1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/thebes/gfxFontInfoLoader.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,238 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "gfxFontInfoLoader.h"
1.10 +#include "nsCRT.h"
1.11 +#include "nsIObserverService.h"
1.12 +#include "nsThreadUtils.h" // for nsRunnable
1.13 +#include "gfxPlatformFontList.h"
1.14 +
1.15 +using namespace mozilla;
1.16 +using mozilla::services::GetObserverService;
1.17 +
1.18 +void
1.19 +FontInfoData::Load()
1.20 +{
1.21 + TimeStamp start = TimeStamp::Now();
1.22 +
1.23 + uint32_t i, n = mFontFamiliesToLoad.Length();
1.24 + mLoadStats.families = n;
1.25 + for (i = 0; i < n; i++) {
1.26 + LoadFontFamilyData(mFontFamiliesToLoad[i]);
1.27 + }
1.28 +
1.29 + mLoadTime = TimeStamp::Now() - start;
1.30 +}
1.31 +
1.32 +class FontInfoLoadCompleteEvent : public nsRunnable {
1.33 + NS_DECL_THREADSAFE_ISUPPORTS
1.34 +
1.35 + FontInfoLoadCompleteEvent(FontInfoData *aFontInfo) :
1.36 + mFontInfo(aFontInfo)
1.37 + {}
1.38 + virtual ~FontInfoLoadCompleteEvent() {}
1.39 +
1.40 + NS_IMETHOD Run();
1.41 +
1.42 + nsRefPtr<FontInfoData> mFontInfo;
1.43 +};
1.44 +
1.45 +class AsyncFontInfoLoader : public nsRunnable {
1.46 + NS_DECL_THREADSAFE_ISUPPORTS
1.47 +
1.48 + AsyncFontInfoLoader(FontInfoData *aFontInfo) :
1.49 + mFontInfo(aFontInfo)
1.50 + {
1.51 + mCompleteEvent = new FontInfoLoadCompleteEvent(aFontInfo);
1.52 + }
1.53 + virtual ~AsyncFontInfoLoader() {}
1.54 +
1.55 + NS_IMETHOD Run();
1.56 +
1.57 + nsRefPtr<FontInfoData> mFontInfo;
1.58 + nsRefPtr<FontInfoLoadCompleteEvent> mCompleteEvent;
1.59 +};
1.60 +
1.61 +// runs on main thread after async font info loading is done
1.62 +nsresult
1.63 +FontInfoLoadCompleteEvent::Run()
1.64 +{
1.65 + gfxFontInfoLoader *loader =
1.66 + static_cast<gfxFontInfoLoader*>(gfxPlatformFontList::PlatformFontList());
1.67 +
1.68 + loader->FinalizeLoader(mFontInfo);
1.69 +
1.70 + mFontInfo = nullptr;
1.71 + return NS_OK;
1.72 +}
1.73 +
1.74 +NS_IMPL_ISUPPORTS(FontInfoLoadCompleteEvent, nsIRunnable);
1.75 +
1.76 +// runs on separate thread
1.77 +nsresult
1.78 +AsyncFontInfoLoader::Run()
1.79 +{
1.80 + // load platform-specific font info
1.81 + mFontInfo->Load();
1.82 +
1.83 + // post a completion event that transfer the data to the fontlist
1.84 + NS_DispatchToMainThread(mCompleteEvent, NS_DISPATCH_NORMAL);
1.85 + mFontInfo = nullptr;
1.86 +
1.87 + return NS_OK;
1.88 +}
1.89 +
1.90 +NS_IMPL_ISUPPORTS(AsyncFontInfoLoader, nsIRunnable);
1.91 +
1.92 +NS_IMPL_ISUPPORTS(gfxFontInfoLoader::ShutdownObserver, nsIObserver)
1.93 +
1.94 +NS_IMETHODIMP
1.95 +gfxFontInfoLoader::ShutdownObserver::Observe(nsISupports *aSubject,
1.96 + const char *aTopic,
1.97 + const char16_t *someData)
1.98 +{
1.99 + if (!nsCRT::strcmp(aTopic, "quit-application")) {
1.100 + mLoader->CancelLoader();
1.101 + } else {
1.102 + NS_NOTREACHED("unexpected notification topic");
1.103 + }
1.104 + return NS_OK;
1.105 +}
1.106 +
1.107 +void
1.108 +gfxFontInfoLoader::StartLoader(uint32_t aDelay, uint32_t aInterval)
1.109 +{
1.110 + mInterval = aInterval;
1.111 +
1.112 + // sanity check
1.113 + if (mState != stateInitial &&
1.114 + mState != stateTimerOff &&
1.115 + mState != stateTimerOnDelay) {
1.116 + CancelLoader();
