
*-------------------------------------------------------------------------
|
3515 |
*
|
3516 |
* TkFontGetAliasList --
|
3517 |
*
|
3518 |
* Given a font name, find the list of all aliases for that font
|
3519 |
* name. One of the names in this list will probably be the name
|
3520 |
* that this platform expects when asking for the font.
|
3521 |
*
|
3522 |
* Results:
|
3523 |
* As above. The return value is NULL if the font name has no
|
3524 |
* aliases.
|
3525 |
*
|
3526 |
* Side effects:
|
3527 |
* None.
|
3528 |
*
|
3529 |
*-------------------------------------------------------------------------
|
3530 |
*/
|
3531 |
|
3532 |
char **
|
3533 |
TkFontGetAliasList(faceName)
|
3534 |
CONST char *faceName; /* Font name to test for aliases. */
|
3535 |
{
|
3536 |
int i, j;
|
3537 |
|
3538 |
for (i = 0; fontAliases[i] != NULL; i++) {
|
3539 |
for (j = 0; fontAliases[i][j] != NULL; j++) {
|
3540 |
if (strcasecmp(faceName, fontAliases[i][j]) == 0) {
|
3541 |
return fontAliases[i];
|
3542 |
}
|
3543 |
}
|
3544 |
}
|
3545 |
return NULL;
|
3546 |
}
|
3547 |
|
3548 |
/*
|
3549 |
*-------------------------------------------------------------------------
|
3550 |
*
|
3551 |
* TkFontGetFallbacks --
|
3552 |
*
|
3553 |
* Get the list of font fallbacks that the platform-specific code
|
3554 |
* can use to try to find the closest matching font the name
|
3555 |
* requested.
|
3556 |
*
|
3557 |
* Results:
|
3558 |
* As above.
|
3559 |
*
|
3560 |
* Side effects:
|
3561 |
* None.
|
3562 |
*
|
3563 |
*-------------------------------------------------------------------------
|
3564 |
*/
|
3565 |
|
3566 |
char ***
|
3567 |
TkFontGetFallbacks()
|
3568 |
{
|
3569 |
return fontFallbacks;
|
3570 |
}
|
3571 |
|
3572 |
/*
|
3573 |
*-------------------------------------------------------------------------
|
3574 |
*
|
3575 |
* TkFontGetGlobalClass --
|
3576 |
*
|
3577 |
* Get the list of fonts to try if the requested font name does not
|
3578 |
* exist and no fallbacks for that font name could be used either.
|
3579 |
* The names in this list are considered preferred over all the other
|
3580 |
* font names in the system when looking for a last-ditch fallback.
|
3581 |
*
|
3582 |
* Results:
|
3583 |
* As above.
|
3584 |
*
|
3585 |
* Side effects:
|
3586 |
* None.
|
3587 |
*
|
3588 |
*-------------------------------------------------------------------------
|
3589 |
*/
|
3590 |
|
3591 |
char **
|
3592 |
TkFontGetGlobalClass()
|
3593 |
{
|
3594 |
return globalFontClass;
|
3595 |
}
|
3596 |
|
3597 |
/*
|
3598 |
*-------------------------------------------------------------------------
|
3599 |
*
|
3600 |
* TkFontGetSymbolClass --
|
3601 |
*
|
3602 |
* Get the list of fonts that are symbolic; used if the operating
|
3603 |
* system cannot apriori identify symbolic fonts on its own.
|
3604 |
*
|
3605 |
* Results:
|
3606 |
* As above.
|
3607 |
*
|
3608 |
* Side effects:
|
3609 |
* None.
|
3610 |
*
|
3611 |
*-------------------------------------------------------------------------
|
3612 |
*/
|
3613 |
|
3614 |
char **
|
3615 |
TkFontGetSymbolClass()
|
3616 |
{
|
3617 |
return symbolClass;
|
3618 |
}
|
3619 |
|
3620 |
/*
|
3621 |
*----------------------------------------------------------------------
|
3622 |
*
|
3623 |
* TkDebugFont --
|
3624 |
*
|
3625 |
* This procedure returns debugging information about a font.
|
3626 |
*
|
3627 |
* Results:
|
3628 |
* The return value is a list with one sublist for each TkFont
|
3629 |
* corresponding to "name". Each sublist has two elements that
|
3630 |
* contain the resourceRefCount and objRefCount fields from the
|
3631 |
* TkFont structure.
|
3632 |
*
|
3633 |
* Side effects:
|
3634 |
* None.
|
3635 |
*
|
3636 |
*----------------------------------------------------------------------
|
3637 |
*/
|
3638 |
|
3639 |
Tcl_Obj *
|
3640 |
TkDebugFont(tkwin, name)
|
3641 |
Tk_Window tkwin; /* The window in which the font will be
|
3642 |
* used (not currently used). */
|
3643 |
char *name; /* Name of the desired color. */
|
3644 |
{
|
3645 |
TkFont *fontPtr;
|
3646 |
Tcl_HashEntry *hashPtr;
|
3647 |
Tcl_Obj *resultPtr, *objPtr;
|
3648 |
|
3649 |
resultPtr = Tcl_NewObj();
|
3650 |
hashPtr = Tcl_FindHashEntry(
|
3651 |
&((TkWindow *) tkwin)->mainPtr->fontInfoPtr->fontCache, name);
|
3652 |
if (hashPtr != NULL) {
|
3653 |
fontPtr = (TkFont *) Tcl_GetHashValue(hashPtr);
|
3654 |
if (fontPtr == NULL) {
|
3655 |
panic("TkDebugFont found empty hash table entry");
|
3656 |
}
|
3657 |
for ( ; (fontPtr != NULL); fontPtr = fontPtr->nextPtr) {
|
3658 |
objPtr = Tcl_NewObj();
|
3659 |
Tcl_ListObjAppendElement(NULL, objPtr,
|
3660 |
Tcl_NewIntObj(fontPtr->resourceRefCount));
|
3661 |
Tcl_ListObjAppendElement(NULL, objPtr,
|
3662 |
Tcl_NewIntObj(fontPtr->objRefCount));
|
3663 |
Tcl_ListObjAppendElement(NULL, resultPtr, objPtr);
|
3664 |
}
|
3665 |
}
|
3666 |
return resultPtr;
|
3667 |
}
|
3668 |
|
3669 |
|
3670 |
|
3671 |
/* $History: tkFont.c $
|
3672 |
*
|
3673 |
* ***************** Version 1 *****************
|
3674 |
* User: Dtashley Date: 1/02/01 Time: 2:48a
|
3675 |
* Created in $/IjuScripter, IjuConsole/Source/Tk Base
|
3676 |
* Initial check-in.
|
3677 |
*/
|
3678 |
|
3679 |
/* End of TKFONT.C */ |