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/* $Header$ */
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dashley |
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/*
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* tkText.h --
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*
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* Declarations shared among the files that implement text
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* widgets.
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*
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* Copyright (c) 1992-1994 The Regents of the University of California.
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* Copyright (c) 1994-1995 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: tktext.h,v 1.1.1.1 2001/06/13 05:08:53 dtashley Exp $
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*/
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#ifndef _TKTEXT
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#define _TKTEXT
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#ifndef _TK
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#include "tk.h"
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#endif
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#ifdef BUILD_tk
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# undef TCL_STORAGE_CLASS
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# define TCL_STORAGE_CLASS DLLEXPORT
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#endif
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/*
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* Opaque types for structures whose guts are only needed by a single
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* file:
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*/
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typedef struct TkTextBTree *TkTextBTree;
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/*
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* The data structure below defines a single line of text (from newline
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* to newline, not necessarily what appears on one line of the screen).
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*/
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typedef struct TkTextLine {
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struct Node *parentPtr; /* Pointer to parent node containing
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* line. */
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struct TkTextLine *nextPtr; /* Next in linked list of lines with
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* same parent node in B-tree. NULL
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* means end of list. */
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struct TkTextSegment *segPtr; /* First in ordered list of segments
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* that make up the line. */
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} TkTextLine;
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/*
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* -----------------------------------------------------------------------
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* Segments: each line is divided into one or more segments, where each
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* segment is one of several things, such as a group of characters, a
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* tag toggle, a mark, or an embedded widget. Each segment starts with
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* a standard header followed by a body that varies from type to type.
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* -----------------------------------------------------------------------
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*/
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/*
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* The data structure below defines the body of a segment that represents
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* a tag toggle. There is one of these structures at both the beginning
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* and end of each tagged range.
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*/
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typedef struct TkTextToggle {
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struct TkTextTag *tagPtr; /* Tag that starts or ends here. */
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int inNodeCounts; /* 1 means this toggle has been
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* accounted for in node toggle
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* counts; 0 means it hasn't, yet. */
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} TkTextToggle;
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/*
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* The data structure below defines line segments that represent
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* marks. There is one of these for each mark in the text.
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*/
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typedef struct TkTextMark {
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struct TkText *textPtr; /* Overall information about text
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* widget. */
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TkTextLine *linePtr; /* Line structure that contains the
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* segment. */
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Tcl_HashEntry *hPtr; /* Pointer to hash table entry for mark
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* (in textPtr->markTable). */
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} TkTextMark;
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/*
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* A structure of the following type holds information for each window
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* embedded in a text widget. This information is only used by the
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* file tkTextWind.c
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*/
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typedef struct TkTextEmbWindow {
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struct TkText *textPtr; /* Information about the overall text
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* widget. */
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TkTextLine *linePtr; /* Line structure that contains this
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* window. */
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Tk_Window tkwin; /* Window for this segment. NULL
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* means that the window hasn't
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* been created yet. */
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char *create; /* Script to create window on-demand.
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* NULL means no such script.
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* Malloc-ed. */
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int align; /* How to align window in vertical
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* space. See definitions in
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* tkTextWind.c. */
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int padX, padY; /* Padding to leave around each side
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* of window, in pixels. */
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int stretch; /* Should window stretch to fill
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* vertical space of line (except for
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* pady)? 0 or 1. */
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int chunkCount; /* Number of display chunks that
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* refer to this window. */
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int displayed; /* Non-zero means that the window
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* has been displayed on the screen
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* recently. */
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} TkTextEmbWindow;
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/*
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* A structure of the following type holds information for each image
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* embedded in a text widget. This information is only used by the
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* file tkTextImage.c
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*/
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typedef struct TkTextEmbImage {
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struct TkText *textPtr; /* Information about the overall text
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* widget. */
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TkTextLine *linePtr; /* Line structure that contains this
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* image. */
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char *imageString; /* Name of the image for this segment */
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char *imageName; /* Name used by text widget to identify
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* this image. May be unique-ified */
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char *name; /* Name used in the hash table.
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* used by "image names" to identify
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* this instance of the image */
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Tk_Image image; /* Image for this segment. NULL
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* means that the image hasn't
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* been created yet. */
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int align; /* How to align image in vertical
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* space. See definitions in
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* tkTextImage.c. */
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int padX, padY; /* Padding to leave around each side
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* of image, in pixels. */
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int chunkCount; /* Number of display chunks that
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* refer to this image. */
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} TkTextEmbImage;
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/*
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* The data structure below defines line segments.
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*/
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typedef struct TkTextSegment {
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struct Tk_SegType *typePtr; /* Pointer to record describing
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* segment's type. */
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struct TkTextSegment *nextPtr; /* Next in list of segments for this
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* line, or NULL for end of list. */
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int size; /* Size of this segment (# of bytes
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* of index space it occupies). */
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union {
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char chars[4]; /* Characters that make up character
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* info. Actual length varies to
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* hold as many characters as needed.*/
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TkTextToggle toggle; /* Information about tag toggle. */
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TkTextMark mark; /* Information about mark. */
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TkTextEmbWindow ew; /* Information about embedded
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* window. */
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TkTextEmbImage ei; /* Information about embedded
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* image. */
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} body;
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} TkTextSegment;
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/*
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* Data structures of the type defined below are used during the
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* execution of Tcl commands to keep track of various interesting
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* places in a text. An index is only valid up until the next
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* modification to the character structure of the b-tree so they
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* can't be retained across Tcl commands. However, mods to marks
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* or tags don't invalidate indices.
