src/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/renderer/web_preferences.h"
  11 #include "skia/ext/platform_canvas.h"
  12 #include "third_party/WebKit/public/platform/WebSize.h"
  13 #include "third_party/WebKit/public/platform/WebURL.h"
  14 #include "third_party/WebKit/public/platform/WebURLRequest.h"
  15 #include "third_party/WebKit/public/platform/WebURLResponse.h"
  16 #include "third_party/WebKit/public/web/WebDocument.h"
  17 #include "third_party/WebKit/public/web/WebElement.h"
  18 #include "third_party/WebKit/public/web/WebInputEvent.h"
  19 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  20 #include "third_party/WebKit/public/web/WebPluginContainer.h"
  21 #include "third_party/WebKit/public/web/WebView.h"
  22 #include "webkit/common/webpreferences.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
  44 WebViewPlugin::WebViewPlugin(WebViewPlugin::Delegate* delegate)
  45     : delegate_(delegate),
  46       container_(NULL),
  47       web_view_(WebView::create(this)),
  48       web_frame_(WebLocalFrame::create(this)),
  49       finished_loading_(false),
  50       focused_(false) {
  51   web_view_->setMainFrame(web_frame_);
  52 }
  53
  54 // static
  55 WebViewPlugin* WebViewPlugin::Create(WebViewPlugin::Delegate* delegate,
  56                                      const WebPreferences& preferences,
  57                                      const std::string& html_data,
  58                                      const GURL& url) {
  59   WebViewPlugin* plugin = new WebViewPlugin(delegate);
  60   WebView* web_view = plugin->web_view();
  61   content::ApplyWebPreferences(preferences, web_view);
  62   web_view->mainFrame()->loadHTMLString(html_data, url);
  63   return plugin;
  64 }
  65
  66 WebViewPlugin::~WebViewPlugin() {
  67   web_view_->close();
  68   web_frame_->close();
  69 }
  70
  71 void WebViewPlugin::ReplayReceivedData(WebPlugin* plugin) {
  72   if (!response_.isNull()) {
  73     plugin->didReceiveResponse(response_);
  74     size_t total_bytes = 0;
  75     for (std::list<std::string>::iterator it = data_.begin(); it != data_.end();
  76          ++it) {
  77       plugin->didReceiveData(
  78           it->c_str(), base::checked_cast<int, size_t>(it->length()));
  79       total_bytes += it->length();
  80     }
  81     UMA_HISTOGRAM_MEMORY_KB(
  82         "PluginDocument.Memory",
  83         (base::checked_cast<int, size_t>(total_bytes / 1024)));
  84     UMA_HISTOGRAM_COUNTS(
  85         "PluginDocument.NumChunks",
  86         (base::checked_cast<int, size_t>(data_.size())));
  87   }
  88   // We need to transfer the |focused_| to new plugin after it loaded.
  89   if (focused_) {
  90     plugin->updateFocus(true);
  91   }
  92   if (finished_loading_) {
  93     plugin->didFinishLoading();
  94   }
  95   if (error_) {
  96     plugin->didFailLoading(*error_);
  97   }
  98 }
  99
 100 void WebViewPlugin::RestoreTitleText() {
 101   if (container_)
 102     container_->element().setAttribute("title", old_title_);
 103 }
 104
 105 WebPluginContainer* WebViewPlugin::container() const { return container_; }
 106
 107 bool WebViewPlugin::initialize(WebPluginContainer* container) {
 108   container_ = container;
 109   if (container_)
 110     old_title_ = container_->element().getAttribute("title");
 111   return true;
 112 }
 113
 114 void WebViewPlugin::destroy() {
 115   if (delegate_) {
 116     delegate_->PluginDestroyed();
 117     delegate_ = NULL;
 118   }
 119   container_ = NULL;
 120   base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 121 }
 122
 123 NPObject* WebViewPlugin::scriptableObject() { return NULL; }
 124
 125 struct _NPP* WebViewPlugin::pluginNPP() { return NULL; }
 126
 127 bool WebViewPlugin::getFormValue(WebString& value) { return false; }
 128
 129 void WebViewPlugin::paint(WebCanvas* canvas, const WebRect& rect) {
 130   gfx::Rect paint_rect = gfx::IntersectRects(rect_, rect);
 131   if (paint_rect.IsEmpty())
 132     return;
 133
 134   paint_rect.Offset(-rect_.x(), -rect_.y());
 135
 136   canvas->translate(SkIntToScalar(rect_.x()), SkIntToScalar(rect_.y()));
 137   canvas->save();
 138
 139   web_view_->layout();
 140   web_view_->paint(canvas, paint_rect);
 141
 142   canvas->restore();
 143 }
 144
 145 // Coordinates are relative to the containing window.
