diff options
Diffstat (limited to 'generic/tkCanvText.c')
| -rw-r--r-- | generic/tkCanvText.c | 671 |
1 files changed, 329 insertions, 342 deletions
diff --git a/generic/tkCanvText.c b/generic/tkCanvText.c index 8cd3a4e..05ff604 100644 --- a/generic/tkCanvText.c +++ b/generic/tkCanvText.c @@ -1,4 +1,4 @@ -/* +/* * tkCanvText.c -- * * This file implements text items for canvas widgets. @@ -6,10 +6,10 @@ * Copyright (c) 1991-1994 The Regents of the University of California. * Copyright (c) 1994-1997 Sun Microsystems, Inc. * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tkCanvText.c,v 1.18 2005/08/10 22:02:22 dkf Exp $ + * RCS: @(#) $Id: tkCanvText.c,v 1.19 2005/11/04 15:23:05 dkf Exp $ */ #include <stdio.h> @@ -24,17 +24,17 @@ typedef struct TextItem { Tk_Item header; /* Generic stuff that's the same for all - * types. MUST BE FIRST IN STRUCTURE. */ + * types. MUST BE FIRST IN STRUCTURE. */ Tk_CanvasTextInfo *textInfoPtr; /* Pointer to a structure containing * information about the selection and - * insertion cursor. The structure is owned - * by (and shared with) the generic canvas + * insertion cursor. The structure is owned by + * (and shared with) the generic canvas * code. */ /* * Fields that are set by widget commands other than "configure". */ - + double x, y; /* Positioning point for text. */ int insertPos; /* Character index of character just before * which the insertion cursor is displayed. */ @@ -54,8 +54,8 @@ typedef struct TextItem { Pixmap activeStipple; /* Stipple bitmap for text, or None. */ Pixmap disabledStipple; /* Stipple bitmap for text, or None. */ char *text; /* Text for item (malloc-ed). */ - int width; /* Width of lines for word-wrap, pixels. - * Zero means no word-wrap. */ + int width; /* Width of lines for word-wrap, pixels. Zero + * means no word-wrap. */ /* * Fields whose values are derived from the current values of the @@ -65,17 +65,17 @@ typedef struct TextItem { int numChars; /* Length of text in characters. */ int numBytes; /* Length of text in bytes. */ Tk_TextLayout textLayout; /* Cached text layout information. */ - int leftEdge; /* Pixel location of the left edge of the - * text item; where the left border of the - * text layout is drawn. */ - int rightEdge; /* Pixel just to right of right edge of - * area of text item. Used for selecting up - * to end of line. */ + int leftEdge; /* Pixel location of the left edge of the text + * item; where the left border of the text + * layout is drawn. */ + int rightEdge; /* Pixel just to right of right edge of area + * of text item. Used for selecting up to end + * of line. */ GC gc; /* Graphics context for drawing text. */ GC selTextGC; /* Graphics context for selected text. */ GC cursorOffGC; /* If not None, this gives a graphics context * to use to draw the insertion cursor when - * it's off. Used if the selection and + * it's off. Used if the selection and * insertion cursor colors are the same. */ } TextItem; @@ -97,89 +97,84 @@ static Tk_CustomOption offsetOption = { }; static Tk_ConfigSpec configSpecs[] = { - {TK_CONFIG_COLOR, "-activefill", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(TextItem, activeColor), TK_CONFIG_NULL_OK}, - {TK_CONFIG_BITMAP, "-activestipple", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(TextItem, activeStipple), TK_CONFIG_NULL_OK}, - {TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL, - "center", Tk_Offset(TextItem, anchor), - TK_CONFIG_DONT_SET_DEFAULT}, - {TK_CONFIG_COLOR, "-disabledfill", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(TextItem, disabledColor), TK_CONFIG_NULL_OK}, - {TK_CONFIG_BITMAP, "-disabledstipple", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(TextItem, disabledStipple), TK_CONFIG_NULL_OK}, - {TK_CONFIG_COLOR, "-fill", (char *) NULL, (char *) NULL, + {TK_CONFIG_COLOR, "-activefill", NULL, NULL, + NULL, Tk_Offset(TextItem, activeColor), TK_CONFIG_NULL_OK}, + {TK_CONFIG_BITMAP, "-activestipple", NULL, NULL, + NULL, Tk_Offset(TextItem, activeStipple), TK_CONFIG_NULL_OK}, + {TK_CONFIG_ANCHOR, "-anchor", NULL, NULL, + "center", Tk_Offset(TextItem, anchor), TK_CONFIG_DONT_SET_DEFAULT}, + {TK_CONFIG_COLOR, "-disabledfill", NULL, NULL, + NULL, Tk_Offset(TextItem, disabledColor), TK_CONFIG_NULL_OK}, + {TK_CONFIG_BITMAP, "-disabledstipple", NULL, NULL, + NULL, Tk_Offset(TextItem, disabledStipple), TK_CONFIG_NULL_OK}, + {TK_CONFIG_COLOR, "-fill", NULL, NULL, "black", Tk_Offset(TextItem, color), TK_CONFIG_NULL_OK}, - {TK_CONFIG_FONT, "-font", (char *) NULL, (char *) NULL, + {TK_CONFIG_FONT, "-font", NULL, NULL, DEF_CANVTEXT_FONT, Tk_Offset(TextItem, tkfont), 0}, - {TK_CONFIG_JUSTIFY, "-justify", (char *) NULL, (char *) NULL, - "left", Tk_Offset(TextItem, justify), - TK_CONFIG_DONT_SET_DEFAULT}, - {TK_CONFIG_CUSTOM, "-offset", (char *) NULL, (char *) NULL, + {TK_CONFIG_JUSTIFY, "-justify", NULL, NULL, + "left", Tk_Offset(TextItem, justify), TK_CONFIG_DONT_SET_DEFAULT}, + {TK_CONFIG_CUSTOM, "-offset", NULL, NULL, "0,0", Tk_Offset(TextItem, tsoffset), TK_CONFIG_DONT_SET_DEFAULT, &offsetOption}, - {TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, - &stateOption}, - {TK_CONFIG_BITMAP, "-stipple", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(TextItem, stipple), TK_CONFIG_NULL_OK}, - {TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL, - (char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, - {TK_CONFIG_STRING, "-text", (char *) NULL, (char *) NULL, + {TK_CONFIG_CUSTOM, "-state", NULL, NULL, + NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, &stateOption}, + {TK_CONFIG_BITMAP, "-stipple", NULL, NULL, + NULL, Tk_Offset(TextItem, stipple), TK_CONFIG_NULL_OK}, + {TK_CONFIG_CUSTOM, "-tags", NULL, NULL, + NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, + {TK_CONFIG_STRING, "-text", NULL, NULL, "", Tk_Offset(TextItem, text), 0}, - {TK_CONFIG_PIXELS, "-width", (char *) NULL, (char *) NULL, + {TK_CONFIG_PIXELS, "-width", NULL, NULL, "0", Tk_Offset(TextItem, width), TK_CONFIG_DONT_SET_DEFAULT}, - {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL, - (char *) NULL, 0, 0} + {TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0} }; /* - * Prototypes for procedures defined in this file: + * Prototypes for functions defined in this file: */ -static void ComputeTextBbox _ANSI_ARGS_((Tk_Canvas canvas, - TextItem *textPtr)); -static int ConfigureText _ANSI_ARGS_((Tcl_Interp *interp, +static void ComputeTextBbox(Tk_Canvas canvas, TextItem *textPtr); +static int ConfigureText(Tcl_Interp *interp, Tk_Canvas canvas, Tk_Item *itemPtr, int argc, - Tcl_Obj *CONST objv[], int flags)); -static int CreateText _ANSI_ARGS_((Tcl_Interp *interp, + Tcl_Obj *CONST objv[], int flags); +static int CreateText(Tcl_Interp *interp, Tk_Canvas canvas, struct Tk_Item *itemPtr, - int argc, Tcl_Obj *CONST objv[])); -static void DeleteText _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, Display *display)); -static void DisplayCanvText _ANSI_ARGS_((Tk_Canvas canvas, + int argc, Tcl_Obj *CONST objv[]); +static void DeleteText(Tk_Canvas canvas, + Tk_Item *itemPtr, Display *display); +static void DisplayCanvText(Tk_Canvas canvas, Tk_Item *itemPtr, Display *display, Drawable dst, - int x, int y, int width, int height)); -static int GetSelText _ANSI_ARGS_((Tk_Canvas canvas, + int x, int y, int width, int height); +static int GetSelText(Tk_Canvas canvas, Tk_Item *itemPtr, int offset, char *buffer, - int maxBytes)); -static int GetTextIndex _ANSI_ARGS_((Tcl_Interp *interp, + int maxBytes); +static int GetTextIndex(Tcl_Interp *interp, Tk_Canvas canvas, Tk_Item *itemPtr, - Tcl_Obj *obj, int *indexPtr)); -static void ScaleText _ANSI_ARGS_((Tk_Canvas canvas, + Tcl_Obj *obj, int *indexPtr); +static void ScaleText(Tk_Canvas canvas, Tk_Item *itemPtr, double originX, double originY, - double scaleX, double scaleY)); -static void SetTextCursor _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, int index)); -static int TextCoords _ANSI_ARGS_((Tcl_Interp *interp, + double scaleX, double scaleY); +static void SetTextCursor(Tk_Canvas canvas, + Tk_Item *itemPtr, int index); +static int TextCoords(Tcl_Interp *interp, Tk_Canvas canvas, Tk_Item *itemPtr, - int argc, Tcl_Obj *CONST objv[])); -static void TextDeleteChars _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, int first, int last)); -static void TextInsert _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, int