1662 lines
48 KiB
C
1662 lines
48 KiB
C
/*
|
||
* 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 "tkInt.h"
|
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#include "tkCanvas.h"
|
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#include "default.h"
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|
||
/*
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* The structure below defines the record for each text item.
|
||
*/
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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;
|
||
/* Pointer to a structure containing
|
||
* 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. */
|
||
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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||
double angle; /* What angle, in degrees, to draw the text
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* at. */
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||
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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 actualWidth; /* Width of text as computed. Used to make
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* selections of wrapped text display
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* right. */
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double drawOrigin[2]; /* Where we start drawing from. */
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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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double sine; /* Sine of angle field. */
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double cosine; /* Cosine of angle field. */
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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 const Tk_CustomOption stateOption = {
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TkStateParseProc, TkStatePrintProc, INT2PTR(2)
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};
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static const Tk_CustomOption tagsOption = {
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Tk_CanvasTagsParseProc, Tk_CanvasTagsPrintProc, NULL
|
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};
|
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static const Tk_CustomOption offsetOption = {
|
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TkOffsetParseProc, TkOffsetPrintProc, INT2PTR(TK_OFFSET_RELATIVE)
|
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};
|
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|
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static const 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, NULL},
|
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{TK_CONFIG_BITMAP, "-activestipple", NULL, NULL,
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NULL, Tk_Offset(TextItem, activeStipple), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_ANCHOR, "-anchor", NULL, NULL,
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"center", Tk_Offset(TextItem, anchor), TK_CONFIG_DONT_SET_DEFAULT, NULL},
|
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{TK_CONFIG_DOUBLE, "-angle", NULL, NULL,
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"0.0", Tk_Offset(TextItem, angle), TK_CONFIG_DONT_SET_DEFAULT, NULL},
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{TK_CONFIG_COLOR, "-disabledfill", NULL, NULL,
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NULL, Tk_Offset(TextItem, disabledColor), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_BITMAP, "-disabledstipple", NULL, NULL,
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NULL, Tk_Offset(TextItem, disabledStipple), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_COLOR, "-fill", NULL, NULL,
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DEF_CANVITEM_OUTLINE, Tk_Offset(TextItem, color), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_FONT, "-font", NULL, NULL,
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DEF_CANVTEXT_FONT, Tk_Offset(TextItem, tkfont), 0, NULL},
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{TK_CONFIG_JUSTIFY, "-justify", NULL, NULL,
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"left", Tk_Offset(TextItem, justify), TK_CONFIG_DONT_SET_DEFAULT, NULL},
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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, NULL},
|
||
{TK_CONFIG_CUSTOM, "-tags", NULL, NULL,
|
||
NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
|
||
{TK_CONFIG_STRING, "-text", NULL, NULL,
|
||
"", Tk_Offset(TextItem, text), 0, NULL},
|
||
{TK_CONFIG_INT, "-underline", NULL, NULL,
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"-1", Tk_Offset(TextItem, underline), 0, NULL},
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{TK_CONFIG_PIXELS, "-width", NULL, NULL,
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"0", Tk_Offset(TextItem, width), TK_CONFIG_DONT_SET_DEFAULT, NULL},
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{TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0, NULL}
|
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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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||
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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, Tcl_Obj *obj);
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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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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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NULL, 0, NULL, NULL
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};
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#define ROUND(d) ((int) floor((d) + 0.5))
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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");
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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->angle = 0.0;
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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->actualWidth = 0;
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textPtr->drawOrigin[0] = textPtr->drawOrigin[1] = 0.0;
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textPtr->gc = NULL;
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textPtr->selTextGC = NULL;
|
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textPtr->cursorOffGC = NULL;
|
||
textPtr->sine = 0.0;
|
||
textPtr->cosine = 1.0;
|
||
|
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/*
|
||
* 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 {
|
||
const 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);
|
||
return TCL_OK;
|
||
} else if (objc > 2) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"wrong # coordinates: expected 0 or 2, got %d", objc));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "COORDS", "TEXT", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if (objc == 1) {
|
||
if (Tcl_ListObjGetElements(interp, objv[0], &objc,
|
||
(Tcl_Obj ***) &objv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
} else if (objc != 2) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"wrong # coordinates: expected 2, got %d", objc));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "COORDS", "TEXT", NULL);
|
||
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);
|
||
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 = Canvas(canvas)->canvas_state;
|
||
}
|
||
|
||
color = textPtr->color;
|
||
stipple = textPtr->stipple;
|
||
if (Canvas(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 = NULL;
|
||
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 != NULL) {
|
||
Tk_FreeGC(Tk_Display(tkwin), textPtr->gc);
|
||
}
|
||
textPtr->gc = newGC;
|
||
if (textPtr->selTextGC != NULL) {
|
||
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 = NULL;
|
||
}
|
||
if (textPtr->cursorOffGC != NULL) {
|
||
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;
|
||
}
|
||
|
||
/*
|
||
* Restrict so that 0.0 <= angle < 360.0, and then recompute the cached
|
||
* sine and cosine of the angle. Note that fmod() can produce negative
|
||
* results, and we try to avoid negative zero as well.
