tkunixembed.c

linux系统下的音频通信

	    XMoveResizeWindow(eventPtr->xconfigure.display,
		    containerPtr->wrapper, 0, 0,
		    (unsigned int) Tk_Width(
			    (Tk_Window) containerPtr->parentPtr),
		    (unsigned int) Tk_Height(
			    (Tk_Window) containerPtr->parentPtr));
	    Tk_DeleteErrorHandler(errHandler);
	}
    } else if (eventPtr->type == DestroyNotify) {
	EmbedWindowDeleted(containerPtr->parentPtr);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedFocusProc --
 *
 *	This procedure is invoked by the Tk event dispatcher when
 *	FocusIn and FocusOut events occur for a container window owned
 *	by this application.  It is responsible for moving the focus
 *	back and forth between a container application and an embedded
 *	application.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The X focus may change.
 *
 *----------------------------------------------------------------------
 */

static void
EmbedFocusProc(clientData, eventPtr)
    ClientData clientData;		/* Token for container window. */
    XEvent *eventPtr;			/* ResizeRequest event. */
{
    Container *containerPtr = (Container *) clientData;
    Tk_ErrorHandler errHandler;
    Display *display;

    display = Tk_Display(containerPtr->parentPtr);
    if (eventPtr->type == FocusIn) {
	/*
	 * The focus just arrived at the container.  Change the X focus
	 * to move it to the embedded application, if there is one. 
	 * Ignore X errors that occur during this operation (it's
	 * possible that the new focus window isn't mapped).
	 */
    
	if (containerPtr->wrapper != None) {
	    errHandler = Tk_CreateErrorHandler(eventPtr->xfocus.display, -1,
		    -1, -1, (Tk_ErrorProc *) NULL, (ClientData) NULL);
	    XSetInputFocus(display, containerPtr->wrapper, RevertToParent,
		    CurrentTime);
	    Tk_DeleteErrorHandler(errHandler);
	}
    }
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedGeometryRequest --
 *
 *	This procedure is invoked when an embedded application requests
 *	a particular size.  It processes the request (which may or may
 *	not actually honor the request) and reflects the results back
 *	to the embedded application.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	If we deny the child's size change request, a Configure event
 *	is synthesized to let the child know how big it ought to be.
 *	Events get processed while we're waiting for the geometry
 *	managers to do their thing.
 *
 *----------------------------------------------------------------------
 */

static void
EmbedGeometryRequest(containerPtr, width, height)
    Container *containerPtr;	/* Information about the embedding. */
    int width, height;		/* Size that the child has requested. */
{
    TkWindow *winPtr = containerPtr->parentPtr;

    /*
     * Forward the requested size into our geometry management hierarchy
     * via the container window.  We need to send a Configure event back
     * to the embedded application if we decide not to honor its
     * request; to make this happen, process all idle event handlers
     * synchronously here (so that the geometry managers have had a
     * chance to do whatever they want to do), and if the window's size
     * didn't change then generate a configure event.
     */

    Tk_GeometryRequest((Tk_Window) winPtr, width, height);
    while (Tcl_DoOneEvent(TCL_IDLE_EVENTS)) {
	/* Empty loop body. */
    }
    if ((winPtr->changes.width != width)
	    || (winPtr->changes.height != height)) {
	EmbedSendConfigure(containerPtr);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedSendConfigure --
 *
 *	This procedure synthesizes a ConfigureNotify event to notify an
 *	embedded application of its current size and location.  This
 *	procedure is called when the embedded application made a
 *	geometry request that we did not grant, so that the embedded
 *	application knows that its geometry didn't change after all.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static void
EmbedSendConfigure(containerPtr)
    Container *containerPtr;	/* Information about the embedding. */
{
    TkWindow *winPtr = containerPtr->parentPtr;
    XEvent event;

    event.xconfigure.type = ConfigureNotify;
    event.xconfigure.serial =
	    LastKnownRequestProcessed(winPtr->display);
    event.xconfigure.send_event = True;
    event.xconfigure.display = winPtr->display;
    event.xconfigure.event = containerPtr->wrapper;
    event.xconfigure.window = containerPtr->wrapper;
    event.xconfigure.x = 0;
    event.xconfigure.y = 0;
    event.xconfigure.width = winPtr->changes.width;
    event.xconfigure.height = winPtr->changes.height;
    event.xconfigure.above = None;
    event.xconfigure.override_redirect = False;

    /*
     * Note:  when sending the event below, the ButtonPressMask
     * causes the event to be sent only to applications that have
     * selected for ButtonPress events, which should be just the
     * embedded application.
     */

