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ckEntry.c
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/*
* ckEntry.c --
*
* This module implements entry widgets for the
* 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) 1994-1995 Sun Microsystems, Inc.
* Copyright (c) 1995 Christian Werner
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include <stdio.h>
#include "ckPort.h"
#include "ck.h"
#include "default.h"
/*
* A data structure of the following type is kept for each entry
* widget managed by this file:
*/
typedef struct {
CkWindow *winPtr; /* Window that embodies the entry. NULL
* means that the window has been destroyed
* but the data structures haven't yet been
* cleaned up.*/
Tcl_Interp *interp; /* Interpreter associated with entry. */
Tcl_Command widgetCmd; /* Token for entry's widget command. */
#if CK_USE_UTF
int numBytes; /* Number of bytes in string. */
#endif
int numChars; /* Number of non-NULL characters in
* string (may be 0). */
char *string; /* Pointer to storage for string;
* NULL-terminated; malloc-ed. */
char *textVarName; /* Name of variable (malloc'ed) or NULL.
* If non-NULL, entry's string tracks the
* contents of this variable and vice versa. */
Ck_Uid state; /* Normal or disabled. Entry is read-only
* when disabled. */
/*
* Information used when displaying widget:
*/
int normalBg; /* Normal background color. */
int normalFg; /* Normal foreground color. */
int normalAttr; /* Normal video attributes. */
int selBg; /* Select background color. */
int selFg; /* Select foreground color. */
int selAttr; /* Select video attributes. */
Ck_Justify justify; /* Justification to use for text within
* window. */
int leftX; /* X position at which leftIndex is drawn
* (varies depending on justify). */
int leftIndex; /* Index of left-most character visible in
* window. */
int tabOrigin; /* Origin for tabs (left edge of string[0]). */
int insertPos; /* Index of character before which next
* typed character will be inserted. */
char *showChar; /* Value of -show option. If non-NULL, first
* character is used for displaying all
* characters in entry. Malloc'ed. */
char *displayString; /* If non-NULL, points to string with same
* length as string but whose characters
* are all equal to showChar. Malloc'ed. */
int prefWidth; /* Preferred width for window. */
/*
* 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). */
/*
* Miscellaneous information:
*/
char *takeFocus; /* Value of -takefocus option; not used in
* the C code, but used by keyboard traversal
* scripts. Malloc'ed, but may be NULL. */
char *scrollCmd; /* Command prefix for communicating with
* scrollbar(s). Malloc'ed. NULL means
* no command to issue. */
int flags; /* Miscellaneous flags; see below for
* definitions. */
} Entry;
/*
* Assigned bits of "flags" fields of Entry structures, and what those
* bits mean:
*
* REDRAW_PENDING: Non-zero means a DoWhenIdle handler has
* already been queued to redisplay the entry.
* GOT_FOCUS: Non-zero means this window has the input
* focus.
* UPDATE_SCROLLBAR: Non-zero means scrollbar should be updated
* during next redisplay operation.
*/
#define REDRAW_PENDING 1
#define GOT_FOCUS 2
#define UPDATE_SCROLLBAR 4
/*
* Information used for argv parsing.
