mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
a47ca866d2
This shows the problems described in bug 710068.
1112 lines
42 KiB
Plaintext
1112 lines
42 KiB
Plaintext
/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is a Cocoa widget run loop and event implementation.
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*
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* The Initial Developer of the Original Code is Google Inc.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Mark Mentovai <mark@moxienet.com> (Original Author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* Runs the main native Cocoa run loop, interrupting it as needed to process
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* Gecko events.
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*/
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#import <Cocoa/Cocoa.h>
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#include <dlfcn.h>
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#include "CustomCocoaEvents.h"
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#include "mozilla/WidgetTraceEvent.h"
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#include "nsAppShell.h"
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#include "nsCOMPtr.h"
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#include "nsIFile.h"
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#include "nsDirectoryServiceDefs.h"
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#include "nsString.h"
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#include "nsIRollupListener.h"
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#include "nsIWidget.h"
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#include "nsThreadUtils.h"
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#include "nsIWindowMediator.h"
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#include "nsServiceManagerUtils.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsIWebBrowserChrome.h"
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#include "nsObjCExceptions.h"
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#include "nsCocoaUtils.h"
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#include "nsChildView.h"
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#include "nsToolkit.h"
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#include "TextInputHandler.h"
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#include "mozilla/HangMonitor.h"
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#include "sampler.h"
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#include "npapi.h"
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using namespace mozilla::widget;
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// defined in nsChildView.mm
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extern nsIRollupListener * gRollupListener;
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extern nsIWidget * gRollupWidget;
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// defined in nsCocoaWindow.mm
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extern PRInt32 gXULModalLevel;
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static bool gAppShellMethodsSwizzled = false;
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// List of current Cocoa app-modal windows (nested if more than one).
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nsCocoaAppModalWindowList *gCocoaAppModalWindowList = NULL;
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// Push a Cocoa app-modal window onto the top of our list.
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nsresult nsCocoaAppModalWindowList::PushCocoa(NSWindow *aWindow, NSModalSession aSession)
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{
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NS_ENSURE_STATE(aWindow && aSession);
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mList.AppendElement(nsCocoaAppModalWindowListItem(aWindow, aSession));
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return NS_OK;
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}
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// Pop the topmost Cocoa app-modal window off our list. aWindow and aSession
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// are just used to check that it's what we expect it to be.
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nsresult nsCocoaAppModalWindowList::PopCocoa(NSWindow *aWindow, NSModalSession aSession)
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{
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NS_ENSURE_STATE(aWindow && aSession);
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for (int i = mList.Length(); i > 0; --i) {
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nsCocoaAppModalWindowListItem &item = mList.ElementAt(i - 1);
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if (item.mSession) {
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NS_ASSERTION((item.mWindow == aWindow) && (item.mSession == aSession),
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"PopCocoa() called without matching call to PushCocoa()!");
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mList.RemoveElementAt(i - 1);
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return NS_OK;
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}
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}
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NS_ERROR("PopCocoa() called without matching call to PushCocoa()!");
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return NS_ERROR_FAILURE;
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}
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// Push a Gecko-modal window onto the top of our list.
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nsresult nsCocoaAppModalWindowList::PushGecko(NSWindow *aWindow, nsCocoaWindow *aWidget)
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{
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NS_ENSURE_STATE(aWindow && aWidget);
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mList.AppendElement(nsCocoaAppModalWindowListItem(aWindow, aWidget));
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return NS_OK;
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}
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// Pop the topmost Gecko-modal window off our list. aWindow and aWidget are
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// just used to check that it's what we expect it to be.
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nsresult nsCocoaAppModalWindowList::PopGecko(NSWindow *aWindow, nsCocoaWindow *aWidget)
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{
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NS_ENSURE_STATE(aWindow && aWidget);
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for (int i = mList.Length(); i > 0; --i) {
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nsCocoaAppModalWindowListItem &item = mList.ElementAt(i - 1);
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if (item.mWidget) {
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NS_ASSERTION((item.mWindow == aWindow) && (item.mWidget == aWidget),
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"PopGecko() called without matching call to PushGecko()!");
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mList.RemoveElementAt(i - 1);
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return NS_OK;
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}
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}
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NS_ERROR("PopGecko() called without matching call to PushGecko()!");
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return NS_ERROR_FAILURE;
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}
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// The "current session" is normally the "session" corresponding to the
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// top-most Cocoa app-modal window (both on the screen and in our list).
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// But because Cocoa app-modal dialog can be "interrupted" by a Gecko-modal
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// dialog, the top-most Cocoa app-modal dialog may already have finished
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// (and no longer be visible). In this case we need to check the list for
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// the "next" visible Cocoa app-modal window (and return its "session"), or
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// (if no Cocoa app-modal window is visible) return nil. This way we ensure
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// (as we need to) that all nested Cocoa app-modal sessions are dealt with
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// before we get to any Gecko-modal session(s). See nsAppShell::
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// ProcessNextNativeEvent() below.
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NSModalSession nsCocoaAppModalWindowList::CurrentSession()
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{
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if (![NSApp _isRunningAppModal])
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return nil;
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NSModalSession currentSession = nil;
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for (int i = mList.Length(); i > 0; --i) {
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nsCocoaAppModalWindowListItem &item = mList.ElementAt(i - 1);
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if (item.mSession && [item.mWindow isVisible]) {
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currentSession = item.mSession;
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break;
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}
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}
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return currentSession;
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}
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// Has a Gecko modal dialog popped up over a Cocoa app-modal dialog?
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bool nsCocoaAppModalWindowList::GeckoModalAboveCocoaModal()
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{
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if (mList.IsEmpty())
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return false;
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nsCocoaAppModalWindowListItem &topItem = mList.ElementAt(mList.Length() - 1);
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return (topItem.mWidget != nsnull);
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}
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// GeckoNSApplication
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//
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// Subclass of NSApplication for filtering out certain events.
