components/plugins/renderer/webview_plugin.cc

   1 // Copyright 2013 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/plugins/renderer/webview_plugin.h"
   6
   7 #include "base/message_loop/message_loop.h"
   8 #include "base/metrics/histogram.h"
   9 #include "base/numerics/safe_conversions.h"
  10 #include "content/public/common/web_preferences.h"
  11 #include "content/public/renderer/render_view.h"
  12 #include "skia/ext/platform_canvas.h"
  13 #include "third_party/WebKit/public/platform/WebSize.h"
  14 #include "third_party/WebKit/public/platform/WebURL.h"
  15 #include "third_party/WebKit/public/platform/WebURLRequest.h"
  16 #include "third_party/WebKit/public/platform/WebURLResponse.h"
  17 #include "third_party/WebKit/public/web/WebDocument.h"
  18 #include "third_party/WebKit/public/web/WebElement.h"
  19 #include "third_party/WebKit/public/web/WebInputEvent.h"
  20 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  21 #include "third_party/WebKit/public/web/WebPluginContainer.h"
  22 #include "third_party/WebKit/public/web/WebView.h"
  23
  24 using blink::WebCanvas;
  25 using blink::WebCursorInfo;
  26 using blink::WebDragData;
  27 using blink::WebDragOperationsMask;
  28 using blink::WebImage;
  29 using blink::WebInputEvent;
  30 using blink::WebLocalFrame;
  31 using blink::WebMouseEvent;
  32 using blink::WebPlugin;
  33 using blink::WebPluginContainer;
  34 using blink::WebPoint;
  35 using blink::WebRect;
  36 using blink::WebSize;
  37 using blink::WebString;
  38 using blink::WebURLError;
  39 using blink::WebURLRequest;
  40 using blink::WebURLResponse;
  41 using blink::WebVector;
  42 using blink::WebView;
  43 using content::WebPreferences;
  44
  45 WebViewPlugin::WebViewPlugin(WebViewPlugin::Delegate* delegate,
  46                              const WebPreferences& preferences)
  47     : delegate_(delegate),
  48       container_(NULL),
  49       web_view_(WebView::create(this)),
  50       finished_loading_(false),
  51       focused_(false) {
  52   // ApplyWebPreferences before making a WebLocalFrame so that the frame sees a
  53   // consistent view of our preferences.
  54   content::RenderView::ApplyWebPreferences(preferences, web_view_);
  55   web_frame_ = WebLocalFrame::create(this);
  56   web_view_->setMainFrame(web_frame_);
  57 }
  58
  59 // static
  60 WebViewPlugin* WebViewPlugin::Create(WebViewPlugin::Delegate* delegate,
  61                                      const WebPreferences& preferences,
  62                                      const std::string& html_data,
  63                                      const GURL& url) {
  64   DCHECK(url.is_valid()) << "Blink requires the WebView to have a valid URL.";
  65   WebViewPlugin* plugin = new WebViewPlugin(delegate, preferences);
  66   plugin->web_view()->mainFrame()->loadHTMLString(html_data, url);
  67   return plugin;
  68 }
  69
  70 WebViewPlugin::~WebViewPlugin() {
  71   web_view_->close();
  72   web_frame_->close();
  73 }
  74
  75 void WebViewPlugin::ReplayReceivedData(WebPlugin* plugin) {
  76   if (!response_.isNull()) {
  77     plugin->didReceiveResponse(response_);
  78     size_t total_bytes = 0;
  79     for (std::list<std::string>::iterator it = data_.begin(); it != data_.end();
  80          ++it) {
  81       plugin->didReceiveData(
  82           it->c_str(), base::checked_cast<int, size_t>(it->length()));
  83       total_bytes += it->length();
  84     }
  85     UMA_HISTOGRAM_MEMORY_KB(
  86         "PluginDocument.Memory",
  87         (base::checked_cast<int, size_t>(total_bytes / 1024)));
  88     UMA_HISTOGRAM_COUNTS(
  89         "PluginDocument.NumChunks",
  90         (base::checked_cast<int, size_t>(data_.size())));
  91   }
  92   // We need to transfer the |focused_| to new plugin after it loaded.
  93   if (focused_) {
  94     plugin->updateFocus(true, blink::WebFocusTypeNone);
  95   }
  96   if (finished_loading_) {
  97     plugin->didFinishLoading();
  98   }
  99   if (error_) {
 100     plugin->didFailLoading(*error_);
 101   }
 102 }
 103
 104 void WebViewPlugin::RestoreTitleText() {
 105   if (container_)
 106     container_->element().setAttribute("title", old_title_);
 107 }
 108
 109 WebPluginContainer* WebViewPlugin::container() const { return container_; }
 110
 111 bool WebViewPlugin::initialize(WebPluginContainer* container) {
 112   container_ = container;
 113   if (container_) {
 114     old_title_ = container_->element().getAttribute("title");
 115
 116     // Propagate device scale to inner webview to load the correct resource
 117     // when images have a "srcset" attribute.
