components/html_viewer/html_document.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/html_viewer/html_document.h"
   6
   7 #include "base/bind.h"
   8 #include "base/location.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/message_loop/message_loop_proxy.h"
  11 #include "base/single_thread_task_runner.h"
  12 #include "base/stl_util.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/thread_task_runner_handle.h"
  15 #include "components/html_viewer/blink_input_events_type_converters.h"
  16 #include "components/html_viewer/blink_url_request_type_converters.h"
  17 #include "components/html_viewer/setup.h"
  18 #include "components/html_viewer/web_layer_tree_view_impl.h"
  19 #include "components/html_viewer/web_media_player_factory.h"
  20 #include "components/html_viewer/web_storage_namespace_impl.h"
  21 #include "components/html_viewer/web_url_loader_impl.h"
  22 #include "components/surfaces/public/interfaces/surfaces.mojom.h"
  23 #include "components/view_manager/public/cpp/view.h"
  24 #include "media/blink/webencryptedmediaclient_impl.h"
  25 #include "media/cdm/default_cdm_factory.h"
  26 #include "media/filters/default_media_permission.h"
  27 #include "mojo/application/public/cpp/application_impl.h"
  28 #include "mojo/application/public/cpp/connect.h"
  29 #include "mojo/application/public/interfaces/shell.mojom.h"
  30 #include "skia/ext/refptr.h"
  31 #include "third_party/WebKit/public/platform/Platform.h"
  32 #include "third_party/WebKit/public/platform/WebHTTPHeaderVisitor.h"
  33 #include "third_party/WebKit/public/platform/WebSize.h"
  34 #include "third_party/WebKit/public/web/WebConsoleMessage.h"
  35 #include "third_party/WebKit/public/web/WebDocument.h"
  36 #include "third_party/WebKit/public/web/WebElement.h"
  37 #include "third_party/WebKit/public/web/WebInputEvent.h"
  38 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  39 #include "third_party/WebKit/public/web/WebScriptSource.h"
  40 #include "third_party/WebKit/public/web/WebSettings.h"
  41 #include "third_party/WebKit/public/web/WebView.h"
  42 #include "third_party/mojo/src/mojo/public/cpp/system/data_pipe.h"
  43 #include "third_party/skia/include/core/SkCanvas.h"
  44 #include "third_party/skia/include/core/SkColor.h"
  45 #include "third_party/skia/include/core/SkDevice.h"
  46 #include "ui/gfx/geometry/dip_util.h"
  47 #include "ui/gfx/geometry/size.h"
  48
  49 using mojo::AxProvider;
  50 using mojo::Rect;
  51 using mojo::ServiceProviderPtr;
  52 using mojo::URLResponsePtr;
  53 using mojo::View;
  54 using mojo::ViewManager;
  55 using mojo::WeakBindToRequest;
  56
  57 namespace html_viewer {
  58 namespace {
  59
  60 void ConfigureSettings(blink::WebSettings* settings) {
  61   settings->setCookieEnabled(true);
  62   settings->setDefaultFixedFontSize(13);
  63   settings->setDefaultFontSize(16);
  64   settings->setLoadsImagesAutomatically(true);
  65   settings->setJavaScriptEnabled(true);
  66 }
  67
  68 mojo::Target WebNavigationPolicyToNavigationTarget(
  69     blink::WebNavigationPolicy policy) {
  70   switch (policy) {
  71     case blink::WebNavigationPolicyCurrentTab:
  72       return mojo::TARGET_SOURCE_NODE;
  73     case blink::WebNavigationPolicyNewBackgroundTab:
  74     case blink::WebNavigationPolicyNewForegroundTab:
  75     case blink::WebNavigationPolicyNewWindow:
  76     case blink::WebNavigationPolicyNewPopup:
  77       return mojo::TARGET_NEW_NODE;
  78     default:
  79       return mojo::TARGET_DEFAULT;
  80   }
  81 }
  82
  83 bool CanNavigateLocally(blink::WebFrame* frame,
  84                         const blink::WebURLRequest& request) {
  85   // For now, we just load child frames locally.
  86   // TODO(aa): In the future, this should use embedding to connect to a
  87   // different instance of Blink if the frame is cross-origin.
  88   if (frame->parent())
  89     return true;
  90
  91   // If we have extraData() it means we already have the url response
  92   // (presumably because we are being called via Navigate()). In that case we
  93   // can go ahead and navigate locally.
  94   if (request.extraData())
  95     return true;
  96
  97   // mojo::NavigatorHost doesn't accept POSTs, so for now reuse this instance.
  98   // TODO(jam): improve this (and copy logic from RenderFrameImpl's version)
  99   // when we have multi-process.
