tkbind.c

linux系统下的音频通信

    {"Lock",		LockMask,	0},
    {"Meta",		META_MASK,	0},
    {"M",		META_MASK,	0},
    {"Alt",		ALT_MASK,	0},
    {"B1",		Button1Mask,	0},
    {"Button1",		Button1Mask,	0},
    {"B2",		Button2Mask,	0},
    {"Button2",		Button2Mask,	0},
    {"B3",		Button3Mask,	0},
    {"Button3",		Button3Mask,	0},
    {"B4",		Button4Mask,	0},
    {"Button4",		Button4Mask,	0},
    {"B5",		Button5Mask,	0},
    {"Button5",		Button5Mask,	0},
    {"Mod1",		Mod1Mask,	0},
    {"M1",		Mod1Mask,	0},
    {"Command",		Mod1Mask,	0},
    {"Mod2",		Mod2Mask,	0},
    {"M2",		Mod2Mask,	0},
    {"Option",		Mod2Mask,	0},
    {"Mod3",		Mod3Mask,	0},
    {"M3",		Mod3Mask,	0},
    {"Mod4",		Mod4Mask,	0},
    {"M4",		Mod4Mask,	0},
    {"Mod5",		Mod5Mask,	0},
    {"M5",		Mod5Mask,	0},
    {"Double",		0,		DOUBLE},
    {"Triple",		0,		TRIPLE},
    {"Any",		0,		0},	/* Ignored: historical relic. */
    {NULL,		0,		0}
};
static Tcl_HashTable modTable;

/*
 * This module also keeps a hash table mapping from event names
 * to information about those events.  The structure, an array
 * to use to initialize the hash table, and the hash table are
 * all defined below.
 */

typedef struct {
    char *name;			/* Name of event. */
    int type;			/* Event type for X, such as
				 * ButtonPress. */
    int eventMask;		/* Mask bits (for XSelectInput)
				 * for this event type. */
} EventInfo;

/*
 * Note:  some of the masks below are an OR-ed combination of
 * several masks.  This is necessary because X doesn't report
 * up events unless you also ask for down events.  Also, X
 * doesn't report button state in motion events unless you've
 * asked about button events.
 */

static EventInfo eventArray[] = {
    {"Key",		KeyPress,		KeyPressMask},
    {"KeyPress",	KeyPress,		KeyPressMask},
    {"KeyRelease",	KeyRelease,		KeyPressMask|KeyReleaseMask},
    {"Button",		ButtonPress,		ButtonPressMask},
    {"ButtonPress",	ButtonPress,		ButtonPressMask},
    {"ButtonRelease",	ButtonRelease,
	    ButtonPressMask|ButtonReleaseMask},
    {"Motion",		MotionNotify,
	    ButtonPressMask|PointerMotionMask},
    {"Enter",		EnterNotify,		EnterWindowMask},
    {"Leave",		LeaveNotify,		LeaveWindowMask},
    {"FocusIn",		FocusIn,		FocusChangeMask},
    {"FocusOut",	FocusOut,		FocusChangeMask},
    {"Expose",		Expose,			ExposureMask},
    {"Visibility",	VisibilityNotify,	VisibilityChangeMask},
    {"Destroy",		DestroyNotify,		StructureNotifyMask},
    {"Unmap",		UnmapNotify,		StructureNotifyMask},
    {"Map",		MapNotify,		StructureNotifyMask},
    {"Reparent",	ReparentNotify,		StructureNotifyMask},
    {"Configure",	ConfigureNotify,	StructureNotifyMask},
    {"Gravity",		GravityNotify,		StructureNotifyMask},
    {"Circulate",	CirculateNotify,	StructureNotifyMask},
    {"Property",	PropertyNotify,		PropertyChangeMask},
    {"Colormap",	ColormapNotify,		ColormapChangeMask},
    {"Activate",	ActivateNotify,		ActivateMask},
    {"Deactivate",	DeactivateNotify,	ActivateMask},
    {(char *) NULL,	0,			0}
};
static Tcl_HashTable eventTable;

