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- /*
- * tkEntry.c --
- *
- * This module implements entry widgets for the Tk
- * toolkit. An entry displays a string and allows
- * the string to be edited.
- *
- * Copyright 1990 Regents of the University of California.
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: /user6/ouster/wish/RCS/tkEntry.c,v 1.37 92/08/21 16:09:15 ouster Exp $ SPRITE (Berkeley)";
- #endif
-
- #include "default.h"
- #include "tkConfig.h"
- #include "tkInt.h"
-
- /*
- * A data structure of the following type is kept for each entry
- * widget managed by this file:
- */
-
- typedef struct {
- Tk_Window tkwin; /* Window that embodies the entry. NULL
- * means that the window has been destroyed
- * but the data structures haven't yet been
- * cleaned up.*/
- Tcl_Interp *interp; /* Interpreter associated with entry. */
- int numChars; /* Number of non-NULL characters in
- * string (may be 0). */
- char *string; /* Pointer to storage for string;
- * NULL-terminated; malloc-ed. */
- char *textVarName; /* Name of variable (malloc'ed) or NULL.
- * If non-NULL, entry's string tracks the
- * contents of this variable and vice versa. */
- Tk_Uid state; /* Normal or disabled. Entry is read-only
- * when disabled. */
-
- /*
- * Information used when displaying widget:
- */
-
- Tk_3DBorder normalBorder; /* Used for drawing border around whole
- * window, plus used for background. */
- int borderWidth; /* Width of 3-D border around window. */
- int relief; /* 3-D effect: TK_RELIEF_RAISED, etc. */
- XFontStruct *fontPtr; /* Information about text font, or NULL. */
- XColor *fgColorPtr; /* Text color in normal mode. */
- GC textGC; /* For drawing normal text. */
- Tk_3DBorder selBorder; /* Border and background for selected
- * characters. */
- int selBorderWidth; /* Width of border around selection. */
- XColor *selFgColorPtr; /* Foreground color for selected text. */
- GC selTextGC; /* For drawing selected text. */
- Tk_3DBorder cursorBorder; /* Used to draw vertical bar for insertion
- * cursor. */
- int cursorWidth; /* Total width of insert cursor. */
- int cursorBorderWidth; /* Width of 3-D border around insert cursor. */
- int cursorOnTime; /* Number of milliseconds cursor should spend
- * in "on" state for each blink. */
- int cursorOffTime; /* Number of milliseconds cursor should spend
- * in "off" state for each blink. */
- Tk_TimerToken cursorBlinkHandler;
- /* Timer handler used to blink cursor on and
- * off. */
- int avgWidth; /* Width of average character. */
- int prefWidth; /* Desired width of window, measured in
- * average characters. */
- int offset; /* 0 if window is flat, or borderWidth if
- * raised or sunken. */
- int leftIndex; /* Index of left-most character visible in
- * window. */
- int cursorPos; /* Index of character before which next
- * typed character will be inserted. */
-
- /*
- * Information about what's selected, if any.
- */
-
- int selectFirst; /* Index of first selected character (-1 means
- * nothing selected. */
- int selectLast; /* Index of last selected character (-1 means
- * nothing selected. */
- int selectAnchor; /* Fixed end of selection (i.e. "select to"
- * operation will use this as one end of the
- * selection). */
- int exportSelection; /* Non-zero means tie internal entry selection
- * to X selection. */
-
- /*
- * Information for scanning:
- */
-
- int scanMarkX; /* X-position at which scan started (e.g.
- * button was pressed here). */
- int scanMarkIndex; /* Index of character that was at left of
- * window when scan started. */
-
- /*
- * Miscellaneous information:
- */
-
- Cursor cursor; /* Current cursor for window, or None. */
- char *scrollCmd; /* Command prefix for communicating with
- * scrollbar(s). Malloc'ed. NULL means
- * no command to issue. */
- int flags; /* Miscellaneous flags; see below for
- * definitions. */
- } Entry;
-
- /*
- * Assigned bits of "flags" fields of Entry structures, and what those
- * bits mean:
- *
- * REDRAW_PENDING: Non-zero means a DoWhenIdle handler has
- * already been queued to redisplay the entry.
- * BORDER_NEEDED: Non-zero means 3-D border must be redrawn
- * around window during redisplay. Normally
- * only text portion needs to be redrawn.
- * CURSOR_ON: Non-zero means cursor is displayed at
- * present. 0 means it isn't displayed.
- * GOT_FOCUS: Non-zero means this window has the input
- * focus.
- */
-
- #define REDRAW_PENDING 1
- #define BORDER_NEEDED 2
- #define CURSOR_ON 4
- #define GOT_FOCUS 8
-
- /*
- * Information used for argv parsing.
- */
-
- static Tk_ConfigSpec configSpecs[] = {
- {TK_CONFIG_BORDER, "-background", "background", "Background",
- DEF_ENTRY_BG_COLOR, Tk_Offset(Entry, normalBorder),
- TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_BORDER, "-background", "background", "Background",
- DEF_ENTRY_BG_MONO, Tk_Offset(Entry, normalBorder),
- TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
- (char *) NULL, 0, 0},
- {TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
- (char *) NULL, 0, 0},
- {TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
- DEF_ENTRY_BORDER_WIDTH, Tk_Offset(Entry, borderWidth), 0},
- {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
- DEF_ENTRY_CURSOR, Tk_Offset(Entry, cursor), TK_CONFIG_NULL_OK},
- {TK_CONFIG_BORDER, "-cursorbackground", "cursorBackground", "Foreground",
- DEF_ENTRY_CURSOR_BG, Tk_Offset(Entry, cursorBorder), 0},
- {TK_CONFIG_PIXELS, "-cursorborderwidth", "cursorBorderWidth", "BorderWidth",
- DEF_ENTRY_CURSOR_BD_COLOR, Tk_Offset(Entry, cursorBorderWidth),
- TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_PIXELS, "-cursorborderwidth", "cursorBorderWidth", "BorderWidth",
- DEF_ENTRY_CURSOR_BD_MONO, Tk_Offset(Entry, cursorBorderWidth),
- TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_INT, "-cursorofftime", "cursorOffTime", "OffTime",
- DEF_ENTRY_CURSOR_OFF_TIME, Tk_Offset(Entry, cursorOffTime), 0},
- {TK_CONFIG_INT, "-cursorontime", "cursorOnTime", "OnTime",
- DEF_ENTRY_CURSOR_ON_TIME, Tk_Offset(Entry, cursorOnTime), 0},
- {TK_CONFIG_PIXELS, "-cursorwidth", "cursorWidth", "CursorWidth",
- DEF_ENTRY_CURSOR_WIDTH, Tk_Offset(Entry, cursorWidth), 0},
- {TK_CONFIG_BOOLEAN, "-exportselection", "exportSelection",
- "ExportSelection", DEF_ENTRY_EXPORT_SELECTION,
- Tk_Offset(Entry, exportSelection), 0},
- {TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
- (char *) NULL, 0, 0},
