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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tktextimage.c,v 1.1.1.1 2001/06/13 05:10:24 dtashley Exp $ */
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/*
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* tkImage.c --
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*
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* This file contains code that allows images to be
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* nested inside text widgets. It also implements the "image"
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* widget command for texts.
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*
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* Copyright (c) 1997 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: tktextimage.c,v 1.1.1.1 2001/06/13 05:10:24 dtashley Exp $
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*/
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#include "tk.h"
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#include "tkText.h"
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#include "tkPort.h"
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/*
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* Definitions for alignment values:
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*/
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#define ALIGN_BOTTOM 0
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#define ALIGN_CENTER 1
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#define ALIGN_TOP 2
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#define ALIGN_BASELINE 3
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/*
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* Macro that determines the size of an embedded image segment:
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*/
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#define EI_SEG_SIZE ((unsigned) (Tk_Offset(TkTextSegment, body) \
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+ sizeof(TkTextEmbImage)))
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/*
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* Prototypes for procedures defined in this file:
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*/
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static int AlignParseProc _ANSI_ARGS_((ClientData clientData,
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Tcl_Interp *interp, Tk_Window tkwin, char *value,
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char *widgRec, int offset));
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static char * AlignPrintProc _ANSI_ARGS_((ClientData clientData,
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Tk_Window tkwin, char *widgRec, int offset,
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Tcl_FreeProc **freeProcPtr));
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static TkTextSegment * EmbImageCleanupProc _ANSI_ARGS_((TkTextSegment *segPtr,
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TkTextLine *linePtr));
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static void EmbImageCheckProc _ANSI_ARGS_((TkTextSegment *segPtr,
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TkTextLine *linePtr));
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static void EmbImageBboxProc _ANSI_ARGS_((TkTextDispChunk *chunkPtr,
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int index, int y, int lineHeight, int baseline,
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int *xPtr, int *yPtr, int *widthPtr,
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int *heightPtr));
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static int EmbImageConfigure _ANSI_ARGS_((TkText *textPtr,
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TkTextSegment *eiPtr, int argc, char **argv));
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static int EmbImageDeleteProc _ANSI_ARGS_((TkTextSegment *segPtr,
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TkTextLine *linePtr, int treeGone));
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static void EmbImageDisplayProc _ANSI_ARGS_((
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TkTextDispChunk *chunkPtr, int x, int y,
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int lineHeight, int baseline, Display *display,
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Drawable dst, int screenY));
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static int EmbImageLayoutProc _ANSI_ARGS_((TkText *textPtr,
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TkTextIndex *indexPtr, TkTextSegment *segPtr,
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int offset, int maxX, int maxChars,
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int noCharsYet, TkWrapMode wrapMode,
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TkTextDispChunk *chunkPtr));
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static void EmbImageProc _ANSI_ARGS_((ClientData clientData,
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int x, int y, int width, int height,
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int imageWidth, int imageHeight));
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/*
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* The following structure declares the "embedded image" segment type.
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*/
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static Tk_SegType tkTextEmbImageType = {
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"image", /* name */
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0, /* leftGravity */
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(Tk_SegSplitProc *) NULL, /* splitProc */
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EmbImageDeleteProc, /* deleteProc */
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EmbImageCleanupProc, /* cleanupProc */
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(Tk_SegLineChangeProc *) NULL, /* lineChangeProc */
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EmbImageLayoutProc, /* layoutProc */
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EmbImageCheckProc /* checkProc */
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};
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/*
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* Information used for parsing image configuration options:
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*/
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static Tk_CustomOption alignOption = {AlignParseProc, AlignPrintProc,
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(ClientData) NULL};
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static Tk_ConfigSpec configSpecs[] = {
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{TK_CONFIG_CUSTOM, "-align", (char *) NULL, (char *) NULL,
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"center", 0, TK_CONFIG_DONT_SET_DEFAULT, &alignOption},
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{TK_CONFIG_PIXELS, "-padx", (char *) NULL, (char *) NULL,
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"0", Tk_Offset(TkTextEmbImage, padX),
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TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_PIXELS, "-pady", (char *) NULL, (char *) NULL,
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"0", Tk_Offset(TkTextEmbImage, padY),
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TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_STRING, "-image", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(TkTextEmbImage, imageString),
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TK_CONFIG_DONT_SET_DEFAULT|TK_CONFIG_NULL_OK},
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{TK_CONFIG_STRING, "-name", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(TkTextEmbImage, imageName),
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TK_CONFIG_DONT_SET_DEFAULT|TK_CONFIG_NULL_OK},
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{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
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(char *) NULL, 0, 0}
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};
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/*
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*--------------------------------------------------------------
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*
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* TkTextImageCmd --
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*
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* This procedure implements the "image" widget command
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* for text widgets. See the user documentation for details
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* on what it does.
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*
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* Results:
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* A standard Tcl result or error.