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@interface GeckoNSApplication : NSApplication
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{
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}
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@end
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@implementation GeckoNSApplication
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- (void)sendEvent:(NSEvent *)anEvent
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{
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mozilla::HangMonitor::NotifyActivity();
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if ([anEvent type] == NSApplicationDefined &&
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[anEvent subtype] == kEventSubtypeTrace) {
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mozilla::SignalTracerThread();
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return;
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}
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[super sendEvent:anEvent];
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}
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- (NSEvent*)nextEventMatchingMask:(NSUInteger)mask
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untilDate:(NSDate*)expiration
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inMode:(NSString*)mode
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dequeue:(BOOL)flag
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{
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if (expiration) {
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mozilla::HangMonitor::Suspend();
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}
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return [super nextEventMatchingMask:mask
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untilDate:expiration inMode:mode dequeue:flag];
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}
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@end
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// AppShellDelegate
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//
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// Cocoa bridge class. An object of this class is registered to receive
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// notifications.
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//
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@interface AppShellDelegate : NSObject
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{
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@private
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nsAppShell* mAppShell;
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}
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- (id)initWithAppShell:(nsAppShell*)aAppShell;
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- (void)applicationWillTerminate:(NSNotification*)aNotification;
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- (void)beginMenuTracking:(NSNotification*)aNotification;
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@end
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// nsAppShell implementation
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NS_IMETHODIMP
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nsAppShell::ResumeNative(void)
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{
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nsresult retval = nsBaseAppShell::ResumeNative();
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if (NS_SUCCEEDED(retval) && (mSuspendNativeCount == 0) &&
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mSkippedNativeCallback)
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{
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mSkippedNativeCallback = false;
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ScheduleNativeEventCallback();
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}
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return retval;
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}
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nsAppShell::nsAppShell()
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: mAutoreleasePools(nsnull)
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, mDelegate(nsnull)
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, mCFRunLoop(NULL)
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, mCFRunLoopSource(NULL)
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, mRunningEventLoop(false)
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, mStarted(false)
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, mTerminated(false)
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, mSkippedNativeCallback(false)
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, mHadMoreEventsCount(0)
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, mRecursionDepth(0)
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, mNativeEventCallbackDepth(0)
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, mNativeEventScheduledDepth(0)
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{
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// A Cocoa event loop is running here if (and only if) we've been embedded
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// by a Cocoa app (like Camino).
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mRunningCocoaEmbedded = [NSApp isRunning] ? true : false;
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}
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nsAppShell::~nsAppShell()
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{
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NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
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if (mCFRunLoop) {
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if (mCFRunLoopSource) {
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::CFRunLoopRemoveSource(mCFRunLoop, mCFRunLoopSource,
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kCFRunLoopCommonModes);
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::CFRelease(mCFRunLoopSource);
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}
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::CFRelease(mCFRunLoop);
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}
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if (mAutoreleasePools) {
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NS_ASSERTION(::CFArrayGetCount(mAutoreleasePools) == 0,
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"nsAppShell destroyed without popping all autorelease pools");
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::CFRelease(mAutoreleasePools);
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}
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[mDelegate release];
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NS_OBJC_END_TRY_ABORT_BLOCK
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}
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// Init
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//
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// Loads the nib (see bug 316076c21) and sets up the CFRunLoopSource used to
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// interrupt the main native run loop.
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//
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// public
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nsresult
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nsAppShell::Init()
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{
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NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
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// No event loop is running yet (unless Camino is running, or another
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// embedding app that uses NSApplicationMain()).
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NSAutoreleasePool* localPool = [[NSAutoreleasePool alloc] init];
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// mAutoreleasePools is used as a stack of NSAutoreleasePool objects created
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// by |this|. CFArray is used instead of NSArray because NSArray wants to
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// retain each object you add to it, and you can't retain an
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// NSAutoreleasePool.
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mAutoreleasePools = ::CFArrayCreateMutable(nsnull, 0, nsnull);
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NS_ENSURE_STATE(mAutoreleasePools);
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// Get the path of the nib file, which lives in the GRE location
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nsCOMPtr<nsIFile> nibFile;
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nsresult rv = NS_GetSpecialDirectory(NS_GRE_DIR, getter_AddRefs(nibFile));
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NS_ENSURE_SUCCESS(rv, rv);
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nibFile->AppendNative(NS_LITERAL_CSTRING("res"));
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nibFile->AppendNative(NS_LITERAL_CSTRING("MainMenu.nib"));
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nsCAutoString nibPath;
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rv = nibFile->GetNativePath(nibPath);
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NS_ENSURE_SUCCESS(rv, rv);
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// This call initializes NSApplication unless:
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// 1) we're using xre -- NSApp's already been initialized by
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// MacApplicationDelegate.mm's EnsureUseCocoaDockAPI().
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// 2) Camino is running (or another embedding app that uses
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// NSApplicationMain()) -- NSApp's already been initialized and
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// its main run loop is already running.
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[NSBundle loadNibFile:
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[NSString stringWithUTF8String:(const char*)nibPath.get()]
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externalNameTable:
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[NSDictionary dictionaryWithObject:[GeckoNSApplication sharedApplication]
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forKey:@"NSOwner"]
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withZone:NSDefaultMallocZone()];
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mDelegate = [[AppShellDelegate alloc] initWithAppShell:this];
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NS_ENSURE_STATE(mDelegate);
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// Add a CFRunLoopSource to the main native run loop. The source is
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// responsible for interrupting the run loop when Gecko events are ready.