|
||
*/
|
||
|
||
textPtr->angle = fmod(textPtr->angle, 360.0);
|
||
if (textPtr->angle < 0.0) {
|
||
textPtr->angle += 360.0;
|
||
}
|
||
if (textPtr->angle == 0.0) {
|
||
textPtr->angle = 0.0;
|
||
}
|
||
textPtr->sine = sin(textPtr->angle * PI/180.0);
|
||
textPtr->cosine = cos(textPtr->angle * PI/180.0);
|
||
|
||
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 != NULL) {
|
||
Tk_FreeGC(display, textPtr->gc);
|
||
}
|
||
if (textPtr->selTextGC != NULL) {
|
||
Tk_FreeGC(display, textPtr->selTextGC);
|
||
}
|
||
if (textPtr->cursorOffGC != NULL) {
|
||
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, i;
|
||
Tk_State state = textPtr->header.state;
|
||
double x[4], y[4], dx[4], dy[4], sinA, cosA, tmp;
|
||
|
||
if (state == TK_STATE_NULL) {
|
||
state = Canvas(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 = ROUND(textPtr->x);
|
||
topY = ROUND(textPtr->y);
|
||
for (i=0 ; i<4 ; i++) {
|
||
dx[i] = dy[i] = 0.0;
|
||
}
|
||
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;
|
||
for (i=0 ; i<4 ; i++) {
|
||
dy[i] = -height / 2;
|
||
}
|
||
break;
|
||
|
||
case TK_ANCHOR_SW:
|
||
case TK_ANCHOR_S:
|
||
case TK_ANCHOR_SE:
|
||
topY -= height;
|
||
for (i=0 ; i<4 ; i++) {
|
||
dy[i] = -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;
|
||
for (i=0 ; i<4 ; i++) {
|
||
dx[i] = -width / 2;
|
||
}
|
||
break;
|
||
|
||
case TK_ANCHOR_NE:
|
||
case TK_ANCHOR_E:
|
||
case TK_ANCHOR_SE:
|
||
leftX -= width;
|
||
for (i=0 ; i<4 ; i++) {
|
||
dx[i] = -width;
|
||
}
|
||
break;
|
||
}
|
||
|
||
textPtr->actualWidth = width;
|
||
|
||
sinA = textPtr->sine;
|
||
cosA = textPtr->cosine;
|
||
textPtr->drawOrigin[0] = textPtr->x + dx[0]*cosA + dy[0]*sinA;
|
||
textPtr->drawOrigin[1] = textPtr->y + dy[0]*cosA - dx[0]*sinA;
|
||
|
||
/*
|
||
* 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;
|
||
}
|
||
|
||
/*
|
||
* Apply the rotation before computing the bounding box.
|
||
*/
|
||
|
||
dx[0] -= fudge;
|
||
dx[1] += width + fudge;
|
||
dx[2] += width + fudge;
|
||
dy[2] += height;
|
||
dx[3] -= fudge;
|
||
dy[3] += height;
|
||
for (i=0 ; i<4 ; i++) {
|
||
x[i] = textPtr->x + dx[i] * cosA + dy[i] * sinA;
|
||
y[i] = textPtr->y + dy[i] * cosA - dx[i] * sinA;
|
||
}
|
||
|
||
/*
|
||
* Convert to a rectilinear bounding box.
