src/content/browser/browser_plugin/browser_plugin_embedder.cc

   1 // Copyright (c) 2012 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 "content/browser/browser_plugin/browser_plugin_embedder.h"
   6
   7 #include "base/values.h"
   8 #include "content/browser/browser_plugin/browser_plugin_guest.h"
   9 #include "content/browser/browser_plugin/browser_plugin_guest_manager.h"
  10 #include "content/browser/browser_plugin/browser_plugin_host_factory.h"
  11 #include "content/browser/renderer_host/render_view_host_impl.h"
  12 #include "content/browser/web_contents/web_contents_impl.h"
  13 #include "content/common/browser_plugin/browser_plugin_constants.h"
  14 #include "content/common/browser_plugin/browser_plugin_messages.h"
  15 #include "content/common/drag_messages.h"
  16 #include "content/common/gpu/gpu_messages.h"
  17 #include "content/public/browser/browser_context.h"
  18 #include "content/public/browser/content_browser_client.h"
  19 #include "content/public/browser/native_web_keyboard_event.h"
  20 #include "content/public/browser/render_view_host.h"
  21 #include "content/public/browser/user_metrics.h"
  22 #include "content/public/common/content_switches.h"
  23 #include "content/public/common/result_codes.h"
  24 #include "content/public/common/url_constants.h"
  25 #include "net/base/escape.h"
  26 #include "ui/events/keycodes/keyboard_codes.h"
  27
  28 namespace content {
  29
  30 // static
  31 BrowserPluginHostFactory* BrowserPluginEmbedder::factory_ = NULL;
  32
  33 BrowserPluginEmbedder::BrowserPluginEmbedder(WebContentsImpl* web_contents)
  34     : WebContentsObserver(web_contents),
  35       weak_ptr_factory_(this) {
  36 }
  37
  38 BrowserPluginEmbedder::~BrowserPluginEmbedder() {
  39 }
  40
  41 // static
  42 BrowserPluginEmbedder* BrowserPluginEmbedder::Create(
  43     WebContentsImpl* web_contents) {
  44   if (factory_)
  45     return factory_->CreateBrowserPluginEmbedder(web_contents);
  46   return new BrowserPluginEmbedder(web_contents);
  47 }
  48
  49 void BrowserPluginEmbedder::DragEnteredGuest(BrowserPluginGuest* guest) {
  50   guest_dragging_over_ = guest->AsWeakPtr();
  51 }
  52
  53 void BrowserPluginEmbedder::DragLeftGuest(BrowserPluginGuest* guest) {
  54   // Avoid race conditions in switching between guests being hovered over by
  55   // only un-setting if the caller is marked as the guest being dragged over.
  56   if (guest_dragging_over_.get() == guest) {
  57     guest_dragging_over_.reset();
  58   }
  59 }
  60
  61 void BrowserPluginEmbedder::StartDrag(BrowserPluginGuest* guest) {
  62   guest_started_drag_ = guest->AsWeakPtr();
  63 }
  64
  65 WebContentsImpl* BrowserPluginEmbedder::GetWebContents() const {
  66   return static_cast<WebContentsImpl*>(web_contents());
  67 }
  68
  69 BrowserPluginGuestManager*
  70 BrowserPluginEmbedder::GetBrowserPluginGuestManager() const {
  71   return BrowserPluginGuestManager::FromBrowserContext(
  72       GetWebContents()->GetBrowserContext());
  73 }
  74
  75 bool BrowserPluginEmbedder::DidSendScreenRectsCallback(
  76    BrowserPluginGuest* guest) {
  77   static_cast<RenderViewHostImpl*>(
  78       guest->GetWebContents()->GetRenderViewHost())->SendScreenRects();
  79   // Not handled => Iterate over all guests.
  80   return false;
  81 }
  82
  83 void BrowserPluginEmbedder::DidSendScreenRects() {
  84   BrowserPluginGuestManager::FromBrowserContext(
  85       GetWebContents()->GetBrowserContext())->ForEachGuest(
  86           GetWebContents(), base::Bind(
  87               &BrowserPluginEmbedder::DidSendScreenRectsCallback,
  88               base::Unretained(this)));
  89 }
  90
  91 bool BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback(
  92     const NativeWebKeyboardEvent& event,
  93     BrowserPluginGuest* guest) {
  94   return guest->UnlockMouseIfNecessary(event);
  95 }
  96
  97 bool BrowserPluginEmbedder::HandleKeyboardEvent(
  98     const NativeWebKeyboardEvent& event) {
  99   if ((event.type != blink::WebInputEvent::RawKeyDown) ||
 100       (event.windowsKeyCode != ui::VKEY_ESCAPE) ||
 101       (event.modifiers & blink::WebInputEvent::InputModifiers)) {
 102     return false;
 103   }
 104
 105   return GetBrowserPluginGuestManager()->ForEachGuest(
 106       GetWebContents(),
 107       base::Bind(&BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback,
 108                  base::Unretained(this),
 109                  event));
 110 }
 111
 112 bool BrowserPluginEmbedder::SetZoomLevelCallback(
 113     double level, BrowserPluginGuest* guest) {
 114   double zoom_factor = content::ZoomLevelToZoomFactor(level);
 115   guest->SetZoom(zoom_factor);
 116   // Not handled => Iterate over all guests.