beforeThis, char *string)); -static int TextToArea _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, double *rectPtr)); -static double TextToPoint _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, double *pointPtr)); -static int TextToPostscript _ANSI_ARGS_((Tcl_Interp *interp, - Tk_Canvas canvas, Tk_Item *itemPtr, int prepass)); -static void TranslateText _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, double deltaX, double deltaY)); + int argc, Tcl_Obj *CONST objv[]); +static void TextDeleteChars(Tk_Canvas canvas, + Tk_Item *itemPtr, int first, int last); +static void TextInsert(Tk_Canvas canvas, + Tk_Item *itemPtr, int beforeThis, char *string); +static int TextToArea(Tk_Canvas canvas, + Tk_Item *itemPtr, double *rectPtr); +static double TextToPoint(Tk_Canvas canvas, + Tk_Item *itemPtr, double *pointPtr); +static int TextToPostscript(Tcl_Interp *interp, + Tk_Canvas canvas, Tk_Item *itemPtr, int prepass); +static void TranslateText(Tk_Canvas canvas, + Tk_Item *itemPtr, double deltaX, double deltaY); /* - * The structures below defines the rectangle and oval item types - * by means of procedures that can be invoked by generic item code. + * The structures below defines the rectangle and oval item types by means of + * functions that can be invoked by generic item code. */ Tk_ItemType tkTextType = { @@ -202,7 +197,7 @@ Tk_ItemType tkTextType = { GetSelText, /* selectionProc */ TextInsert, /* insertProc */ TextDeleteChars, /* dTextProc */ - (Tk_ItemType *) NULL, /* nextPtr */ + NULL, /* nextPtr */ }; /* @@ -210,14 +205,12 @@ Tk_ItemType tkTextType = { * * CreateText -- * - * This procedure is invoked to create a new text item - * in a canvas. + * This function is invoked to create a new text item in a canvas. * * Results: - * A standard Tcl return value. If an error occurred in - * creating the item then an error message is left in - * the interp's result; in this case itemPtr is left uninitialized - * so it can be safely freed by the caller. + * A standard Tcl return value. If an error occurred in creating the item + * then an error message is left in the interp's result; in this case + * itemPtr is left uninitialized so it can be safely freed by the caller. * * Side effects: * A new text item is created. @@ -226,13 +219,13 @@ Tk_ItemType tkTextType = { */ static int -CreateText(interp, canvas, itemPtr, objc, objv) - Tcl_Interp *interp; /* Interpreter for error reporting. */ - Tk_Canvas canvas; /* Canvas to hold new item. */ - Tk_Item *itemPtr; /* Record to hold new item; header has been +CreateText( + Tcl_Interp *interp, /* Interpreter for error reporting. */ + Tk_Canvas canvas, /* Canvas to hold new item. */ + Tk_Item *itemPtr, /* Record to hold new item; header has been * initialized by caller. */ - int objc; /* Number of arguments in objv. */ - Tcl_Obj *CONST objv[]; /* Arguments describing rectangle. */ + int objc, /* Number of arguments in objv. */ + Tcl_Obj *CONST objv[]) /* Arguments describing rectangle. */ { TextItem *textPtr = (TextItem *) itemPtr; int i; @@ -243,7 +236,7 @@ CreateText(interp, canvas, itemPtr, objc, objv) /* * Carry out initialization that is needed in order to clean up after - * errors during the the remainder of this procedure. + * errors during the the remainder of this function. */ textPtr->textInfoPtr = Tk_CanvasGetTextInfo(canvas); @@ -275,8 +268,8 @@ CreateText(interp, canvas, itemPtr, objc, objv) textPtr->cursorOffGC = None; /* - * Process the arguments to fill in the item record. - * Only 1 (list) or 2 (x y) coords are allowed. + * Process the arguments to fill in the item record. Only 1 (list) or 2 (x + * y) coords are allowed. */ if (objc == 1) { @@ -295,7 +288,7 @@ CreateText(interp, canvas, itemPtr, objc, objv) return TCL_OK; } - error: + error: DeleteText(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas))); return TCL_ERROR; } @@ -305,9 +298,8 @@ CreateText(interp, canvas, itemPtr, objc, objv) * * TextCoords -- * - * This procedure is invoked to process the "coords" widget - * command on text items. See the user documentation for - * details on what it does. + * 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. @@ -319,18 +311,19 @@ CreateText(interp, canvas, itemPtr, objc, objv) */ static int -TextCoords(interp, canvas, itemPtr, objc, objv) - Tcl_Interp *interp; /* Used for error reporting. */ - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item whose coordinates are to be read or +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, ... */ + 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); @@ -357,7 +350,7 @@ TextCoords(interp, canvas, itemPtr, objc, objv) 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; @@ -370,28 +363,28 @@ TextCoords(interp, canvas, itemPtr, objc, objv) * * ConfigureText -- * - * This procedure is invoked to configure various aspects - * of a text item, such as its border and background colors. + * 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. + * 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. + * Configuration information, such as colors and stipple patterns, may be + * set for itemPtr. * *-------------------------------------------------------------- */ static int -ConfigureText(interp, canvas, itemPtr, objc, objv, flags) - Tcl_Interp *interp; /* Interpreter for error reporting. */ - Tk_Canvas canvas; /* Canvas containing itemPtr. */ - Tk_Item *itemPtr; /* Rectangle item to reconfigure. */ - int objc; /* Number of elements in objv. */ - Tcl_Obj *CONST objv[]; /* Arguments describing things to configure. */ - int flags; /* Flags to pass to Tk_ConfigureWidget. */ +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; @@ -411,8 +404,8 @@ ConfigureText(interp, canvas, itemPtr, objc, objv, flags) } /* - * A few of the options require additional processing, such as - * graphics contexts. + * A few of the options require additional processing, such as graphics + * contexts. */ state = itemPtr->state; @@ -497,14 +490,14 @@ ConfigureText(interp, canvas, itemPtr, objc, objv, flags) /* - * If the text was changed, move the selection and insertion indices - * to keep them inside the item. + * 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 { @@ -530,8 +523,8 @@ ConfigureText(interp, canvas, itemPtr, objc, objv, flags) * * DeleteText -- * - * This procedure is called to clean up the data structure - * associated with a text item. + * This function is called to clean up the data structure associated with + * a text item. * * Results: * None. @@ -543,10 +536,10 @@ ConfigureText(interp, canvas, itemPtr, objc, objv, flags) */ static void -DeleteText(canvas, itemPtr, display) - Tk_Canvas canvas; /* Info about overall canvas widget. */ - Tk_Item *itemPtr; /* Item that is being deleted. */ - Display *display; /* Display containing window for canvas. */ +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; @@ -590,26 +583,25 @@ DeleteText(canvas, itemPtr, display) * * ComputeTextBbox -- * - * This procedure is invoked to compute the bounding box of - * all the pixels that may be drawn as part of a text item. - * In addition, it recomputes all of the geometry information - * used to display a text item or check for mouse hits. + * 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. + * The fields x1, y1, x2, and y2 are updated in the header for itemPtr, + * and the linePtr structure is regenerated for itemPtr. * *-------------------------------------------------------------- */ static void -ComputeTextBbox(canvas, textPtr) - Tk_Canvas canvas; /* Canvas that contains item. */ - TextItem *textPtr; /* Item whose bbox is to be recomputed. */ +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; @@ -629,57 +621,56 @@ ComputeTextBbox(canvas, textPtr) } /* - * Use overall geometry information to compute the top-left corner - * of the bounding box for the text item. + * 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; + 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_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_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; + 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). + * 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; @@ -698,26 +689,26 @@ ComputeTextBbox(canvas, textPtr) * * DisplayCanvText -- * - * This procedure is invoked to draw a text item in a given - * drawable. + * 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. + * ItemPtr