- {TK_CONFIG_FONT, "-font", "font", "Font",
- DEF_ENTRY_FONT, Tk_Offset(Entry, fontPtr), 0},
- {TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
- DEF_ENTRY_FG, Tk_Offset(Entry, fgColorPtr), 0},
- {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
- DEF_ENTRY_RELIEF, Tk_Offset(Entry, relief), 0},
- {TK_CONFIG_STRING, "-scrollcommand", "scrollCommand", "ScrollCommand",
- DEF_ENTRY_SCROLL_COMMAND, Tk_Offset(Entry, scrollCmd), 0},
- {TK_CONFIG_BORDER, "-selectbackground", "selectBackground", "Foreground",
- DEF_ENTRY_SELECT_COLOR, Tk_Offset(Entry, selBorder),
- TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_BORDER, "-selectbackground", "selectBackground", "Foreground",
- DEF_ENTRY_SELECT_MONO, Tk_Offset(Entry, selBorder),
- TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_PIXELS, "-selectborderwidth", "selectBorderWidth", "BorderWidth",
- DEF_ENTRY_SELECT_BD_COLOR, Tk_Offset(Entry, selBorderWidth),
- TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_PIXELS, "-selectborderwidth", "selectBorderWidth", "BorderWidth",
- DEF_ENTRY_SELECT_BD_MONO, Tk_Offset(Entry, selBorderWidth),
- TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background",
- DEF_ENTRY_SELECT_FG_COLOR, Tk_Offset(Entry, selFgColorPtr),
- TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background",
- DEF_ENTRY_SELECT_FG_MONO, Tk_Offset(Entry, selFgColorPtr),
- TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_UID, "-state", "state", "State",
- DEF_ENTRY_STATE, Tk_Offset(Entry, state), 0},
- {TK_CONFIG_STRING, "-textvariable", "textVariable", "Variable",
- DEF_ENTRY_TEXT_VARIABLE, Tk_Offset(Entry, textVarName),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_INT, "-width", "width", "Width",
- DEF_ENTRY_WIDTH, Tk_Offset(Entry, prefWidth), 0},
- {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
- (char *) NULL, 0, 0}
- };
-
- /*
- * Flags for GetEntryIndex procedure:
- */
-
- #define ZERO_OK 1
- #define LAST_PLUS_ONE_OK 2
-
- /*
- * Forward declarations for procedures defined later in this file:
- */
-
- static int ConfigureEntry _ANSI_ARGS_((Tcl_Interp *interp,
- Entry *entryPtr, int argc, char **argv,
- int flags));
- static void DeleteChars _ANSI_ARGS_((Entry *entryPtr, int index,
- int count));
- static void DestroyEntry _ANSI_ARGS_((ClientData clientData));
- static void DisplayEntry _ANSI_ARGS_((ClientData clientData));
- static int GetEntryIndex _ANSI_ARGS_((Tcl_Interp *interp,
- Entry *entryPtr, char *string, int *indexPtr));
- static void InsertChars _ANSI_ARGS_((Entry *entryPtr, int index,
- char *string));
- static void EntryBlinkProc _ANSI_ARGS_((ClientData clientData));
- static void EntryEventProc _ANSI_ARGS_((ClientData clientData,
- XEvent *eventPtr));
- static void EntryFocusProc _ANSI_ARGS_ ((ClientData clientData,
- int gotFocus));
- static int EntryFetchSelection _ANSI_ARGS_((ClientData clientData,
- int offset, char *buffer, int maxBytes));
- static void EntryLostSelection _ANSI_ARGS_((
- ClientData clientData));
- static void EventuallyRedraw _ANSI_ARGS_((Entry *entryPtr));
- static void EntryScanTo _ANSI_ARGS_((Entry *entryPtr, int y));
- static void EntrySetValue _ANSI_ARGS_((Entry *entryPtr,
- char *value));
- static void EntrySelectTo _ANSI_ARGS_((
- Entry *entryPtr, int index));
- static char * EntryTextVarProc _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, char *name1, char *name2,
- int flags));
- static void EntryUpdateScrollbar _ANSI_ARGS_((Entry *entryPtr));
- static int EntryWidgetCmd _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, int argc, char **argv));
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_EntryCmd --
- *
- * This procedure is invoked to process the "entry" Tcl
- * command. See the user documentation for details on what
- * it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
- *
- *--------------------------------------------------------------
- */
-
- int
- Tk_EntryCmd(clientData, interp, argc, argv)
- ClientData clientData; /* Main window associated with
- * interpreter. */
- Tcl_Interp *interp; /* Current interpreter. */
- int argc; /* Number of arguments. */
- char **argv; /* Argument strings. */
- {
- Tk_Window tkwin = (Tk_Window) clientData;
- register Entry *entryPtr;
- Tk_Window new;
-
- if (argc < 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " pathName ?options?\"", (char *) NULL);
- return TCL_ERROR;
- }
-
- new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL);
- if (new == NULL) {
- return TCL_ERROR;
- }
-
- /*
- * Initialize the fields of the structure that won't be initialized
- * by ConfigureEntry, or that ConfigureEntry requires to be
- * initialized already (e.g. resource pointers).
- */
-
- entryPtr = (Entry *) ckalloc(sizeof(Entry));
- entryPtr->tkwin = new;
- entryPtr->interp = interp;
- entryPtr->numChars = 0;
- entryPtr->string = (char *) ckalloc(1);
- entryPtr->string[0] = '\0';
- entryPtr->textVarName = NULL;
- entryPtr->state = tkNormalUid;
- entryPtr->normalBorder = NULL;
- entryPtr->fontPtr = NULL;
- entryPtr->fgColorPtr = NULL;
- entryPtr->textGC = None;
- entryPtr->selBorder = NULL;
- entryPtr->selFgColorPtr = NULL;
- entryPtr->selTextGC = NULL;
- entryPtr->cursorBorder = NULL;
- entryPtr->cursorBlinkHandler = (Tk_TimerToken) NULL;
- entryPtr->leftIndex = 0;
- entryPtr->cursorPos = 0;
- entryPtr->selectFirst = -1;
- entryPtr->selectLast = -1;
- entryPtr->selectAnchor = 0;
- entryPtr->exportSelection = 1;
- entryPtr->scanMarkX = 0;
- entryPtr->cursor = None;
- entryPtr->scrollCmd = NULL;
- entryPtr->flags = 0;
-
- Tk_SetClass(entryPtr->tkwin, "Entry");
- Tk_CreateEventHandler(entryPtr->tkwin, ExposureMask|StructureNotifyMask,
- EntryEventProc, (ClientData) entryPtr);
- Tk_CreateSelHandler(entryPtr->tkwin, XA_STRING, EntryFetchSelection,
- (ClientData) entryPtr, XA_STRING);
- Tcl_CreateCommand(interp, Tk_PathName(entryPtr->tkwin), EntryWidgetCmd,
- (ClientData) entryPtr, (void (*)()) NULL);
- if (ConfigureEntry(interp, entryPtr, argc-2, argv+2, 0) != TCL_OK) {
- goto error;
- }
- Tk_CreateFocusHandler(entryPtr->tkwin, EntryFocusProc,
- (ClientData) entryPtr);
-
- interp->result = Tk_PathName(entryPtr->tkwin);
- return TCL_OK;
-
- error:
- Tk_DestroyWindow(entryPtr->tkwin);
- return TCL_ERROR;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * EntryWidgetCmd --
- *
- * This procedure is invoked to process the Tcl command
- * that corresponds to a widget managed by this module.