*/
static Ck_ConfigSpec configSpecs[] = {
{CK_CONFIG_ATTR, "-attributes", "attributes", "Attributes",
DEF_ENTRY_ATTR, Ck_Offset(Entry, normalAttr), 0},
{CK_CONFIG_COLOR, "-background", "background", "Background",
DEF_ENTRY_BG_COLOR, Ck_Offset(Entry, normalBg),
CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-background", "background", "Background",
DEF_ENTRY_BG_MONO, Ck_Offset(Entry, normalBg),
CK_CONFIG_MONO_ONLY},
{CK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
(char *) NULL, 0, 0},
{CK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
(char *) NULL, 0, 0},
{CK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
DEF_ENTRY_FG, Ck_Offset(Entry, normalFg), 0},
{CK_CONFIG_JUSTIFY, "-justify", "justify", "Justify",
DEF_ENTRY_JUSTIFY, Ck_Offset(Entry, justify), 0},
{CK_CONFIG_ATTR, "-selectattributes", "selectAttributes",
"SelectAttributes", DEF_ENTRY_SELECT_ATTR_COLOR,
Ck_Offset(Entry, selAttr), CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_ATTR, "-selectattributes", "selectAttributes",
"SelectAttributes", DEF_ENTRY_SELECT_ATTR_MONO,
Ck_Offset(Entry, selAttr), CK_CONFIG_MONO_ONLY},
{CK_CONFIG_COLOR, "-selectbackground", "selectBackground", "Foreground",
DEF_ENTRY_SELECT_BG_COLOR, Ck_Offset(Entry, selBg),
CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-selectbackground", "selectBackground", "Foreground",
DEF_ENTRY_SELECT_BG_MONO, Ck_Offset(Entry, selBg),
CK_CONFIG_MONO_ONLY},
{CK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background",
DEF_ENTRY_SELECT_FG_COLOR, Ck_Offset(Entry, selFg),
CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background",
DEF_ENTRY_SELECT_FG_MONO, Ck_Offset(Entry, selFg),
CK_CONFIG_MONO_ONLY},
{CK_CONFIG_STRING, "-show", "show", "Show",
DEF_ENTRY_SHOW, Ck_Offset(Entry, showChar), CK_CONFIG_NULL_OK},
{CK_CONFIG_UID, "-state", "state", "State",
DEF_ENTRY_STATE, Ck_Offset(Entry, state), 0},
{CK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_ENTRY_TAKE_FOCUS, Ck_Offset(Entry, takeFocus), CK_CONFIG_NULL_OK},
{CK_CONFIG_STRING, "-textvariable", "textVariable", "Variable",
DEF_ENTRY_TEXT_VARIABLE, Ck_Offset(Entry, textVarName),
CK_CONFIG_NULL_OK},
{CK_CONFIG_INT, "-width", "width", "Width",
DEF_ENTRY_WIDTH, Ck_Offset(Entry, prefWidth), 0},
{CK_CONFIG_STRING, "-xscrollcommand", "xScrollCommand", "ScrollCommand",
DEF_ENTRY_SCROLL_COMMAND, Ck_Offset(Entry, scrollCmd),
CK_CONFIG_NULL_OK},
{CK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
(char *) NULL, 0, 0}
};
/*
* Flags for GetEntryIndex procedure:
*/
#define ZERO_OK 1
#define LAST_PLUS_ONE_OK 2
/*
* Forward declarations for procedures defined later in this file:
*/
static int ConfigureEntry _ANSI_ARGS_((Tcl_Interp *interp,
Entry *entryPtr, int argc, char **argv,
int flags));
static void DeleteChars _ANSI_ARGS_((Entry *entryPtr, int index,
int count));
static void DestroyEntry _ANSI_ARGS_((ClientData clientData));
static void DisplayEntry _ANSI_ARGS_((ClientData clientData));
static void EntryComputeGeometry _ANSI_ARGS_((Entry *entryPtr));
static void EntryEventProc _ANSI_ARGS_((ClientData clientData,
CkEvent *eventPtr));
static void EntryFocusProc _ANSI_ARGS_ ((Entry *entryPtr,
int gotFocus));
static void EventuallyRedraw _ANSI_ARGS_((Entry *entryPtr));
static void EntryCmdDeletedProc _ANSI_ARGS_((
ClientData clientData));
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 EntryVisibleRange _ANSI_ARGS_((Entry *entryPtr,
double *firstPtr, double *lastPtr));
static int EntryWidgetCmd _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, char **argv));
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));
/*
*--------------------------------------------------------------
*
* Ck_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
Ck_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. */
{
CkWindow *mainPtr = (CkWindow *) clientData;
register Entry *entryPtr;
CkWindow *new;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " pathName ?options?\"", (char *) NULL);
return TCL_ERROR;
}
new = Ck_CreateWindowFromPath(interp, mainPtr, argv[1], 0);
