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8723541a2c
gecko/widget/android/nsAppShell.cpp
Gervase Markham 87620f5676 Bug 716478 - update licence to MPL 2.
2012-05-21 12:12:37 +01:00

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/* -*- Mode: c++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 4; -*- */
/* 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/. */
// Make sure the order of included headers
#include "base/basictypes.h"
#include "nspr/prtypes.h"
#include "mozilla/Hal.h"
#include "nsAppShell.h"
#include "nsWindow.h"
#include "nsThreadUtils.h"
#include "nsICommandLineRunner.h"
#include "nsIObserverService.h"
#include "nsIAppStartup.h"
#include "nsIGeolocationProvider.h"
#include "nsCacheService.h"
#include "nsIDOMEventListener.h"
#include "nsDOMNotifyPaintEvent.h"
#include "nsIDOMClientRectList.h"
#include "nsIDOMClientRect.h"
#include "mozilla/Services.h"
#include "mozilla/unused.h"
#include "mozilla/Preferences.h"
#include "mozilla/Hal.h"
#include "prenv.h"
#include "AndroidBridge.h"
#include <android/log.h>
#include <pthread.h>
#include <wchar.h>
#include "mozilla/dom/ScreenOrientation.h"
#include "sampler.h"
#ifdef MOZ_ANDROID_HISTORY
#include "nsAndroidHistory.h"
#endif
#ifdef MOZ_LOGGING
#define FORCE_PR_LOG
#include "prlog.h"
#endif
#ifdef DEBUG_ANDROID_EVENTS
#define EVLOG(args...) ALOG(args)
#else
#define EVLOG(args...) do { } while (0)
#endif
using namespace mozilla;
#ifdef PR_LOGGING
PRLogModuleInfo *gWidgetLog = nsnull;
#endif
nsIGeolocationUpdate *gLocationCallback = nsnull;
nsAutoPtr<mozilla::AndroidGeckoEvent> gLastSizeChange;
nsAppShell *nsAppShell::gAppShell = nsnull;
NS_IMPL_ISUPPORTS_INHERITED1(nsAppShell, nsBaseAppShell, nsIObserver)
class AfterPaintListener : public nsIDOMEventListener {
public:
NS_DECL_ISUPPORTS
void Register(nsIDOMWindow* window) {
if (mEventTarget)
Unregister();
nsCOMPtr<nsPIDOMWindow> win = do_QueryInterface(window);
if (!win)
return;
mEventTarget = win->GetChromeEventHandler();
if (mEventTarget)
mEventTarget->AddEventListener(NS_LITERAL_STRING("MozAfterPaint"), this, false);
}
void Unregister() {
if (mEventTarget)
mEventTarget->RemoveEventListener(NS_LITERAL_STRING("MozAfterPaint"), this, false);
mEventTarget = nsnull;
}
virtual nsresult HandleEvent(nsIDOMEvent* aEvent) {
nsCOMPtr<nsIDOMNotifyPaintEvent> paintEvent = do_QueryInterface(aEvent);
if (!paintEvent)
return NS_OK;
nsCOMPtr<nsIDOMClientRectList> rects;
paintEvent->GetClientRects(getter_AddRefs(rects));
if (!rects)
return NS_OK;
PRUint32 length;
rects->GetLength(&length);
for (PRUint32 i = 0; i < length; ++i) {
float top, left, bottom, right;
nsCOMPtr<nsIDOMClientRect> rect = rects->GetItemAt(i);
if (!rect)
continue;
rect->GetTop(&top);
rect->GetLeft(&left);
rect->GetRight(&right);
rect->GetBottom(&bottom);
AndroidBridge::NotifyPaintedRect(top, left, bottom, right);
}
return NS_OK;
}
~AfterPaintListener() {
if (mEventTarget)
Unregister();
}
private:
nsCOMPtr<nsIDOMEventTarget> mEventTarget;