is drawn in drawable using the transformation information in + * canvas. * *-------------------------------------------------------------- */ static void -DisplayCanvText(canvas, itemPtr, display, drawable, x, y, width, height) - Tk_Canvas canvas; /* Canvas that contains item. */ - Tk_Item *itemPtr; /* Item to be displayed. */ - Display *display; /* Display on which to draw item. */ - Drawable drawable; /* Pixmap or window in which to draw item. */ - int x, y, width, height; /* Describes region of canvas that must be +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; @@ -749,8 +740,8 @@ DisplayCanvText(canvas, itemPtr, display, drawable, x, y, width, height) } /* - * 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 + * 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. */ @@ -792,7 +783,7 @@ DisplayCanvText(canvas, itemPtr, display, drawable, x, y, width, height) for (y = yFirst ; y <= yLast; y += height) { if (y == yLast) { width = xLast + wLast - x; - } else { + } else { width = textPtr->rightEdge - textPtr->leftEdge - x; } Tk_CanvasDrawableCoords(canvas, @@ -811,11 +802,11 @@ DisplayCanvText(canvas, itemPtr, display, drawable, x, y, width, height) /* * 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. + * 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)) { @@ -836,11 +827,10 @@ DisplayCanvText(canvas, itemPtr, display, drawable, x, y, width, 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. + * 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, @@ -851,16 +841,14 @@ DisplayCanvText(canvas, itemPtr, display, drawable, x, y, width, 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. + * 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, @@ -895,20 +883,19 @@ DisplayCanvText(canvas, itemPtr, display, drawable, x, y, width, height) * None. * * Side effects: - * The text in the given item is modified. The cursor and - * selection positions are also modified to reflect the - * insertion. + * The text in the given item is modified. The cursor and selection + * positions are also modified to reflect the insertion. * *-------------------------------------------------------------- */ static void -TextInsert(canvas, itemPtr, index, string) - Tk_Canvas canvas; /* Canvas containing text item. */ - Tk_Item *itemPtr; /* Text item to be modified. */ - int index; /* Character index before which string is - * to be inserted. */ - char *string; /* New characters to be inserted. */ +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; @@ -944,7 +931,7 @@ TextInsert(canvas, itemPtr, index, string) /* * Inserting characters invalidates indices such as those for the - * selection and cursor. Update the indices appropriately. + * selection and cursor. Update the indices appropriately. */ if (textInfoPtr->selItemPtr == itemPtr) { @@ -976,21 +963,20 @@ TextInsert(canvas, itemPtr, index, string) * None. * * Side effects: - * Characters between "first" and "last", inclusive, get - * deleted from itemPtr, and things like the selection - * position get updated. + * Characters between "first" and "last", inclusive, get deleted from + * itemPtr, and things like the selection position get updated. * *-------------------------------------------------------------- */ static void -TextDeleteChars(canvas, itemPtr, first, last) - Tk_Canvas canvas; /* Canvas containing itemPtr. */ - Tk_Item *itemPtr; /* Item in which to delete characters. */ - int first; /* Character index of first character to +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). */ + int last) /* Character index of last character to delete + * (inclusive). */ { TextItem *textPtr = (TextItem *) itemPtr; int byteIndex, byteCount, charsRemoved; @@ -1012,7 +998,7 @@ TextDeleteChars(canvas, itemPtr, first, last) byteIndex = Tcl_UtfAtIndex(text, first) - text; byteCount = Tcl_UtfAtIndex(text + byteIndex, charsRemoved) - (text + byteIndex); - + new = (char *) ckalloc((unsigned) (textPtr->numBytes + 1 - byteCount)); memcpy(new, text, (size_t) byteIndex); strcpy(new + byteIndex, text + byteIndex + byteCount); @@ -1023,8 +1009,8 @@ TextDeleteChars(canvas, itemPtr, first, last) textPtr->numBytes -= byteCount; /* - * Update indexes