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archie/tk3.6/tkCanvText.c

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Intial commit
2024-05-27 16:13:40 +02:00
/*
* tkCanvText.c --
*
* This file implements text items for canvas widgets.
*
* Copyright (c) 1991-1993 The Regents of the University of California.
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
* CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*/
#ifndef lint
static char rcsid[] = "$Header: /user6/ouster/wish/RCS/tkCanvText.c,v 1.28 93/08/18 16:25:27 ouster Exp $ SPRITE (Berkeley)";
#endif
#include <stdio.h>
#include "tkInt.h"
#include "tkCanvas.h"
#include "tkConfig.h"
/*
* One of the following structures is kept for each line of text
* in a text item. It contains geometry and display information
* for that line.
*/
typedef struct TextLine {
char *firstChar; /* Pointer to the first character in this
* line (in the "text" field of enclosing
* text item). */
int numChars; /* Number of characters displayed in this
* line. */
int totalChars; /* Total number of characters included as
* part of this line (may include an extra
* space character at the end that isn't
* displayed). */
int x, y; /* Origin at which to draw line on screen
* (in integer pixel units, but in canvas
* coordinates, not screen coordinates). */
int x1, y1; /* Upper-left pixel that is part of text
* line on screen (again, in integer canvas
* pixel units). */
int x2, y2; /* Lower-left pixel that is part of text
* line on screen (again, in integer canvas
* pixel units). */
} TextLine;
/*
* The structure below defines the record for each text item.
*/
typedef struct TextItem {
Tk_Item header; /* Generic stuff that's the same for all
* types. MUST BE FIRST IN STRUCTURE. */
char *text; /* Text for item (malloc-ed). */
int numChars; /* Number of non-NULL characters in text. */
double x, y; /* Positioning point for text. */
Tk_Anchor anchor; /* Where to anchor text relative to (x,y). */
int width; /* Width of lines for word-wrap, pixels.
* Zero means no word-wrap. */
Tk_Justify justify; /* Justification mode for text. */
int rightEdge; /* Pixel just to right of right edge of
* area of text item. Used for selecting
* up to end of line. */
XFontStruct *fontPtr; /* Font for drawing text. */
XColor *color; /* Color for text. */
Pixmap stipple; /* Stipple bitmap for text, or None. */
GC gc; /* Graphics context for drawing text. */
TextLine *linePtr; /* Pointer to array of structures describing
* individual lines of text item (malloc-ed). */
int numLines; /* Number of structs at *linePtr. */
int insertPos; /* Insertion cursor is displayed just to left
* of character with this index. */
GC selTextGC; /* Graphics context for selected text. */
} TextItem;
/*
* Information used for parsing configuration specs:
*/
static Tk_ConfigSpec configSpecs[] = {
{TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL,
"center", Tk_Offset(TextItem, anchor),
TK_CONFIG_DONT_SET_DEFAULT},
{TK_CONFIG_COLOR, "-fill", (char *) NULL, (char *) NULL,
"black", Tk_Offset(TextItem, color), 0},
{TK_CONFIG_FONT, "-font", (char *) NULL, (char *) NULL,
"-Adobe-Helvetica-Bold-R-Normal--*-120-*",
Tk_Offset(TextItem, fontPtr), 0},
{TK_CONFIG_JUSTIFY, "-justify", (char *) NULL, (char *) NULL,
"left", Tk_Offset(TextItem, justify),
TK_CONFIG_DONT_SET_DEFAULT},
{TK_CONFIG_BITMAP, "-stipple", (char *) NULL, (char *) NULL,
(char *) NULL, Tk_Offset(TextItem, stipple), TK_CONFIG_NULL_OK},
{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL,
(char *) NULL, 0, TK_CONFIG_NULL_OK, &tkCanvasTagsOption},
{TK_CONFIG_STRING, "-text", (char *) NULL, (char *) NULL,
"", Tk_Offset(TextItem, text), 0},
{TK_CONFIG_PIXELS, "-width", (char *) NULL, (char *) NULL,
"0", Tk_Offset(TextItem, width), TK_CONFIG_DONT_SET_DEFAULT},
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
(char *) NULL, 0, 0}
};
/*
* Prototypes for procedures defined in this file:
*/
static void ComputeTextBbox _ANSI_ARGS_((Tk_Canvas *canvasPtr,
TextItem *textPtr));
static int ConfigureText _ANSI_ARGS_((
Tk_Canvas *canvasPtr, Tk_Item *itemPtr, int argc,
char **argv, int flags));
static int CreateText _ANSI_ARGS_((Tk_Canvas *canvasPtr,
struct Tk_Item *itemPtr, int argc, char **argv));
static void DeleteText _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr));
static void DisplayText _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, Drawable dst));
static int GetSelText _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, int offset, char *buffer,
int maxBytes));
static int GetTextIndex _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, char *indexString,
int *indexPtr));
static void LineToPostscript _ANSI_ARGS_((Tcl_Interp *interp,
char *string, int numChars));
static void ScaleText _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, double originX, double originY,
double scaleX, double scaleY));
static void SetTextCursor _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, int index));
static int TextCoords _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, int argc, char **argv));
static int TextDeleteChars _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, int first, int last));
static int TextInsert _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, int beforeThis, char *string));
static int TextToArea _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, double *rectPtr));
static double TextToPoint _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, double *pointPtr));
static int TextToPostscript _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, Tk_PostscriptInfo *psInfoPtr));
static void TranslateText _ANSI_ARGS_((Tk_Canvas *canvasPtr,
Tk_Item *itemPtr, double deltaX, double deltaY));
/*
* The structures below defines the rectangle and oval item types
* by means of procedures that can be invoked by generic item code.
