tkCanvText.c
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- /*
- * tkCanvText.c --
- *
- * This file implements text items for canvas widgets.
- *
- * Copyright (c) 1991-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * RCS: @(#) $Id: tkCanvText.c,v 1.15.2.3 2007/04/29 02:24:01 das Exp $
- */
- #include <stdio.h>
- #include "tkInt.h"
- #include "tkCanvas.h"
- #include "tkPort.h"
- #include "default.h"
- /*
- * 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. */
- Tk_CanvasTextInfo *textInfoPtr;
- /* Pointer to a structure containing
- * information about the selection and
- * insertion cursor. The structure is owned
- * by (and shared with) the generic canvas
- * code. */
- /*
- * Fields that are set by widget commands other than "configure".
- */
-
- double x, y; /* Positioning point for text. */
- int insertPos; /* Character index of character just before
- * which the insertion cursor is displayed. */
- /*
- * Configuration settings that are updated by Tk_ConfigureWidget.
- */
- Tk_Anchor anchor; /* Where to anchor text relative to (x,y). */
- Tk_TSOffset tsoffset;
- XColor *color; /* Color for text. */
- XColor *activeColor; /* Color for text. */
- XColor *disabledColor; /* Color for text. */
- Tk_Font tkfont; /* Font for drawing text. */
- Tk_Justify justify; /* Justification mode for text. */
- Pixmap stipple; /* Stipple bitmap for text, or None. */
- Pixmap activeStipple; /* Stipple bitmap for text, or None. */
- Pixmap disabledStipple; /* Stipple bitmap for text, or None. */
- char *text; /* Text for item (malloc-ed). */
- int width; /* Width of lines for word-wrap, pixels.
- * Zero means no word-wrap. */
- /*
- * Fields whose values are derived from the current values of the
- * configuration settings above.
- */
- int numChars; /* Length of text in characters. */
- int numBytes; /* Length of text in bytes. */
- Tk_TextLayout textLayout; /* Cached text layout information. */
- int leftEdge; /* Pixel location of the left edge of the
- * text item; where the left border of the
- * text layout is drawn. */
- int rightEdge; /* Pixel just to right of right edge of
- * area of text item. Used for selecting up
- * to end of line. */
- GC gc; /* Graphics context for drawing text. */
- GC selTextGC; /* Graphics context for selected text. */
- GC cursorOffGC; /* If not None, this gives a graphics context
- * to use to draw the insertion cursor when
- * it's off. Used if the selection and
- * insertion cursor colors are the same. */
- } TextItem;
- /*
- * Information used for parsing configuration specs:
- */
- static Tk_CustomOption stateOption = {
- (Tk_OptionParseProc *) TkStateParseProc,
- TkStatePrintProc, (ClientData) 2
- };
- static Tk_CustomOption tagsOption = {
- (Tk_OptionParseProc *) Tk_CanvasTagsParseProc,
- Tk_CanvasTagsPrintProc, (ClientData) NULL
- };
- static Tk_CustomOption offsetOption = {
- (Tk_OptionParseProc *) TkOffsetParseProc,
- TkOffsetPrintProc, (ClientData) (TK_OFFSET_RELATIVE)
- };
- static Tk_ConfigSpec configSpecs[] = {
- {TK_CONFIG_COLOR, "-activefill", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TextItem, activeColor), TK_CONFIG_NULL_OK},
- {TK_CONFIG_BITMAP, "-activestipple", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TextItem, activeStipple), TK_CONFIG_NULL_OK},
- {TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL,
- "center", Tk_Offset(TextItem, anchor),
- TK_CONFIG_DONT_SET_DEFAULT},
- {TK_CONFIG_COLOR, "-disabledfill", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TextItem, disabledColor), TK_CONFIG_NULL_OK},
- {TK_CONFIG_BITMAP, "-disabledstipple", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TextItem, disabledStipple), TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-fill", (char *) NULL, (char *) NULL,
- "black", Tk_Offset(TextItem, color), TK_CONFIG_NULL_OK},
- {TK_CONFIG_FONT, "-font", (char *) NULL, (char *) NULL,
- DEF_CANVTEXT_FONT, Tk_Offset(TextItem, tkfont), 0},
- {TK_CONFIG_JUSTIFY, "-justify", (char *) NULL, (char *) NULL,
- "left", Tk_Offset(TextItem, justify),
- TK_CONFIG_DONT_SET_DEFAULT},
- {TK_CONFIG_CUSTOM, "-offset", (char *) NULL, (char *) NULL,
- "0,0", Tk_Offset(TextItem, tsoffset),
- TK_CONFIG_DONT_SET_DEFAULT, &offsetOption},
- {TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK,
- &stateOption},
- {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, &tagsOption},
- {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 canvas,
- TextItem *textPtr));
- static int ConfigureText _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
- Tcl_Obj *CONST objv[], int flags));
- static int CreateText _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, struct Tk_Item *itemPtr,
- int argc, Tcl_Obj *CONST objv[]));
- static void DeleteText _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, Display *display));
- static void DisplayCanvText _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, Display *display, Drawable dst,
- int x, int y, int width, int height));
- static int GetSelText _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, int offset, char *buffer,
- int maxBytes));
- static int GetTextIndex _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, Tk_Item *itemPtr,