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*/
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typedef struct TkTextIndex {
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TkTextBTree tree; /* Tree containing desired position. */
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TkTextLine *linePtr; /* Pointer to line containing position
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* of interest. */
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int byteIndex; /* Index within line of desired
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* character (0 means first one). */
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} TkTextIndex;
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/*
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* Types for procedure pointers stored in TkTextDispChunk strutures:
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*/
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typedef struct TkTextDispChunk TkTextDispChunk;
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typedef void Tk_ChunkDisplayProc _ANSI_ARGS_((
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TkTextDispChunk *chunkPtr, int x, int y,
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int height, int baseline, Display *display,
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Drawable dst, int screenY));
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typedef void Tk_ChunkUndisplayProc _ANSI_ARGS_((
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struct TkText *textPtr,
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TkTextDispChunk *chunkPtr));
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typedef int Tk_ChunkMeasureProc _ANSI_ARGS_((
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TkTextDispChunk *chunkPtr, int x));
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typedef void Tk_ChunkBboxProc _ANSI_ARGS_((
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TkTextDispChunk *chunkPtr, int index, int y,
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int lineHeight, int baseline, int *xPtr,
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int *yPtr, int *widthPtr, int *heightPtr));
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/*
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* The structure below represents a chunk of stuff that is displayed
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* together on the screen. This structure is allocated and freed by
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* generic display code but most of its fields are filled in by
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* segment-type-specific code.
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*/
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struct TkTextDispChunk {
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/*
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* The fields below are set by the type-independent code before
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* calling the segment-type-specific layoutProc. They should not
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* be modified by segment-type-specific code.
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*/
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int x; /* X position of chunk, in pixels.
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* This position is measured from the
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* left edge of the logical line,
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* not from the left edge of the
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* window (i.e. it doesn't change
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* under horizontal scrolling). */
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struct TkTextDispChunk *nextPtr; /* Next chunk in the display line
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* or NULL for the end of the list. */
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struct TextStyle *stylePtr; /* Display information, known only
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* to tkTextDisp.c. */
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/*
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* The fields below are set by the layoutProc that creates the
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* chunk.
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*/
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Tk_ChunkDisplayProc *displayProc; /* Procedure to invoke to draw this
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* chunk on the display or an
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* off-screen pixmap. */
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Tk_ChunkUndisplayProc *undisplayProc;
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/* Procedure to invoke when segment
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* ceases to be displayed on screen
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* anymore. */
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Tk_ChunkMeasureProc *measureProc; /* Procedure to find character under
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* a given x-location. */
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Tk_ChunkBboxProc *bboxProc; /* Procedure to find bounding box
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* of character in chunk. */
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int numBytes; /* Number of bytes that will be
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* displayed in the chunk. */
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int minAscent; /* Minimum space above the baseline
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* needed by this chunk. */
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int minDescent; /* Minimum space below the baseline
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* needed by this chunk. */
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int minHeight; /* Minimum total line height needed
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* by this chunk. */
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int width; /* Width of this chunk, in pixels.
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* Initially set by chunk-specific
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* code, but may be increased to
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* include tab or extra space at end
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* of line. */
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int breakIndex; /* Index within chunk of last
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* acceptable position for a line
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* (break just before this byte index).
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* <= 0 means don't break during or
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* immediately after this chunk. */
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ClientData clientData; /* Additional information for use
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* of displayProc and undisplayProc. */
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};
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/*
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* One data structure of the following type is used for each tag in a
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* text widget. These structures are kept in textPtr->tagTable and
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* referred to in other structures.
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*/
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typedef enum { TEXT_WRAPMODE_NULL, TEXT_WRAPMODE_NONE,
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TEXT_WRAPMODE_CHAR, TEXT_WRAPMODE_WORD
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} TkWrapMode;
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extern Tk_CustomOption textWrapModeOption;
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typedef struct TkTextTag {
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char *name; /* Name of this tag. This field is actually
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* a pointer to the key from the entry in
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* textPtr->tagTable, so it needn't be freed
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* explicitly. */
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int priority; /* Priority of this tag within widget. 0
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* means lowest priority. Exactly one tag
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* has each integer value between 0 and
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* numTags-1. */
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struct Node *tagRootPtr; /* Pointer into the B-Tree at the lowest
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* node that completely dominates the ranges
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* of text occupied by the tag. At this
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* node there is no information about the
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* tag. One or more children of the node
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* do contain information about the tag. */
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int toggleCount; /* Total number of tag toggles */
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/*
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* Information for displaying text with this tag. The information
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* belows acts as an override on information specified by lower-priority
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* tags. If no value is specified, then the next-lower-priority tag
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* on the text determins the value. The text widget itself provides
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* defaults if no tag specifies an override.
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*/
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Tk_3DBorder border; /* Used for drawing background. NULL means
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* no value specified here. */
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char *bdString; /* -borderwidth option string (malloc-ed).
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* NULL means option not specified. */
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int borderWidth; /* Width of 3-D border for background. */
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char *reliefString; /* -relief option string (malloc-ed).
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* NULL means option not specified. */
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int relief; /* 3-D relief for background. */
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Pixmap bgStipple; /* Stipple bitmap for background. None
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* means no value specified here. */
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XColor *fgColor; /* Foreground color for text. NULL means
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* no value specified here. */
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Tk_Font tkfont; /* Font for displaying text. NULL means
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* no value specified here. */
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Pixmap fgStipple; /* Stipple bitmap for text and other
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* foreground stuff. None means no value
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* specified here.*/
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char *justifyString; /* -justify option string (malloc-ed).
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* NULL means option not specified. */
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Tk_Justify justify; /* How to justify text: TK_JUSTIFY_LEFT,
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* TK_JUSTIFY_RIGHT, or TK_JUSTIFY_CENTER.
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* Only valid if justifyString is non-NULL. */
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char *lMargin1String; /* -lmargin1 option string (malloc-ed).
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* NULL means option not specified. */
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int lMargin1; /* Left margin for first display line of
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* each text line, in pixels. Only valid
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* if lMargin1String is non-NULL. */
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char *lMargin2String; /* -lmargin2 option string (malloc-ed).
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* NULL means option not specified. */
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int lMargin2; /* Left margin for second and later display
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* lines of each text line, in pixels. Only
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* valid if lMargin2String is non-NULL. */
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char *offsetString; /* -offset option string (malloc-ed).
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* NULL means option not specified. */
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int offset; /* Vertical offset of text's baseline from
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* baseline of line. Used for superscripts
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* and subscripts. Only valid if
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* offsetString is non-NULL. */
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348 |
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char *overstrikeString; /* -overstrike option string (malloc-ed).