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->winPtr = new;
entryPtr->interp = interp;
entryPtr->widgetCmd = Tcl_CreateCommand(interp,
entryPtr->winPtr->pathName, EntryWidgetCmd,
(ClientData) entryPtr, EntryCmdDeletedProc);
#if CK_USE_UTF
entryPtr->numBytes = 0;
#endif
entryPtr->numChars = 0;
entryPtr->string = (char *) ckalloc(1);
entryPtr->string[0] = '\0';
entryPtr->textVarName = NULL;
entryPtr->state = ckNormalUid;
entryPtr->normalBg = 0;
entryPtr->normalFg = 0;
entryPtr->normalAttr = 0;
entryPtr->selBg = 0;
entryPtr->selFg = 0;
entryPtr->selAttr = 0;
entryPtr->justify = CK_JUSTIFY_LEFT;
entryPtr->prefWidth = 0;
entryPtr->leftIndex = 0;
entryPtr->tabOrigin = 0;
entryPtr->insertPos = 0;
entryPtr->showChar = NULL;
entryPtr->displayString = NULL;
entryPtr->prefWidth = 1;
entryPtr->selectFirst = -1;
entryPtr->selectLast = -1;
entryPtr->selectAnchor = 0;
entryPtr->takeFocus = NULL;
entryPtr->scrollCmd = NULL;
entryPtr->flags = 0;
Ck_SetClass(entryPtr->winPtr, "Entry");
Ck_CreateEventHandler(entryPtr->winPtr,
CK_EV_EXPOSE | CK_EV_MAP | CK_EV_DESTROY,
EntryEventProc, (ClientData) entryPtr);
if (ConfigureEntry(interp, entryPtr, argc-2, argv+2, 0) != TCL_OK) {
goto error;
}
Tcl_SetResult(interp, entryPtr->winPtr->pathName, TCL_VOLATILE);
return TCL_OK;
error:
Ck_DestroyWindow(entryPtr->winPtr);
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;
char resultbuf[TCL_RESULT_SIZE];
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " option ?arg arg ...?\"", (char *) NULL);
return TCL_ERROR;
}
Ck_Preserve((ClientData) entryPtr);
c = argv[1][0];
length = strlen(argv[1]);
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 = Ck_ConfigureValue(interp, entryPtr->winPtr, configSpecs,
(char *) entryPtr, argv[2], 0);
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
&& (length >= 2)) {
if (argc == 2) {
result = Ck_ConfigureInfo(interp, entryPtr->winPtr, configSpecs,
(char *) entryPtr, (char *) NULL, 0);
} else if (argc == 3) {
result = Ck_ConfigureInfo(interp, entryPtr->winPtr, configSpecs,
(char *) entryPtr, argv[2], 0);
} else {
result = ConfigureEntry(interp, entryPtr, argc-2, argv+2,
CK_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 == ckNormalUid)) {
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;
}
Tcl_SetResult(interp, entryPtr->string, TCL_VOLATILE);
} 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;
}
snprintf(resultbuf, sizeof(resultbuf), "%d", index);
Tcl_SetResult(interp, resultbuf, TCL_VOLATILE);
} 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 == ckNormalUid) {
InsertChars(entryPtr, index, argv[3]);
}
} 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) {
Tcl_SetResult(interp, "0", TCL_STATIC);
} else {
Tcl_SetResult(interp, "1", TCL_STATIC);
}
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;
}
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);
snprintf(resultbuf, sizeof(resultbuf), "%g %g", first, last);
Tcl_SetResult(interp, resultbuf, TCL_VOLATILE);
goto done;
} else if (argc == 3) {
if (GetEntryIndex(interp, entryPtr, argv[2], &index) != TCL_OK) {
goto error;
}
} else {
type = Ck_GetScrollInfo(interp, argc, argv, &fraction, &count);
index = entryPtr->leftIndex;
switch (type) {
case CK_SCROLL_ERROR:
goto error;
case CK_SCROLL_MOVETO:
index = (int) (fraction * entryPtr->numChars);
break;
case CK_SCROLL_PAGES:
charsPerPage = entryPtr->winPtr->width - 2;
if (charsPerPage < 1)
charsPerPage = 1;
index += charsPerPage*count;
break;
case CK_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 cget, configure, delete, get, ",
"icursor, index, insert, selection, or xview",
(char *) NULL);
goto error;
}
done:
Ck_Release((ClientData) entryPtr);
return result;
error:
Ck_Release((ClientData) entryPtr);
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* DestroyEntry --
*
* This procedure is invoked by Ck_EventuallyFree or Ck_Release
* to clean up the internal structure of an entry at a safe time
* (when no-one is using it anymore).
*
* Results:
* None.
*
* Side effects:
* Everything associated with the entry is freed up.
*
*----------------------------------------------------------------------
*/
static void
DestroyEntry(clientData)
ClientData clientData; /* Info about entry widget. */
{
Entry *entryPtr = (Entry *) clientData;
/*
* Free up all the stuff that requires special handling, then
* let Ck_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->displayString != NULL) {
ckfree(entryPtr->displayString);
}
Ck_FreeOptions(configSpecs, (char *) entryPtr, 0);
ckfree((char *) entryPtr);
}
/*
*----------------------------------------------------------------------
*
* 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;
CkWindow *winPtr = entryPtr->winPtr;
/*
* This procedure could be invoked either because the window was
* destroyed and the command was then deleted (in which case winPtr
* is NULL) or because the command was deleted, and then this procedure
* destroys the widget.
*/
if (winPtr != NULL) {
entryPtr->winPtr = NULL;
Ck_DestroyWindow(winPtr);
}
}
/*
*----------------------------------------------------------------------
*
* 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. */
{
/*
* 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);
}
if (Ck_ConfigureWidget(interp, entryPtr->winPtr, configSpecs,
argc, argv, (char *) entryPtr, flags) != TCL_OK) {
return TCL_ERROR;
}
/*
* If the entry is tied to the value of a variable, then set up
* a trace on the variable's value, create the variable if it doesn't
* exist, and set the entry's value from the variable's value.
*/
if (entryPtr->textVarName != NULL) {
char *value;
value = Tcl_GetVar(interp, entryPtr->textVarName, TCL_GLOBAL_ONLY);
if (value == NULL) {
Tcl_SetVar(interp, entryPtr->textVarName, entryPtr->string,
TCL_GLOBAL_ONLY);
} else {
EntrySetValue(entryPtr, value);
}
Tcl_TraceVar(interp, entryPtr->textVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
EntryTextVarProc, (ClientData) entryPtr);
}
/*
* A few other options also need special processing, such as parsing
* the geometry and setting the colors.
*/
if ((entryPtr->state != ckNormalUid)
&& (entryPtr->state != ckDisabledUid)) {
Tcl_AppendResult(interp, "bad state value \"", entryPtr->state,
"\": must be normal or disabled", (char *) NULL);
entryPtr->state = ckNormalUid;
return TCL_ERROR;
}
/*
* Recompute the window's geometry and arrange for it to be
* redisplayed.
*/
EntryComputeGeometry(entryPtr);
entryPtr->flags |= UPDATE_SCROLLBAR;
EventuallyRedraw(entryPtr);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* DisplayEntry --
*
* This procedure redraws the contents of an entry window.
*
* Results:
* None.
*
* Side effects:
* Information appears on the screen.
*
*--------------------------------------------------------------
*/
static void
DisplayEntry(clientData)
ClientData clientData; /* Information about window. */
{
register Entry *entryPtr = (Entry *) clientData;
CkWindow *winPtr = entryPtr->winPtr;
int y, startX, leftIndex, selectFirst, selectLast, insertPos, dummy;
char *displayString;
entryPtr->flags &= ~REDRAW_PENDING;
if ((entryPtr->winPtr == NULL) || !(winPtr->flags & CK_MAPPED))
return;
/*
* Update the scrollbar if that's needed.
*/
if (entryPtr->flags & UPDATE_SCROLLBAR) {
EntryUpdateScrollbar(entryPtr);
}
/*
* Compute x-coordinate of the pixel just after last visible
* one, plus vertical position of baseline of text.
