/*
* tkText.c (CTk) --
*
* This module provides a big chunk of the implementation of
* multi-line editable text widgets for Tk. Among other things,
* it provides the Tcl command interfaces to text widgets and
* the display code. The B-tree representation of text is
* implemented elsewhere.
*
* Copyright (c) 1992-1994 The Regents of the University of California.
* Copyright (c) 1994-1995 Sun Microsystems, Inc.
* Copyright (c) 1995 Cleveland Clinic Foundation
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* @(#) $Id: ctk.shar,v 1.50 1996/01/15 14:47:16 andrewm Exp andrewm $
*/
#include "default.h"
#include "tkPort.h"
#include "tkInt.h"
#include "tkText.h"
/*
* Information used to parse text configuration options:
*/
static Tk_ConfigSpec configSpecs[] = {
{TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
(char *) NULL, 0, 0},
{TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
DEF_TEXT_BORDER_WIDTH, Tk_Offset(TkText, borderWidth), 0},
{TK_CONFIG_PIXELS, "-height", "height", "Height",
DEF_TEXT_HEIGHT, Tk_Offset(TkText, height), 0},
{TK_CONFIG_PIXELS, "-padx", "padX", "Pad",
DEF_TEXT_PADX, Tk_Offset(TkText, padX), 0},
{TK_CONFIG_PIXELS, "-pady", "padY", "Pad",
DEF_TEXT_PADY, Tk_Offset(TkText, padY), 0},
{TK_CONFIG_PIXELS, "-spacing1", "spacing1", "Spacing",
DEF_TEXT_SPACING1, Tk_Offset(TkText, spacing1),
TK_CONFIG_DONT_SET_DEFAULT},
{TK_CONFIG_PIXELS, "-spacing2", "spacing2", "Spacing",
DEF_TEXT_SPACING2, Tk_Offset(TkText, spacing2),
TK_CONFIG_DONT_SET_DEFAULT},
{TK_CONFIG_PIXELS, "-spacing3", "spacing3", "Spacing",
DEF_TEXT_SPACING3, Tk_Offset(TkText, spacing3),
TK_CONFIG_DONT_SET_DEFAULT},
{TK_CONFIG_UID, "-state", "state", "State",
DEF_TEXT_STATE, Tk_Offset(TkText, state), 0},
{TK_CONFIG_STRING, "-tabs", "tabs", "Tabs",
DEF_TEXT_TABS, Tk_Offset(TkText, tabOptionString), TK_CONFIG_NULL_OK},
{TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_TEXT_TAKE_FOCUS, Tk_Offset(TkText, takeFocus),
TK_CONFIG_NULL_OK},
{TK_CONFIG_INT, "-width", "width", "Width",
DEF_TEXT_WIDTH, Tk_Offset(TkText, width), 0},
{TK_CONFIG_UID, "-wrap", "wrap", "Wrap",
DEF_TEXT_WRAP, Tk_Offset(TkText, wrapMode), 0},
{TK_CONFIG_STRING, "-xscrollcommand", "xScrollCommand", "ScrollCommand",
DEF_TEXT_XSCROLL_COMMAND, Tk_Offset(TkText, xScrollCmd),
TK_CONFIG_NULL_OK},
{TK_CONFIG_STRING, "-yscrollcommand", "yScrollCommand", "ScrollCommand",
DEF_TEXT_YSCROLL_COMMAND, Tk_Offset(TkText, yScrollCmd),
TK_CONFIG_NULL_OK},
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
(char *) NULL, 0, 0}
};
/*
* Tk_Uid's used to represent text states:
*/
Tk_Uid tkTextCharUid = NULL;
Tk_Uid tkTextDisabledUid = NULL;
Tk_Uid tkTextNoneUid = NULL;
Tk_Uid tkTextNormalUid = NULL;
Tk_Uid tkTextWordUid = NULL;
/*
* Boolean variable indicating whether or not special debugging code
* should be executed.
*/
int tkTextDebug = 0;
/*
* Forward declarations for procedures defined later in this file:
*/
static int ConfigureText _ANSI_ARGS_((Tcl_Interp *interp,
TkText *textPtr, int argc, char **argv, int flags));
static int DeleteChars _ANSI_ARGS_((TkText *textPtr,
char *index1String, char *index2String));
static void DestroyText _ANSI_ARGS_((ClientData clientData));
static void InsertChars _ANSI_ARGS_((TkText *textPtr,
TkTextIndex *indexPtr, char *string));
static void TextCmdDeletedProc _ANSI_ARGS_((
ClientData clientData));
static void TextEventProc _ANSI_ARGS_((ClientData clientData,
XEvent *eventPtr));
static int TextSearchCmd _ANSI_ARGS_((TkText *textPtr,
Tcl_Interp *interp, int argc, char **argv));
static int TextWidgetCmd _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, char **argv));
/*
*--------------------------------------------------------------
*
* Tk_TextCmd --
*
* This procedure is invoked to process the "text" 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_TextCmd(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;
Tk_Window new;
register TkText *textPtr;
TkTextIndex startIndex;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " pathName ?options?\"", (char *) NULL);
return TCL_ERROR;
}
/*
* Perform once-only initialization:
*/
if (tkTextNormalUid == NULL) {
tkTextCharUid = Tk_GetUid("char");
tkTextDisabledUid = Tk_GetUid("disabled");
tkTextNoneUid = Tk_GetUid("none");
tkTextNormalUid = Tk_GetUid("normal");
tkTextWordUid = Tk_GetUid("word");
}
/*
* Create the window.