 118     web_view_->setDeviceScaleFactor(container_->deviceScaleFactor());
 119   }
 120   return true;
 121 }
 122
 123 void WebViewPlugin::destroy() {
 124   if (delegate_) {
 125     delegate_->PluginDestroyed();
 126     delegate_ = NULL;
 127   }
 128   container_ = NULL;
 129   base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 130 }
 131
 132 v8::Local<v8::Object> WebViewPlugin::v8ScriptableObject(v8::Isolate* isolate) {
 133   if (!delegate_)
 134     return v8::Local<v8::Object>();
 135
 136   return delegate_->GetV8ScriptableObject(isolate);
 137 }
 138
 139 void WebViewPlugin::layoutIfNeeded() {
 140   web_view_->layout();
 141 }
 142
 143 void WebViewPlugin::paint(WebCanvas* canvas, const WebRect& rect) {
 144   gfx::Rect paint_rect = gfx::IntersectRects(rect_, rect);
 145   if (paint_rect.IsEmpty())
 146     return;
 147
 148   paint_rect.Offset(-rect_.x(), -rect_.y());
 149
 150   canvas->save();
 151   canvas->translate(SkIntToScalar(rect_.x()), SkIntToScalar(rect_.y()));
 152
 153   // Apply inverse device scale factor, as the outer webview has already
 154   // applied it, and the inner webview will apply it again.
 155   SkScalar inverse_scale =
 156       SkFloatToScalar(1.0 / container_->deviceScaleFactor());
 157   canvas->scale(inverse_scale, inverse_scale);
 158
 159   web_view_->paint(canvas, paint_rect);
 160
 161   canvas->restore();
 162 }
 163
 164 // Coordinates are relative to the containing window.
 165 void WebViewPlugin::updateGeometry(const WebRect& window_rect,
 166                                    const WebRect& clip_rect,
 167                                    const WebRect& unobscured_rect,
 168                                    const WebVector<WebRect>& cut_outs_rects,
 169                                    bool is_visible) {
 170   if (static_cast<gfx::Rect>(window_rect) != rect_) {
 171     rect_ = window_rect;
 172     WebSize newSize(window_rect.width, window_rect.height);
 173     web_view_->resize(newSize);
 174   }
 175 }
 176
 177 void WebViewPlugin::updateFocus(bool focused, blink::WebFocusType focus_type) {
 178   focused_ = focused;
 179 }
 180
 181 bool WebViewPlugin::acceptsInputEvents() { return true; }
 182
 183 bool WebViewPlugin::handleInputEvent(const WebInputEvent& event,
 184                                      WebCursorInfo& cursor) {
 185   // For tap events, don't handle them. They will be converted to
 186   // mouse events later and passed to here.
 187   if (event.type == WebInputEvent::GestureTap)
 188     return false;
 189
 190   // For LongPress events we return false, since otherwise the context menu will
 191   // be suppressed. https://crbug.com/482842
 192   if (event.type == WebInputEvent::GestureLongPress)
 193     return false;
 194
 195   if (event.type == WebInputEvent::ContextMenu) {
 196     if (delegate_) {
 197       const WebMouseEvent& mouse_event =
 198           reinterpret_cast<const WebMouseEvent&>(event);
 199       delegate_->ShowContextMenu(mouse_event);
 200     }
 201     return true;
 202   }
 203   current_cursor_ = cursor;
 204   bool handled = web_view_->handleInputEvent(event);
 205   cursor = current_cursor_;
 206
 207   return handled;
 208 }
 209
 210 void WebViewPlugin::didReceiveResponse(const WebURLResponse& response) {
 211   DCHECK(response_.isNull());
 212   response_ = response;
 213 }
 214
 215 void WebViewPlugin::didReceiveData(const char* data, int data_length) {
 216   data_.push_back(std::string(data, data_length));
 217 }
 218
 219 void WebViewPlugin::didFinishLoading() {
 220   DCHECK(!finished_loading_);
 221   finished_loading_ = true;
 222 }
 223
 224 void WebViewPlugin::didFailLoading(const WebURLError& error) {
 225   DCHECK(!error_.get());
 226   error_.reset(new WebURLError(error));
 227 }
 228
 229 bool WebViewPlugin::acceptsLoadDrops() { return false; }
 230
 231 void WebViewPlugin::setToolTipText(const WebString& text,
 232                                    blink::WebTextDirection hint) {
 233   if (container_)
 234     container_->element().setAttribute("title", text);
 235 }
 236
 237 void WebViewPlugin::startDragging(WebLocalFrame*,
 238                                   const WebDragData&,
 239                                   WebDragOperationsMask,
 240                                   const WebImage&,
 241                                   const WebPoint&) {
 242   // Immediately stop dragging.
 243   web_view_->dragSourceSystemDragEnded();
 244 }
 245
 246 bool WebViewPlugin::allowsBrokenNullLayerTreeView() const {
 247   return true;
 248 }
 249
 250 void WebViewPlugin::didInvalidateRect(const WebRect& rect) {
 251   if (container_)
 252     container_->invalidateRect(rect);
 253 }
 254
 255 void WebViewPlugin::didChangeCursor(const WebCursorInfo& cursor) {
 256   current_cursor_ = cursor;
 257 }
 258
 259 void WebViewPlugin::scheduleAnimation() {
 260   if (container_)
 261     container_->invalidate();
 262 }
 263
 264 void WebViewPlugin::didClearWindowObject(WebLocalFrame* frame) {
 265   if (delegate_)
 266     delegate_->BindWebFrame(frame);
 267 }
 268
 269 void WebViewPlugin::didReceiveResponse(WebLocalFrame* frame,
 270                                        unsigned identifier,
 271                                        const WebURLResponse& response) {
 272   WebFrameClient::didReceiveResponse(frame, identifier, response);
 273 }