*/
y = winPtr->height / 2;
if (entryPtr->displayString == NULL) {
displayString = entryPtr->string;
} else {
displayString = entryPtr->displayString;
}
Ck_SetWindowAttr(winPtr, entryPtr->normalFg, entryPtr->normalBg,
entryPtr->normalAttr);
Ck_ClearToBot(winPtr, 0, 0);
#if CK_USE_UTF
leftIndex = Tcl_UtfAtIndex(displayString, entryPtr->leftIndex) -
displayString;
selectFirst = Tcl_UtfAtIndex(displayString, entryPtr->selectFirst) -
displayString;
selectLast = Tcl_UtfAtIndex(displayString, entryPtr->selectLast) -
displayString;
insertPos = Tcl_UtfAtIndex(displayString, entryPtr->insertPos) -
displayString;
#else
leftIndex = entryPtr->leftIndex;
selectFirst = entryPtr->selectFirst;
selectLast = entryPtr->selectLast;
insertPos = entryPtr->insertPos;
#endif
CkDisplayChars(winPtr->mainPtr, winPtr->window,
displayString + leftIndex,
strlen(displayString) - leftIndex,
entryPtr->leftX, y, entryPtr->tabOrigin,
CK_NEWLINES_NOT_SPECIAL);
if (entryPtr->selectLast >= entryPtr->leftIndex) {
if (entryPtr->selectFirst < entryPtr->leftIndex) {
startX = 0;
} else {
CkMeasureChars(winPtr->mainPtr,
displayString + leftIndex,
selectFirst - leftIndex, entryPtr->leftX,
winPtr->width, entryPtr->tabOrigin, CK_NEWLINES_NOT_SPECIAL,
&startX, &dummy);
}
if (startX < winPtr->width) {
Ck_SetWindowAttr(winPtr, entryPtr->selFg, entryPtr->selBg,
entryPtr->selAttr);
wmove(winPtr->window, y, startX + entryPtr->leftX);
CkDisplayChars(winPtr->mainPtr, winPtr->window,
displayString + selectFirst,
selectLast - selectFirst,
entryPtr->leftX + startX, y, entryPtr->tabOrigin,
CK_NEWLINES_NOT_SPECIAL);
Ck_SetWindowAttr(winPtr, entryPtr->normalFg, entryPtr->normalBg,
entryPtr->normalAttr);
}
}
CkMeasureChars(winPtr->mainPtr, displayString + leftIndex,
insertPos - leftIndex, entryPtr->leftX,
winPtr->width, entryPtr->tabOrigin, CK_NEWLINES_NOT_SPECIAL,
&startX, &dummy);
if (startX >= 0 && startX < winPtr->width) {
wmove(winPtr->window, y, startX);
if (entryPtr->state == ckNormalUid)
Ck_SetHWCursor(winPtr, 1);
else
Ck_SetHWCursor(winPtr, 0);
} else {
wmove(winPtr->window, y, 0);
Ck_SetHWCursor(winPtr, 0);
}
Ck_EventuallyRefresh(winPtr);
}
/*
*----------------------------------------------------------------------
*
* 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 tabOrigin fields are recomputed for entryPtr,
* and leftIndex may be adjusted. Ck_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;
int width, i, rightX, dummy;
char *p, *displayString;
CkWindow *winPtr = entryPtr->winPtr;
/*
* 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) {
#if CK_USE_UTF
int ulen;
entryPtr->displayString = (char *) ckalloc(entryPtr->numChars * 3 + 1);
ulen = Tcl_UtfNext(entryPtr->showChar) - entryPtr->showChar;
for (p = entryPtr->displayString, i = entryPtr->numChars; i > 0;
i--) {
memcpy(p, entryPtr->showChar, ulen);
p += ulen;
}
#else
entryPtr->displayString = (char *) ckalloc(entryPtr->numChars + 1);
for (p = entryPtr->displayString, i = entryPtr->numChars; i > 0;
i--, p++) {
*p = entryPtr->showChar[0];
}
#endif
*p = 0;
displayString = entryPtr->displayString;
} else {
displayString = entryPtr->string;
}
/*
* 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.
*/
CkMeasureChars(winPtr->mainPtr, displayString, strlen(displayString),
0, INT_MAX, 0,
CK_NEWLINES_NOT_SPECIAL, &totalLength, &dummy);
if (entryPtr->insertPos == entryPtr->numChars)
totalLength += 1;
overflow = totalLength - entryPtr->winPtr->width;
if (overflow < 0) {
entryPtr->leftIndex = 0;
if (entryPtr->justify == CK_JUSTIFY_LEFT) {
entryPtr->leftX = 0;
} else if (entryPtr->justify == CK_JUSTIFY_RIGHT) {
entryPtr->leftX = entryPtr->winPtr->width - totalLength;
} else {
entryPtr->leftX = (entryPtr->winPtr->width - totalLength) / 2;
}
entryPtr->tabOrigin = entryPtr->leftX;
} else {
int leftIndex;
/*
* 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 = CkMeasureChars(winPtr->mainPtr,
displayString, strlen(displayString),
0, overflow, 0, CK_NEWLINES_NOT_SPECIAL|CK_PARTIAL_OK, &rightX,
&dummy);
if (rightX < overflow) {
maxOffScreen += 1;
}
if (entryPtr->leftIndex > maxOffScreen) {