for the selection and cursor to reflect the - * renumbering of the remaining characters. + * Update indexes for the selection and cursor to reflect the renumbering + * of the remaining characters. */ if (textInfoPtr->selItemPtr == itemPtr) { @@ -1066,14 +1052,14 @@ TextDeleteChars(canvas, itemPtr, first, last) * * TextToPoint -- * - * Computes the distance from a given point to a given - * text item, in canvas units. + * 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. + * 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. @@ -1082,10 +1068,10 @@ TextDeleteChars(canvas, itemPtr, first, last) */ static double -TextToPoint(canvas, itemPtr, pointPtr) - Tk_Canvas canvas; /* Canvas containing itemPtr. */ - Tk_Item *itemPtr; /* Item to check against point. */ - double *pointPtr; /* Pointer to x and y coordinates. */ +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; @@ -1111,14 +1097,13 @@ TextToPoint(canvas, itemPtr, pointPtr) * * TextToArea -- * - * This procedure is called to determine whether an item - * lies entirely inside, entirely outside, or overlapping - * a given rectangle. + * 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. + * -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. @@ -1127,11 +1112,11 @@ TextToPoint(canvas, itemPtr, pointPtr) */ static int -TextToArea(canvas, itemPtr, rectPtr) - Tk_Canvas canvas; /* Canvas containing itemPtr. */ - Tk_Item *itemPtr; /* Item to check against rectangle. */ - double *rectPtr; /* Pointer to array of four coordinates - * (x1, y1, x2, y2) describing rectangular +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; @@ -1154,26 +1139,27 @@ TextToArea(canvas, itemPtr, rectPtr) * * ScaleText -- * - * This procedure is invoked to rescale a text item. + * 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. + * Scales the position of the text, but not the size of the font for the + * text. * *-------------------------------------------------------------- */ /* ARGSUSED */ static void -ScaleText(canvas, itemPtr, originX, originY, scaleX, scaleY) - Tk_Canvas canvas; /* Canvas containing rectangle. */ - Tk_Item *itemPtr; /* Rectangle to be scaled. */ - double originX, originY; /* Origin about which to scale rect. */ - double scaleX; /* Amount to scale in X direction. */ - double scaleY; /* Amount to scale in Y direction. */ +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; @@ -1188,25 +1174,24 @@ ScaleText(canvas, itemPtr, originX, originY, scaleX, scaleY) * * TranslateText -- * - * This procedure is called to move a text item by a - * given amount. + * 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. + * The position of the text item is offset by (xDelta, yDelta), and the + * bounding box is updated in the generic part of the item structure. * *-------------------------------------------------------------- */ static void -TranslateText(canvas, itemPtr, deltaX, deltaY) - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item that is being moved. */ - double deltaX, deltaY; /* Amount by which item is to be moved. */ +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; @@ -1220,14 +1205,13 @@ TranslateText(canvas, itemPtr, deltaX, deltaY) * * GetTextIndex -- * - * Parse an index into a text item and return either its value - * or an error. + * 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. + * 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. @@ -1236,14 +1220,14 @@ TranslateText(canvas, itemPtr, deltaX, deltaY) */ static int -GetTextIndex(interp, canvas, itemPtr, obj, indexPtr) - Tcl_Interp *interp; /* Used for error reporting. */ - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item for which the index is being +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 + Tcl_Obj *obj, /* Specification of a particular character in + * itemPtr's text. */ + int *indexPtr) /* Where to store converted character * index. */ { TextItem *textPtr = (TextItem *) itemPtr; @@ -1294,7 +1278,7 @@ GetTextIndex(interp, canvas, itemPtr, obj, indexPtr) *indexPtr = Tk_PointToChar(textPtr->textLayout, x + canvasPtr->scrollX1 - textPtr->leftEdge, y + canvasPtr->scrollY1 - textPtr->header.y1); - } else if (Tcl_GetIntFromObj((Tcl_Interp *)NULL, obj, indexPtr) == TCL_OK) { + } else if (Tcl_GetIntFromObj(NULL, obj, indexPtr) == TCL_OK) { if (*indexPtr < 0){ *indexPtr = 0; } else if (*indexPtr > textPtr->numChars) { @@ -1302,14 +1286,13 @@ GetTextIndex(interp, canvas, itemPtr, obj, indexPtr) } } 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. + * Some of the paths here leave messages in the interp's result, so we + * have to clear it out before storing our own message. */ - badIndex: - Tcl_SetResult(interp, (char *) NULL, TCL_STATIC); - Tcl_AppendResult(interp, "bad index \"", string, "\"", - (char *) NULL); + badIndex: + Tcl_SetResult(interp, NULL, TCL_STATIC); + Tcl_AppendResult(interp, "bad index \"", string, "\"", NULL); return TCL_ERROR; } return TCL_OK; @@ -1333,11 +1316,11 @@ GetTextIndex(interp, canvas, itemPtr, obj, indexPtr) /* ARGSUSED */ static void -SetTextCursor(canvas, itemPtr, index) - Tk_Canvas canvas; /* Record describing canvas widget. */ - Tk_Item *itemPtr; /* Text item in which cursor position is to - * be set. */ - int index; /* Character index of character just before +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; @@ -1356,15 +1339,14 @@ SetTextCursor(canvas, itemPtr, index) * * GetSelText -- * - * This procedure is invoked to return the selected portion - * of a text item. It is only called when this item has - * the selection. + * 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. + * 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. @@ -1373,18 +1355,18 @@ SetTextCursor(canvas, itemPtr, index) */ static int -GetSelText(canvas, itemPtr, offset, buffer, maxBytes) - Tk_Canvas canvas; /* Canvas containing selection. */ - Tk_Item *itemPtr; /* Text item containing selection. */ - int offset; /* Byte offset within selection of first +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 + 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; + int byteCount; char *text; CONST char *selStart, *selEnd; Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr; @@ -1414,15 +1396,13 @@ GetSelText(canvas, itemPtr, offset, buffer, maxBytes) * * TextToPostscript -- * - * This procedure is called to generate Postscript for - * text items. + * 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. + * 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. @@ -1431,13 +1411,13 @@ GetSelText(canvas, itemPtr, offset, buffer, maxBytes) */ static int -TextToPostscript(interp, canvas, itemPtr, prepass) - Tcl_Interp *interp; /* Leave Postscript or error message here. */ - Tk_Canvas canvas; /* Information about overall canvas. */ - Tk_Item *itemPtr; /* Item for which Postscript is wanted. */ - int prepass; /* 1 means this is a prepass to collect - * font information; 0 means final Postscript - * is being created. */ +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; @@ -1448,7 +1428,7 @@ TextToPostscript(interp, canvas, itemPtr, prepass) Pixmap stipple; Tk_State state = itemPtr->state; - if(state == TK_STATE_NULL) { + if (state == TK_STATE_NULL) { state = ((TkCanvas *)canvas)->canvas_state; } color = textPtr->color; @@ -1482,41 +1462,48 @@ TextToPostscript(interp, canvas, itemPtr, prepass) return TCL_ERROR; } if (stipple != None) { - Tcl_AppendResult(interp, "/StippleText {\n ", - (char *) NULL); + Tcl_AppendResult(interp, "/StippleText {\n ", NULL); Tk_CanvasPsStipple(interp, canvas, stipple); - Tcl_AppendResult(interp, "} bind def\n", (char *) NULL); + Tcl_AppendResult(interp, "} bind def\n", NULL); } sprintf(buffer, "%.15g %.15g [\n", textPtr->x, Tk_CanvasPsY(canvas, textPtr->y)); - Tcl_AppendResult(interp, buffer, (char *) NULL); + 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; + 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; + case TK_JUSTIFY_LEFT: justify = "0"; break; + case TK_JUSTIFY_CENTER: justify = "0.5"; break; + case TK_JUSTIFY_RIGHT: justify = "1"; break; } Tk_GetFontMetrics(textPtr->tkfont, &fm); sprintf(buffer, "] %d %g %g %s %s DrawText\n", fm.linespace, x / -2.0, y / 2.0, justify, ((stipple == None) ? "false" : "true")); - Tcl_AppendResult(interp, buffer, (char *) NULL); + Tcl_AppendResult(interp, buffer, NULL); return TCL_OK; } + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |