Initial revision

1 files changed, 2313 insertions, 0 deletions

diff --git a/generic/tkEntry.c b/generic/tkEntry.c
new file mode 100644
index 0000000..35cc66c
--- /dev/null
+++ b/generic/tkEntry.c
@@ -0,0 +1,2313 @@
+/* 
+ * tkEntry.c --
+ *
+ *	This module implements entry widgets for the Tk
+ *	toolkit.  An entry displays a string and allows
+ *	the string to be edited.
+ *
+ * Copyright (c) 1990-1994 The Regents of the University of California.
+ * Copyright (c) 1994-1996 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tkEntry.c 1.112 97/11/06 16:56:16
+ */
+
+#include "tkInt.h"
+#include "default.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.*/
+    Display *display;		/* Display containing widget.  Used, among
+				 * other things, so that resources can be
+				 * freed even after tkwin has gone away. */
+    Tcl_Interp *interp;		/* Interpreter associated with entry. */
+    Tcl_Command widgetCmd;	/* Token for entry's widget command. */
+
+    /*
+     * Fields that are set by widget commands other than "configure".
+     */
+     
+    char *string;		/* Pointer to storage for string;
+				 * NULL-terminated;  malloc-ed. */
+    int insertPos;		/* 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). */
+
+    /*
+     * 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. */
+
+    /*
+     * Configuration settings that are updated by Tk_ConfigureWidget.
+     */
+
+    Tk_3DBorder normalBorder;	/* Used for drawing border around whole
+				 * window, plus used for background. */
+    int borderWidth;		/* Width of 3-D border around window. */
+    Tk_Cursor cursor;		/* Current cursor for window, or None. */
+    int exportSelection;	/* Non-zero means tie internal entry selection
+				 * to X selection. */
+    Tk_Font tkfont;		/* Information about text font, or NULL. */
+    XColor *fgColorPtr;		/* Text color in normal mode. */
+    XColor *highlightBgColorPtr;/* Color for drawing traversal highlight
+				 * area when highlight is off. */
+    XColor *highlightColorPtr;	/* Color for drawing traversal highlight. */
+    int highlightWidth;		/* Width in pixels of highlight to draw
+				 * around widget when it has the focus.
+				 * <= 0 means don't draw a highlight. */
+    Tk_3DBorder insertBorder;	/* Used to draw vertical bar for insertion
+				 * cursor. */
+    int insertBorderWidth;	/* Width of 3-D border around insert cursor. */
+    int insertOffTime;		/* Number of milliseconds cursor should spend
+				 * in "off" state for each blink. */
+    int insertOnTime;		/* Number of milliseconds cursor should spend
+				 * in "on" state for each blink. */
+    int insertWidth;		/* Total width of insert cursor. */
+    Tk_Justify justify;		/* Justification to use for text within
+				 * window. */
+    int relief;			/* 3-D effect: TK_RELIEF_RAISED, etc. */
+    Tk_3DBorder selBorder;	/* Border and background for selected
+				 * characters. */
+    int selBorderWidth;		/* Width of border around selection. */
+    XColor *selFgColorPtr;	/* Foreground color for selected text. */
+    char *showChar;		/* Value of -show option.  If non-NULL, first
+				 * character is used for displaying all
+				 * characters in entry.  Malloc'ed. */
+    Tk_Uid state;		/* Normal or disabled.  Entry is read-only
+				 * when disabled. */
+    char *textVarName;		/* Name of variable (malloc'ed) or NULL.
+				 * If non-NULL, entry's string tracks the
+				 * contents of this variable and vice versa. */
+    char *takeFocus;		/* Value of -takefocus option;  not used in
+				 * the C code, but used by keyboard traversal
+				 * scripts.  Malloc'ed, but may be NULL. */
+    int prefWidth;		/* Desired width of window, measured in
+				 * average characters. */
+    char *scrollCmd;		/* Command prefix for communicating with
+				 * scrollbar(s).  Malloc'ed.  NULL means
+				 * no command to issue. */
+
+    /*
+     * Fields whose values are derived from the current values of the
+     * configuration settings above.
+     */
+
+    int numChars;		/* Number of non-NULL characters in
+				 * string (may be 0). */
+    char *displayString;	/* If non-NULL, points to string with same
+				 * length as string but whose characters
+				 * are all equal to showChar.  Malloc'ed. */
+    int inset;			/* Number of pixels on the left and right
+				 * sides that are taken up by XPAD, borderWidth
+				 * (if any), and highlightWidth (if any). */
+    Tk_TextLayout textLayout;	/* Cached text layout information. */
+    int layoutX, layoutY;	/* Origin for layout. */
+    int leftIndex;		/* Index of left-most character visible in
+				 * window. */
+    int leftX;			/* X position at which character at leftIndex
+				 * is drawn (varies depending on justify). */
+    Tcl_TimerToken insertBlinkHandler;
+				/* Timer handler used to blink cursor on and
+				 * off. */
+    GC textGC;			/* For drawing normal text. */
+    GC selTextGC;		/* For drawing selected text. */
+    GC highlightGC;		/* For drawing traversal highlight. */
+    int avgWidth;		/* Width of average character. */
+    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 insert cursor is displayed at
+ *				present.  0 means it isn't displayed.
+ * GOT_FOCUS:			Non-zero means this window has the input
+ *				focus.
+ * UPDATE_SCROLLBAR:		Non-zero means scrollbar should be updated
+ *				during next redisplay operation.
+ * GOT_SELECTION:		Non-zero means we've claimed the selection.
+ */
+
+#define REDRAW_PENDING		1
+#define BORDER_NEEDED		2
+#define CURSOR_ON		4
+#define GOT_FOCUS		8
+#define UPDATE_SCROLLBAR	0x10
+#define GOT_SELECTION		0x20
+
+/*
+ * The following macro defines how many extra pixels to leave on each
+ * side of the text in the entry.