*/
new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL);
if (new == NULL) {
return TCL_ERROR;
}
textPtr = (TkText *) ckalloc(sizeof(TkText));
textPtr->tkwin = new;
textPtr->interp = interp;
textPtr->widgetCmd = Tcl_CreateCommand(interp,
Tk_PathName(textPtr->tkwin), TextWidgetCmd,
(ClientData) textPtr, TextCmdDeletedProc);
textPtr->tree = TkBTreeCreate();
Tcl_InitHashTable(&textPtr->tagTable, TCL_STRING_KEYS);
textPtr->numTags = 0;
Tcl_InitHashTable(&textPtr->markTable, TCL_STRING_KEYS);
Tcl_InitHashTable(&textPtr->windowTable, TCL_STRING_KEYS);
textPtr->state = tkTextNormalUid;
textPtr->borderWidth = 0;
textPtr->padX = 0;
textPtr->padY = 0;
textPtr->spacing1 = 0;
textPtr->spacing2 = 0;
textPtr->spacing3 = 0;
textPtr->tabOptionString = NULL;
textPtr->tabArrayPtr = NULL;
textPtr->wrapMode = tkTextCharUid;
textPtr->width = 0;
textPtr->height = 0;
textPtr->prevWidth = Tk_Width(new);
textPtr->prevHeight = Tk_Height(new);
TkTextCreateDInfo(textPtr);
TkTextMakeIndex(textPtr->tree, 0, 0, &startIndex);
TkTextSetYView(textPtr, &startIndex, 0);
textPtr->selTagPtr = NULL;
textPtr->insertMarkPtr = NULL;
textPtr->takeFocus = NULL;
textPtr->xScrollCmd = NULL;
textPtr->yScrollCmd = NULL;
textPtr->flags = 0;
/*
* Create the "sel" tag and the "insert" mark.
*/
textPtr->selTagPtr = TkTextCreateTag(textPtr, "sel");
/*
* Should set "sel" tag to REVERSE style here (when I support
* setting arbitrary styles for tags).
*/
textPtr->insertMarkPtr = TkTextSetMark(textPtr, "insert", &startIndex);
Tk_SetClass(new, "Text");
Tk_CreateEventHandler(textPtr->tkwin,
CTK_EXPOSE_EVENT_MASK|CTK_DESTROY_EVENT_MASK|CTK_MAP_EVENT_MASK
|CTK_FOCUS_EVENT_MASK,
TextEventProc, (ClientData) textPtr);
if (ConfigureText(interp, textPtr, argc-2, argv+2, 0) != TCL_OK) {
Tk_DestroyWindow(textPtr->tkwin);
return TCL_ERROR;
}
Tcl_SetResult(interp,Tk_PathName(textPtr->tkwin),TCL_VOLATILE);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* TextWidgetCmd --
*
* This procedure is invoked to process the Tcl command
* that corresponds to a text widget. See the user
* documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*--------------------------------------------------------------
*/
static int
TextWidgetCmd(clientData, interp, argc, argv)
ClientData clientData; /* Information about text widget. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
register TkText *textPtr = (TkText *) clientData;
int result = TCL_OK;
size_t length;
int c;
TkTextIndex index1, index2;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " option ?arg arg ...?\"", (char *) NULL);
return TCL_ERROR;
}
Tk_Preserve((ClientData) textPtr);
c = argv[1][0];
length = strlen(argv[1]);
if ((c == 'b') && (strncmp(argv[1], "bbox", length) == 0)) {
int x, y, width, height;
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " bbox index\"", (char *) NULL);
result = TCL_ERROR;
goto done;
}
if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
if (TkTextCharBbox(textPtr, &index1, &x, &y, &width, &height) == 0) {
char buffer[80];
sprintf(buffer, "%d %d %d %d", x, y, width, height);
Tcl_SetResult(interp,buffer,TCL_VOLATILE);
}
} 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);
result = TCL_ERROR;
goto done;
}
result = Tk_ConfigureValue(interp, textPtr->tkwin, configSpecs,
(char *) textPtr, argv[2], 0);
} else if ((c == 'c') && (strncmp(argv[1], "compare", length) == 0)
&& (length >= 3)) {
int relation, value;
char *p;
if (argc != 5) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " compare index1 op index2\"", (char *) NULL);
result = TCL_ERROR;
goto done;
}
if ((TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK)
|| (TkTextGetIndex(interp, textPtr, argv[4], &index2)
!= TCL_OK)) {
result = TCL_ERROR;
goto done;
}
relation = TkTextIndexCmp(&index1, &index2);
p = argv[3];
if (p[0] == '<') {
value = (relation < 0);
if ((p[1] == '=') && (p[2] == 0)) {
value = (relation <= 0);
} else if (p[1] != 0) {
compareError:
Tcl_AppendResult(interp, "bad comparison operator \"",
argv[3], "\": must be <, <=, ==, >=, >, or !=",
(char *) NULL);
result = TCL_ERROR;
goto done;
}
} else if (p[0] == '>') {
value = (relation > 0);
if ((p[1] == '=') && (p[2] == 0)) {
value = (relation >= 0);
} else if (p[1] != 0) {
goto compareError;
}
} else if ((p[0] == '=') && (p[1] == '=') && (p[2] == 0)) {
value = (relation == 0);
} else if ((p[0] == '!') && (p[1] == '=') && (p[2] == 0)) {
value = (relation != 0);
} else {
goto compareError;
}
Tcl_SetResult(interp,(value) ? "1" : "0",TCL_STATIC);
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
&& (length >= 3)) {
if (argc == 2) {
result = Tk_ConfigureInfo(interp, textPtr->tkwin, configSpecs,
(char *) textPtr, (char *) NULL, 0);
} else if (argc == 3) {
result = Tk_ConfigureInfo(interp, textPtr->tkwin, configSpecs,
(char *) textPtr, argv[2], 0);
} else {
result = ConfigureText(interp, textPtr, argc-2, argv+2,
TK_CONFIG_ARGV_ONLY);
}
} else if ((c == 'd') && (strncmp(argv[1], "debug", length) == 0)
&& (length >= 3)) {
if (argc > 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " debug boolean\"", (char *) NULL);
result = TCL_ERROR;
goto done;
}
if (argc == 2) {