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mCFRunLoop = [[NSRunLoop currentRunLoop] getCFRunLoop];
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NS_ENSURE_STATE(mCFRunLoop);
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::CFRetain(mCFRunLoop);
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CFRunLoopSourceContext context;
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bzero(&context, sizeof(context));
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// context.version = 0;
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context.info = this;
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context.perform = ProcessGeckoEvents;
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mCFRunLoopSource = ::CFRunLoopSourceCreate(kCFAllocatorDefault, 0, &context);
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NS_ENSURE_STATE(mCFRunLoopSource);
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::CFRunLoopAddSource(mCFRunLoop, mCFRunLoopSource, kCFRunLoopCommonModes);
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rv = nsBaseAppShell::Init();
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#ifndef NP_NO_CARBON
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TextInputHandler::InstallPluginKeyEventsHandler();
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#endif
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gCocoaAppModalWindowList = new nsCocoaAppModalWindowList;
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if (!gAppShellMethodsSwizzled) {
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nsToolkit::SwizzleMethods([NSApplication class], @selector(beginModalSessionForWindow:),
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@selector(nsAppShell_NSApplication_beginModalSessionForWindow:));
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nsToolkit::SwizzleMethods([NSApplication class], @selector(endModalSession:),
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@selector(nsAppShell_NSApplication_endModalSession:));
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// We should only replace the original terminate: method if we're not
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// running in a Cocoa embedder (like Camino). See bug 604901.
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if (!mRunningCocoaEmbedded) {
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nsToolkit::SwizzleMethods([NSApplication class], @selector(terminate:),
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@selector(nsAppShell_NSApplication_terminate:));
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}
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if (!nsToolkit::OnSnowLeopardOrLater()) {
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dlopen("/System/Library/Frameworks/Carbon.framework/Frameworks/Print.framework/Versions/Current/Plugins/PrintCocoaUI.bundle/Contents/MacOS/PrintCocoaUI",
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RTLD_LAZY);
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Class PDEPluginCallbackClass = ::NSClassFromString(@"PDEPluginCallback");
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nsresult rv1 = nsToolkit::SwizzleMethods(PDEPluginCallbackClass, @selector(initWithPrintWindowController:),
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@selector(nsAppShell_PDEPluginCallback_initWithPrintWindowController:));
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if (NS_SUCCEEDED(rv1)) {
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nsToolkit::SwizzleMethods(PDEPluginCallbackClass, @selector(dealloc),
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@selector(nsAppShell_PDEPluginCallback_dealloc));
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}
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}
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gAppShellMethodsSwizzled = true;
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}
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[localPool release];
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return rv;
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NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
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}
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// ProcessGeckoEvents
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//
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// The "perform" target of mCFRunLoop, called when mCFRunLoopSource is
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// signalled from ScheduleNativeEventCallback.
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//
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// Arrange for Gecko events to be processed on demand (in response to a call
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// to ScheduleNativeEventCallback(), if processing of Gecko events via "native
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// methods" hasn't been suspended). This happens in NativeEventCallback().
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//
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// protected static
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void
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nsAppShell::ProcessGeckoEvents(void* aInfo)
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{
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NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
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SAMPLE_LABEL("Events", "ProcessGeckoEvents");
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nsAppShell* self = static_cast<nsAppShell*> (aInfo);
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if (self->mRunningEventLoop) {
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self->mRunningEventLoop = false;
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// The run loop may be sleeping -- [NSRunLoop runMode:...]
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// won't return until it's given a reason to wake up. Awaken it by
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// posting a bogus event. There's no need to make the event
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// presentable.
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//
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// But _don't_ set windowNumber to '-1' -- that can lead to nasty
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// wierdness like bmo bug 397039 (a crash in [NSApp sendEvent:] on one of
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// these fake events, because the -1 has gotten changed into the number
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// of an actual NSWindow object, and that NSWindow object has just been
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// destroyed). Setting windowNumber to '0' seems to work fine -- this
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// seems to prevent the OS from ever trying to associate our bogus event
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// with a particular NSWindow object.
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[NSApp postEvent:[NSEvent otherEventWithType:NSApplicationDefined
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location:NSMakePoint(0,0)
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modifierFlags:0
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timestamp:0
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windowNumber:0
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context:NULL
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subtype:kEventSubtypeNone
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data1:0
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data2:0]
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atStart:NO];
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}
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if (self->mSuspendNativeCount <= 0) {
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++self->mNativeEventCallbackDepth;
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self->NativeEventCallback();
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--self->mNativeEventCallbackDepth;
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} else {
|
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self->mSkippedNativeCallback = true;
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}
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|
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// Still needed to fix bug 343033 ("5-10 second delay or hang or crash
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// when quitting Cocoa Firefox").
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[NSApp postEvent:[NSEvent otherEventWithType:NSApplicationDefined
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location:NSMakePoint(0,0)
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modifierFlags:0
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timestamp:0
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windowNumber:0
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context:NULL
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subtype:kEventSubtypeNone
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data1:0
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data2:0]
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atStart:NO];
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// Normally every call to ScheduleNativeEventCallback() results in
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// exactly one call to ProcessGeckoEvents(). So each Release() here
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// normally balances exactly one AddRef() in ScheduleNativeEventCallback().
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// But if Exit() is called just after ScheduleNativeEventCallback(), the
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// corresponding call to ProcessGeckoEvents() will never happen. We check
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// for this possibility in two different places -- here and in Exit()
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// itself. If we find here that Exit() has been called (that mTerminated
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// is true), it's because we've been called recursively, that Exit() was
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// called from self->NativeEventCallback() above, and that we're unwinding
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// the recursion. In this case we'll never be called again, and we balance
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// here any extra calls to ScheduleNativeEventCallback().