};
NS_IMPL_ISUPPORTS1(AfterPaintListener, nsIDOMEventListener)
nsCOMPtr<AfterPaintListener> sAfterPaintListener = nsnull;
nsAppShell::nsAppShell()
: mQueueLock("nsAppShell.mQueueLock"),
mCondLock("nsAppShell.mCondLock"),
mQueueCond(mCondLock, "nsAppShell.mQueueCond"),
mQueuedDrawEvent(nsnull),
mQueuedViewportEvent(nsnull),
mAllowCoalescingNextDraw(false)
{
gAppShell = this;
sAfterPaintListener = new AfterPaintListener();
}
nsAppShell::~nsAppShell()
{
gAppShell = nsnull;
delete sAfterPaintListener;
}
void
nsAppShell::NotifyNativeEvent()
{
MutexAutoLock lock(mCondLock);
mQueueCond.Notify();
}
#define PREFNAME_MATCH_OS "intl.locale.matchOS"
#define PREFNAME_UA_LOCALE "general.useragent.locale"
static const char* kObservedPrefs[] = {
PREFNAME_MATCH_OS,
PREFNAME_UA_LOCALE,
nsnull
};
nsresult
nsAppShell::Init()
{
#ifdef PR_LOGGING
if (!gWidgetLog)
gWidgetLog = PR_NewLogModule("Widget");
#endif
mObserversHash.Init();
nsresult rv = nsBaseAppShell::Init();
AndroidBridge* bridge = AndroidBridge::Bridge();
nsCOMPtr<nsIObserverService> obsServ =
mozilla::services::GetObserverService();
if (obsServ) {
obsServ->AddObserver(this, "xpcom-shutdown", false);
}
if (!bridge)
return rv;
Preferences::AddStrongObservers(this, kObservedPrefs);
bool match;
rv = Preferences::GetBool(PREFNAME_MATCH_OS, &match);
NS_ENSURE_SUCCESS(rv, rv);
if (match) {
bridge->SetSelectedLocale(EmptyString());
return NS_OK;
}
nsAutoString locale;
rv = Preferences::GetLocalizedString(PREFNAME_UA_LOCALE, &locale);
if (NS_FAILED(rv)) {
rv = Preferences::GetString(PREFNAME_UA_LOCALE, &locale);
}
bridge->SetSelectedLocale(locale);
return rv;
}
NS_IMETHODIMP
nsAppShell::Observe(nsISupports* aSubject,
const char* aTopic,
const PRUnichar* aData)
{
if (!strcmp(aTopic, "xpcom-shutdown")) {
// We need to ensure no observers stick around after XPCOM shuts down
// or we'll see crashes, as the app shell outlives XPConnect.
mObserversHash.Clear();
return nsBaseAppShell::Observe(aSubject, aTopic, aData);
} else if (!strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID) && aData && (
nsDependentString(aData).Equals(
NS_LITERAL_STRING(PREFNAME_UA_LOCALE)) ||
nsDependentString(aData).Equals(
NS_LITERAL_STRING(PREFNAME_MATCH_OS)))) {
AndroidBridge* bridge = AndroidBridge::Bridge();
if (!bridge) {
return NS_OK;
}
bool match;
nsresult rv = Preferences::GetBool(PREFNAME_MATCH_OS, &match);
NS_ENSURE_SUCCESS(rv, rv);
if (match) {
bridge->SetSelectedLocale(EmptyString());
return NS_OK;
}
nsAutoString locale;
if (NS_FAILED(Preferences::GetLocalizedString(PREFNAME_UA_LOCALE,
&locale))) {
locale = Preferences::GetString(PREFNAME_UA_LOCALE);
}
bridge->SetSelectedLocale(locale);
return NS_OK;
}
return NS_OK;
}
void
nsAppShell::ScheduleNativeEventCallback()
{
EVLOG("nsAppShell::ScheduleNativeEventCallback pth: %p thread: %p main: %d", (void*) pthread_self(), (void*) NS_GetCurrentThread(), NS_IsMainThread());
// this is valid to be called from any thread, so do so.
PostEvent(new AndroidGeckoEvent(AndroidGeckoEvent::NATIVE_POKE));
}
bool
nsAppShell::ProcessNextNativeEvent(bool mayWait)
{
EVLOG("nsAppShell::ProcessNextNativeEvent %d", mayWait);
SAMPLE_LABEL("nsAppShell", "ProcessNextNativeEvent");
nsAutoPtr<AndroidGeckoEvent> curEvent;
{
MutexAutoLock lock(mCondLock);
curEvent = PopNextEvent();
if (!curEvent && mayWait) {
SAMPLE_LABEL("nsAppShell::ProcessNextNativeEvent", "Wait");
// hmm, should we really hardcode this 10s?
#if defined(DEBUG_ANDROID_EVENTS)
PRTime t0, t1;
EVLOG("nsAppShell: waiting on mQueueCond");
t0 = PR_Now();
mQueueCond.Wait(PR_MillisecondsToInterval(10000));
t1 = PR_Now();
EVLOG("nsAppShell: wait done, waited %d ms", (int)(t1-t0)/1000);
#else
mQueueCond.Wait();
#endif
curEvent = PopNextEvent();
}
}
if (!curEvent)
return false;
EVLOG("nsAppShell: event %p %d", (void*)curEvent.get(), curEvent->Type());
switch (curEvent->Type()) {
case AndroidGeckoEvent::NATIVE_POKE:
NativeEventCallback();
break;
case AndroidGeckoEvent::SENSOR_EVENT:
{
InfallibleTArray<float> values;
mozilla::hal::SensorType type = (mozilla::hal::SensorType) curEvent->Flags();
switch (type) {
case hal::SENSOR_ORIENTATION:
case hal::SENSOR_LINEAR_ACCELERATION:
case hal::SENSOR_ACCELERATION:
case hal::SENSOR_GYROSCOPE:
case hal::SENSOR_PROXIMITY:
values.AppendElement(curEvent->X());
values.AppendElement(curEvent->Y());
values.AppendElement(curEvent->Z());
break;
case hal::SENSOR_LIGHT:
values.AppendElement(curEvent->X());
break;
default:
__android_log_print(ANDROID_LOG_ERROR,
"Gecko", "### SENSOR_EVENT fired, but type wasn't known %d",
type);
}
const hal::SensorAccuracyType &accuracy = (hal::SensorAccuracyType) curEvent->MetaState();
hal::SensorData sdata(type, PR_Now(), values, accuracy);
hal::NotifySensorChange(sdata);
}
break;
case AndroidGeckoEvent::LOCATION_EVENT: {
if (!gLocationCallback)
break;
nsGeoPosition* p = curEvent->GeoPosition();
if (p)
gLocationCallback->Update(curEvent->GeoPosition());
else
NS_WARNING("Received location event without geoposition!");
break;
}
case AndroidGeckoEvent::ACTIVITY_STOPPING: {
if (curEvent->Flags() > 0)
break;
nsCOMPtr<nsIObserverService> obsServ =
mozilla::services::GetObserverService();
NS_NAMED_LITERAL_STRING(minimize, "heap-minimize");
obsServ->NotifyObservers(nsnull, "memory-pressure", minimize.get());
obsServ->NotifyObservers(nsnull, "application-background", nsnull);
break;
}
case AndroidGeckoEvent::ACTIVITY_SHUTDOWN: {
nsCOMPtr<nsIObserverService> obsServ =
mozilla::services::GetObserverService();
NS_NAMED_LITERAL_STRING(context, "shutdown-persist");
obsServ->NotifyObservers(nsnull, "quit-application-granted", nsnull);
obsServ->NotifyObservers(nsnull, "quit-application-forced", nsnull);
obsServ->NotifyObservers(nsnull, "profile-change-net-teardown", context.get());
obsServ->NotifyObservers(nsnull, "profile-change-teardown", context.get());
obsServ->NotifyObservers(nsnull, "profile-before-change", context.get());
nsCOMPtr<nsIAppStartup> appSvc = do_GetService("@mozilla.org/toolkit/app-startup;1");
if (appSvc)
appSvc->Quit(nsIAppStartup::eForceQuit);
break;
}
case AndroidGeckoEvent::ACTIVITY_PAUSING: {
if (curEvent->Flags() == 0) {
// We aren't transferring to one of our own activities, so set
// background status
nsCOMPtr<nsIObserverService> obsServ =
mozilla::services::GetObserverService();
obsServ->NotifyObservers(nsnull, "application-background", nsnull);
// If we are OOM killed with the disk cache enabled, the entire
// cache will be cleared (bug 105843), so shut down the cache here
// and re-init on resume
if (nsCacheService::GlobalInstance())
nsCacheService::GlobalInstance()->Shutdown();
}
// We really want to send a notification like profile-before-change,
// but profile-before-change ends up shutting some things down instead
// of flushing data
nsIPrefService* prefs = Preferences::GetService();
if (prefs) {
// reset the crash loop state
nsCOMPtr<nsIPrefBranch> prefBranch;
prefs->GetBranch("browser.sessionstore.", getter_AddRefs(prefBranch));
if (prefBranch)
prefBranch->SetIntPref("recent_crashes", 0);
prefs->SavePrefFile(nsnull);
}
break;
}
case AndroidGeckoEvent::ACTIVITY_START: {
if (curEvent->Flags() > 0)
break;
nsCOMPtr<nsIObserverService> obsServ =
mozilla::services::GetObserverService();
obsServ->NotifyObservers(nsnull, "application-foreground", nsnull);
break;
}
case AndroidGeckoEvent::PAINT_LISTEN_START_EVENT: {
nsCOMPtr<nsIDOMWindow> domWindow;
nsCOMPtr<nsIBrowserTab> tab;
mBrowserApp->GetBrowserTab(curEvent->MetaState(), getter_AddRefs(tab));
if (!tab)
break;
tab->GetWindow(getter_AddRefs(domWindow));
if (!domWindow)
break;
sAfterPaintListener->Register(domWindow);
break;
}
case AndroidGeckoEvent::SCREENSHOT: {
if (!mBrowserApp)
break;
AndroidBridge* bridge = AndroidBridge::Bridge();
if (!bridge)
break;
PRInt32 token = curEvent->Flags();
nsCOMPtr<nsIDOMWindow> domWindow;
nsCOMPtr<nsIBrowserTab> tab;
mBrowserApp->GetBrowserTab(curEvent->MetaState(), getter_AddRefs(tab));
if (!tab)
break;
tab->GetWindow(getter_AddRefs(domWindow));
if (!domWindow)
break;
float scale = 1.0;
nsTArray<nsIntPoint> points = curEvent->Points();
NS_ASSERTION(points.Length() == 4, "Screenshot event does not have enough coordinates");
bridge->TakeScreenshot(domWindow, points[0].x, points[0].y, points[1].x, points[1].y, points[3].x, points[3].y, curEvent->MetaState(), scale, curEvent->Flags());
break;
}
case AndroidGeckoEvent::VIEWPORT:
case AndroidGeckoEvent::BROADCAST: {
if (curEvent->Characters().Length() == 0)
break;
nsCOMPtr<nsIObserverService> obsServ =
mozilla::services::GetObserverService();
const NS_ConvertUTF16toUTF8 topic(curEvent->Characters());
const nsPromiseFlatString& data = PromiseFlatString(curEvent->CharactersExtra());
obsServ->NotifyObservers(nsnull, topic.get(), data.get());
break;
}
case AndroidGeckoEvent::LOAD_URI: {
nsCOMPtr<nsICommandLineRunner> cmdline
(do_CreateInstance("@mozilla.org/toolkit/command-line;1"));
if (!cmdline)
break;
if (curEvent->Characters().Length() == 0)
break;
char *uri = ToNewUTF8String(curEvent->Characters());
if (!uri)
break;
char *flag = ToNewUTF8String(curEvent->CharactersExtra());
const char *argv[4] = {
"dummyappname",
"-url",
uri,
flag ? flag : ""
};
nsresult rv = cmdline->Init(4, const_cast<char **>(argv), nsnull, nsICommandLine::STATE_REMOTE_AUTO);
if (NS_SUCCEEDED(rv))
cmdline->Run();
nsMemory::Free(uri);
if (flag)
nsMemory::Free(flag);
break;
}
case AndroidGeckoEvent::SIZE_CHANGED: {
// store the last resize event to dispatch it to new windows with a FORCED_RESIZE event
if (curEvent != gLastSizeChange) {
gLastSizeChange = new AndroidGeckoEvent(curEvent);
}
nsWindow::OnGlobalAndroidEvent(curEvent);
break;
}
case AndroidGeckoEvent::VISITED: {
#ifdef MOZ_ANDROID_HISTORY
nsAndroidHistory::NotifyURIVisited(nsString(curEvent->Characters()));
#endif
break;
}
case AndroidGeckoEvent::NETWORK_CHANGED: {
hal::NotifyNetworkChange(hal::NetworkInformation(curEvent->Bandwidth(),
curEvent->CanBeMetered()));
break;
}
case AndroidGeckoEvent::ACTIVITY_RESUMING: {
if (curEvent->Flags() == 0) {
// If we are OOM killed with the disk cache enabled, the entire
// cache will be cleared (bug 105843), so shut down cache on pause
// and re-init here
if (nsCacheService::GlobalInstance())
nsCacheService::GlobalInstance()->Init();
// We didn't return from one of our own activities, so restore
// to foreground status
nsCOMPtr<nsIObserverService> obsServ =
mozilla::services::GetObserverService();
obsServ->NotifyObservers(nsnull, "application-foreground", nsnull);
}
break;
}
case AndroidGeckoEvent::SCREENORIENTATION_CHANGED: {
nsresult rv;
nsCOMPtr<nsIScreenManager> screenMgr =
do_GetService("@mozilla.org/gfx/screenmanager;1", &rv);
if (NS_FAILED(rv)) {
NS_ERROR("Can't find nsIScreenManager!");
break;
}
nsIntRect rect;
PRInt32 colorDepth, pixelDepth;
dom::ScreenOrientation orientation;
nsCOMPtr<nsIScreen> screen;
screenMgr->GetPrimaryScreen(getter_AddRefs(screen));
screen->GetRect(&rect.x, &rect.y, &rect.width, &rect.height);
screen->GetColorDepth(&colorDepth);
screen->GetPixelDepth(&pixelDepth);
orientation =
static_cast<dom::ScreenOrientation>(curEvent->ScreenOrientation());
hal::NotifyScreenConfigurationChange(
hal::ScreenConfiguration(rect, orientation, colorDepth, pixelDepth));
break;
}
default:
nsWindow::OnGlobalAndroidEvent(curEvent);
}
EVLOG("nsAppShell: -- done event %p %d", (void*)curEvent.get(), curEvent->Type());
return true;
}
void
nsAppShell::ResendLastResizeEvent(nsWindow* aDest) {
if (gLastSizeChange) {
nsWindow::OnGlobalAndroidEvent(gLastSizeChange);
}
}
AndroidGeckoEvent*
nsAppShell::PopNextEvent()
{
AndroidGeckoEvent *ae = nsnull;
MutexAutoLock lock(mQueueLock);
if (mEventQueue.Length()) {
ae = mEventQueue[0];
mEventQueue.RemoveElementAt(0);
if (mQueuedDrawEvent == ae) {
mQueuedDrawEvent = nsnull;
} else if (mQueuedViewportEvent == ae) {
mQueuedViewportEvent = nsnull;
}
}
return ae;
}
AndroidGeckoEvent*
nsAppShell::PeekNextEvent()
{
AndroidGeckoEvent *ae = nsnull;
MutexAutoLock lock(mQueueLock);
if (mEventQueue.Length()) {
ae = mEventQueue[0];
}
return ae;
}
void
nsAppShell::PostEvent(AndroidGeckoEvent *ae)
{
{
// set this to true when inserting events that we can coalesce
// viewport events across. this is effectively maintaining a whitelist
// of events that are unaffected by viewport changes.
bool allowCoalescingNextViewport = false;
MutexAutoLock lock(mQueueLock);
EVLOG("nsAppShell::PostEvent %p %d", ae, ae->Type());
switch (ae->Type()) {
case AndroidGeckoEvent::SURFACE_DESTROYED:
// Give priority to this event, and discard any pending
// SURFACE_CREATED events.
mEventQueue.InsertElementAt(0, ae);
AndroidGeckoEvent *event;
for (int i = mEventQueue.Length() - 1; i >= 1; i--) {
event = mEventQueue[i];
if (event->Type() == AndroidGeckoEvent::SURFACE_CREATED) {
EVLOG("nsAppShell: Dropping old SURFACE_CREATED event at %p %d", event, i);
mEventQueue.RemoveElementAt(i);
delete event;
}
}
break;
case AndroidGeckoEvent::COMPOSITOR_PAUSE:
case AndroidGeckoEvent::COMPOSITOR_RESUME:
// Give priority to these events, but maintain their order wrt each other.
{
int i = 0;
while (i < mEventQueue.Length() &&
(mEventQueue[i]->Type() == AndroidGeckoEvent::COMPOSITOR_PAUSE ||
mEventQueue[i]->Type() == AndroidGeckoEvent::COMPOSITOR_RESUME)) {
i++;
}
EVLOG("nsAppShell: Inserting compositor event %d at position %d to maintain priority order", ae->Type(), i);
mEventQueue.InsertElementAt(i, ae);
}
break;
case AndroidGeckoEvent::DRAW:
if (mQueuedDrawEvent) {
// coalesce this new draw event with the one already in the queue
const nsIntRect& oldRect = mQueuedDrawEvent->Rect();
const nsIntRect& newRect = ae->Rect();
int combinedArea = (oldRect.width * oldRect.height) +
(newRect.width * newRect.height);
nsIntRect combinedRect = oldRect.Union(newRect);
// XXX We may want to consider using regions instead of rectangles.
// Print an error if we're upload a lot more than we would
// if we handled this as two separate events.
int boundsArea = combinedRect.width * combinedRect.height;
if (boundsArea > combinedArea * 8)
ALOG("nsAppShell: Area of bounds greatly exceeds combined area: %d > %d",
boundsArea, combinedArea);
// coalesce into the new draw event rather than the queued one because
// it is not always safe to move draws earlier in the queue; there may
// be events between the two draws that affect scroll position or something.
ae->Init(AndroidGeckoEvent::DRAW, combinedRect);
EVLOG("nsAppShell: Coalescing previous DRAW event at %p into new DRAW event %p", mQueuedDrawEvent, ae);
mEventQueue.RemoveElement(mQueuedDrawEvent);
delete mQueuedDrawEvent;
}
if (!mAllowCoalescingNextDraw) {
// if we're not allowing coalescing of this draw event, then
// don't set mQueuedDrawEvent to point to this; that way the
// next draw event that comes in won't kill this one.
mAllowCoalescingNextDraw = true;
mQueuedDrawEvent = nsnull;
} else {
mQueuedDrawEvent = ae;
}
allowCoalescingNextViewport = true;
mEventQueue.AppendElement(ae);
break;
case AndroidGeckoEvent::VIEWPORT:
if (mQueuedViewportEvent) {
// drop the previous viewport event now that we have a new one
EVLOG("nsAppShell: Dropping old viewport event at %p in favour of new VIEWPORT event %p", mQueuedViewportEvent, ae);
mEventQueue.RemoveElement(mQueuedViewportEvent);
delete mQueuedViewportEvent;
}
mQueuedViewportEvent = ae;
// temporarily turn off draw-coalescing, so that we process a draw
// event as soon as possible after a viewport change
mAllowCoalescingNextDraw = false;
allowCoalescingNextViewport = true;
mEventQueue.AppendElement(ae);
break;
case AndroidGeckoEvent::MOTION_EVENT:
if (ae->Action() == AndroidMotionEvent::ACTION_MOVE) {
int len = mEventQueue.Length();
if (len > 0) {
AndroidGeckoEvent* event = mEventQueue[len - 1];
if (event->Type() == AndroidGeckoEvent::MOTION_EVENT && event->Action() == AndroidMotionEvent::ACTION_MOVE) {
// consecutive motion-move events; drop the last one before adding the new one
EVLOG("nsAppShell: Dropping old move event at %p in favour of new move event %p", event, ae);
mEventQueue.RemoveElementAt(len - 1);
delete event;
}
}
}
mEventQueue.AppendElement(ae);
break;
case AndroidGeckoEvent::NATIVE_POKE:
allowCoalescingNextViewport = true;
// fall through
default:
mEventQueue.AppendElement(ae);
break;
}
// if the event wasn't on our whitelist then reset mQueuedViewportEvent
// so that we don't coalesce future viewport events into the last viewport
// event we added
if (!allowCoalescingNextViewport)
mQueuedViewportEvent = nsnull;
}
NotifyNativeEvent();
}
void
nsAppShell::OnResume()
{
}
nsresult
nsAppShell::AddObserver(const nsAString &aObserverKey, nsIObserver *aObserver)
{
NS_ASSERTION(aObserver != nsnull, "nsAppShell::AddObserver: aObserver is null!");
mObserversHash.Put(aObserverKey, aObserver);
return NS_OK;
}
/**
* The XPCOM event that will call the observer on the main thread.
*/
class ObserverCaller : public nsRunnable {
public:
ObserverCaller(nsIObserver *aObserver, const char *aTopic, const PRUnichar *aData) :
mObserver(aObserver), mTopic(aTopic), mData(aData) {
NS_ASSERTION(aObserver != nsnull, "ObserverCaller: aObserver is null!");
}
NS_IMETHOD Run() {
ALOG("ObserverCaller::Run: observer = %p, topic = '%s')",
(nsIObserver*)mObserver, mTopic.get());
mObserver->Observe(nsnull, mTopic.get(), mData.get());
return NS_OK;
}
private:
nsCOMPtr<nsIObserver> mObserver;
nsCString mTopic;
nsString mData;
};
void
nsAppShell::CallObserver(const nsAString &aObserverKey, const nsAString &aTopic, const nsAString &aData)
{
nsCOMPtr<nsIObserver> observer;
mObserversHash.Get(aObserverKey, getter_AddRefs(observer));
if (!observer) {
ALOG("nsAppShell::CallObserver: Observer was not found!");
return;
}
const NS_ConvertUTF16toUTF8 sTopic(aTopic);
const nsPromiseFlatString& sData = PromiseFlatString(aData);
if (NS_IsMainThread()) {
// This branch will unlikely be hit, have it just in case
observer->Observe(nsnull, sTopic.get(), sData.get());
} else {
// Java is not running on main thread, so we have to use NS_DispatchToMainThread
nsCOMPtr<nsIRunnable> observerCaller = new ObserverCaller(observer, sTopic.get(), sData.get());
nsresult rv = NS_DispatchToMainThread(observerCaller);
ALOG("NS_DispatchToMainThread result: %d", rv);
unused << rv;
}
}
void
nsAppShell::RemoveObserver(const nsAString &aObserverKey)
{
mObserversHash.Remove(aObserverKey);
}
// NotifyObservers support. NotifyObservers only works on main thread.
class NotifyObserversCaller : public nsRunnable {
public:
NotifyObserversCaller(nsISupports *aSupports,
const char *aTopic, const PRUnichar *aData) :
mSupports(aSupports), mTopic(aTopic), mData(aData) {
}
NS_IMETHOD Run() {
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os)
os->NotifyObservers(mSupports, mTopic.get(), mData.get());
return NS_OK;
}
private:
nsCOMPtr<nsISupports> mSupports;
nsCString mTopic;
nsString mData;
};
void
nsAppShell::NotifyObservers(nsISupports *aSupports,
const char *aTopic,
const PRUnichar *aData)
{
// This isn't main thread, so post this to main thread
nsCOMPtr<nsIRunnable> caller =
new NotifyObserversCaller(aSupports, aTopic, aData);
NS_DispatchToMainThread(caller);
}
// Used by IPC code
namespace mozilla {
bool ProcessNextEvent()
{
return nsAppShell::gAppShell->ProcessNextNativeEvent(true) ? true : false;
}
void NotifyEvent()
{
nsAppShell::gAppShell->NotifyNativeEvent();
}
}
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