|
||
*/
|
||
|
||
for (i=1,tmp=x[0] ; i<4 ; i++) {
|
||
if (x[i] < tmp) {
|
||
tmp = x[i];
|
||
}
|
||
}
|
||
textPtr->header.x1 = ROUND(tmp);
|
||
for (i=1,tmp=y[0] ; i<4 ; i++) {
|
||
if (y[i] < tmp) {
|
||
tmp = y[i];
|
||
}
|
||
}
|
||
textPtr->header.y1 = ROUND(tmp);
|
||
for (i=1,tmp=x[0] ; i<4 ; i++) {
|
||
if (x[i] > tmp) {
|
||
tmp = x[i];
|
||
}
|
||
}
|
||
textPtr->header.x2 = ROUND(tmp);
|
||
for (i=1,tmp=y[0] ; i<4 ; i++) {
|
||
if (y[i] > tmp) {
|
||
tmp = y[i];
|
||
}
|
||
}
|
||
textPtr->header.y2 = ROUND(tmp);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* 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 = Canvas(canvas)->canvas_state;
|
||
}
|
||
stipple = textPtr->stipple;
|
||
if (Canvas(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 == NULL) {
|
||
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. */
|
||
Tk_CanvasDrawableCoords(canvas, textPtr->drawOrigin[0],
|
||
textPtr->drawOrigin[1], &drawableX, &drawableY);
|
||
|
||
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) {
|
||
int dx1, dy1, dx2, dy2;
|
||
double s = textPtr->sine, c = textPtr->cosine;
|
||
XPoint points[4];
|
||
|
||
if (y == yLast) {
|
||
width = xLast + wLast - x;
|
||
} else {
|
||
width = textPtr->actualWidth - x;
|
||
}
|
||
dx1 = x - textInfoPtr->selBorderWidth;
|
||
dy1 = y;
|
||
dx2 = width + 2 * textInfoPtr->selBorderWidth;
|
||
dy2 = height;
|
||
points[0].x = (short)(drawableX + dx1*c + dy1*s);
|
||
points[0].y = (short)(drawableY + dy1*c - dx1*s);
|
||
points[1].x = (short)(drawableX + (dx1+dx2)*c + dy1*s);
|
||
points[1].y = (short)(drawableY + dy1*c - (dx1+dx2)*s);
|
||
points[2].x = (short)(drawableX + (dx1+dx2)*c + (dy1+dy2)*s);
|
||
points[2].y = (short)(drawableY + (dy1+dy2)*c - (dx1+dx2)*s);
|
||
points[3].x = (short)(drawableX + dx1*c + (dy1+dy2)*s);
|
||
points[3].y = (short)(drawableY + (dy1+dy2)*c - dx1*s);
|
||
Tk_Fill3DPolygon(Tk_CanvasTkwin(canvas), drawable,
|
||
textInfoPtr->selBorder, points, 4,
|
||
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)) {
|
||
int dx1, dy1, dx2, dy2;
|
||
double s = textPtr->sine, c = textPtr->cosine;
|
||
XPoint points[4];
|
||
|
||
dx1 = x - (textInfoPtr->insertWidth / 2);
|
||
dy1 = y;
|
||
dx2 = textInfoPtr->insertWidth;
|
||
dy2 = height;
|
||
points[0].x = (short)(drawableX + dx1*c + dy1*s);
|
||
points[0].y = (short)(drawableY + dy1*c - dx1*s);
|
||
points[1].x = (short)(drawableX + (dx1+dx2)*c + dy1*s);
|
||
points[1].y = (short)(drawableY + dy1*c - (dx1+dx2)*s);
|
||
points[2].x = (short)(drawableX + (dx1+dx2)*c + (dy1+dy2)*s);
|
||
points[2].y = (short)(drawableY + (dy1+dy2)*c - (dx1+dx2)*s);
|
||
points[3].x = (short)(drawableX + dx1*c + (dy1+dy2)*s);
|
||
points[3].y = (short)(drawableY + (dy1+dy2)*c - dx1*s);
|
||
|
||
Tk_SetCaretPos(Tk_CanvasTkwin(canvas), points[0].x, points[0].y,
|
||
height);
|
||
if (textInfoPtr->cursorOn) {
|
||
Tk_Fill3DPolygon(Tk_CanvasTkwin(canvas), drawable,
|
||
textInfoPtr->insertBorder, points, 4,
|
||
textInfoPtr->insertBorderWidth, TK_RELIEF_RAISED);
|
||
} else if (textPtr->cursorOffGC != NULL) {
|
||
/*
|
||
* 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.
|
||
*/
|
||
|
||
XFillPolygon(display, drawable, textPtr->cursorOffGC,
|
||
points, 4, Convex, CoordModeOrigin);
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* 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.
