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   WebViewPlugin* plugin = new WebViewPlugin(delegate, preferences);
  65   plugin->web_view()->mainFrame()->loadHTMLString(html_data, url);
  66   return plugin;
  67 }
  68
  69 WebViewPlugin::~WebViewPlugin() {
  70   web_view_->close();
  71   web_frame_->close();
  72 }
  73
  74 void WebViewPlugin::ReplayReceivedData(WebPlugin* plugin) {
  75   if (!response_.isNull()) {
  76     plugin->didReceiveResponse(response_);
  77     size_t total_bytes = 0;
  78     for (std::list<std::string>::iterator it = data_.begin(); it != data_.end();
  79          ++it) {
  80       plugin->didReceiveData(
  81           it->c_str(), base::checked_cast<int, size_t>(it->length()));
  82       total_bytes += it->length();
  83     }
  84     UMA_HISTOGRAM_MEMORY_KB(
  85         "PluginDocument.Memory",
  86         (base::checked_cast<int, size_t>(total_bytes / 1024)));
  87     UMA_HISTOGRAM_COUNTS(
  88         "PluginDocument.NumChunks",
  89         (base::checked_cast<int, size_t>(data_.size())));
  90   }
  91   // We need to transfer the |focused_| to new plugin after it loaded.
  92   if (focused_) {
  93     plugin->updateFocus(true);
  94   }
  95   if (finished_loading_) {
  96     plugin->didFinishLoading();
  97   }
  98   if (error_) {
  99     plugin->didFailLoading(*error_);
 100   }
 101 }
 102
 103 void WebViewPlugin::RestoreTitleText() {
 104   if (container_)
 105     container_->element().setAttribute("title", old_title_);
 106 }
 107
 108 WebPluginContainer* WebViewPlugin::container() const { return container_; }
 109
 110 bool WebViewPlugin::initialize(WebPluginContainer* container) {
 111   container_ = container;
 112   if (container_)
 113     old_title_ = container_->element().getAttribute("title");
 114   return true;
 115 }
 116
 117 void WebViewPlugin::destroy() {
 118   if (delegate_) {
 119     delegate_->PluginDestroyed();
 120     delegate_ = NULL;
 121   }
 122   container_ = NULL;
 123   base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 124 }
 125
 126 NPObject* WebViewPlugin::scriptableObject() { return NULL; }
 127
 128 struct _NPP* WebViewPlugin::pluginNPP() { return NULL; }
 129
 130 bool WebViewPlugin::getFormValue(WebString& value) { return false; }
 131
 132 void WebViewPlugin::paint(WebCanvas* canvas, const WebRect& rect) {
 133   gfx::Rect paint_rect = gfx::IntersectRects(rect_, rect);
 134   if (paint_rect.IsEmpty())
 135     return;
 136
 137   paint_rect.Offset(-rect_.x(), -rect_.y());
 138
 139   canvas->translate(SkIntToScalar(rect_.x()), SkIntToScalar(rect_.y()));
 140   canvas->save();
 141
 142   web_view_->layout();
 143   web_view_->paint(canvas, paint_rect);
 144
 145   canvas->restore();
 146 }
 147
 148 // Coordinates are relative to the containing window.
 149 void WebViewPlugin::updateGeometry(const WebRect& frame_rect,
 150                                    const WebRect& clip_rect,
 151                                    const WebVector<WebRect>& cut_out_rects,
 152                                    bool is_visible) {
 153   if (static_cast<gfx::Rect>(frame_rect) != rect_) {
 154     rect_ = frame_rect;
 155     WebSize newSize(frame_rect.width, frame_rect.height);
 156     web_view_->setFixedLayoutSize(newSize);
 157     web_view_->resize(newSize);
 158   }
 159 }
 160
 161 void WebViewPlugin::updateFocus(bool focused) {
 162   focused_ = focused;
 163 }
 164
 165 bool WebViewPlugin::acceptsInputEvents() { return true; }
 166
 167 bool WebViewPlugin::handleInputEvent(const WebInputEvent& event,
 168                                      WebCursorInfo& cursor) {
 169   // For tap events, don't handle them. They will be converted to
 170   // mouse events later and passed to here.
 171   if (event.type == WebInputEvent::GestureTap)
 172     return false;
 173
 174   if (event.type == WebInputEvent::ContextMenu) {
 175     if (delegate_) {
 176       const WebMouseEvent& mouse_event =
 177           reinterpret_cast<const WebMouseEvent&>(event);
 178       delegate_->ShowContextMenu(mouse_event);
 179     }
 180     return true;
 181   }
 182   current_cursor_ = cursor;
 183   bool handled = web_view_->handleInputEvent(event);
 184   cursor = current_cursor_;
 185
 186   return handled;
 187 }
 188
 189 void WebViewPlugin::didReceiveResponse(const WebURLResponse& response) {
 190   DCHECK(response_.isNull());
 191   response_ = response;
 192 }
 193
 194 void WebViewPlugin::didReceiveData(const char* data, int data_length) {
 195   data_.push_back(std::string(data, data_length));
 196 }
 197
 198 void WebViewPlugin::didFinishLoading() {
 199   DCHECK(!finished_loading_);
 200   finished_loading_ = true;
 201 }
 202
 203 void WebViewPlugin::didFailLoading(const WebURLError& error) {
 204   DCHECK(!error_.get());
 205   error_.reset(new WebURLError(error));
 206 }
 207
 208 bool WebViewPlugin::acceptsLoadDrops() { return false; }
 209
 210 void WebViewPlugin::setToolTipText(const WebString& text,
 211                                    blink::WebTextDirection hint) {
 212   if (container_)
 213     container_->element().setAttribute("title", text);
 214 }
 215
 216 void WebViewPlugin::startDragging(WebLocalFrame*,
 217                                   const WebDragData&,
 218                                   WebDragOperationsMask,
 219                                   const WebImage&,
 220                                   const WebPoint&) {
 221   // Immediately stop dragging.
 222   web_view_->dragSourceSystemDragEnded();
 223 }
 224
 225 bool WebViewPlugin::allowsBrokenNullLayerTreeView() const {
 226   return true;
 227 }
 228
 229 void WebViewPlugin::didInvalidateRect(const WebRect& rect) {
 230   if (container_)
 231     container_->invalidateRect(rect);
 232 }
 233
 234 void WebViewPlugin::didChangeCursor(const WebCursorInfo& cursor) {
 235   current_cursor_ = cursor;
 236 }
 237
 238 void WebViewPlugin::didClearWindowObject(WebLocalFrame* frame) {
 239   if (delegate_)
 240     delegate_->BindWebFrame(frame);
 241 }
 242
 243 void WebViewPlugin::didReceiveResponse(WebLocalFrame* frame,
 244                                        unsigned identifier,
 245                                        const WebURLResponse& response) {
 246   WebFrameClient::didReceiveResponse(frame, identifier, response);
 247 }