- Tcl_Obj *obj, int *indexPtr));
- static void ScaleText _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double originX, double originY,
- double scaleX, double scaleY));
- static void SetTextCursor _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, int index));
- static int TextCoords _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, Tk_Item *itemPtr,
- int argc, Tcl_Obj *CONST objv[]));
- static void TextDeleteChars _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, int first, int last));
- static void TextInsert _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, int beforeThis, char *string));
- static int TextToArea _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double *rectPtr));
- static double TextToPoint _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double *pointPtr));
- static int TextToPostscript _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, Tk_Item *itemPtr, int prepass));
- static void TranslateText _ANSI_ARGS_((Tk_Canvas canvas,
- 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 */
- DisplayCanvText, /* displayProc */
- TK_CONFIG_OBJS, /* flags */
- TextToPoint, /* pointProc */
- TextToArea, /* areaProc */
- TextToPostscript, /* postscriptProc */
- ScaleText, /* scaleProc */
- TranslateText, /* translateProc */
- (Tk_ItemIndexProc *) 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
- * the interp's 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(interp, canvas, itemPtr, objc, objv)
- Tcl_Interp *interp; /* Interpreter for error reporting. */
- Tk_Canvas canvas; /* Canvas to hold new item. */
- Tk_Item *itemPtr; /* Record to hold new item; header has been
- * initialized by caller. */
- int objc; /* Number of arguments in objv. */
- Tcl_Obj *CONST objv[]; /* Arguments describing rectangle. */
- {
- TextItem *textPtr = (TextItem *) itemPtr;
- int i;
- if (objc == 0) {
- panic("canvas did not pass any coordsn");
- }
- /*
- * Carry out initialization that is needed in order to clean up after
- * errors during the the remainder of this procedure.
- */
- textPtr->textInfoPtr = Tk_CanvasGetTextInfo(canvas);
- textPtr->insertPos = 0;
- textPtr->anchor = TK_ANCHOR_CENTER;
- textPtr->tsoffset.flags = 0;
- textPtr->tsoffset.xoffset = 0;
- textPtr->tsoffset.yoffset = 0;
- textPtr->color = NULL;
- textPtr->activeColor = NULL;
- textPtr->disabledColor = NULL;
- textPtr->tkfont = NULL;
- textPtr->justify = TK_JUSTIFY_LEFT;
- textPtr->stipple = None;
- textPtr->activeStipple = None;
- textPtr->disabledStipple = None;
- textPtr->text = NULL;
- textPtr->width = 0;
- textPtr->numChars = 0;
- textPtr->numBytes = 0;
- textPtr->textLayout = NULL;
- textPtr->leftEdge = 0;
- textPtr->rightEdge = 0;
- textPtr->gc = None;
- textPtr->selTextGC = None;
- textPtr->cursorOffGC = None;
- /*
- * Process the arguments to fill in the item record.
- * Only 1 (list) or 2 (x y) coords are allowed.
- */
- if (objc == 1) {
- i = 1;
- } else {
- char *arg = Tcl_GetString(objv[1]);
- i = 2;
- if ((arg[0] == '-') && (arg[1] >= 'a') && (arg[1] <= 'z')) {
- i = 1;
- }
- }
- if ((TextCoords(interp, canvas, itemPtr, i, objv) != TCL_OK)) {
- goto error;
- }
- if (ConfigureText(interp, canvas, itemPtr, objc-i, objv+i, 0) == TCL_OK) {
- return TCL_OK;
- }
- error:
- DeleteText(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
- return TCL_ERROR;
- }
- /*
- *--------------------------------------------------------------
- *
- * 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 the interp's result.
- *
- * Side effects:
- * The coordinates for the given item may be changed.
- *
- *--------------------------------------------------------------
- */
- static int
- TextCoords(interp, canvas, itemPtr, objc, objv)
- Tcl_Interp *interp; /* Used for error reporting. */
- Tk_Canvas canvas; /* Canvas containing item. */
- Tk_Item *itemPtr; /* Item whose coordinates are to be read or
- * modified. */
- int objc; /* Number of coordinates supplied in objv. */
- Tcl_Obj *CONST objv[]; /* Array of coordinates: x1, y1, x2, y2, ... */
- {
- TextItem *textPtr = (TextItem *) itemPtr;
- if (objc == 0) {
- Tcl_Obj *obj = Tcl_NewObj();
- Tcl_Obj *subobj = Tcl_NewDoubleObj(textPtr->x);
- Tcl_ListObjAppendElement(interp, obj, subobj);
- subobj = Tcl_NewDoubleObj(textPtr->y);
- Tcl_ListObjAppendElement(interp, obj, subobj);
- Tcl_SetObjResult(interp, obj);
- } else if (objc < 3) {
- if (objc==1) {
- if (Tcl_ListObjGetElements(interp, objv[0], &objc,
- (Tcl_Obj ***) &objv) != TCL_OK) {
- return TCL_ERROR;
- } else if (objc != 2) {
- char buf[64 + TCL_INTEGER_SPACE];
- sprintf(buf, "wrong # coordinates: expected 2, got %d", objc);
- Tcl_SetResult(interp, buf, TCL_VOLATILE);
- return TCL_ERROR;
- }
- }
- if ((Tk_CanvasGetCoordFromObj(interp, canvas, objv[0], &textPtr->x) != TCL_OK)
- || (Tk_CanvasGetCoordFromObj(interp, canvas, objv[1],
- &textPtr->y) != TCL_OK)) {
- return TCL_ERROR;
- }
- ComputeTextBbox(canvas, textPtr);
- } else {
- char buf[64 + TCL_INTEGER_SPACE];
-
- sprintf(buf, "wrong # coordinates: expected 0 or 2, got %d", objc);
- Tcl_SetResult(interp, buf, TCL_VOLATILE);
- 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 the interp's result.
