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- /*
- * tkWinEmbed.c --
- *
- * This file contains platform specific procedures for Windows platforms
- * to provide basic operations needed for application embedding (where
- * one application can use as its main window an internal window from
- * another application).
- *
- * Copyright (c) 1996 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: @(#) tkWinEmbed.c 1.19 97/08/11 09:49:01;
- */
-
- #include "tkWinInt.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 {
- HWND parentHWnd; /* Windows HWND to the parent window */
- TkWindow *parentPtr; /* Tk's information about the container,
- * or NULL if the container isn't
- * in this process. */
- HWND embeddedHWnd; /* Windows HWND to the embedded window */
- 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. */
-
- static void CleanupContainerList _ANSI_ARGS_((
- ClientData clientData));
- static void ContainerEventProc _ANSI_ARGS_((ClientData clientData,
- XEvent *eventPtr));
- static void EmbedGeometryRequest _ANSI_ARGS_((
- Container*containerPtr, int width, int height));
- static void EmbedWindowDeleted _ANSI_ARGS_((HWND hwnd));
-
- /*
- *----------------------------------------------------------------------
- *
- * CleanupContainerList --
- *
- * Finalizes the list of containers.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Releases memory occupied by containers of embedded windows.
- *
- *----------------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static void
- CleanupContainerList(clientData)
- ClientData clientData;
- {
- Container *nextPtr;
-
- for (;
- firstContainerPtr != (Container *) NULL;
- firstContainerPtr = nextPtr) {
- nextPtr = firstContainerPtr->nextPtr;
- ckfree((char *) firstContainerPtr);
- }
- firstContainerPtr = (Container *) NULL;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TkpTestembedCmd --
- *
- * Test command for the embedding facility.
- *
- * Results:
- * Always returns TCL_OK.
- *
- * Side effects:
- * Currently it does not do anything.
- *
- *----------------------------------------------------------------------
- */
-
- /* ARGSUSED */
- int
- TkpTestembedCmd(clientData, interp, argc, argv)
- ClientData clientData;
- Tcl_Interp *interp;
- int argc;
- char **argv;
- {
- return TCL_OK;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TkpUseWindow --
- *
- * This procedure causes a Tk window to use a given Windows handle
- * for a window as its underlying window, rather than a new Windows
- * window being created automatically. It is invoked by an embedded
- * application to specify the window in which the application is
- * embedded.
- *
- * Results:
- * The return value is normally TCL_OK. If an error occurred (such as
- * if the argument does not identify a legal Windows window handle),
- * the return value is TCL_ERROR and an error message is left in the
- * interp->result if interp is not NULL.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- int
- TkpUseWindow(interp, tkwin, string)
- 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;
- int id;
- HWND hwnd;
- Container *containerPtr;
-
- if (winPtr->window != None) {
- panic("TkpUseWindow: Already assigned a window");
- }
-
- if (Tcl_GetInt(interp, string, &id) != TCL_OK) {
- return TCL_ERROR;
- }
- hwnd = (HWND) id;
-
- /*
- * Check if the window is a valid handle. If it is invalid, return
- * TCL_ERROR and potentially leave an error message in interp->result.
- */
-
- if (!IsWindow(hwnd)) {
- if (interp != (Tcl_Interp *) NULL) {
- Tcl_AppendResult(interp, "window \"", string,
- "\" doesn't exist", (char *) NULL);
- }
- return TCL_ERROR;
- }
-
- /*
- * Store the parent window in the platform private data slot so
- * TkWmMapWindow can use it when creating the wrapper window.
- */
-
- winPtr->privatePtr = (struct TkWindowPrivate*) hwnd;
-
- /*
- * If this is the first container, register an exit handler so that
- * things will get cleaned up at finalization.
- */
-
- if (firstContainerPtr == (Container *) NULL) {
- Tcl_CreateExitHandler(CleanupContainerList, (ClientData) NULL);
- }
-
- /*
- * 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 = firstContainerPtr; containerPtr != NULL;
- containerPtr = containerPtr->nextPtr) {
- if (containerPtr->parentHWnd == hwnd) {
- winPtr->flags |= TK_BOTH_HALVES;
- containerPtr->parentPtr->flags |= TK_BOTH_HALVES;
- break;
- }
- }
- if (containerPtr == NULL) {
- containerPtr = (Container *) ckalloc(sizeof(Container));
- containerPtr->parentPtr = NULL;
- containerPtr->parentHWnd = hwnd;
- containerPtr->nextPtr = firstContainerPtr;
- firstContainerPtr = containerPtr;
- }
-
- /*
- * embeddedHWnd is not created yet. It will be created by TkWmMapWindow(),
- * which will send a TK_ATTACHWINDOW to the container window.
- * TkWinEmbeddedEventProc will process this message and set the embeddedHWnd
- * variable
- */
-
- containerPtr->embeddedPtr = winPtr;
- containerPtr->embeddedHWnd = NULL;
-
- winPtr->flags |= TK_EMBEDDED;
- winPtr->flags &= (~(TK_MAPPED));
-
- 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(tkwin)
- Tk_Window tkwin;
- {
- TkWindow *winPtr = (TkWindow *) tkwin;
- Container *containerPtr;
-
- /*
- * If this is the first container, register an exit handler so that
- * things will get cleaned up at finalization.
