/* * tkUnixEmbed.c -- * * This file contains platform-specific functions for UNIX to provide * basic operations needed for application embedding (where one * application can use as its main window an internal window from some * other application). * * Copyright (c) 1996-1997 Sun Microsystems, Inc. * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ #include "tkUnixInt.h" /* * One of the following structures exists for each container in this * application. It keeps track of the container window and its associated * embedded window. */ typedef struct Container { Window parent; /* X's window id for the parent of the pair * (the container). */ Window parentRoot; /* Id for the root window of parent's * screen. */ TkWindow *parentPtr; /* Tk's information about the container, or * NULL if the container isn't in this * process. */ Window wrapper; /* X's window id for the wrapper window for * the embedded window. Starts off as None, * but gets filled in when the window is * eventually created. */ TkWindow *embeddedPtr; /* Tk's information about the embedded window, * or NULL if the embedded application isn't * in this process. Note that this is *not* * the same window as wrapper: wrapper is the * parent of embeddedPtr. */ struct Container *nextPtr; /* Next in list of all containers in this * process. */ } Container; typedef struct ThreadSpecificData { Container *firstContainerPtr; /* First in list of all containers managed by * this process. */ } ThreadSpecificData; static Tcl_ThreadDataKey dataKey; /* * Prototypes for static functions defined in this file: */ static void ContainerEventProc(ClientData clientData, XEvent *eventPtr); static void EmbeddedEventProc(ClientData clientData, XEvent *eventPtr); static int EmbedErrorProc(ClientData clientData, XErrorEvent *errEventPtr); static void EmbedFocusProc(ClientData clientData, XEvent *eventPtr); static void EmbedGeometryRequest(Container *containerPtr, int width, int height); static void EmbedSendConfigure(Container *containerPtr); static void EmbedStructureProc(ClientData clientData, XEvent *eventPtr); static void EmbedWindowDeleted(TkWindow *winPtr); /* *---------------------------------------------------------------------- * * TkpUseWindow -- * * This function causes a Tk window to use a given X window as its parent * window, rather than the root window for the screen. It is invoked by * an embedded application to specify the window in which it is embedded. * * Results: * The return value is normally TCL_OK. If an error occurs (such as * string not being a valid window spec), then the return value is * TCL_ERROR and an error message is left in the interp's result if * interp is non-NULL. * * Side effects: * Changes the colormap and other visual information to match that of the * parent window given by "string". * *---------------------------------------------------------------------- */ int TkpUseWindow( Tcl_Interp *interp, /* If not NULL, used for error reporting if * string is bogus. */ Tk_Window tkwin, /* Tk window that does not yet have an * associated X window. */ CONST char *string) /* String identifying an X window to use for * tkwin; must be an integer value. */ { TkWindow *winPtr = (TkWindow *) tkwin; TkWindow *usePtr; int id, anyError; Window parent; Tk_ErrorHandler handler; Container *containerPtr; XWindowAttributes parentAtts; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); if (winPtr->window != None) { Tcl_AppendResult(interp, "can't modify container after widget is created", NULL); return TCL_ERROR; } if (Tcl_GetInt(interp, string, &id) != TCL_OK) { return TCL_ERROR; } parent = (Window) id; usePtr = (TkWindow *) Tk_IdToWindow(winPtr->display, parent); if (usePtr != NULL) { if (!(usePtr->flags & TK_CONTAINER)) { Tcl_AppendResult(interp, "window \"", usePtr->pathName, "\" doesn't have -container option set", NULL); return TCL_ERROR; } } /* * Tk sets the window colormap to the screen default colormap in * tkWindow.c:AllocWindow. This doesn't work well for embedded windows. So * we override the colormap and visual settings to be the same as the * parent window (which is in the container app). */ anyError = 0; handler = Tk_CreateErrorHandler(winPtr->display, -1, -1, -1, EmbedErrorProc, (ClientData) &anyError); if (!XGetWindowAttributes(winPtr->display, parent, &parentAtts)) { anyError = 1; } XSync(winPtr->display, False); Tk_DeleteErrorHandler(handler); if (anyError) { if (interp != NULL) { Tcl_AppendResult(interp, "couldn't create child of window \"", string, "\"", NULL); } return TCL_ERROR; } Tk_SetWindowVisual(tkwin, parentAtts.visual, parentAtts.depth, parentAtts.colormap); /* * Create an event handler to clean up the Container structure when tkwin * is eventually deleted. */ Tk_CreateEventHandler(tkwin, StructureNotifyMask, EmbeddedEventProc, (ClientData) winPtr); /* * Save information about the container and