- *
- * Side effects:
- * Configuration information, such as colors and stipple
- * patterns, may be set for itemPtr.
- *
- *--------------------------------------------------------------
- */
- static int
- ConfigureText(interp, canvas, itemPtr, objc, objv, flags)
- Tcl_Interp *interp; /* Interpreter for error reporting. */
- Tk_Canvas canvas; /* Canvas containing itemPtr. */
- Tk_Item *itemPtr; /* Rectangle item to reconfigure. */
- int objc; /* Number of elements in objv. */
- Tcl_Obj *CONST objv[]; /* Arguments describing things to configure. */
- int flags; /* Flags to pass to Tk_ConfigureWidget. */
- {
- TextItem *textPtr = (TextItem *) itemPtr;
- XGCValues gcValues;
- GC newGC, newSelGC;
- unsigned long mask;
- Tk_Window tkwin;
- Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr;
- XColor *selBgColorPtr;
- XColor *color;
- Pixmap stipple;
- Tk_State state;
- tkwin = Tk_CanvasTkwin(canvas);
- if (TCL_OK != Tk_ConfigureWidget(interp, tkwin, configSpecs, objc,
- (CONST char **) objv, (char *) textPtr, flags|TK_CONFIG_OBJS)) {
- return TCL_ERROR;
- }
- /*
- * A few of the options require additional processing, such as
- * graphics contexts.
- */
- state = itemPtr->state;
- if (textPtr->activeColor != NULL ||
- textPtr->activeStipple != None) {
- itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT;
- } else {
- itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT;
- }
- if(state == TK_STATE_NULL) {
- state = ((TkCanvas *)canvas)->canvas_state;
- }
- color = textPtr->color;
- stipple = textPtr->stipple;
- if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
- if (textPtr->activeColor!=NULL) {
- color = textPtr->activeColor;
- }
- if (textPtr->activeStipple!=None) {
- stipple = textPtr->activeStipple;
- }
- } else if (state==TK_STATE_DISABLED) {
- if (textPtr->disabledColor!=NULL) {
- color = textPtr->disabledColor;
- }
- if (textPtr->disabledStipple!=None) {
- stipple = textPtr->disabledStipple;
- }
- }
- newGC = newSelGC = None;
- if (textPtr->tkfont != NULL) {
- gcValues.font = Tk_FontId(textPtr->tkfont);
- mask = GCFont;
- if (color != NULL) {
- gcValues.foreground = color->pixel;
- mask |= GCForeground;
- if (stipple != None) {
- gcValues.stipple = stipple;
- gcValues.fill_style = FillStippled;
- mask |= GCStipple|GCFillStyle;
- }
- newGC = Tk_GetGC(tkwin, mask, &gcValues);
- }
- mask &= ~(GCTile|GCFillStyle|GCStipple);
- if (stipple != None) {
- gcValues.stipple = stipple;
- gcValues.fill_style = FillStippled;
- mask |= GCStipple|GCFillStyle;
- }
- if (textInfoPtr->selFgColorPtr != NULL) {
- gcValues.foreground = textInfoPtr->selFgColorPtr->pixel;
- }
- newSelGC = Tk_GetGC(tkwin, mask|GCForeground, &gcValues);
- }
- if (textPtr->gc != None) {
- Tk_FreeGC(Tk_Display(tkwin), textPtr->gc);
- }
- textPtr->gc = newGC;
- if (textPtr->selTextGC != None) {
- Tk_FreeGC(Tk_Display(tkwin), textPtr->selTextGC);
- }
- textPtr->selTextGC = newSelGC;
- selBgColorPtr = Tk_3DBorderColor(textInfoPtr->selBorder);
- if (Tk_3DBorderColor(textInfoPtr->insertBorder)->pixel
- == selBgColorPtr->pixel) {
- if (selBgColorPtr->pixel == BlackPixelOfScreen(Tk_Screen(tkwin))) {
- gcValues.foreground = WhitePixelOfScreen(Tk_Screen(tkwin));
- } else {
- gcValues.foreground = BlackPixelOfScreen(Tk_Screen(tkwin));
- }
- newGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
- } else {
- newGC = None;
- }
- if (textPtr->cursorOffGC != None) {
- Tk_FreeGC(Tk_Display(tkwin), textPtr->cursorOffGC);
- }
- textPtr->cursorOffGC = newGC;
- /*
- * If the text was changed, move the selection and insertion indices
- * to keep them inside the item.