- */
-
- if (firstContainerPtr == (Container *) NULL) {
- Tcl_CreateExitHandler(CleanupContainerList, (ClientData) NULL);
- }
-
- /*
- * 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->parentPtr = winPtr;
- containerPtr->parentHWnd = Tk_GetHWND(Tk_WindowId(tkwin));
- containerPtr->embeddedHWnd = NULL;
- containerPtr->embeddedPtr = NULL;
- containerPtr->nextPtr = firstContainerPtr;
- firstContainerPtr = containerPtr;
- winPtr->flags |= TK_CONTAINER;
-
- /*
- * Unlike in tkUnixEmbed.c, we don't make any requests for events
- * in the embedded window here. Now we just allow the embedding
- * of another TK application into TK windows. When the embedded
- * window makes a request, that will be done by sending to the
- * container window a WM_USER message, which will be intercepted
- * by TkWinContainerProc.
- *
- * We need to get structure events of the container itself, though.
- */
-
- Tk_CreateEventHandler(tkwin, StructureNotifyMask,
- ContainerEventProc, (ClientData) containerPtr);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TkWinEmbeddedEventProc --
- *
- * 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.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Depends on the event. For example, when ConfigureRequest events
- * occur, geometry information gets set for the container window.
- *
- *----------------------------------------------------------------------
- */
-
- LRESULT
- TkWinEmbeddedEventProc(hwnd, message, wParam, lParam)
- HWND hwnd;
- UINT message;
- WPARAM wParam;
- LPARAM lParam;
- {
- Container *containerPtr;
-
- /*
- * Find the Container structure associated with the parent window.
- */
-
- for (containerPtr = firstContainerPtr;
- containerPtr->parentHWnd != hwnd;
- containerPtr = containerPtr->nextPtr) {
- if (containerPtr == NULL) {
- panic("TkWinContainerProc couldn't find Container record");
- }
- }
-
- switch (message) {
- case TK_ATTACHWINDOW:
- /* An embedded window (either from this application or from
- * another application) is trying to attach to this container.
- * We attach it only if this container is not yet containing any
- * window.
- */
- if (containerPtr->embeddedHWnd == NULL) {
- containerPtr->embeddedHWnd = (HWND)wParam;
- } else {
- return 0;
- }
-
- break;
- case TK_GEOMETRYREQ:
- EmbedGeometryRequest(containerPtr, wParam, lParam);
- break;
- }
- return 1;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * EmbedGeometryRequest --
- *
- * This procedure is invoked when an embedded application requests
- * a particular size. It processes the request (which may or may
- * not actually resize the window) 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 that the size is the same
- * as it used to be. Events get processed while we're waiting for
- * the geometry managers to do their thing.
- *
- *----------------------------------------------------------------------
- */
-
- void
- EmbedGeometryRequest(containerPtr, width, height)
- Container *containerPtr; /* Information about the container window. */
- 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 even if we decide not to resize
- * the window; 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);
-
- if (containerPtr->embeddedHWnd != NULL) {
- while (Tcl_DoOneEvent(TCL_IDLE_EVENTS)) {
- /* Empty loop body. */
- }
-
- SetWindowPos(containerPtr->embeddedHWnd, NULL,
- 0, 0, winPtr->changes.width, winPtr->changes.height, SWP_NOZORDER);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * ContainerEventProc --
- *
- * This procedure is invoked by the Tk event dispatcher when
- * various useful events are received for the container window.
- *
- * 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. */
- {
- Container *containerPtr = (Container *)clientData;
- Tk_Window tkwin = (Tk_Window)containerPtr->parentPtr;
-
- if (eventPtr->type == ConfigureNotify) {
- if (containerPtr->embeddedPtr == NULL) {
- return;
- }
- /* Resize the embedded window, if there is any */
- if (containerPtr->embeddedHWnd) {
- SetWindowPos(containerPtr->embeddedHWnd, NULL,
- 0, 0, Tk_Width(tkwin), Tk_Height(tkwin), SWP_NOZORDER);
- }
- } else if (eventPtr->type == DestroyNotify) {
- /* The container is gone, delete the embedded window as well */
- EmbedWindowDeleted(containerPtr->parentHWnd);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * 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;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * 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. */
- {
- HWND hwnd = GetParent(Tk_GetHWND(topLevelPtr->window));
- SendMessage(hwnd, TK_CLAIMFOCUS, (WPARAM) force, 0);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * 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). */
- {
- /* not implemented */
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * 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(hwnd)
- HWND hwnd; /* Handle to the 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->embeddedHWnd == hwnd) {
- containerPtr->embeddedHWnd = NULL;
- containerPtr->embeddedPtr = NULL;
- break;
- }
- if (containerPtr->parentHWnd == hwnd) {
- 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);
- }
- }
-