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*
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* Side effects:
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* See the user documentation.
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*
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*--------------------------------------------------------------
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*/
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int
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TkTextImageCmd(textPtr, interp, argc, argv)
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register TkText *textPtr; /* Information about text widget. */
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Tcl_Interp *interp; /* Current interpreter. */
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int argc; /* Number of arguments. */
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char **argv; /* Argument strings. Someone else has already
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* parsed this command enough to know that
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* argv[1] is "image". */
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{
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size_t length;
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register TkTextSegment *eiPtr;
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if (argc < 3) {
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Tcl_AppendResult(interp, "wrong # args: should be \"",
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argv[0], " image option ?arg arg ...?\"", (char *) NULL);
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return TCL_ERROR;
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}
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length = strlen(argv[2]);
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if ((strncmp(argv[2], "cget", length) == 0) && (length >= 2)) {
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TkTextIndex index;
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TkTextSegment *eiPtr;
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if (argc != 5) {
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Tcl_AppendResult(interp, "wrong # args: should be \"",
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argv[0], " image cget index option\"",
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(char *) NULL);
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return TCL_ERROR;
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}
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if (TkTextGetIndex(interp, textPtr, argv[3], &index) != TCL_OK) {
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return TCL_ERROR;
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}
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eiPtr = TkTextIndexToSeg(&index, (int *) NULL);
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if (eiPtr->typePtr != &tkTextEmbImageType) {
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Tcl_AppendResult(interp, "no embedded image at index \"",
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argv[3], "\"", (char *) NULL);
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return TCL_ERROR;
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}
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return Tk_ConfigureValue(interp, textPtr->tkwin, configSpecs,
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(char *) &eiPtr->body.ei, argv[4], 0);
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} else if ((strncmp(argv[2], "configure", length) == 0) && (length >= 2)) {
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TkTextIndex index;
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TkTextSegment *eiPtr;
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if (argc < 4) {
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Tcl_AppendResult(interp, "wrong # args: should be \"",
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argv[0], " image configure index ?option value ...?\"",
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(char *) NULL);
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return TCL_ERROR;
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}
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if (TkTextGetIndex(interp, textPtr, argv[3], &index) != TCL_OK) {
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return TCL_ERROR;
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}
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eiPtr = TkTextIndexToSeg(&index, (int *) NULL);
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if (eiPtr->typePtr != &tkTextEmbImageType) {
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Tcl_AppendResult(interp, "no embedded image at index \"",
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argv[3], "\"", (char *) NULL);
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return TCL_ERROR;
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}
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if (argc == 4) {
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return Tk_ConfigureInfo(interp, textPtr->tkwin, configSpecs,
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(char *) &eiPtr->body.ei, (char *) NULL, 0);
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} else if (argc == 5) {
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return Tk_ConfigureInfo(interp, textPtr->tkwin, configSpecs,
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(char *) &eiPtr->body.ei, argv[4], 0);
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} else {
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TkTextChanged(textPtr, &index, &index);
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return EmbImageConfigure(textPtr, eiPtr, argc-4, argv+4);
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}
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} else if ((strncmp(argv[2], "create", length) == 0) && (length >= 2)) {
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TkTextIndex index;
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int lineIndex;
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/*
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* Add a new image. Find where to put the new image, and
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* mark that position for redisplay.
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*/
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if (argc < 4) {
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Tcl_AppendResult(interp, "wrong # args: should be \"",
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argv[0], " image create index ?option value ...?\"",
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(char *) NULL);
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return TCL_ERROR;
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}
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if (TkTextGetIndex(interp, textPtr, argv[3], &index) != TCL_OK) {
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return TCL_ERROR;
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}
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/*
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* Don't allow insertions on the last (dummy) line of the text.
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*/
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lineIndex = TkBTreeLineIndex(index.linePtr);
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if (lineIndex == TkBTreeNumLines(textPtr->tree)) {
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lineIndex--;
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TkTextMakeByteIndex(textPtr->tree, lineIndex, 1000000, &index);
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}
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/*
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* Create the new image segment and initialize it.
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*/
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eiPtr = (TkTextSegment *) ckalloc(EI_SEG_SIZE);
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eiPtr->typePtr = &tkTextEmbImageType;
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eiPtr->size = 1;
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eiPtr->body.ei.textPtr = textPtr;
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eiPtr->body.ei.linePtr = NULL;
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eiPtr->body.ei.imageName = NULL;
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eiPtr->body.ei.imageString = NULL;
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eiPtr->body.ei.name = NULL;
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eiPtr->body.ei.image = NULL;
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eiPtr->body.ei.align = ALIGN_CENTER;
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eiPtr->body.ei.padX = eiPtr->body.ei.padY = 0;
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eiPtr->body.ei.chunkCount = 0;
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/*
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* Link the segment into the text widget, then configure it (delete
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* it again if the configuration fails).
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*/
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TkTextChanged(textPtr, &index, &index);
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TkBTreeLinkSegment(eiPtr, &index);
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if (EmbImageConfigure(textPtr, eiPtr, argc-4, argv+4) != TCL_OK) {
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TkTextIndex index2;
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TkTextIndexForwChars(&index, 1, &index2);
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TkBTreeDeleteChars(&index, &index2);
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return TCL_ERROR;
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}
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} else if (strncmp(argv[2], "names", length) == 0) {
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Tcl_HashSearch search;
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Tcl_HashEntry *hPtr;
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if (argc != 3) {
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Tcl_AppendResult(interp, "wrong # args: should be \"",
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argv[0], " image names\"", (char *) NULL);
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return TCL_ERROR;
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}
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for (hPtr = Tcl_FirstHashEntry(&textPtr->imageTable, &search);
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hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
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Tcl_AppendElement(interp,
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Tcl_GetHashKey(&textPtr->markTable, hPtr));
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}
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} else {
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Tcl_AppendResult(interp, "bad image option \"", argv[2],
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"\": must be cget, configure, create, or names",
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(char *) NULL);
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return TCL_ERROR;
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}
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return TCL_OK;
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}
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/*
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284 |
*--------------------------------------------------------------
|
285 |
*
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286 |
* EmbImageConfigure --
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*
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* This procedure is called to handle configuration options
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* for an embedded image, using an argc/argv list.
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*
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* Results:
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* The return value is a standard Tcl result. If TCL_ERROR is
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* returned, then the interp's result contains an error message..
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*
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* Side effects:
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* Configuration information for the embedded image changes,
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* such as alignment, or name of the image.
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*
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*--------------------------------------------------------------
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*/
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301 |
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static int
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EmbImageConfigure(textPtr, eiPtr, argc, argv)
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TkText *textPtr; /* Information about text widget that
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* contains embedded image. */
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306 |
TkTextSegment *eiPtr; /* Embedded image to be configured. */
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int argc; /* Number of strings in argv. */
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308 |
char **argv; /* Array of strings describing configuration
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309 |
* options. */
|
310 |
{
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311 |
Tk_Image image;
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312 |
Tcl_DString newName;
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313 |
Tcl_HashEntry *hPtr;
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Tcl_HashSearch search;
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315 |
int new;
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316 |
char *name;
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317 |
int count = 0; /* The counter for picking a unique name */
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318 |
int conflict = 0; /* True if we have a name conflict */
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319 |
unsigned int len; /* length of image name */
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320 |
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321 |
if (Tk_ConfigureWidget(textPtr->interp, textPtr->tkwin, configSpecs,
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argc, argv, (char *) &eiPtr->body.ei,TK_CONFIG_ARGV_ONLY)
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!= TCL_OK) {
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324 |
return TCL_ERROR;
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325 |
}
|
326 |
|
327 |
/*
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328 |
* Create the image. Save the old image around and don't free it
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329 |
* until after the new one is allocated. This keeps the reference
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* count from going to zero so the image doesn't have to be recreated
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* if it hasn't changed.
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*/
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if (eiPtr->body.ei.imageString != NULL) {
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image = Tk_GetImage(textPtr->interp, textPtr->tkwin, eiPtr->body.ei.imageString,
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EmbImageProc, (ClientData) eiPtr);
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if (image == NULL) {
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return TCL_ERROR;
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339 |
}
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340 |
} else {
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image = NULL;
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342 |
}
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343 |
if (eiPtr->body.ei.image != NULL) {
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344 |
Tk_FreeImage(eiPtr->body.ei.image);
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}
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eiPtr->body.ei.image = image;
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347 |
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348 |
if (eiPtr->body.ei.name != NULL) {
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349 |
return TCL_OK;
|
350 |
}
|
351 |
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352 |
/*
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* Find a unique name for this image. Use imageName (or imageString)
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354 |
* if available, otherwise tack on a #nn and use it. If a name is already
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* associated with this image, delete the name.
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*/
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357 |
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358 |
name = eiPtr->body.ei.imageName;
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359 |
if (name == NULL) {
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360 |
name = eiPtr->body.ei.imageString;
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}
|
362 |
if (name == NULL) {
|
363 |
Tcl_AppendResult(textPtr->interp,"Either a \"-name\" ",
|
364 |
"or a \"-image\" argument must be provided ",
|
365 |
"to the \"image create\" subcommand.",
|
366 |
(char *) NULL);
|
367 |
return TCL_ERROR;
|
368 |
}
|
369 |
len = strlen(name);
|
370 |
for (hPtr = Tcl_FirstHashEntry(&textPtr->imageTable, &search);
|
371 |
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
|
372 |
char *haveName = Tcl_GetHashKey(&textPtr->imageTable, hPtr);
|
373 |
if (strncmp(name, haveName, len) == 0) {
|
374 |
new = 0;
|
375 |
sscanf(haveName+len,"#%d",&new);
|
376 |
if (new > count) {
|
377 |
count = new;
|
378 |
}
|
379 |
if (len == (int) strlen(haveName)) {
|
380 |
conflict = 1;
|
381 |
}
|
382 |
}
|
383 |
}
|
384 |
|
385 |
Tcl_DStringInit(&newName);
|
386 |
Tcl_DStringAppend(&newName,name, -1);
|
387 |
|
388 |
if (conflict) {
|
389 |
char buf[4 + TCL_INTEGER_SPACE];
|
390 |
sprintf(buf, "#%d",count+1);
|
391 |
Tcl_DStringAppend(&newName,buf, -1);
|
392 |
}
|
393 |
name = Tcl_DStringValue(&newName);
|
394 |
hPtr = Tcl_CreateHashEntry(&textPtr->imageTable, name, &new);
|
395 |
Tcl_SetHashValue(hPtr, eiPtr);
|
396 |
Tcl_AppendResult(textPtr->interp, name , (char *) NULL);
|
397 |
eiPtr->body.ei.name = ckalloc((unsigned) Tcl_DStringLength(&newName)+1);
|
398 |
strcpy(eiPtr->body.ei.name,name);
|
399 |
Tcl_DStringFree(&newName);
|
400 |
|
401 |
return TCL_OK;
|
402 |
}
|
403 |
|
404 |
/*
|
405 |
*--------------------------------------------------------------
|
406 |
*
|
407 |
* AlignParseProc --
|
408 |
*
|
409 |
* This procedure is invoked by Tk_ConfigureWidget during
|
410 |
* option processing to handle "-align" options for embedded
|
411 |
* images.
|
412 |
*
|
413 |
* Results:
|
414 |
* A standard Tcl return value.
|
415 |
*
|
416 |
* Side effects:
|
417 |
* The alignment for the embedded image may change.
|
418 |
*
|
419 |
*--------------------------------------------------------------
|
420 |
*/
|
421 |
|
422 |
/* ARGSUSED */
|
423 |
static int
|
424 |
AlignParseProc(clientData, interp, tkwin, value, widgRec, offset)
|
425 |
ClientData clientData; /* Not used.*/
|
426 |
Tcl_Interp *interp; /* Used for reporting errors. */
|
427 |
Tk_Window tkwin; /* Window for text widget. */
|
428 |
char *value; /* Value of option. */
|
429 |
char *widgRec; /* Pointer to TkTextEmbWindow
|
430 |
* structure. */
|
431 |
int offset; /* Offset into item (ignored). */
|
432 |
{
|
433 |
register TkTextEmbImage *embPtr = (TkTextEmbImage *) widgRec;
|
434 |
|
435 |
if (strcmp(value, "baseline") == 0) {
|
436 |
embPtr->align = ALIGN_BASELINE;
|
437 |
} else if (strcmp(value, "bottom") == 0) {
|
438 |
embPtr->align = ALIGN_BOTTOM;
|
439 |
} else if (strcmp(value, "center") == 0) {
|
440 |
embPtr->align = ALIGN_CENTER;
|
441 |
} else if (strcmp(value, "top") == 0) {
|
442 |
embPtr->align = ALIGN_TOP;
|
443 |
} else {
|
444 |
Tcl_AppendResult(interp, "bad alignment \"", value,
|
445 |
"\": must be baseline, bottom, center, or top",
|
446 |
(char *) NULL);
|
447 |
return TCL_ERROR;
|
448 |
}
|
449 |
return TCL_OK;
|
450 |
}
|
451 |
|
452 |
/*
|
453 |
*--------------------------------------------------------------
|
454 |
*
|
455 |
* AlignPrintProc --
|
456 |
*
|
457 |
* This procedure is invoked by the Tk configuration code
|
458 |
* to produce a printable string for the "-align" configuration
|
459 |
* option for embedded images.
|
460 |
*
|
461 |
* Results:
|
462 |
* The return value is a string describing the embedded
|
463 |
* images's current alignment.
|
464 |
*
|
465 |
* Side effects:
|
466 |
* None.
|
467 |
*
|
468 |
*--------------------------------------------------------------
|
469 |
*/
|
470 |
|
471 |
/* ARGSUSED */
|
472 |
static char *
|
473 |
AlignPrintProc(clientData, tkwin, widgRec, offset, freeProcPtr)
|
474 |
ClientData clientData; /* Ignored. */
|
475 |
Tk_Window tkwin; /* Window for text widget. */
|
476 |
char *widgRec; /* Pointer to TkTextEmbImage
|
477 |
* structure. */
|
478 |
int offset; /* Ignored. */
|
479 |
Tcl_FreeProc **freeProcPtr; /* Pointer to variable to fill in with
|
480 |
* information about how to reclaim
|
481 |
* storage for return string. */
|
482 |
{
|
483 |
switch (((TkTextEmbImage *) widgRec)->align) {
|
484 |
case ALIGN_BASELINE:
|
485 |
return "baseline";
|
486 |
case ALIGN_BOTTOM:
|
487 |
return "bottom";
|
488 |
case ALIGN_CENTER:
|
489 |
return "center";
|
490 |
case ALIGN_TOP:
|
491 |
return "top";
|
492 |
default:
|
493 |
return "??";
|
494 |
}
|
495 |
}
|
496 |
|
497 |
/*
|
498 |
*--------------------------------------------------------------
|
499 |
*
|
500 |
* EmbImageDeleteProc --
|
501 |
*
|
502 |
* This procedure is invoked by the text B-tree code whenever
|
503 |
* an embedded image lies in a range of characters being deleted.
|
504 |
*
|
505 |
* Results:
|
506 |
* Returns 0 to indicate that the deletion has been accepted.
|
507 |
*
|
508 |
* Side effects:
|
509 |
* The embedded image is deleted, if it exists, and any resources
|
510 |
* associated with it are released.
|
511 |
*
|
512 |
*--------------------------------------------------------------
|
513 |
*/
|
514 |
|
515 |
/* ARGSUSED */
|
516 |
static int
|
517 |
EmbImageDeleteProc(eiPtr, linePtr, treeGone)
|
518 |
TkTextSegment *eiPtr; /* Segment being deleted. */
|
519 |
TkTextLine *linePtr; /* Line containing segment. */
|
520 |
int treeGone; /* Non-zero means the entire tree is
|
521 |
* being deleted, so everything must
|
522 |
* get cleaned up. */
|
523 |
{
|
524 |
Tcl_HashEntry *hPtr;
|
525 |
|
526 |
if (eiPtr->body.ei.image != NULL) {
|
527 |
hPtr = Tcl_FindHashEntry(&eiPtr->body.ei.textPtr->imageTable,
|
528 |
eiPtr->body.ei.name);
|
529 |
if (hPtr != NULL) {
|
530 |
/*
|
531 |
* (It's possible for there to be no hash table entry for this
|
532 |
* image, if an error occurred while creating the image segment
|
533 |
* but before the image got added to the table)
|
534 |
*/
|
535 |
|
536 |
Tcl_DeleteHashEntry(hPtr);
|
537 |
}
|
538 |
Tk_FreeImage(eiPtr->body.ei.image);
|
539 |
}
|
540 |
Tk_FreeOptions(configSpecs, (char *) &eiPtr->body.ei,
|
541 |
eiPtr->body.ei.textPtr->display, 0);
|
542 |
if (eiPtr->body.ei.name != NULL) {
|
543 |
ckfree(eiPtr->body.ei.name);
|
544 |
}
|
545 |
ckfree((char *) eiPtr);
|
546 |
return 0;
|
547 |
}
|
548 |
|
549 |
/*
|
550 |
*--------------------------------------------------------------
|
551 |
*
|
552 |
* EmbImageCleanupProc --
|
553 |
*
|
554 |
* This procedure is invoked by the B-tree code whenever a
|
555 |
* segment containing an embedded image is moved from one
|
556 |
* line to another.
|
557 |
*
|
558 |
* Results:
|
559 |
* None.
|
560 |
*
|
561 |
* Side effects:
|
562 |
* The linePtr field of the segment gets updated.
|
563 |
*
|
564 |
*--------------------------------------------------------------
|
565 |
*/
|
566 |
|
567 |
static TkTextSegment *
|
568 |
EmbImageCleanupProc(eiPtr, linePtr)
|
569 |
TkTextSegment *eiPtr; /* Mark segment that's being moved. */
|
570 |
TkTextLine *linePtr; /* Line that now contains segment. */
|
571 |
{
|
572 |
eiPtr->body.ei.linePtr = linePtr;
|
573 |
return eiPtr;
|
574 |
}
|
575 |
|
576 |
/*
|
577 |
*--------------------------------------------------------------
|
578 |
*
|
579 |
* EmbImageLayoutProc --
|
580 |
*
|
581 |
* This procedure is the "layoutProc" for embedded image
|
582 |
* segments.
|
583 |
*
|
584 |
* Results:
|
585 |
* 1 is returned to indicate that the segment should be
|
586 |
* displayed. The chunkPtr structure is filled in.
|
587 |
*
|
588 |
* Side effects:
|
589 |
* None, except for filling in chunkPtr.
|
590 |
*
|
591 |
*--------------------------------------------------------------
|
592 |
*/
|
593 |
|
594 |
/*ARGSUSED*/
|
595 |
static int
|
596 |
EmbImageLayoutProc(textPtr, indexPtr, eiPtr, offset, maxX, maxChars,
|
597 |
noCharsYet, wrapMode, chunkPtr)
|
598 |
TkText *textPtr; /* Text widget being layed out. */
|
599 |
TkTextIndex *indexPtr; /* Identifies first character in chunk. */
|
600 |
TkTextSegment *eiPtr; /* Segment corresponding to indexPtr. */
|
601 |
int offset; /* Offset within segPtr corresponding to
|
602 |
* indexPtr (always 0). */
|
603 |
int maxX; /* Chunk must not occupy pixels at this
|
604 |
* position or higher. */
|
605 |
int maxChars; /* Chunk must not include more than this
|
606 |
* many characters. */
|
607 |
int noCharsYet; /* Non-zero means no characters have been
|
608 |
* assigned to this line yet. */
|
609 |
TkWrapMode wrapMode; /* Wrap mode to use for line: TEXT_WRAPMODE_CHAR,
|
610 |
* TEXT_WRAPMODE_NONE, or TEXT_WRAPMODE_WORD. */
|
611 |
register TkTextDispChunk *chunkPtr;
|
612 |
/* Structure to fill in with information
|
613 |
* about this chunk. The x field has already
|
614 |
* been set by the caller. */
|
615 |
{
|
616 |
int width, height;
|
617 |
|
618 |
if (offset != 0) {
|
619 |
panic("Non-zero offset in EmbImageLayoutProc");
|
620 |
}
|
621 |
|
622 |
/*
|
623 |
* See if there's room for this image on this line.
|
624 |
*/
|
625 |
|
626 |
if (eiPtr->body.ei.image == NULL) {
|
627 |
width = 0;
|
628 |
height = 0;
|
629 |
} else {
|
630 |
Tk_SizeOfImage(eiPtr->body.ei.image, &width, &height);
|
631 |
width += 2*eiPtr->body.ei.padX;
|
632 |
height += 2*eiPtr->body.ei.padY;
|
633 |
}
|
634 |
if ((width > (maxX - chunkPtr->x))
|
635 |
&& !noCharsYet && (textPtr->wrapMode != TEXT_WRAPMODE_NONE)) {
|
636 |
return 0;
|
637 |
}
|
638 |
|
639 |
/*
|
640 |
* Fill in the chunk structure.
|
641 |
*/
|
642 |
|
643 |
chunkPtr->displayProc = EmbImageDisplayProc;
|
644 |
chunkPtr->undisplayProc = (Tk_ChunkUndisplayProc *) NULL;
|
645 |
chunkPtr->measureProc = (Tk_ChunkMeasureProc *) NULL;
|
646 |
chunkPtr->bboxProc = EmbImageBboxProc;
|
647 |
chunkPtr->numBytes = 1;
|
648 |
if (eiPtr->body.ei.align == ALIGN_BASELINE) {
|
649 |
chunkPtr->minAscent = height - eiPtr->body.ei.padY;
|
650 |
chunkPtr->minDescent = eiPtr->body.ei.padY;
|
651 |
chunkPtr->minHeight = 0;
|
652 |
} else {
|
653 |
chunkPtr->minAscent = 0;
|
654 |
chunkPtr->minDescent = 0;
|
655 |
chunkPtr->minHeight = height;
|
656 |
}
|
657 |
chunkPtr->width = width;
|
658 |
chunkPtr->breakIndex = -1;
|
659 |
chunkPtr->breakIndex = 1;
|
660 |
chunkPtr->clientData = (ClientData) eiPtr;
|
661 |
eiPtr->body.ei.chunkCount += 1;
|
662 |
return 1;
|
663 |
}
|
664 |
|
665 |
/*
|
666 |
*--------------------------------------------------------------
|
667 |
*
|
668 |
* EmbImageCheckProc --
|
669 |
*
|
670 |
* This procedure is invoked by the B-tree code to perform
|
671 |
* consistency checks on embedded images.
|
672 |
*
|
673 |
* Results:
|
674 |
* None.
|
675 |
*
|
676 |
* Side effects:
|
677 |
* The procedure panics if it detects anything wrong with
|
678 |
* the embedded image.
|
679 |
*
|
680 |
*--------------------------------------------------------------
|
681 |
*/
|
682 |
|
683 |
static void
|
684 |
EmbImageCheckProc(eiPtr, linePtr)
|
685 |
TkTextSegment *eiPtr; /* Segment to check. */
|
686 |
TkTextLine *linePtr; /* Line containing segment. */
|
687 |
{
|
688 |
if (eiPtr->nextPtr == NULL) {
|
689 |
panic("EmbImageCheckProc: embedded image is last segment in line");
|
690 |
}
|
691 |
if (eiPtr->size != 1) {
|
692 |
panic("EmbImageCheckProc: embedded image has size %d", eiPtr->size);
|
693 |
}
|
694 |
}
|
695 |
|
696 |
/*
|
697 |
*--------------------------------------------------------------
|
698 |
*
|
699 |
* EmbImageDisplayProc --
|
700 |
*
|
701 |
* This procedure is invoked by the text displaying code
|
702 |
* when it is time to actually draw an embedded image
|
703 |
* chunk on the screen.
|
704 |
*
|
705 |
* Results:
|
706 |
* None.
|
707 |
*
|
708 |
* Side effects:
|
709 |
* The embedded image gets moved to the correct location
|
710 |
* and drawn onto the display.
|
711 |
*
|
712 |
*--------------------------------------------------------------
|
713 |
*/
|
714 |
|
715 |
static void
|
716 |
EmbImageDisplayProc(chunkPtr, x, y, lineHeight, baseline, display, dst, screenY)
|
717 |
TkTextDispChunk *chunkPtr; /* Chunk that is to be drawn. */
|
718 |
int x; /* X-position in dst at which to
|
719 |
* draw this chunk (differs from
|
720 |
* the x-position in the chunk because
|
721 |
* of scrolling). */
|
722 |
int y; /* Top of rectangular bounding box
|
723 |
* for line: tells where to draw this
|
724 |
* chunk in dst (x-position is in
|
725 |
* the chunk itself). */
|
726 |
int lineHeight; /* Total height of line. */
|
727 |
int baseline; /* Offset of baseline from y. */
|
728 |
Display *display; /* Display to use for drawing. */
|
729 |
Drawable dst; /* Pixmap or window in which to draw */
|
730 |
int screenY; /* Y-coordinate in text window that
|
731 |
* corresponds to y. */
|
732 |
{
|
733 |
TkTextSegment *eiPtr = (TkTextSegment *) chunkPtr->clientData;
|
734 |
int lineX, imageX, imageY, width, height;
|
735 |
Tk_Image image;
|
736 |
|
737 |
image = eiPtr->body.ei.image;
|
738 |
if (image == NULL) {
|
739 |
return;
|
740 |
}
|
741 |
if ((x + chunkPtr->width) <= 0) {
|
742 |
return;
|
743 |
}
|
744 |
|
745 |
/*
|
746 |
* Compute the image's location and size in the text widget, taking
|
747 |
* into account the align value for the image.
|
748 |
*/
|
749 |
|
750 |
EmbImageBboxProc(chunkPtr, 0, y, lineHeight, baseline, &lineX,
|
751 |
&imageY, &width, &height);
|
752 |
imageX = lineX - chunkPtr->x + x;
|
753 |
|
754 |
Tk_RedrawImage(image, 0, 0, width, height, dst,
|
755 |
imageX, imageY);
|
756 |
}
|
757 |
|
758 |
/*
|
759 |
*--------------------------------------------------------------
|
760 |
*
|
761 |
* EmbImageBboxProc --
|
762 |
*
|
763 |
* This procedure is called to compute the bounding box of
|
764 |
* the area occupied by an embedded image.
|
765 |
*
|
766 |
* Results:
|
767 |
* There is no return value. *xPtr and *yPtr are filled in
|
768 |
* with the coordinates of the upper left corner of the
|
769 |
* image, and *widthPtr and *heightPtr are filled in with
|
770 |
* the dimensions of the image in pixels. Note: not all
|
771 |
* of the returned bbox is necessarily visible on the screen
|
772 |
* (the rightmost part might be off-screen to the right,
|
773 |
* and the bottommost part might be off-screen to the bottom).
|
774 |
*
|
775 |
* Side effects:
|
776 |
* None.
|
777 |
*
|
778 |
*--------------------------------------------------------------
|
779 |
*/
|
780 |
|
781 |
static void
|
782 |
EmbImageBboxProc(chunkPtr, index, y, lineHeight, baseline, xPtr, yPtr,
|
783 |
widthPtr, heightPtr)
|
784 |
TkTextDispChunk *chunkPtr; /* Chunk containing desired char. */
|
785 |
int index; /* Index of desired character within
|
786 |
* the chunk. */
|
787 |
int y; /* Topmost pixel in area allocated
|
788 |
* for this line. */
|
789 |
int lineHeight; /* Total height of line. */
|
790 |
int baseline; /* Location of line's baseline, in
|
791 |
* pixels measured down from y. */
|
792 |
int *xPtr, *yPtr; /* Gets filled in with coords of
|
793 |
* character's upper-left pixel. */
|
794 |
int *widthPtr; /* Gets filled in with width of
|
795 |
* character, in pixels. */
|
796 |
int *heightPtr; /* Gets filled in with height of
|
797 |
* character, in pixels. */
|
798 |
{
|
799 |
TkTextSegment *eiPtr = (TkTextSegment *) chunkPtr->clientData;
|
800 |
Tk_Image image;
|
801 |
|
802 |
image = eiPtr->body.ei.image;
|
803 |
if (image != NULL) {
|
804 |
Tk_SizeOfImage(image, widthPtr, heightPtr);
|
805 |
} else {
|
806 |
*widthPtr = 0;
|
807 |
*heightPtr = 0;
|
808 |
}
|
809 |
*xPtr = chunkPtr->x + eiPtr->body.ei.padX;
|
810 |
switch (eiPtr->body.ei.align) {
|
811 |
case ALIGN_BOTTOM:
|
812 |
*yPtr = y + (lineHeight - *heightPtr - eiPtr->body.ei.padY);
|
813 |
break;
|
814 |
case ALIGN_CENTER:
|
815 |
*yPtr = y + (lineHeight - *heightPtr)/2;
|
816 |
break;
|
817 |
case ALIGN_TOP:
|
818 |
*yPtr = y + eiPtr->body.ei.padY;
|
819 |
break;
|
820 |
case ALIGN_BASELINE:
|
821 |
*yPtr = y + (baseline - *heightPtr);
|
822 |
break;
|
823 |
}
|
824 |
}
|
825 |
|
826 |
/*
|
827 |
*--------------------------------------------------------------
|
828 |
*
|
829 |
* TkTextImageIndex --
|
830 |
*
|
831 |
* Given the name of an embedded image within a text widget,
|
832 |
* returns an index corresponding to the image's position
|
833 |
* in the text.