1.117 + }
1.118 +
1.119 + // set up timer
1.120 + if (!mTimer) {
1.121 + mTimer = do_CreateInstance("@mozilla.org/timer;1");
1.122 + if (!mTimer) {
1.123 + NS_WARNING("Failure to create font info loader timer");
1.124 + return;
1.125 + }
1.126 + }
1.127 +
1.128 + AddShutdownObserver();
1.129 +
1.130 + // delay? ==> start async thread after a delay
1.131 + if (aDelay) {
1.132 + mState = stateTimerOnDelay;
1.133 + mTimer->InitWithFuncCallback(DelayedStartCallback, this, aDelay,
1.134 + nsITimer::TYPE_ONE_SHOT);
1.135 + return;
1.136 + }
1.137 +
1.138 + mFontInfo = CreateFontInfoData();
1.139 +
1.140 + // initialize
1.141 + InitLoader();
1.142 +
1.143 + // start async load
1.144 + mState = stateAsyncLoad;
1.145 + nsresult rv = NS_NewNamedThread("Font Loader",
1.146 + getter_AddRefs(mFontLoaderThread),
1.147 + nullptr);
1.148 + if (NS_FAILED(rv)) {
1.149 + return;
1.150 + }
1.151 +
1.152 + nsCOMPtr<nsIRunnable> loadEvent = new AsyncFontInfoLoader(mFontInfo);
1.153 +
1.154 + mFontLoaderThread->Dispatch(loadEvent, NS_DISPATCH_NORMAL);
1.155 +}
1.156 +
1.157 +void
1.158 +gfxFontInfoLoader::FinalizeLoader(FontInfoData *aFontInfo)
1.159 +{
1.160 + // avoid loading data if loader has already been canceled
1.161 + if (mState != stateAsyncLoad) {
1.162 + return;
1.163 + }
1.164 +
1.165 + mLoadTime = mFontInfo->mLoadTime;
1.166 +
1.167 + // try to load all font data immediately
1.168 + if (LoadFontInfo()) {
1.169 + CancelLoader();
1.170 + return;
1.171 + }
1.172 +
1.173 + // not all work completed ==> run load on interval
1.174 + mState = stateTimerOnInterval;
1.175 + mTimer->InitWithFuncCallback(LoadFontInfoCallback, this, mInterval,
1.176 + nsITimer::TYPE_REPEATING_SLACK);
1.177 +}
1.178 +
1.179 +void
1.180 +gfxFontInfoLoader::CancelLoader()
1.181 +{
1.182 + if (mState == stateInitial) {
1.183 + return;
1.184 + }
1.185 + mState = stateTimerOff;
1.186 + if (mTimer) {
1.187 + mTimer->Cancel();
1.188 + mTimer = nullptr;
1.189 + }
1.190 + if (mFontLoaderThread) {
1.191 + mFontLoaderThread->Shutdown();
1.192 + mFontLoaderThread = nullptr;
1.193 + }
1.194 + RemoveShutdownObserver();
1.195 + CleanupLoader();
1.196 +}
1.197 +
1.198 +void
1.199 +gfxFontInfoLoader::LoadFontInfoTimerFire()
1.200 +{
1.201 + if (mState == stateTimerOnDelay) {
1.202 + mState = stateTimerOnInterval;
1.203 + mTimer->SetDelay(mInterval);
1.204 + }
1.205 +
1.206 + bool done = LoadFontInfo();
1.207 + if (done) {
1.208 + CancelLoader();
1.209 + }
1.210 +}
1.211 +
1.212 +gfxFontInfoLoader::~gfxFontInfoLoader()
1.213 +{
1.214 + RemoveShutdownObserver();
1.215 +}
1.216 +
1.217 +void
1.218 +gfxFontInfoLoader::AddShutdownObserver()
1.219 +{
1.220 + if (mObserver) {
1.221 + return;
1.222 + }
1.223 +
1.224 + nsCOMPtr<nsIObserverService> obs = GetObserverService();
1.225 + if (obs) {
1.226 + mObserver = new ShutdownObserver(this);
1.227 + obs->AddObserver(mObserver, "quit-application", false);
1.228 + }
1.229 +}
1.230 +
1.231 +void
1.232 +gfxFontInfoLoader::RemoveShutdownObserver()
1.233 +{
1.234 + if (mObserver) {
1.235 + nsCOMPtr<nsIObserverService> obs = GetObserverService();
1.236 + if (obs) {
1.237 + obs->RemoveObserver(mObserver, "quit-application");
1.238 + mObserver = nullptr;
1.239 + }
1.240 + }
1.241 +}