Tcl_SetResult(interp,(tkBTreeDebug) ? "1" : "0",TCL_STATIC);
} else {
if (Tcl_GetBoolean(interp, argv[2], &tkBTreeDebug) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
tkTextDebug = tkBTreeDebug;
}
} else if ((c == 'd') && (strncmp(argv[1], "delete", length) == 0)
&& (length >= 3)) {
if ((argc != 3) && (argc != 4)) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " delete index1 ?index2?\"", (char *) NULL);
result = TCL_ERROR;
goto done;
}
if (textPtr->state == tkTextNormalUid) {
result = DeleteChars(textPtr, argv[2],
(argc == 4) ? argv[3] : (char *) NULL);
}
} else if ((c == 'd') && (strncmp(argv[1], "dlineinfo", length) == 0)
&& (length >= 2)) {
int x, y, width, height, base;
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " dlineinfo index\"", (char *) NULL);
result = TCL_ERROR;
goto done;
}
if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
if (TkTextDLineInfo(textPtr, &index1, &x, &y, &width, &height, &base)
== 0) {
char buffer[100];
sprintf(buffer, "%d %d %d %d %d",
x, y, width, height, base);
Tcl_SetResult(interp,buffer,TCL_VOLATILE);
}
} else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) {
if ((argc != 3) && (argc != 4)) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " get index1 ?index2?\"", (char *) NULL);
result = TCL_ERROR;
goto done;
}
if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
if (argc == 3) {
index2 = index1;
TkTextIndexForwChars(&index2, 1, &index2);
} else if (TkTextGetIndex(interp, textPtr, argv[3], &index2)
!= TCL_OK) {
result = TCL_ERROR;
goto done;
}
if (TkTextIndexCmp(&index1, &index2) >= 0) {
goto done;
}
while (1) {
int offset, last, savedChar;
TkTextSegment *segPtr;
segPtr = TkTextIndexToSeg(&index1, &offset);
last = segPtr->size;
if (index1.linePtr == index2.linePtr) {
int last2;
if (index2.charIndex == index1.charIndex) {
break;
}
last2 = index2.charIndex - index1.charIndex + offset;
if (last2 < last) {
last = last2;
}
}
if (segPtr->typePtr == &tkTextCharType) {
savedChar = segPtr->body.chars[last];
segPtr->body.chars[last] = 0;
Tcl_AppendResult(interp, segPtr->body.chars + offset,
(char *) NULL);
segPtr->body.chars[last] = savedChar;
}
TkTextIndexForwChars(&index1, last-offset, &index1);
}
} else if ((c == 'i') && (strncmp(argv[1], "index", length) == 0)
&& (length >= 3)) {
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " index index\"",
(char *) NULL);
result = TCL_ERROR;
goto done;
}
if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
TkTextPrintIndex(&index1, interp->result);
} else if ((c == 'i') && (strncmp(argv[1], "insert", length) == 0)
&& (length >= 3)) {
int i, j, numTags;
char **tagNames;
TkTextTag **oldTagArrayPtr;
if (argc < 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0],
" insert index chars ?tagList chars tagList ...?\"",
(char *) NULL);
result = TCL_ERROR;
goto done;
}
if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
if (textPtr->state == tkTextNormalUid) {
for (j = 3; j < argc; j += 2) {
InsertChars(textPtr, &index1, argv[j]);
if (argc > (j+1)) {
TkTextIndexForwChars(&index1, (int) strlen(argv[j]),
&index2);
oldTagArrayPtr = TkBTreeGetTags(&index1, &numTags);
if (oldTagArrayPtr != NULL) {
for (i = 0; i < numTags; i++) {
TkBTreeTag(&index1, &index2, oldTagArrayPtr[i], 0);
}
ckfree((char *) oldTagArrayPtr);
}
if (Tcl_SplitList(interp, argv[j+1], &numTags, &tagNames)
!= TCL_OK) {
result = TCL_ERROR;
goto done;
}
for (i = 0; i < numTags; i++) {
TkBTreeTag(&index1, &index2,
TkTextCreateTag(textPtr, tagNames[i]), 1);
}
ckfree((char *) tagNames);
index1 = index2;
}
}
}
} else if ((c == 'm') && (strncmp(argv[1], "mark", length) == 0)) {
result = TkTextMarkCmd(textPtr, interp, argc, argv);
} else if ((c == 's') && (strcmp(argv[1], "scan") == 0) && (length >= 2)) {
result = Ctk_Unsupported(interp, "scan");
} else if ((c == 's') && (strcmp(argv[1], "search") == 0)
&& (length >= 3)) {
result = TextSearchCmd(textPtr, interp, argc, argv);
} else if ((c == 's') && (strcmp(argv[1], "see") == 0) && (length >= 3)) {
result = TkTextSeeCmd(textPtr, interp, argc, argv);
} else if ((c == 't') && (strcmp(argv[1], "tag") == 0)) {
result = TkTextTagCmd(textPtr, interp, argc, argv);
} else if ((c == 'w') && (strncmp(argv[1], "window", length) == 0)) {
/* result = TkTextWindowCmd(textPtr, interp, argc, argv); */
result = Ctk_Unsupported(interp, "window");
} else if ((c == 'x') && (strncmp(argv[1], "xview", length) == 0)) {
result = TkTextXviewCmd(textPtr, interp, argc, argv);
} else if ((c == 'y') && (strncmp(argv[1], "yview", length) == 0)
&& (length >= 2)) {
result = TkTextYviewCmd(textPtr, interp, argc, argv);
} else {
Tcl_AppendResult(interp, "bad option \"", argv[1],
"\": must be bbox, cget, compare, configure, debug, delete, ",
"dlineinfo, get, index, insert, mark, scan, search, see, ",
"tag, window, xview, or yview",
(char *) NULL);
result = TCL_ERROR;
}
done:
Tk_Release((ClientData) textPtr);
return result;
}
/*
*----------------------------------------------------------------------
*
* DestroyText --
*
* This procedure is invoked by Tk_EventuallyFree or Tk_Release
* to clean up the internal structure of a text at a safe time
* (when no-one is using it anymore).