 146 void WebViewPlugin::updateGeometry(const WebRect& frame_rect,
 147                                    const WebRect& clip_rect,
 148                                    const WebVector<WebRect>& cut_out_rects,
 149                                    bool is_visible) {
 150   if (static_cast<gfx::Rect>(frame_rect) != rect_) {
 151     rect_ = frame_rect;
 152     WebSize newSize(frame_rect.width, frame_rect.height);
 153     web_view_->setFixedLayoutSize(newSize);
 154     web_view_->resize(newSize);
 155   }
 156 }
 157
 158 void WebViewPlugin::updateFocus(bool focused) {
 159   focused_ = focused;
 160 }
 161
 162 bool WebViewPlugin::acceptsInputEvents() { return true; }
 163
 164 bool WebViewPlugin::handleInputEvent(const WebInputEvent& event,
 165                                      WebCursorInfo& cursor) {
 166   // For tap events, don't handle them. They will be converted to
 167   // mouse events later and passed to here.
 168   if (event.type == WebInputEvent::GestureTap)
 169     return false;
 170
 171   if (event.type == WebInputEvent::ContextMenu) {
 172     if (delegate_) {
 173       const WebMouseEvent& mouse_event =
 174           reinterpret_cast<const WebMouseEvent&>(event);
 175       delegate_->ShowContextMenu(mouse_event);
 176     }
 177     return true;
 178   }
 179   current_cursor_ = cursor;
 180   bool handled = web_view_->handleInputEvent(event);
 181   cursor = current_cursor_;
 182
 183   return handled;
 184 }
 185
 186 void WebViewPlugin::didReceiveResponse(const WebURLResponse& response) {
 187   DCHECK(response_.isNull());
 188   response_ = response;
 189 }
 190
 191 void WebViewPlugin::didReceiveData(const char* data, int data_length) {
 192   data_.push_back(std::string(data, data_length));
 193 }
 194
 195 void WebViewPlugin::didFinishLoading() {
 196   DCHECK(!finished_loading_);
 197   finished_loading_ = true;
 198 }
 199
 200 void WebViewPlugin::didFailLoading(const WebURLError& error) {
 201   DCHECK(!error_.get());
 202   error_.reset(new WebURLError(error));
 203 }
 204
 205 bool WebViewPlugin::acceptsLoadDrops() { return false; }
 206
 207 void WebViewPlugin::setToolTipText(const WebString& text,
 208                                    blink::WebTextDirection hint) {
 209   if (container_)
 210     container_->element().setAttribute("title", text);
 211 }
 212
 213 void WebViewPlugin::startDragging(WebLocalFrame*,
 214                                   const WebDragData&,
 215                                   WebDragOperationsMask,
 216                                   const WebImage&,
 217                                   const WebPoint&) {
 218   // Immediately stop dragging.
 219   web_view_->dragSourceSystemDragEnded();
 220 }
 221
 222 bool WebViewPlugin::allowsBrokenNullLayerTreeView() const {
 223   return true;
 224 }
 225
 226 void WebViewPlugin::didInvalidateRect(const WebRect& rect) {
 227   if (container_)
 228     container_->invalidateRect(rect);
 229 }
 230
 231 void WebViewPlugin::didChangeCursor(const WebCursorInfo& cursor) {
 232   current_cursor_ = cursor;
 233 }
 234
 235 void WebViewPlugin::didClearWindowObject(WebLocalFrame* frame, int world_id) {
 236   if (delegate_)
 237     delegate_->BindWebFrame(frame);
 238 }
 239
 240 void WebViewPlugin::didReceiveResponse(WebLocalFrame* frame,
 241                                        unsigned identifier,
 242                                        const WebURLResponse& response) {
 243   WebFrameClient::didReceiveResponse(frame, identifier, response);
 244 }