- * See the user documentation for details on what it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
- *
- *--------------------------------------------------------------
- */
-
- static int
- EntryWidgetCmd(clientData, interp, argc, argv)
- ClientData clientData; /* Information about entry widget. */
- Tcl_Interp *interp; /* Current interpreter. */
- int argc; /* Number of arguments. */
- char **argv; /* Argument strings. */
- {
- register Entry *entryPtr = (Entry *) clientData;
- int result = TCL_OK;
- int length;
- char c;
-
- if (argc < 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " option ?arg arg ...?\"", (char *) NULL);
- return TCL_ERROR;
- }
- Tk_Preserve((ClientData) entryPtr);
- c = argv[1][0];
- length = strlen(argv[1]);
- if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
- && (length >= 2)) {
- if (argc == 2) {
- result = Tk_ConfigureInfo(interp, entryPtr->tkwin, configSpecs,
- (char *) entryPtr, (char *) NULL, 0);
- } else if (argc == 3) {
- result = Tk_ConfigureInfo(interp, entryPtr->tkwin, configSpecs,
- (char *) entryPtr, argv[2], 0);
- } else {
- result = ConfigureEntry(interp, entryPtr, argc-2, argv+2,
- TK_CONFIG_ARGV_ONLY);
- }
- } else if ((c == 'c') && (strncmp(argv[1], "cursor", length) == 0)
- && (length >= 2)) {
- if (argc != 3) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " cursor pos\"",
- (char *) NULL);
- goto error;
- }
- if (GetEntryIndex(interp, entryPtr, argv[2], &entryPtr->cursorPos)
- != TCL_OK) {
- goto error;
- }
- EventuallyRedraw(entryPtr);
- } else if ((c == 'd') && (strncmp(argv[1], "delete", length) == 0)) {
- int first, last;
-
- if ((argc < 3) || (argc > 4)) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " delete firstIndex ?lastIndex?\"",
- (char *) NULL);
- goto error;
- }
- if (GetEntryIndex(interp, entryPtr, argv[2], &first) != TCL_OK) {
- goto error;
- }
- if (argc == 3) {
- last = first;
- } else {
- if (GetEntryIndex(interp, entryPtr, argv[3], &last) != TCL_OK) {
- goto error;
- }
- }
- if ((last >= first) && (entryPtr->state == tkNormalUid)) {
- DeleteChars(entryPtr, first, last+1-first);
- }
- } else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) {
- if (argc != 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " get\"", (char *) NULL);
- goto error;
- }
- interp->result = entryPtr->string;
- } else if ((c == 'i') && (strncmp(argv[1], "index", length) == 0)
- && (length >= 2)) {
- int index;
-
- if (argc != 3) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " index string\"", (char *) NULL);
- goto error;
- }
- if (GetEntryIndex(interp, entryPtr, argv[2], &index) != TCL_OK) {
- goto error;
- }
- sprintf(interp->result, "%d", index);
- } else if ((c == 'i') && (strncmp(argv[1], "insert", length) == 0)
- && (length >= 2)) {
- int index;
-
- if (argc != 4) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " insert index text\"",
- (char *) NULL);
- goto error;
- }
- if (GetEntryIndex(interp, entryPtr, argv[2], &index) != TCL_OK) {
- goto error;
- }
- if (entryPtr->state == tkNormalUid) {
- InsertChars(entryPtr, index, argv[3]);
- }
- } else if ((c == 's') && (length >= 2)
- && (strncmp(argv[1], "scan", length) == 0)) {
- int x;
-
- if (argc != 4) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " scan mark|dragto x\"", (char *) NULL);
- goto error;
- }
- if (Tcl_GetInt(interp, argv[3], &x) != TCL_OK) {
- goto error;
- }
- if ((argv[2][0] == 'm')
- && (strncmp(argv[2], "mark", strlen(argv[2])) == 0)) {
- entryPtr->scanMarkX = x;
- entryPtr->scanMarkIndex = entryPtr->leftIndex;
- } else if ((argv[2][0] == 'd')
- && (strncmp(argv[2], "dragto", strlen(argv[2])) == 0)) {
- EntryScanTo(entryPtr, x);
- } else {
- Tcl_AppendResult(interp, "bad scan option \"", argv[2],
- "\": must be mark or dragto", (char *) NULL);
- goto error;
- }
- } else if ((c == 's') && (length >= 2)
- && (strncmp(argv[1], "select", length) == 0)) {
- int index;
-
- if (argc < 3) {
- Tcl_AppendResult(interp, "too few args: should be \"",
- argv[0], " select option ?index?\"", (char *) NULL);
- goto error;
- }
- length = strlen(argv[2]);
- c = argv[2][0];
- if ((c == 'c') && (argv[2] != NULL)
- && (strncmp(argv[2], "clear", length) == 0)) {
- if (argc != 3) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " select clear\"", (char *) NULL);
- goto error;
- }
- if (entryPtr->selectFirst != -1) {
- entryPtr->selectFirst = entryPtr->selectLast = -1;
- EventuallyRedraw(entryPtr);
- }
- goto done;
- }
- if (argc >= 4) {
- if (GetEntryIndex(interp, entryPtr, argv[3], &index) != TCL_OK) {
- goto error;
- }
- }
- if ((c == 'a') && (strncmp(argv[2], "adjust", length) == 0)) {
- if (argc != 4) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " select adjust index\"",
- (char *) NULL);
- goto error;
- }
- if (entryPtr->selectFirst >= 0) {
- if (index < (entryPtr->selectFirst + entryPtr->selectLast)/2) {
- entryPtr->selectAnchor = entryPtr->selectLast + 1;
- } else {
- entryPtr->selectAnchor = entryPtr->selectFirst;
- }
- }
- EntrySelectTo(entryPtr, index);
- } else if ((c == 'f') && (strncmp(argv[2], "from", length) == 0)) {
- if (argc != 4) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " select from index\"",
- (char *) NULL);
- goto error;
- }
- entryPtr->selectAnchor = index;
- } else if ((c == 't') && (strncmp(argv[2], "to", length) == 0)) {
- if (argc != 4) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " select to index\"",
- (char *) NULL);
- goto error;
- }
- EntrySelectTo(entryPtr, index);
- } else {
- Tcl_AppendResult(interp, "bad select option \"", argv[2],
- "\": must be adjust, clear, from, or to", (char *) NULL);
- goto error;
- }
- } else if ((c == 'v') && (strncmp(argv[1], "view", length) == 0)) {
- int index;
-
- if (argc != 3) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " view index\"", (char *) NULL);
- goto error;
- }
- if (GetEntryIndex(interp, entryPtr, argv[2], &index) != TCL_OK) {
- goto error;
- }
- if ((index >= entryPtr->numChars) && (index > 0)) {
- index = entryPtr->numChars-1;
- }
- entryPtr->leftIndex = index;
- EventuallyRedraw(entryPtr);
- EntryUpdateScrollbar(entryPtr);
- } else {
- Tcl_AppendResult(interp, "bad option \"", argv[1],
- "\": must be configure, cursor, delete, get, index, ",
- "insert, scan, select, or view", (char *) NULL);
- goto error;
- }
- done:
- Tk_Release((ClientData) entryPtr);
- return result;
-
- error:
- Tk_Release((ClientData) entryPtr);
- return TCL_ERROR;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * DestroyEntry --
- *
- * This procedure is invoked by Tk_EventuallyFree or Tk_Release
- * to clean up the internal structure of an entry at a safe time
- * (when no-one is using it anymore).
- *
- * Results:
- * None.
- *
- * Side effects:
- * Everything associated with the entry is freed up.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- DestroyEntry(clientData)
- ClientData clientData; /* Info about entry widget. */
- {
- register Entry *entryPtr = (Entry *) clientData;
-
- ckfree(entryPtr->string);
- if (entryPtr->normalBorder != NULL) {
- Tk_Free3DBorder(entryPtr->normalBorder);
- }
- if (entryPtr->textVarName != NULL) {
- Tcl_UntraceVar(entryPtr->interp, entryPtr->textVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- EntryTextVarProc, (ClientData) entryPtr);
- ckfree(entryPtr->textVarName);
- }
- if (entryPtr->fontPtr != NULL) {
- Tk_FreeFontStruct(entryPtr->fontPtr);
- }
- if (entryPtr->fgColorPtr != NULL) {
- Tk_FreeColor(entryPtr->fgColorPtr);
- }
- if (entryPtr->textGC != None) {
- Tk_FreeGC(entryPtr->textGC);
- }
- if (entryPtr->selBorder != NULL) {
- Tk_Free3DBorder(entryPtr->selBorder);
- }
- if (entryPtr->selFgColorPtr != NULL) {
- Tk_FreeColor(entryPtr->selFgColorPtr);
- }
- if (entryPtr->selTextGC != None) {
- Tk_FreeGC(entryPtr->selTextGC);
- }
- if (entryPtr->cursorBorder != NULL) {
- Tk_Free3DBorder(entryPtr->cursorBorder);
- }
- Tk_DeleteTimerHandler(entryPtr->cursorBlinkHandler);
- if (entryPtr->cursor != None) {
- Tk_FreeCursor(entryPtr->cursor);
- }
- if (entryPtr->scrollCmd != NULL) {
- ckfree(entryPtr->scrollCmd);
- }
- ckfree((char *) entryPtr);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * ConfigureEntry --
- *
- * This procedure is called to process an argv/argc list, plus
- * the Tk option database, in order to configure (or reconfigure)
- * an entry widget.
- *
- * Results:
- * The return value is a standard Tcl result. If TCL_ERROR is
- * returned, then interp->result contains an error message.
- *
- * Side effects:
- * Configuration information, such as colors, border width,
- * etc. get set for entryPtr; old resources get freed,
- * if there were any.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- ConfigureEntry(interp, entryPtr, argc, argv, flags)
- Tcl_Interp *interp; /* Used for error reporting. */
- register Entry *entryPtr; /* Information about widget; may or may
- * not already have values for some fields. */
- int argc; /* Number of valid entries in argv. */
- char **argv; /* Arguments. */
- int flags; /* Flags to pass to Tk_ConfigureWidget. */
- {
- XGCValues gcValues;
- GC new;
- int width, height, fontHeight, oldExport;
-
- /*
- * Eliminate any existing trace on a variable monitored by the entry.
- */
-
- if (entryPtr->textVarName != NULL) {
- Tcl_UntraceVar(interp, entryPtr->textVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- EntryTextVarProc, (ClientData) entryPtr);
- }
-
- oldExport = entryPtr->exportSelection;
- if (Tk_ConfigureWidget(interp, entryPtr->tkwin, configSpecs,
- argc, argv, (char *) entryPtr, flags) != TCL_OK) {
- return TCL_ERROR;
- }
-
- /*
- * If the entry is tied to the value of a variable, then set up
- * a trace on the variable's value, create the variable if it doesn't
- * exist, and set the entry's value from the variable's value.
- */
-
- if (entryPtr->textVarName != NULL) {
- char *value;
-
- value = Tcl_GetVar(interp, entryPtr->textVarName, TCL_GLOBAL_ONLY);
- if (value == NULL) {
- Tcl_SetVar(interp, entryPtr->textVarName, entryPtr->string,
- TCL_GLOBAL_ONLY);
- } else {
- EntrySetValue(entryPtr, value);
- }
- Tcl_TraceVar(interp, entryPtr->textVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- EntryTextVarProc, (ClientData) entryPtr);
- }
-
- /*
- * A few other options also need special processing, such as parsing
- * the geometry and setting the background from a 3-D border.
- */
-
- if ((entryPtr->state != tkNormalUid)
- && (entryPtr->state != tkDisabledUid)) {
- Tcl_AppendResult(interp, "bad state value \"", entryPtr->state,
- "\": must be normal or disabled", (char *) NULL);
- entryPtr->state = tkNormalUid;
- return TCL_ERROR;
- }
-
- Tk_SetBackgroundFromBorder(entryPtr->tkwin, entryPtr->normalBorder);
-
- gcValues.foreground = entryPtr->fgColorPtr->pixel;
- gcValues.font = entryPtr->fontPtr->fid;
- gcValues.graphics_exposures = False;
- new = Tk_GetGC(entryPtr->tkwin, GCForeground|GCFont|GCGraphicsExposures,
- &gcValues);
- if (entryPtr->textGC != None) {
- Tk_FreeGC(entryPtr->textGC);
- }
- entryPtr->textGC = new;
-
- gcValues.foreground = entryPtr->selFgColorPtr->pixel;
- gcValues.font = entryPtr->fontPtr->fid;
- new = Tk_GetGC(entryPtr->tkwin, GCForeground|GCFont, &gcValues);
- if (entryPtr->selTextGC != None) {
- Tk_FreeGC(entryPtr->selTextGC);
- }
- entryPtr->selTextGC = new;
-
- if (entryPtr->cursorWidth > 2*entryPtr->fontPtr->min_bounds.width) {
- entryPtr->cursorWidth = 2*entryPtr->fontPtr->min_bounds.width;
- if (entryPtr->cursorWidth == 0) {
- entryPtr->cursorWidth = 2;
- }
- }
- if (entryPtr->cursorBorderWidth > entryPtr->cursorWidth/2) {
- entryPtr->cursorBorderWidth = entryPtr->cursorWidth/2;
- }
-
- /*
- * Restart the cursor timing sequence in case the on-time or off-time
- * just changed.
- */
-
- if (entryPtr->flags & GOT_FOCUS) {
- EntryFocusProc((ClientData) entryPtr, 1);
- }
-
- /*
- * Claim the selection if we've suddenly started exporting it.
- */
-
- if (entryPtr->exportSelection && (!oldExport)
- && (entryPtr->selectFirst != -1)) {
- Tk_OwnSelection(entryPtr->tkwin, EntryLostSelection,
- (ClientData) entryPtr);
- }
-
- /*
- * Register the desired geometry for the window, and arrange for
- * the window to be redisplayed.
- */
-
- fontHeight = entryPtr->fontPtr->ascent + entryPtr->fontPtr->descent;
- entryPtr->avgWidth = XTextWidth(entryPtr->fontPtr, "0", 1);
- width = entryPtr->prefWidth*entryPtr->avgWidth + (15*fontHeight)/10;
- height = fontHeight + 2*entryPtr->borderWidth + 2;
- Tk_GeometryRequest(entryPtr->tkwin, width, height);
- Tk_SetInternalBorder(entryPtr->tkwin, entryPtr->borderWidth);
- if (entryPtr->relief != TK_RELIEF_FLAT) {
- entryPtr->offset = entryPtr->borderWidth;
- } else {
- entryPtr->offset = 0;
- }
- EventuallyRedraw(entryPtr);
- EntryUpdateScrollbar(entryPtr);
- return TCL_OK;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * DisplayEntry --
- *
- * This procedure redraws the contents of an entry window.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Information appears on the screen.
- *
- *--------------------------------------------------------------
- */
-
- static void
- DisplayEntry(clientData)
- ClientData clientData; /* Information about window. */
- {
- register Entry *entryPtr = (Entry *) clientData;
- register Tk_Window tkwin = entryPtr->tkwin;
- int startX, baseY, selStartX, selEndX, index, cursorX;
- int xBound, count;
- Pixmap pixmap;
-
- entryPtr->flags &= ~REDRAW_PENDING;
- if ((entryPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
- return;
- }
-
- /*
- * In order to avoid screen flashes, this procedure redraws the
- * textual area of the entry into off-screen memory, then copies
- * it back on-screen in a single operation. This means there's
- * no point in time where the on-screen image has been cleared.
- */
-
- pixmap = XCreatePixmap(Tk_Display(tkwin), Tk_WindowId(tkwin),
- Tk_Width(tkwin), Tk_Height(tkwin),
- DefaultDepthOfScreen(Tk_Screen(tkwin)));
-
- /*
- * Compute x-coordinate of the "leftIndex" character, plus limit
- * of visible x-coordinates (actually, pixel just after last visible
- * one), plus vertical position of baseline of text.
- */
-
- startX = entryPtr->offset;
- xBound = Tk_Width(tkwin) - entryPtr->offset;
- baseY = (Tk_Height(tkwin) + entryPtr->fontPtr->ascent
- - entryPtr->fontPtr->descent)/2;
-
- /*
- * Draw the background in three layers. From bottom to top the
- * layers are: normal background, selection background, and
- * insertion cursor background.
- */
-
- Tk_Fill3DRectangle(Tk_Display(tkwin), pixmap, entryPtr->normalBorder,
- 0, 0, Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
-
- if (entryPtr->selectLast >= entryPtr->leftIndex) {
- if (entryPtr->selectFirst <= entryPtr->leftIndex) {
- selStartX = startX;
- index = entryPtr->leftIndex;
- } else {
- (void) TkMeasureChars(entryPtr->fontPtr,
- entryPtr->string+entryPtr->leftIndex,
- entryPtr->selectFirst - entryPtr->leftIndex, startX,
- xBound, TK_PARTIAL_OK|TK_NEWLINES_NOT_SPECIAL, &selStartX);
- index = entryPtr->selectFirst;
- }
- if (selStartX < xBound) {
- (void) TkMeasureChars(entryPtr->fontPtr,
- entryPtr->string + index, entryPtr->selectLast +1 - index,
- selStartX, xBound, TK_PARTIAL_OK|TK_NEWLINES_NOT_SPECIAL,
- &selEndX);
- Tk_Fill3DRectangle(Tk_Display(tkwin), pixmap, entryPtr->selBorder,
- selStartX - entryPtr->selBorderWidth,
- baseY - entryPtr->fontPtr->ascent
- - entryPtr->selBorderWidth,
- (selEndX - selStartX) + 2*entryPtr->selBorderWidth,
- entryPtr->fontPtr->ascent + entryPtr->fontPtr->descent
- + 2*entryPtr->selBorderWidth,
- entryPtr->selBorderWidth, TK_RELIEF_RAISED);
- } else {
- selEndX = xBound;
- }
- }
-
- /*
- * Draw a special background for the insertion cursor, overriding
- * even the selection background. As a special hack to keep the
- * cursor visible on mono displays, write background in the cursor
- * area (instead of nothing) when the cursor isn't on. Otherwise
- * the selection would hide the cursor.
- */
-
- if ((entryPtr->cursorPos >= entryPtr->leftIndex)
- && (entryPtr->state == tkNormalUid)
- && (entryPtr->flags & GOT_FOCUS)) {
- (void) TkMeasureChars(entryPtr->fontPtr,
- entryPtr->string + entryPtr->leftIndex,
- entryPtr->cursorPos - entryPtr->leftIndex, startX,
- xBound, TK_PARTIAL_OK|TK_NEWLINES_NOT_SPECIAL, &cursorX);
- if (cursorX < xBound) {
- if (entryPtr->flags & CURSOR_ON) {
- Tk_Fill3DRectangle(Tk_Display(tkwin), pixmap,
- entryPtr->cursorBorder,
- cursorX - (entryPtr->cursorWidth)/2,
- baseY - entryPtr->fontPtr->ascent,
- entryPtr->cursorWidth,
- entryPtr->fontPtr->ascent + entryPtr->fontPtr->descent,
- entryPtr->cursorBorderWidth, TK_RELIEF_RAISED);
- } else if (DefaultDepthOfScreen(Tk_Screen(tkwin)) == 1) {
- Tk_Fill3DRectangle(Tk_Display(tkwin), pixmap,
- entryPtr->normalBorder,
- cursorX - (entryPtr->cursorWidth)/2,
- baseY - entryPtr->fontPtr->ascent,
- entryPtr->cursorWidth,
- entryPtr->fontPtr->ascent + entryPtr->fontPtr->descent,
- 0, TK_RELIEF_FLAT);
- }
- }
- }
-
- /*
- * Draw the text in three pieces: first the piece to the left of
- * the selection, then the selection, then the piece to the right
- * of the selection.
- */
-
- if (entryPtr->selectLast < entryPtr->leftIndex) {
- TkDisplayChars(Tk_Display(tkwin), pixmap, entryPtr->textGC,
- entryPtr->fontPtr, entryPtr->string + entryPtr->leftIndex,
- entryPtr->numChars - entryPtr->leftIndex, startX, baseY,
- TK_NEWLINES_NOT_SPECIAL);
- } else {
- count = entryPtr->selectFirst - entryPtr->leftIndex;
- if (count > 0) {
- TkDisplayChars(Tk_Display(tkwin), pixmap, entryPtr->textGC,
- entryPtr->fontPtr, entryPtr->string + entryPtr->leftIndex,
- count, startX, baseY, TK_NEWLINES_NOT_SPECIAL);
- index = entryPtr->selectFirst;
- } else {
- index = entryPtr->leftIndex;
- }
- count = entryPtr->selectLast + 1 - index;
- if ((selStartX < xBound) && (count > 0)) {
- TkDisplayChars(Tk_Display(tkwin), pixmap, entryPtr->selTextGC,
- entryPtr->fontPtr, entryPtr->string + index, count,
- selStartX, baseY, TK_NEWLINES_NOT_SPECIAL);
- }
- count = entryPtr->numChars - entryPtr->selectLast - 1;
- if ((selEndX < xBound) && (count > 0)) {
- TkDisplayChars(Tk_Display(tkwin), pixmap, entryPtr->textGC,
- entryPtr->fontPtr,
- entryPtr->string + entryPtr->selectLast + 1,
- count, selEndX, baseY, TK_NEWLINES_NOT_SPECIAL);
- }
- }
-
- /*
- * Draw the border last, so it will overwrite any text that extends
- * past the viewable part of the window.
- */
-
- if (entryPtr->relief != TK_RELIEF_FLAT) {
- Tk_Draw3DRectangle(Tk_Display(tkwin), pixmap,
- entryPtr->normalBorder, 0, 0, Tk_Width(tkwin),
- Tk_Height(tkwin), entryPtr->borderWidth,
- entryPtr->relief);
- }
-
- /*
- * Everything's been redisplayed; now copy the pixmap onto the screen
- * and free up the pixmap.
- */
-
- XCopyArea(Tk_Display(tkwin), pixmap, Tk_WindowId(tkwin), entryPtr->textGC,
- 0, 0, Tk_Width(tkwin), Tk_Height(tkwin), 0, 0);
- XFreePixmap(Tk_Display(tkwin), pixmap);
- entryPtr->flags &= ~BORDER_NEEDED;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * InsertChars --
- *
- * Add new characters to an entry widget.
- *
- * Results:
- * None.
- *
- * Side effects:
- * New information gets added to entryPtr; it will be redisplayed
- * soon, but not necessarily immediately.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- InsertChars(entryPtr, index, string)
- register Entry *entryPtr; /* Entry that is to get the new
- * elements. */
- int index; /* Add the new elements before this
- * element. */
- char *string; /* New characters to add (NULL-terminated
- * string). */
- {
- int length;
- char *new;
-
- length = strlen(string);
- if (length == 0) {
- return;
- }
- new = (char *) ckalloc((unsigned) (entryPtr->numChars + length + 1));
- strncpy(new, entryPtr->string, index);
- strcpy(new+index, string);
- strcpy(new+index+length, entryPtr->string+index);
- ckfree(entryPtr->string);
- entryPtr->string = new;
- entryPtr->numChars += length;
-
- /*
- * Inserting characters invalidates all indexes into the string.
- * Touch up the indexes so that they still refer to the same
- * characters (at new positions).
- */
-
- if (entryPtr->selectFirst >= index) {
- entryPtr->selectFirst += length;
- }
- if (entryPtr->selectLast >= index) {
- entryPtr->selectLast += length;
- }
- if (entryPtr->selectAnchor >= index) {
- entryPtr->selectAnchor += length;
- }
- if (entryPtr->leftIndex > index) {
- entryPtr->leftIndex += length;
- }
- if (entryPtr->cursorPos >= index) {
- entryPtr->cursorPos += length;
- }
-
- if (entryPtr->textVarName != NULL) {
- Tcl_SetVar(entryPtr->interp, entryPtr->textVarName, entryPtr->string,
- TCL_GLOBAL_ONLY);
- }
- EventuallyRedraw(entryPtr);
- EntryUpdateScrollbar(entryPtr);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * DeleteChars --
- *
- * Remove one or more characters from an entry widget.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Memory gets freed, the entry gets modified and (eventually)
- * redisplayed.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- DeleteChars(entryPtr, index, count)
- register Entry *entryPtr; /* Entry widget to modify. */
- int index; /* Index of first character to delete. */
- int count; /* How many characters to delete. */
- {
- char *new;
-
- if ((index + count) > entryPtr->numChars) {
- count = entryPtr->numChars - index;
- }
- if (count <= 0) {
- return;
- }
-
- new = (char *) ckalloc((unsigned) (entryPtr->numChars + 1 - count));
- strncpy(new, entryPtr->string, index);
- strcpy(new+index, entryPtr->string+index+count);
- ckfree(entryPtr->string);
- entryPtr->string = new;
- entryPtr->numChars -= count;
-
- /*
- * Deleting characters results in the remaining characters being
- * renumbered. Update the various indexes into the string to reflect
- * this change.
- */
- if (entryPtr->selectFirst >= index) {
- if (entryPtr->selectFirst >= (index+count)) {
- entryPtr->selectFirst -= count;
- } else {
- entryPtr->selectFirst = index;
- }
- }
- if (entryPtr->selectLast >= index) {
- if (entryPtr->selectLast >= (index+count)) {
- entryPtr->selectLast -= count;
- } else {
- entryPtr->selectLast = index-1;
- }
- }
- if (entryPtr->selectLast < entryPtr->selectFirst) {
- entryPtr->selectFirst = entryPtr->selectLast = -1;
- }
- if (entryPtr->selectAnchor >= index) {
- if (entryPtr->selectAnchor >= (index+count)) {
- entryPtr->selectAnchor -= count;
- } else {
- entryPtr->selectAnchor = index;
- }
- }
- if (entryPtr->leftIndex > index) {
- if (entryPtr->leftIndex >= (index+count)) {
- entryPtr->leftIndex -= count;
- } else {
- entryPtr->leftIndex = index;
- }
- }
- if (entryPtr->cursorPos >= index) {
- if (entryPtr->cursorPos >= (index+count)) {
- entryPtr->cursorPos -= count;
- } else {
- entryPtr->cursorPos = index;
- }
- }
-
- if (entryPtr->textVarName != NULL) {
- Tcl_SetVar(entryPtr->interp, entryPtr->textVarName, entryPtr->string,
- TCL_GLOBAL_ONLY);
- }
- EventuallyRedraw(entryPtr);
- EntryUpdateScrollbar(entryPtr);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * EntrySetValue --
- *
- * Replace the contents of a text entry with a given value. This
- * procedure is invoked when updating the entry from the entry's
- * associated variable.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The string displayed in the entry will change. Any selection
- * in the entry is lost and the insertion point gets set to the
- * end of the entry. Note: this procedure does *not* update the
- * entry's associated variable, since that could result in an
- * infinite loop.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- EntrySetValue(entryPtr, value)
- register Entry *entryPtr; /* Entry whose value is to be
- * changed. */
- char *value; /* New text to display in entry. */
- {
- ckfree(entryPtr->string);
- entryPtr->numChars = strlen(value);
- entryPtr->string = (char *) ckalloc((unsigned) (entryPtr->numChars + 1));
- strcpy(entryPtr->string, value);
- entryPtr->selectFirst = -1;
- entryPtr->leftIndex = 0;
- entryPtr->cursorPos = entryPtr->numChars;
-
- EventuallyRedraw(entryPtr);
- EntryUpdateScrollbar(entryPtr);
- }
-
- /*
- *--------------------------------------------------------------
- *
- * EntryEventProc --
- *
- * This procedure is invoked by the Tk dispatcher for various
- * events on entryes.
- *
- * Results:
- * None.
- *
- * Side effects:
- * When the window gets deleted, internal structures get
- * cleaned up. When it gets exposed, it is redisplayed.