+ */
+
+#define XPAD 1
+#define YPAD 1
+
+/*
+ * 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_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, tkfont), 0},
+    {TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
+	DEF_ENTRY_FG, Tk_Offset(Entry, fgColorPtr), 0},
+    {TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
+	"HighlightBackground", DEF_ENTRY_HIGHLIGHT_BG,
+	Tk_Offset(Entry, highlightBgColorPtr), 0},
+    {TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
+	DEF_ENTRY_HIGHLIGHT, Tk_Offset(Entry, highlightColorPtr), 0},
+    {TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
+	"HighlightThickness",
+	DEF_ENTRY_HIGHLIGHT_WIDTH, Tk_Offset(Entry, highlightWidth), 0},
+    {TK_CONFIG_BORDER, "-insertbackground", "insertBackground", "Foreground",
+	DEF_ENTRY_INSERT_BG, Tk_Offset(Entry, insertBorder), 0},
+    {TK_CONFIG_PIXELS, "-insertborderwidth", "insertBorderWidth", "BorderWidth",
+	DEF_ENTRY_INSERT_BD_COLOR, Tk_Offset(Entry, insertBorderWidth),
+	TK_CONFIG_COLOR_ONLY},
+    {TK_CONFIG_PIXELS, "-insertborderwidth", "insertBorderWidth", "BorderWidth",
+	DEF_ENTRY_INSERT_BD_MONO, Tk_Offset(Entry, insertBorderWidth),
+	TK_CONFIG_MONO_ONLY},
+    {TK_CONFIG_INT, "-insertofftime", "insertOffTime", "OffTime",
+	DEF_ENTRY_INSERT_OFF_TIME, Tk_Offset(Entry, insertOffTime), 0},
+    {TK_CONFIG_INT, "-insertontime", "insertOnTime", "OnTime",
+	DEF_ENTRY_INSERT_ON_TIME, Tk_Offset(Entry, insertOnTime), 0},
+    {TK_CONFIG_PIXELS, "-insertwidth", "insertWidth", "InsertWidth",
+	DEF_ENTRY_INSERT_WIDTH, Tk_Offset(Entry, insertWidth), 0},
+    {TK_CONFIG_JUSTIFY, "-justify", "justify", "Justify",
+	DEF_ENTRY_JUSTIFY, Tk_Offset(Entry, justify), 0},
+    {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
+	DEF_ENTRY_RELIEF, Tk_Offset(Entry, relief), 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_STRING, "-show", "show", "Show",
+	DEF_ENTRY_SHOW, Tk_Offset(Entry, showChar), TK_CONFIG_NULL_OK},
+    {TK_CONFIG_UID, "-state", "state", "State",
+	DEF_ENTRY_STATE, Tk_Offset(Entry, state), 0},
+    {TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
+	DEF_ENTRY_TAKE_FOCUS, Tk_Offset(Entry, takeFocus), TK_CONFIG_NULL_OK},
+    {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_STRING, "-xscrollcommand", "xScrollCommand", "ScrollCommand",
+	DEF_ENTRY_SCROLL_COMMAND, Tk_Offset(Entry, scrollCmd),
+	TK_CONFIG_NULL_OK},
+    {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_((char *memPtr));
+static void		DisplayEntry _ANSI_ARGS_((ClientData clientData));
+static void		EntryBlinkProc _ANSI_ARGS_((ClientData clientData));
+static void		EntryCmdDeletedProc _ANSI_ARGS_((
+			    ClientData clientData));
+static void		EntryComputeGeometry _ANSI_ARGS_((Entry *entryPtr));
+static void		EntryEventProc _ANSI_ARGS_((ClientData clientData,
+			    XEvent *eventPtr));
+static void		EntryFocusProc _ANSI_ARGS_ ((Entry *entryPtr,
+			    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 void		EntryValueChanged _ANSI_ARGS_((Entry *entryPtr));
+static void		EntryVisibleRange _ANSI_ARGS_((Entry *entryPtr,
+			    double *firstPtr, double *lastPtr));
+static int		EntryWidgetCmd _ANSI_ARGS_((ClientData clientData,
+			    Tcl_Interp *interp, int argc, char **argv));
+static void		EntryWorldChanged _ANSI_ARGS_((
+			    ClientData instanceData));
+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));
+
+/*
+ * The structure below defines entry class behavior by means of procedures
+ * that can be invoked from generic window code.
+ */
+
+static TkClassProcs entryClass = {
+    NULL,			/* createProc. */
+    EntryWorldChanged,		/* geometryProc. */
+    NULL			/* modalProc. */
+};
+
+
+/*
+ *--------------------------------------------------------------
+ *
+ * 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->display = Tk_Display(new);
+    entryPtr->interp = interp;
+    entryPtr->widgetCmd = Tcl_CreateCommand(interp,
+	    Tk_PathName(entryPtr->tkwin), EntryWidgetCmd,
+	    (ClientData) entryPtr, EntryCmdDeletedProc);
+    entryPtr->string = (char *) ckalloc(1);
+    entryPtr->string[0] = '\0';
+    entryPtr->insertPos = 0;
+    entryPtr->selectFirst = -1;
+    entryPtr->selectLast = -1;
+    entryPtr->selectAnchor = 0;
+    entryPtr->scanMarkX = 0;
+    entryPtr->scanMarkIndex = 0;
+
+    entryPtr->normalBorder = NULL;
+    entryPtr->borderWidth = 0;
+    entryPtr->cursor = None;
+    entryPtr->exportSelection = 1;
+    entryPtr->tkfont = NULL;
+    entryPtr->fgColorPtr = NULL;
+    entryPtr->highlightBgColorPtr = NULL;
+    entryPtr->highlightColorPtr = NULL;
+    entryPtr->highlightWidth = 0;
+    entryPtr->insertBorder = NULL;
+    entryPtr->insertBorderWidth = 0;
+    entryPtr->insertOffTime = 0;
+    entryPtr->insertOnTime = 0;
+    entryPtr->insertWidth = 0;
+    entryPtr->justify = TK_JUSTIFY_LEFT;
+    entryPtr->relief = TK_RELIEF_FLAT;
+    entryPtr->selBorder = NULL;
+    entryPtr->selBorderWidth = 0;
+    entryPtr->selFgColorPtr = NULL;