    XSendEvent(winPtr->display, containerPtr->wrapper, False,
	    0, &event);

    /*
     * The following needs to be done if the embedded window is
     * not in the same application as the container window.
     */

    if (containerPtr->embeddedPtr == NULL) {
	XMoveResizeWindow(winPtr->display, containerPtr->wrapper, 0, 0,
	    (unsigned int) winPtr->changes.width,
	    (unsigned int) winPtr->changes.height);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkpGetOtherWindow --
 *
 *	If both the container and embedded window are in the same
 *	process, this procedure will return either one, given the other.
 *
 * Results:
 *	If winPtr is a container, the return value is the token for the
 *	embedded window, and vice versa.  If the "other" window isn't in
 *	this process, NULL is returned.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

TkWindow *
TkpGetOtherWindow(winPtr)
    TkWindow *winPtr;		/* Tk's structure for a container or
				 * embedded window. */
{
    Container *containerPtr;

    for (containerPtr = firstContainerPtr; containerPtr != NULL;
	    containerPtr = containerPtr->nextPtr) {
	if (containerPtr->embeddedPtr == winPtr) {
	    return containerPtr->parentPtr;
	} else if (containerPtr->parentPtr == winPtr) {
	    return containerPtr->embeddedPtr;
	}
    }
    panic("TkpGetOtherWindow couldn't find window");
    return NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpRedirectKeyEvent --
 *
 *	This procedure is invoked when a key press or release event
 *	arrives for an application that does not believe it owns the
 *	input focus.  This can happen because of embedding; for example,
 *	X can send an event to an embedded application when the real
 *	focus window is in the container application and is an ancestor
 *	of the container.  This procedure's job is to forward the event
 *	back to the application where it really belongs.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The event may get sent to a different application.
 *
 *----------------------------------------------------------------------
 */

void
TkpRedirectKeyEvent(winPtr, eventPtr)
    TkWindow *winPtr;		/* Window to which the event was originally
				 * reported. */
    XEvent *eventPtr;		/* X event to redirect (should be KeyPress
				 * or KeyRelease). */
{
    Container *containerPtr;
    Window saved;

    /*
     * First, find the top-level window corresponding to winPtr.
     */

    while (1) {
	if (winPtr == NULL) {
	    /*
	     * This window is being deleted.  This is too confusing a
	     * case to handle so discard the event.
	     */

	    return;
	}
	if (winPtr->flags & TK_TOP_LEVEL) {
	    break;
	}
	winPtr = winPtr->parentPtr;
    }

    if (winPtr->flags & TK_EMBEDDED) {
	/*
	 * This application is embedded.  If we got a key event without
	 * officially having the focus, it means that the focus is
	 * really in the container, but the mouse was over the embedded
	 * application.  Send the event back to the container.
	 */

	for (containerPtr = firstContainerPtr;
		containerPtr->embeddedPtr != winPtr;
		containerPtr = containerPtr->nextPtr) {
	    /* Empty loop body. */
	}
	saved = eventPtr->xkey.window;
	eventPtr->xkey.window = containerPtr->parent;
	XSendEvent(eventPtr->xkey.display, eventPtr->xkey.window, False,
	    KeyPressMask|KeyReleaseMask, eventPtr);
	eventPtr->xkey.window = saved;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkpClaimFocus --
 *
 *	This procedure is invoked when someone asks or the input focus
 *	to be put on a window in an embedded application, but the
 *	application doesn't currently have the focus.  It requests the
 *	input focus from the container application.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The input focus may change.
 *
 *----------------------------------------------------------------------
 */

void
TkpClaimFocus(topLevelPtr, force)
    TkWindow *topLevelPtr;		/* Top-level window containing desired
					 * focus window; should be embedded. */
    int force;				/* One means that the container should
					 * claim the focus if it doesn't
					 * currently have it. */
{
    XEvent event;
    Container *containerPtr;

    if (!(topLevelPtr->flags & TK_EMBEDDED)) {
	return;
    }

    for (containerPtr = firstContainerPtr;
	    containerPtr->embeddedPtr != topLevelPtr;
	    containerPtr = containerPtr->nextPtr) {
	/* Empty loop body. */
    }

    event.xfocus.type = FocusIn;
    event.xfocus.serial = LastKnownRequestProcessed(topLevelPtr->display);
    event.xfocus.send_event = 1;
    event.xfocus.display = topLevelPtr->display;
    event.xfocus.window = containerPtr->parent;
    event.xfocus.mode = EMBEDDED_APP_WANTS_FOCUS;
    event.xfocus.detail = force;
    XSendEvent(event.xfocus.display, event.xfocus.window, False, 0, &event);
}

/*
 *----------------------------------------------------------------------
 *
 * TkpTestembedCmd --
 *
 *	This procedure implements the "testembed" command.  It returns
 *	some or all of the information in the list pointed to by
 *	firstContainerPtr.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TkpTestembedCmd(clientData, interp, argc, argv)
    ClientData clientData;		/* Main window for application. */
    Tcl_Interp *interp;			/* Current interpreter. */
    int argc;				/* Number of arguments. */
    char **argv;			/* Argument strings. */
{
    int all;
    Container *containerPtr;
    Tcl_DString dString;
    char buffer[50];

    if ((argc > 1) && (strcmp(argv[1], "all") == 0)) {
	all = 1;
    } else {
	all = 0;
    }
    Tcl_DStringInit(&dString);
    for (containerPtr = firstContainerPtr; containerPtr != NULL;
	    containerPtr = containerPtr->nextPtr) {
	Tcl_DStringStartSublist(&dString);
	if (containerPtr->parent == None) {
	    Tcl_DStringAppendElement(&dString, "");
	} else {
	    if (all) {
		sprintf(buffer, "0x%x", (int) containerPtr->parent);
		Tcl_DStringAppendElement(&dString, buffer);
	    } else {
		Tcl_DStringAppendElement(&dString, "XXX");
	    }
	}
	if (containerPtr->parentPtr == NULL) {
	    Tcl_DStringAppendElement(&dString, "");
	} else {
	    Tcl_DStringAppendElement(&dString,
		    containerPtr->parentPtr->pathName);
	}
	if (containerPtr->wrapper == None) {
	    Tcl_DStringAppendElement(&dString, "");
	} else {
	    if (all) {
		sprintf(buffer, "0x%x", (int) containerPtr->wrapper);
		Tcl_DStringAppendElement(&dString, buffer);
	    } else {
		Tcl_DStringAppendElement(&dString, "XXX");
	    }
	}
	if (containerPtr->embeddedPtr == NULL) {
	    Tcl_DStringAppendElement(&dString, "");
	} else {
	    Tcl_DStringAppendElement(&dString,
		    containerPtr->embeddedPtr->pathName);
	}
	Tcl_DStringEndSublist(&dString);
    }
    Tcl_DStringResult(interp, &dString);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedWindowDeleted --
 *
 *	This procedure is invoked when a window involved in embedding
 *	(as either the container or the embedded application) is
 *	destroyed.  It cleans up the Container structure for the window.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	A Container structure may be freed.
 *
 *----------------------------------------------------------------------
 */

static void
EmbedWindowDeleted(winPtr)
    TkWindow *winPtr;		/* Tk's information about window that
				 * was deleted. */
{
    Container *containerPtr, *prevPtr;

    /*
     * Find the Container structure for this window work.  Delete the
     * information about the embedded application and free the container's
     * record.
     */

    prevPtr = NULL;
    containerPtr = firstContainerPtr;
    while (1) {
	if (containerPtr->embeddedPtr == winPtr) {
	    containerPtr->wrapper = None;
	    containerPtr->embeddedPtr = NULL;
	    break;
	}
	if (containerPtr->parentPtr == winPtr) {
	    containerPtr->parentPtr = NULL;
	    break;
	}
	prevPtr = containerPtr;
	containerPtr = containerPtr->nextPtr;
    }
    if ((containerPtr->embeddedPtr == NULL)
	    && (containerPtr->parentPtr == NULL)) {
	if (prevPtr == NULL) {
	    firstContainerPtr = containerPtr->nextPtr;
	} else {
	    prevPtr->nextPtr = containerPtr->nextPtr;
	}
	ckfree((char *) containerPtr);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkUnixContainerId --
 *
 *	Given an embedded window, this procedure returns the X window
 *	identifier for the associated container window.
 *
 * Results:
 *	The return value is the X window identifier for winPtr's
 *	container window.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

Window
TkUnixContainerId(winPtr)
    TkWindow *winPtr;		/* Tk's structure for an embedded window. */
{
    Container *containerPtr;

    for (containerPtr = firstContainerPtr; containerPtr != NULL;
	    containerPtr = containerPtr->nextPtr) {
	if (containerPtr->embeddedPtr == winPtr) {
	    return containerPtr->parent;
	}
    }
    panic("TkUnixContainerId couldn't find window");
    return None;
}