*/
Tk_ItemType TkTextType = {
"text", /* name */
sizeof(TextItem), /* itemSize */
CreateText, /* createProc */
configSpecs, /* configSpecs */
ConfigureText, /* configureProc */
TextCoords, /* coordProc */
DeleteText, /* deleteProc */
DisplayText, /* displayProc */
0, /* alwaysRedraw */
TextToPoint, /* pointProc */
TextToArea, /* areaProc */
TextToPostscript, /* postscriptProc */
ScaleText, /* scaleProc */
TranslateText, /* translateProc */
GetTextIndex, /* indexProc */
SetTextCursor, /* icursorProc */
GetSelText, /* selectionProc */
TextInsert, /* insertProc */
TextDeleteChars, /* dTextProc */
(Tk_ItemType *) NULL /* nextPtr */
};
/*
*--------------------------------------------------------------
*
* CreateText --
*
* This procedure is invoked to create a new text item
* in a canvas.
*
* Results:
* A standard Tcl return value. If an error occurred in
* creating the item then an error message is left in
* canvasPtr->interp->result; in this case itemPtr is
* left uninitialized so it can be safely freed by the
* caller.
*
* Side effects:
* A new text item is created.
*
*--------------------------------------------------------------
*/
static int
CreateText(canvasPtr, itemPtr, argc, argv)
register Tk_Canvas *canvasPtr; /* Canvas to hold new item. */
Tk_Item *itemPtr; /* Record to hold new item; header
* has been initialized by caller. */
int argc; /* Number of arguments in argv. */
char **argv; /* Arguments describing rectangle. */
{
register TextItem *textPtr = (TextItem *) itemPtr;
if (argc < 2) {
Tcl_AppendResult(canvasPtr->interp, "wrong # args: should be \"",
Tk_PathName(canvasPtr->tkwin), "\" create ",
itemPtr->typePtr->name, " x y [options]", (char *) NULL);
return TCL_ERROR;
}
/*
* Carry out initialization that is needed in order to clean
* up after errors during the the remainder of this procedure.
*/
textPtr->text = NULL;
textPtr->numChars = 0;
textPtr->anchor = TK_ANCHOR_CENTER;
textPtr->width = 0;
textPtr->justify = TK_JUSTIFY_LEFT;
textPtr->rightEdge = 0;
textPtr->fontPtr = NULL;
textPtr->color = NULL;
textPtr->stipple = None;
textPtr->gc = None;
textPtr->linePtr = NULL;
textPtr->numLines = 0;
textPtr->insertPos = 0;
textPtr->selTextGC = None;
/*
* Process the arguments to fill in the item record.
*/
if ((TkGetCanvasCoord(canvasPtr, argv[0], &textPtr->x) != TCL_OK)
|| (TkGetCanvasCoord(canvasPtr, argv[1], &textPtr->y) != TCL_OK)) {
return TCL_ERROR;
}
if (ConfigureText(canvasPtr, itemPtr, argc-2, argv+2, 0) != TCL_OK) {
DeleteText(canvasPtr, itemPtr);
return TCL_ERROR;
}
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* TextCoords --
*
* This procedure is invoked to process the "coords" widget
* command on text items. See the user documentation for
* details on what it does.
*
* Results:
* Returns TCL_OK or TCL_ERROR, and sets canvasPtr->interp->result.
*
* Side effects:
* The coordinates for the given item may be changed.
*
*--------------------------------------------------------------
*/
static int
TextCoords(canvasPtr, itemPtr, argc, argv)
register Tk_Canvas *canvasPtr; /* Canvas containing item. */
Tk_Item *itemPtr; /* Item whose coordinates are to be
* read or modified. */
int argc; /* Number of coordinates supplied in
* argv. */
char **argv; /* Array of coordinates: x1, y1,
* x2, y2, ... */
{
register TextItem *textPtr = (TextItem *) itemPtr;
char x[TCL_DOUBLE_SPACE], y[TCL_DOUBLE_SPACE];
if (argc == 0) {
Tcl_PrintDouble(canvasPtr->interp, textPtr->x, x);
Tcl_PrintDouble(canvasPtr->interp, textPtr->y, y);
Tcl_AppendResult(canvasPtr->interp, x, " ", y, (char *) NULL);
} else if (argc == 2) {
if ((TkGetCanvasCoord(canvasPtr, argv[0], &textPtr->x) != TCL_OK)
|| (TkGetCanvasCoord(canvasPtr, argv[1],
&textPtr->y) != TCL_OK)) {
return TCL_ERROR;
}
ComputeTextBbox(canvasPtr, textPtr);
} else {
sprintf(canvasPtr->interp->result,
"wrong # coordinates: expected 0 or 2, got %d",
argc);
return TCL_ERROR;
}
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* ConfigureText --
*
* This procedure is invoked to configure various aspects
* of a text item, such as its border and background colors.
*
* Results:
* A standard Tcl result code. If an error occurs, then
* an error message is left in canvasPtr->interp->result.
*
* Side effects:
* Configuration information, such as colors and stipple
* patterns, may be set for itemPtr.
*
*--------------------------------------------------------------
*/
static int
ConfigureText(canvasPtr, itemPtr, argc, argv, flags)
Tk_Canvas *canvasPtr; /* Canvas containing itemPtr. */
Tk_Item *itemPtr; /* Rectangle item to reconfigure. */
int argc; /* Number of elements in argv. */
char **argv; /* Arguments describing things to configure. */
int flags; /* Flags to pass to Tk_ConfigureWidget. */
{
register TextItem *textPtr = (TextItem *) itemPtr;
XGCValues gcValues;
GC newGC, newSelGC;
unsigned long mask;
if (Tk_ConfigureWidget(canvasPtr->interp, canvasPtr->tkwin,
configSpecs, argc, argv, (char *) textPtr, flags) != TCL_OK) {
return TCL_ERROR;
}
/*
* A few of the options require additional processing, such as
* graphics contexts.
