/*
* 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;
}