- */
- textPtr->numBytes = strlen(textPtr->text);
- textPtr->numChars = Tcl_NumUtfChars(textPtr->text, textPtr->numBytes);
- if (textInfoPtr->selItemPtr == itemPtr) {
-
- if (textInfoPtr->selectFirst >= textPtr->numChars) {
- textInfoPtr->selItemPtr = NULL;
- } else {
- if (textInfoPtr->selectLast >= textPtr->numChars) {
- textInfoPtr->selectLast = textPtr->numChars - 1;
- }
- if ((textInfoPtr->anchorItemPtr == itemPtr)
- && (textInfoPtr->selectAnchor >= textPtr->numChars)) {
- textInfoPtr->selectAnchor = textPtr->numChars - 1;
- }
- }
- }
- if (textPtr->insertPos >= textPtr->numChars) {
- textPtr->insertPos = textPtr->numChars;
- }
- ComputeTextBbox(canvas, 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(canvas, itemPtr, display)
- Tk_Canvas canvas; /* Info about overall canvas widget. */
- Tk_Item *itemPtr; /* Item that is being deleted. */
- Display *display; /* Display containing window for canvas. */
- {
- TextItem *textPtr = (TextItem *) itemPtr;
- if (textPtr->color != NULL) {
- Tk_FreeColor(textPtr->color);
- }
- if (textPtr->activeColor != NULL) {
- Tk_FreeColor(textPtr->activeColor);
- }
- if (textPtr->disabledColor != NULL) {
- Tk_FreeColor(textPtr->disabledColor);
- }
- Tk_FreeFont(textPtr->tkfont);
- if (textPtr->stipple != None) {
- Tk_FreeBitmap(display, textPtr->stipple);
- }
- if (textPtr->activeStipple != None) {
- Tk_FreeBitmap(display, textPtr->activeStipple);
- }
- if (textPtr->disabledStipple != None) {
- Tk_FreeBitmap(display, textPtr->disabledStipple);
- }
- if (textPtr->text != NULL) {
- ckfree(textPtr->text);
- }
- Tk_FreeTextLayout(textPtr->textLayout);
- if (textPtr->gc != None) {
- Tk_FreeGC(display, textPtr->gc);
- }
- if (textPtr->selTextGC != None) {
- Tk_FreeGC(display, textPtr->selTextGC);
- }
- if (textPtr->cursorOffGC != None) {
- Tk_FreeGC(display, textPtr->cursorOffGC);
- }
- }
- /*
- *--------------------------------------------------------------
- *
- * 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(canvas, textPtr)
- Tk_Canvas canvas; /* Canvas that contains item. */
- TextItem *textPtr; /* Item whose bbox is to be recomputed. */
- {
- Tk_CanvasTextInfo *textInfoPtr;
- int leftX, topY, width, height, fudge;
- Tk_State state = textPtr->header.state;
- if(state == TK_STATE_NULL) {
- state = ((TkCanvas *)canvas)->canvas_state;
- }
- Tk_FreeTextLayout(textPtr->textLayout);
- textPtr->textLayout = Tk_ComputeTextLayout(textPtr->tkfont,
- textPtr->text, textPtr->numChars, textPtr->width,
- textPtr->justify, 0, &width, &height);
- if (state == TK_STATE_HIDDEN || textPtr->color == NULL) {
- width = height = 0;
- }
- /*
- * Use overall geometry information to compute the top-left corner
- * of the bounding box for the text item.
- */
- leftX = (int) floor(textPtr->x + 0.5);
- topY = (int) floor(textPtr->y + 0.5);
- 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 -= height / 2;
- break;
- case TK_ANCHOR_SW:
- case TK_ANCHOR_S:
- case TK_ANCHOR_SE:
- topY -= height;
- 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 -= width / 2;
- break;
- case TK_ANCHOR_NE:
- case TK_ANCHOR_E:
- case TK_ANCHOR_SE:
- leftX -= width;
- break;
- }
- textPtr->leftEdge = leftX;
- textPtr->rightEdge = leftX + width;
- /*
- * 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).
- */
- textInfoPtr = textPtr->textInfoPtr;
- fudge = (textInfoPtr->insertWidth + 1) / 2;
- if (textInfoPtr->selBorderWidth > fudge) {
- fudge = textInfoPtr->selBorderWidth;
- }
- textPtr->header.x1 = leftX - fudge;
- textPtr->header.y1 = topY;
- textPtr->header.x2 = leftX + width + fudge;
- textPtr->header.y2 = topY + height;
- }
- /*
- *--------------------------------------------------------------
- *
- * DisplayCanvText --
- *
- * 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 canvas.
- *
- *--------------------------------------------------------------
- */
- static void
- DisplayCanvText(canvas, itemPtr, display, drawable, x, y, width, height)
- Tk_Canvas canvas; /* Canvas that contains item. */
- Tk_Item *itemPtr; /* Item to be displayed. */
- Display *display; /* Display on which to draw item. */
- Drawable drawable; /* Pixmap or window in which to draw item. */
- int x, y, width, height; /* Describes region of canvas that must be
- * redisplayed (not used). */
- {
- TextItem *textPtr;
- Tk_CanvasTextInfo *textInfoPtr;
- int selFirstChar, selLastChar;
- short drawableX, drawableY;
- Pixmap stipple;
- Tk_State state = itemPtr->state;
- textPtr = (TextItem *) itemPtr;
- textInfoPtr = textPtr->textInfoPtr;
- if(state == TK_STATE_NULL) {
- state = ((TkCanvas *)canvas)->canvas_state;
- }
- stipple = textPtr->stipple;
- if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
- if (textPtr->activeStipple!=None) {
- stipple = textPtr->activeStipple;
- }
- } else if (state==TK_STATE_DISABLED) {
- if (textPtr->disabledStipple!=None) {
- stipple = textPtr->disabledStipple;
- }
- }
- 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 (stipple != None) {
- Tk_CanvasSetOffset(canvas, textPtr->gc, &textPtr->tsoffset);
- }
- selFirstChar = -1;
- selLastChar = 0; /* lint. */
- if (textInfoPtr->selItemPtr == itemPtr) {
- selFirstChar = textInfoPtr->selectFirst;
- selLastChar = textInfoPtr->selectLast;
- if (selLastChar > textPtr->numChars) {
- selLastChar = textPtr->numChars - 1;
- }
- if ((selFirstChar >= 0) && (selFirstChar <= selLastChar)) {
- int xFirst, yFirst, hFirst;
- int xLast, yLast, wLast;
- /*
- * Draw a special background under the selection.