*/
textPtr->numChars = strlen(textPtr->text);
newGC = newSelGC = None;
if ((textPtr->color != NULL) && (textPtr->fontPtr != NULL)) {
gcValues.foreground = textPtr->color->pixel;
gcValues.font = textPtr->fontPtr->fid;
mask = GCForeground|GCFont;
if (textPtr->stipple != None) {
gcValues.stipple = textPtr->stipple;
gcValues.fill_style = FillStippled;
mask |= GCForeground|GCStipple|GCFillStyle;
}
newGC = Tk_GetGC(canvasPtr->tkwin, mask, &gcValues);
gcValues.foreground = canvasPtr->selFgColorPtr->pixel;
newSelGC = Tk_GetGC(canvasPtr->tkwin, mask, &gcValues);
}
if (textPtr->gc != None) {
Tk_FreeGC(canvasPtr->display, textPtr->gc);
}
textPtr->gc = newGC;
if (textPtr->selTextGC != None) {
Tk_FreeGC(canvasPtr->display, textPtr->selTextGC);
}
textPtr->selTextGC = newSelGC;
/*
* If the text was changed, move the selection and insertion indices
* to keep them inside the item.
*/
if (canvasPtr->selItemPtr == itemPtr) {
if (canvasPtr->selectFirst >= textPtr->numChars) {
canvasPtr->selItemPtr = NULL;
} else {
if (canvasPtr->selectLast >= textPtr->numChars) {
canvasPtr->selectLast = textPtr->numChars-1;
}
if ((canvasPtr->anchorItemPtr == itemPtr)
&& (canvasPtr->selectAnchor >= textPtr->numChars)) {
canvasPtr->selectAnchor = textPtr->numChars-1;
}
}
}
if (textPtr->insertPos >= textPtr->numChars) {
textPtr->insertPos = textPtr->numChars;
}
ComputeTextBbox(canvasPtr, textPtr);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* DeleteText --
*
* This procedure is called to clean up the data structure
* associated with a text item.
*
* Results:
* None.
*
* Side effects:
* Resources associated with itemPtr are released.
*
*--------------------------------------------------------------
*/
static void
DeleteText(canvasPtr, itemPtr)
Tk_Canvas *canvasPtr; /* Info about overall canvas widget. */
Tk_Item *itemPtr; /* Item that is being deleted. */
{
register TextItem *textPtr = (TextItem *) itemPtr;
if (textPtr->text != NULL) {
ckfree(textPtr->text);
}
if (textPtr->fontPtr != NULL) {
Tk_FreeFontStruct(textPtr->fontPtr);
}
if (textPtr->color != NULL) {
Tk_FreeColor(textPtr->color);
}
if (textPtr->stipple != None) {
Tk_FreeBitmap(canvasPtr->display, textPtr->stipple);
}
if (textPtr->gc != None) {
Tk_FreeGC(canvasPtr->display, textPtr->gc);
}
if (textPtr->linePtr != NULL) {
ckfree((char *) textPtr->linePtr);
}
if (textPtr->selTextGC != None) {
Tk_FreeGC(canvasPtr->display, textPtr->selTextGC);
}
}
/*
*--------------------------------------------------------------
*
* ComputeTextBbox --
*
* This procedure is invoked to compute the bounding box of
* all the pixels that may be drawn as part of a text item.
* In addition, it recomputes all of the geometry information
* used to display a text item or check for mouse hits.
*
* Results:
* None.
*
* Side effects:
* The fields x1, y1, x2, and y2 are updated in the header
* for itemPtr, and the linePtr structure is regenerated
* for itemPtr.
*
*--------------------------------------------------------------
*/
static void
ComputeTextBbox(canvasPtr, textPtr)
register Tk_Canvas *canvasPtr; /* Canvas that contains item. */
register TextItem *textPtr; /* Item whose bbos is to be
* recomputed. */
{
register TextLine *linePtr;
#define MAX_LINES 100
char *lineStart[MAX_LINES];
int lineChars[MAX_LINES];
int linePixels[MAX_LINES];
int numLines, wrapPixels, maxLinePixels, leftX, topY, y;
int lineHeight, i, fudge;
char *p;
XCharStruct *maxBoundsPtr = &textPtr->fontPtr->max_bounds;
if (textPtr->linePtr != NULL) {
ckfree((char *) textPtr->linePtr);
textPtr->linePtr = NULL;
}
/*
* Work through the text computing the starting point, number of
* characters, and number of pixels in each line.
*/
p = textPtr->text;
if (textPtr->width > 0) {
wrapPixels = maxLinePixels = textPtr->width;
} else {
wrapPixels = 10000000;
maxLinePixels = 0;
}
for (numLines = 0; (numLines < MAX_LINES); numLines++) {
int numChars, numPixels;
numChars = TkMeasureChars(textPtr->fontPtr, p,
(textPtr->text + textPtr->numChars) - p, 0,
wrapPixels, TK_WHOLE_WORDS|TK_AT_LEAST_ONE, &numPixels);
if (numPixels > maxLinePixels) {
maxLinePixels = numPixels;
}
lineStart[numLines] = p;
lineChars[numLines] = numChars;
linePixels[numLines] = numPixels;
p += numChars;
/*
* Skip space character that terminates a line, if there is one.
* In the case of multiple spaces, all but one will be displayed.
* This is important to make sure the insertion cursor gets
* displayed when it is in the middle of a multi-space.
*/
if (isspace(UCHAR(*p))) {
p++;
} else if (*p == 0) {
/*
* The code below is tricky. Putting the loop termination
* here guarantees that there's a TextLine for the last
* line of text, even if the line is empty (this can
* also happen if the entire text item is empty). This is
* needed so that we can display the insertion cursor on a
* line even when it is empty.
*/
numLines++;
break;
}
}
/*
* Use overall geometry information to compute the top-left corner
* of the bounding box for the text item.
