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Diffstat (limited to 'mac/tkMacEmbed.c')
| -rw-r--r-- | mac/tkMacEmbed.c | 1116 |
1 files changed, 1116 insertions, 0 deletions
diff --git a/mac/tkMacEmbed.c b/mac/tkMacEmbed.c new file mode 100644 index 0000000..7a73b54 --- /dev/null +++ b/mac/tkMacEmbed.c @@ -0,0 +1,1116 @@ +/* + * tkMacEmbed.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) 1996-97 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: @(#) tkMacEmbed.c 1.6 97/10/31 17:20:22 + */ + +#include "tkInt.h" +#include "tkPort.h" +#include "X.h" +#include "Xlib.h" +#include <stdio.h> + +#include <Windows.h> +#include <QDOffscreen.h> +#include "tkMacInt.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. */ + +/* + * Prototypes for static procedures defined in this file: + */ + +static void ContainerEventProc _ANSI_ARGS_(( + ClientData clientData, XEvent *eventPtr)); +static void EmbeddedEventProc _ANSI_ARGS_(( + ClientData clientData, XEvent *eventPtr)); +static void EmbedActivateProc _ANSI_ARGS_((ClientData clientData, + XEvent *eventPtr)); +static void EmbedFocusProc _ANSI_ARGS_((ClientData clientData, + XEvent *eventPtr)); +static void EmbedGeometryRequest _ANSI_ARGS_(( + Container * containerPtr, int width, int height)); +static void EmbedSendConfigure _ANSI_ARGS_(( + Container *containerPtr)); +static void EmbedStructureProc _ANSI_ARGS_((ClientData clientData, + XEvent *eventPtr)); +static void EmbedWindowDeleted _ANSI_ARGS_((TkWindow *winPtr)); + +/* WARNING - HACK */ +static void GenerateFocusEvents _ANSI_ARGS_((TkWindow *sourcePtr, + TkWindow *destPtr)); + + +/* + *---------------------------------------------------------------------- + * + * TkpMakeWindow -- + * + * Creates an X Window (Mac subwindow). + * + * Results: + * The window id is returned. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +Window +TkpMakeWindow( + TkWindow *winPtr, + Window parent) +{ + MacDrawable *macWin; + XEvent event; + + /* + * If this window is marked as embedded then + * the window structure should have already been + * created in the TkpUseWindow function. + */ + + if (Tk_IsEmbedded(winPtr)) { + return (Window) winPtr->privatePtr; + } + + /* + * Allocate sub window + */ + + macWin = (MacDrawable *) ckalloc(sizeof(MacDrawable)); + if (macWin == NULL) { + winPtr->privatePtr = NULL; + return None; + } + macWin->winPtr = winPtr; + winPtr->privatePtr = macWin; + macWin->clipRgn = NewRgn(); + macWin->aboveClipRgn = NewRgn(); + macWin->referenceCount = 0; + macWin->flags = TK_CLIP_INVALID; + + if (Tk_IsTopLevel(macWin->winPtr)) { + + /* + *This will be set when we are mapped. + */ + + macWin->portPtr = (GWorldPtr) NULL; + macWin->toplevel = macWin; + macWin->xOff = 0; + macWin->yOff = 0; + } else { + macWin->portPtr = NULL; + 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++; + + /* + * TODO: need general solution for visibility events. + */ + event.xany.serial = Tk_Display(winPtr)->request; + event.xany.send_event = False; + event.xany.display = Tk_Display(winPtr); + + event.xvisibility.type = VisibilityNotify; + event.xvisibility.window = (Window) macWin;; + event.xvisibility.state = VisibilityUnobscured; + Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL); + + 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 interp->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. */ + char *string) /* String identifying an X window to use + * for tkwin; must be an integer value. */ +{ + TkWindow *winPtr = (TkWindow *) tkwin; + MacDrawable *parent, *macWin; + Container *containerPtr; + XEvent event; + int result; + + if (winPtr->window != None) { + panic("TkpUseWindow: X window already assigned"); + } + + /* + * 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, &result) != TCL_OK) { + return TCL_ERROR; + } + + parent = (MacDrawable *) result; + + /* + * 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; + } + } + + /* + * We should not get to this code until we start to allow + * embedding in other applications. + */ + + if (containerPtr == NULL) { + Tcl_AppendResult(interp, "The window ID ", string, + " does not correspond to a valid Tk Window.", + (char *) NULL); + return TCL_ERROR; + } + + /* + * Make the embedded window. + */ + + macWin = (MacDrawable *) ckalloc(sizeof(MacDrawable)); + if (macWin == NULL) { + winPtr->privatePtr = NULL; + return TCL_ERROR; + } + + macWin->winPtr = winPtr; + winPtr->privatePtr = macWin; + macWin->clipRgn = NewRgn(); + macWin->aboveClipRgn = NewRgn(); + macWin->referenceCount = 0; + macWin->flags = TK_CLIP_INVALID; + + 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; + + /* + * The portPtr will be NULL for