 100   if (EqualsASCII(request.httpMethod(), "POST"))
 101     return true;
 102
 103   // Logging into Gmail fails when the referrer isn't sent with a request.
 104   // TODO(jam): pass referrer and other HTTP data to NavigatorHost so we can
 105   // use a new process in this case.
 106   if (!request.httpHeaderField(blink::WebString::fromUTF8("Referer")).isEmpty())
 107     return true;
 108
 109   // Otherwise we don't know if we're the right app to handle this request. Ask
 110   // host to do the navigation for us.
 111   return false;
 112 }
 113
 114 bool AreSecureCodecsSupported() {
 115   // Hardware-secure codecs are not currently supported by HTML Viewer on any
 116   // platform.
 117   return false;
 118 }
 119
 120 }  // namespace
 121
 122 HTMLDocument::HTMLDocument(
 123     mojo::InterfaceRequest<mojo::ServiceProvider> services,
 124     URLResponsePtr response,
 125     mojo::Shell* shell,
 126     Setup* setup)
 127     : response_(response.Pass()),
 128       shell_(shell),
 129       web_view_(nullptr),
 130       root_(nullptr),
 131       view_manager_client_factory_(shell_, this),
 132       setup_(setup) {
 133   exported_services_.AddService(this);
 134   exported_services_.AddService(&view_manager_client_factory_);
 135   exported_services_.Bind(services.Pass());
 136   if (setup_->did_init())
 137     Load(response_.Pass());
 138 }
 139
 140 HTMLDocument::~HTMLDocument() {
 141   STLDeleteElements(&ax_providers_);
 142   STLDeleteElements(&ax_provider_requests_);
 143
 144   if (web_view_)
 145     web_view_->close();
 146   if (root_)
 147     root_->RemoveObserver(this);
 148 }
 149
 150 void HTMLDocument::OnEmbed(
 151     View* root,
 152     mojo::InterfaceRequest<mojo::ServiceProvider> services,
 153     mojo::ServiceProviderPtr exposed_services) {
 154   DCHECK(!setup_->is_headless());
 155   root_ = root;
 156   root_->AddObserver(this);
 157   embedder_service_provider_ = exposed_services.Pass();
 158   navigator_host_.set_service_provider(embedder_service_provider_.get());
 159
 160   InitSetupAndLoadIfNecessary();
 161 }
 162
 163 void HTMLDocument::OnViewManagerDisconnected(ViewManager* view_manager) {
 164   // TODO(aa): Need to figure out how shutdown works.
 165 }
 166
 167 void HTMLDocument::Create(mojo::ApplicationConnection* connection,
 168                           mojo::InterfaceRequest<AxProvider> request) {
 169   if (!did_finish_load_) {
 170     // Cache AxProvider interface requests until the document finishes loading.
 171     auto cached_request = new mojo::InterfaceRequest<AxProvider>();
 172     *cached_request = request.Pass();
 173     ax_provider_requests_.insert(cached_request);
 174   } else {
 175     ax_providers_.insert(
 176         WeakBindToRequest(new AxProviderImpl(web_view_), &request));
 177   }
 178 }
 179
 180 void HTMLDocument::Load(URLResponsePtr response) {
 181   DCHECK(!web_view_);
 182   web_view_ = blink::WebView::create(this);
 183   touch_handler_.reset(new TouchHandler(web_view_));
 184   web_layer_tree_view_impl_->set_widget(web_view_);
 185   ConfigureSettings(web_view_->settings());
 186   web_view_->setMainFrame(blink::WebLocalFrame::create(this));
 187
 188   GURL url(response->url);
 189
 190   WebURLRequestExtraData* extra_data = new WebURLRequestExtraData;
 191   extra_data->synthetic_response = response.Pass();
 192
 193   blink::WebURLRequest web_request;
 194   web_request.initialize();
 195   web_request.setURL(url);
 196   web_request.setExtraData(extra_data);
 197
 198   web_view_->mainFrame()->loadRequest(web_request);
 199 }
 200
 201 void HTMLDocument::UpdateWebviewSizeFromViewSize() {
 202   web_view_->setDeviceScaleFactor(setup_->device_pixel_ratio());
 203   const gfx::Size size_in_pixels(root_->bounds().width, root_->bounds().height);
 204   const gfx::Size size_in_dips = gfx::ConvertSizeToDIP(
 205       root_->viewport_metrics().device_pixel_ratio, size_in_pixels);
 206   web_view_->resize(
 207       blink::WebSize(size_in_dips.width(), size_in_dips.height()));
 208   web_layer_tree_view_impl_->setViewportSize(size_in_pixels);
 209 }
 210
 211 void HTMLDocument::InitSetupAndLoadIfNecessary() {
 212   DCHECK(root_);
 213   if (web_view_ || root_->viewport_metrics().device_pixel_ratio == 0.f)
 214     return;
 215
 216   setup_->InitIfNecessary(gfx::Size(root_->viewport_metrics().size->width,
 217                                     root_->viewport_metrics().size->height),
 218                           root_->viewport_metrics().device_pixel_ratio);
 219   Load(response_.Pass());
 220
 221   UpdateWebviewSizeFromViewSize();
 222   web_layer_tree_view_impl_->set_view(root_);
 223 }
 224
 225 blink::WebStorageNamespace* HTMLDocument::createSessionStorageNamespace() {
 226   return new WebStorageNamespaceImpl();
 227 }
 228
 229 void HTMLDocument::initializeLayerTreeView() {
 230   if (setup_->is_headless()) {
 231     web_layer_tree_view_impl_.reset(new WebLayerTreeViewImpl(
 232         setup_->compositor_thread(), nullptr, nullptr));
 233     return;
 234   }
 235
 236   ServiceProviderPtr surfaces_service_provider;
 237   shell_->ConnectToApplication("mojo:surfaces_service",
 238                                GetProxy(&surfaces_service_provider), nullptr);
 239   mojo::SurfacePtr surface;
 240   ConnectToService(surfaces_service_provider.get(), &surface);
 241
 242   ServiceProviderPtr gpu_service_provider;
 243   // TODO(jamesr): Should be mojo:gpu_service
 244   shell_->ConnectToApplication("mojo:native_viewport_service",
 245                                GetProxy(&gpu_service_provider), nullptr);
 246   mojo::GpuPtr gpu_service;
 247   ConnectToService(gpu_service_provider.get(), &gpu_service);
 248   web_layer_tree_view_impl_.reset(new WebLayerTreeViewImpl(
 249       setup_->compositor_thread(), surface.Pass(), gpu_service.Pass()));
 250 }
 251
 252 blink::WebLayerTreeView* HTMLDocument::layerTreeView() {
 253   return web_layer_tree_view_impl_.get();
 254 }
 255
 256 blink::WebMediaPlayer* HTMLDocument::createMediaPlayer(
 257     blink::WebLocalFrame* frame,
 258     const blink::WebURL& url,
 259     blink::WebMediaPlayerClient* client) {
 260   return createMediaPlayer(frame, url, client, nullptr);
 261 }
 262
 263 blink::WebMediaPlayer* HTMLDocument::createMediaPlayer(
 264     blink::WebLocalFrame* frame,
 265     const blink::WebURL& url,
 266     blink::WebMediaPlayerClient* client,
 267     blink::WebContentDecryptionModule* initial_cdm) {
 268   blink::WebMediaPlayer* player =
 269       setup_->web_media_player_factory()
 270           ? setup_->web_media_player_factory()->CreateMediaPlayer(
 271                 frame, url, client, GetMediaPermission(), GetCdmFactory(),
 272                 initial_cdm, shell_)
 273           : nullptr;
 274   return player;
 275 }
 276
 277 blink::WebFrame* HTMLDocument::createChildFrame(
 278     blink::WebLocalFrame* parent,
 279     const blink::WebString& frameName,
 280     blink::WebSandboxFlags sandboxFlags) {
 281   blink::WebLocalFrame* web_frame = blink::WebLocalFrame::create(this);
 282   parent->appendChild(web_frame);
 283   return web_frame;
 284 }
 285
 286 void HTMLDocument::frameDetached(blink::WebFrame* frame) {
 287   if (frame->parent())
 288     frame->parent()->removeChild(frame);
 289
 290   // |frame| is invalid after here.
 291   frame->close();
 292 }
 293
 294 blink::WebCookieJar* HTMLDocument::cookieJar(blink::WebLocalFrame* frame) {
 295   // TODO(darin): Blink does not fallback to the Platform provided WebCookieJar.
 296   // Either it should, as it once did, or we should find another solution here.
 297   return blink::Platform::current()->cookieJar();
 298 }
 299
 300 blink::WebNavigationPolicy HTMLDocument::decidePolicyForNavigation(
 301     blink::WebLocalFrame* frame,
 302     blink::WebDataSource::ExtraData* data,
 303     const blink::WebURLRequest& request,
 304     blink::WebNavigationType nav_type,
 305     blink::WebNavigationPolicy default_policy,
 306     bool is_redirect) {
 307   if (CanNavigateLocally(frame, request))
 308     return default_policy;
 309
 310   if (navigator_host_.get()) {
 311     navigator_host_->RequestNavigate(
 312         WebNavigationPolicyToNavigationTarget(default_policy),
 313         mojo::URLRequest::From(request).Pass());
 314   }
 315
 316   return blink::WebNavigationPolicyIgnore;
 317 }
 318
 319 void HTMLDocument::didAddMessageToConsole(
 320     const blink::WebConsoleMessage& message,
 321     const blink::WebString& source_name,
 322     unsigned source_line,
 323     const blink::WebString& stack_trace) {
 324   VLOG(1) << "[" << source_name.utf8() << "(" << source_line << ")] "
 325           << message.text.utf8();
 326 }
 327
 328 void HTMLDocument::didFinishLoad(blink::WebLocalFrame* frame) {
 329   // TODO(msw): Notify AxProvider clients of updates on child frame loads.
 330   did_finish_load_ = true;
 331   // Bind any pending AxProviderImpl interface requests.
 332   for (auto it : ax_provider_requests_)
 333     ax_providers_.insert(WeakBindToRequest(new AxProviderImpl(web_view_), it));
 334   STLDeleteElements(&ax_provider_requests_);
 335 }
 336
 337 void HTMLDocument::didNavigateWithinPage(
 338     blink::WebLocalFrame* frame,
 339     const blink::WebHistoryItem& history_item,
 340     blink::WebHistoryCommitType commit_type) {
 341   if (navigator_host_.get())
 342     navigator_host_->DidNavigateLocally(history_item.urlString().utf8());
 343 }
 344
 345 blink::WebEncryptedMediaClient* HTMLDocument::encryptedMediaClient() {
 346   if (!web_encrypted_media_client_) {
 347     web_encrypted_media_client_.reset(new media::WebEncryptedMediaClientImpl(
 348         base::Bind(&AreSecureCodecsSupported), GetCdmFactory(),
 349         GetMediaPermission()));
 350   }
 351   return web_encrypted_media_client_.get();
 352 }
 353
 354 void HTMLDocument::OnViewBoundsChanged(View* view,
 355                                        const Rect& old_bounds,
 356                                        const Rect& new_bounds) {
 357   DCHECK_EQ(view, root_);
 358   UpdateWebviewSizeFromViewSize();
 359 }
 360
 361 void HTMLDocument::OnViewViewportMetricsChanged(
 362     mojo::View* view,
 363     const mojo::ViewportMetrics& old_metrics,
 364     const mojo::ViewportMetrics& new_metrics) {
 365   InitSetupAndLoadIfNecessary();
 366 }
 367
 368 void HTMLDocument::OnViewDestroyed(View* view) {
 369   DCHECK_EQ(view, root_);
 370   root_ = nullptr;
 371   delete this;
 372   mojo::ApplicationImpl::Terminate();
 373 }
 374
 375 void HTMLDocument::OnViewInputEvent(View* view, const mojo::EventPtr& event) {
 376   if (event->pointer_data) {
 377     // Blink expects coordintes to be in DIPs.
 378     event->pointer_data->x /= setup_->device_pixel_ratio();
 379     event->pointer_data->y /= setup_->device_pixel_ratio();
 380     event->pointer_data->screen_x /= setup_->device_pixel_ratio();
 381     event->pointer_data->screen_y /= setup_->device_pixel_ratio();
 382   }
 383
 384   if ((event->action == mojo::EVENT_TYPE_POINTER_DOWN ||
 385        event->action == mojo::EVENT_TYPE_POINTER_UP ||
 386        event->action == mojo::EVENT_TYPE_POINTER_CANCEL ||
 387        event->action == mojo::EVENT_TYPE_POINTER_MOVE) &&
 388       event->pointer_data->kind == mojo::POINTER_KIND_TOUCH) {
 389     touch_handler_->OnTouchEvent(*event);
 390     return;
 391   }
 392   scoped_ptr<blink::WebInputEvent> web_event =
 393       event.To<scoped_ptr<blink::WebInputEvent>>();
 394   if (web_event)
 395     web_view_->handleInputEvent(*web_event);
 396 }
 397
 398 media::MediaPermission* HTMLDocument::GetMediaPermission() {
 399   if (!media_permission_)
 400     media_permission_.reset(new media::DefaultMediaPermission(true));
 401   return media_permission_.get();
 402 }
 403
 404 media::CdmFactory* HTMLDocument::GetCdmFactory() {
 405   if (!cdm_factory_)
 406     cdm_factory_.reset(new media::DefaultCdmFactory());
 407   return cdm_factory_.get();
 408 }
 409
 410 }  // namespace html_viewer