/* * tkMacOSXEmbed.c -- * * This file contains platform-specific procedures for theMac to provide * basic operations needed for application embedding (where one * application can use as its main window an internal window from some * other application). Currently only Toplevel embedding within the same * Tk application is allowed on the Macintosh. * * Copyright (c) 1996-1997 Sun Microsystems, Inc. * Copyright 2001, Apple Computer, Inc. * Copyright (c) 2006-2008 Daniel A. Steffen * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tkMacOSXEmbed.c,v 1.16.2.2 2008/06/19 00:14:21 das Exp $ */ #include "tkMacOSXInt.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; /* The Mac Drawable for the parent of the pair * (the container). */ TkWindow *parentPtr; /* Tk's information about the container, or * NULL if the container isn't in this * process. */ Window embedded; /* The MacDrawable 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. */ struct Container *nextPtr; /* Next in list of all containers in this * process. */ } Container; static Container *firstContainerPtr = NULL; /* First in list of all containers managed by * this process. */ /* * Globals defined in this file: */ TkMacOSXEmbedHandler *tkMacOSXEmbedHandler = NULL; /* * Prototypes for static procedures defined in this file: */ static void ContainerEventProc(ClientData clientData, XEvent *eventPtr); static void EmbeddedEventProc(ClientData clientData, XEvent *eventPtr); static void EmbedActivateProc(ClientData clientData, XEvent *eventPtr); 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); /* *---------------------------------------------------------------------- * * Tk_MacOSXSetEmbedHandler -- * * Registers a handler for an in process form of embedding, like Netscape * plugins, where Tk is loaded into the process, but does not control the * main window * * Results: * None * * Side effects: * The embed handler is set. * *---------------------------------------------------------------------- */ void Tk_MacOSXSetEmbedHandler( Tk_MacOSXEmbedRegisterWinProc *registerWinProc, Tk_MacOSXEmbedGetGrafPortProc *getPortProc, Tk_MacOSXEmbedMakeContainerExistProc *containerExistProc, Tk_MacOSXEmbedGetClipProc *getClipProc, Tk_MacOSXEmbedGetOffsetInParentProc *getOffsetProc) { if (tkMacOSXEmbedHandler == NULL) { tkMacOSXEmbedHandler = (TkMacOSXEmbedHandler *) ckalloc(sizeof(TkMacOSXEmbedHandler)); } tkMacOSXEmbedHandler->registerWinProc = registerWinProc; tkMacOSXEmbedHandler->getPortProc = getPortProc; tkMacOSXEmbedHandler->containerExistProc = containerExistProc; tkMacOSXEmbedHandler->getClipProc = getClipProc; tkMacOSXEmbedHandler->getOffsetProc = getOffsetProc; } /* *---------------------------------------------------------------------- * * TkpMakeWindow -- * * Creates an X Window (Mac subwindow). * * Results: * The window id is returned. * * Side effects: * None. * *---------------------------------------------------------------------- */ Window TkpMakeWindow( TkWindow *winPtr, Window parent) { MacDrawable *macWin; /* * If this window is marked as embedded then the window structure should * have already been created in the TkpUseWindow function. */ if (Tk_IsEmbedded(winPtr)) { macWin = winPtr->privatePtr; } else { /* * Allocate sub window */ macWin = (MacDrawable *) ckalloc(sizeof(MacDrawable)); if (macWin == NULL) { winPtr->privatePtr = NULL; return None; } macWin->winPtr = winPtr; winPtr->privatePtr = macWin; macWin->visRgn = NULL; macWin->aboveVisRgn = NULL; macWin->drawRect = CGRectNull; macWin->referenceCount = 0; macWin->flags = TK_CLIP_INVALID; macWin->grafPtr = NULL; macWin->context = NULL; macWin->size = CGSizeZero; if (Tk_IsTopLevel(macWin->winPtr)) { /* * This will be set when we are mapped. */ macWin->xOff = 0; macWin->yOff = 0; macWin->toplevel = macWin; } else { macWin->xOff = winPtr->parentPtr->privatePtr->xOff + winPtr->parentPtr->changes.border_width + winPtr->changes.x; macWin->yOff = winPtr->parentPtr->privatePtr->yOff + winPtr->parentPtr->changes.border_width + winPtr->changes.y; macWin->toplevel = winPtr->parentPtr->privatePtr->toplevel; } macWin->toplevel->referenceCount++; } return (Window) macWin; } /* *---------------------------------------------------------------------- * * TkpUseWindow -- * * This procedure 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: * None. * *---------------------------------------------------------------------- */ 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; MacDrawable *parent, *macWin; Container *containerPtr; if (winPtr->window != None) { Tcl_AppendResult(interp, "can't modify container after widget is " "created", NULL); return TCL_ERROR; } /* * Decode the container pointer, and look for it among the list of * available containers. * * N.B. For now, we are limiting the containers to be in the same Tk * application as tkwin, since otherwise they would not be in our list of * containers. */ if (Tcl_GetInt(interp, string, (int*) &parent) != TCL_OK) { return TCL_ERROR; } usePtr = (TkWindow *) Tk_IdToWindow(winPtr->display, (Window) 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; } } /* * The code below can probably be simplified given we have already * discovered 'usePtr' above. */ /* * Save information about the container and the embedded window in a * Container structure. Currently, there must already be an existing * Container structure, since we only allow the case where both container * and embedded app. are in the same process. */ for (containerPtr = firstContainerPtr; containerPtr != NULL; containerPtr = containerPtr->nextPtr) { if (containerPtr->parent == (Window) parent) { winPtr->flags |= TK_BOTH_HALVES; containerPtr->parentPtr->flags |= TK_BOTH_HALVES; break; } } /* * Make the embedded window. */ macWin = (MacDrawable *) ckalloc(sizeof(MacDrawable)); if (macWin == NULL) { winPtr->privatePtr = NULL; return TCL_ERROR; } macWin->winPtr = winPtr; winPtr->privatePtr = macWin; /* * The grafPtr will be NULL for a Tk in Tk embedded window. It is none of * our business what it is for a Tk not in Tk embedded window, but we will * initialize it to NULL, and let the registerWinProc set it. In any case, * you must always use TkMacOSXGetDrawablePort to get the portPtr. It will * correctly find the container's port. */ macWin->grafPtr = NULL; macWin->context = NULL; macWin->size = CGSizeZero; macWin->visRgn = NULL; macWin->aboveVisRgn = NULL; macWin->drawRect = CGRectNull; macWin->referenceCount = 0; macWin->flags = TK_CLIP_INVALID; macWin->toplevel = macWin; macWin->toplevel->referenceCount++; winPtr->flags |= TK_EMBEDDED; /* * Make a copy of the TK_EMBEDDED flag, since sometimes we need this to * get the port after the TkWindow structure has been freed. */ macWin->flags |= TK_EMBEDDED; /* * Now check whether it is embedded in another Tk widget. If not (the * first case below) we see if there is an in-process embedding handler * registered, and if so, let that fill in the rest of the macWin. */ if (containerPtr == NULL) { /* * If someone has registered an in process embedding handler, then * see if it can handle this window... */ if (tkMacOSXEmbedHandler == NULL || tkMacOSXEmbedHandler->registerWinProc((int) parent, (Tk_Window) winPtr) != TCL_OK) { Tcl_AppendResult(interp, "The window ID ", string, " does not correspond to a valid Tk Window.", NULL); return TCL_ERROR; } else { containerPtr = (Container *) ckalloc(sizeof(Container)); containerPtr->parentPtr = NULL; containerPtr->embedded = (Window) macWin; containerPtr->embeddedPtr = macWin->winPtr; containerPtr->nextPtr = firstContainerPtr; firstContainerPtr = containerPtr; } } else { /* * The window is embedded in another Tk window. */ macWin->xOff = parent->winPtr->privatePtr->xOff + parent->winPtr->changes.border_width + winPtr->changes.x; macWin->yOff = parent->winPtr->privatePtr->yOff + parent->winPtr->changes.border_width + winPtr->changes.y; /* * Finish filling up the container structure with the embedded * window's information. */ containerPtr->embedded = (Window) macWin; containerPtr->embeddedPtr = macWin->winPtr; /* * Create an event handler to clean up the Container structure when * tkwin is eventually deleted. */ Tk_CreateEventHandler(tkwin, StructureNotifyMask, EmbeddedEventProc, winPtr); } return TCL_OK; } /* *---------------------------------------------------------------------- * * TkpMakeContainer -- * * This procedure 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; /* * Register the window as a container so that, for example, we can make * sure the argument to -use is valid. */ Tk_MakeWindowExist(tkwin); containerPtr = (Container *) ckalloc(sizeof(Container)); containerPtr->parent = Tk_WindowId(tkwin); containerPtr->parentPtr = winPtr; containerPtr->embedded = None; containerPtr->embeddedPtr = NULL; containerPtr->nextPtr = firstContainerPtr; 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. Also, pass activate events from the container down to the * embedded toplevel. */ Tk_CreateEventHandler(tkwin, SubstructureNotifyMask|SubstructureRedirectMask, ContainerEventProc, winPtr); Tk_CreateEventHandler(tkwin, StructureNotifyMask, EmbedStructureProc, containerPtr); Tk_CreateEventHandler(tkwin, ActivateMask, EmbedActivateProc, containerPtr); Tk_CreateEventHandler(tkwin, FocusChangeMask, EmbedFocusProc, containerPtr); } /* *---------------------------------------------------------------------- * * TkMacOSXContainerId -- * * Given an embedded window, this procedure returns the MacDrawable * identifier for the associated container window. * * Results: * The return value is the MacDrawable for winPtr's container window. * * Side effects: * None. * *---------------------------------------------------------------------- */ MacDrawable * TkMacOSXContainerId( TkWindow *winPtr) /* Tk's structure for an embedded window. */ { Container *containerPtr; for (containerPtr = firstContainerPtr; containerPtr != NULL; containerPtr = containerPtr->nextPtr) { if (containerPtr->embeddedPtr == winPtr) { return (MacDrawable *) containerPtr->parent; } } Tcl_Panic("TkMacOSXContainerId couldn't find window"); return None; } /* *---------------------------------------------------------------------- * * TkMacOSXGetHostToplevel -- * * Given the TkWindow, return the MacDrawable for the outermost toplevel * containing it. This will be a real Macintosh window. * * Results: * Returns a MacDrawable corresponding to a Macintosh Toplevel * * Side effects: * None. * *---------------------------------------------------------------------- */ MacDrawable * TkMacOSXGetHostToplevel( TkWindow *winPtr) /* Tk's structure for a window. */ { TkWindow *contWinPtr, *topWinPtr; topWinPtr = winPtr->privatePtr->toplevel->winPtr; if (!Tk_IsEmbedded(topWinPtr)) { return winPtr->privatePtr->toplevel; } contWinPtr = TkpGetOtherWindow(topWinPtr); /* * TODO: Here we should handle out of process embedding. */ if (contWinPtr == NULL) { return None; } return TkMacOSXGetHostToplevel(contWinPtr); } /* *---------------------------------------------------------------------- * * TkpClaimFocus -- * * This procedure is invoked when someone asks for 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; 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; Tk_QueueWindowEvent(&event,TCL_QUEUE_TAIL); } /* *---------------------------------------------------------------------- * * 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 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]; 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->embedded == None) { Tcl_DStringAppendElement(&dString, ""); } else if (all) { sprintf(buffer, "0x%x", (int) containerPtr->embedded); 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; } /* *---------------------------------------------------------------------- * * 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( TkWindow *winPtr, /* Window to which the event was originally * reported. */ XEvent *eventPtr) /* X event to redirect (should be KeyPress or * KeyRelease). */ { } /* *---------------------------------------------------------------------- * * 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( TkWindow *winPtr) /* Tk's structure for a container or embedded * window. */ { Container *containerPtr; /* * TkpGetOtherWindow returns NULL if both windows are not in the same * process... */ if (!(winPtr->flags & TK_BOTH_HALVES)) { return NULL; } for (containerPtr = firstContainerPtr; containerPtr != NULL; containerPtr = containerPtr->nextPtr) { if (containerPtr->embeddedPtr == winPtr) { return containerPtr->parentPtr; } else if (containerPtr->parentPtr == winPtr) { return containerPtr->embeddedPtr; } } return NULL; } /* *---------------------------------------------------------------------- * * EmbeddedEventProc -- * * This procedure 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 = clientData; if (eventPtr->type == DestroyNotify) { EmbedWindowDeleted(winPtr); } } /* *---------------------------------------------------------------------- * * ContainerEventProc -- * * This procedure 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. * * NOTE: on the Mac, only the DestroyNotify branch is ever taken. We * don't synthesize the other events. * * 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 = clientData; Container *containerPtr; Tk_ErrorHandler errHandler; /* * Ignore any X protocol errors that happen in this procedure (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, NULL); /* * Find the