*
* Results:
* None.
*
* Side effects:
* Everything associated with the text is freed up.
*
*----------------------------------------------------------------------
*/
static void
DestroyText(clientData)
ClientData clientData; /* Info about text widget. */
{
register TkText *textPtr = (TkText *) clientData;
Tcl_HashSearch search;
Tcl_HashEntry *hPtr;
TkTextTag *tagPtr;
/*
* Free up all the stuff that requires special handling, then
* let Tk_FreeOptions handle all the standard option-related
* stuff. Special note: free up display-related information
* before deleting the B-tree, since display-related stuff
* may refer to stuff in the B-tree.
*/
TkTextFreeDInfo(textPtr);
TkBTreeDestroy(textPtr->tree);
for (hPtr = Tcl_FirstHashEntry(&textPtr->tagTable, &search);
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
tagPtr = (TkTextTag *) Tcl_GetHashValue(hPtr);
TkTextFreeTag(textPtr, tagPtr);
}
Tcl_DeleteHashTable(&textPtr->tagTable);
for (hPtr = Tcl_FirstHashEntry(&textPtr->markTable, &search);
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
ckfree((char *) Tcl_GetHashValue(hPtr));
}
Tcl_DeleteHashTable(&textPtr->markTable);
if (textPtr->tabArrayPtr != NULL) {
ckfree((char *) textPtr->tabArrayPtr);
}
Tk_FreeOptions(configSpecs, (char *) textPtr, 0);
ckfree((char *) textPtr);
}
/*
*----------------------------------------------------------------------
*
* ConfigureText --
*
* This procedure is called to process an argv/argc list, plus
* the Tk option database, in order to configure (or
* reconfigure) a text 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 text string, colors, font,
* etc. get set for textPtr; old resources get freed, if there
* were any.
*
*----------------------------------------------------------------------
*/
static int
ConfigureText(interp, textPtr, argc, argv, flags)
Tcl_Interp *interp; /* Used for error reporting. */
register TkText *textPtr; /* 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. */
{
if (Tk_ConfigureWidget(interp, textPtr->tkwin, configSpecs,
argc, argv, (char *) textPtr, flags) != TCL_OK) {
return TCL_ERROR;
}
/*
* A few other options also need special processing, such as parsing
* the geometry and setting the background from a 3-D border.
*/
if ((textPtr->state != tkTextNormalUid)
&& (textPtr->state != tkTextDisabledUid)) {
Tcl_AppendResult(interp, "bad state value \"", textPtr->state,
"\": must be normal or disabled", (char *) NULL);
textPtr->state = tkTextNormalUid;
return TCL_ERROR;
}
if ((textPtr->wrapMode != tkTextCharUid)
&& (textPtr->wrapMode != tkTextNoneUid)
&& (textPtr->wrapMode != tkTextWordUid)) {
Tcl_AppendResult(interp, "bad wrap mode \"", textPtr->wrapMode,
"\": must be char, none, or word", (char *) NULL);
textPtr->wrapMode = tkTextCharUid;
return TCL_ERROR;
}
/*
* Don't allow negative spacings.
*/
if (textPtr->spacing1 < 0) {
textPtr->spacing1 = 0;
}
if (textPtr->spacing2 < 0) {
textPtr->spacing2 = 0;
}
if (textPtr->spacing3 < 0) {
textPtr->spacing3 = 0;
}
/*
* Parse tab stops.
*/
if (textPtr->tabArrayPtr != NULL) {
ckfree((char *) textPtr->tabArrayPtr);
textPtr->tabArrayPtr = NULL;
}
if (textPtr->tabOptionString != NULL) {
textPtr->tabArrayPtr = TkTextGetTabs(interp, textPtr->tkwin,
textPtr->tabOptionString);
if (textPtr->tabArrayPtr == NULL) {
Tcl_AddErrorInfo(interp,"\n (while processing -tabs option)");
return TCL_ERROR;
}
}
/*
* Make sure that configuration options are properly mirrored
* between the widget record and the "sel" tags. NOTE: we don't
* have to free up information during the mirroring; old
* information was freed when it was replaced in the widget
* record.