- */
- Tk_CharBbox(textPtr->textLayout, selFirstChar, &xFirst, &yFirst,
- NULL, &hFirst);
- Tk_CharBbox(textPtr->textLayout, selLastChar, &xLast, &yLast,
- &wLast, NULL);
- /*
- * 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.
- */
- x = xFirst;
- height = hFirst;
- for (y = yFirst ; y <= yLast; y += height) {
- if (y == yLast) {
- width = xLast + wLast - x;
- } else {
- width = textPtr->rightEdge - textPtr->leftEdge - x;
- }
- Tk_CanvasDrawableCoords(canvas,
- (double) (textPtr->leftEdge + x
- - textInfoPtr->selBorderWidth),
- (double) (textPtr->header.y1 + y),
- &drawableX, &drawableY);
- Tk_Fill3DRectangle(Tk_CanvasTkwin(canvas), drawable,
- textInfoPtr->selBorder, drawableX, drawableY,
- width + 2 * textInfoPtr->selBorderWidth,
- height, textInfoPtr->selBorderWidth, TK_RELIEF_RAISED);
- x = 0;
- }
- }
- }
- /*
- * If the insertion point should be displayed, 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 ((textInfoPtr->focusItemPtr == itemPtr) && (textInfoPtr->gotFocus)) {
- if (Tk_CharBbox(textPtr->textLayout, textPtr->insertPos,
- &x, &y, NULL, &height)) {
- Tk_CanvasDrawableCoords(canvas,
- (double) (textPtr->leftEdge + x
- - (textInfoPtr->insertWidth / 2)),
- (double) (textPtr->header.y1 + y),
- &drawableX, &drawableY);
- Tk_SetCaretPos(Tk_CanvasTkwin(canvas), drawableX, drawableY,
- height);
- if (textInfoPtr->cursorOn) {
- Tk_Fill3DRectangle(Tk_CanvasTkwin(canvas), drawable,
- textInfoPtr->insertBorder,
- drawableX, drawableY,
- textInfoPtr->insertWidth, height,
- textInfoPtr->insertBorderWidth, TK_RELIEF_RAISED);
- } else if (textPtr->cursorOffGC != None) {
- /*
- * Redraw the background over the area of the cursor,
- * even though the cursor is turned off. This
- * guarantees that the selection won't make the cursor
- * invisible on mono displays, where both may be drawn
- * in the same color.
- */
- XFillRectangle(display, drawable, textPtr->cursorOffGC,
- drawableX, drawableY,
- (unsigned) textInfoPtr->insertWidth,
- (unsigned) height);
- }
- }
- }
- /*
- * If there is no selected text or the selected text foreground
- * is the same as the regular text foreground, then draw one
- * text string. If there is selected text and the foregrounds
- * differ, draw the regular text up to the selection, draw
- * the selection, then draw the rest of the regular text.
- * Drawing the regular text and then the selected text over
- * it would causes problems with anti-aliased text because the
- * two anti-aliasing colors would blend together.
- */
- Tk_CanvasDrawableCoords(canvas, (double) textPtr->leftEdge,
- (double) textPtr->header.y1, &drawableX, &drawableY);
- if ((selFirstChar >= 0) && (textPtr->selTextGC != textPtr->gc)) {
- Tk_DrawTextLayout(display, drawable, textPtr->gc, textPtr->textLayout,
- drawableX, drawableY, 0, selFirstChar);
- Tk_DrawTextLayout(display, drawable, textPtr->selTextGC,
- textPtr->textLayout, drawableX, drawableY, selFirstChar,
- selLastChar + 1);
- Tk_DrawTextLayout(display, drawable, textPtr->gc, textPtr->textLayout,
- drawableX, drawableY, selLastChar + 1, -1);
- } else {
- Tk_DrawTextLayout(display, drawable, textPtr->gc, textPtr->textLayout,
- drawableX, drawableY, 0, -1);
- }
- if (stipple != None) {
- XSetTSOrigin(display, textPtr->gc, 0, 0);
- }
- }
- /*
- *--------------------------------------------------------------
- *
- * TextInsert --
- *
- * Insert characters into a text item at a given position.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The text in the given item is modified. The cursor and
- * selection positions are also modified to reflect the
- * insertion.