the embedded window in a * Container structure. If there is already an existing Container * structure, it means that both container and embedded app. are in the * same process. */ for (containerPtr = tsdPtr->firstContainerPtr; containerPtr != NULL; containerPtr = containerPtr->nextPtr) { if (containerPtr->parent == parent) { winPtr->flags |= TK_BOTH_HALVES; containerPtr->parentPtr->flags |= TK_BOTH_HALVES; break; } } if (containerPtr == NULL) { containerPtr = (Container *) ckalloc(sizeof(Container)); containerPtr->parent = parent; containerPtr->parentRoot = parentAtts.root; containerPtr->parentPtr = NULL; containerPtr->wrapper = None; containerPtr->nextPtr = tsdPtr->firstContainerPtr; tsdPtr->firstContainerPtr = containerPtr; } containerPtr->embeddedPtr = winPtr; winPtr->flags |= TK_EMBEDDED; return TCL_OK; } /* *---------------------------------------------------------------------- * * TkpMakeWindow -- * * Create an actual window system window object based on the current * attributes of the specified TkWindow. * * Results: * Returns the handle to the new window, or None on failure. * * Side effects: * Creates a new X window. * *---------------------------------------------------------------------- */ Window TkpMakeWindow( TkWindow *winPtr, /* Tk's information about the window that is * to be instantiated. */ Window parent) /* Window system token for the parent in which * the window is to be created. */ { Container *containerPtr; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); if (winPtr->flags & TK_EMBEDDED) { /* * This window is embedded. Don't create the new window in the given * parent; instead, create it as a child of the root window of the * container's screen. The window will get reparented into a wrapper * window later. */ for (containerPtr = tsdPtr->firstContainerPtr; ; containerPtr = containerPtr->nextPtr) { if (containerPtr == NULL) { Tcl_Panic("TkMakeWindow couldn't find container for window"); } if (containerPtr->embeddedPtr == winPtr) { break; } } parent = containerPtr->parentRoot; } return XCreateWindow(winPtr->display, parent, winPtr->changes.x, winPtr->changes.y, (unsigned) winPtr->changes.width, (unsigned) winPtr->changes.height, (unsigned) winPtr->changes.border_width, winPtr->depth, InputOutput, winPtr->visual, winPtr->dirtyAtts, &winPtr->atts); } /* *---------------------------------------------------------------------- * * TkpMakeContainer -- * * This function is called to indicate that a particular window will be a * container for an embedded application. This changes certain aspects of * the window's behavior, such as whether it will receive events anymore. * * Results: * None. * * Side effects: * None. * *---------------------------------------------------------------------- */ void TkpMakeContainer( Tk_Window tkwin) /* Token for a window that is about to become * a container. */ { TkWindow *winPtr = (TkWindow *) tkwin; Container *containerPtr; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); /* * Register the window as a container so that, for example, we can find * out later if the embedded app. is in the same process. */ Tk_MakeWindowExist(tkwin); containerPtr = (Container *) ckalloc(sizeof(Container)); containerPtr->parent = Tk_WindowId(tkwin); containerPtr->parentRoot = RootWindowOfScreen(Tk_Screen(tkwin)); containerPtr->parentPtr = winPtr; containerPtr->wrapper = None; containerPtr->embeddedPtr = NULL; containerPtr->nextPtr = tsdPtr->firstContainerPtr; tsdPtr->firstContainerPtr = containerPtr; winPtr->flags |= TK_CONTAINER; /* * Request SubstructureNotify events so that we can find out when the * embedded application creates its window or attempts to resize it. Also * watch Configure events on the container so that we can resize the child * to match. */ winPtr->atts.event_mask |= SubstructureRedirectMask|SubstructureNotifyMask; XSelectInput(winPtr->display, winPtr->window, winPtr->atts.event_mask); Tk_CreateEventHandler(tkwin, SubstructureNotifyMask|SubstructureRedirectMask, ContainerEventProc, (ClientData) winPtr); Tk_CreateEventHandler(tkwin, StructureNotifyMask, EmbedStructureProc, (ClientData) containerPtr); Tk_CreateEventHandler(tkwin, FocusChangeMask, EmbedFocusProc, (ClientData) containerPtr); } /* *---------------------------------------------------------------------- * * EmbedErrorProc -- * * This function is invoked if an error occurs while creating an embedded * window. * * Results: * Always returns 0 to indicate that the error has been properly handled. * * Side effects: * The integer pointed to by the clientData argument is set to 1. * *---------------------------------------------------------------------- */ static int EmbedErrorProc( ClientData clientData, /* Points to integer to set. */ XErrorEvent *errEventPtr) /* Points to information about error (not * used). */ { int *iPtr = (int *) clientData; *iPtr = 1; return 