*/
textPtr->selTagPtr->affectsDisplay = 0;
if ((textPtr->selTagPtr->justifyString != NULL)
|| (textPtr->selTagPtr->lMargin1String != NULL)
|| (textPtr->selTagPtr->lMargin2String != NULL)
|| (textPtr->selTagPtr->offsetString != NULL)
|| (textPtr->selTagPtr->rMarginString != NULL)
|| (textPtr->selTagPtr->spacing1String != NULL)
|| (textPtr->selTagPtr->spacing2String != NULL)
|| (textPtr->selTagPtr->spacing3String != NULL)
|| (textPtr->selTagPtr->tabString != NULL)
|| (textPtr->selTagPtr->underlineString != NULL)
|| (textPtr->selTagPtr->wrapMode != NULL)) {
textPtr->selTagPtr->affectsDisplay = 1;
}
TkTextRedrawTag(textPtr, (TkTextIndex *) NULL, (TkTextIndex *) NULL,
textPtr->selTagPtr, 1);
/*
* Register the desired geometry for the window, and arrange for
* the window to be redisplayed.
*/
if (textPtr->width <= 0) {
textPtr->width = 1;
}
if (textPtr->height <= 0) {
textPtr->height = 1;
}
Tk_GeometryRequest(textPtr->tkwin,
textPtr->width + 2*textPtr->borderWidth + 2*textPtr->padX,
textPtr->height + 2*textPtr->borderWidth + 2*textPtr->padY);
Tk_SetInternalBorder(textPtr->tkwin, textPtr->borderWidth);
TkTextRelayoutWindow(textPtr);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* TextEventProc --
*
* This procedure is invoked by the Tk dispatcher on
* structure changes to a text. For texts with 3D
* borders, this procedure is also invoked for exposures.
*
* Results:
* None.
*
* Side effects:
* When the window gets deleted, internal structures get
* cleaned up. When it gets exposed, it is redisplayed.
*
*--------------------------------------------------------------
*/
static void
TextEventProc(clientData, eventPtr)
ClientData clientData; /* Information about window. */
register XEvent *eventPtr; /* Information about event. */
{
register TkText *textPtr = (TkText *) clientData;
TkTextIndex index, index2;
if (eventPtr->type == CTK_EXPOSE_EVENT) {
TkTextRedrawRegion(textPtr,
eventPtr->u.expose.left, eventPtr->u.expose.top,
eventPtr->u.expose.right - eventPtr->u.expose.left,
eventPtr->u.expose.bottom - eventPtr->u.expose.top);
} else if (eventPtr->type == CTK_MAP_EVENT) {
if ((textPtr->prevWidth != Tk_Width(textPtr->tkwin))
|| (textPtr->prevHeight != Tk_Height(textPtr->tkwin))) {
TkTextRelayoutWindow(textPtr);
textPtr->prevWidth = Tk_Width(textPtr->tkwin);
textPtr->prevHeight = Tk_Height(textPtr->tkwin);
}
} else if (eventPtr->type == CTK_DESTROY_EVENT) {
if (textPtr->tkwin != NULL) {
textPtr->tkwin = NULL;
Tcl_DeleteCommand(textPtr->interp,
Tcl_GetCommandName(textPtr->interp,
textPtr->widgetCmd));
}
Tk_EventuallyFree((ClientData) textPtr, DestroyText);
} else if (eventPtr->type == CTK_FOCUS_EVENT) {
textPtr->flags |= GOT_FOCUS;
TkTextMarkSegToIndex(textPtr, textPtr->insertMarkPtr, &index);
TkTextIndexForwChars(&index, 1, &index2);
TkTextChanged(textPtr, &index, &index2);
} else if (eventPtr->type == CTK_UNFOCUS_EVENT) {
textPtr->flags &= ~GOT_FOCUS;
}
}
/*
*----------------------------------------------------------------------
*
* TextCmdDeletedProc --
*
* 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
TextCmdDeletedProc(clientData)
ClientData clientData; /* Pointer to widget record for widget. */
{
TkText *textPtr = (TkText *) clientData;
Tk_Window tkwin = textPtr->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) {
textPtr->tkwin = NULL;
Tk_DestroyWindow(tkwin);
}
}
/*
*----------------------------------------------------------------------
*
* InsertChars --
*
* This procedure implements most of the functionality of the
* "insert" widget command.
*
* Results:
* None.
*
* Side effects:
* The characters in "string" get added to the text just before
* the character indicated by "indexPtr".
*
*----------------------------------------------------------------------
*/
static void
InsertChars(textPtr, indexPtr, string)
TkText *textPtr; /* Overall information about text widget. */
TkTextIndex *indexPtr; /* Where to insert new characters. May be
* modified and/or invalidated. */
char *string; /* Null-terminated string containing new
* information to add to text. */
{
int lineIndex;
/*
* Don't allow insertions on the last (dummy) line of the text.
*/
lineIndex = TkBTreeLineIndex(indexPtr->linePtr);
if (lineIndex == TkBTreeNumLines(textPtr->tree)) {
lineIndex--;
TkTextMakeIndex(textPtr->tree, lineIndex, 1000000, indexPtr);
}
/*
* Notify the display module that lines are about to change, then do
* the insertion.
*/
TkTextChanged(textPtr, indexPtr, indexPtr);
TkBTreeInsertChars(indexPtr, string);
}
/*
*----------------------------------------------------------------------
*
* DeleteChars --
*
* This procedure implements most of the functionality of the
* "delete" widget command.
*
* Results:
* Returns a standard Tcl result, and leaves an error message
* in textPtr->interp if there is an error.
*
* Side effects:
* Characters get deleted from the text.
*
*----------------------------------------------------------------------
*/
static int
DeleteChars(textPtr, index1String, index2String)
TkText *textPtr; /* Overall information about text widget. */
char *index1String; /* String describing location of first
* character to delete. */
char *index2String; /* String describing location of last
* character to delete. NULL means just
* delete the one character given by
* index1String. */
{
int line1, line2, line, charIndex, resetView;
TkTextIndex index1, index2;
/*
* Parse the starting and stopping indices.
*/
if (TkTextGetIndex(textPtr->interp, textPtr, index1String, &index1)
!= TCL_OK) {
return TCL_ERROR;
}
if (index2String != NULL) {
if (TkTextGetIndex(textPtr->interp, textPtr, index2String, &index2)
!= TCL_OK) {
return TCL_ERROR;
}
} else {
index2 = index1;
TkTextIndexForwChars(&index2, 1, &index2);
}
/*
* Make sure there's really something to delete.
*/
if (TkTextIndexCmp(&index1, &index2) >= 0) {
return TCL_OK;
}
/*
* The code below is ugly, but it's needed to make sure there
* is always a dummy empty line at the end of the text. If the
* final newline of the file (just before the dummy line) is being
* deleted, then back up index to just before the newline. If
* there is a newline just before the first character being deleted,
* then back up the first index too, so that an even number of lines
* gets deleted. Furthermore, remove any tags that are present on
* the newline that isn't going to be deleted after all (this simulates
* deleting the newline and then adding a "clean" one back again).
*/
line1 = TkBTreeLineIndex(index1.linePtr);
line2 = TkBTreeLineIndex(index2.linePtr);
if (line2 == TkBTreeNumLines(textPtr->tree)) {
TkTextTag **arrayPtr;
int arraySize, i;
TkTextIndex oldIndex2;
oldIndex2 = index2;
TkTextIndexBackChars(&oldIndex2, 1, &index2);
line2--;
if ((index1.charIndex == 0) && (line1 != 0)) {
TkTextIndexBackChars(&index1, 1, &index1);
line1--;
}
arrayPtr = TkBTreeGetTags(&index2, &arraySize);
if (arrayPtr != NULL) {
for (i = 0; i < arraySize; i++) {
TkBTreeTag(&index2, &oldIndex2, arrayPtr[i], 0);
}
ckfree((char *) arrayPtr);
}
}
/*
* Tell the display what's about to happen so it can discard
* obsolete display information, then do the deletion. Also,
* if the deletion involves the top line on the screen, then
* we have to reset the view (the deletion will invalidate
* textPtr->topIndex). Compute what the new first character
* will be, then do the deletion, then reset the view.
*/
TkTextChanged(textPtr, &index1, &index2);
resetView = line = charIndex = 0;
if (TkTextIndexCmp(&index2, &textPtr->topIndex) >= 0) {
if (TkTextIndexCmp(&index1, &textPtr->topIndex) <= 0) {
/*
* Deletion range straddles topIndex: use the beginning
* of the range as the new topIndex.
*/
resetView = 1;
line = line1;
charIndex = index1.charIndex;
} else if (index1.linePtr == textPtr->topIndex.linePtr) {
/*
* Deletion range starts on top line but after topIndex.
* Use the current topIndex as the new one.
*/
resetView = 1;
line = line1;
charIndex = textPtr->topIndex.charIndex;
}
} else if (index2.linePtr == textPtr->topIndex.linePtr) {
/*
* Deletion range ends on top line but before topIndex.
* Figure out what will be the new character index for
* the character currently pointed to by topIndex.
*/
resetView = 1;
line = line2;
charIndex = textPtr->topIndex.charIndex;
if (index1.linePtr != index2.linePtr) {
charIndex -= index2.charIndex;
} else {
charIndex -= (index2.charIndex - index1.charIndex);
}
}
TkBTreeDeleteChars(&index1, &index2);
if (resetView) {
TkTextMakeIndex(textPtr->tree, line, charIndex, &index1);
TkTextSetYView(textPtr, &index1, 0);
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* TextSearchCmd --
*
* This procedure is invoked to process the "search" widget command
* for text widgets. See the user documentation for details on what
* it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
TextSearchCmd(textPtr, interp, argc, argv)
TkText *textPtr; /* Information about text widget. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
int backwards, exact, c, i, argsLeft, noCase, leftToScan;
size_t length;
int numLines, startingLine, startingChar, lineNum, firstChar, lastChar;
int code, matchLength, matchChar, passes, stopLine, searchWholeText;
int patLength;
char *arg, *pattern, *varName, *p, *startOfLine;
char buffer[20];
TkTextIndex index, stopIndex;
Tcl_DString line, patDString;
TkTextSegment *segPtr;
TkTextLine *linePtr;
Tcl_RegExp regexp = NULL; /* Initialization needed only to
* prevent compiler warning. */
/*
* Parse switches and other arguments.
*/
exact = 1;
backwards = 0;
noCase = 0;
varName = NULL;
for (i = 2; i < argc; i++) {
arg = argv[i];
if (arg[0] != '-') {
break;
}
length = strlen(arg);
if (length < 2) {
badSwitch:
Tcl_AppendResult(interp, "bad switch \"", arg,
"\": must be -forward, -backward, -exact, -regexp, ",
"-nocase, -count, or --", (char *) NULL);
return TCL_ERROR;
}
c = arg[1];
if ((c == 'b') && (strncmp(argv[i], "-backwards", length) == 0)) {
backwards = 1;
} else if ((c == 'c') && (strncmp(argv[i], "-count", length) == 0)) {
if (i >= (argc-1)) {
Tcl_SetResult(interp,"no value given for \"-count\" option",TCL_STATIC);
return TCL_ERROR;
}
i++;
varName = argv[i];
} else if ((c == 'e') && (strncmp(argv[i], "-exact", length) == 0)) {
exact = 1;
} else if ((c == 'f') && (strncmp(argv[i], "-forwards", length) == 0)) {
backwards = 0;
} else if ((c == 'n') && (strncmp(argv[i], "-nocase", length) == 0)) {
noCase = 1;
} else if ((c == 'r') && (strncmp(argv[i], "-regexp", length) == 0)) {
exact = 0;
} else if ((c == '-') && (strncmp(argv[i], "--", length) == 0)) {
i++;
break;
} else {
goto badSwitch;
}
}
argsLeft = argc - (i+2);
if ((argsLeft != 0) && (argsLeft != 1)) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " search ?switches? pattern index ?stopIndex?",
(char *) NULL);
return TCL_ERROR;
}
pattern = argv[i];
/*
* Convert the pattern to lower-case if we're supposed to ignore case.
*/
if (noCase) {
Tcl_DStringInit(&patDString);
Tcl_DStringAppend(&patDString, pattern, -1);
pattern = Tcl_DStringValue(&patDString);
for (p = pattern; *p != 0; p++) {
if (isupper(UCHAR(*p))) {
*p = tolower(UCHAR(*p));
}
}
}
if (TkTextGetIndex(interp, textPtr, argv[i+1], &index) != TCL_OK) {
return TCL_ERROR;
}
numLines = TkBTreeNumLines(textPtr->tree);
startingLine = TkBTreeLineIndex(index.linePtr);
startingChar = index.charIndex;
if (startingLine >= numLines) {
if (backwards) {
startingLine = TkBTreeNumLines(textPtr->tree) - 1;
startingChar = TkBTreeCharsInLine(TkBTreeFindLine(textPtr->tree,
startingLine));
} else {
startingLine = 0;
startingChar = 0;
}
}
if (argsLeft == 1) {
if (TkTextGetIndex(interp, textPtr, argv[i+2], &stopIndex) != TCL_OK) {
return TCL_ERROR;
}
stopLine = TkBTreeLineIndex(stopIndex.linePtr);
if (!backwards && (stopLine == numLines)) {
stopLine = numLines-1;
}
searchWholeText = 0;
} else {
stopLine = 0;
searchWholeText = 1;
}
/*
* Scan through all of the lines of the text circularly, starting
* at the given index.
*/
matchLength = patLength = 0; /* Only needed to prevent compiler
* warnings. */
if (exact) {
patLength = strlen(pattern);
} else {
regexp = Tcl_RegExpCompile(interp, pattern);
if (regexp == NULL) {
return TCL_ERROR;
}
}
lineNum = startingLine;
code = TCL_OK;
Tcl_DStringInit(&line);
for (passes = 0; passes < 2; ) {
if (lineNum >= numLines) {
/*
* Don't search the dummy last line of the text.
*/
goto nextLine;
}
/*
* Extract the text from the line. If we're doing regular
* expression matching, drop the newline from the line, so
* that "$" can be used to match the end of the line.
*/
linePtr = TkBTreeFindLine(textPtr->tree, lineNum);
for (segPtr = linePtr->segPtr; segPtr != NULL;
segPtr = segPtr->nextPtr) {
if (segPtr->typePtr != &tkTextCharType) {
continue;
}
Tcl_DStringAppend(&line, segPtr->body.chars, segPtr->size);
}
if (!exact) {
Tcl_DStringSetLength(&line, Tcl_DStringLength(&line)-1);
}
startOfLine = Tcl_DStringValue(&line);
/*
* If we're ignoring case, convert the line to lower case.
*/
if (noCase) {
for (p = Tcl_DStringValue(&line); *p != 0; p++) {
if (isupper(UCHAR(*p))) {
*p = tolower(UCHAR(*p));
}
}
}
/*
* Check for matches within the current line. If so, and if we're
* searching backwards, repeat the search to find the last match
* in the line.
*/
matchChar = -1;
firstChar = 0;
lastChar = INT_MAX;
if (lineNum == startingLine) {
int indexInDString;
/*
* The starting line is tricky: the first time we see it
* we check one part of the line, and the second pass through
* we check the other part of the line. We have to be very
* careful here because there could be embedded windows or
* other things that are not in the extracted line. Rescan
* the original line to compute the index in it of the first
* character.
*/
indexInDString = startingChar;
for (segPtr = linePtr->segPtr, leftToScan = startingChar;
leftToScan > 0; segPtr = segPtr->nextPtr) {
if (segPtr->typePtr != &tkTextCharType) {
indexInDString -= segPtr->size;
}
leftToScan -= segPtr->size;
}
passes++;
if ((passes == 1) ^ backwards) {
/*
* Only use the last part of the line.
*/
firstChar = indexInDString;
if (firstChar >= Tcl_DStringLength(&line)) {
goto nextLine;
}
} else {
/*
* Use only the first part of the line.
*/
lastChar = indexInDString;
}
}
do {
int thisLength;
if (exact) {
p = strstr(startOfLine + firstChar, pattern);
if (p == NULL) {
break;
}
i = p - startOfLine;
thisLength = patLength;
} else {
char *start, *end;
int match;
match = Tcl_RegExpExec(interp, regexp,
startOfLine + firstChar, startOfLine);
if (match < 0) {
code = TCL_ERROR;
goto done;
}
if (!match) {
break;
}
Tcl_RegExpRange(regexp, 0, &start, &end);
i = start - startOfLine;
thisLength = end - start;
}
if (i >= lastChar) {
break;
}
matchChar = i;
matchLength = thisLength;
firstChar = matchChar+1;
} while (backwards);
/*
* If we found a match then we're done. Make sure that
* the match occurred before the stopping index, if one was
* specified.