 117   return false;
 118 }
 119
 120 void BrowserPluginEmbedder::SetZoomLevel(double level) {
 121   GetBrowserPluginGuestManager()->ForEachGuest(
 122       GetWebContents(), base::Bind(
 123           &BrowserPluginEmbedder::SetZoomLevelCallback,
 124           base::Unretained(this),
 125           level));
 126 }
 127
 128 bool BrowserPluginEmbedder::OnMessageReceived(const IPC::Message& message) {
 129   bool handled = true;
 130   IPC_BEGIN_MESSAGE_MAP(BrowserPluginEmbedder, message)
 131     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_AllocateInstanceID,
 132                         OnAllocateInstanceID)
 133     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_Attach, OnAttach)
 134     IPC_MESSAGE_HANDLER_GENERIC(DragHostMsg_UpdateDragCursor,
 135                                 OnUpdateDragCursor(&handled));
 136     IPC_MESSAGE_UNHANDLED(handled = false)
 137   IPC_END_MESSAGE_MAP()
 138   return handled;
 139 }
 140
 141 void BrowserPluginEmbedder::DragSourceEndedAt(int client_x, int client_y,
 142     int screen_x, int screen_y, blink::WebDragOperation operation) {
 143   if (guest_started_drag_.get()) {
 144     gfx::Point guest_offset =
 145         guest_started_drag_->GetScreenCoordinates(gfx::Point());
 146     guest_started_drag_->DragSourceEndedAt(client_x - guest_offset.x(),
 147         client_y - guest_offset.y(), screen_x, screen_y, operation);
 148   }
 149 }
 150
 151 void BrowserPluginEmbedder::SystemDragEnded() {
 152   // When the embedder's drag/drop operation ends, we need to pass the message
 153   // to the guest that initiated the drag/drop operation. This will ensure that
 154   // the guest's RVH state is reset properly.
 155   if (guest_started_drag_.get())
 156     guest_started_drag_->EndSystemDrag();
 157   guest_started_drag_.reset();
 158   guest_dragging_over_.reset();
 159 }
 160
 161 void BrowserPluginEmbedder::OnUpdateDragCursor(bool* handled) {
 162   *handled = (guest_dragging_over_.get() != NULL);
 163 }
 164
 165 void BrowserPluginEmbedder::OnAllocateInstanceID(int request_id) {
 166   int instance_id = GetBrowserPluginGuestManager()->GetNextInstanceID();
 167   Send(new BrowserPluginMsg_AllocateInstanceID_ACK(
 168       routing_id(), request_id, instance_id));
 169 }
 170
 171 void BrowserPluginEmbedder::OnGuestCallback(
 172     int instance_id,
 173     const BrowserPluginHostMsg_Attach_Params& params,
 174     const base::DictionaryValue* extra_params,
 175     BrowserPluginGuest* guest) {
 176   BrowserPluginGuestManager* guest_manager = GetBrowserPluginGuestManager();
 177   if (guest) {
 178     // There is an implicit order expectation here:
 179     // 1. The content embedder is made aware of the attachment.
 180     // 2. BrowserPluginGuest::Attach is called.
 181     // 3. The content embedder issues queued events if any that happened
 182     //    prior to attachment.
 183     GetContentClient()->browser()->GuestWebContentsAttached(
 184         guest->GetWebContents(),
 185         GetWebContents(),
 186         *extra_params);
 187     guest->Attach(GetWebContents(), params, *extra_params);
 188     return;
 189   }
 190
 191   scoped_ptr<base::DictionaryValue> copy_extra_params(extra_params->DeepCopy());
 192   guest = guest_manager->CreateGuest(
 193       GetWebContents()->GetSiteInstance(),
 194       instance_id, params,
 195       copy_extra_params.Pass());
 196   if (guest) {
 197     GetContentClient()->browser()->GuestWebContentsAttached(
 198         guest->GetWebContents(),
 199         GetWebContents(),
 200         *extra_params);
 201     guest->Initialize(params, GetWebContents());
 202   }
 203 }
 204
 205 void BrowserPluginEmbedder::OnAttach(
 206     int instance_id,
 207     const BrowserPluginHostMsg_Attach_Params& params,
 208     const base::DictionaryValue& extra_params) {
 209   GetBrowserPluginGuestManager()->MaybeGetGuestByInstanceIDOrKill(
 210       instance_id, GetWebContents()->GetRenderProcessHost()->GetID(),
 211       base::Bind(&BrowserPluginEmbedder::OnGuestCallback,
 212                  base::Unretained(this),
 213                  instance_id,
 214                  params,
 215                  &extra_params));
 216 }
 217
 218 }  // namespace content