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//
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// When ProcessGeckoEvents() is called recursively, it's because of a
|
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// call to ScheduleNativeEventCallback() from NativeEventCallback(). We
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// balance the "extra" AddRefs here (rather than always in Exit()) in order
|
|
// to ensure that 'self' stays alive until the end of this method. We also
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// make sure not to finish the balancing until all the recursion has been
|
|
// unwound.
|
|
if (self->mTerminated) {
|
|
PRInt32 releaseCount = 0;
|
|
if (self->mNativeEventScheduledDepth > self->mNativeEventCallbackDepth) {
|
|
releaseCount = PR_ATOMIC_SET(&self->mNativeEventScheduledDepth,
|
|
self->mNativeEventCallbackDepth);
|
|
}
|
|
while (releaseCount-- > self->mNativeEventCallbackDepth)
|
|
self->Release();
|
|
} else {
|
|
// As best we can tell, every call to ProcessGeckoEvents() is triggered
|
|
// by a call to ScheduleNativeEventCallback(). But we've seen a few
|
|
// (non-reproducible) cases of double-frees that *might* have been caused
|
|
// by spontaneous calls (from the OS) to ProcessGeckoEvents(). So we
|
|
// deal with that possibility here.
|
|
if (PR_ATOMIC_DECREMENT(&self->mNativeEventScheduledDepth) < 0) {
|
|
PR_ATOMIC_SET(&self->mNativeEventScheduledDepth, 0);
|
|
NS_WARNING("Spontaneous call to ProcessGeckoEvents()!");
|
|
} else {
|
|
self->Release();
|
|
}
|
|
}
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK;
|
|
}
|
|
|
|
// WillTerminate
|
|
//
|
|
// Called by the AppShellDelegate when an NSApplicationWillTerminate
|
|
// notification is posted. After this method is called, native events should
|
|
// no longer be processed. The NSApplicationWillTerminate notification is
|
|
// only posted when [NSApp terminate:] is called, which doesn't happen on a
|
|
// "normal" application quit.
|
|
//
|
|
// public
|
|
void
|
|
nsAppShell::WillTerminate()
|
|
{
|
|
if (mTerminated)
|
|
return;
|
|
|
|
// Make sure that the nsAppExitEvent posted by nsAppStartup::Quit() (called
|
|
// from [MacApplicationDelegate applicationShouldTerminate:]) gets run.
|
|
NS_ProcessPendingEvents(NS_GetCurrentThread());
|
|
|
|
mTerminated = true;
|
|
}
|
|
|
|
// ScheduleNativeEventCallback
|
|
//
|
|
// Called (possibly on a non-main thread) when Gecko has an event that
|
|
// needs to be processed. The Gecko event needs to be processed on the
|
|
// main thread, so the native run loop must be interrupted.
|
|
//
|
|
// In nsBaseAppShell.cpp, the mNativeEventPending variable is used to
|
|
// ensure that ScheduleNativeEventCallback() is called no more than once
|
|
// per call to NativeEventCallback(). ProcessGeckoEvents() can skip its
|
|
// call to NativeEventCallback() if processing of Gecko events by native
|
|
// means is suspended (using nsIAppShell::SuspendNative()), which will
|
|
// suspend calls from nsBaseAppShell::OnDispatchedEvent() to
|
|
// ScheduleNativeEventCallback(). But when Gecko event processing by
|
|
// native means is resumed (in ResumeNative()), an extra call is made to
|
|
// ScheduleNativeEventCallback() (from ResumeNative()). This triggers
|
|
// another call to ProcessGeckoEvents(), which calls NativeEventCallback(),
|
|
// and nsBaseAppShell::OnDispatchedEvent() resumes calling
|
|
// ScheduleNativeEventCallback().
|
|
//
|
|
// protected virtual
|
|
void
|
|
nsAppShell::ScheduleNativeEventCallback()
|
|
{
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
|
|
|
|
if (mTerminated)
|
|
return;
|
|
|
|
// Each AddRef() here is normally balanced by exactly one Release() in
|
|
// ProcessGeckoEvents(). But there are exceptions, for which see
|
|
// ProcessGeckoEvents() and Exit().
|
|
NS_ADDREF_THIS();
|
|
PR_ATOMIC_INCREMENT(&mNativeEventScheduledDepth);
|
|
|
|
// This will invoke ProcessGeckoEvents on the main thread.
|
|
::CFRunLoopSourceSignal(mCFRunLoopSource);
|
|
::CFRunLoopWakeUp(mCFRunLoop);
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK;
|
|
}
|
|
|
|
// ProcessNextNativeEvent
|
|
//
|
|
// If aMayWait is false, process a single native event. If it is true, run
|
|
// the native run loop until stopped by ProcessGeckoEvents.
|
|
//
|
|
// Returns true if more events are waiting in the native event queue.
|
|
//
|
|
// But (now that we're using [NSRunLoop runMode:beforeDate:]) it's too
|
|
// expensive to call ProcessNextNativeEvent() many times in a row (in a
|
|
// tight loop), so we never return true more than kHadMoreEventsCountMax
|
|
// times in a row. This doesn't seem to cause native event starvation.
|
|
//
|
|
// protected virtual
|
|
bool
|
|
nsAppShell::ProcessNextNativeEvent(bool aMayWait)
|
|
{
|
|
bool moreEvents = false;
|
|
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
|
|
|
|
bool eventProcessed = false;
|
|
NSString* currentMode = nil;
|
|
|
|
if (mTerminated)
|
|
return false;
|
|
|
|
// We don't want any native events to be processed here (via Gecko) while
|
|
// Cocoa is displaying an app-modal dialog (as opposed to a window-modal
|
|
// "sheet" or a Gecko-modal dialog). Otherwise Cocoa event-processing loops
|
|
// may be interrupted, and inappropriate events may get through to the
|
|
// browser window(s) underneath. This resolves bmo bugs 419668 and 420967.
|
|
//
|
|
// But we need more complex handling (we need to make an exception) if a
|
|
// Gecko modal dialog is running above the Cocoa app-modal dialog -- for
|
|
// which see below.
|
|
if ([NSApp _isRunningAppModal] &&
|
|
(!gCocoaAppModalWindowList || !gCocoaAppModalWindowList->GeckoModalAboveCocoaModal()))
|
|
return false;
|
|
|
|
bool wasRunningEventLoop = mRunningEventLoop;
|
|
mRunningEventLoop = aMayWait;
|
|
NSDate* waitUntil = nil;
|
|
if (aMayWait)
|
|
waitUntil = [NSDate distantFuture];
|
|
|
|
NSRunLoop* currentRunLoop = [NSRunLoop currentRunLoop];
|
|
|
|
do {
|
|
// No autorelease pool is provided here, because OnProcessNextEvent
|
|
// and AfterProcessNextEvent are responsible for maintaining it.
|
|
NS_ASSERTION(mAutoreleasePools && ::CFArrayGetCount(mAutoreleasePools),
|
|
"No autorelease pool for native event");
|
|
|
|
// If an event is waiting to be processed, run the main event loop
|
|
// just long enough to process it. For some reason, using [NSApp
|
|
// nextEventMatchingMask:...] to dequeue the event and [NSApp sendEvent:]
|
|
// to "send" it causes trouble, so we no longer do that. (The trouble
|
|
// was very strange, and only happened while processing Gecko events on
|
|
// demand (via ProcessGeckoEvents()), as opposed to processing Gecko
|
|
// events in a tight loop (via nsBaseAppShell::Run()): Particularly in
|
|
// Camino, mouse-down events sometimes got dropped (or mis-handled), so
|
|
// that (for example) you sometimes needed to click more than once on a
|
|
// button to make it work (the zoom button was particularly susceptible).
|
|
// You also sometimes had to ctrl-click or right-click multiple times to
|
|
// bring up a context menu.)
|
|
|
|
// Now that we're using [NSRunLoop runMode:beforeDate:], it's too
|
|
// expensive to call ProcessNextNativeEvent() many times in a row, so we
|
|
// never return true more than kHadMoreEventsCountMax in a row. I'm not
|
|
// entirely sure why [NSRunLoop runMode:beforeDate:] is too expensive,
|
|
// since it and its cousin [NSRunLoop acceptInputForMode:beforeDate:] are
|
|
// designed to be called in a tight loop. Possibly the problem is due to
|
|
// combining [NSRunLoop runMode:beforeDate] with [NSApp
|
|
// nextEventMatchingMask:...].
|
|
|
|
// We special-case timer events (events of type NSPeriodic) to avoid
|
|
// starving them. Apple's documentation is very scanty, and it's now
|
|
// more scanty than it used to be. But it appears that [NSRunLoop
|
|
// acceptInputForMode:beforeDate:] doesn't process timer events at all,
|
|
// that it is called from [NSRunLoop runMode:beforeDate:], and that
|
|
// [NSRunLoop runMode:beforeDate:], though it does process timer events,
|
|
// doesn't return after doing so. To get around this, when aWait is
|
|
// false we check for timer events and process them using [NSApp
|
|
// sendEvent:]. When aWait is true [NSRunLoop runMode:beforeDate:]
|
|
// will only return on a "real" event. But there's code in
|
|
// ProcessGeckoEvents() that should (when need be) wake us up by sending
|
|
// a "fake" "real" event. (See Apple's current doc on [NSRunLoop
|
|
// runMode:beforeDate:] and a quote from what appears to be an older
|
|
// version of this doc at
|
|
// http://lists.apple.com/archives/cocoa-dev/2001/May/msg00559.html.)
|
|
|
|
// If the current mode is something else than NSDefaultRunLoopMode, look
|
|
// for events in that mode.
|
|
currentMode = [currentRunLoop currentMode];
|
|
if (!currentMode)
|
|
currentMode = NSDefaultRunLoopMode;
|
|
|
|
NSEvent* nextEvent = nil;
|
|
|
|
if (aMayWait) {
|
|
mozilla::HangMonitor::Suspend();
|
|
}
|
|
|
|
// If we're running modal (or not in a Gecko "main" event loop) we still
|
|
// need to use nextEventMatchingMask and sendEvent -- otherwise (in
|
|
// Minefield) the modal window (or non-main event loop) won't receive key
|
|
// events or most mouse events.
|
|
if ([NSApp _isRunningModal] || !InGeckoMainEventLoop()) {
|
|
if ((nextEvent = [NSApp nextEventMatchingMask:NSAnyEventMask
|
|
untilDate:waitUntil
|
|
inMode:currentMode
|
|
dequeue:YES])) {
|
|
// If we're in a Cocoa app-modal session that's been interrupted by a
|
|
// Gecko-modal dialog, send the event to the Cocoa app-modal dialog's
|
|
// session. This ensures that the app-modal session won't be starved
|
|
// of events, and fixes bugs 463473 and 442442. (The case of an
|
|
// ordinary Cocoa app-modal dialog has been dealt with above.)
|
|
//
|
|
// Otherwise (if we're in an ordinary Gecko-modal dialog, or if we're
|
|
// otherwise not in a Gecko main event loop), process the event as
|
|
// expected.
|
|
NSModalSession currentAppModalSession = nil;
|
|
if (gCocoaAppModalWindowList)
|
|
currentAppModalSession = gCocoaAppModalWindowList->CurrentSession();
|
|
|
|
mozilla::HangMonitor::NotifyActivity();
|
|
|
|
if (currentAppModalSession) {
|
|
[NSApp _modalSession:currentAppModalSession sendEvent:nextEvent];
|
|
} else {
|
|
[NSApp sendEvent:nextEvent];
|
|
}
|
|
eventProcessed = true;
|
|
}
|
|
} else {
|
|
if (aMayWait ||
|
|
(nextEvent = [NSApp nextEventMatchingMask:NSAnyEventMask
|
|
untilDate:nil
|
|
inMode:currentMode
|
|
dequeue:NO])) {
|
|
if (nextEvent && ([nextEvent type] == NSPeriodic)) {
|
|
nextEvent = [NSApp nextEventMatchingMask:NSAnyEventMask
|
|
untilDate:waitUntil
|
|
inMode:currentMode
|
|
dequeue:YES];
|
|
[NSApp sendEvent:nextEvent];
|
|
} else {
|
|
[currentRunLoop runMode:currentMode beforeDate:waitUntil];
|
|
}
|
|
eventProcessed = true;
|
|
}
|
|
}
|
|
} while (mRunningEventLoop);
|
|
|
|
if (eventProcessed && (mHadMoreEventsCount < kHadMoreEventsCountMax)) {
|
|
moreEvents = ([NSApp nextEventMatchingMask:NSAnyEventMask
|
|
untilDate:nil
|
|
inMode:currentMode
|
|
dequeue:NO] != nil);
|
|
}
|
|
|
|
if (moreEvents) {
|
|
// Once this reaches kHadMoreEventsCountMax, it will be reset to 0 the
|
|
// next time through (whether or not we process any events then).
|
|
++mHadMoreEventsCount;
|
|
} else {
|
|
mHadMoreEventsCount = 0;
|
|
}
|
|
|
|
mRunningEventLoop = wasRunningEventLoop;
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK;
|
|
|
|
if (!moreEvents) {
|
|
nsChildView::UpdateCurrentInputEventCount();
|
|
}
|
|
|
|
return moreEvents;
|
|
}
|
|
|
|
// Returns true if Gecko events are currently being processed in its "main"
|
|
// event loop (or one of its "main" event loops). Returns false if Gecko
|
|
// events are being processed in a "nested" event loop, or if we're not
|
|
// running in any sort of Gecko event loop. How we process native events in
|
|
// ProcessNextNativeEvent() turns on our decision (and if we make the wrong
|
|
// choice, the result may be a hang).
|
|
//
|
|
// We define the "main" event loop(s) as the place (or places) where Gecko
|
|
// event processing "normally" takes place, and all other Gecko event loops
|
|
// as "nested". The "nested" event loops are normally processed while a call
|
|
// from a "main" event loop is on the stack ... but not always. For example,
|
|
// the Venkman JavaScript debugger runs a "nested" event loop (in jsdService::
|
|
// EnterNestedEventLoop()) whenever it breaks into the current script. But
|
|
// if this happens as the result of the user pressing a key combination, there
|
|
// won't be any other Gecko event-processing call on the stack (e.g.
|
|
// NS_ProcessNextEvent() or NS_ProcessPendingEvents()). (In the current
|
|
// nsAppShell implementation, what counts as the "main" event loop is what
|
|
// nsBaseAppShell::NativeEventCallback() does to process Gecko events. We
|
|
// don't currently use nsBaseAppShell::Run().)
|
|
bool
|
|
nsAppShell::InGeckoMainEventLoop()
|
|
{
|
|
if ((gXULModalLevel > 0) || (mRecursionDepth > 0))
|
|
return false;
|
|
if (mNativeEventCallbackDepth <= 0)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
// Run
|
|
//
|
|
// Overrides the base class's Run() method to call [NSApp run] (which spins
|
|
// the native run loop until the application quits). Since (unlike the base
|
|
// class's Run() method) we don't process any Gecko events here, they need
|
|
// to be processed elsewhere (in NativeEventCallback(), called from
|
|
// ProcessGeckoEvents()).
|
|
//
|
|
// Camino calls [NSApp run] on its own (via NSApplicationMain()), and so
|
|
// doesn't call nsAppShell::Run().
|
|
//
|
|
// public
|
|
NS_IMETHODIMP
|
|
nsAppShell::Run(void)
|
|
{
|
|
NS_ASSERTION(!mStarted, "nsAppShell::Run() called multiple times");
|
|
if (mStarted)
|
|
return NS_OK;
|
|
|
|
mStarted = true;
|
|
NS_OBJC_TRY_ABORT([NSApp run]);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsAppShell::Exit(void)
|
|
{
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
|
|
|
|
// This method is currently called more than once -- from (according to
|
|
// mento) an nsAppExitEvent dispatched by nsAppStartup::Quit() and from an
|
|
// XPCOM shutdown notification that nsBaseAppShell has registered to
|
|
// receive. So we need to ensure that multiple calls won't break anything.
|
|
// But we should also complain about it (since it isn't quite kosher).
|
|
if (mTerminated) {
|
|
NS_WARNING("nsAppShell::Exit() called redundantly");
|
|
return NS_OK;
|
|
}
|
|
|
|
mTerminated = true;
|
|
|
|
delete gCocoaAppModalWindowList;
|
|
gCocoaAppModalWindowList = NULL;
|
|
|
|
#ifndef NP_NO_CARBON
|
|
TextInputHandler::RemovePluginKeyEventsHandler();
|
|
#endif
|
|
|
|
// Quoting from Apple's doc on the [NSApplication stop:] method (from their
|
|
// doc on the NSApplication class): "If this method is invoked during a
|
|
// modal event loop, it will break that loop but not the main event loop."
|
|
// nsAppShell::Exit() shouldn't be called from a modal event loop. So if
|
|
// it is we complain about it (to users of debug builds) and call [NSApp
|
|
// stop:] one extra time. (I'm not sure if modal event loops can be nested
|
|
// -- Apple's docs don't say one way or the other. But the return value
|
|
// of [NSApp _isRunningModal] doesn't change immediately after a call to
|
|
// [NSApp stop:], so we have to assume that one extra call to [NSApp stop:]
|
|
// will do the job.)
|
|
BOOL cocoaModal = [NSApp _isRunningModal];
|
|
NS_ASSERTION(!cocoaModal,
|
|
"Don't call nsAppShell::Exit() from a modal event loop!");
|
|
if (cocoaModal)
|
|
[NSApp stop:nsnull];
|
|
[NSApp stop:nsnull];
|
|
|
|
// A call to Exit() just after a call to ScheduleNativeEventCallback()
|
|
// prevents the (normally) matching call to ProcessGeckoEvents() from
|
|
// happening. If we've been called from ProcessGeckoEvents() (as usually
|
|
// happens), we take care of it there. But if we have an unbalanced call
|
|
// to ScheduleNativeEventCallback() and ProcessGeckoEvents() isn't on the
|
|
// stack, we need to take care of the problem here.