+    entryPtr->showChar = NULL;
+    entryPtr->state = tkNormalUid;
+    entryPtr->textVarName = NULL;
+    entryPtr->takeFocus = NULL;
+    entryPtr->prefWidth = 0;
+    entryPtr->scrollCmd = NULL;
+
+    entryPtr->numChars = 0;
+    entryPtr->displayString = NULL;
+    entryPtr->inset = XPAD;
+    entryPtr->textLayout = NULL;
+    entryPtr->layoutX = 0;
+    entryPtr->layoutY = 0;
+    entryPtr->leftIndex = 0;
+    entryPtr->leftX = 0;
+    entryPtr->insertBlinkHandler = (Tcl_TimerToken) NULL;
+    entryPtr->textGC = None;
+    entryPtr->selTextGC = None;
+    entryPtr->highlightGC = None;
+    entryPtr->avgWidth = 1;
+    entryPtr->flags = 0;
+
+    Tk_SetClass(entryPtr->tkwin, "Entry");
+    TkSetClassProcs(entryPtr->tkwin, &entryClass, (ClientData) entryPtr);
+    Tk_CreateEventHandler(entryPtr->tkwin,
+	    ExposureMask|StructureNotifyMask|FocusChangeMask,
+	    EntryEventProc, (ClientData) entryPtr);
+    Tk_CreateSelHandler(entryPtr->tkwin, XA_PRIMARY, XA_STRING,
+	    EntryFetchSelection, (ClientData) entryPtr, XA_STRING);
+    if (ConfigureEntry(interp, entryPtr, argc-2, argv+2, 0) != TCL_OK) {
+	goto error;
+    }
+
+    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;
+    size_t length;
+    int c;
+
+    if (argc < 2) {
+	Tcl_AppendResult(interp, "wrong # args: should be \"",
+		argv[0], " option ?arg arg ...?\"", (char *) NULL);
+	return TCL_ERROR;
+    }
+    Tcl_Preserve((ClientData) entryPtr);
+    c = argv[1][0];
+    length = strlen(argv[1]);
+    if ((c == 'b') && (strncmp(argv[1], "bbox", length) == 0)) {
+	int index;
+	int x, y, width, height;
+
+	if (argc != 3) {
+	    Tcl_AppendResult(interp, "wrong # args: should be \"",
+		    argv[0], " bbox index\"",
+		    (char *) NULL);
+	    goto error;
+	}
+	if (GetEntryIndex(interp, entryPtr, argv[2], &index) != TCL_OK) {
+	    goto error;
+	}
+	if ((index == entryPtr->numChars) && (index > 0)) {
+	    index--;
+	}
+	Tk_CharBbox(entryPtr->textLayout, index, &x, &y, &width, &height);
+	sprintf(interp->result, "%d %d %d %d",
+		x + entryPtr->layoutX, y + entryPtr->layoutY, width, height);
+    } else if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0)
+	    && (length >= 2)) {
+	if (argc != 3) {
+	    Tcl_AppendResult(interp, "wrong # args: should be \"",
+		    argv[0], " cget option\"",
+		    (char *) NULL);
+	    goto error;
+	}
+	result = Tk_ConfigureValue(interp, entryPtr->tkwin, configSpecs,
+		(char *) entryPtr, argv[2], 0);
+    } else 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 == '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+1;
+	} else {
+	    if (GetEntryIndex(interp, entryPtr, argv[3], &last) != TCL_OK) {
+		goto error;
+	    }
+	}
+	if ((last >= first) && (entryPtr->state == tkNormalUid)) {
+	    DeleteChars(entryPtr, first, last-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], "icursor", length) == 0)
+	    && (length >= 2)) {
+	if (argc != 3) {
+	    Tcl_AppendResult(interp, "wrong # args: should be \"",
+		    argv[0], " icursor pos\"",
+		    (char *) NULL);
+	    goto error;
+	}
+	if (GetEntryIndex(interp, entryPtr, argv[2], &entryPtr->insertPos)
+		!= TCL_OK) {
+	    goto error;
+	}
+	EventuallyRedraw(entryPtr);
+    } else if ((c == 'i') && (strncmp(argv[1], "index", length) == 0)
+	    && (length >= 3)) {
+	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 >= 3)) {
+	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], "selection", length) == 0)) {
+	int index, index2;
+
+	if (argc < 3) {
+	    Tcl_AppendResult(interp, "wrong # args: should be \"",
+		    argv[0], " select option ?index?\"", (char *) NULL);
+	    goto error;
+	}
+	length = strlen(argv[2]);
+	c = argv[2][0];
+	if ((c == 'c') && (strncmp(argv[2], "clear", length) == 0)) {
+	    if (argc != 3) {
+		Tcl_AppendResult(interp, "wrong # args: should be \"",
+			argv[0], " selection clear\"", (char *) NULL);
+		goto error;
+	    }
+	    if (entryPtr->selectFirst != -1) {
+		entryPtr->selectFirst = entryPtr->selectLast = -1;
+		EventuallyRedraw(entryPtr);
+	    }
+	    goto done;
+	} else if ((c == 'p') && (strncmp(argv[2], "present", length) == 0)) {
+	    if (argc != 3) {
+		Tcl_AppendResult(interp, "wrong # args: should be \"",
+			argv[0], " selection present\"", (char *) NULL);
+		goto error;
+	    }
+	    if (entryPtr->selectFirst == -1) {
+		interp->result = "0";
+	    } else {
+		interp->result = "1";
+	    }
+	    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], " selection adjust index\"",
+			(char *) NULL);
+		goto error;
+	    }
+	    if (entryPtr->selectFirst >= 0) {
+		int half1, half2;
+
+		half1 = (entryPtr->selectFirst + entryPtr->selectLast)/2;
+		half2 = (entryPtr->selectFirst + entryPtr->selectLast + 1)/2;
+		if (index < half1) {
+		    entryPtr->selectAnchor = entryPtr->selectLast;
+		} else if (index > half2) {
+		    entryPtr->selectAnchor = entryPtr->selectFirst;
+		} else {
+		    /*
+		     * We're at about the halfway point in the selection;
+		     * just keep the existing anchor.
