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       next_get_render_view_request_id_(0) {
  36 }
  37
  38 BrowserPluginEmbedder::~BrowserPluginEmbedder() {
  39   CleanUp();
  40 }
  41
  42 // static
  43 BrowserPluginEmbedder* BrowserPluginEmbedder::Create(
  44     WebContentsImpl* web_contents) {
  45   if (factory_)
  46     return factory_->CreateBrowserPluginEmbedder(web_contents);
  47   return new BrowserPluginEmbedder(web_contents);
  48 }
  49
  50 void BrowserPluginEmbedder::DragEnteredGuest(BrowserPluginGuest* guest) {
  51   guest_dragging_over_ = guest->AsWeakPtr();
  52 }
  53
  54 void BrowserPluginEmbedder::DragLeftGuest(BrowserPluginGuest* guest) {
  55   // Avoid race conditions in switching between guests being hovered over by
  56   // only un-setting if the caller is marked as the guest being dragged over.
  57   if (guest_dragging_over_.get() == guest) {
  58     guest_dragging_over_.reset();
  59   }
  60 }
  61
  62 void BrowserPluginEmbedder::StartDrag(BrowserPluginGuest* guest) {
  63   guest_started_drag_ = guest->AsWeakPtr();
  64 }
  65
  66 void BrowserPluginEmbedder::StopDrag(BrowserPluginGuest* guest) {
  67   if (guest_started_drag_.get() == guest) {
  68     guest_started_drag_.reset();
  69   }
  70 }
  71
  72 void BrowserPluginEmbedder::GetRenderViewHostAtPosition(
  73     int x, int y, const WebContents::GetRenderViewHostCallback& callback) {
  74   // Store the callback so we can call it later when we have the response.
  75   pending_get_render_view_callbacks_.insert(
  76       std::make_pair(next_get_render_view_request_id_, callback));
  77   Send(new BrowserPluginMsg_PluginAtPositionRequest(
  78       routing_id(),
  79       next_get_render_view_request_id_,
  80       gfx::Point(x, y)));
  81   ++next_get_render_view_request_id_;
  82 }
  83
  84 WebContentsImpl* BrowserPluginEmbedder::GetWebContents() {
  85   return static_cast<WebContentsImpl*>(web_contents());
  86 }
  87
  88 bool BrowserPluginEmbedder::DidSendScreenRectsCallback(
  89    BrowserPluginGuest* guest) {
  90   static_cast<RenderViewHostImpl*>(
  91       guest->GetWebContents()->GetRenderViewHost())->SendScreenRects();
  92   // Not handled => Iterate over all guests.
  93   return false;
  94 }
  95
  96 void BrowserPluginEmbedder::DidSendScreenRects() {
  97   GetBrowserPluginGuestManager()->ForEachGuest(GetWebContents(), base::Bind(
  98       &BrowserPluginEmbedder::DidSendScreenRectsCallback,
  99       base::Unretained(this)));
 100 }
 101
 102 bool BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback(
 103     const NativeWebKeyboardEvent& event,
 104     BrowserPluginGuest* guest) {
 105   return guest->UnlockMouseIfNecessary(event);
 106 }
 107
 108 bool BrowserPluginEmbedder::HandleKeyboardEvent(
 109     const NativeWebKeyboardEvent& event) {
 110   if ((event.type != blink::WebInputEvent::RawKeyDown) ||
 111       (event.windowsKeyCode != ui::VKEY_ESCAPE) ||
 112       (event.modifiers & blink::WebInputEvent::InputModifiers)) {
 113     return false;
 114   }
 115
 116   return GetBrowserPluginGuestManager()->ForEachGuest(GetWebContents(),
 117       base::Bind(&BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback,
 118                  base::Unretained(this),
 119                  event));
 120 }
 121
 122 bool BrowserPluginEmbedder::SetZoomLevelCallback(
 123     double level, BrowserPluginGuest* guest) {
 124   guest->GetWebContents()->SetZoomLevel(level);
 125   // Not handled => Iterate over all guests.
