Minor whitespace corrections

1 files changed, 1517 insertions, 1516 deletions

diff --git a/generic/tkCanvText.c b/generic/tkCanvText.c
index 9a8782e..8da2fe1 100644
--- a/generic/tkCanvText.c
+++ b/generic/tkCanvText.c
@@ -1,1516 +1,1517 @@
-/*
- * 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 1.21 2006/01/12 13:38:22 dkf 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. */
-    int underline;		/* Index of character to put underline beneath
-				 * or -1 for no underlining. */
-
-    /*
-     * 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", NULL, NULL,
-	NULL, Tk_Offset(TextItem, activeColor), TK_CONFIG_NULL_OK},
-    {TK_CONFIG_BITMAP, "-activestipple", NULL, NULL,
-	NULL, Tk_Offset(TextItem, activeStipple), TK_CONFIG_NULL_OK},
-    {TK_CONFIG_ANCHOR, "-anchor", NULL, NULL,
-	"center", Tk_Offset(TextItem, anchor), TK_CONFIG_DONT_SET_DEFAULT},
-    {TK_CONFIG_COLOR, "-disabledfill", NULL, NULL,
-	NULL, Tk_Offset(TextItem, disabledColor), TK_CONFIG_NULL_OK},
-    {TK_CONFIG_BITMAP, "-disabledstipple", NULL, NULL,
-	NULL, Tk_Offset(TextItem, disabledStipple), TK_CONFIG_NULL_OK},
-    {TK_CONFIG_COLOR, "-fill", NULL, NULL,
-	"black", Tk_Offset(TextItem, color), TK_CONFIG_NULL_OK},
-    {TK_CONFIG_FONT, "-font", NULL, NULL,
-	DEF_CANVTEXT_FONT, Tk_Offset(TextItem, tkfont), 0},
-    {TK_CONFIG_JUSTIFY, "-justify", NULL, NULL,
-	"left", Tk_Offset(TextItem, justify), TK_CONFIG_DONT_SET_DEFAULT},
-    {TK_CONFIG_CUSTOM, "-offset", NULL, NULL,
-	"0,0", Tk_Offset(TextItem, tsoffset),
-	TK_CONFIG_DONT_SET_DEFAULT, &offsetOption},
-    {TK_CONFIG_CUSTOM, "-state", NULL, NULL,
-	NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, &stateOption},
-    {TK_CONFIG_BITMAP, "-stipple", NULL, NULL,
-	NULL, Tk_Offset(TextItem, stipple), TK_CONFIG_NULL_OK},
-    {TK_CONFIG_CUSTOM, "-tags", NULL, NULL,
-	NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
-    {TK_CONFIG_STRING, "-text", NULL, NULL,
-	"", Tk_Offset(TextItem, text), 0},
-    {TK_CONFIG_INT, "-underline", NULL, NULL,
-	"-1", Tk_Offset(TextItem, underline), 0},
-    {TK_CONFIG_PIXELS, "-width", NULL, NULL,
-	"0", Tk_Offset(TextItem, width), TK_CONFIG_DONT_SET_DEFAULT},
-    {TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0}
-};
-
-/*
- * Prototypes for functions defined in this file:
- */
-
-static void		ComputeTextBbox(Tk_Canvas canvas, TextItem *textPtr);
-static int		ConfigureText(Tcl_Interp *interp,
-			    Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
-			    Tcl_Obj *CONST objv[], int flags);
-static int		CreateText(Tcl_Interp *interp,
-			    Tk_Canvas canvas, struct Tk_Item *itemPtr,
-			    int argc, Tcl_Obj *CONST objv[]);
-static void		DeleteText(Tk_Canvas canvas,
-			    Tk_Item *itemPtr, Display *display);
-static void		DisplayCanvText(Tk_Canvas canvas,
-			    Tk_Item *itemPtr, Display *display, Drawable dst,
-			    int x, int y, int width, int height);
-static int		GetSelText(Tk_Canvas canvas,
-			    Tk_Item *itemPtr, int offset, char *buffer,
-			    int maxBytes);
-static int		GetTextIndex(Tcl_Interp *interp,
-			    Tk_Canvas canvas, Tk_Item *itemPtr,
-			    Tcl_Obj *obj, int *indexPtr);
-static void		ScaleText(Tk_Canvas canvas,
-			    Tk_Item *itemPtr, double originX, double originY,
-			    double scaleX, double scaleY);
-static void		SetTextCursor(Tk_Canvas canvas,
-			    Tk_Item *itemPtr, int index);
-static int		TextCoords(Tcl_Interp *interp,
-			    Tk_Canvas canvas, Tk_Item *itemPtr,
-			    int argc, Tcl_Obj *CONST objv[]);
-static void		TextDeleteChars(Tk_Canvas canvas,
-			    Tk_Item *itemPtr, int first, int last);
-static void		TextInsert(Tk_Canvas canvas,
-			    Tk_Item *itemPtr, int beforeThis, char *string);
-static int		TextToArea(Tk_Canvas canvas,
-			    Tk_Item *itemPtr, double *rectPtr);
-static double		TextToPoint(Tk_Canvas canvas,
-			    Tk_Item *itemPtr, double *pointPtr);
-static int		TextToPostscript(Tcl_Interp *interp,
-			    Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);
-static void		TranslateText(Tk_Canvas canvas,
-			    Tk_Item *itemPtr, double deltaX, double deltaY);
-
-/*
- * The structures below defines the rectangle and oval item types by means of
- * functions 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 */
-    NULL,			/* nextPtr */
-};
-
-/*
- *--------------------------------------------------------------
- *
- * CreateText --
- *
- *	This function 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(
-    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) {
-	Tcl_Panic("canvas did not pass any coords\n");
-    }
-
-    /*
-     * Carry out initialization that is needed in order to clean up after
-     * errors during the the remainder of this function.
-     */
-
-    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->underline	= -1;
-
-    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 function 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(
-    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 function 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(
-    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;
-	}
-	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 function 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(
-    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 function 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(
-    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 function 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(
-    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, int y, int width, int 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);
-    }
-    Tk_UnderlineTextLayout(display, drawable, textPtr->gc, textPtr->textLayout,
-	    drawableX, drawableY, textPtr->underline);
-
-    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(
-    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 *newStr, *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;
-    }
-
-    newStr = (char *) ckalloc((unsigned) textPtr->numBytes + byteCount + 1);
-    memcpy(newStr, text, (size_t) byteIndex);
-    strcpy(newStr + byteIndex, string);
-    strcpy(newStr + byteIndex + byteCount, text + byteIndex);
-
-    ckfree(text);
-    textPtr->text = newStr;
-    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(
-    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 *newStr, *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);
-
-    newStr = (char *) ckalloc((unsigned) (textPtr->numBytes + 1 - byteCount));
-    memcpy(newStr, text, (size_t) byteIndex);
-    strcpy(newStr + byteIndex, text + byteIndex + byteCount);
-
-    ckfree(text);
-    textPtr->text = newStr;
-    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(
-    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 function 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(
-    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 function 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(
-    Tk_Canvas canvas,		/* Canvas containing rectangle. */
-    Tk_Item *itemPtr,		/* Rectangle to be scaled. */
-    double originX, double 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 function 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(
-    Tk_Canvas canvas,		/* Canvas containing item. */
-    Tk_Item *itemPtr,		/* Item that is being moved. */
-    double deltaX, double 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(
-    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 length;
-    int c;
-    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') && (length >= 5)
-	    && (strncmp(string, "sel.first", (unsigned) length) == 0)) {
-	if (textInfoPtr->selItemPtr != itemPtr) {
-	    Tcl_SetResult(interp, "selection isn't in item", TCL_STATIC);
-	    return TCL_ERROR;
-	}
-	*indexPtr = textInfoPtr->selectFirst;
-    } else if ((c == 's') && (length >= 5)
-	    && (strncmp(string, "sel.last", (unsigned) length) == 0)) {
-	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(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, NULL, TCL_STATIC);
-	Tcl_AppendResult(interp, "bad index \"", string, "\"", 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(
-    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 function 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(
-    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] = '\0';
-    return byteCount;
-}
-
-/*
- *--------------------------------------------------------------
- *
- * TextToPostscript --
- *
- *	This function 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(
-    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    ", NULL);
-	Tk_CanvasPsStipple(interp, canvas, stipple);
-	Tcl_AppendResult(interp, "} bind def\n", NULL);
-    }
-
-    sprintf(buffer, "%.15g %.15g [\n", textPtr->x,
-	    Tk_CanvasPsY(canvas, textPtr->y));
-    Tcl_AppendResult(interp, buffer, 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 DrawText\n",
-	    fm.linespace, x / -2.0, y / 2.0, justify,
-	    ((stipple == None) ? "false" : "true"));
-    Tcl_AppendResult(interp, buffer, NULL);
-
-    return TCL_OK;
-}
-
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 4
- * fill-column: 78
- * End:
- */
+/*