+		     */
+		}
+	    }
+	    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], " selection from index\"",
+			(char *) NULL);
+		goto error;
+	    }
+	    entryPtr->selectAnchor = index;
+	} else if ((c == 'r') && (strncmp(argv[2], "range", length) == 0)) {
+	    if (argc != 5) {
+		Tcl_AppendResult(interp, "wrong # args: should be \"",
+			argv[0], " selection range start end\"",
+			(char *) NULL);
+		goto error;
+	    }
+	    if (GetEntryIndex(interp, entryPtr, argv[4], &index2) != TCL_OK) {
+		goto error;
+	    }
+	    if (index >= index2) {
+		entryPtr->selectFirst = entryPtr->selectLast = -1;
+	    } else {
+		entryPtr->selectFirst = index;
+		entryPtr->selectLast = index2;
+	    }
+	    if (!(entryPtr->flags & GOT_SELECTION)
+		    && (entryPtr->exportSelection)) {
+		Tk_OwnSelection(entryPtr->tkwin, XA_PRIMARY, 
+			EntryLostSelection, (ClientData) entryPtr);
+		entryPtr->flags |= GOT_SELECTION;
+	    }
+	    EventuallyRedraw(entryPtr);
+	} else if ((c == 't') && (strncmp(argv[2], "to", length) == 0)) {
+	    if (argc != 4) {
+		Tcl_AppendResult(interp, "wrong # args: should be \"",
+			argv[0], " selection to index\"",
+			(char *) NULL);
+		goto error;
+	    }
+	    EntrySelectTo(entryPtr, index);
+	} else {
+	    Tcl_AppendResult(interp, "bad selection option \"", argv[2],
+		    "\": must be adjust, clear, from, present, range, or to",
+		    (char *) NULL);
+	    goto error;
+	}
+    } else if ((c == 'x') && (strncmp(argv[1], "xview", length) == 0)) {
+	int index, type, count, charsPerPage;
+	double fraction, first, last;
+
+	if (argc == 2) {
+	    EntryVisibleRange(entryPtr, &first, &last);
+	    sprintf(interp->result, "%g %g", first, last);
+	    goto done;
+	} else if (argc == 3) {
+	    if (GetEntryIndex(interp, entryPtr, argv[2], &index) != TCL_OK) {
+		goto error;
+	    }
+	} else {
+	    type = Tk_GetScrollInfo(interp, argc, argv, &fraction, &count);
+	    index = entryPtr->leftIndex;
+	    switch (type) {
+		case TK_SCROLL_ERROR:
+		    goto error;
+		case TK_SCROLL_MOVETO:
+		    index = (int) ((fraction * entryPtr->numChars) + 0.5);
+		    break;
+		case TK_SCROLL_PAGES:
+		    charsPerPage = ((Tk_Width(entryPtr->tkwin)
+			    - 2*entryPtr->inset) / entryPtr->avgWidth) - 2;
+		    if (charsPerPage < 1) {
+			charsPerPage = 1;
+		    }
+		    index += charsPerPage*count;
+		    break;
+		case TK_SCROLL_UNITS:
+		    index += count;
+		    break;
+	    }
+	}
+	if (index >= entryPtr->numChars) {
+	    index = entryPtr->numChars-1;
+	}
+	if (index < 0) {
+	    index = 0;
+	}
+	entryPtr->leftIndex = index;
+	entryPtr->flags |= UPDATE_SCROLLBAR;
+	EntryComputeGeometry(entryPtr);
+	EventuallyRedraw(entryPtr);
+    } else {
+	Tcl_AppendResult(interp, "bad option \"", argv[1],
+		"\": must be bbox, cget, configure, delete, get, ",
+		"icursor, index, insert, scan, selection, or xview",
+		(char *) NULL);
+	goto error;
+    }
+    done:
+    Tcl_Release((ClientData) entryPtr);
+    return result;
+
+    error:
+    Tcl_Release((ClientData) entryPtr);
+    return TCL_ERROR;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * DestroyEntry --
+ *
+ *	This procedure is invoked by Tcl_EventuallyFree or Tcl_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(memPtr)
+    char *memPtr;		/* Info about entry widget. */
+{
+    register Entry *entryPtr = (Entry *) memPtr;
+
+    /*
+     * Free up all the stuff that requires special handling, then
+     * let Tk_FreeOptions handle all the standard option-related
+     * stuff.
+     */
+
+    ckfree(entryPtr->string);
+    if (entryPtr->textVarName != NULL) {
+	Tcl_UntraceVar(entryPtr->interp, entryPtr->textVarName,
+		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+		EntryTextVarProc, (ClientData) entryPtr);
+    }
+    if (entryPtr->textGC != None) {
+	Tk_FreeGC(entryPtr->display, entryPtr->textGC);
+    }
+    if (entryPtr->selTextGC != None) {
+	Tk_FreeGC(entryPtr->display, entryPtr->selTextGC);
+    }
+    Tcl_DeleteTimerHandler(entryPtr->insertBlinkHandler);
+    if (entryPtr->displayString != NULL) {
+	ckfree(entryPtr->displayString);
+    }
+    Tk_FreeTextLayout(entryPtr->textLayout);
+    Tk_FreeOptions(configSpecs, (char *) entryPtr, entryPtr->display, 0);
+    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. */
+{
+    int 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) {
+	    EntryValueChanged(entryPtr);
+	} 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);
+
+    if (entryPtr->insertWidth <= 0) {
+	entryPtr->insertWidth = 2;
+    }
+    if (entryPtr->insertBorderWidth > entryPtr->insertWidth/2) {
+	entryPtr->insertBorderWidth = entryPtr->insertWidth/2;
+    }
+
+    /*
+     * Restart the cursor timing sequence in case the on-time or off-time
+     * just changed.
+     */
+
+    if (entryPtr->flags & GOT_FOCUS) {
+	EntryFocusProc(entryPtr, 1);
+    }
+
+    /*
+     * Claim the selection if we've suddenly started exporting it.
+     */
+
+    if (entryPtr->exportSelection && (!oldExport)
+	    && (entryPtr->selectFirst != -1)
+	    && !(entryPtr->flags & GOT_SELECTION)) {
+	Tk_OwnSelection(entryPtr->tkwin, XA_PRIMARY, EntryLostSelection,
+		(ClientData) entryPtr);
+	entryPtr->flags |= GOT_SELECTION;
+    }
+
+    /*
+     * Recompute the window's geometry and arrange for it to be
+     * redisplayed.
+     */
+
+    Tk_SetInternalBorder(entryPtr->tkwin,
+	    entryPtr->borderWidth + entryPtr->highlightWidth);
+    if (entryPtr->highlightWidth <= 0) {
+	entryPtr->highlightWidth = 0;
+    }
+    entryPtr->inset = entryPtr->highlightWidth + entryPtr->borderWidth + XPAD;
+
+    EntryWorldChanged((ClientData) entryPtr);
+    return TCL_OK;
+}
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * EntryWorldChanged --
+ *
+ *      This procedure is called when the world has changed in some
+ *      way and the widget needs to recompute all its graphics contexts
+ *	and determine its new geometry.
+ *
+ * Results:
+ *      None.
+ *
+ * Side effects:
+ *      Entry will be relayed out and redisplayed.
+ *
+ *---------------------------------------------------------------------------
+ */
+ 
+static void
+EntryWorldChanged(instanceData)
+    ClientData instanceData;	/* Information about widget. */
+{
+    XGCValues gcValues;
+    GC gc;
+    unsigned long mask;
+    Entry *entryPtr;
+
+    entryPtr = (Entry *) instanceData;
+
+    entryPtr->avgWidth = Tk_TextWidth(entryPtr->tkfont, "0", 1);
+    if (entryPtr->avgWidth == 0) {
+	entryPtr->avgWidth = 1;
+    }
+
+    gcValues.foreground = entryPtr->fgColorPtr->pixel;
+    gcValues.font = Tk_FontId(entryPtr->tkfont);
+    gcValues.graphics_exposures = False;
+    mask = GCForeground | GCFont | GCGraphicsExposures;
+    gc = Tk_GetGC(entryPtr->tkwin, mask, &gcValues);
+    if (entryPtr->textGC != None) {
+	Tk_FreeGC(entryPtr->display, entryPtr->textGC);
+    }
+    entryPtr->textGC = gc;
+
+    gcValues.foreground = entryPtr->selFgColorPtr->pixel;
+    gcValues.font = Tk_FontId(entryPtr->tkfont);
+    mask = GCForeground | GCFont;
+    gc = Tk_GetGC(entryPtr->tkwin, mask, &gcValues);
+    if (entryPtr->selTextGC != None) {
+	Tk_FreeGC(entryPtr->display, entryPtr->selTextGC);
+    }
+    entryPtr->selTextGC = gc;
+
+    /*
+     * Recompute the window's geometry and arrange for it to be
+     * redisplayed.