- *
- *--------------------------------------------------------------
- */
- static void
- TextInsert(canvas, itemPtr, index, string)
- Tk_Canvas canvas; /* Canvas containing text item. */
- Tk_Item *itemPtr; /* Text item to be modified. */
- int index; /* Character index before which string is
- * to be inserted. */
- char *string; /* New characters to be inserted. */
- {
- TextItem *textPtr = (TextItem *) itemPtr;
- int byteIndex, byteCount, charsAdded;
- char *new, *text;
- Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr;
- string = Tcl_GetStringFromObj((Tcl_Obj *) string, &byteCount);
- text = textPtr->text;
- if (index < 0) {
- index = 0;
- }
- if (index > textPtr->numChars) {
- index = textPtr->numChars;
- }
- byteIndex = Tcl_UtfAtIndex(text, index) - text;
- byteCount = strlen(string);
- if (byteCount == 0) {
- return;
- }
- new = (char *) ckalloc((unsigned) textPtr->numBytes + byteCount + 1);
- memcpy(new, text, (size_t) byteIndex);
- strcpy(new + byteIndex, string);
- strcpy(new + byteIndex + byteCount, text + byteIndex);
- ckfree(text);
- textPtr->text = new;
- charsAdded = Tcl_NumUtfChars(string, byteCount);
- textPtr->numChars += charsAdded;
- textPtr->numBytes += byteCount;
- /*
- * Inserting characters invalidates indices such as those for the
- * selection and cursor. Update the indices appropriately.
- */
- if (textInfoPtr->selItemPtr == itemPtr) {
- if (textInfoPtr->selectFirst >= index) {
- textInfoPtr->selectFirst += charsAdded;
- }
- if (textInfoPtr->selectLast >= index) {
- textInfoPtr->selectLast += charsAdded;
- }
- if ((textInfoPtr->anchorItemPtr == itemPtr)
- && (textInfoPtr->selectAnchor >= index)) {
- textInfoPtr->selectAnchor += charsAdded;
- }
- }
- if (textPtr->insertPos >= index) {
- textPtr->insertPos += charsAdded;
- }
- ComputeTextBbox(canvas, textPtr);
- }
- /*
- *--------------------------------------------------------------
- *
- * TextDeleteChars --
- *
- * Delete one or more characters from a text item.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Characters between "first" and "last", inclusive, get
- * deleted from itemPtr, and things like the selection
- * position get updated.
- *
- *--------------------------------------------------------------
- */
- static void
- TextDeleteChars(canvas, itemPtr, first, last)
- Tk_Canvas canvas; /* Canvas containing itemPtr. */
- Tk_Item *itemPtr; /* Item in which to delete characters. */
- int first; /* Character index of first character to
- * delete. */
- int last; /* Character index of last character to
- * delete (inclusive). */
- {
- TextItem *textPtr = (TextItem *) itemPtr;
- int byteIndex, byteCount, charsRemoved;
- char *new, *text;
- Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr;
- text = textPtr->text;
- if (first < 0) {
- first = 0;
- }
- if (last >= textPtr->numChars) {
- last = textPtr->numChars - 1;
- }
- if (first > last) {
- return;
- }
- charsRemoved = last + 1 - first;
- byteIndex = Tcl_UtfAtIndex(text, first) - text;
- byteCount = Tcl_UtfAtIndex(text + byteIndex, charsRemoved)
- - (text + byteIndex);
-
- new = (char *) ckalloc((unsigned) (textPtr->numBytes + 1 - byteCount));
- memcpy(new, text, (size_t) byteIndex);
- strcpy(new + byteIndex, text + byteIndex + byteCount);
- ckfree(text);
- textPtr->text = new;
- textPtr->numChars -= charsRemoved;
- textPtr->numBytes -= byteCount;
- /*
- * Update indexes for the selection and cursor to reflect the
- * renumbering of the remaining characters.
- */
- if (textInfoPtr->selItemPtr == itemPtr) {
- if (textInfoPtr->selectFirst > first) {
- textInfoPtr->selectFirst -= charsRemoved;
- if (textInfoPtr->selectFirst < first) {
- textInfoPtr->selectFirst = first;
- }
- }
- if (textInfoPtr->selectLast >= first) {
- textInfoPtr->selectLast -= charsRemoved;
- if (textInfoPtr->selectLast < first - 1) {
- textInfoPtr->selectLast = first - 1;
- }
- }
- if (textInfoPtr->selectFirst > textInfoPtr->selectLast) {
- textInfoPtr->selItemPtr = NULL;
- }
- if ((textInfoPtr->anchorItemPtr == itemPtr)
- && (textInfoPtr->selectAnchor > first)) {
- textInfoPtr->selectAnchor -= charsRemoved;
- if (textInfoPtr->selectAnchor < first) {
- textInfoPtr->selectAnchor = first;
- }
- }
- }
- if (textPtr->insertPos > first) {
- textPtr->insertPos -= charsRemoved;
- if (textPtr->insertPos < first) {
- textPtr->insertPos = first;
- }
- }
- ComputeTextBbox(canvas, textPtr);
- return;
- }
- /*
- *--------------------------------------------------------------
- *
- * 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 text item. If
- * the point isn't inside the text item then the return value
- * is the distance from the point to the text item.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
- static double
- TextToPoint(canvas, itemPtr, pointPtr)
- Tk_Canvas canvas; /* Canvas containing itemPtr. */
- Tk_Item *itemPtr; /* Item to check against point. */
- double *pointPtr; /* Pointer to x and y coordinates. */
- {
- TextItem *textPtr;
- Tk_State state = itemPtr->state;
- double value;
- if (state == TK_STATE_NULL) {
- state = ((TkCanvas *)canvas)->canvas_state;
- }
- textPtr = (TextItem *) itemPtr;
- value = (double) Tk_DistanceToTextLayout(textPtr->textLayout,
- (int) pointPtr[0] - textPtr->leftEdge,
- (int) pointPtr[1] - textPtr->header.y1);
- if ((state == TK_STATE_HIDDEN) || (textPtr->color == NULL) ||
- (textPtr->text == NULL) || (*textPtr->text == 0)) {
- value = 1.0e36;
- }
- return value;
- }
- /*
- *--------------------------------------------------------------
- *
- * 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.