*/
if (matchChar >= 0) {
/*
* The index information returned by the regular expression
* parser only considers textual information: it doesn't
* account for embedded windows or any other non-textual info.
* Scan through the line's segments again to adjust both
* matchChar and matchCount.
*/
for (segPtr = linePtr->segPtr, leftToScan = matchChar;
leftToScan >= 0; segPtr = segPtr->nextPtr) {
if (segPtr->typePtr != &tkTextCharType) {
matchChar += segPtr->size;
continue;
}
leftToScan -= segPtr->size;
}
for (leftToScan += matchLength; leftToScan > 0;
segPtr = segPtr->nextPtr) {
if (segPtr->typePtr != &tkTextCharType) {
matchLength += segPtr->size;
continue;
}
leftToScan -= segPtr->size;
}
TkTextMakeIndex(textPtr->tree, lineNum, matchChar, &index);
if (!searchWholeText) {
if (!backwards && (TkTextIndexCmp(&index, &stopIndex) >= 0)) {
goto done;
}
if (backwards && (TkTextIndexCmp(&index, &stopIndex) < 0)) {
goto done;
}
}
if (varName != NULL) {
sprintf(buffer, "%d", matchLength);
if (Tcl_SetVar(interp, varName, buffer, TCL_LEAVE_ERR_MSG)
== NULL) {
code = TCL_ERROR;
goto done;
}
}
TkTextPrintIndex(&index, interp->result);
goto done;
}
/*
* Go to the next (or previous) line;
*/
nextLine:
if (backwards) {
lineNum--;
if (!searchWholeText) {
if (lineNum < stopLine) {
break;
}
} else if (lineNum < 0) {
lineNum = numLines-1;
}
} else {
lineNum++;
if (!searchWholeText) {
if (lineNum > stopLine) {
break;
}
} else if (lineNum >= numLines) {
lineNum = 0;
}
}
Tcl_DStringSetLength(&line, 0);
}
done:
Tcl_DStringFree(&line);
if (noCase) {
Tcl_DStringFree(&patDString);
}
return code;
}
/*
*----------------------------------------------------------------------
*
* TkTextGetTabs --
*
* Parses a string description of a set of tab stops.
*
* Results:
* The return value is a pointer to a malloc'ed structure holding
* parsed information about the tab stops. If an error occurred
* then the return value is NULL and an error message is left in
* interp->result.
*
* Side effects:
* Memory is allocated for the structure that is returned. It is
* up to the caller to free this structure when it is no longer
* needed.
*
*----------------------------------------------------------------------
*/
TkTextTabArray *
TkTextGetTabs(interp, tkwin, string)
Tcl_Interp *interp; /* Used for error reporting. */
Tk_Window tkwin; /* Window in which the tabs will be
* used. */
char *string; /* Description of the tab stops. See
* the text manual entry for details. */
{
int argc, i, count, c;
char **argv;
TkTextTabArray *tabArrayPtr;
TkTextTab *tabPtr;
if (Tcl_SplitList(interp, string, &argc, &argv) != TCL_OK) {
return NULL;
}
/*
* First find out how many entries we need to allocate in the
* tab array.
*/
count = 0;
for (i = 0; i < argc; i++) {
c = argv[i][0];
if ((c != 'l') && (c != 'r') && (c != 'c') && (c != 'n')) {
count++;
}
}
/*
* Parse the elements of the list one at a time to fill in the
* array.
*/
tabArrayPtr = (TkTextTabArray *) ckalloc((unsigned)
(sizeof(TkTextTabArray) + (count-1)*sizeof(TkTextTab)));
tabArrayPtr->numTabs = 0;
for (i = 0, tabPtr = &tabArrayPtr->tabs[0]; i < argc; i++, tabPtr++) {
if (Tk_GetPixels(interp, tkwin, argv[i], &tabPtr->location)
!= TCL_OK) {
goto error;
}
tabArrayPtr->numTabs++;
/*
* See if there is an explicit alignment in the next list
* element. Otherwise just use "left".
*/
tabPtr->alignment = LEFT;
if ((i+1) == argc) {
continue;
}
c = UCHAR(argv[i+1][0]);
if (!isalpha(c)) {
continue;
}
i += 1;
if ((c == 'l') && (strncmp(argv[i], "left",
strlen(argv[i])) == 0)) {
tabPtr->alignment = LEFT;
} else if ((c == 'r') && (strncmp(argv[i], "right",
strlen(argv[i])) == 0)) {
tabPtr->alignment = RIGHT;
} else if ((c == 'c') && (strncmp(argv[i], "center",
strlen(argv[i])) == 0)) {
tabPtr->alignment = CENTER;
} else if ((c == 'n') && (strncmp(argv[i],
"numeric", strlen(argv[i])) == 0)) {
tabPtr->alignment = NUMERIC;
} else {
Tcl_AppendResult(interp, "bad tab alignment \"",
argv[i], "\": must be left, right, center, or numeric",
(char *) NULL);
goto error;
}
}
ckfree((char *) argv);
return tabArrayPtr;
error:
ckfree((char *) tabArrayPtr);
ckfree((char *) argv);
return NULL;
}