1522 lines
45 KiB
C
1522 lines
45 KiB
C
/*
|
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* tkCanvText.c --
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*
|
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* This file implements text items for canvas widgets.
|
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*
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* Copyright (c) 1991-1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution of
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* this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*/
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|
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#include <stdio.h>
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#include "tkInt.h"
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#include "tkCanvas.h"
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#include "default.h"
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|
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/*
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* The structure below defines the record for each text item.
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*/
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typedef struct TextItem {
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Tk_Item header; /* Generic stuff that's the same for all
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* types. MUST BE FIRST IN STRUCTURE. */
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Tk_CanvasTextInfo *textInfoPtr;
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/* Pointer to a structure containing
|
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* information about the selection and
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* insertion cursor. The structure is owned by
|
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* (and shared with) the generic canvas
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* code. */
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/*
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* Fields that are set by widget commands other than "configure".
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*/
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double x, y; /* Positioning point for text. */
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int insertPos; /* Character index of character just before
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* which the insertion cursor is displayed. */
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/*
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* Configuration settings that are updated by Tk_ConfigureWidget.
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*/
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||
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Tk_Anchor anchor; /* Where to anchor text relative to (x,y). */
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Tk_TSOffset tsoffset;
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XColor *color; /* Color for text. */
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XColor *activeColor; /* Color for text. */
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XColor *disabledColor; /* Color for text. */
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||
Tk_Font tkfont; /* Font for drawing text. */
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Tk_Justify justify; /* Justification mode for text. */
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Pixmap stipple; /* Stipple bitmap for text, or None. */
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Pixmap activeStipple; /* Stipple bitmap for text, or None. */
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Pixmap disabledStipple; /* Stipple bitmap for text, or None. */
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char *text; /* Text for item (malloc-ed). */
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int width; /* Width of lines for word-wrap, pixels. Zero
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* means no word-wrap. */
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int underline; /* Index of character to put underline beneath
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* or -1 for no underlining. */
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/*
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* Fields whose values are derived from the current values of the
|
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* configuration settings above.
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*/
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int numChars; /* Length of text in characters. */
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int numBytes; /* Length of text in bytes. */
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Tk_TextLayout textLayout; /* Cached text layout information. */
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int leftEdge; /* Pixel location of the left edge of the text
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* item; where the left border of the text
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* layout is drawn. */
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int rightEdge; /* Pixel just to right of right edge of area
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* of text item. Used for selecting up to end
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* of line. */
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GC gc; /* Graphics context for drawing text. */
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GC selTextGC; /* Graphics context for selected text. */
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GC cursorOffGC; /* If not None, this gives a graphics context
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* to use to draw the insertion cursor when
|
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* it's off. Used if the selection and
|
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* insertion cursor colors are the same. */
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} TextItem;
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/*
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* Information used for parsing configuration specs:
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||
*/
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static Tk_CustomOption stateOption = {
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(Tk_OptionParseProc *) TkStateParseProc,
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TkStatePrintProc, (ClientData) 2
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};
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static Tk_CustomOption tagsOption = {
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(Tk_OptionParseProc *) Tk_CanvasTagsParseProc,
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Tk_CanvasTagsPrintProc, (ClientData) NULL
|
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};
|
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static Tk_CustomOption offsetOption = {
|
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(Tk_OptionParseProc *) TkOffsetParseProc,
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TkOffsetPrintProc, (ClientData) (TK_OFFSET_RELATIVE)
|
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};
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|
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static Tk_ConfigSpec configSpecs[] = {
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{TK_CONFIG_COLOR, "-activefill", NULL, NULL,
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NULL, Tk_Offset(TextItem, activeColor), TK_CONFIG_NULL_OK},
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{TK_CONFIG_BITMAP, "-activestipple", NULL, NULL,
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NULL, Tk_Offset(TextItem, activeStipple), TK_CONFIG_NULL_OK},
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{TK_CONFIG_ANCHOR, "-anchor", NULL, NULL,
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"center", Tk_Offset(TextItem, anchor), TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_COLOR, "-disabledfill", NULL, NULL,
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NULL, Tk_Offset(TextItem, disabledColor), TK_CONFIG_NULL_OK},
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{TK_CONFIG_BITMAP, "-disabledstipple", NULL, NULL,
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NULL, Tk_Offset(TextItem, disabledStipple), TK_CONFIG_NULL_OK},
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{TK_CONFIG_COLOR, "-fill", NULL, NULL,
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"black", Tk_Offset(TextItem, color), TK_CONFIG_NULL_OK},
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{TK_CONFIG_FONT, "-font", NULL, NULL,
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DEF_CANVTEXT_FONT, Tk_Offset(TextItem, tkfont), 0},
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{TK_CONFIG_JUSTIFY, "-justify", NULL, NULL,
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"left", Tk_Offset(TextItem, justify), TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_CUSTOM, "-offset", NULL, NULL,
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"0,0", Tk_Offset(TextItem, tsoffset),
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TK_CONFIG_DONT_SET_DEFAULT, &offsetOption},
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{TK_CONFIG_CUSTOM, "-state", NULL, NULL,
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NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, &stateOption},
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{TK_CONFIG_BITMAP, "-stipple", NULL, NULL,
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NULL, Tk_Offset(TextItem, stipple), TK_CONFIG_NULL_OK},
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{TK_CONFIG_CUSTOM, "-tags", NULL, NULL,
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NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
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{TK_CONFIG_STRING, "-text", NULL, NULL,
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"", Tk_Offset(TextItem, text), 0},
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{TK_CONFIG_INT, "-underline", NULL, NULL,
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"-1", Tk_Offset(TextItem, underline), 0},
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{TK_CONFIG_PIXELS, "-width", NULL, NULL,
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"0", Tk_Offset(TextItem, width), TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0}
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};
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/*
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* Prototypes for functions defined in this file:
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*/
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static void ComputeTextBbox(Tk_Canvas canvas, TextItem *textPtr);
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static int ConfigureText(Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
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Tcl_Obj *CONST objv[], int flags);
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static int CreateText(Tcl_Interp *interp,
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Tk_Canvas canvas, struct Tk_Item *itemPtr,
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int argc, Tcl_Obj *CONST objv[]);
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static void DeleteText(Tk_Canvas canvas,
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Tk_Item *itemPtr, Display *display);
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static void DisplayCanvText(Tk_Canvas canvas,
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Tk_Item *itemPtr, Display *display, Drawable dst,
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int x, int y, int width, int height);
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static int GetSelText(Tk_Canvas canvas,
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Tk_Item *itemPtr, int offset, char *buffer,
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int maxBytes);
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static int GetTextIndex(Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr,
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Tcl_Obj *obj, int *indexPtr);
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static void ScaleText(Tk_Canvas canvas,
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Tk_Item *itemPtr, double originX, double originY,
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double scaleX, double scaleY);
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static void SetTextCursor(Tk_Canvas canvas,
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Tk_Item *itemPtr, int index);
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static int TextCoords(Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr,
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int argc, Tcl_Obj *CONST objv[]);
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static void TextDeleteChars(Tk_Canvas canvas,
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Tk_Item *itemPtr, int first, int last);
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static void TextInsert(Tk_Canvas canvas,
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Tk_Item *itemPtr, int beforeThis, char *string);
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static int TextToArea(Tk_Canvas canvas,
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Tk_Item *itemPtr, double *rectPtr);
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static double TextToPoint(Tk_Canvas canvas,
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Tk_Item *itemPtr, double *pointPtr);
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static int TextToPostscript(Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);
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static void TranslateText(Tk_Canvas canvas,
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Tk_Item *itemPtr, double deltaX, double deltaY);
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/*
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* The structures below defines the rectangle and oval item types by means of
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* functions that can be invoked by generic item code.
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*/
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Tk_ItemType tkTextType = {
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"text", /* name */
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sizeof(TextItem), /* itemSize */
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CreateText, /* createProc */
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configSpecs, /* configSpecs */
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ConfigureText, /* configureProc */
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TextCoords, /* coordProc */
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DeleteText, /* deleteProc */
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DisplayCanvText, /* displayProc */
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TK_CONFIG_OBJS, /* flags */
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TextToPoint, /* pointProc */
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TextToArea, /* areaProc */
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TextToPostscript, /* postscriptProc */
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ScaleText, /* scaleProc */
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TranslateText, /* translateProc */
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(Tk_ItemIndexProc *) GetTextIndex,/* indexProc */
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SetTextCursor, /* icursorProc */
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GetSelText, /* selectionProc */
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TextInsert, /* insertProc */
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TextDeleteChars, /* dTextProc */
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NULL, /* nextPtr */
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};
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/*
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*--------------------------------------------------------------
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*
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* CreateText --
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*
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* This function is invoked to create a new text item in a canvas.
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*
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* Results:
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* A standard Tcl return value. If an error occurred in creating the item
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* then an error message is left in the interp's result; in this case
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* itemPtr is left uninitialized so it can be safely freed by the caller.
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*
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* Side effects:
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* A new text item is created.
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*
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*--------------------------------------------------------------
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*/
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static int
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CreateText(
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Tcl_Interp *interp, /* Interpreter for error reporting. */
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Tk_Canvas canvas, /* Canvas to hold new item. */
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Tk_Item *itemPtr, /* Record to hold new item; header has been
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* initialized by caller. */
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int objc, /* Number of arguments in objv. */
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Tcl_Obj *CONST objv[]) /* Arguments describing rectangle. */
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{
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TextItem *textPtr = (TextItem *) itemPtr;
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int i;
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if (objc == 0) {
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Tcl_Panic("canvas did not pass any coords\n");
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}
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/*
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* Carry out initialization that is needed in order to clean up after
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* errors during the the remainder of this function.
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*/
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textPtr->textInfoPtr = Tk_CanvasGetTextInfo(canvas);
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textPtr->insertPos = 0;
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textPtr->anchor = TK_ANCHOR_CENTER;
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textPtr->tsoffset.flags = 0;
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textPtr->tsoffset.xoffset = 0;
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textPtr->tsoffset.yoffset = 0;
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textPtr->color = NULL;
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textPtr->activeColor = NULL;
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textPtr->disabledColor = NULL;
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textPtr->tkfont = NULL;
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textPtr->justify = TK_JUSTIFY_LEFT;
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textPtr->stipple = None;
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textPtr->activeStipple = None;
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textPtr->disabledStipple = None;
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textPtr->text = NULL;
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textPtr->width = 0;
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textPtr->underline = -1;
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textPtr->numChars = 0;
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textPtr->numBytes = 0;
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textPtr->textLayout = NULL;
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textPtr->leftEdge = 0;
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textPtr->rightEdge = 0;
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textPtr->gc = None;
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textPtr->selTextGC = None;
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textPtr->cursorOffGC = None;
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|
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/*
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* Process the arguments to fill in the item record. Only 1 (list) or 2 (x
|
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* y) coords are allowed.
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*/
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if (objc == 1) {
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i = 1;
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} else {
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char *arg = Tcl_GetString(objv[1]);
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|
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i = 2;
|
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if ((arg[0] == '-') && (arg[1] >= 'a') && (arg[1] <= 'z')) {
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i = 1;
|
||
}
|
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}
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if ((TextCoords(interp, canvas, itemPtr, i, objv) != TCL_OK)) {
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||
goto error;
|
||
}
|
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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 --
|
||
*
|
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* 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;
|
||
}
|
||
if (textInfoPtr->selFgColorPtr != NULL) {
|
||
gcValues.foreground = textInfoPtr->selFgColorPtr->pixel;
|
||
}
|
||
newSelGC = Tk_GetGC(tkwin, mask|GCForeground, &gcValues);
|
||
}
|
||
if (textPtr->gc != None) {
|
||
Tk_FreeGC(Tk_Display(tkwin), textPtr->gc);
|
||
}
|
||
textPtr->gc = newGC;
|
||
if (textPtr->selTextGC != None) {
|
||
Tk_FreeGC(Tk_Display(tkwin), textPtr->selTextGC);
|
||
}
|
||
textPtr->selTextGC = newSelGC;
|
||
|
||
selBgColorPtr = Tk_3DBorderColor(textInfoPtr->selBorder);
|
||
if (Tk_3DBorderColor(textInfoPtr->insertBorder)->pixel
|
||
== selBgColorPtr->pixel) {
|
||
if (selBgColorPtr->pixel == BlackPixelOfScreen(Tk_Screen(tkwin))) {
|
||
gcValues.foreground = WhitePixelOfScreen(Tk_Screen(tkwin));
|
||
} else {
|
||
gcValues.foreground = BlackPixelOfScreen(Tk_Screen(tkwin));
|
||
}
|
||
newGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
|
||
} else {
|
||
newGC = None;
|
||
}
|
||
if (textPtr->cursorOffGC != None) {
|
||
Tk_FreeGC(Tk_Display(tkwin), textPtr->cursorOffGC);
|
||
}
|
||
textPtr->cursorOffGC = newGC;
|
||
|
||
|
||
/*
|
||
* If the text was changed, move the selection and insertion indices to
|
||
* keep them inside the item.
|
||
*/
|
||
|
||
textPtr->numBytes = strlen(textPtr->text);
|
||
textPtr->numChars = Tcl_NumUtfChars(textPtr->text, textPtr->numBytes);
|
||
if (textInfoPtr->selItemPtr == itemPtr) {
|
||
|
||
if (textInfoPtr->selectFirst >= textPtr->numChars) {
|
||
textInfoPtr->selItemPtr = NULL;
|
||
} else {
|
||
if (textInfoPtr->selectLast >= textPtr->numChars) {
|
||
textInfoPtr->selectLast = textPtr->numChars - 1;
|
||
}
|
||
if ((textInfoPtr->anchorItemPtr == itemPtr)
|
||
&& (textInfoPtr->selectAnchor >= textPtr->numChars)) {
|
||
textInfoPtr->selectAnchor = textPtr->numChars - 1;
|
||
}
|
||
}
|
||
}
|
||
if (textPtr->insertPos >= textPtr->numChars) {
|
||
textPtr->insertPos = textPtr->numChars;
|
||
}
|
||
|
||
ComputeTextBbox(canvas, textPtr);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* DeleteText --
|
||
*
|
||
* This 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 ", fm.linespace);
|
||
Tcl_AppendResult(interp, buffer, NULL);
|
||
Tcl_PrintDouble(NULL, x / -2.0, buffer);
|
||
Tcl_AppendResult(interp, buffer, NULL);
|
||
Tcl_PrintDouble(NULL, y / 2.0, buffer);
|
||
Tcl_AppendResult(interp, " ", buffer, NULL);
|
||
sprintf(buffer, " %s %s DrawText\n",
|
||
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:
|
||
*/
|