+ * 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 1.22 2007/02/12 21:41:47 dkf 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. */

+    int underline;		/* Index of character to put underline beneath

+				 * or -1 for no underlining. */

+

+    /*

+     * 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", NULL, NULL,

+	NULL, Tk_Offset(TextItem, activeColor), TK_CONFIG_NULL_OK},

+    {TK_CONFIG_BITMAP, "-activestipple", NULL, NULL,

+	NULL, Tk_Offset(TextItem, activeStipple), TK_CONFIG_NULL_OK},

+    {TK_CONFIG_ANCHOR, "-anchor", NULL, NULL,

+	"center", Tk_Offset(TextItem, anchor), TK_CONFIG_DONT_SET_DEFAULT},

+    {TK_CONFIG_COLOR, "-disabledfill", NULL, NULL,

+	NULL, Tk_Offset(TextItem, disabledColor), TK_CONFIG_NULL_OK},

+    {TK_CONFIG_BITMAP, "-disabledstipple", NULL, NULL,

+	NULL, Tk_Offset(TextItem, disabledStipple), TK_CONFIG_NULL_OK},

+    {TK_CONFIG_COLOR, "-fill", NULL, NULL,

+	"black", Tk_Offset(TextItem, color), TK_CONFIG_NULL_OK},

+    {TK_CONFIG_FONT, "-font", NULL, NULL,

+	DEF_CANVTEXT_FONT, Tk_Offset(TextItem, tkfont), 0},

+    {TK_CONFIG_JUSTIFY, "-justify", NULL, NULL,

+	"left", Tk_Offset(TextItem, justify), TK_CONFIG_DONT_SET_DEFAULT},

+    {TK_CONFIG_CUSTOM, "-offset", NULL, NULL,

+	"0,0", Tk_Offset(TextItem, tsoffset),

+	TK_CONFIG_DONT_SET_DEFAULT, &offsetOption},

+    {TK_CONFIG_CUSTOM, "-state", NULL, NULL,

+	NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, &stateOption},

+    {TK_CONFIG_BITMAP, "-stipple", NULL, NULL,

+	NULL, Tk_Offset(TextItem, stipple), TK_CONFIG_NULL_OK},

+    {TK_CONFIG_CUSTOM, "-tags", NULL, NULL,

+	NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},

+    {TK_CONFIG_STRING, "-text", NULL, NULL,

+	"", Tk_Offset(TextItem, text), 0},

+    {TK_CONFIG_INT, "-underline", NULL, NULL,

+	"-1", Tk_Offset(TextItem, underline), 0},

+    {TK_CONFIG_PIXELS, "-width", NULL, NULL,

+	"0", Tk_Offset(TextItem, width), TK_CONFIG_DONT_SET_DEFAULT},

+    {TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0}

+};

+

+/*

+ * Prototypes for functions defined in this file:

+ */

+

+static void		ComputeTextBbox(Tk_Canvas canvas, TextItem *textPtr);

+static int		ConfigureText(Tcl_Interp *interp,

+			    Tk_Canvas canvas, Tk_Item *itemPtr, int argc,

+			    Tcl_Obj *CONST objv[], int flags);

+static int		CreateText(Tcl_Interp *interp,

+			    Tk_Canvas canvas, struct Tk_Item *itemPtr,

+			    int argc, Tcl_Obj *CONST objv[]);

+static void		DeleteText(Tk_Canvas canvas,

+			    Tk_Item *itemPtr, Display *display);

+static void		DisplayCanvText(Tk_Canvas canvas,

+			    Tk_Item *itemPtr, Display *display, Drawable dst,

+			    int x, int y, int width, int height);

+static int		GetSelText(Tk_Canvas canvas,

+			    Tk_Item *itemPtr, int offset, char *buffer,

+			    int maxBytes);

+static int		GetTextIndex(Tcl_Interp *interp,

+			    Tk_Canvas canvas, Tk_Item *itemPtr,

+			    Tcl_Obj *obj, int *indexPtr);

+static void		ScaleText(Tk_Canvas canvas,

+			    Tk_Item *itemPtr, double originX, double originY,

+			    double scaleX, double scaleY);

+static void		SetTextCursor(Tk_Canvas canvas,

+			    Tk_Item *itemPtr, int index);

+static int		TextCoords(Tcl_Interp *interp,

+			    Tk_Canvas canvas, Tk_Item *itemPtr,

+			    int argc, Tcl_Obj *CONST objv[]);

+static void		TextDeleteChars(Tk_Canvas canvas,

+			    Tk_Item *itemPtr, int first, int last);

+static void		TextInsert(Tk_Canvas canvas,

+			    Tk_Item *itemPtr, int beforeThis, char *string);

+static int		TextToArea(Tk_Canvas canvas,

+			    Tk_Item *itemPtr, double *rectPtr);

+static double		TextToPoint(Tk_Canvas canvas,

+			    Tk_Item *itemPtr, double *pointPtr);

+static int		TextToPostscript(Tcl_Interp *interp,

+			    Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);

+static void		TranslateText(Tk_Canvas canvas,

+			    Tk_Item *itemPtr, double deltaX, double deltaY);

+

+/*

+ * The structures below defines the rectangle and oval item types by means of

+ * functions 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 */

+    NULL,			/* nextPtr */

+};

+

+/*

+ *--------------------------------------------------------------

+ *

+ * CreateText --

+ *

+ *	This function 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(

+    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) {

+	Tcl_Panic("canvas did not pass any coords\n");

+    }

+

+    /*

+     * Carry out initialization that is needed in order to clean up after

+     * errors during the the remainder of this function.

+     */

+

+    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->underline	= -1;

+

+    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 function 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(

+    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 function 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(

+    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;

+	}

+	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 function 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(

+    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 function 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(

+    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 function 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(

+    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, int y, int width, int 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);

+    }

+    Tk_UnderlineTextLayout(display, drawable, textPtr->gc, textPtr->textLayout,

+	    drawableX, drawableY, textPtr->underline);

+

+    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(

+    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 *newStr, *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;

+    }

+

+    newStr = (char *) ckalloc((unsigned) textPtr->numBytes + byteCount + 1);

+    memcpy(newStr, text, (size_t) byteIndex);

+    strcpy(newStr + byteIndex, string);

+    strcpy(newStr + byteIndex + byteCount, text + byteIndex);

+

+    ckfree(text);

+    textPtr->text = newStr;

+    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(

+    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 *newStr, *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);

+

+    newStr = (char *) ckalloc((unsigned) (textPtr->numBytes + 1 - byteCount));

+    memcpy(newStr, text, (size_t) byteIndex);

+    strcpy(newStr + byteIndex, text + byteIndex + byteCount);

+

+    ckfree(text);

+    textPtr->text = newStr;

+    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(

+    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 function 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(

+    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 function 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(

+    Tk_Canvas canvas,		/* Canvas containing rectangle. */

+    Tk_Item *itemPtr,		/* Rectangle to be scaled. */

+    double originX, double 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 function 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(

+    Tk_Canvas canvas,		/* Canvas containing item. */

+    Tk_Item *itemPtr,		/* Item that is being moved. */

+    double deltaX, double 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(

+    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 length;

+    int c;

+    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') && (length >= 5)

+	    && (strncmp(string, "sel.first", (unsigned) length) == 0)) {

+	if (textInfoPtr->selItemPtr != itemPtr) {

+	    Tcl_SetResult(interp, "selection isn't in item", TCL_STATIC);

+	    return TCL_ERROR;

+	}

+	*indexPtr = textInfoPtr->selectFirst;

+    } else if ((c == 's') && (length >= 5)

+	    && (strncmp(string, "sel.last", (unsigned) length) == 0)) {

+	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(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, NULL, TCL_STATIC);

+	Tcl_AppendResult(interp, "bad index \"", string, "\"", 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(

+    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 function 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(

+    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] = '\0';

+    return byteCount;

+}

+

+/*

+ *--------------------------------------------------------------

+ *

+ * TextToPostscript --

+ *

+ *	This function 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(

+    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    ", NULL);

+	Tk_CanvasPsStipple(interp, canvas, stipple);

+	Tcl_AppendResult(interp, "} bind def\n", NULL);

+    }

+

+    sprintf(buffer, "%.15g %.15g [\n", textPtr->x,

+	    Tk_CanvasPsY(canvas, textPtr->y));

+    Tcl_AppendResult(interp, buffer, 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 DrawText\n",

+	    fm.linespace, x / -2.0, y / 2.0, justify,

+	    ((stipple == None) ? "false" : "true"));

+    Tcl_AppendResult(interp, buffer, NULL);

+

+    return TCL_OK;

+}

+

+/*

+ * Local Variables:

+ * mode: c

+ * c-basic-offset: 4

+ * fill-column: 78

+ * End:

+ */