Container structure associated with the parent window. */ for (containerPtr = 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). */ containerPtr->embedded = eventPtr->xcreatewindow.window; } 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 procedure 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 procedure 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 = clientData; Tk_ErrorHandler errHandler; if (eventPtr->type == ConfigureNotify) { if (containerPtr->embedded != None) { /* * Ignore errors, since the embedded application could have * deleted its window. */ errHandler = Tk_CreateErrorHandler(eventPtr->xfocus.display, -1, -1, -1, NULL, NULL); Tk_MoveResizeWindow((Tk_Window) containerPtr->embeddedPtr, 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); } } /* *---------------------------------------------------------------------- * * EmbedActivateProc -- * * This procedure is invoked by the Tk event dispatcher when Activate and * Deactivate events occur for a container window owned by this * application. It is responsible for forwarding an activate event down * into the embedded toplevel. * * Results: * None. * * Side effects: * The X focus may change. * *---------------------------------------------------------------------- */ static void EmbedActivateProc( ClientData clientData, /* Token for container window. */ XEvent *eventPtr) /* ResizeRequest event. */ { Container *containerPtr = clientData; if (containerPtr->embeddedPtr != NULL) { if (eventPtr->type == ActivateNotify) { TkGenerateActivateEvents(containerPtr->embeddedPtr,1); } else if (eventPtr->type == DeactivateNotify) { TkGenerateActivateEvents(containerPtr->embeddedPtr,0); } } } /* *---------------------------------------------------------------------- * * 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 clientData, /* Token for container window. */ XEvent *eventPtr) /* ResizeRequest event. */ { Container *containerPtr = clientData; Display *display; XEvent event; if (containerPtr->embeddedPtr != NULL) { display = Tk_Display(containerPtr->parentPtr); event.xfocus.serial = LastKnownRequestProcessed(display); event.xfocus.send_event = false; event.xfocus.display = display; event.xfocus.mode = NotifyNormal; event.xfocus.window = containerPtr->embedded; 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). */ event.xfocus.detail = NotifyNonlinear; event.xfocus.type = FocusIn; } else if (eventPtr->type == FocusOut) { /* * When the container gets a FocusOut event, it has to tell the * embedded app that it has lost the focus. */ event.xfocus.type = FocusOut; event.xfocus.detail = NotifyNonlinear; } Tk_QueueWindowEvent(&event, TCL_QUEUE_MARK); } } /* *---------------------------------------------------------------------- * * 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. * * NOTE: On the Mac, this is a stub, since we don't synthesize * ConfigureRequest events. * * 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 is currently a stub. It is called 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. It is a response to ConfigureRequest events, which * we do not currently synthesize on the Mac * * Results: * None. * * Side effects: * None. * *---------------------------------------------------------------------- */ static void EmbedSendConfigure( Container *containerPtr) /* Information about the embedding. */ { } /* *---------------------------------------------------------------------- * * 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( TkWindow *winPtr) /* Tk's information about window that * was deleted. */ { Container *containerPtr, *prevPtr; /* * Find the Container structure for this window. Delete the information * about the embedded application and free the container's record. */ prevPtr = NULL; containerPtr = firstContainerPtr; while (1) { if (containerPtr->embeddedPtr == winPtr) { /* * We also have to destroy our parent, to clean up the container. * Fabricate an event to do this. */ if (containerPtr->parentPtr != NULL && containerPtr->parentPtr->flags & TK_BOTH_HALVES) { XEvent event; event.xany.serial = Tk_Display(containerPtr->parentPtr)->request; event.xany.send_event = False; event.xany.display = Tk_Display(containerPtr->parentPtr); event.xany.type = DestroyNotify; event.xany.window = containerPtr->parent; event.xdestroywindow.event = containerPtr->parent; Tk_QueueWindowEvent(&event, TCL_QUEUE_HEAD); } containerPtr->embedded = 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); } }