|
|
if (!mNativeEventCallbackDepth && mNativeEventScheduledDepth) {
|
|
PRInt32 releaseCount = PR_ATOMIC_SET(&mNativeEventScheduledDepth, 0);
|
|
while (releaseCount-- > 0)
|
|
NS_RELEASE_THIS();
|
|
}
|
|
|
|
return nsBaseAppShell::Exit();
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
|
|
}
|
|
|
|
// OnProcessNextEvent
|
|
//
|
|
// This nsIThreadObserver method is called prior to processing an event.
|
|
// Set up an autorelease pool that will service any autoreleased Cocoa
|
|
// objects during this event. This includes native events processed by
|
|
// ProcessNextNativeEvent. The autorelease pool will be popped by
|
|
// AfterProcessNextEvent, it is important for these two methods to be
|
|
// tightly coupled.
|
|
//
|
|
// public
|
|
NS_IMETHODIMP
|
|
nsAppShell::OnProcessNextEvent(nsIThreadInternal *aThread, bool aMayWait,
|
|
PRUint32 aRecursionDepth)
|
|
{
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
|
|
|
|
mRecursionDepth = aRecursionDepth;
|
|
|
|
NS_ASSERTION(mAutoreleasePools,
|
|
"No stack on which to store autorelease pool");
|
|
|
|
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
|
|
::CFArrayAppendValue(mAutoreleasePools, pool);
|
|
|
|
return nsBaseAppShell::OnProcessNextEvent(aThread, aMayWait, aRecursionDepth);
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
|
|
}
|
|
|
|
// AfterProcessNextEvent
|
|
//
|
|
// This nsIThreadObserver method is called after event processing is complete.
|
|
// The Cocoa implementation cleans up the autorelease pool create by the
|
|
// previous OnProcessNextEvent call.
|
|
//
|
|
// public
|
|
NS_IMETHODIMP
|
|
nsAppShell::AfterProcessNextEvent(nsIThreadInternal *aThread,
|
|
PRUint32 aRecursionDepth)
|
|
{
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
|
|
|
|
mRecursionDepth = aRecursionDepth;
|
|
|
|
CFIndex count = ::CFArrayGetCount(mAutoreleasePools);
|
|
|
|
NS_ASSERTION(mAutoreleasePools && count,
|
|
"Processed an event, but there's no autorelease pool?");
|
|
|
|
const NSAutoreleasePool* pool = static_cast<const NSAutoreleasePool*>
|
|
(::CFArrayGetValueAtIndex(mAutoreleasePools, count - 1));
|
|
::CFArrayRemoveValueAtIndex(mAutoreleasePools, count - 1);
|
|
[pool release];
|
|
|
|
return nsBaseAppShell::AfterProcessNextEvent(aThread, aRecursionDepth);
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
|
|
}
|
|
|
|
|
|
// AppShellDelegate implementation
|
|
|
|
|
|
@implementation AppShellDelegate
|
|
// initWithAppShell:
|
|
//
|
|
// Constructs the AppShellDelegate object
|
|
- (id)initWithAppShell:(nsAppShell*)aAppShell
|
|
{
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
|
|
|
|
if ((self = [self init])) {
|
|
mAppShell = aAppShell;
|
|
|
|
[[NSNotificationCenter defaultCenter] addObserver:self
|
|
selector:@selector(applicationWillTerminate:)
|
|
name:NSApplicationWillTerminateNotification
|
|
object:NSApp];
|
|
[[NSNotificationCenter defaultCenter] addObserver:self
|
|
selector:@selector(applicationDidBecomeActive:)
|
|
name:NSApplicationDidBecomeActiveNotification
|
|
object:NSApp];
|
|
[[NSDistributedNotificationCenter defaultCenter] addObserver:self
|
|
selector:@selector(beginMenuTracking:)
|
|
name:@"com.apple.HIToolbox.beginMenuTrackingNotification"
|
|
object:nil];
|
|
}
|
|
|
|
return self;
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
|
|
}
|
|
|
|
- (void)dealloc
|
|
{
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
|
|
|
|
[[NSNotificationCenter defaultCenter] removeObserver:self];
|
|
[[NSDistributedNotificationCenter defaultCenter] removeObserver:self];
|
|
[super dealloc];
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK;
|
|
}
|
|
|
|
// applicationWillTerminate:
|
|
//
|
|
// Notify the nsAppShell that native event processing should be discontinued.
|
|
- (void)applicationWillTerminate:(NSNotification*)aNotification
|
|
{
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
|
|
|
|
mAppShell->WillTerminate();
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK;
|
|
}
|
|
|
|
// applicationDidBecomeActive
|
|
//
|
|
// Make sure TextInputHandler::sLastModifierState is updated when we become
|
|
// active (since we won't have received [ChildView flagsChanged:] messages
|
|
// while inactive).
|
|
- (void)applicationDidBecomeActive:(NSNotification*)aNotification
|
|
{
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
|
|
|
|
// [NSEvent modifierFlags] is valid on every kind of event, so we don't need
|
|
// to worry about getting an NSInternalInconsistencyException here.
|
|
NSEvent* currentEvent = [NSApp currentEvent];
|
|
if (currentEvent) {
|
|
TextInputHandler::sLastModifierState =
|
|
[currentEvent modifierFlags] & NSDeviceIndependentModifierFlagsMask;
|
|
}
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK;
|
|
}
|
|
|
|
// beginMenuTracking
|
|
//
|
|
// Roll up our context menu (if any) when some other app (or the OS) opens
|
|
// any sort of menu. But make sure we don't do this for notifications we
|
|
// send ourselves (whose 'sender' will be @"org.mozilla.gecko.PopupWindow").
|
|
- (void)beginMenuTracking:(NSNotification*)aNotification
|
|
{
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
|
|
|
|
NSString *sender = [aNotification object];
|
|
if (!sender || ![sender isEqualToString:@"org.mozilla.gecko.PopupWindow"]) {
|
|
if (gRollupListener && gRollupWidget)
|
|
gRollupListener->Rollup(0);
|
|
}
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK;
|
|
}
|
|
|
|
@end
|
|
|
|
// We hook beginModalSessionForWindow: and endModalSession: in order to
|
|
// maintain a list of Cocoa app-modal windows (and the "sessions" to which
|
|
// they correspond). We need this in order to deal with the consequences
|
|
// of a Cocoa app-modal dialog being "interrupted" by a Gecko-modal dialog.
|
|
// See nsCocoaAppModalWindowList::CurrentSession() and
|
|
// nsAppShell::ProcessNextNativeEvent() above.
|
|
//
|
|
// We hook terminate: in order to make OS-initiated termination work nicely
|
|
// with Gecko's shutdown sequence. (Two ways to trigger OS-initiated
|
|
// termination: 1) Quit from the Dock menu; 2) Log out from (or shut down)
|
|
// your computer while the browser is active.)
|
|
@interface NSApplication (MethodSwizzling)
|
|
- (NSModalSession)nsAppShell_NSApplication_beginModalSessionForWindow:(NSWindow *)aWindow;
|
|
- (void)nsAppShell_NSApplication_endModalSession:(NSModalSession)aSession;
|
|
- (void)nsAppShell_NSApplication_terminate:(id)sender;
|
|
@end
|
|
|
|
@implementation NSApplication (MethodSwizzling)
|
|
|
|
// Called if and only if a Cocoa app-modal session is beginning. Always call
|
|
// gCocoaAppModalWindowList->PushCocoa() here (if gCocoaAppModalWindowList is
|
|
// non-nil).
|
|
- (NSModalSession)nsAppShell_NSApplication_beginModalSessionForWindow:(NSWindow *)aWindow
|
|
{
|
|
NSModalSession session =
|
|
[self nsAppShell_NSApplication_beginModalSessionForWindow:aWindow];
|
|
if (gCocoaAppModalWindowList)
|
|
gCocoaAppModalWindowList->PushCocoa(aWindow, session);
|
|
return session;
|
|
}
|
|
|
|
// Called to end any Cocoa modal session (app-modal or otherwise). Only call
|
|
// gCocoaAppModalWindowList->PopCocoa() when an app-modal session is ending
|
|
// (and when gCocoaAppModalWindowList is non-nil).
|
|
- (void)nsAppShell_NSApplication_endModalSession:(NSModalSession)aSession
|
|
{
|
|
BOOL wasRunningAppModal = [NSApp _isRunningAppModal];
|
|
NSWindow *prevAppModalWindow = [NSApp modalWindow];
|
|
[self nsAppShell_NSApplication_endModalSession:aSession];
|
|
if (gCocoaAppModalWindowList &&
|
|
wasRunningAppModal && (prevAppModalWindow != [NSApp modalWindow]))
|
|
gCocoaAppModalWindowList->PopCocoa(prevAppModalWindow, aSession);
|
|
}
|
|
|
|
// Called by the OS after [MacApplicationDelegate applicationShouldTerminate:]
|
|
// has returned NSTerminateNow. This method "subclasses" and replaces the
|
|
// OS's original implementation. The only thing the orginal method does which
|
|
// we need is that it posts NSApplicationWillTerminateNotification. Everything
|
|
// else is unneeded (because it's handled elsewhere), or actively interferes
|
|
// with Gecko's shutdown sequence. For example the original terminate: method
|
|
// causes the app to exit() inside [NSApp run] (called from nsAppShell::Run()
|
|
// above), which means that nothing runs after the call to nsAppStartup::Run()
|
|
// in XRE_Main(), which in particular means that ScopedXPCOMStartup's destructor
|
|
// and NS_ShutdownXPCOM() never get called.
|
|
- (void)nsAppShell_NSApplication_terminate:(id)sender
|
|
{
|
|
[[NSNotificationCenter defaultCenter] postNotificationName:NSApplicationWillTerminateNotification
|
|
object:NSApp];
|
|
}
|
|
|
|
@end
|
|
|
|
@interface NSObject (PDEPluginCallbackMethodSwizzling)
|
|
- (id)nsAppShell_PDEPluginCallback_initWithPrintWindowController:(id)controller;
|
|
- (void)nsAppShell_PDEPluginCallback_dealloc;
|
|
@end
|
|
|
|
@implementation NSObject (PDEPluginCallbackMethodSwizzling)
|
|
|
|
// On Leopard, the PDEPluginCallback class in Apple's PrintCocoaUI module
|
|
// fails to retain and release its PMPrintWindowController object. This
|
|
// causes the PMPrintWindowController to sometimes be deleted prematurely,
|
|
// leading to crashes on attempts to access it. One example is bug 396680,
|
|
// caused by attempting to call a deleted PMPrintWindowController object's
|
|
// printSettings method. We work around the problem by hooking the
|
|
// appropriate methods and retaining and releasing the object ourselves.
|
|
// PrintCocoaUI.bundle is a "plugin" of the Carbon framework's Print
|
|
// framework.
|
|
|
|
- (id)nsAppShell_PDEPluginCallback_initWithPrintWindowController:(id)controller
|
|
{
|
|
return [self nsAppShell_PDEPluginCallback_initWithPrintWindowController:[controller retain]];
|
|
}
|
|
|
|
- (void)nsAppShell_PDEPluginCallback_dealloc
|
|
{
|
|
// Since the PDEPluginCallback class is undocumented (and the OS header
|
|
// files have no definition for it), we need to use low-level methods to
|
|
// access its _printWindowController variable. (object_getInstanceVariable()
|
|
// is also available in Objective-C 2.0, so this code is 64-bit safe.)
|
|
id _printWindowController = nil;
|
|
object_getInstanceVariable(self, "_printWindowController",
|
|
(void **) &_printWindowController);
|
|
[_printWindowController release];
|
|
[self nsAppShell_PDEPluginCallback_dealloc];
|
|
}
|
|
|
|
@end
|