+     */
+
+    EntryComputeGeometry(entryPtr);
+    entryPtr->flags |= UPDATE_SCROLLBAR;
+    EventuallyRedraw(entryPtr);
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * 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 baseY, selStartX, selEndX, cursorX, x, w;
+    int xBound;
+    Tk_FontMetrics fm;
+    Pixmap pixmap;
+    int showSelection;
+
+    entryPtr->flags &= ~REDRAW_PENDING;
+    if ((entryPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
+	return;
+    }
+
+    Tk_GetFontMetrics(entryPtr->tkfont, &fm);
+
+    /*
+     * Update the scrollbar if that's needed.
+     */
+
+    if (entryPtr->flags & UPDATE_SCROLLBAR) {
+	entryPtr->flags &= ~UPDATE_SCROLLBAR;
+	EntryUpdateScrollbar(entryPtr);
+    }
+
+    /*
+     * 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 = Tk_GetPixmap(entryPtr->display, Tk_WindowId(tkwin),
+	    Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin));
+
+    /*
+     * Compute x-coordinate of the pixel just after last visible
+     * one, plus vertical position of baseline of text.
+     */
+
+    xBound = Tk_Width(tkwin) - entryPtr->inset;
+    baseY = (Tk_Height(tkwin) + fm.ascent - fm.descent) / 2;
+
+    /*
+     * On Windows and Mac, we need to hide the selection whenever we
+     * don't have the focus.
+     */
+
+#ifdef ALWAYS_SHOW_SELECTION
+    showSelection = 1;
+#else
+    showSelection = (entryPtr->flags & GOT_FOCUS);
+#endif
+
+    /*
+     * Draw the background in three layers.  From bottom to top the
+     * layers are:  normal background, selection background, and
+     * insertion cursor background.
+     */
+
+    Tk_Fill3DRectangle(tkwin, pixmap, entryPtr->normalBorder,
+	    0, 0, Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
+    if (showSelection && (entryPtr->selectLast > entryPtr->leftIndex)) {
+	if (entryPtr->selectFirst <= entryPtr->leftIndex) {
+	    selStartX = entryPtr->leftX;
+	} else {
+	    Tk_CharBbox(entryPtr->textLayout, entryPtr->selectFirst,
+		    &x, NULL, NULL, NULL);
+	    selStartX = x + entryPtr->layoutX;
+	}
+	if ((selStartX - entryPtr->selBorderWidth) < xBound) {
+	    Tk_CharBbox(entryPtr->textLayout, entryPtr->selectLast - 1,
+		    &x, NULL, &w, NULL);
+	    selEndX = x + w + entryPtr->layoutX;
+	    Tk_Fill3DRectangle(tkwin, pixmap, entryPtr->selBorder,
+		    selStartX - entryPtr->selBorderWidth,
+		    baseY - fm.ascent - entryPtr->selBorderWidth,
+		    (selEndX - selStartX) + 2*entryPtr->selBorderWidth,
+		    (fm.ascent + fm.descent) + 2*entryPtr->selBorderWidth,
+		    entryPtr->selBorderWidth, TK_RELIEF_RAISED);
+	} 
+    }
+
+    /*
+     * Draw a special background for the insertion cursor, overriding
+     * even the selection background.  As a special hack to keep the
+     * cursor visible when the insertion cursor color is the same as
+     * the color for selected text (e.g., 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->insertPos >= entryPtr->leftIndex)
+	    && (entryPtr->state == tkNormalUid)
+	    && (entryPtr->flags & GOT_FOCUS)) {
+	if (entryPtr->insertPos == 0) {
+	    cursorX = 0;
+	} else if (entryPtr->insertPos >= entryPtr->numChars) {
+	    Tk_CharBbox(entryPtr->textLayout, entryPtr->numChars - 1,
+		    &x, NULL, &w, NULL);
+	    cursorX = x + w;
+	} else {
+	    Tk_CharBbox(entryPtr->textLayout, entryPtr->insertPos,
+		    &x, NULL, NULL, NULL);
+	    cursorX = x;
+	}
+	cursorX += entryPtr->layoutX;
+	cursorX -= (entryPtr->insertWidth)/2;
+	if (cursorX < xBound) {
+	    if (entryPtr->flags & CURSOR_ON) {
+		Tk_Fill3DRectangle(tkwin, pixmap, entryPtr->insertBorder,
+			cursorX, baseY - fm.ascent,
+			entryPtr->insertWidth, fm.ascent + fm.descent, 
+			entryPtr->insertBorderWidth, TK_RELIEF_RAISED);
+	    } else if (entryPtr->insertBorder == entryPtr->selBorder) {
+		Tk_Fill3DRectangle(tkwin, pixmap, entryPtr->normalBorder,
+			cursorX, baseY - fm.ascent,
+			entryPtr->insertWidth, fm.ascent + fm.descent,
+			0, TK_RELIEF_FLAT);
+	    }
+	}
+    }
+
+    /*
+     * Draw the text in two pieces:  first the unselected portion, then the
+     * selected portion on top of it.
+     */
+
+    Tk_DrawTextLayout(entryPtr->display, pixmap, entryPtr->textGC,
+	    entryPtr->textLayout, entryPtr->layoutX, entryPtr->layoutY,
+	    entryPtr->leftIndex, entryPtr->numChars);
+
+    if (showSelection && (entryPtr->selTextGC != entryPtr->textGC) &&
+	    (entryPtr->selectFirst < entryPtr->selectLast)) {
+	int first;
+
+	if (entryPtr->selectFirst - entryPtr->leftIndex < 0) {
+	    first = entryPtr->leftIndex;
+	} else {
+	    first = entryPtr->selectFirst;
+	}
+	Tk_DrawTextLayout(entryPtr->display, pixmap, entryPtr->selTextGC,
+		entryPtr->textLayout, entryPtr->layoutX, entryPtr->layoutY,
+		first, entryPtr->selectLast);
+    }
+
+    /*
+     * Draw the border and focus highlight last, so they will overwrite
+     * any text that extends past the viewable part of the window.
