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authorrjohnson <rjohnson>1998-04-01 09:51:44 (GMT)
committerrjohnson <rjohnson>1998-04-01 09:51:44 (GMT)
commit066ea7fd88d49cb456f74da71dbe875e4fc0aabb (patch)
tree8fb30cb152c4dc191be47fa043d2e6f5ea38c7ba /generic/tkEntry.c
parent13242623d2ff3ea02ab6a62bfb48a7dbb5c27e22 (diff)
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Initial revision
Diffstat (limited to 'generic/tkEntry.c')
-rw-r--r--generic/tkEntry.c2313
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;
+}