gecko/widget/nsBaseAppShell.h
Mason Chang 45545e98e0 Bug 1085696. Part 1 Move widget/xpwidget to /widget. r=roc
--HG--
rename : widget/xpwidgets/ContentHelper.cpp => widget/ContentHelper.cpp
rename : widget/xpwidgets/ContentHelper.h => widget/ContentHelper.h
rename : widget/xpwidgets/GfxDriverInfo.cpp => widget/GfxDriverInfo.cpp
rename : widget/xpwidgets/GfxDriverInfo.h => widget/GfxDriverInfo.h
rename : widget/xpwidgets/GfxInfoBase.cpp => widget/GfxInfoBase.cpp
rename : widget/xpwidgets/GfxInfoBase.h => widget/GfxInfoBase.h
rename : widget/xpwidgets/GfxInfoCollector.cpp => widget/GfxInfoCollector.cpp
rename : widget/xpwidgets/GfxInfoCollector.h => widget/GfxInfoCollector.h
rename : widget/xpwidgets/GfxInfoWebGL.cpp => widget/GfxInfoWebGL.cpp
rename : widget/xpwidgets/GfxInfoWebGL.h => widget/GfxInfoWebGL.h
rename : widget/xpwidgets/GfxInfoX11.cpp => widget/GfxInfoX11.cpp
rename : widget/xpwidgets/GfxInfoX11.h => widget/GfxInfoX11.h
rename : widget/xpwidgets/InputData.cpp => widget/InputData.cpp
rename : widget/xpwidgets/PuppetWidget.cpp => widget/PuppetWidget.cpp
rename : widget/xpwidgets/PuppetWidget.h => widget/PuppetWidget.h
rename : widget/xpwidgets/ScreenProxy.cpp => widget/ScreenProxy.cpp
rename : widget/xpwidgets/ScreenProxy.h => widget/ScreenProxy.h
rename : widget/shared/SharedWidgetUtils.cpp => widget/SharedWidgetUtils.cpp
rename : widget/xpwidgets/WidgetUtils.cpp => widget/WidgetUtils.cpp
rename : widget/xpwidgets/nsAppShellSingleton.h => widget/nsAppShellSingleton.h
rename : widget/xpwidgets/nsBaseAppShell.cpp => widget/nsBaseAppShell.cpp
rename : widget/xpwidgets/nsBaseAppShell.h => widget/nsBaseAppShell.h
rename : widget/xpwidgets/nsBaseClipboard.cpp => widget/nsBaseClipboard.cpp
rename : widget/xpwidgets/nsBaseClipboard.h => widget/nsBaseClipboard.h
rename : widget/xpwidgets/nsBaseDragService.cpp => widget/nsBaseDragService.cpp
rename : widget/xpwidgets/nsBaseDragService.h => widget/nsBaseDragService.h
rename : widget/xpwidgets/nsBaseFilePicker.cpp => widget/nsBaseFilePicker.cpp
rename : widget/xpwidgets/nsBaseFilePicker.h => widget/nsBaseFilePicker.h
rename : widget/xpwidgets/nsBaseScreen.cpp => widget/nsBaseScreen.cpp
rename : widget/xpwidgets/nsBaseScreen.h => widget/nsBaseScreen.h
rename : widget/xpwidgets/nsBaseWidget.cpp => widget/nsBaseWidget.cpp
rename : widget/xpwidgets/nsBaseWidget.h => widget/nsBaseWidget.h
rename : widget/xpwidgets/nsClipboardHelper.cpp => widget/nsClipboardHelper.cpp
rename : widget/xpwidgets/nsClipboardHelper.h => widget/nsClipboardHelper.h
rename : widget/xpwidgets/nsClipboardProxy.cpp => widget/nsClipboardProxy.cpp
rename : widget/xpwidgets/nsClipboardProxy.h => widget/nsClipboardProxy.h
rename : widget/xpwidgets/nsColorPickerProxy.cpp => widget/nsColorPickerProxy.cpp
rename : widget/xpwidgets/nsColorPickerProxy.h => widget/nsColorPickerProxy.h
rename : widget/xpwidgets/nsContentProcessWidgetFactory.cpp => widget/nsContentProcessWidgetFactory.cpp
rename : widget/xpwidgets/nsFilePickerProxy.cpp => widget/nsFilePickerProxy.cpp
rename : widget/xpwidgets/nsFilePickerProxy.h => widget/nsFilePickerProxy.h
rename : widget/xpwidgets/nsHTMLFormatConverter.cpp => widget/nsHTMLFormatConverter.cpp
rename : widget/xpwidgets/nsHTMLFormatConverter.h => widget/nsHTMLFormatConverter.h
rename : widget/xpwidgets/nsIWidgetListener.cpp => widget/nsIWidgetListener.cpp
rename : widget/xpwidgets/nsIdleService.cpp => widget/nsIdleService.cpp
rename : widget/xpwidgets/nsIdleService.h => widget/nsIdleService.h
rename : widget/xpwidgets/nsNativeTheme.cpp => widget/nsNativeTheme.cpp
rename : widget/xpwidgets/nsNativeTheme.h => widget/nsNativeTheme.h
rename : widget/xpwidgets/nsPrimitiveHelpers.cpp => widget/nsPrimitiveHelpers.cpp
rename : widget/xpwidgets/nsPrimitiveHelpers.h => widget/nsPrimitiveHelpers.h
rename : widget/xpwidgets/nsPrintOptionsImpl.cpp => widget/nsPrintOptionsImpl.cpp
rename : widget/xpwidgets/nsPrintOptionsImpl.h => widget/nsPrintOptionsImpl.h
rename : widget/xpwidgets/nsPrintSession.cpp => widget/nsPrintSession.cpp
rename : widget/xpwidgets/nsPrintSession.h => widget/nsPrintSession.h
rename : widget/xpwidgets/nsPrintSettingsImpl.cpp => widget/nsPrintSettingsImpl.cpp
rename : widget/xpwidgets/nsPrintSettingsImpl.h => widget/nsPrintSettingsImpl.h
rename : widget/xpwidgets/nsScreenManagerProxy.cpp => widget/nsScreenManagerProxy.cpp
rename : widget/xpwidgets/nsScreenManagerProxy.h => widget/nsScreenManagerProxy.h
rename : widget/xpwidgets/nsTransferable.cpp => widget/nsTransferable.cpp
rename : widget/xpwidgets/nsTransferable.h => widget/nsTransferable.h
rename : widget/xpwidgets/nsXPLookAndFeel.cpp => widget/nsXPLookAndFeel.cpp
rename : widget/xpwidgets/nsXPLookAndFeel.h => widget/nsXPLookAndFeel.h
2014-10-23 10:16:45 -07:00

168 lines
5.5 KiB
C++

/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsBaseAppShell_h__
#define nsBaseAppShell_h__
#include "mozilla/Atomics.h"
#include "nsIAppShell.h"
#include "nsIThreadInternal.h"
#include "nsIObserver.h"
#include "nsIRunnable.h"
#include "nsCOMPtr.h"
#include "nsTArray.h"
#include "prinrval.h"
/**
* A singleton that manages the UI thread's event queue. Subclass this class
* to enable platform-specific event queue support.
*/
class nsBaseAppShell : public nsIAppShell, public nsIThreadObserver,
public nsIObserver
{
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIAPPSHELL
NS_DECL_NSITHREADOBSERVER
NS_DECL_NSIOBSERVER
nsBaseAppShell();
protected:
virtual ~nsBaseAppShell();
/**
* This method is called by subclasses when the app shell singleton is
* instantiated.
*/
nsresult Init();
/**
* Called by subclasses from a native event. See ScheduleNativeEventCallback.
*/
void NativeEventCallback();
/**
* Make a decision as to whether or not NativeEventCallback will
* trigger gecko event processing when there are pending gecko
* events.
*/
virtual void DoProcessMoreGeckoEvents();
/**
* Implemented by subclasses. Invoke NativeEventCallback from a native
* event. This method may be called on any thread.