+     */
+
+    if (entryPtr->relief != TK_RELIEF_FLAT) {
+	Tk_Draw3DRectangle(tkwin, pixmap, entryPtr->normalBorder,
+		entryPtr->highlightWidth, entryPtr->highlightWidth,
+		Tk_Width(tkwin) - 2*entryPtr->highlightWidth,
+		Tk_Height(tkwin) - 2*entryPtr->highlightWidth,
+		entryPtr->borderWidth, entryPtr->relief);
+    }
+    if (entryPtr->highlightWidth != 0) {
+	GC gc;
+
+	if (entryPtr->flags & GOT_FOCUS) {
+	    gc = Tk_GCForColor(entryPtr->highlightColorPtr, pixmap);
+	} else {
+	    gc = Tk_GCForColor(entryPtr->highlightBgColorPtr, pixmap);
+	}
+	Tk_DrawFocusHighlight(tkwin, gc, entryPtr->highlightWidth, pixmap);
+    }
+
+    /*
+     * Everything's been redisplayed;  now copy the pixmap onto the screen
+     * and free up the pixmap.
+     */
+
+    XCopyArea(entryPtr->display, pixmap, Tk_WindowId(tkwin), entryPtr->textGC,
+	    0, 0, (unsigned) Tk_Width(tkwin), (unsigned) Tk_Height(tkwin),
+	    0, 0);
+    Tk_FreePixmap(entryPtr->display, pixmap);
+    entryPtr->flags &= ~BORDER_NEEDED;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * EntryComputeGeometry --
+ *
+ *	This procedure is invoked to recompute information about where
+ *	in its window an entry's string will be displayed.  It also
+ *	computes the requested size for the window.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	The leftX and tabOrigin fields are recomputed for entryPtr,
+ *	and leftIndex may be adjusted.  Tk_GeometryRequest is called
+ *	to register the desired dimensions for the window.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+EntryComputeGeometry(entryPtr)
+    Entry *entryPtr;			/* Widget record for entry. */
+{
+    int totalLength, overflow, maxOffScreen, rightX;
+    int height, width, i;
+    Tk_FontMetrics fm;
+    char *p, *displayString;
+
+    /*
+     * If we're displaying a special character instead of the value of
+     * the entry, recompute the displayString.
+     */
+
+    if (entryPtr->displayString != NULL) {
+	ckfree(entryPtr->displayString);
+	entryPtr->displayString = NULL;
+    }
+    if (entryPtr->showChar != NULL) {
+	entryPtr->displayString = (char *) ckalloc((unsigned)
+		(entryPtr->numChars + 1));
+	for (p = entryPtr->displayString, i = entryPtr->numChars; i > 0;
+		i--, p++) {
+	    *p = entryPtr->showChar[0];
+	}
+	*p = 0;
+	displayString = entryPtr->displayString;
+    } else {
+	displayString = entryPtr->string;
+    }
+    Tk_FreeTextLayout(entryPtr->textLayout);
+    entryPtr->textLayout = Tk_ComputeTextLayout(entryPtr->tkfont,
+	    displayString, entryPtr->numChars, 0, entryPtr->justify,
+	    TK_IGNORE_NEWLINES, &totalLength, &height);
+
+    entryPtr->layoutY = (Tk_Height(entryPtr->tkwin) - height) / 2;
+
+    /*
+     * Recompute where the leftmost character on the display will
+     * be drawn (entryPtr->leftX) and adjust leftIndex if necessary
+     * so that we don't let characters hang off the edge of the
+     * window unless the entire window is full.
+     */
+
+    overflow = totalLength - (Tk_Width(entryPtr->tkwin) - 2*entryPtr->inset);
+    if (overflow <= 0) {
+	entryPtr->leftIndex = 0;
+	if (entryPtr->justify == TK_JUSTIFY_LEFT) {
+	    entryPtr->leftX = entryPtr->inset;
+	} else if (entryPtr->justify == TK_JUSTIFY_RIGHT) {
+	    entryPtr->leftX = Tk_Width(entryPtr->tkwin) - entryPtr->inset
+		    - totalLength;
+	} else {
+	    entryPtr->leftX = (Tk_Width(entryPtr->tkwin) - totalLength)/2;
+	}
+	entryPtr->layoutX = entryPtr->leftX;
+    } else {
+	/*
+	 * The whole string can't fit in the window.  Compute the
+	 * maximum number of characters that may be off-screen to
+	 * the left without leaving empty space on the right of the
+	 * window, then don't let leftIndex be any greater than that.
+	 */
+
+	maxOffScreen = Tk_PointToChar(entryPtr->textLayout, overflow, 0);
+	Tk_CharBbox(entryPtr->textLayout, maxOffScreen,
+		&rightX, NULL, NULL, NULL);
+	if (rightX < overflow) {
+	    maxOffScreen += 1;
+	}
+	if (entryPtr->leftIndex > maxOffScreen) {
+	    entryPtr->leftIndex = maxOffScreen;
+	}
+	Tk_CharBbox(entryPtr->textLayout, entryPtr->leftIndex,
+		&rightX, NULL, NULL, NULL);
+	entryPtr->leftX = entryPtr->inset;
+	entryPtr->layoutX = entryPtr->leftX - rightX;
+    }
+
+    Tk_GetFontMetrics(entryPtr->tkfont, &fm);
+    height = fm.linespace + 2*entryPtr->inset + 2*(YPAD-XPAD);
+    if (entryPtr->prefWidth > 0) {
+	width = entryPtr->prefWidth*entryPtr->avgWidth + 2*entryPtr->inset;
+    } else {
+	if (totalLength == 0) {
+	    width = entryPtr->avgWidth + 2*entryPtr->inset;
+	} else {
+	    width = totalLength + 2*entryPtr->inset;
+	}
+    }
+    Tk_GeometryRequest(entryPtr->tkwin, width, height);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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, (size_t) 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).  When updating the selection
+     * end-points, don't include the new text in the selection unless
+     * it was completely surrounded by the selection.