/*
 * The defines and table below are used to classify events into
 * various groups.  The reason for this is that logically identical
 * fields (e.g. "state") appear at different places in different
 * types of events.  The classification masks can be used to figure
 * out quickly where to extract information from events.
 */

#define KEY			0x1
#define BUTTON			0x2
#define MOTION			0x4
#define CROSSING		0x8
#define FOCUS			0x10
#define EXPOSE			0x20
#define VISIBILITY		0x40
#define CREATE			0x80
#define DESTROY			0x100
#define UNMAP			0x200
#define MAP			0x400
#define REPARENT		0x800
#define CONFIG			0x1000
#define GRAVITY			0x2000
#define CIRC			0x4000
#define PROP			0x8000
#define COLORMAP		0x10000
#define VIRTUAL			0x20000
#define ACTIVATE		0x40000

#define KEY_BUTTON_MOTION_VIRTUAL	(KEY|BUTTON|MOTION|VIRTUAL)

static int flagArray[TK_LASTEVENT] = {
   /* Not used */		0,
   /* Not used */		0,
   /* KeyPress */		KEY,
   /* KeyRelease */		KEY,
   /* ButtonPress */		BUTTON,
   /* ButtonRelease */		BUTTON,
   /* MotionNotify */		MOTION,
   /* EnterNotify */		CROSSING,
   /* LeaveNotify */		CROSSING,
   /* FocusIn */		FOCUS,
   /* FocusOut */		FOCUS,
   /* KeymapNotify */		0,
   /* Expose */			EXPOSE,
   /* GraphicsExpose */		EXPOSE,
   /* NoExpose */		0,
   /* VisibilityNotify */	VISIBILITY,
   /* CreateNotify */		CREATE,
   /* DestroyNotify */		DESTROY,
   /* UnmapNotify */		UNMAP,
   /* MapNotify */		MAP,
   /* MapRequest */		0,
   /* ReparentNotify */		REPARENT,
   /* ConfigureNotify */	CONFIG,
   /* ConfigureRequest */	0,
   /* GravityNotify */		GRAVITY,
   /* ResizeRequest */		0,
   /* CirculateNotify */	CIRC,
   /* CirculateRequest */	0,
   /* PropertyNotify */		PROP,
   /* SelectionClear */		0,
   /* SelectionRequest */	0,
   /* SelectionNotify */	0,
   /* ColormapNotify */		COLORMAP,
   /* ClientMessage */		0,
   /* MappingNotify */		0,
   /* VirtualEvent */		VIRTUAL,
   /* Activate */		ACTIVATE,	    
   /* Deactivate */		ACTIVATE
};

/*
 * The following tables are used as a two-way map between X's internal
 * numeric values for fields in an XEvent and the strings used in Tcl.  The
 * tables are used both when constructing an XEvent from user input and
 * when providing data from an XEvent to the user.
 */

static TkStateMap notifyMode[] = {
    {NotifyNormal,		"NotifyNormal"},
    {NotifyGrab,		"NotifyGrab"},
    {NotifyUngrab,		"NotifyUngrab"},
    {NotifyWhileGrabbed,	"NotifyWhileGrabbed"},
    {-1, NULL}
};

static TkStateMap notifyDetail[] = {
    {NotifyAncestor,		"NotifyAncestor"},
    {NotifyVirtual,		"NotifyVirtual"},
    {NotifyInferior,		"NotifyInferior"},
    {NotifyNonlinear,		"NotifyNonlinear"},
    {NotifyNonlinearVirtual,	"NotifyNonlinearVirtual"},
    {NotifyPointer,		"NotifyPointer"},
    {NotifyPointerRoot,		"NotifyPointerRoot"},
    {NotifyDetailNone,		"NotifyDetailNone"},
    {-1, NULL}
};

static TkStateMap circPlace[] = {
    {PlaceOnTop,		"PlaceOnTop"},
    {PlaceOnBottom,		"PlaceOnBottom"},
    {-1, NULL}
};

static TkStateMap visNotify[] = {
    {VisibilityUnobscured,	    "VisibilityUnobscured"},
    {VisibilityPartiallyObscured,   "VisibilityPartiallyObscured"},
    {VisibilityFullyObscured,	    "VisibilityFullyObscured"},
    {-1, NULL}
};