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* NULL means option not specified. */
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int overstrike; /* Non-zero means draw horizontal line through
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* middle of text. Only valid if
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|
|
* overstrikeString is non-NULL. */
|
353 |
|
|
char *rMarginString; /* -rmargin option string (malloc-ed).
|
354 |
|
|
* NULL means option not specified. */
|
355 |
|
|
int rMargin; /* Right margin for text, in pixels. Only
|
356 |
|
|
* valid if rMarginString is non-NULL. */
|
357 |
|
|
char *spacing1String; /* -spacing1 option string (malloc-ed).
|
358 |
|
|
* NULL means option not specified. */
|
359 |
|
|
int spacing1; /* Extra spacing above first display
|
360 |
|
|
* line for text line. Only valid if
|
361 |
|
|
* spacing1String is non-NULL. */
|
362 |
|
|
char *spacing2String; /* -spacing2 option string (malloc-ed).
|
363 |
|
|
* NULL means option not specified. */
|
364 |
|
|
int spacing2; /* Extra spacing between display
|
365 |
|
|
* lines for the same text line. Only valid
|
366 |
|
|
* if spacing2String is non-NULL. */
|
367 |
|
|
char *spacing3String; /* -spacing2 option string (malloc-ed).
|
368 |
|
|
* NULL means option not specified. */
|
369 |
|
|
int spacing3; /* Extra spacing below last display
|
370 |
|
|
* line for text line. Only valid if
|
371 |
|
|
* spacing3String is non-NULL. */
|
372 |
|
|
char *tabString; /* -tabs option string (malloc-ed).
|
373 |
|
|
* NULL means option not specified. */
|
374 |
|
|
struct TkTextTabArray *tabArrayPtr;
|
375 |
|
|
/* Info about tabs for tag (malloc-ed)
|
376 |
|
|
* or NULL. Corresponds to tabString. */
|
377 |
|
|
char *underlineString; /* -underline option string (malloc-ed).
|
378 |
|
|
* NULL means option not specified. */
|
379 |
|
|
int underline; /* Non-zero means draw underline underneath
|
380 |
|
|
* text. Only valid if underlineString is
|
381 |
|
|
* non-NULL. */
|
382 |
|
|
TkWrapMode wrapMode; /* How to handle wrap-around for this tag.
|
383 |
|
|
* Must be TEXT_WRAPMODE_CHAR,
|
384 |
|
|
* TEXT_WRAPMODE_NONE, TEXT_WRAPMODE_WORD,
|
385 |
|
|
* or TEXT_WRAPMODE_NULL to use wrapmode for
|
386 |
|
|
* whole widget. */
|
387 |
|
|
char *elideString; /* -elide option string (malloc-ed).
|
388 |
|
|
* NULL means option not specified. */
|
389 |
|
|
int elide; /* Non-zero means that data under this tag
|
390 |
|
|
* should not be displayed. */
|
391 |
|
|
int affectsDisplay; /* Non-zero means that this tag affects the
|
392 |
|
|
* way information is displayed on the screen
|
393 |
|
|
* (so need to redisplay if tag changes). */
|
394 |
|
|
} TkTextTag;
|
395 |
|
|
|
396 |
|
|
#define TK_TAG_AFFECTS_DISPLAY 0x1
|
397 |
|
|
#define TK_TAG_UNDERLINE 0x2
|
398 |
|
|
#define TK_TAG_JUSTIFY 0x4
|
399 |
|
|
#define TK_TAG_OFFSET 0x10
|
400 |
|
|
|
401 |
|
|
/*
|
402 |
|
|
* The data structure below is used for searching a B-tree for transitions
|
403 |
|
|
* on a single tag (or for all tag transitions). No code outside of
|
404 |
|
|
* tkTextBTree.c should ever modify any of the fields in these structures,
|
405 |
|
|
* but it's OK to use them for read-only information.
|
406 |
|
|
*/
|
407 |
|
|
|
408 |
|
|
typedef struct TkTextSearch {
|
409 |
|
|
TkTextIndex curIndex; /* Position of last tag transition
|
410 |
|
|
* returned by TkBTreeNextTag, or
|
411 |
|
|
* index of start of segment
|
412 |
|
|
* containing starting position for
|
413 |
|
|
* search if TkBTreeNextTag hasn't
|
414 |
|
|
* been called yet, or same as
|
415 |
|
|
* stopIndex if search is over. */
|
416 |
|
|
TkTextSegment *segPtr; /* Actual tag segment returned by last
|
417 |
|
|
* call to TkBTreeNextTag, or NULL if
|
418 |
|
|
* TkBTreeNextTag hasn't returned
|
419 |
|
|
* anything yet. */
|
420 |
|
|
TkTextSegment *nextPtr; /* Where to resume search in next
|
421 |
|
|
* call to TkBTreeNextTag. */
|
422 |
|
|
TkTextSegment *lastPtr; /* Stop search before just before
|
423 |
|
|
* considering this segment. */
|
424 |
|
|
TkTextTag *tagPtr; /* Tag to search for (or tag found, if
|
425 |
|
|
* allTags is non-zero). */
|
426 |
|
|
int linesLeft; /* Lines left to search (including
|
427 |
|
|
* curIndex and stopIndex). When
|
428 |
|
|
* this becomes <= 0 the search is
|
429 |
|
|
* over. */
|
430 |
|
|
int allTags; /* Non-zero means ignore tag check:
|
431 |
|
|
* search for transitions on all
|
432 |
|
|
* tags. */
|
433 |
|
|
} TkTextSearch;
|
434 |
|
|
|
435 |
|
|
/*
|
436 |
|
|
* The following data structure describes a single tab stop.