0; } /* *---------------------------------------------------------------------- * * EmbeddedEventProc -- * * This function is invoked by the Tk event dispatcher when various * useful events are received for a window that is embedded in another * application. * * Results: * None. * * Side effects: * Our internal state gets cleaned up when an embedded window is * destroyed. * *---------------------------------------------------------------------- */ static void EmbeddedEventProc( ClientData clientData, /* Token for container window. */ XEvent *eventPtr) /* ResizeRequest event. */ { TkWindow *winPtr = (TkWindow *) clientData; if (eventPtr->type == DestroyNotify) { EmbedWindowDeleted(winPtr); } } /* *---------------------------------------------------------------------- * * ContainerEventProc -- * * This function is invoked by the Tk event dispatcher when various * useful events are received for the children of a container window. It * forwards relevant information, such as geometry requests, from the * events into the container's application. * * Results: * None. * * Side effects: * Depends on the event. For example, when ConfigureRequest events occur, * geometry information gets set for the container window. * *---------------------------------------------------------------------- */ static void ContainerEventProc( ClientData clientData, /* Token for container window. */ XEvent *eventPtr) /* ResizeRequest event. */ { TkWindow *winPtr = (TkWindow *) clientData; Container *containerPtr; Tk_ErrorHandler errHandler; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); /* * Ignore any X protocol errors that happen in this function (almost any * operation could fail, for example, if the embedded application has * deleted its window). */ errHandler = Tk_CreateErrorHandler(eventPtr->xfocus.display, -1, -1, -1, NULL, (ClientData) NULL); /* * Find the Container structure associated with the parent window. */ for (containerPtr = tsdPtr->firstContainerPtr; containerPtr->parent != eventPtr->xmaprequest.parent; containerPtr = containerPtr->nextPtr) { if (containerPtr == NULL) { Tcl_Panic("ContainerEventProc couldn't find Container record"); } } if (eventPtr->type == CreateNotify) { /* * A new child window has been created in the container. Record its id * in the Container structure (if more than one child is created, just * remember the last one and ignore the earlier ones). Also set the * child's size to match the container. */ containerPtr->wrapper = eventPtr->xcreatewindow.window; XMoveResizeWindow(eventPtr->xcreatewindow.display, containerPtr->wrapper, 0, 0, (unsigned) Tk_Width((Tk_Window) containerPtr->parentPtr), (unsigned) Tk_Height((Tk_Window) containerPtr->parentPtr)); } else if (eventPtr->type == ConfigureRequest) { if ((eventPtr->xconfigurerequest.x != 0) || (eventPtr->xconfigurerequest.y != 0)) { /* * The embedded application is trying to move itself, which isn't * legal. At this point, the window hasn't actually moved, but we * need to send it a ConfigureNotify event to let it know that its * request has been denied. If the embedded application was also * trying to resize itself, a ConfigureNotify will be sent by the * geometry management code below, so we don't need to do * anything. Otherwise, generate a synthetic event. */ if ((eventPtr->xconfigurerequest.width == winPtr->changes.width) && (eventPtr->xconfigurerequest.height == winPtr->changes.height)) { EmbedSendConfigure(containerPtr); } } EmbedGeometryRequest(containerPtr, eventPtr->xconfigurerequest.width, eventPtr->xconfigurerequest.height); } else if (eventPtr->type == MapRequest) { /* * The embedded application's map request was ignored and simply * passed on to us, so we have to map the window for it to appear on * the screen. */ XMapWindow(eventPtr->xmaprequest.display, eventPtr->xmaprequest.window); } else if (eventPtr->type == DestroyNotify) { /* * The embedded application is gone. Destroy the container window. */ Tk_DestroyWindow((Tk_Window) winPtr); } Tk_DeleteErrorHandler(errHandler); } /* *---------------------------------------------------------------------- * * EmbedStructureProc -- * * This function is invoked by the Tk event dispatcher when a container * window owned by this application gets resized (and also at several * other times that we don't care about). This function reflects the size * change in the embedded window that corresponds to the container. * * Results: * None. * * Side effects: * The embedded window gets resized to match the container. * *---------------------------------------------------------------------- */ static void EmbedStructureProc( ClientData clientData, /* Token for container window. */ XEvent *eventPtr) /* ResizeRequest event. */ { Container *containerPtr = (Container *) clientData; Tk_ErrorHandler errHandler; if (eventPtr->type == ConfigureNotify) { if (containerPtr->wrapper != None) { /* * Ignore errors, since the embedded application could have * deleted its window. */ errHandler = Tk_CreateErrorHandler(eventPtr->xfocus.display, -1, -1, -1, NULL, (ClientData) NULL); XMoveResizeWindow(eventPtr->xconfigure.display, containerPtr->wrapper, 0, 0, (unsigned) Tk_Width((Tk_Window) containerPtr->parentPtr), (unsigned) Tk_Height((Tk_Window) containerPtr->parentPtr)); Tk_DeleteErrorHandler(errHandler); } } else if (eventPtr->type == DestroyNotify) { EmbedWindowDeleted(containerPtr->parentPtr); } } /* *---------------------------------------------------------------------- * * EmbedFocusProc -- * * This function 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 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, NULL, (ClientData) NULL); XSetInputFocus(display, containerPtr->wrapper, RevertToParent, CurrentTime); Tk_DeleteErrorHandler(errHandler); } } } /* *---------------------------------------------------------------------- * * EmbedGeometryRequest -- * * This function 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( Container *containerPtr, /* Information about the embedding. */ int width, int 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 function synthesizes a ConfigureNotify event to notify an * embedded application of its current size and location. This function * 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( 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) winPtr->changes.width, (unsigned) winPtr->changes.height); } } /* *---------------------------------------------------------------------- * * TkpGetOtherWindow -- * * If both the container and embedded window are in the same process, * this function 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( TkWindow *winPtr) /* Tk's structure for a container or embedded * window. */ { Container *containerPtr; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); for (containerPtr = tsdPtr->firstContainerPtr; containerPtr != NULL; containerPtr = containerPtr->nextPtr) { if (containerPtr->embeddedPtr == winPtr) { return containerPtr->parentPtr; } else if (containerPtr->parentPtr == winPtr) { return containerPtr->embeddedPtr; } } return NULL; } /* *---------------------------------------------------------------------- * * TkpRedirectKeyEvent -- * * This function 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 function'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( 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; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); /* * 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_HIERARCHY) { 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 = tsdPtr->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 function 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( 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; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); if (!(topLevelPtr->flags & TK_EMBEDDED)) { return; } for (containerPtr = tsdPtr->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 function 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 clientData, /* Main window for application. */ Tcl_Interp *interp, /* Current interpreter. */ int argc, /* Number of arguments. */ CONST char **argv) /* Argument strings. */ { int all; Container *containerPtr; Tcl_DString dString; char buffer[50]; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); if ((argc > 1) && (strcmp(argv[1], "all") == 0)) { all = 1; } else { all = 0; } Tcl_DStringInit(&dString); for (containerPtr = tsdPtr->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 function 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( TkWindow *winPtr) /* Tk's information about window that was * deleted. */ { Container *containerPtr, *prevPtr; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); /* * Find the Container structure for this window work. Delete the * information about the embedded application and free the container's * record. */ prevPtr = NULL; containerPtr = tsdPtr->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) { tsdPtr->firstContainerPtr = containerPtr->nextPtr; } else { prevPtr->nextPtr = containerPtr->nextPtr; } ckfree((char *) containerPtr); } } /* *---------------------------------------------------------------------- * * TkUnixContainerId -- * * Given an embedded window, this function 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( TkWindow *winPtr) /* Tk's structure for an embedded window. */ { Container *containerPtr; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); for (containerPtr = tsdPtr->firstContainerPtr; containerPtr != NULL; containerPtr = containerPtr->nextPtr) { if (containerPtr->embeddedPtr == winPtr) { return containerPtr->parent; } } Tcl_Panic("TkUnixContainerId couldn't find window"); return None; } /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */