tktext.c

linux系统下的音频通信

/* 
 * tkText.c --
 *
 *	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) 1994-1996 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: @(#) tkText.c 1.104 97/10/13 15:18:24
 */

#include "default.h"
#include "tkPort.h"
#include "tkInt.h"

#ifdef MAC_TCL
#define Style TkStyle
#define DInfo TkDInfo
#endif

#include "tkText.h"

/*
 * Information used to parse text configuration options:
 */

static Tk_ConfigSpec configSpecs[] = {
    {TK_CONFIG_BORDER, "-background", "background", "Background",
	DEF_TEXT_BG_COLOR, Tk_Offset(TkText, border), TK_CONFIG_COLOR_ONLY},
    {TK_CONFIG_BORDER, "-background", "background", "Background",
	DEF_TEXT_BG_MONO, Tk_Offset(TkText, border), 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_TEXT_BORDER_WIDTH, Tk_Offset(TkText, borderWidth), 0},
    {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
	DEF_TEXT_CURSOR, Tk_Offset(TkText, cursor), TK_CONFIG_NULL_OK},
    {TK_CONFIG_BOOLEAN, "-exportselection", "exportSelection",
	"ExportSelection", DEF_TEXT_EXPORT_SELECTION,
	Tk_Offset(TkText, exportSelection), 0},
    {TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
	(char *) NULL, 0, 0},
    {TK_CONFIG_FONT, "-font", "font", "Font",
	DEF_TEXT_FONT, Tk_Offset(TkText, tkfont), 0},
    {TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
	DEF_TEXT_FG, Tk_Offset(TkText, fgColor), 0},
    {TK_CONFIG_PIXELS, "-height", "height", "Height",
	DEF_TEXT_HEIGHT, Tk_Offset(TkText, height), 0},
    {TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
	"HighlightBackground", DEF_TEXT_HIGHLIGHT_BG,
	Tk_Offset(TkText, highlightBgColorPtr), 0},
    {TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
	DEF_TEXT_HIGHLIGHT, Tk_Offset(TkText, highlightColorPtr), 0},
    {TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
	"HighlightThickness",
	DEF_TEXT_HIGHLIGHT_WIDTH, Tk_Offset(TkText, highlightWidth), 0},
    {TK_CONFIG_BORDER, "-insertbackground", "insertBackground", "Foreground",
	DEF_TEXT_INSERT_BG, Tk_Offset(TkText, insertBorder), 0},
    {TK_CONFIG_PIXELS, "-insertborderwidth", "insertBorderWidth", "BorderWidth",
	DEF_TEXT_INSERT_BD_COLOR, Tk_Offset(TkText, insertBorderWidth),
	TK_CONFIG_COLOR_ONLY},
    {TK_CONFIG_PIXELS, "-insertborderwidth", "insertBorderWidth", "BorderWidth",
	DEF_TEXT_INSERT_BD_MONO, Tk_Offset(TkText, insertBorderWidth),
	TK_CONFIG_MONO_ONLY},
    {TK_CONFIG_INT, "-insertofftime", "insertOffTime", "OffTime",
	DEF_TEXT_INSERT_OFF_TIME, Tk_Offset(TkText, insertOffTime), 0},
    {TK_CONFIG_INT, "-insertontime", "insertOnTime", "OnTime",
	DEF_TEXT_INSERT_ON_TIME, Tk_Offset(TkText, insertOnTime), 0},
    {TK_CONFIG_PIXELS, "-insertwidth", "insertWidth", "InsertWidth",
	DEF_TEXT_INSERT_WIDTH, Tk_Offset(TkText, insertWidth), 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_RELIEF, "-relief", "relief", "Relief",
	DEF_TEXT_RELIEF, Tk_Offset(TkText, relief), 0},
    {TK_CONFIG_BORDER, "-selectbackground", "selectBackground", "Foreground",
	DEF_TEXT_SELECT_COLOR, Tk_Offset(TkText, selBorder),
	TK_CONFIG_COLOR_ONLY},
    {TK_CONFIG_BORDER, "-selectbackground", "selectBackground", "Foreground",
	DEF_TEXT_SELECT_MONO, Tk_Offset(TkText, selBorder),
	TK_CONFIG_MONO_ONLY},
    {TK_CONFIG_STRING, "-selectborderwidth", "selectBorderWidth", "BorderWidth",
	DEF_TEXT_SELECT_BD_COLOR, Tk_Offset(TkText, selBdString),
	TK_CONFIG_COLOR_ONLY|TK_CONFIG_NULL_OK},
    {TK_CONFIG_STRING, "-selectborderwidth", "selectBorderWidth", "BorderWidth",
	DEF_TEXT_SELECT_BD_MONO, Tk_Offset(TkText, selBdString),
	TK_CONFIG_MONO_ONLY|TK_CONFIG_NULL_OK},
    {TK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background",
	DEF_TEXT_SELECT_FG_COLOR, Tk_Offset(TkText, selFgColorPtr),
	TK_CONFIG_COLOR_ONLY},
    {TK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background",
	DEF_TEXT_SELECT_FG_MONO, Tk_Offset(TkText, selFgColorPtr),
	TK_CONFIG_MONO_ONLY},
    {TK_CONFIG_BOOLEAN, "-setgrid", "setGrid", "SetGrid",
	DEF_TEXT_SET_GRID, Tk_Offset(TkText, setGrid), 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_((char *memPtr));
static void		InsertChars _ANSI_ARGS_((TkText *textPtr,
			    TkTextIndex *indexPtr, char *string));
static void		TextBlinkProc _ANSI_ARGS_((ClientData clientData));
static void		TextCmdDeletedProc _ANSI_ARGS_((
			    ClientData clientData));
static void		TextEventProc _ANSI_ARGS_((ClientData clientData,
			    XEvent *eventPtr));
static int		TextFetchSelection _ANSI_ARGS_((ClientData clientData,
			    int offset, char *buffer, int maxBytes));
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));
static void		TextWorldChanged _ANSI_ARGS_((
			    ClientData instanceData));
static int		TextDumpCmd _ANSI_ARGS_((TkText *textPtr,
			    Tcl_Interp *interp, int argc, char **argv));
static void		DumpLine _ANSI_ARGS_((Tcl_Interp *interp, 
			    TkText *textPtr, int what, TkTextLine *linePtr,
			    int start, int end, int lineno, char *command));
static int		DumpSegment _ANSI_ARGS_((Tcl_Interp *interp, char *key,
			    char *value, char * command, int lineno, int offset,
			    int what));

/*
 * The structure below defines text class behavior by means of procedures
 * that can be invoked from generic window code.
 */

static TkClassProcs textClass = {
    NULL,			/* createProc. */
    TextWorldChanged,		/* geometryProc. */
    NULL			/* modalProc. */
};


/*
 *--------------------------------------------------------------
 *
 * 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->display = Tk_Display(new);
    textPtr->interp = interp;
    textPtr->widgetCmd = Tcl_CreateCommand(interp,
	    Tk_PathName(textPtr->tkwin), TextWidgetCmd,
	    (ClientData) textPtr, TextCmdDeletedProc);
    textPtr->tree = TkBTreeCreate(textPtr);
    Tcl_InitHashTable(&textPtr->tagTable, TCL_STRING_KEYS);
    textPtr->numTags = 0;
    Tcl_InitHashTable(&textPtr->markTable, TCL_STRING_KEYS);
    Tcl_InitHashTable(&textPtr->windowTable, TCL_STRING_KEYS);
    Tcl_InitHashTable(&textPtr->imageTable, TCL_STRING_KEYS);
    textPtr->state = tkTextNormalUid;
    textPtr->border = NULL;
    textPtr->borderWidth = 0;
    textPtr->padX = 0;
    textPtr->padY = 0;
    textPtr->relief = TK_RELIEF_FLAT;
    textPtr->highlightWidth = 0;
    textPtr->highlightBgColorPtr = NULL;
    textPtr->highlightColorPtr = NULL;
    textPtr->cursor = None;
    textPtr->fgColor = NULL;
    textPtr->tkfont = NULL;
    textPtr->charWidth = 1;
    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->setGrid = 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->selBorder = NULL;
    textPtr->selBdString = NULL;
    textPtr->selFgColorPtr = NULL;
    textPtr->exportSelection = 1;
    textPtr->abortSelections = 0;
    textPtr->insertMarkPtr = NULL;
    textPtr->insertBorder = NULL;
    textPtr->insertWidth = 0;
    textPtr->insertBorderWidth = 0;
    textPtr->insertOnTime = 0;
    textPtr->insertOffTime = 0;
    textPtr->insertBlinkHandler = (Tcl_TimerToken) NULL;
    textPtr->bindingTable = NULL;
    textPtr->currentMarkPtr = NULL;
    textPtr->pickEvent.type = LeaveNotify;
    textPtr->pickEvent.xcrossing.x = 0;
    textPtr->pickEvent.xcrossing.y = 0;
    textPtr->numCurTags = 0;
    textPtr->curTagArrayPtr = NULL;
    textPtr->takeFocus = NULL;
    textPtr->xScrollCmd = NULL;
    textPtr->yScrollCmd = NULL;
    textPtr->flags = 0;

    /*
     * Create the "sel" tag and the "current" and "insert" marks.
     */

    textPtr->selTagPtr = TkTextCreateTag(textPtr, "sel");
    textPtr->selTagPtr->reliefString = (char *) ckalloc(7);
    strcpy(textPtr->selTagPtr->reliefString, DEF_TEXT_SELECT_RELIEF);
    textPtr->selTagPtr->relief = TK_RELIEF_RAISED;
    textPtr->currentMarkPtr = TkTextSetMark(textPtr, "current", &startIndex);
    textPtr->insertMarkPtr = TkTextSetMark(textPtr, "insert", &startIndex);

    Tk_SetClass(textPtr->tkwin, "Text");
    TkSetClassProcs(textPtr->tkwin, &textClass, (ClientData) textPtr);
    Tk_CreateEventHandler(textPtr->tkwin,
	    ExposureMask|StructureNotifyMask|FocusChangeMask,
	    TextEventProc, (ClientData) textPtr);
    Tk_CreateEventHandler(textPtr->tkwin, KeyPressMask|KeyReleaseMask
	    |ButtonPressMask|ButtonReleaseMask|EnterWindowMask
	    |LeaveWindowMask|PointerMotionMask|VirtualEventMask,
	    TkTextBindProc, (ClientData) textPtr);
    Tk_CreateSelHandler(textPtr->tkwin, XA_PRIMARY, XA_STRING,
	    TextFetchSelection, (ClientData) textPtr, XA_STRING);
    if (ConfigureText(interp, textPtr, argc-2, argv+2, 0) != TCL_OK) {
	Tk_DestroyWindow(textPtr->tkwin);
	return TCL_ERROR;
    }
    interp->result = Tk_PathName(textPtr->tkwin);

    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;
    }
    Tcl_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) {
	    sprintf(interp->result, "%d %d %d %d", x, y, 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);
	    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)) {