/*
 * Prototypes for local procedures defined in this file:
 */

static void		ChangeScreen _ANSI_ARGS_((Tcl_Interp *interp,
			    char *dispName, int screenIndex));
static int		CreateVirtualEvent _ANSI_ARGS_((Tcl_Interp *interp,
			    VirtualEventTable *vetPtr, char *virtString,
			    char *eventString));
static int		DeleteVirtualEvent _ANSI_ARGS_((Tcl_Interp *interp,
			    VirtualEventTable *vetPtr, char *virtString,
			    char *eventString));
static void		DeleteVirtualEventTable _ANSI_ARGS_((
			    VirtualEventTable *vetPtr));
static void		ExpandPercents _ANSI_ARGS_((TkWindow *winPtr,
			    char *before, XEvent *eventPtr, KeySym keySym,
			    Tcl_DString *dsPtr));
static void		FreeTclBinding _ANSI_ARGS_((ClientData clientData));
static PatSeq *		FindSequence _ANSI_ARGS_((Tcl_Interp *interp,
			    Tcl_HashTable *patternTablePtr, ClientData object,
			    char *eventString, int create, int allowVirtual,
			    unsigned long *maskPtr));
static void		GetAllVirtualEvents _ANSI_ARGS_((Tcl_Interp *interp,
			    VirtualEventTable *vetPtr));
static char *		GetField _ANSI_ARGS_((char *p, char *copy, int size));
static KeySym		GetKeySym _ANSI_ARGS_((TkDisplay *dispPtr,
			    XEvent *eventPtr));
static void		GetPatternString _ANSI_ARGS_((PatSeq *psPtr,
			    Tcl_DString *dsPtr));
static int		GetVirtualEvent _ANSI_ARGS_((Tcl_Interp *interp,
			    VirtualEventTable *vetPtr, char *virtString));
static Tk_Uid		GetVirtualEventUid _ANSI_ARGS_((Tcl_Interp *interp,
			    char *virtString));
static int		HandleEventGenerate _ANSI_ARGS_((Tcl_Interp *interp,
			    Tk_Window main, int argc, char **argv));
static void		InitKeymapInfo _ANSI_ARGS_((TkDisplay *dispPtr));
static void		InitVirtualEventTable _ANSI_ARGS_((
			    VirtualEventTable *vetPtr));
static PatSeq *		MatchPatterns _ANSI_ARGS_((TkDisplay *dispPtr,
			    BindingTable *bindPtr, PatSeq *psPtr,
			    PatSeq *bestPtr, ClientData *objectPtr,
			    PatSeq **sourcePtrPtr));
static int		ParseEventDescription _ANSI_ARGS_((Tcl_Interp *interp,
			    char **eventStringPtr, Pattern *patPtr,
			    unsigned long *eventMaskPtr));

/*
 * The following define is used as a short circuit for the callback
 * procedure to evaluate a TclBinding.  The actual evaluation of the
 * binding is handled inline, because special things have to be done
 * with a Tcl binding before evaluation time.
 */

#define EvalTclBinding	((TkBindEvalProc *) 1)


/*
 *---------------------------------------------------------------------------
 *
 * TkBindInit --
 *
 *	This procedure is called when an application is created.  It
 *	initializes all the structures used by bindings and virtual
 *	events.  It must be called before any other functions in this
 *	file are called.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Memory allocated.
 *
 *---------------------------------------------------------------------------
 */

void
TkBindInit(mainPtr)
    TkMainInfo *mainPtr;	/* The newly created application. */
{
    BindInfo *bindInfoPtr;

    if (sizeof(XEvent) < sizeof(XVirtualEvent)) {
	panic("TkBindInit: virtual events can't be supported");
    }

    /*
     * Initialize the static data structures used by the binding package.
     * They are only initialized once, no matter how many interps are
     * created.
     */

    if (!initialized) {
	Tcl_HashEntry *hPtr;
	ModInfo *modPtr;
	EventInfo *eiPtr;
	int dummy;

#ifdef REDO_KEYSYM_LOOKUP
	KeySymInfo *kPtr;

	Tcl_InitHashTable(&keySymTable, TCL_STRING_KEYS);
	Tcl_InitHashTable(&nameTable, TCL_ONE_WORD_KEYS);
	for (kPtr = keyArray; kPtr->name != NULL; kPtr++) {
	    hPtr = Tcl_CreateHashEntry(&keySymTable, kPtr->name, &dummy);
	    Tcl_SetHashValue(hPtr, kPtr->value);
	    hPtr = Tcl_CreateHashEntry(&nameTable, (char *) kPtr->value,
		    &dummy);
	    Tcl_SetHashValue(hPtr, kPtr->name);
	}
#endif /* REDO_KEYSYM_LOOKUP */

	Tcl_InitHashTable(&modTable, TCL_STRING_KEYS);
	for (modPtr = modArray; modPtr->name != NULL; modPtr++) {
	    hPtr = Tcl_CreateHashEntry(&modTable, modPtr->name, &dummy);
	    Tcl_SetHashValue(hPtr, modPtr);
	}
    
	Tcl_InitHashTable(&eventTable, TCL_STRING_KEYS);
	for (eiPtr = eventArray; eiPtr->name != NULL; eiPtr++) {
	    hPtr = Tcl_CreateHashEntry(&eventTable, eiPtr->name, &dummy);
	    Tcl_SetHashValue(hPtr, eiPtr);
	}
	initialized = 1;
    }

    mainPtr->bindingTable = Tk_CreateBindingTable(mainPtr->interp);

    bindInfoPtr = (BindInfo *) ckalloc(sizeof(BindInfo));
    InitVirtualEventTable(&bindInfoPtr->virtualEventTable);
    bindInfoPtr->screenInfo.curDispPtr = NULL;
    bindInfoPtr->screenInfo.curScreenIndex = -1;
    bindInfoPtr->screenInfo.bindingDepth = 0;
    bindInfoPtr->pendingList = NULL;
    mainPtr->bindInfo = (TkBindInfo) bindInfoPtr;

    TkpInitializeMenuBindings(mainPtr->interp, mainPtr->bindingTable);
}

/*
 *---------------------------------------------------------------------------
 *
 * TkBindFree --
 *
 *	This procedure is called when an application is deleted.  It
 *	deletes all the structures used by bindings and virtual events.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Memory freed.
 *
 *---------------------------------------------------------------------------
 */

void
TkBindFree(mainPtr)
    TkMainInfo *mainPtr;	/* The newly created application. */
{
    BindInfo *bindInfoPtr;
    
    Tk_DeleteBindingTable(mainPtr->bindingTable);
    mainPtr->bindingTable = NULL;

    bindInfoPtr = (BindInfo *) mainPtr->bindInfo;
    DeleteVirtualEventTable(&bindInfoPtr->virtualEventTable);
    mainPtr->bindInfo = NULL;
}

/*
 *--------------------------------------------------------------
 *
 * Tk_CreateBindingTable --
 *
 *	Set up a new domain in which event bindings may be created.
 *
 * Results:
 *	The return value is a token for the new table, which must
 *	be passed to procedures like Tk_CreatBinding.
 *
 * Side effects:
 *	Memory is allocated for the new table.
 *
 *--------------------------------------------------------------
 */

Tk_BindingTable
Tk_CreateBindingTable(interp)
    Tcl_Interp *interp;		/* Interpreter to associate with the binding
				 * table:  commands are executed in this
				 * interpreter. */
{
    BindingTable *bindPtr;
    int i;

    /*
     * Create and initialize a new binding table.
     */

    bindPtr = (BindingTable *) ckalloc(sizeof(BindingTable));
    for (i = 0; i < EVENT_BUFFER_SIZE; i++) {
	bindPtr->eventRing[i].type = -1;
    }
    bindPtr->curEvent = 0;
    Tcl_InitHashTable(&bindPtr->patternTable,
	    sizeof(PatternTableKey)/sizeof(int));
    Tcl_InitHashTable(&bindPtr->objectTable, TCL_ONE_WORD_KEYS);
    bindPtr->interp = interp;
    return (Tk_BindingTable) bindPtr;
}

/*
 *--------------------------------------------------------------
 *
 * Tk_DeleteBindingTable --
 *