+     */
+
+    if (entryPtr->selectFirst >= index) {
+	entryPtr->selectFirst += length;
+    }
+    if (entryPtr->selectLast > index) {
+	entryPtr->selectLast += length;
+    }
+    if ((entryPtr->selectAnchor > index) || (entryPtr->selectFirst >= index)) {
+	entryPtr->selectAnchor += length;
+    }
+    if (entryPtr->leftIndex > index) {
+	entryPtr->leftIndex += length;
+    }
+    if (entryPtr->insertPos >= index) {
+	entryPtr->insertPos += length;
+    }
+    EntryValueChanged(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, (size_t) 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;
+	}
+    }
+    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->insertPos >= index) {
+	if (entryPtr->insertPos >= (index+count)) {
+	    entryPtr->insertPos -= count;
+	} else {
+	    entryPtr->insertPos = index;
+	}
+    }
+    EntryValueChanged(entryPtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * EntryValueChanged --
+ *
+ *	This procedure is invoked when characters are inserted into
+ *	an entry or deleted from it.  It updates the entry's associated
+ *	variable, if there is one, and does other bookkeeping such
+ *	as arranging for redisplay.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+EntryValueChanged(entryPtr)
+    Entry *entryPtr;		/* Entry whose value just changed. */
+{
+    char *newValue;
+
+    if (entryPtr->textVarName == NULL) {
+	newValue = NULL;
+    } else {
+	newValue = Tcl_SetVar(entryPtr->interp, entryPtr->textVarName,
+		entryPtr->string, TCL_GLOBAL_ONLY);
+    }
+
+    if ((newValue != NULL) && (strcmp(newValue, entryPtr->string) != 0)) {
+	/*
+	 * The value of the variable is different than what we asked for.
+	 * This means that a trace on the variable modified it.  In this
+	 * case our trace procedure wasn't invoked since the modification
+	 * came while a trace was already active on the variable.  So,
+	 * update our value to reflect the variable's latest value.
+	 */
+
+	EntrySetValue(entryPtr, newValue);
+    } else {
+	/*
+	 * Arrange for redisplay.
+	 */
+
+	entryPtr->flags |= UPDATE_SCROLLBAR;
+	EntryComputeGeometry(entryPtr);
+	EventuallyRedraw(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.  The selection,
+ *	insertion point, and view may have to be adjusted to keep them
+ *	within the bounds of the new string.  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);
+    if (entryPtr->selectFirst != -1) {
+	if (entryPtr->selectFirst >= entryPtr->numChars) {
+	    entryPtr->selectFirst = entryPtr->selectLast = -1;
+	} else if (entryPtr->selectLast > entryPtr->numChars) {
+	    entryPtr->selectLast = entryPtr->numChars;
+	}
+    }
+    if (entryPtr->leftIndex >= entryPtr->numChars) {
+	entryPtr->leftIndex = entryPtr->numChars-1;
+	if (entryPtr->leftIndex < 0) {
+	    entryPtr->leftIndex = 0;
+	}
+    }
+    if (entryPtr->insertPos > entryPtr->numChars) {
+	entryPtr->insertPos = entryPtr->numChars;
+    }
+
+    entryPtr->flags |= UPDATE_SCROLLBAR;
+    EntryComputeGeometry(entryPtr);
+    EventuallyRedraw(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) {
+	if (entryPtr->tkwin != NULL) {
+	    entryPtr->tkwin = NULL;
+            Tcl_DeleteCommandFromToken(entryPtr->interp, entryPtr->widgetCmd);
+	}
+	if (entryPtr->flags & REDRAW_PENDING) {
+	    Tcl_CancelIdleCall(DisplayEntry, (ClientData) entryPtr);
+	}
+	Tcl_EventuallyFree((ClientData) entryPtr, DestroyEntry);
+    } else if (eventPtr->type == ConfigureNotify) {
+	Tcl_Preserve((ClientData) entryPtr);
+	entryPtr->flags |= UPDATE_SCROLLBAR;
+	EntryComputeGeometry(entryPtr);
+	EventuallyRedraw(entryPtr);
+	Tcl_Release((ClientData) entryPtr);
+    } else if (eventPtr->type == FocusIn) {
+	if (eventPtr->xfocus.detail != NotifyInferior) {
+	    EntryFocusProc(entryPtr, 1);
+	}
+    } else if (eventPtr->type == FocusOut) {
+	if (eventPtr->xfocus.detail != NotifyInferior) {
+	    EntryFocusProc(entryPtr, 0);
+	}
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * EntryCmdDeletedProc --
+ *
+ *	This procedure is invoked when a widget command is deleted.  If
+ *	the widget isn't already in the process of being destroyed,
+ *	this command destroys it.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	The widget is destroyed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+EntryCmdDeletedProc(clientData)
+    ClientData clientData;	/* Pointer to widget record for widget. */
+{
+    Entry *entryPtr = (Entry *) clientData;
+    Tk_Window tkwin = entryPtr->tkwin;
+
+    /*
+     * This procedure could be invoked either because the window was
+     * destroyed and the command was then deleted (in which case tkwin
+     * is NULL) or because the command was deleted, and then this procedure
+     * destroys the widget.
+     */
+
+    if (tkwin != NULL) {
+	entryPtr->tkwin = NULL;
+	Tk_DestroyWindow(tkwin);
+    }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * 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. */
+{
+    size_t length;
+
+    length = strlen(string);
+
+    if (string[0] == 'a') {
+	if (strncmp(string, "anchor", length) == 0) {
+	    *indexPtr = entryPtr->selectAnchor;
+	} 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] == 'e') {
+	if (strncmp(string, "end", length) == 0) {
+	    *indexPtr = entryPtr->numChars;
+	} else {
+	    goto badIndex;
+	}
+    } else if (string[0] == 'i') {
+	if (strncmp(string, "insert", length) == 0) {
+	    *indexPtr = entryPtr->insertPos;
+	} 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, roundUp;
+
+	if (Tcl_GetInt(interp, string+1, &x) != TCL_OK) {
+	    goto badIndex;
+	}
+	if (x < entryPtr->inset) {
+	    x = entryPtr->inset;
+	}
+	roundUp = 0;
+	if (x >= (Tk_Width(entryPtr->tkwin) - entryPtr->inset)) {
+	    x = Tk_Width(entryPtr->tkwin) - entryPtr->inset - 1;
+	    roundUp = 1;
+	}
+	*indexPtr = Tk_PointToChar(entryPtr->textLayout,
+		x - entryPtr->layoutX, 0);
+
+	/*
+	 * Special trick:  if the x-position was off-screen to the right,
+	 * round the index up to refer to the character just after the
+	 * last visible one on the screen.  This is needed to enable the
+	 * last character to be selected, for example.