- *
- *--------------------------------------------------------------
- */
-
- static void
- EntryEventProc(clientData, eventPtr)
- ClientData clientData; /* Information about window. */
- XEvent *eventPtr; /* Information about event. */
- {
- Entry *entryPtr = (Entry *) clientData;
- if (eventPtr->type == Expose) {
- EventuallyRedraw(entryPtr);
- entryPtr->flags |= BORDER_NEEDED;
- } else if (eventPtr->type == DestroyNotify) {
- Tcl_DeleteCommand(entryPtr->interp, Tk_PathName(entryPtr->tkwin));
- entryPtr->tkwin = NULL;
- if (entryPtr->flags & REDRAW_PENDING) {
- Tk_CancelIdleCall(DisplayEntry, (ClientData) entryPtr);
- }
- Tk_EventuallyFree((ClientData) entryPtr, DestroyEntry);
- } else if (eventPtr->type == ConfigureNotify) {
- Tk_Preserve((ClientData) entryPtr);
- EventuallyRedraw(entryPtr);
- EntryUpdateScrollbar(entryPtr);
- Tk_Release((ClientData) entryPtr);
- }
- }
-
- /*
- *--------------------------------------------------------------
- *
- * GetEntryIndex --
- *
- * Parse an index into an entry 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 entryPtr) corresponding to
- * string. The index value is guaranteed to lie between 0 and
- * the number of characters in the string, inclusive. If an
- * error occurs then an error message is left in interp->result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
- static int
- GetEntryIndex(interp, entryPtr, string, indexPtr)
- Tcl_Interp *interp; /* For error messages. */
- Entry *entryPtr; /* Entry for which the index is being
- * specified. */
- char *string; /* Specifies character in entryPtr. */
- int *indexPtr; /* Where to store converted index. */
- {
- int length;
-
- length = strlen(string);
-
- if (string[0] == 'e') {
- if (strncmp(string, "end", length) == 0) {
- *indexPtr = entryPtr->numChars;
- } else {
- badIndex:
-
- /*
- * Some of the paths here leave messages in interp->result,
- * so we have to clear it out before storing our own message.
- */
-
- Tcl_SetResult(interp, (char *) NULL, TCL_STATIC);
- Tcl_AppendResult(interp, "bad entry index \"", string,
- "\"", (char *) NULL);
- return TCL_ERROR;
- }
- } else if (string[0] == 'c') {
- if (strncmp(string, "cursor", length) == 0) {
- *indexPtr = entryPtr->cursorPos;
- } else {
- goto badIndex;
- }
- } else if (string[0] == 's') {
- if (entryPtr->selectFirst == -1) {
- interp->result = "selection isn't in entry";
- return TCL_ERROR;
- }
- if (length < 5) {
- goto badIndex;
- }
- if (strncmp(string, "sel.first", length) == 0) {
- *indexPtr = entryPtr->selectFirst;
- } else if (strncmp(string, "sel.last", length) == 0) {
- *indexPtr = entryPtr->selectLast;
- } else {
- goto badIndex;
- }
- } else if (string[0] == '@') {
- int x, dummy;
-
- if (Tcl_GetInt(interp, string+1, &x) != TCL_OK) {
- goto badIndex;
- }
- if (entryPtr->numChars == 0) {
- *indexPtr = 0;
- } else {
- *indexPtr = entryPtr->leftIndex + TkMeasureChars(entryPtr->fontPtr,
- entryPtr->string + entryPtr->leftIndex,
- entryPtr->numChars - entryPtr->leftIndex,
- entryPtr->offset, x, TK_NEWLINES_NOT_SPECIAL, &dummy);
- }
- } else {
- if (Tcl_GetInt(interp, string, indexPtr) != TCL_OK) {
- goto badIndex;
- }
- if (*indexPtr < 0){
- *indexPtr = 0;
- } else if (*indexPtr > entryPtr->numChars) {
- *indexPtr = entryPtr->numChars;
- }
- }
- return TCL_OK;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * EntryScanTo --
- *
- * Given a y-coordinate (presumably of the curent mouse location)
- * drag the view in the window to implement the scan operation.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The view in the window may change.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- EntryScanTo(entryPtr, x)
- register Entry *entryPtr; /* Information about widget. */
- int x; /* X-coordinate to use for scan
- * operation. */
- {
- int newLeftIndex;
-
- /*
- * Compute new leftIndex for entry by amplifying the difference
- * between the current position and the place where the scan
- * started (the "mark" position). If we run off the left or right
- * side of the entry, then reset the mark point so that the current
- * position continues to correspond to the edge of the window.
- * This means that the picture will start dragging as soon as the
- * mouse reverses direction (without this reset, might have to slide
- * mouse a long ways back before the picture starts moving again).
- */
-
- newLeftIndex = entryPtr->scanMarkIndex
- - (10*(x - entryPtr->scanMarkX))/entryPtr->avgWidth;
- if (newLeftIndex >= entryPtr->numChars) {
- newLeftIndex = entryPtr->scanMarkIndex = entryPtr->numChars-1;
- entryPtr->scanMarkX = x;
- }
- if (newLeftIndex < 0) {
- newLeftIndex = entryPtr->scanMarkIndex = 0;
- entryPtr->scanMarkX = x;
- }
- if (newLeftIndex != entryPtr->leftIndex) {
- entryPtr->leftIndex = newLeftIndex;
- EventuallyRedraw(entryPtr);
- EntryUpdateScrollbar(entryPtr);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * EntrySelectTo --
- *
- * Modify the selection by moving its un-anchored end. This could
- * make the selection either larger or smaller.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The selection changes.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- EntrySelectTo(entryPtr, index)
- register Entry *entryPtr; /* Information about widget. */
- int index; /* Index of element that is to
- * become the "other" end of the
- * selection. */
- {
- int newFirst, newLast;
-
- /*
- * Grab the selection if we don't own it already.
- */
-
- if ((entryPtr->selectFirst == -1) && (entryPtr->exportSelection)) {
- Tk_OwnSelection(entryPtr->tkwin, EntryLostSelection,
- (ClientData) entryPtr);
- }
-
- if (index < 0) {
- index = 0;
- }
- if (index >= entryPtr->numChars) {
- index = entryPtr->numChars-1;
- }
- if (entryPtr->selectAnchor > entryPtr->numChars) {
- entryPtr->selectAnchor = entryPtr->numChars;
- }
- if (entryPtr->selectAnchor <= index) {
- newFirst = entryPtr->selectAnchor;
- newLast = index;
- } else {
- newFirst = index;
- newLast = entryPtr->selectAnchor - 1;
- if (newLast < 0) {
- newFirst = newLast = -1;
- }
- }
- if ((entryPtr->selectFirst == newFirst)
- && (entryPtr->selectLast == newLast)) {
- return;
- }
- entryPtr->selectFirst = newFirst;
- entryPtr->selectLast = newLast;
- EventuallyRedraw(entryPtr);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * EntryFetchSelection --
- *
- * This procedure is called back by Tk when the selection is
- * requested by someone. It returns part or all of the selection
- * in a buffer provided by the caller.