|
||
*/
|
||
|
||
if ((selFirstChar >= 0) && (textPtr->selTextGC != textPtr->gc)) {
|
||
if (0 < selFirstChar) {
|
||
TkDrawAngledTextLayout(display, drawable, textPtr->gc,
|
||
textPtr->textLayout, drawableX, drawableY, textPtr->angle,
|
||
0, selFirstChar);
|
||
}
|
||
TkDrawAngledTextLayout(display, drawable, textPtr->selTextGC,
|
||
textPtr->textLayout, drawableX, drawableY, textPtr->angle,
|
||
selFirstChar, selLastChar + 1);
|
||
if (selLastChar + 1 < textPtr->numChars) {
|
||
TkDrawAngledTextLayout(display, drawable, textPtr->gc,
|
||
textPtr->textLayout, drawableX, drawableY, textPtr->angle,
|
||
selLastChar + 1, textPtr->numChars);
|
||
}
|
||
} else {
|
||
TkDrawAngledTextLayout(display, drawable, textPtr->gc,
|
||
textPtr->textLayout, drawableX, drawableY, textPtr->angle,
|
||
0, textPtr->numChars);
|
||
}
|
||
TkUnderlineAngledTextLayout(display, drawable, textPtr->gc,
|
||
textPtr->textLayout, drawableX, drawableY, textPtr->angle,
|
||
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. */
|
||
Tcl_Obj *obj) /* New characters to be inserted. */
|
||
{
|
||
TextItem *textPtr = (TextItem *) itemPtr;
|
||
int byteIndex, byteCount, charsAdded;
|
||
char *newStr, *text;
|
||
const char *string;
|
||
Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr;
|
||
|
||
string = Tcl_GetStringFromObj(obj, &byteCount);
|
||
|
||
text = textPtr->text;
|
||
|
||
if (index < 0) {
|
||
index = 0;
|
||
}
|
||
if (index > textPtr->numChars) {
|
||
index = textPtr->numChars;
|
||
}
|
||
byteIndex = TkUtfAtIndex(text, index) - text;
|
||
byteCount = strlen(string);
|
||
if (byteCount == 0) {
|
||
return;
|
||
}
|
||
|
||
newStr = (char *)ckalloc(textPtr->numBytes + byteCount + 1);
|
||
memcpy(newStr, text, 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 = TkUtfAtIndex(text, first) - text;
|
||
byteCount = TkUtfAtIndex(text + byteIndex, charsRemoved)
|
||
- (text + byteIndex);
|
||
|
||
newStr = (char *)ckalloc(textPtr->numBytes + 1 - byteCount);
|
||
memcpy(newStr, text, 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, px, py;
|
||
|
||
if (state == TK_STATE_NULL) {
|
||
state = Canvas(canvas)->canvas_state;
|
||
}
|
||
textPtr = (TextItem *) itemPtr;
|
||
px = pointPtr[0] - textPtr->drawOrigin[0];
|
||
py = pointPtr[1] - textPtr->drawOrigin[1];
|
||
value = (double) Tk_DistanceToTextLayout(textPtr->textLayout,
|
||
(int) (px*textPtr->cosine - py*textPtr->sine),
|
||
(int) (py*textPtr->cosine + px*textPtr->sine));
|
||
|
||
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 = Canvas(canvas)->canvas_state;
|
||
}
|
||
|
||
textPtr = (TextItem *) itemPtr;
|
||
return TkIntersectAngledTextLayout(textPtr->textLayout,
|
||
(int) ((rectPtr[0] + 0.5) - textPtr->drawOrigin[0]),
|
||
(int) ((rectPtr[1] + 0.5) - textPtr->drawOrigin[1]),
|
||
(int) (rectPtr[2] - rectPtr[0] + 0.5),
|
||
(int) (rectPtr[3] - rectPtr[1] + 0.5),
|
||
textPtr->angle);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* 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.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
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. */
|
||
TCL_UNUSED(Tk_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;
|
||
Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr;
|
||
const char *string = Tcl_GetStringFromObj(obj, &length);
|
||
|
||
c = string[0];
|
||
|
||
if ((c == 'e') && (strncmp(string, "end", length) == 0)) {
|
||
*indexPtr = textPtr->numChars;
|
||
} else if ((c == 'i')
|
||
&& (strncmp(string, "insert", length) == 0)) {
|
||
*indexPtr = textPtr->insertPos;
|
||
} else if ((c == 's') && (length >= 5)
|
||
&& (strncmp(string, "sel.first", length) == 0)) {
|
||
if (textInfoPtr->selItemPtr != itemPtr) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"selection isn't in item", -1));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "UNSELECTED", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