|
437 |
|
|
*/
|
438 |
|
|
|
439 |
|
|
typedef enum {LEFT, RIGHT, CENTER, NUMERIC} TkTextTabAlign;
|
440 |
|
|
|
441 |
|
|
typedef struct TkTextTab {
|
442 |
|
|
int location; /* Offset in pixels of this tab stop
|
443 |
|
|
* from the left margin (lmargin2) of
|
444 |
|
|
* the text. */
|
445 |
|
|
TkTextTabAlign alignment; /* Where the tab stop appears relative
|
446 |
|
|
* to the text. */
|
447 |
|
|
} TkTextTab;
|
448 |
|
|
|
449 |
|
|
typedef struct TkTextTabArray {
|
450 |
|
|
int numTabs; /* Number of tab stops. */
|
451 |
|
|
TkTextTab tabs[1]; /* Array of tabs. The actual size
|
452 |
|
|
* will be numTabs. THIS FIELD MUST
|
453 |
|
|
* BE THE LAST IN THE STRUCTURE. */
|
454 |
|
|
} TkTextTabArray;
|
455 |
|
|
|
456 |
|
|
/*
|
457 |
|
|
* A data structure of the following type is kept for each text widget that
|
458 |
|
|
* currently exists for this process:
|
459 |
|
|
*/
|
460 |
|
|
|
461 |
|
|
typedef struct TkText {
|
462 |
|
|
Tk_Window tkwin; /* Window that embodies the text. NULL
|
463 |
|
|
* means that the window has been destroyed
|
464 |
|
|
* but the data structures haven't yet been
|
465 |
|
|
* cleaned up.*/
|
466 |
|
|
Display *display; /* Display for widget. Needed, among other
|
467 |
|
|
* things, to allow resources to be freed
|
468 |
|
|
* even after tkwin has gone away. */
|
469 |
|
|
Tcl_Interp *interp; /* Interpreter associated with widget. Used
|
470 |
|
|
* to delete widget command. */
|
471 |
|
|
Tcl_Command widgetCmd; /* Token for text's widget command. */
|
472 |
|
|
TkTextBTree tree; /* B-tree representation of text and tags for
|
473 |
|
|
* widget. */
|
474 |
|
|
Tcl_HashTable tagTable; /* Hash table that maps from tag names to
|
475 |
|
|
* pointers to TkTextTag structures. */
|
476 |
|
|
int numTags; /* Number of tags currently defined for
|
477 |
|
|
* widget; needed to keep track of
|
478 |
|
|
* priorities. */
|
479 |
|
|
Tcl_HashTable markTable; /* Hash table that maps from mark names to
|
480 |
|
|
* pointers to mark segments. */
|
481 |
|
|
Tcl_HashTable windowTable; /* Hash table that maps from window names
|
482 |
|
|
* to pointers to window segments. If a
|
483 |
|
|
* window segment doesn't yet have an
|
484 |
|
|
* associated window, there is no entry for
|
485 |
|
|
* it here. */
|
486 |
|
|
Tcl_HashTable imageTable; /* Hash table that maps from image names
|
487 |
|
|
* to pointers to image segments. If an
|
488 |
|
|
* image segment doesn't yet have an
|
489 |
|
|
* associated image, there is no entry for
|
490 |
|
|
* it here. */
|
491 |
|
|
int state; /* Either STATE_NORMAL or STATE_DISABLED. A
|
492 |
|
|
* text widget is read-only when disabled. */
|
493 |
|
|
|
494 |
|
|
/*
|
495 |
|
|
* Default information for displaying (may be overridden by tags
|
496 |
|
|
* applied to ranges of characters).
|
497 |
|
|
*/
|
498 |
|
|
|
499 |
|
|
Tk_3DBorder border; /* Structure used to draw 3-D border and
|
500 |
|
|
* default background. */
|
501 |
|
|
int borderWidth; /* Width of 3-D border to draw around entire
|
502 |
|
|
* widget. */
|
503 |
|
|
int padX, padY; /* Padding between text and window border. */
|
504 |
|
|
int relief; /* 3-d effect for border around entire
|
505 |
|
|
* widget: TK_RELIEF_RAISED etc. */
|
506 |
|
|
int highlightWidth; /* Width in pixels of highlight to draw
|
507 |
|
|
* around widget when it has the focus.
|
508 |
|
|
* <= 0 means don't draw a highlight. */
|
509 |
|
|
XColor *highlightBgColorPtr;
|
510 |
|
|
/* Color for drawing traversal highlight
|
511 |
|
|
* area when highlight is off. */
|
512 |
|
|
XColor *highlightColorPtr; /* Color for drawing traversal highlight. */
|
513 |
|
|
Tk_Cursor cursor; /* Current cursor for window, or None. */
|
514 |
|
|
XColor *fgColor; /* Default foreground color for text. */
|
515 |
|
|
Tk_Font tkfont; /* Default font for displaying text. */
|
516 |
|
|
int charWidth; /* Width of average character in default
|
517 |
|
|
* font. */
|
518 |
|
|
int spacing1; /* Default extra spacing above first display
|
519 |
|
|
* line for each text line. */
|
520 |
|
|
int spacing2; /* Default extra spacing between display lines
|
521 |
|
|
* for the same text line. */
|
522 |
|
|
int spacing3; /* Default extra spacing below last display
|
523 |
|
|
* line for each text line. */
|
524 |
|
|
char *tabOptionString; /* Value of -tabs option string (malloc'ed). */
|
525 |
|
|
TkTextTabArray *tabArrayPtr;
|
526 |
|
|
/* Information about tab stops (malloc'ed).
|
527 |
|
|
* NULL means perform default tabbing
|
528 |
|
|
* behavior. */
|
529 |
|
|
|
530 |
|
|
/*
|
531 |
|
|
* Additional information used for displaying:
|
532 |
|
|
*/
|
533 |
|
|
|
534 |
|
|
TkWrapMode wrapMode; /* How to handle wrap-around. Must be
|
535 |
|
|
* TEXT_WRAPMODE_CHAR, TEXT_WRAPMODE_NONE, or
|
536 |
|
|
* TEXT_WRAPMODE_WORD. */
|
537 |
|
|
int width, height; /* Desired dimensions for window, measured
|
538 |
|
|
* in characters. */
|
539 |
|
|
int setGrid; /* Non-zero means pass gridding information
|
540 |
|
|
* to window manager. */
|
541 |
|
|
int prevWidth, prevHeight; /* Last known dimensions of window; used to
|
542 |
|
|
* detect changes in size. */
|
543 |
|
|
TkTextIndex topIndex; /* Identifies first character in top display
|
544 |
|
|
* line of window. */
|
545 |
|
|
struct TextDInfo *dInfoPtr; /* Information maintained by tkTextDisp.c. */
|
546 |
|
|
|
547 |
|
|
/*
|
548 |
|
|
* Information related to selection.
|
549 |
|
|
*/
|
550 |
|
|
|
551 |
|
|
TkTextTag *selTagPtr; /* Pointer to "sel" tag. Used to tell when
|
552 |
|
|
* a new selection has been made. */
|
553 |
|
|
Tk_3DBorder selBorder; /* Border and background for selected
|
554 |
|
|
* characters. This is a copy of information
|
555 |
|
|
* in *cursorTagPtr, so it shouldn't be
|
556 |
|
|
* explicitly freed. */
|
557 |
|
|
char *selBdString; /* Value of -selectborderwidth option, or NULL
|
558 |
|
|
* if not specified (malloc'ed). */
|
559 |
|
|
XColor *selFgColorPtr; /* Foreground color for selected text.
|
560 |
|
|
* This is a copy of information in
|
561 |
|
|
* *cursorTagPtr, so it shouldn't be
|
562 |
|
|
* explicitly freed. */
|
563 |
|
|
int exportSelection; /* Non-zero means tie "sel" tag to X
|
564 |
|
|
* selection. */
|
565 |
|
|
TkTextIndex selIndex; /* Used during multi-pass selection retrievals.
|
566 |
|
|
* This index identifies the next character
|
567 |
|
|
* to be returned from the selection. */
|
568 |
|
|
int abortSelections; /* Set to 1 whenever the text is modified
|
569 |
|
|
* in a way that interferes with selection
|
570 |
|
|
* retrieval: used to abort incremental
|
571 |
|
|
* selection retrievals. */
|
572 |
|
|
int selOffset; /* Offset in selection corresponding to
|
573 |
|
|
* selLine and selCh. -1 means neither
|
574 |
|
|
* this information nor selIndex is of any
|
575 |
|
|
* use. */
|
576 |
|
|
|
577 |
|
|
/*
|
578 |
|
|
* Information related to insertion cursor:
|
579 |
|
|
*/
|
580 |
|
|
|
581 |
|
|
TkTextSegment *insertMarkPtr;
|
582 |
|
|
/* Points to segment for "insert" mark. */
|
583 |
|
|
Tk_3DBorder insertBorder; /* Used to draw vertical bar for insertion
|
584 |
|
|
* cursor. */
|
585 |
|
|
int insertWidth; /* Total width of insert cursor. */
|
586 |
|
|
int insertBorderWidth; /* Width of 3-D border around insert cursor. */
|
587 |
|
|
int insertOnTime; /* Number of milliseconds cursor should spend
|
588 |
|
|
* in "on" state for each blink. */
|
589 |
|
|
int insertOffTime; /* Number of milliseconds cursor should spend
|
590 |
|
|
* in "off" state for each blink. */
|
591 |
|
|
Tcl_TimerToken insertBlinkHandler;
|
592 |
|
|
/* Timer handler used to blink cursor on and
|
593 |
|
|
* off. */
|
594 |
|
|
|
595 |
|
|
/*
|
596 |
|
|
* Information used for event bindings associated with tags:
|
597 |
|
|
*/
|
598 |
|
|
|
599 |
|
|
Tk_BindingTable bindingTable;
|
600 |
|
|
/* Table of all bindings currently defined
|
601 |
|
|
* for this widget. NULL means that no
|
602 |
|
|
* bindings exist, so the table hasn't been
|
603 |
|
|
* created. Each "object" used for this
|
604 |
|
|
* table is the address of a tag. */
|
605 |
|
|
TkTextSegment *currentMarkPtr;
|
606 |
|
|
/* Pointer to segment for "current" mark,
|
607 |
|
|
* or NULL if none. */
|
608 |
|
|
XEvent pickEvent; /* The event from which the current character
|
609 |
|
|
* was chosen. Must be saved so that we
|
610 |
|
|
* can repick after modifications to the
|
611 |
|
|
* text. */
|
612 |
|
|
int numCurTags; /* Number of tags associated with character
|
613 |
|
|
* at current mark. */
|
614 |
|
|
TkTextTag **curTagArrayPtr; /* Pointer to array of tags for current
|
615 |
|
|
* mark, or NULL if none. */
|
616 |
|
|
|
617 |
|
|
/*
|
618 |
|
|
* Miscellaneous additional information:
|
619 |
|
|
*/
|
620 |
|
|
|
621 |
|
|
char *takeFocus; /* Value of -takeFocus option; not used in
|
622 |
|
|
* the C code, but used by keyboard traversal
|
623 |
|
|
* scripts. Malloc'ed, but may be NULL. */
|
624 |
|
|
char *xScrollCmd; /* Prefix of command to issue to update
|
625 |
|
|
* horizontal scrollbar when view changes. */
|
626 |
|
|
char *yScrollCmd; /* Prefix of command to issue to update
|
627 |
|
|
* vertical scrollbar when view changes. */
|
628 |
|
|
int flags; /* Miscellaneous flags; see below for
|
629 |
|
|
* definitions. */
|
630 |
|
|
} TkText;
|
631 |
|
|
|
632 |
|
|
/*
|
633 |
|
|
* Flag values for TkText records:
|
634 |
|
|
*
|
635 |
|
|
* GOT_SELECTION: Non-zero means we've already claimed the
|
636 |
|
|
* selection.
|
637 |
|
|
* INSERT_ON: Non-zero means insertion cursor should be
|
638 |
|
|
* displayed on screen.
|
639 |
|
|
* GOT_FOCUS: Non-zero means this window has the input
|
640 |
|
|
* focus.
|
641 |
|
|
* BUTTON_DOWN: 1 means that a mouse button is currently
|
642 |
|
|
* down; this is used to implement grabs
|
643 |
|
|
* for the duration of button presses.
|
644 |
|
|
* UPDATE_SCROLLBARS: Non-zero means scrollbar(s) should be updated
|
645 |
|
|
* during next redisplay operation.
|
646 |
|
|
*/
|
647 |
|
|
|
648 |
|
|
#define GOT_SELECTION 1
|
649 |
|
|
#define INSERT_ON 2
|
650 |
|
|
#define GOT_FOCUS 4
|
651 |
|
|
#define BUTTON_DOWN 8
|
652 |
|
|
#define UPDATE_SCROLLBARS 0x10
|
653 |
|
|
#define NEED_REPICK 0x20
|
654 |
|
|
|
655 |
|
|
/*
|
656 |
|
|
* Records of the following type define segment types in terms of
|
657 |
|
|
* a collection of procedures that may be called to manipulate
|
658 |
|
|
* segments of that type.
|
659 |
|
|
*/
|
660 |
|
|
|
661 |
|
|
typedef TkTextSegment * Tk_SegSplitProc _ANSI_ARGS_((
|
662 |
|
|
struct TkTextSegment *segPtr, int index));
|
663 |
|
|
typedef int Tk_SegDeleteProc _ANSI_ARGS_((
|
664 |
|
|
struct TkTextSegment *segPtr,
|
665 |
|
|
TkTextLine *linePtr, int treeGone));
|
666 |
|
|
typedef TkTextSegment * Tk_SegCleanupProc _ANSI_ARGS_((
|
667 |
|
|
struct TkTextSegment *segPtr, TkTextLine *linePtr));
|
668 |
|
|
typedef void Tk_SegLineChangeProc _ANSI_ARGS_((
|
669 |
|
|
struct TkTextSegment *segPtr, TkTextLine *linePtr));
|
670 |
|
|
typedef int Tk_SegLayoutProc _ANSI_ARGS_((struct TkText *textPtr,
|
671 |
|
|
struct TkTextIndex *indexPtr, TkTextSegment *segPtr,
|
672 |
|
|
int offset, int maxX, int maxChars,
|
673 |
|
|
int noCharsYet, TkWrapMode wrapMode,
|
674 |
|
|
struct TkTextDispChunk *chunkPtr));
|
675 |
|
|
typedef void Tk_SegCheckProc _ANSI_ARGS_((TkTextSegment *segPtr,
|
676 |
|
|
TkTextLine *linePtr));
|
677 |
|
|
|
678 |
|
|
typedef struct Tk_SegType {
|
679 |
|
|
char *name; /* Name of this kind of segment. */
|
680 |
|
|
int leftGravity; /* If a segment has zero size (e.g. a
|
681 |
|
|
* mark or tag toggle), does it
|
682 |
|
|
* attach to character to its left
|
683 |
|
|
* or right? 1 means left, 0 means
|
684 |
|
|
* right. */
|
685 |
|
|
Tk_SegSplitProc *splitProc; /* Procedure to split large segment
|
686 |
|
|
* into two smaller ones. */
|
687 |
|
|
Tk_SegDeleteProc *deleteProc; /* Procedure to call to delete
|
688 |
|
|
* segment. */
|
689 |
|
|
Tk_SegCleanupProc *cleanupProc; /* After any change to a line, this
|
690 |
|
|
* procedure is invoked for all
|
691 |
|
|
* segments left in the line to
|
692 |
|
|
* perform any cleanup they wish
|
693 |
|
|
* (e.g. joining neighboring
|
694 |
|
|
* segments). */
|
695 |
|
|
Tk_SegLineChangeProc *lineChangeProc;
|
696 |
|
|
/* Invoked when a segment is about
|
697 |
|
|
* to be moved from its current line
|
698 |
|
|
* to an earlier line because of
|
699 |
|
|
* a deletion. The linePtr is that
|
700 |
|
|
* for the segment's old line.
|
701 |
|
|
* CleanupProc will be invoked after
|
702 |
|
|
* the deletion is finished. */
|
703 |
|
|
Tk_SegLayoutProc *layoutProc; /* Returns size information when
|
704 |
|
|
* figuring out what to display in
|
705 |
|
|
* window. */
|
706 |
|
|
Tk_SegCheckProc *checkProc; /* Called during consistency checks
|
707 |
|
|
* to check internal consistency of
|
708 |
|
|
* segment. */
|
709 |
|
|
} Tk_SegType;
|
710 |
|
|
|
711 |
|
|
/*
|
712 |
|
|
* The constant below is used to specify a line when what is really
|
713 |
|
|
* wanted is the entire text. For now, just use a very big number.
|
714 |
|
|
*/
|
715 |
|
|
|
716 |
|
|
#define TK_END_OF_TEXT 1000000
|
717 |
|
|
|
718 |
|
|
/*
|
719 |
|
|
* The following definition specifies the maximum number of characters
|
720 |
|
|
* needed in a string to hold a position specifier.