- *
- * 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
- EntryFetchSelection(clientData, offset, buffer, maxBytes)
- ClientData clientData; /* Information about entry widget. */
- int offset; /* 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. */
- {
- Entry *entryPtr = (Entry *) clientData;
- int count;
-
- if ((entryPtr->selectFirst < 0) || !(entryPtr->exportSelection)) {
- return -1;
- }
- count = entryPtr->selectLast + 1 - entryPtr->selectFirst - offset;
- if (count > maxBytes) {
- count = maxBytes;
- }
- if (count <= 0) {
- return 0;
- }
- strncpy(buffer, entryPtr->string + entryPtr->selectFirst + offset, count);
- buffer[count] = '\0';
- return count;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * EntryLostSelection --
- *
- * This procedure is called back by Tk when the selection is
- * grabbed away from an entry widget.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The existing selection is unhighlighted, and the window is
- * marked as not containing a selection.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- EntryLostSelection(clientData)
- ClientData clientData; /* Information about entry widget. */
- {
- Entry *entryPtr = (Entry *) clientData;
-
- if ((entryPtr->selectFirst != -1) && entryPtr->exportSelection) {
- entryPtr->selectFirst = -1;
- entryPtr->selectLast = -1;
- EventuallyRedraw(entryPtr);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * EventuallyRedraw --
- *
- * Ensure that an entry is eventually redrawn on the display.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Information gets redisplayed. Right now we don't do selective
- * redisplays: the whole window will be redrawn. This doesn't
- * seem to hurt performance noticeably, but if it does then this
- * could be changed.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- EventuallyRedraw(entryPtr)
- register Entry *entryPtr; /* Information about widget. */
- {
- if ((entryPtr->tkwin == NULL) || !Tk_IsMapped(entryPtr->tkwin)) {
- return;
- }
-
- /*
- * Right now we don't do selective redisplays: the whole window
- * will be redrawn. This doesn't seem to hurt performance noticeably,
- * but if it does then this could be changed.
- */
-
- if (!(entryPtr->flags & REDRAW_PENDING)) {
- entryPtr->flags |= REDRAW_PENDING;
- Tk_DoWhenIdle(DisplayEntry, (ClientData) entryPtr);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * EntryUpdateScrollbar --
- *
- * This procedure is invoked whenever information has changed in
- * an entry in a way that would invalidate a scrollbar display.
- * If there is an associated scrollbar, then this command updates
- * it by invoking a Tcl command.
- *
- * Results:
- * None.
- *
- * Side effects:
- * A Tcl command is invoked, and an additional command may be
- * invoked to process errors in the command.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- EntryUpdateScrollbar(entryPtr)
- register Entry *entryPtr; /* Information about widget. */
- {
- char args[100];
- int result, last, charsInWindow, endX;
-
- if (entryPtr->scrollCmd == NULL) {
- return;
- }
-
- /*
- * The most painful part here is guessing how many characters
- * actually fit in the window. This is only an estimate in the
- * case where the window isn't completely filled with characters.
- */
-
- charsInWindow = TkMeasureChars(entryPtr->fontPtr,
- entryPtr->string + entryPtr->leftIndex,
- entryPtr->numChars - entryPtr->leftIndex, entryPtr->offset,
- Tk_Width(entryPtr->tkwin),
- TK_AT_LEAST_ONE|TK_NEWLINES_NOT_SPECIAL, &endX);
- if (charsInWindow == 0) {
- last = entryPtr->leftIndex;
- } else {
- last = entryPtr->leftIndex + charsInWindow - 1;
- }
- if (endX < Tk_Width(entryPtr->tkwin)) {
- charsInWindow += (Tk_Width(entryPtr->tkwin) - endX)/entryPtr->avgWidth;
- }
- sprintf(args, " %d %d %d %d", entryPtr->numChars, charsInWindow,
- entryPtr->leftIndex, last);
- result = Tcl_VarEval(entryPtr->interp, entryPtr->scrollCmd, args,
- (char *) NULL);
- if (result != TCL_OK) {
- TkBindError(entryPtr->interp);
- }
- Tcl_SetResult(entryPtr->interp, (char *) NULL, TCL_STATIC);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * EntryBlinkProc --
- *
- * This procedure is called as a timer handler to blink the
- * insertion cursor off and on.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The cursor gets turned on or off, redisplay gets invoked,
- * and this procedure reschedules itself.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- EntryBlinkProc(clientData)
- ClientData clientData; /* Pointer to record describing entry. */
- {
- register Entry *entryPtr = (Entry *) clientData;
-
- if (!(entryPtr->flags & GOT_FOCUS) || (entryPtr->cursorOffTime == 0)) {
- return;
- }
- if (entryPtr->flags & CURSOR_ON) {
- entryPtr->flags &= ~CURSOR_ON;
- entryPtr->cursorBlinkHandler = Tk_CreateTimerHandler(
- entryPtr->cursorOffTime, EntryBlinkProc, (ClientData) entryPtr);
- } else {
- entryPtr->flags |= CURSOR_ON;
- entryPtr->cursorBlinkHandler = Tk_CreateTimerHandler(
- entryPtr->cursorOnTime, EntryBlinkProc, (ClientData) entryPtr);
- }
- EventuallyRedraw(entryPtr);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * EntryFocusProc --
- *
- * This procedure is called whenever the entry gets or loses the
- * input focus. It's also called whenever the window is reconfigured
- * while it has the focus.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The cursor gets turned on or off.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- EntryFocusProc(clientData, gotFocus)
- ClientData clientData; /* Pointer to structure describing entry. */
- int gotFocus; /* 1 means window is getting focus, 0 means
- * it's losing it. */
- {
- register Entry *entryPtr = (Entry *) clientData;
-
- Tk_DeleteTimerHandler(entryPtr->cursorBlinkHandler);
- if (gotFocus) {
- entryPtr->flags |= GOT_FOCUS | CURSOR_ON;
- if (entryPtr->cursorOffTime != 0) {
- entryPtr->cursorBlinkHandler = Tk_CreateTimerHandler(
- entryPtr->cursorOnTime, EntryBlinkProc,
- (ClientData) entryPtr);
- }
- } else {
- entryPtr->flags &= ~(GOT_FOCUS | CURSOR_ON);
- entryPtr->cursorBlinkHandler = (Tk_TimerToken) NULL;
- }
- EventuallyRedraw(entryPtr);
- }
-
- /*
- *--------------------------------------------------------------
- *
- * EntryTextVarProc --
- *
- * This procedure is invoked when someone changes the variable
- * whose contents are to be displayed in an entry.
- *
- * Results:
- * NULL is always returned.
- *
- * Side effects:
- * The text displayed in the entry will change to match the
- * variable.
- *
- *--------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static char *
- EntryTextVarProc(clientData, interp, name1, name2, flags)
- ClientData clientData; /* Information about button. */
- Tcl_Interp *interp; /* Interpreter containing variable. */
- char *name1; /* Name of variable. */
- char *name2; /* Second part of variable name. */
- int flags; /* Information about what happened. */
- {
- register Entry *entryPtr = (Entry *) clientData;
- char *value;
-
- /*
- * If the variable is unset, then immediately recreate it unless
- * the whole interpreter is going away.
- */
-
- if (flags & TCL_TRACE_UNSETS) {
- if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {
- Tcl_SetVar2(interp, name1, name2, entryPtr->string,
- flags & TCL_GLOBAL_ONLY);
- Tcl_TraceVar2(interp, name1, name2,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- EntryTextVarProc, clientData);
- }
- return (char *) NULL;
- }
-
- /*
- * Update the entry's text with the value of the variable, unless
- * the entry already has that value (this happens when the variable
- * changes value because we changed it because someone typed in
- * the entry).
- */
-
- value = Tcl_GetVar2(interp, name1, name2, flags & TCL_GLOBAL_ONLY);
- if (value == NULL) {
- value = "";
- }
- if (strcmp(value, entryPtr->string) != 0) {
- EntrySetValue(entryPtr, value);
- }
- return (char *) NULL;
- }
-