*/
leftX = textPtr->x + 0.5;
topY = textPtr->y + 0.5;
lineHeight = textPtr->fontPtr->ascent + textPtr->fontPtr->descent;
switch (textPtr->anchor) {
case TK_ANCHOR_NW:
case TK_ANCHOR_N:
case TK_ANCHOR_NE:
break;
case TK_ANCHOR_W:
case TK_ANCHOR_CENTER:
case TK_ANCHOR_E:
topY -= (lineHeight * numLines)/2;
break;
case TK_ANCHOR_SW:
case TK_ANCHOR_S:
case TK_ANCHOR_SE:
topY -= lineHeight * numLines;
break;
}
switch (textPtr->anchor) {
case TK_ANCHOR_NW:
case TK_ANCHOR_W:
case TK_ANCHOR_SW:
break;
case TK_ANCHOR_N:
case TK_ANCHOR_CENTER:
case TK_ANCHOR_S:
leftX -= maxLinePixels/2;
break;
case TK_ANCHOR_NE:
case TK_ANCHOR_E:
case TK_ANCHOR_SE:
leftX -= maxLinePixels;
break;
}
textPtr->rightEdge = leftX + maxLinePixels;
/*
* Create the new TextLine array and fill it in using the geometry
* information gathered already.
*/
if (numLines > 0) {
textPtr->linePtr = (TextLine *) ckalloc((unsigned)
(numLines * sizeof(TextLine)));
} else {
textPtr->linePtr = NULL;
}
textPtr->numLines = numLines;
for (i = 0, linePtr = textPtr->linePtr, y = topY;
i < numLines; i++, linePtr++, y += lineHeight) {
linePtr->firstChar = lineStart[i];
linePtr->numChars = lineChars[i];
if (i == (numLines-1)) {
linePtr->totalChars = linePtr->numChars;
} else {
linePtr->totalChars = lineStart[i+1] - lineStart[i];
}
switch (textPtr->justify) {
case TK_JUSTIFY_LEFT:
case TK_JUSTIFY_FILL:
linePtr->x = leftX;
break;
case TK_JUSTIFY_CENTER:
linePtr->x = leftX + maxLinePixels/2 - linePixels[i]/2;
break;
case TK_JUSTIFY_RIGHT:
linePtr->x = leftX + maxLinePixels - linePixels[i];
break;
}
linePtr->y = y + textPtr->fontPtr->ascent;
linePtr->x1 = linePtr->x + maxBoundsPtr->lbearing;
linePtr->y1 = y;
linePtr->x2 = linePtr->x + linePixels[i];
linePtr->y2 = linePtr->y + textPtr->fontPtr->descent - 1;
}
/*
* Last of all, update the bounding box for the item. The item's
* bounding box includes the bounding box of all its lines, plus
* an extra fudge factor for the cursor border (which could
* potentially be quite large).
*/
linePtr = textPtr->linePtr;
textPtr->header.x1 = textPtr->header.x2 = leftX;
textPtr->header.y1 = topY;
textPtr->header.y2 = topY + numLines*lineHeight;
for (linePtr = textPtr->linePtr, i = textPtr->numLines; i > 0;
i--, linePtr++) {
if (linePtr->x1 < textPtr->header.x1) {
textPtr->header.x1 = linePtr->x1;
}
if (linePtr->x2 >= textPtr->header.x2) {
textPtr->header.x2 = linePtr->x2 + 1;
}
}
fudge = (canvasPtr->insertWidth+1)/2;
if (canvasPtr->selBorderWidth > fudge) {
fudge = canvasPtr->selBorderWidth;
}
textPtr->header.x1 -= fudge;
textPtr->header.x2 += fudge;
}
/*
*--------------------------------------------------------------
*
* DisplayText --
*
* This procedure is invoked to draw a text item in a given
* drawable.
*
* Results:
* None.
*
* Side effects:
* ItemPtr is drawn in drawable using the transformation
* information in canvasPtr.
*
*--------------------------------------------------------------
*/
static void
DisplayText(canvasPtr, itemPtr, drawable)
register Tk_Canvas *canvasPtr; /* Canvas that contains item. */
Tk_Item *itemPtr; /* Item to be displayed. */
Drawable drawable; /* Pixmap or window in which to draw
* item. */
{
register TextItem *textPtr = (TextItem *) itemPtr;
Display *display = Tk_Display(canvasPtr->tkwin);
register TextLine *linePtr;
int i, focusHere, insertX, insertIndex, lineIndex;
int beforeSelect, inSelect, afterSelect, selStartX, selEndX;
if (textPtr->gc == None) {
return;
}
/*
* If we're stippling, then modify the stipple offset in the GC. Be
* sure to reset the offset when done, since the GC is supposed to be
* read-only.
*/
if (textPtr->stipple != None) {
XSetTSOrigin(display, textPtr->gc,
-canvasPtr->drawableXOrigin, -canvasPtr->drawableYOrigin);
}
focusHere = (canvasPtr->focusItemPtr == itemPtr) &&
(canvasPtr->flags & GOT_FOCUS);
for (linePtr = textPtr->linePtr, i = textPtr->numLines;
i > 0; linePtr++, i--) {
/*
* If part or all of this line is selected, then draw a special
* background under the selected part of the line.
*/
lineIndex = linePtr->firstChar - textPtr->text;
if ((canvasPtr->selItemPtr != itemPtr)
|| (canvasPtr->selectLast < lineIndex)
|| (canvasPtr->selectFirst >= (lineIndex
+ linePtr->totalChars))) {
beforeSelect = linePtr->numChars;
inSelect = 0;
} else {
beforeSelect = canvasPtr->selectFirst - lineIndex;
if (beforeSelect <= 0) {
beforeSelect = 0;
selStartX = linePtr->x;
} else {
(void) TkMeasureChars(textPtr->fontPtr,
linePtr->firstChar, beforeSelect, 0,
(int) 1000000, TK_PARTIAL_OK, &selStartX);
selStartX += linePtr->x;
}
inSelect = canvasPtr->selectLast + 1 - (lineIndex + beforeSelect);
/*
* If the selection spans the end of this line, then display
* selection background all the way to the end of the line.
* However, for the last line we only want to display up to
* the last character, not the end of the line, hence the
* "i != 1" check.
*/
if (inSelect >= (linePtr->totalChars - beforeSelect)) {
inSelect = linePtr->numChars - beforeSelect;
if (i != 1) {
selEndX = textPtr->rightEdge;
goto fillSelectBackground;
}
}
(void) TkMeasureChars(textPtr->fontPtr,
linePtr->firstChar + beforeSelect, inSelect,
selStartX-linePtr->x, (int) 1000000, TK_PARTIAL_OK,
&selEndX);
selEndX += linePtr->x;
fillSelectBackground:
Tk_Fill3DRectangle(display, drawable, canvasPtr->selBorder,
selStartX - canvasPtr->drawableXOrigin
- canvasPtr->selBorderWidth,
linePtr->y - canvasPtr->drawableYOrigin
- textPtr->fontPtr->ascent,
selEndX - selStartX + 2*canvasPtr->selBorderWidth,
textPtr->fontPtr->ascent + textPtr->fontPtr->descent,
canvasPtr->selBorderWidth, TK_RELIEF_RAISED);
}
/*
* If the insertion cursor is in this line, then draw a special
* background for the cursor before drawing the text. Note:
* if we're the cursor item but the cursor is turned off, then
* redraw background over the area of the cursor. This guarantees
* that the selection won't make the cursor invisible on mono
* displays, where both are drawn in the same color.
*/
if (focusHere) {
insertIndex = textPtr->insertPos
- (linePtr->firstChar - textPtr->text);
if ((insertIndex >= 0) && (insertIndex <= linePtr->numChars)) {
(void) TkMeasureChars(textPtr->fontPtr, linePtr->firstChar,
insertIndex, 0, (int) 1000000, TK_PARTIAL_OK, &insertX);
if (canvasPtr->flags & CURSOR_ON) {
Tk_Fill3DRectangle(display, drawable,
canvasPtr->insertBorder,
linePtr->x - canvasPtr->drawableXOrigin
+ insertX - (canvasPtr->insertWidth)/2,
linePtr->y - canvasPtr->drawableYOrigin
- textPtr->fontPtr->ascent,
canvasPtr->insertWidth,
textPtr->fontPtr->ascent
+ textPtr->fontPtr->descent,
canvasPtr->insertBorderWidth, TK_RELIEF_RAISED);
} else if (Tk_GetColorModel(canvasPtr->tkwin) != TK_COLOR){
Tk_Fill3DRectangle(display, drawable,
canvasPtr->bgBorder,
linePtr->x - canvasPtr->drawableXOrigin
+ insertX - (canvasPtr->insertWidth)/2,
linePtr->y - canvasPtr->drawableYOrigin
- textPtr->fontPtr->ascent,
canvasPtr->insertWidth,
textPtr->fontPtr->ascent
+ textPtr->fontPtr->descent,
0, TK_RELIEF_FLAT);
}
}
}
/*
* Display the text in three pieces: the part before the
* selection, the selected part (which needs a different graphics
* context), and the part after the selection.
*/
if (beforeSelect != 0) {
TkDisplayChars(display, drawable, textPtr->gc, textPtr->fontPtr,
linePtr->firstChar, beforeSelect,
linePtr->x - canvasPtr->drawableXOrigin,
linePtr->y - canvasPtr->drawableYOrigin, 0);
}
if (inSelect != 0) {
TkDisplayChars(display, drawable, textPtr->selTextGC,
textPtr->fontPtr, linePtr->firstChar + beforeSelect,
inSelect, selStartX - canvasPtr->drawableXOrigin,
linePtr->y - canvasPtr->drawableYOrigin, 0);
}
afterSelect = linePtr->numChars - beforeSelect - inSelect;
if (afterSelect > 0) {
TkDisplayChars(display, drawable, textPtr->gc, textPtr->fontPtr,
linePtr->firstChar + beforeSelect + inSelect,
afterSelect, selEndX - canvasPtr->drawableXOrigin,
linePtr->y - canvasPtr->drawableYOrigin, 0);
}
}
if (textPtr->stipple != None) {
XSetTSOrigin(display, textPtr->gc, 0, 0);
}
}
/*
*--------------------------------------------------------------
*
* TextInsert --
*
* Insert characters into a text item at a given position.
*
* Results:
* Always returns TCL_OK.
*
* Side effects:
* The text in the given item is modified. The cursor and
* selection positions are also modified to reflect the
* insertion.
*
*--------------------------------------------------------------
*/
static int
TextInsert(canvasPtr, itemPtr, beforeThis, string)
Tk_Canvas *canvasPtr; /* Canvas containing text item. */
Tk_Item *itemPtr; /* Text item to be modified. */
int beforeThis; /* Index of character before which text is
* to be inserted. */
char *string; /* New characters to be inserted. */
{
register TextItem *textPtr = (TextItem *) itemPtr;
int length;
char *new;
length = strlen(string);
if (length == 0) {
return TCL_OK;
}
if (beforeThis < 0) {
beforeThis = 0;
}
if (beforeThis > textPtr->numChars) {
beforeThis = textPtr->numChars;
}
new = (char *) ckalloc((unsigned) (textPtr->numChars + length + 1));
strncpy(new, textPtr->text, beforeThis);
strcpy(new+beforeThis, string);
strcpy(new+beforeThis+length, textPtr->text+beforeThis);
ckfree(textPtr->text);
textPtr->text = new;
textPtr->numChars += length;
/*
* Inserting characters invalidates indices such as those for the
* selection and cursor. Update the indices appropriately.
*/
if (canvasPtr->selItemPtr == itemPtr) {
if (canvasPtr->selectFirst >= beforeThis) {
canvasPtr->selectFirst += length;
}
if (canvasPtr->selectLast >= beforeThis) {
canvasPtr->selectLast += length;
}
if ((canvasPtr->anchorItemPtr == itemPtr)
&& (canvasPtr->selectAnchor >= beforeThis)) {
canvasPtr->selectAnchor += length;
}
}
if (textPtr->insertPos >= beforeThis) {
textPtr->insertPos += length;
}
ComputeTextBbox(canvasPtr, textPtr);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* TextDeleteChars --
*
* Delete one or more characters from a text item.
*
* Results:
* Always returns TCL_OK.
*
* Side effects:
* Characters between "first" and "last", inclusive, get
* deleted from itemPtr, and things like the selection
* position get updated.
