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[/] [or1k/] [tags/] [start/] [insight/] [tk/] [unix/] [tkUnixEmbed.c] - Rev 579
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/* * tkUnixEmbed.c -- * * This file contains platform-specific procedures 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. * * RCS: @(#) $Id: tkUnixEmbed.c,v 1.1.1.1 2002-01-16 10:26:01 markom Exp $ */ #include "tkInt.h" #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; 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 int EmbedErrorProc _ANSI_ARGS_((ClientData clientData, XErrorEvent *errEventPtr)); 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)); /* *---------------------------------------------------------------------- * * 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: * Changes the colormap and other visual information to match that * of the parent window given by "string". * *---------------------------------------------------------------------- */ 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, anyError; Window parent; Tk_ErrorHandler handler; Container *containerPtr; XWindowAttributes parentAtts; if (winPtr->window != None) { panic("TkUseWindow: X window already assigned"); } if (Tcl_GetInt(interp, string, &id) != TCL_OK) { return TCL_ERROR; } parent = (Window) id; /* * 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, "\"", (char *) 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 = 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 = firstContainerPtr; 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(winPtr, parent) 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; 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 = firstContainerPtr; ; containerPtr = containerPtr->nextPtr) { if (containerPtr == NULL) { 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 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; /* 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 * 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 = 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. */ 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 procedure 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, errEventPtr) 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 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. * * 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). Also set the child's size to match the container. */ containerPtr->wrapper = eventPtr->xcreatewindow.window; XMoveResizeWindow(eventPtr->xcreatewindow.display, containerPtr->wrapper, 0, 0, (unsigned int) Tk_Width( (Tk_Window) containerPtr->parentPtr), (unsigned int) 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 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->wrapper != 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); XMoveResizeWindow(eventPtr->xconfigure.display, containerPtr->wrapper, 0, 0, (unsigned int) Tk_Width( (Tk_Window) containerPtr->parentPtr), (unsigned int) Tk_Height( (Tk_Window) containerPtr->parentPtr)); Tk_DeleteErrorHandler(errHandler); } } else if (eventPtr->type == DestroyNotify) { EmbedWindowDeleted(containerPtr->parentPtr); } } /* *---------------------------------------------------------------------- * * EmbedFocusProc -- * * This procedure is invoked by the Tk event dispatcher when * FocusIn and FocusOut events occur for a container window owned * by this application. It is responsible for moving the focus * back and forth between a container application and an embedded * application. * * Results: * None. * * Side effects: * The X focus may change. * *---------------------------------------------------------------------- */ static void EmbedFocusProc(clientData, eventPtr) ClientData clientData; /* Token for container window. */ XEvent *eventPtr; /* ResizeRequest event. */ { Container *containerPtr = (Container *) clientData; Tk_ErrorHandler errHandler; Display *display; display = Tk_Display(containerPtr->parentPtr); if (eventPtr->type == FocusIn) { /* * The focus just arrived at the container. Change the X focus * to move it to the embedded application, if there is one. * Ignore X errors that occur during this operation (it's * possible that the new focus window isn't mapped). */ if (containerPtr->wrapper != None) { errHandler = Tk_CreateErrorHandler(eventPtr->xfocus.display, -1, -1, -1, (Tk_ErrorProc *) NULL, (ClientData) NULL); XSetInputFocus(display, containerPtr->wrapper, RevertToParent, CurrentTime); Tk_DeleteErrorHandler(errHandler); } } } /* *---------------------------------------------------------------------- * * EmbedGeometryRequest -- * * This procedure is invoked when an embedded application requests * a particular size. It processes the request (which may or may * not actually honor the request) and reflects the results back * to the embedded application. * * Results: * None. * * Side effects: * If we deny the child's size change request, a Configure event * is synthesized to let the child know how big it ought to be. * Events get processed while we're waiting for the geometry * managers to do their thing. * *---------------------------------------------------------------------- */ static void EmbedGeometryRequest(containerPtr, width, height) Container *containerPtr; /* Information about the embedding. */ int width, height; /* Size that the child has requested. */ { TkWindow *winPtr = containerPtr->parentPtr; /* * Forward the requested size into our geometry management hierarchy * via the container window. We need to send a Configure event back * to the embedded application if we decide not to honor its * request; to make this happen, process all idle event handlers * synchronously here (so that the geometry managers have had a * chance to do whatever they want to do), and if the window's size * didn't change then generate a configure event. */ Tk_GeometryRequest((Tk_Window) winPtr, width, height); while (Tcl_DoOneEvent(TCL_IDLE_EVENTS)) { /* Empty loop body. */ } if ((winPtr->changes.width != width) || (winPtr->changes.height != height)) { EmbedSendConfigure(containerPtr); } } /* *---------------------------------------------------------------------- * * EmbedSendConfigure -- * * This procedure synthesizes a ConfigureNotify event to notify an * embedded application of its current size and location. This * procedure is called when the embedded application made a * geometry request that we did not grant, so that the embedded * application knows that its geometry didn't change after all. * * Results: * None. * * Side effects: * None. * *---------------------------------------------------------------------- */ static void EmbedSendConfigure(containerPtr) Container *containerPtr; /* Information about the embedding. */ { TkWindow *winPtr = containerPtr->parentPtr; XEvent event; event.xconfigure.type = ConfigureNotify; event.xconfigure.serial = LastKnownRequestProcessed(winPtr->display); event.xconfigure.send_event = True; event.xconfigure.display = winPtr->display; event.xconfigure.event = containerPtr->wrapper; event.xconfigure.window = containerPtr->wrapper; event.xconfigure.x = 0; event.xconfigure.y = 0; event.xconfigure.width = winPtr->changes.width; event.xconfigure.height = winPtr->changes.height; event.xconfigure.above = None; event.xconfigure.override_redirect = False; /* * Note: when sending the event below, the ButtonPressMask * causes the event to be sent only to applications that have * selected for ButtonPress events, which should be just the * embedded application. */ XSendEvent(winPtr->display, containerPtr->wrapper, False, 0, &event); /* * The following needs to be done if the embedded window is * not in the same application as the container window. */ if (containerPtr->embeddedPtr == NULL) { XMoveResizeWindow(winPtr->display, containerPtr->wrapper, 0, 0, (unsigned int) winPtr->changes.width, (unsigned int) winPtr->changes.height); } } /* *---------------------------------------------------------------------- * * TkpGetOtherWindow -- * * If both the container and embedded window are in the same * process, this procedure will return either one, given the other. * * Results: * If winPtr is a container, the return value is the token for the * embedded window, and vice versa. If the "other" window isn't in * this process, NULL is returned. * * Side effects: * None. * *---------------------------------------------------------------------- */ TkWindow * TkpGetOtherWindow(winPtr) TkWindow *winPtr; /* Tk's structure for a container or * embedded window. */ { Container *containerPtr; for (containerPtr = firstContainerPtr; containerPtr != NULL; containerPtr = containerPtr->nextPtr) { if (containerPtr->embeddedPtr == winPtr) { return containerPtr->parentPtr; } else if (containerPtr->parentPtr == winPtr) { return containerPtr->embeddedPtr; } } panic("TkpGetOtherWindow couldn't find window"); return NULL; } /* *---------------------------------------------------------------------- * * TkpRedirectKeyEvent -- * * This procedure is invoked when a key press or release event * arrives for an application that does not believe it owns the * input focus. This can happen because of embedding; for example, * X can send an event to an embedded application when the real * focus window is in the container application and is an ancestor * of the container. This procedure's job is to forward the event * back to the application where it really belongs. * * Results: * None. * * Side effects: * The event may get sent to a different application. * *---------------------------------------------------------------------- */ void TkpRedirectKeyEvent(winPtr, eventPtr) TkWindow *winPtr; /* Window to which the event was originally * reported. */ XEvent *eventPtr; /* X event to redirect (should be KeyPress * or KeyRelease). */ { Container *containerPtr; Window saved; /* * First, find the top-level window corresponding to winPtr. */ while (1) { if (winPtr == NULL) { /* * This window is being deleted. This is too confusing a * case to handle so discard the event. */ return; } if (winPtr->flags & TK_TOP_LEVEL) { break; } winPtr = winPtr->parentPtr; } if (winPtr->flags & TK_EMBEDDED) { /* * This application is embedded. If we got a key event without * officially having the focus, it means that the focus is * really in the container, but the mouse was over the embedded * application. Send the event back to the container. */ for (containerPtr = firstContainerPtr; containerPtr->embeddedPtr != winPtr; containerPtr = containerPtr->nextPtr) { /* Empty loop body. */ } saved = eventPtr->xkey.window; eventPtr->xkey.window = containerPtr->parent; XSendEvent(eventPtr->xkey.display, eventPtr->xkey.window, False, KeyPressMask|KeyReleaseMask, eventPtr); eventPtr->xkey.window = saved; } } /* *---------------------------------------------------------------------- * * TkpClaimFocus -- * * This procedure is invoked when someone asks or the input focus * to be put on a window in an embedded application, but the * application doesn't currently have the focus. It requests the * input focus from the container application. * * Results: * None. * * Side effects: * The input focus may change. * *---------------------------------------------------------------------- */ void TkpClaimFocus(topLevelPtr, force) TkWindow *topLevelPtr; /* Top-level window containing desired * focus window; should be embedded. */ int force; /* One means that the container should * claim the focus if it doesn't * currently have it. */ { XEvent event; Container *containerPtr; if (!(topLevelPtr->flags & TK_EMBEDDED)) { return; } for (containerPtr = firstContainerPtr; containerPtr->embeddedPtr != topLevelPtr; containerPtr = containerPtr->nextPtr) { /* Empty loop body. */ } event.xfocus.type = FocusIn; event.xfocus.serial = LastKnownRequestProcessed(topLevelPtr->display); event.xfocus.send_event = 1; event.xfocus.display = topLevelPtr->display; event.xfocus.window = containerPtr->parent; event.xfocus.mode = EMBEDDED_APP_WANTS_FOCUS; event.xfocus.detail = force; XSendEvent(event.xfocus.display, event.xfocus.window, False, 0, &event); } /* *---------------------------------------------------------------------- * * TkpTestembedCmd -- * * This procedure implements the "testembed" command. It returns * some or all of the information in the list pointed to by * firstContainerPtr. * * Results: * A standard Tcl result. * * Side effects: * None. * *---------------------------------------------------------------------- */ int TkpTestembedCmd(clientData, interp, argc, argv) ClientData clientData; /* Main window for application. */ Tcl_Interp *interp; /* Current interpreter. */ int argc; /* Number of arguments. */ char **argv; /* Argument strings. */ { int all; Container *containerPtr; Tcl_DString dString; char buffer[50]; if ((argc > 1) && (strcmp(argv[1], "all") == 0)) { all = 1; } else { all = 0; } Tcl_DStringInit(&dString); for (containerPtr = firstContainerPtr; containerPtr != NULL; containerPtr = containerPtr->nextPtr) { Tcl_DStringStartSublist(&dString); if (containerPtr->parent == None) { Tcl_DStringAppendElement(&dString, ""); } else { if (all) { sprintf(buffer, "0x%x", (int) containerPtr->parent); Tcl_DStringAppendElement(&dString, buffer); } else { Tcl_DStringAppendElement(&dString, "XXX"); } } if (containerPtr->parentPtr == NULL) { Tcl_DStringAppendElement(&dString, ""); } else { Tcl_DStringAppendElement(&dString, containerPtr->parentPtr->pathName); } if (containerPtr->wrapper == None) { Tcl_DStringAppendElement(&dString, ""); } else { if (all) { sprintf(buffer, "0x%x", (int) containerPtr->wrapper); Tcl_DStringAppendElement(&dString, buffer); } else { Tcl_DStringAppendElement(&dString, "XXX"); } } if (containerPtr->embeddedPtr == NULL) { Tcl_DStringAppendElement(&dString, ""); } else { Tcl_DStringAppendElement(&dString, containerPtr->embeddedPtr->pathName); } Tcl_DStringEndSublist(&dString); } Tcl_DStringResult(interp, &dString); return TCL_OK; } /* *---------------------------------------------------------------------- * * EmbedWindowDeleted -- * * This procedure is invoked when a window involved in embedding * (as either the container or the embedded application) is * destroyed. It cleans up the Container structure for the window. * * Results: * None. * * Side effects: * A Container structure may be freed. * *---------------------------------------------------------------------- */ static void EmbedWindowDeleted(winPtr) TkWindow *winPtr; /* Tk's information about window that * was deleted. */ { Container *containerPtr, *prevPtr; /* * Find the Container structure for this window work. Delete the * information about the embedded application and free the container's * record. */ prevPtr = NULL; containerPtr = firstContainerPtr; while (1) { if (containerPtr->embeddedPtr == winPtr) { containerPtr->wrapper = None; containerPtr->embeddedPtr = NULL; break; } if (containerPtr->parentPtr == winPtr) { containerPtr->parentPtr = NULL; break; } prevPtr = containerPtr; containerPtr = containerPtr->nextPtr; } if ((containerPtr->embeddedPtr == NULL) && (containerPtr->parentPtr == NULL)) { if (prevPtr == NULL) { firstContainerPtr = containerPtr->nextPtr; } else { prevPtr->nextPtr = containerPtr->nextPtr; } ckfree((char *) containerPtr); } } /* *---------------------------------------------------------------------- * * TkUnixContainerId -- * * Given an embedded window, this procedure returns the X window * identifier for the associated container window. * * Results: * The return value is the X window identifier for winPtr's * container window. * * Side effects: * None. * *---------------------------------------------------------------------- */ Window TkUnixContainerId(winPtr) TkWindow *winPtr; /* Tk's structure for an embedded window. */ { Container *containerPtr; for (containerPtr = firstContainerPtr; containerPtr != NULL; containerPtr = containerPtr->nextPtr) { if (containerPtr->embeddedPtr == winPtr) { return containerPtr->parent; } } panic("TkUnixContainerId couldn't find window"); return None; }
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