an embedded window. + * Always use TkMacGetDrawablePort to get the portPtr. + * It will correctly find the container's port. + */ + + macWin->portPtr = (GWorldPtr) NULL; + + macWin->toplevel = macWin; + 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; + + macWin->toplevel->referenceCount++; + + /* + * Finish filling up the container structure with the embedded window's + * information. + */ + + containerPtr->embedded = (Window) macWin; + containerPtr->embeddedPtr = macWin->winPtr; + + /* + * TODO: need general solution for visibility events. + */ + + event.xany.serial = Tk_Display(winPtr)->request; + event.xany.send_event = False; + event.xany.display = Tk_Display(winPtr); + + event.xvisibility.type = VisibilityNotify; + event.xvisibility.window = (Window) macWin;; + event.xvisibility.state = VisibilityUnobscured; + Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL); + + /* + * Create an event handler to clean up the Container structure when + * tkwin is eventually deleted. + */ + + Tk_CreateEventHandler(tkwin, StructureNotifyMask, EmbeddedEventProc, + (ClientData) 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, (ClientData) winPtr); + Tk_CreateEventHandler(tkwin, StructureNotifyMask, EmbedStructureProc, + (ClientData) containerPtr); + Tk_CreateEventHandler(tkwin, ActivateMask, EmbedActivateProc, + (ClientData) containerPtr); + Tk_CreateEventHandler(tkwin, FocusChangeMask, EmbedFocusProc, + (ClientData) containerPtr); + +} + +/* + *---------------------------------------------------------------------- + * + * TkMacContainerId -- + * + * 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 * +TkMacContainerId(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 (MacDrawable *) containerPtr->parent; + } + } + panic("TkMacContainerId couldn't find window"); + return None; +} + +/* + *---------------------------------------------------------------------- + * + * TkMacGetHostToplevel -- + * + * 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 * +TkMacGetHostToplevel( + TkWindow *winPtr) /* Tk's structure for a window. */ +{ + TkWindow *contWinPtr, *topWinPtr; + + topWinPtr = winPtr->privatePtr->toplevel->winPtr; + if (!Tk_IsEmbedded(topWinPtr)) { + return winPtr->privatePtr->toplevel; + } else { + contWinPtr = TkpGetOtherWindow(topWinPtr); + + /* + * NOTE: Here we should handle out of process embedding. + */ + + if (contWinPtr != NULL) { + return TkMacGetHostToplevel(contWinPtr); + } else { + return None; + } + } +} + +/* + *---------------------------------------------------------------------- + * + * 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. */ + 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, eventPtr) + ClientData clientData; /* Token for container window. */ + XEvent *eventPtr; /* ResizeRequest event. */ +{ + TkWindow *winPtr = (TkWindow *) 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, eventPtr) + ClientData clientData; /* Token for container window. */ + XEvent *eventPtr; /* ResizeRequest event. */ +{ + TkWindow *winPtr = (TkWindow *) 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, (Tk_ErrorProc *) NULL, (ClientData) NULL); + + /* + * Find the Container structure associated with the parent window. + */ + + for (containerPtr = firstContainerPtr; + containerPtr->parent != eventPtr->xmaprequest.parent; + containerPtr = containerPtr->nextPtr) { + if (containerPtr == NULL) { + 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, eventPtr) + ClientData clientData; /* Token for container window. */ + XEvent *eventPtr; /* ResizeRequest event. */ +{ + Container *containerPtr = (Container *) 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, (Tk_ErrorProc *) NULL, (ClientData) NULL); + Tk_MoveResizeWindow((Tk_Window) containerPtr->embeddedPtr, 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); + } +} + +/* + *---------------------------------------------------------------------- + * + * 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, eventPtr) + ClientData clientData; /* Token for container window. */ + XEvent *eventPtr; /* ResizeRequest event. */ +{ + Container *containerPtr = (Container *) 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, eventPtr) + ClientData clientData; /* Token for container window. */ + XEvent *eventPtr; /* ResizeRequest event. */ +{ + Container *containerPtr = (Container *) 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(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 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(containerPtr) + 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(winPtr) + 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); + } +} + |