|
834 |
*
|
835 |
* Results:
|
836 |
* The return value is 1 if there is an embedded image by
|
837 |
* the given name in the text widget, 0 otherwise. If the
|
838 |
* image exists, *indexPtr is filled in with its index.
|
839 |
*
|
840 |
* Side effects:
|
841 |
* None.
|
842 |
*
|
843 |
*--------------------------------------------------------------
|
844 |
*/
|
845 |
|
846 |
int
|
847 |
TkTextImageIndex(textPtr, name, indexPtr)
|
848 |
TkText *textPtr; /* Text widget containing image. */
|
849 |
char *name; /* Name of image. */
|
850 |
TkTextIndex *indexPtr; /* Index information gets stored here. */
|
851 |
{
|
852 |
Tcl_HashEntry *hPtr;
|
853 |
TkTextSegment *eiPtr;
|
854 |
|
855 |
hPtr = Tcl_FindHashEntry(&textPtr->imageTable, name);
|
856 |
if (hPtr == NULL) {
|
857 |
return 0;
|
858 |
}
|
859 |
eiPtr = (TkTextSegment *) Tcl_GetHashValue(hPtr);
|
860 |
indexPtr->tree = textPtr->tree;
|
861 |
indexPtr->linePtr = eiPtr->body.ei.linePtr;
|
862 |
indexPtr->byteIndex = TkTextSegToOffset(eiPtr, indexPtr->linePtr);
|
863 |
return 1;
|
864 |
}
|
865 |
|
866 |
/*
|
867 |
*--------------------------------------------------------------
|
868 |
*
|
869 |
* EmbImageProc --
|
870 |
*
|
871 |
* This procedure is called by the image code whenever an
|
872 |
* image or its contents changes.
|
873 |
*
|
874 |
* Results:
|
875 |
* None.
|
876 |
*
|
877 |
* Side effects:
|
878 |
* The image will be redisplayed.
|
879 |
*
|
880 |
*--------------------------------------------------------------
|
881 |
*/
|
882 |
|
883 |
static void
|
884 |
EmbImageProc(clientData, x, y, width, height, imgWidth, imgHeight)
|
885 |
ClientData clientData; /* Pointer to widget record. */
|
886 |
int x, y; /* Upper left pixel (within image)
|
887 |
* that must be redisplayed. */
|
888 |
int width, height; /* Dimensions of area to redisplay
|
889 |
* (may be <= 0). */
|
890 |
int imgWidth, imgHeight; /* New dimensions of image. */
|
891 |
|
892 |
{
|
893 |
TkTextSegment *eiPtr = (TkTextSegment *) clientData;
|
894 |
TkTextIndex index;
|
895 |
|
896 |
index.tree = eiPtr->body.ei.textPtr->tree;
|
897 |
index.linePtr = eiPtr->body.ei.linePtr;
|
898 |
index.byteIndex = TkTextSegToOffset(eiPtr, eiPtr->body.ei.linePtr);
|
899 |
TkTextChanged(eiPtr->body.ei.textPtr, &index, &index);
|
900 |
}
|
901 |
|
902 |
|
903 |
/* $History: tkTextImage.c $
|
904 |
*
|
905 |
* ***************** Version 1 *****************
|
906 |
* User: Dtashley Date: 1/02/01 Time: 3:07a
|
907 |
* Created in $/IjuScripter, IjuConsole/Source/Tk Base
|
908 |
* Initial check-in.
|
909 |
*/
|
910 |
|
911 |
/* End of TKTEXTIMAGE.C */ |