|
721 |
|
|
*/
|
722 |
|
|
|
723 |
|
|
#define TK_POS_CHARS 30
|
724 |
|
|
|
725 |
|
|
/*
|
726 |
|
|
* Declarations for variables shared among the text-related files:
|
727 |
|
|
*/
|
728 |
|
|
|
729 |
|
|
extern int tkBTreeDebug;
|
730 |
|
|
extern int tkTextDebug;
|
731 |
|
|
extern Tk_SegType tkTextCharType;
|
732 |
|
|
extern Tk_SegType tkTextLeftMarkType;
|
733 |
|
|
extern Tk_SegType tkTextRightMarkType;
|
734 |
|
|
extern Tk_SegType tkTextToggleOnType;
|
735 |
|
|
extern Tk_SegType tkTextToggleOffType;
|
736 |
|
|
|
737 |
|
|
/*
|
738 |
|
|
* Declarations for procedures that are used by the text-related files
|
739 |
|
|
* but shouldn't be used anywhere else in Tk (or by Tk clients):
|
740 |
|
|
*/
|
741 |
|
|
|
742 |
|
|
extern int TkBTreeCharTagged _ANSI_ARGS_((TkTextIndex *indexPtr,
|
743 |
|
|
TkTextTag *tagPtr));
|
744 |
|
|
extern void TkBTreeCheck _ANSI_ARGS_((TkTextBTree tree));
|
745 |
|
|
extern int TkBTreeCharsInLine _ANSI_ARGS_((TkTextLine *linePtr));
|
746 |
|
|
extern int TkBTreeBytesInLine _ANSI_ARGS_((TkTextLine *linePtr));
|
747 |
|
|
extern TkTextBTree TkBTreeCreate _ANSI_ARGS_((TkText *textPtr));
|
748 |
|
|
extern void TkBTreeDestroy _ANSI_ARGS_((TkTextBTree tree));
|
749 |
|
|
extern void TkBTreeDeleteChars _ANSI_ARGS_((TkTextIndex *index1Ptr,
|
750 |
|
|
TkTextIndex *index2Ptr));
|
751 |
|
|
extern TkTextLine * TkBTreeFindLine _ANSI_ARGS_((TkTextBTree tree,
|
752 |
|
|
int line));
|
753 |
|
|
extern TkTextTag ** TkBTreeGetTags _ANSI_ARGS_((TkTextIndex *indexPtr,
|
754 |
|
|
int *numTagsPtr));
|
755 |
|
|
extern void TkBTreeInsertChars _ANSI_ARGS_((TkTextIndex *indexPtr,
|
756 |
|
|
char *string));
|
757 |
|
|
extern int TkBTreeLineIndex _ANSI_ARGS_((TkTextLine *linePtr));
|
758 |
|
|
extern void TkBTreeLinkSegment _ANSI_ARGS_((TkTextSegment *segPtr,
|
759 |
|
|
TkTextIndex *indexPtr));
|
760 |
|
|
extern TkTextLine * TkBTreeNextLine _ANSI_ARGS_((TkTextLine *linePtr));
|
761 |
|
|
extern int TkBTreeNextTag _ANSI_ARGS_((TkTextSearch *searchPtr));
|
762 |
|
|
extern int TkBTreeNumLines _ANSI_ARGS_((TkTextBTree tree));
|
763 |
|
|
extern TkTextLine * TkBTreePreviousLine _ANSI_ARGS_((TkTextLine *linePtr));
|
764 |
|
|
extern int TkBTreePrevTag _ANSI_ARGS_((TkTextSearch *searchPtr));
|
765 |
|
|
extern void TkBTreeStartSearch _ANSI_ARGS_((TkTextIndex *index1Ptr,
|
766 |
|
|
TkTextIndex *index2Ptr, TkTextTag *tagPtr,
|
767 |
|
|
TkTextSearch *searchPtr));
|
768 |
|
|
extern void TkBTreeStartSearchBack _ANSI_ARGS_((TkTextIndex *index1Ptr,
|
769 |
|
|
TkTextIndex *index2Ptr, TkTextTag *tagPtr,
|
770 |
|
|
TkTextSearch *searchPtr));
|
771 |
|
|
extern void TkBTreeTag _ANSI_ARGS_((TkTextIndex *index1Ptr,
|
772 |
|
|
TkTextIndex *index2Ptr, TkTextTag *tagPtr,
|
773 |
|
|
int add));
|
774 |
|
|
extern void TkBTreeUnlinkSegment _ANSI_ARGS_((TkTextBTree tree,
|
775 |
|
|
TkTextSegment *segPtr, TkTextLine *linePtr));
|
776 |
|
|
extern void TkTextBindProc _ANSI_ARGS_((ClientData clientData,
|
777 |
|
|
XEvent *eventPtr));
|
778 |
|
|
extern void TkTextChanged _ANSI_ARGS_((TkText *textPtr,
|
779 |
|
|
TkTextIndex *index1Ptr, TkTextIndex *index2Ptr));
|
780 |
|
|
extern int TkTextCharBbox _ANSI_ARGS_((TkText *textPtr,
|
781 |
|
|
TkTextIndex *indexPtr, int *xPtr, int *yPtr,
|
782 |
|
|
int *widthPtr, int *heightPtr));
|
783 |
|
|
extern int TkTextCharLayoutProc _ANSI_ARGS_((TkText *textPtr,
|
784 |
|
|
TkTextIndex *indexPtr, TkTextSegment *segPtr,
|
785 |
|
|
int offset, int maxX, int maxChars, int noBreakYet,
|
786 |
|
|
TkWrapMode wrapMode, TkTextDispChunk *chunkPtr));
|
787 |
|
|
extern void TkTextCreateDInfo _ANSI_ARGS_((TkText *textPtr));
|
788 |
|
|
extern int TkTextDLineInfo _ANSI_ARGS_((TkText *textPtr,
|
789 |
|
|
TkTextIndex *indexPtr, int *xPtr, int *yPtr,
|
790 |
|
|
int *widthPtr, int *heightPtr, int *basePtr));
|
791 |
|
|
extern TkTextTag * TkTextCreateTag _ANSI_ARGS_((TkText *textPtr,
|
792 |
|
|
char *tagName));
|
793 |
|
|
extern void TkTextFreeDInfo _ANSI_ARGS_((TkText *textPtr));
|
794 |
|
|
extern void TkTextFreeTag _ANSI_ARGS_((TkText *textPtr,
|
795 |
|
|
TkTextTag *tagPtr));
|
796 |
|
|
extern int TkTextGetIndex _ANSI_ARGS_((Tcl_Interp *interp,
|
797 |
|
|
TkText *textPtr, char *string,
|
798 |
|
|
TkTextIndex *indexPtr));
|
799 |
|
|
extern TkTextTabArray * TkTextGetTabs _ANSI_ARGS_((Tcl_Interp *interp,
|
800 |
|
|
Tk_Window tkwin, char *string));
|
801 |
|
|
extern void TkTextIndexBackBytes _ANSI_ARGS_((
|
802 |
|
|
CONST TkTextIndex *srcPtr, int count,
|
803 |
|
|
TkTextIndex *dstPtr));
|
804 |
|
|
extern void TkTextIndexBackChars _ANSI_ARGS_((
|
805 |
|
|
CONST TkTextIndex *srcPtr, int count,
|
806 |
|
|
TkTextIndex *dstPtr));
|
807 |
|
|
extern int TkTextIndexCmp _ANSI_ARGS_((
|
808 |
|
|
CONST TkTextIndex *index1Ptr,
|
809 |
|
|
CONST TkTextIndex *index2Ptr));
|
810 |
|
|
extern void TkTextIndexForwBytes _ANSI_ARGS_((
|
811 |
|
|
CONST TkTextIndex *srcPtr, int count,
|
812 |
|
|
TkTextIndex *dstPtr));
|
813 |
|
|
extern void TkTextIndexForwChars _ANSI_ARGS_((
|
814 |
|
|
CONST TkTextIndex *srcPtr, int count,
|
815 |
|
|
TkTextIndex *dstPtr));
|
816 |
|
|
extern TkTextSegment * TkTextIndexToSeg _ANSI_ARGS_((
|
817 |
|
|
CONST TkTextIndex *indexPtr, int *offsetPtr));
|
818 |
|
|
extern void TkTextInsertDisplayProc _ANSI_ARGS_((
|
819 |
|
|
TkTextDispChunk *chunkPtr, int x, int y, int height,
|
820 |
|
|
int baseline, Display *display, Drawable dst,
|
821 |
|
|
int screenY));
|
822 |
|
|
extern void TkTextLostSelection _ANSI_ARGS_((
|
823 |
|
|
ClientData clientData));
|
824 |
|
|
extern TkTextIndex * TkTextMakeCharIndex _ANSI_ARGS_((TkTextBTree tree,
|
825 |
|
|
int lineIndex, int charIndex,
|
826 |
|
|
TkTextIndex *indexPtr));
|
827 |
|
|
extern int TkTextIsElided _ANSI_ARGS_((TkText *textPtr,
|
828 |
|
|
TkTextIndex *indexPtr));
|
829 |
|
|
extern TkTextIndex * TkTextMakeByteIndex _ANSI_ARGS_((TkTextBTree tree,
|
830 |
|
|
int lineIndex, int byteIndex,
|
831 |
|
|
TkTextIndex *indexPtr));
|
832 |
|
|
extern int TkTextMarkCmd _ANSI_ARGS_((TkText *textPtr,
|
833 |
|
|
Tcl_Interp *interp, int argc, char **argv));
|
834 |
|
|
extern int TkTextMarkNameToIndex _ANSI_ARGS_((TkText *textPtr,
|
835 |
|
|
char *name, TkTextIndex *indexPtr));
|
836 |
|
|
extern void TkTextMarkSegToIndex _ANSI_ARGS_((TkText *textPtr,
|
837 |
|
|
TkTextSegment *markPtr, TkTextIndex *indexPtr));
|
838 |
|
|
extern void TkTextEventuallyRepick _ANSI_ARGS_((TkText *textPtr));
|
839 |
|
|
extern void TkTextPickCurrent _ANSI_ARGS_((TkText *textPtr,
|
840 |
|
|
XEvent *eventPtr));
|
841 |
|
|
extern void TkTextPixelIndex _ANSI_ARGS_((TkText *textPtr,
|
842 |
|
|
int x, int y, TkTextIndex *indexPtr));
|
843 |
|
|
extern void TkTextPrintIndex _ANSI_ARGS_((
|
844 |
|
|
CONST TkTextIndex *indexPtr, char *string));
|
845 |
|
|
extern void TkTextRedrawRegion _ANSI_ARGS_((TkText *textPtr,
|
846 |
|
|
int x, int y, int width, int height));
|
847 |
|
|
extern void TkTextRedrawTag _ANSI_ARGS_((TkText *textPtr,
|
848 |
|
|
TkTextIndex *index1Ptr, TkTextIndex *index2Ptr,
|
849 |
|
|
TkTextTag *tagPtr, int withTag));
|
850 |
|
|
extern void TkTextRelayoutWindow _ANSI_ARGS_((TkText *textPtr));
|
851 |
|
|
extern int TkTextScanCmd _ANSI_ARGS_((TkText *textPtr,
|
852 |
|
|
Tcl_Interp *interp, int argc, char **argv));
|
853 |
|
|
extern int TkTextSeeCmd _ANSI_ARGS_((TkText *textPtr,
|
854 |
|
|
Tcl_Interp *interp, int argc, char **argv));
|
855 |
|
|
extern int TkTextSegToOffset _ANSI_ARGS_((
|
856 |
|
|
CONST TkTextSegment *segPtr,
|
857 |
|
|
CONST TkTextLine *linePtr));
|
858 |
|
|
extern TkTextSegment * TkTextSetMark _ANSI_ARGS_((TkText *textPtr, char *name,
|
859 |
|
|
TkTextIndex *indexPtr));
|
860 |
|
|
extern void TkTextSetYView _ANSI_ARGS_((TkText *textPtr,
|
861 |
|
|
TkTextIndex *indexPtr, int pickPlace));
|
862 |
|
|
extern int TkTextTagCmd _ANSI_ARGS_((TkText *textPtr,
|
863 |
|
|
Tcl_Interp *interp, int argc, char **argv));
|
864 |
|
|
extern int TkTextImageCmd _ANSI_ARGS_((TkText *textPtr,
|
865 |
|
|
Tcl_Interp *interp, int argc, char **argv));
|
866 |
|
|
extern int TkTextImageIndex _ANSI_ARGS_((TkText *textPtr,
|
867 |
|
|
char *name, TkTextIndex *indexPtr));
|
868 |
|
|
extern int TkTextWindowCmd _ANSI_ARGS_((TkText *textPtr,
|
869 |
|
|
Tcl_Interp *interp, int argc, char **argv));
|
870 |
|
|
extern int TkTextWindowIndex _ANSI_ARGS_((TkText *textPtr,
|
871 |
|
|
char *name, TkTextIndex *indexPtr));
|
872 |
|
|
extern int TkTextXviewCmd _ANSI_ARGS_((TkText *textPtr,
|
873 |
|
|
Tcl_Interp *interp, int argc, char **argv));
|
874 |
|
|
extern int TkTextYviewCmd _ANSI_ARGS_((TkText *textPtr,
|
875 |
|
|
Tcl_Interp *interp, int argc, char **argv));
|
876 |
|
|
|
877 |
|
|
# undef TCL_STORAGE_CLASS
|
878 |
|
|
# define TCL_STORAGE_CLASS DLLIMPORT
|
879 |
|
|
|
880 |
|
|
#endif /* _TKTEXT */
|
881 |
|
|
|
882 |
dashley |
69 |
/* End of tktext.h */
|