*
*--------------------------------------------------------------
*/
static int
TextDeleteChars(canvasPtr, itemPtr, first, last)
Tk_Canvas *canvasPtr; /* Canvas containing itemPtr. */
Tk_Item *itemPtr; /* Item in which to delete characters. */
int first; /* Index of first character to delete. */
int last; /* Index of last character to delete. */
{
register TextItem *textPtr = (TextItem *) itemPtr;
int count;
char *new;
if (first < 0) {
first = 0;
}
if (last >= textPtr->numChars) {
last = textPtr->numChars-1;
}
if (first > last) {
return TCL_OK;
}
count = last + 1 - first;
new = ckalloc((unsigned) (textPtr->numChars + 1 - count));
strncpy(new, textPtr->text, first);
strcpy(new+first, textPtr->text+last+1);
ckfree(textPtr->text);
textPtr->text = new;
textPtr->numChars -= count;
/*
* Update indexes for the selection and cursor to reflect the
* renumbering of the remaining characters.
*/
if (canvasPtr->selItemPtr == itemPtr) {
if (canvasPtr->selectFirst > first) {
canvasPtr->selectFirst -= count;
if (canvasPtr->selectFirst < first) {
canvasPtr->selectFirst = first;
}
}
if (canvasPtr->selectLast >= first) {
canvasPtr->selectLast -= count;
if (canvasPtr->selectLast < (first-1)) {
canvasPtr->selectLast = (first-1);
}
}
if (canvasPtr->selectFirst > canvasPtr->selectLast) {
canvasPtr->selItemPtr = NULL;
}
if ((canvasPtr->anchorItemPtr == itemPtr)
&& (canvasPtr->selectAnchor > first)) {
canvasPtr->selectAnchor -= count;
if (canvasPtr->selectAnchor < first) {
canvasPtr->selectAnchor = first;
}
}
}
if (textPtr->insertPos > first) {
textPtr->insertPos -= count;
if (textPtr->insertPos < first) {
textPtr->insertPos = first;
}
}
ComputeTextBbox(canvasPtr, textPtr);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* TextToPoint --
*
* Computes the distance from a given point to a given
* text item, in canvas units.
*
* Results:
* The return value is 0 if the point whose x and y coordinates
* are pointPtr[0] and pointPtr[1] is inside the arc. If the
* point isn't inside the arc then the return value is the
* distance from the point to the arc.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
/* ARGSUSED */
static double
TextToPoint(canvasPtr, itemPtr, pointPtr)
Tk_Canvas *canvasPtr; /* Canvas containing itemPtr. */
Tk_Item *itemPtr; /* Item to check against point. */
double *pointPtr; /* Pointer to x and y coordinates. */
{
TextItem *textPtr = (TextItem *) itemPtr;
register TextLine *linePtr;
int i;
double xDiff, yDiff, dist, minDist;
/*
* Treat each line in the text item as a rectangle, compute the
* distance to that rectangle, and take the minimum of these
* distances. Perform most of the calculations in integer pixel
* units, since that's how the dimensions of the text are defined.
*/
minDist = -1.0;
for (linePtr = textPtr->linePtr, i = textPtr->numLines;
i > 0; linePtr++, i--) {
/*
* If the point is inside the line's rectangle, then can
* return immediately.
*/
if ((pointPtr[0] >= linePtr->x1)
&& (pointPtr[0] <= linePtr->x2)
&& (pointPtr[1] >= linePtr->y1)
&& (pointPtr[1] <= linePtr->y2)) {
return 0.0;
}
/*
* Point is outside line's rectangle; compute distance to nearest
* side.
*/
if (pointPtr[0] < linePtr->x1) {
xDiff = linePtr->x1 - pointPtr[0];
} else if (pointPtr[0] > linePtr->x2) {
xDiff = pointPtr[0] - linePtr->x2;
} else {
xDiff = 0;
}
if (pointPtr[1] < linePtr->y1) {
yDiff = linePtr->y1 - pointPtr[1];
} else if (pointPtr[1] > linePtr->y2) {
yDiff = pointPtr[1] - linePtr->y2;
} else {
yDiff = 0;
}
dist = hypot(xDiff, yDiff);
if ((dist < minDist) || (minDist < 0.0)) {
minDist = dist;
}
}
return minDist;
}
/*
*--------------------------------------------------------------
*
* TextToArea --
*
* This procedure is called to determine whether an item
* lies entirely inside, entirely outside, or overlapping
* a given rectangle.
*
* Results:
* -1 is returned if the item is entirely outside the area
* given by rectPtr, 0 if it overlaps, and 1 if it is entirely
* inside the given area.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
/* ARGSUSED */
static int
TextToArea(canvasPtr, itemPtr, rectPtr)
Tk_Canvas *canvasPtr; /* Canvas containing itemPtr. */
Tk_Item *itemPtr; /* Item to check against rectangle. */
double *rectPtr; /* Pointer to array of four coordinates
* (x1, y1, x2, y2) describing rectangular
* area. */
{
TextItem *textPtr = (TextItem *) itemPtr;
register TextLine *linePtr;
int i, result;
/*
* Scan the lines one at a time, seeing whether each line is
* entirely in, entirely out, or overlapping the rectangle. If
* an overlap is detected, return immediately; otherwise wait
* until all lines have been processed and see if they were all
* inside or all outside.
*/
result = 0;
for (linePtr = textPtr->linePtr, i = textPtr->numLines;
i > 0; linePtr++, i--) {
if ((rectPtr[2] < linePtr->x1) || (rectPtr[0] > linePtr->x2)
|| (rectPtr[3] < linePtr->y1) || (rectPtr[1] > linePtr->y2)) {
if (result == 1) {
return 0;
}
result = -1;
continue;
}
if ((linePtr->x1 < rectPtr[0]) || (linePtr->x2 > rectPtr[2])
|| (linePtr->y1 < rectPtr[1]) || (linePtr->y2 > rectPtr[3])) {
return 0;
}
if (result == -1) {
return 0;
}
result = 1;
}
return result;
}
/*
*--------------------------------------------------------------
*
* ScaleText --
*
* This procedure is invoked to rescale a text item.
*
* Results:
* None.
*
* Side effects:
* Scales the position of the text, but not the size
* of the font for the text.
*
*--------------------------------------------------------------
*/
/* ARGSUSED */
static void
ScaleText(canvasPtr, itemPtr, originX, originY, scaleX, scaleY)
Tk_Canvas *canvasPtr; /* Canvas containing rectangle. */
Tk_Item *itemPtr; /* Rectangle to be scaled. */
double originX, originY; /* Origin about which to scale rect. */
double scaleX; /* Amount to scale in X direction. */
double scaleY; /* Amount to scale in Y direction. */
{
register TextItem *textPtr = (TextItem *) itemPtr;
textPtr->x = originX + scaleX*(textPtr->x - originX);
textPtr->y = originY + scaleY*(textPtr->y - originY);
ComputeTextBbox(canvasPtr, textPtr);
return;
}
/*
*--------------------------------------------------------------
*
* TranslateText --
*
* This procedure is called to move a text item by a
* given amount.
*
* Results:
* None.
*
* Side effects:
* The position of the text item is offset by (xDelta, yDelta),
* and the bounding box is updated in the generic part of the
* item structure.
*
*--------------------------------------------------------------
*/
static void
TranslateText(canvasPtr, itemPtr, deltaX, deltaY)
Tk_Canvas *canvasPtr; /* Canvas containing item. */
Tk_Item *itemPtr; /* Item that is being moved. */
double deltaX, deltaY; /* Amount by which item is to be
* moved. */
{
register TextItem *textPtr = (TextItem *) itemPtr;
textPtr->x += deltaX;
textPtr->y += deltaY;
ComputeTextBbox(canvasPtr, textPtr);
}
/*
*--------------------------------------------------------------
*
* GetTextIndex --
*
* Parse an index into a text item and return either its value
* or an error.
*
* Results:
* A standard Tcl result. If all went well, then *indexPtr is
* filled in with the index (into itemPtr) corresponding to
* string. Otherwise an error message is left in
* canvasPtr->interp->result.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
static int
GetTextIndex(canvasPtr, itemPtr, string, indexPtr)
Tk_Canvas *canvasPtr; /* Canvas containing item. */
Tk_Item *itemPtr; /* Item for which the index is being
* specified. */
char *string; /* Specification of a particular character
* in itemPtr's text. */
int *indexPtr; /* Where to store converted index. */
{
register TextItem *textPtr = (TextItem *) itemPtr;
int length;
length = strlen(string);
if (string[0] == 'e') {
if (strncmp(string, "end", length) == 0) {
*indexPtr = textPtr->numChars;
} else {
badIndex:
/*
* Some of the paths here leave messages in
* canvasPtr->interp->result, so we have to clear it out
* before storing our own message.
*/
Tcl_SetResult(canvasPtr->interp, (char *) NULL, TCL_STATIC);
Tcl_AppendResult(canvasPtr->interp, "bad index \"", string,
"\"", (char *) NULL);
return TCL_ERROR;
}
} else if (string[0] == 'i') {
if (strncmp(string, "insert", length) == 0) {
*indexPtr = textPtr->insertPos;
} else {
goto badIndex;
}
} else if (string[0] == 's') {
if (canvasPtr->selItemPtr != itemPtr) {
canvasPtr->interp->result = "selection isn't in item";
return TCL_ERROR;
}
if (length < 5) {
goto badIndex;
}
if (strncmp(string, "sel.first", length) == 0) {
*indexPtr = canvasPtr->selectFirst;
} else if (strncmp(string, "sel.last", length) == 0) {
*indexPtr = canvasPtr->selectLast;
} else {
goto badIndex;
}
} else if (string[0] == '@') {
int x, y, dummy, i;
char *end, *p;
register TextLine *linePtr;
p = string+1;
x = strtol(p, &end, 0);
if ((end == p) || (*end != ',')) {
goto badIndex;
}
p = end+1;
y = strtol(p, &end, 0);
if ((end == p) || (*end != 0)) {
goto badIndex;
}
if ((textPtr->numChars == 0) || (y < textPtr->linePtr[0].y1)) {
*indexPtr = 0;
return TCL_OK;
}
for (i = 0, linePtr = textPtr->linePtr; ; i++, linePtr++) {
if (i >= textPtr->numLines) {
*indexPtr = textPtr->numChars;
return TCL_OK;
}
if (y <= linePtr->y2) {
break;
}
}
*indexPtr = TkMeasureChars(textPtr->fontPtr, linePtr->firstChar,
linePtr->numChars, linePtr->x, x, 0, &dummy);
*indexPtr += linePtr->firstChar - textPtr->text;
} else {
if (Tcl_GetInt(canvasPtr->interp, string, indexPtr) != TCL_OK) {
goto badIndex;
}
if (*indexPtr < 0){
*indexPtr = 0;
} else if (*indexPtr > textPtr->numChars) {
*indexPtr = textPtr->numChars;
}
}
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* SetTextCursor --
*
* Set the position of the insertion cursor in this item.
*
* Results:
* None.
*
* Side effects:
* The cursor position will change.
*
*--------------------------------------------------------------
*/
/* ARGSUSED */
static void
SetTextCursor(canvasPtr, itemPtr, index)
Tk_Canvas *canvasPtr; /* Record describing canvas widget. */
Tk_Item *itemPtr; /* Text item in which cursor position
* is to be set. */
int index; /* Index of character just before which
* cursor is to be positioned. */
{
register TextItem *textPtr = (TextItem *) itemPtr;
if (index < 0) {
textPtr->insertPos = 0;
} else if (index > textPtr->numChars) {
textPtr->insertPos = textPtr->numChars;
} else {
textPtr->insertPos = index;
}
}
/*
*--------------------------------------------------------------
*
* GetSelText --
*
* This procedure is invoked to return the selected portion
* of a text item. It is only called when this item has
* the selection.