+	 */
+
+	if (roundUp && (*indexPtr < entryPtr->numChars)) {
+	    *indexPtr += 1;
+	}
+    } 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;
+	entryPtr->flags |= UPDATE_SCROLLBAR;
+	EntryComputeGeometry(entryPtr);
+	EventuallyRedraw(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->flags & GOT_SELECTION) && (entryPtr->exportSelection)) {
+	Tk_OwnSelection(entryPtr->tkwin, XA_PRIMARY, EntryLostSelection,
+		(ClientData) entryPtr);
+	entryPtr->flags |= GOT_SELECTION;
+    }
+
+    /*
+     * Pick new starting and ending points for the selection.
+     */
+
+    if (entryPtr->selectAnchor > entryPtr->numChars) {
+	entryPtr->selectAnchor = entryPtr->numChars;
+    }
+    if (entryPtr->selectAnchor <= index) {
+	newFirst = entryPtr->selectAnchor;
+	newLast = index;
+    } else {
+	newFirst = index;
+	newLast = entryPtr->selectAnchor;
+	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;
+    char *displayString;
+
+    if ((entryPtr->selectFirst < 0) || !(entryPtr->exportSelection)) {
+	return -1;
+    }
+    count = entryPtr->selectLast - entryPtr->selectFirst - offset;
+    if (count > maxBytes) {
+	count = maxBytes;
+    }
+    if (count <= 0) {
+	return 0;
+    }
+    if (entryPtr->displayString == NULL) {
+	displayString = entryPtr->string;
+    } else {
+	displayString = entryPtr->displayString;
+    }
+    strncpy(buffer, displayString + entryPtr->selectFirst + offset,
+	    (size_t) 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;
+
+    entryPtr->flags &= ~GOT_SELECTION;
+
+    /*
+     * On Windows and Mac systems, we want to remember the selection
+     * for the next time the focus enters the window.  On Unix, we need
+     * to clear the selection since it is always visible.
+     */
+
+#ifdef ALWAYS_SHOW_SELECTION
+    if ((entryPtr->selectFirst != -1) && entryPtr->exportSelection) {
+	entryPtr->selectFirst = -1;
+	entryPtr->selectLast = -1;
+	EventuallyRedraw(entryPtr);
+    }
+#endif
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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;
+	Tcl_DoWhenIdle(DisplayEntry, (ClientData) entryPtr);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * EntryVisibleRange --
+ *
+ *	Return information about the range of the entry that is
+ *	currently visible.
+ *
+ * Results:
+ *	*firstPtr and *lastPtr are modified to hold fractions between
+ *	0 and 1 identifying the range of characters visible in the
+ *	entry.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+EntryVisibleRange(entryPtr, firstPtr, lastPtr)
+    Entry *entryPtr;			/* Information about widget. */
+    double *firstPtr;			/* Return position of first visible
+					 * character in widget. */
+    double *lastPtr;			/* Return position of char just after
+					 * last visible one. */
+{
+    int charsInWindow;
+
+    if (entryPtr->numChars == 0) {
+	*firstPtr = 0.0;
+	*lastPtr = 1.0;
+    } else {
+	charsInWindow = Tk_PointToChar(entryPtr->textLayout,
+		Tk_Width(entryPtr->tkwin) - entryPtr->inset
+			- entryPtr->layoutX - 1, 0) + 1;
+	if (charsInWindow > entryPtr->numChars) {
+	    /*
+	     * If all chars were visible, then charsInWindow will be
+	     * the index just after the last char that was visible.
+	     */
+	     
+	    charsInWindow = entryPtr->numChars;
+	}
+	charsInWindow -= entryPtr->leftIndex;
+	if (charsInWindow == 0) {
+	    charsInWindow = 1;
+	}
+	*firstPtr = ((double) entryPtr->leftIndex)/entryPtr->numChars;
+	*lastPtr = ((double) (entryPtr->leftIndex + charsInWindow))
+		/entryPtr->numChars;
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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 procedure 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)
+    Entry *entryPtr;			/* Information about widget. */
+{
+    char args[100];
+    int code;
+    double first, last;
+    Tcl_Interp *interp;
+
+    if (entryPtr->scrollCmd == NULL) {
+	return;
+    }
+
+    interp = entryPtr->interp;
+    Tcl_Preserve((ClientData) interp);
+    EntryVisibleRange(entryPtr, &first, &last);
+    sprintf(args, " %g %g", first, last);
+    code = Tcl_VarEval(interp, entryPtr->scrollCmd, args, (char *) NULL);
+    if (code != TCL_OK) {
+	Tcl_AddErrorInfo(interp,
+		"\n    (horizontal scrolling command executed by entry)");
+	Tcl_BackgroundError(interp);
+    }
+    Tcl_SetResult(interp, (char *) NULL, TCL_STATIC);
+    Tcl_Release((ClientData) interp);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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->insertOffTime == 0)) {
+	return;
+    }
+    if (entryPtr->flags & CURSOR_ON) {
+	entryPtr->flags &= ~CURSOR_ON;
+	entryPtr->insertBlinkHandler = Tcl_CreateTimerHandler(
+		entryPtr->insertOffTime, EntryBlinkProc, (ClientData) entryPtr);
+    } else {
+	entryPtr->flags |= CURSOR_ON;
+	entryPtr->insertBlinkHandler = Tcl_CreateTimerHandler(
+		entryPtr->insertOnTime, 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(entryPtr, gotFocus)
+    register Entry *entryPtr;	/* Entry that got or lost focus. */
+    int gotFocus;		/* 1 means window is getting focus, 0 means
+				 * it's losing it. */
+{
+    Tcl_DeleteTimerHandler(entryPtr->insertBlinkHandler);
+    if (gotFocus) {
+	entryPtr->flags |= GOT_FOCUS | CURSOR_ON;
+	if (entryPtr->insertOffTime != 0) {
+	    entryPtr->insertBlinkHandler = Tcl_CreateTimerHandler(
+		    entryPtr->insertOnTime, EntryBlinkProc,
+		    (ClientData) entryPtr);
+	}
+    } else {
+	entryPtr->flags &= ~(GOT_FOCUS | CURSOR_ON);
+	entryPtr->insertBlinkHandler = (Tcl_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;		/* Not used. */
+    char *name2;		/* Not used. */
+    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_SetVar(interp, entryPtr->textVarName, entryPtr->string,
+		    TCL_GLOBAL_ONLY);
+	    Tcl_TraceVar(interp, entryPtr->textVarName,
+		    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_GetVar(interp, entryPtr->textVarName, TCL_GLOBAL_ONLY);
+    if (value == NULL) {
+	value = "";
+    }
+    if (strcmp(value, entryPtr->string) != 0) {
+	EntrySetValue(entryPtr, value);
+    }
+    return (char *) NULL;
+}