*/
virtual void ScheduleNativeEventCallback() = 0;
/**
* Implemented by subclasses. Process the next native event. Only wait for
* the next native event if mayWait is true. This method is only called on
* the main application thread.
*
* @param mayWait
* If "true", then this method may wait if necessary for the next available
* native event. DispatchNativeEvent may be called to unblock a call to
* ProcessNextNativeEvent that is waiting.
* @return
* This method returns "true" if a native event was processed.
*/
virtual bool ProcessNextNativeEvent(bool mayWait) = 0;
int32_t mSuspendNativeCount;
uint32_t mEventloopNestingLevel;
private:
bool DoProcessNextNativeEvent(bool mayWait, uint32_t recursionDepth);
bool DispatchDummyEvent(nsIThread* target);
void IncrementEventloopNestingLevel();
void DecrementEventloopNestingLevel();
/**
* Runs all synchronous sections which are queued up in mSyncSections.
*/
void RunSyncSectionsInternal(bool stable, uint32_t threadRecursionLevel);
void RunSyncSections(bool stable, uint32_t threadRecursionLevel)
{
if (!mSyncSections.IsEmpty()) {
RunSyncSectionsInternal(stable, threadRecursionLevel);
}
}
void ScheduleSyncSection(nsIRunnable* runnable, bool stable);
struct SyncSection {
SyncSection()
: mStable(false), mEventloopNestingLevel(0), mThreadRecursionLevel(0)
{ }
void Forget(SyncSection* other) {
other->mStable = mStable;
other->mEventloopNestingLevel = mEventloopNestingLevel;
other->mThreadRecursionLevel = mThreadRecursionLevel;
other->mRunnable = mRunnable.forget();
}
bool mStable;
uint32_t mEventloopNestingLevel;
uint32_t mThreadRecursionLevel;
nsCOMPtr<nsIRunnable> mRunnable;
};
nsCOMPtr<nsIRunnable> mDummyEvent;
/**
* mBlockedWait points back to a slot that controls the wait loop in
* an outer OnProcessNextEvent invocation. Nested calls always set
* it to false to unblock an outer loop, since all events may
* have been consumed by the inner event loop(s).
*/
bool *mBlockedWait;
int32_t mFavorPerf;
mozilla::Atomic<bool> mNativeEventPending;
PRIntervalTime mStarvationDelay;
PRIntervalTime mSwitchTime;
PRIntervalTime mLastNativeEventTime;
enum EventloopNestingState {
eEventloopNone, // top level thread execution
eEventloopXPCOM, // innermost native event loop is ProcessNextNativeEvent
eEventloopOther // innermost native event loop is a native library/plugin etc
};
EventloopNestingState mEventloopNestingState;
nsTArray<SyncSection> mSyncSections;
bool mRunning;
bool mExiting;
/**
* mBlockNativeEvent blocks the appshell from processing native events.
* It is set to true while a nested native event loop (eEventloopOther)
* is processing gecko events in NativeEventCallback(), thus queuing up
* native events until we return to that loop (bug 420148).
* We force mBlockNativeEvent to false in case handling one of the gecko
* events spins up a nested XPCOM event loop (eg. modal window) which would
* otherwise lead to a "deadlock" where native events aren't processed at all.
*/
bool mBlockNativeEvent;
/**
* Tracks whether we have processed any gecko events in NativeEventCallback so
* that we can avoid erroneously entering a blocking loop waiting for gecko
* events to show up during OnProcessNextEvent. This is required because on
* OS X ProcessGeckoEvents may be invoked inside the context of
* ProcessNextNativeEvent and may result in NativeEventCallback being invoked
* and in turn invoking NS_ProcessPendingEvents. Because
* ProcessNextNativeEvent may be invoked prior to the NS_HasPendingEvents
* waiting loop, this is the only way to make the loop aware that events may
* have been processed.
*
* This variable is set to false in OnProcessNextEvent prior to the first
* call to DoProcessNextNativeEvent. It is set to true by
* NativeEventCallback after calling NS_ProcessPendingEvents.
*/
bool mProcessedGeckoEvents;
};
#endif // nsBaseAppShell_h__