*
* Results:
* The return value is the number of non-NULL bytes stored
* at buffer. Buffer is filled (or partially filled) with a
* NULL-terminated string containing part or all of the selection,
* as given by offset and maxBytes.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
static int
GetSelText(canvasPtr, itemPtr, offset, buffer, maxBytes)
Tk_Canvas *canvasPtr; /* Canvas containing selection. */
Tk_Item *itemPtr; /* Text item containing selection. */
int offset; /* Offset within selection of first
* character to be returned. */
char *buffer; /* Location in which to place
* selection. */
int maxBytes; /* Maximum number of bytes to place
* at buffer, not including terminating
* NULL character. */
{
TextItem *textPtr = (TextItem *) itemPtr;
int count;
count = canvasPtr->selectLast + 1 - canvasPtr->selectFirst - offset;
if (canvasPtr->selectLast == textPtr->numChars) {
count -= 1;
}
if (count > maxBytes) {
count = maxBytes;
}
if (count <= 0) {
return 0;
}
strncpy(buffer, textPtr->text + canvasPtr->selectFirst + offset, count);
buffer[count] = '\0';
return count;
}
/*
*--------------------------------------------------------------
*
* TextToPostscript --
*
* This procedure is called to generate Postscript for
* text items.
*
* Results:
* The return value is a standard Tcl result. If an error
* occurs in generating Postscript then an error message is
* left in canvasPtr->interp->result, replacing whatever used
* to be there. If no error occurs, then Postscript for the
* item is appended to the result.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
static int
TextToPostscript(canvasPtr, itemPtr, psInfoPtr)
Tk_Canvas *canvasPtr; /* Information about overall canvas. */
Tk_Item *itemPtr; /* Item for which Postscript is
* wanted. */
Tk_PostscriptInfo *psInfoPtr; /* Information about the Postscript;
* must be passed back to Postscript
* utility procedures. */
{
register TextItem *textPtr = (TextItem *) itemPtr;
register TextLine *linePtr;
int i;
char *xoffset = NULL, *yoffset = NULL; /* Initializations needed */
char *justify = NULL; /* only to stop compiler
* warnings. */
char buffer[500];
if (textPtr->color == NULL) {
return TCL_OK;
}
if (TkCanvPsFont(canvasPtr, psInfoPtr, textPtr->fontPtr) != TCL_OK) {
return TCL_ERROR;
}
if (TkCanvPsColor(canvasPtr, psInfoPtr, textPtr->color) != TCL_OK) {
return TCL_ERROR;
}
sprintf(buffer, "%.15g %.15g [\n", textPtr->x,
TkCanvPsY(psInfoPtr, textPtr->y));
Tcl_AppendResult(canvasPtr->interp, buffer, (char *) NULL);
for (i = textPtr->numLines, linePtr = textPtr->linePtr;
i > 0; i--, linePtr++) {
Tcl_AppendResult(canvasPtr->interp, " ", (char *) NULL);
LineToPostscript(canvasPtr->interp, linePtr->firstChar,
linePtr->numChars);
Tcl_AppendResult(canvasPtr->interp, "\n", (char *) NULL);
}
switch (textPtr->anchor) {
case TK_ANCHOR_NW: xoffset = "0"; yoffset = "0"; break;
case TK_ANCHOR_N: xoffset = "-0.5"; yoffset = "0"; break;
case TK_ANCHOR_NE: xoffset = "-1"; yoffset = "0"; break;
case TK_ANCHOR_E: xoffset = "-1"; yoffset = "0.5"; break;
case TK_ANCHOR_SE: xoffset = "-1"; yoffset = "1"; break;
case TK_ANCHOR_S: xoffset = "-0.5"; yoffset = "1"; break;
case TK_ANCHOR_SW: xoffset = "0"; yoffset = "1"; break;
case TK_ANCHOR_W: xoffset = "0"; yoffset = "0.5"; break;
case TK_ANCHOR_CENTER: xoffset = "-0.5"; yoffset = "0.5"; break;
}
switch (textPtr->justify) {
case TK_JUSTIFY_LEFT: justify = "0"; break;
case TK_JUSTIFY_FILL:
case TK_JUSTIFY_CENTER: justify = "0.5"; break;
case TK_JUSTIFY_RIGHT: justify = "1"; break;
}
sprintf(buffer, "] %d %s %s %s () false DrawText\n",
textPtr->fontPtr->ascent + textPtr->fontPtr->descent,
xoffset, yoffset, justify);
Tcl_AppendResult(canvasPtr->interp, buffer, (char *) NULL);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* LineToPostscript --
*
* This procedure generates a parenthesized Postscript string
* describing one line of text from a text item.
*
* Results:
* None. The parenthesized string is appended to
* interp->result. It generates proper backslash notation so
* that Postscript can interpret the string correctly.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
static void
LineToPostscript(interp, string, numChars)
Tcl_Interp *interp; /* Interp whose result is to be appended to. */
register char *string; /* String to Postscript-ify. */
int numChars; /* Number of characters in the string. */
{
#define BUFFER_SIZE 100
char buffer[BUFFER_SIZE+5];
int used, c;
buffer[0] = '(';
used = 1;
for ( ; numChars > 0; string++, numChars--) {
c = (*string) & 0xff;
if ((c == '(') || (c == ')') || (c == '\\') || (c < 0x20)
|| (c >= 0x7f)) {
/*
* Tricky point: the "03" is necessary in the sprintf below,
* so that a full three digits of octal are always generated.
* Without the "03", a number following this sequence could
* be interpreted by Postscript as part of this sequence.
*/
sprintf(buffer+used, "\\%03o", c);
used += strlen(buffer+used);
} else {
buffer[used] = c;
used++;
}
if (used >= BUFFER_SIZE) {
buffer[used] = 0;
Tcl_AppendResult(interp, buffer, (char *) NULL);
used = 0;
}
}
buffer[used] = ')';
buffer[used+1] = 0;
Tcl_AppendResult(interp, buffer, (char *) NULL);
}
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