*indexPtr = textInfoPtr->selectFirst;
|
||
} else if ((c == 's') && (length >= 5)
|
||
&& (strncmp(string, "sel.last", length) == 0)) {
|
||
if (textInfoPtr->selItemPtr != itemPtr) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"selection isn't in item", -1));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "UNSELECTED", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
*indexPtr = textInfoPtr->selectLast;
|
||
} else if (c == '@') {
|
||
int x, y;
|
||
double tmp, cs = textPtr->cosine, s = textPtr->sine;
|
||
char *end;
|
||
const char *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);
|
||
x -= (int) textPtr->drawOrigin[0];
|
||
y -= (int) textPtr->drawOrigin[1];
|
||
*indexPtr = Tk_PointToChar(textPtr->textLayout,
|
||
(int) (x*cs - y*s), (int) (y*cs + x*s));
|
||
} 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_SetObjResult(interp, Tcl_ObjPrintf("bad index \"%s\"", string));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "ITEM_INDEX", "TEXT", 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.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
SetTextCursor(
|
||
TCL_UNUSED(Tk_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(
|
||
TCL_UNUSED(Tk_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 = TkUtfAtIndex(text, textInfoPtr->selectFirst);
|
||
selEnd = TkUtfAtIndex(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;
|
||
double x, y;
|
||
Tk_FontMetrics fm;
|
||
const char *justify;
|
||
XColor *color;
|
||
Pixmap stipple;
|
||
Tk_State state = itemPtr->state;
|
||
Tcl_Obj *psObj;
|
||
Tcl_InterpState interpState;
|
||
|
||
if (state == TK_STATE_NULL) {
|
||
state = Canvas(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 (Canvas(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;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Make our working space.
|
||
*/
|
||
|
||
psObj = Tcl_NewObj();
|
||
interpState = Tcl_SaveInterpState(interp, TCL_OK);
|
||
|
||
/*
|
||
* Generate postscript.
|
||
*/
|
||
|
||
Tcl_ResetResult(interp);
|
||
if (Tk_CanvasPsFont(interp, canvas, textPtr->tkfont) != TCL_OK) {
|
||
goto error;
|
||
}
|
||
Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp));
|
||
|
||
if (prepass != 0) {
|
||
goto done;
|
||
}
|
||
|
||
Tcl_ResetResult(interp);
|
||
if (Tk_CanvasPsColor(interp, canvas, color) != TCL_OK) {
|
||
goto error;
|
||
}
|
||
Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp));
|
||
|
||
if (stipple != None) {
|
||
Tcl_ResetResult(interp);
|
||
Tk_CanvasPsStipple(interp, canvas, stipple);
|
||
Tcl_AppendPrintfToObj(psObj, "/StippleText {\n %s} bind def\n",
|
||
Tcl_GetString(Tcl_GetObjResult(interp)));
|
||
}
|
||
|
||
x = 0; y = 0; justify = NULL;
|
||
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);
|
||
|
||
Tcl_AppendPrintfToObj(psObj, "%.15g %.15g %.15g [\n",
|
||
textPtr->angle, textPtr->x, Tk_CanvasPsY(canvas, textPtr->y));
|
||
Tcl_ResetResult(interp);
|
||
Tk_TextLayoutToPostscript(interp, textPtr->textLayout);
|
||
Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp));
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"] %d %g %g %s %s DrawText\n",
|
||
fm.linespace, x / -2.0, y / 2.0, justify,
|
||
((stipple == None) ? "false" : "true"));
|
||
|
||
/*
|
||
* Plug the accumulated postscript back into the result.
|
||
*/
|
||
|
||
done:
|
||
(void) Tcl_RestoreInterpState(interp, interpState);
|
||
Tcl_AppendObjToObj(Tcl_GetObjResult(interp), psObj);
|
||
Tcl_DecrRefCount(psObj);
|
||
return TCL_OK;
|
||
|
||
error:
|
||
Tcl_DiscardInterpState(interpState);
|
||
Tcl_DecrRefCount(psObj);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Local Variables:
|
||
* mode: c
|
||
* c-basic-offset: 4
|
||
* fill-column: 78
|
||
* End:
|
||
*/
|