- *
- *--------------------------------------------------------------
- */
- static int
- TextToArea(canvas, itemPtr, rectPtr)
- Tk_Canvas canvas; /* 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;
- Tk_State state = itemPtr->state;
- if (state == TK_STATE_NULL) {
- state = ((TkCanvas *)canvas)->canvas_state;
- }
- textPtr = (TextItem *) itemPtr;
- return Tk_IntersectTextLayout(textPtr->textLayout,
- (int) (rectPtr[0] + 0.5) - textPtr->leftEdge,
- (int) (rectPtr[1] + 0.5) - textPtr->header.y1,
- (int) (rectPtr[2] - rectPtr[0] + 0.5),
- (int) (rectPtr[3] - rectPtr[1] + 0.5));
- }
- /*
- *--------------------------------------------------------------
- *
- * 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(canvas, itemPtr, originX, originY, scaleX, scaleY)
- Tk_Canvas canvas; /* 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. */
- {
- TextItem *textPtr = (TextItem *) itemPtr;
- textPtr->x = originX + scaleX*(textPtr->x - originX);
- textPtr->y = originY + scaleY*(textPtr->y - originY);
- ComputeTextBbox(canvas, 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(canvas, itemPtr, deltaX, deltaY)
- Tk_Canvas canvas; /* Canvas containing item. */
- Tk_Item *itemPtr; /* Item that is being moved. */
- double deltaX, deltaY; /* Amount by which item is to be moved. */
- {
- TextItem *textPtr = (TextItem *) itemPtr;
- textPtr->x += deltaX;
- textPtr->y += deltaY;
- ComputeTextBbox(canvas, 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
- * the interp's result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
- static int
- GetTextIndex(interp, canvas, itemPtr, obj, indexPtr)
- Tcl_Interp *interp; /* Used for error reporting. */
- Tk_Canvas canvas; /* Canvas containing item. */
- Tk_Item *itemPtr; /* Item for which the index is being
- * specified. */
- Tcl_Obj *obj; /* Specification of a particular character
- * in itemPtr's text. */
- int *indexPtr; /* Where to store converted character
- * index. */
- {
- TextItem *textPtr = (TextItem *) itemPtr;
- int c, length;
- TkCanvas *canvasPtr = (TkCanvas *) canvas;
- Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr;
- char *string = Tcl_GetStringFromObj(obj, &length);
- c = string[0];
- if ((c == 'e') && (strncmp(string, "end", (unsigned) length) == 0)) {
- *indexPtr = textPtr->numChars;
- } else if ((c=='i') && (strncmp(string, "insert", (unsigned) length)==0)) {
- *indexPtr = textPtr->insertPos;
- } else if ((c=='s') && (strncmp(string, "sel.first", (unsigned) length)==0)
- && (length >= 5)) {
- if (textInfoPtr->selItemPtr != itemPtr) {
- Tcl_SetResult(interp, "selection isn't in item", TCL_STATIC);
- return TCL_ERROR;
- }
- *indexPtr = textInfoPtr->selectFirst;
- } else if ((c=='s') && (strncmp(string, "sel.last", (unsigned) length)==0)
- && (length >= 5)) {
- if (textInfoPtr->selItemPtr != itemPtr) {
- Tcl_SetResult(interp, "selection isn't in item", TCL_STATIC);
- return TCL_ERROR;
- }
- *indexPtr = textInfoPtr->selectLast;
- } else if (c == '@') {
- int x, y;
- double tmp;
- char *end, *p;
- p = string+1;
- tmp = strtod(p, &end);
- if ((end == p) || (*end != ',')) {
- goto badIndex;
- }
- x = (int) ((tmp < 0) ? tmp - 0.5 : tmp + 0.5);
- p = end+1;
- tmp = strtod(p, &end);
- if ((end == p) || (*end != 0)) {
- goto badIndex;
- }
- y = (int) ((tmp < 0) ? tmp - 0.5 : tmp + 0.5);
- *indexPtr = Tk_PointToChar(textPtr->textLayout,
- x + canvasPtr->scrollX1 - textPtr->leftEdge,
- y + canvasPtr->scrollY1 - textPtr->header.y1);
- } else if (Tcl_GetIntFromObj((Tcl_Interp *)NULL, obj, indexPtr) == TCL_OK) {
- if (*indexPtr < 0){
- *indexPtr = 0;
- } else if (*indexPtr > textPtr->numChars) {
- *indexPtr = textPtr->numChars;
- }
- } else {
- /*
- * Some of the paths here leave messages in the interp's result,
- * so we have to clear it out before storing our own message.
- */
- badIndex:
- Tcl_SetResult(interp, (char *) NULL, TCL_STATIC);
- Tcl_AppendResult(interp, "bad index "", string, """,
- (char *) NULL);
- return TCL_ERROR;
- }
- 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(canvas, itemPtr, index)
- Tk_Canvas canvas; /* Record describing canvas widget. */
- Tk_Item *itemPtr; /* Text item in which cursor position is to
- * be set. */
- int index; /* Character index of character just before
- * which cursor is to be positioned. */
- {
- 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(canvas, itemPtr, offset, buffer, maxBytes)
- Tk_Canvas canvas; /* Canvas containing selection. */
- Tk_Item *itemPtr; /* Text item containing selection. */
- int offset; /* Byte 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 byteCount;
- char *text;
- CONST char *selStart, *selEnd;
- Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr;
- if ((textInfoPtr->selectFirst < 0) ||
- (textInfoPtr->selectFirst > textInfoPtr->selectLast)) {
- return 0;
- }
- text = textPtr->text;
- selStart = Tcl_UtfAtIndex(text, textInfoPtr->selectFirst);
- selEnd = Tcl_UtfAtIndex(selStart,
- textInfoPtr->selectLast + 1 - textInfoPtr->selectFirst);
- byteCount = selEnd - selStart - offset;
- if (byteCount > maxBytes) {
- byteCount = maxBytes;
- }
- if (byteCount <= 0) {
- return 0;
- }
- memcpy(buffer, selStart + offset, (size_t) byteCount);
- buffer[byteCount] = ' ';
- return byteCount;
- }
- /*
- *--------------------------------------------------------------
- *
- * 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 the interp's 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(interp, canvas, itemPtr, prepass)
- Tcl_Interp *interp; /* Leave Postscript or error message here. */
- Tk_Canvas canvas; /* Information about overall canvas. */
- Tk_Item *itemPtr; /* Item for which Postscript is wanted. */
- int prepass; /* 1 means this is a prepass to collect
- * font information; 0 means final Postscript
- * is being created. */
- {
- TextItem *textPtr = (TextItem *) itemPtr;
- int x, y;
- Tk_FontMetrics fm;
- char *justify;
- char buffer[500];
- XColor *color;
- Pixmap stipple;
- Tk_State state = itemPtr->state;
- if(state == TK_STATE_NULL) {
- state = ((TkCanvas *)canvas)->canvas_state;
- }
- color = textPtr->color;
- stipple = textPtr->stipple;
- if (state == TK_STATE_HIDDEN || textPtr->color == NULL ||
- textPtr->text == NULL || *textPtr->text == 0) {
- return TCL_OK;
- } else if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
- if (textPtr->activeColor!=NULL) {
- color = textPtr->activeColor;
- }
- if (textPtr->activeStipple!=None) {
- stipple = textPtr->activeStipple;
- }
- } else if (state==TK_STATE_DISABLED) {
- if (textPtr->disabledColor!=NULL) {
- color = textPtr->disabledColor;
- }
- if (textPtr->disabledStipple!=None) {
- stipple = textPtr->disabledStipple;
- }
- }
- if (Tk_CanvasPsFont(interp, canvas, textPtr->tkfont) != TCL_OK) {
- return TCL_ERROR;
- }
- if (prepass != 0) {
- return TCL_OK;
- }
- if (Tk_CanvasPsColor(interp, canvas, color) != TCL_OK) {
- return TCL_ERROR;
- }
- if (stipple != None) {
- Tcl_AppendResult(interp, "/StippleText {n ",
- (char *) NULL);
- Tk_CanvasPsStipple(interp, canvas, stipple);
- Tcl_AppendResult(interp, "} bind defn", (char *) NULL);
- }
- sprintf(buffer, "%.15g %.15g [n", textPtr->x,
- Tk_CanvasPsY(canvas, textPtr->y));
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- Tk_TextLayoutToPostscript(interp, textPtr->textLayout);
- x = 0; y = 0; justify = NULL; /* lint. */
- switch (textPtr->anchor) {
- case TK_ANCHOR_NW: x = 0; y = 0; break;
- case TK_ANCHOR_N: x = 1; y = 0; break;
- case TK_ANCHOR_NE: x = 2; y = 0; break;
- case TK_ANCHOR_E: x = 2; y = 1; break;
- case TK_ANCHOR_SE: x = 2; y = 2; break;
- case TK_ANCHOR_S: x = 1; y = 2; break;
- case TK_ANCHOR_SW: x = 0; y = 2; break;
- case TK_ANCHOR_W: x = 0; y = 1; break;
- case TK_ANCHOR_CENTER: x = 1; y = 1; break;
- }
- switch (textPtr->justify) {
- case TK_JUSTIFY_LEFT: justify = "0"; break;
- case TK_JUSTIFY_CENTER: justify = "0.5";break;
- case TK_JUSTIFY_RIGHT: justify = "1"; break;
- }
- Tk_GetFontMetrics(textPtr->tkfont, &fm);
- sprintf(buffer, "] %d %g %g %s %s DrawTextn",
- fm.linespace, x / -2.0, y / 2.0, justify,
- ((stipple == None) ? "false" : "true"));
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- return TCL_OK;
- }