 126   return false;
 127 }
 128
 129 void BrowserPluginEmbedder::SetZoomLevel(double level) {
 130   GetBrowserPluginGuestManager()->ForEachGuest(GetWebContents(), base::Bind(
 131       &BrowserPluginEmbedder::SetZoomLevelCallback,
 132       base::Unretained(this),
 133       level));
 134 }
 135
 136 void BrowserPluginEmbedder::RenderProcessGone(base::TerminationStatus status) {
 137   CleanUp();
 138 }
 139
 140 bool BrowserPluginEmbedder::OnMessageReceived(const IPC::Message& message) {
 141   bool handled = true;
 142   IPC_BEGIN_MESSAGE_MAP(BrowserPluginEmbedder, message)
 143     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_AllocateInstanceID,
 144                         OnAllocateInstanceID)
 145     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_Attach, OnAttach)
 146     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_PluginAtPositionResponse,
 147                         OnPluginAtPositionResponse)
 148     IPC_MESSAGE_HANDLER_GENERIC(DragHostMsg_UpdateDragCursor,
 149                                 OnUpdateDragCursor(&handled));
 150     IPC_MESSAGE_UNHANDLED(handled = false)
 151   IPC_END_MESSAGE_MAP()
 152   return handled;
 153 }
 154
 155 void BrowserPluginEmbedder::DragSourceEndedAt(int client_x, int client_y,
 156     int screen_x, int screen_y, blink::WebDragOperation operation) {
 157   if (guest_started_drag_.get()) {
 158     gfx::Point guest_offset =
 159         guest_started_drag_->GetScreenCoordinates(gfx::Point());
 160     guest_started_drag_->DragSourceEndedAt(client_x - guest_offset.x(),
 161         client_y - guest_offset.y(), screen_x, screen_y, operation);
 162   }
 163 }
 164
 165 void BrowserPluginEmbedder::DragSourceMovedTo(int client_x, int client_y,
 166                                               int screen_x, int screen_y) {
 167   if (guest_started_drag_.get()) {
 168     gfx::Point guest_offset =
 169         guest_started_drag_->GetScreenCoordinates(gfx::Point());
 170     guest_started_drag_->DragSourceMovedTo(client_x - guest_offset.x(),
 171         client_y - guest_offset.y(), screen_x, screen_y);
 172   }
 173 }
 174
 175 void BrowserPluginEmbedder::SystemDragEnded() {
 176   if (guest_started_drag_.get() &&
 177       (guest_started_drag_.get() != guest_dragging_over_.get()))
 178     guest_started_drag_->EndSystemDrag();
 179   guest_started_drag_.reset();
 180   guest_dragging_over_.reset();
 181 }
 182
 183 void BrowserPluginEmbedder::OnUpdateDragCursor(bool* handled) {
 184   *handled = (guest_dragging_over_.get() != NULL);
 185 }
 186
 187 void BrowserPluginEmbedder::CleanUp() {
 188   // CleanUp gets called when BrowserPluginEmbedder's WebContents goes away
 189   // or the associated RenderViewHost is destroyed or swapped out. Therefore we
 190   // don't need to care about the pending callbacks anymore.
 191   pending_get_render_view_callbacks_.clear();
 192 }
 193
 194 BrowserPluginGuestManager*
 195     BrowserPluginEmbedder::GetBrowserPluginGuestManager() {
 196   BrowserPluginGuestManager* guest_manager =
 197       GetWebContents()->GetBrowserPluginGuestManager();
 198   if (!guest_manager) {
 199     guest_manager = BrowserPluginGuestManager::Create();
 200     GetWebContents()->GetBrowserContext()->SetUserData(
 201         browser_plugin::kBrowserPluginGuestManagerKeyName, guest_manager);
 202   }
 203   return guest_manager;
 204 }
 205
 206 void BrowserPluginEmbedder::OnAllocateInstanceID(int request_id) {
 207   int instance_id = GetBrowserPluginGuestManager()->get_next_instance_id();
 208   Send(new BrowserPluginMsg_AllocateInstanceID_ACK(
 209       routing_id(), request_id, instance_id));
 210 }
 211
 212 void BrowserPluginEmbedder::OnAttach(
 213     int instance_id,
 214     const BrowserPluginHostMsg_Attach_Params& params,
 215     const base::DictionaryValue& extra_params) {
 216   if (!GetBrowserPluginGuestManager()->CanEmbedderAccessInstanceIDMaybeKill(
 217           GetWebContents()->GetRenderProcessHost()->GetID(), instance_id))
 218     return;
 219
 220   BrowserPluginGuest* guest =
 221       GetBrowserPluginGuestManager()->GetGuestByInstanceID(
 222           instance_id, GetWebContents()->GetRenderProcessHost()->GetID());
 223
 224   if (guest) {
 225     // There is an implicit order expectation here:
 226     // 1. The content embedder is made aware of the attachment.
 227     // 2. BrowserPluginGuest::Attach is called.
 228     // 3. The content embedder issues queued events if any that happened
 229     //    prior to attachment.
 230     GetContentClient()->browser()->GuestWebContentsAttached(
 231         guest->GetWebContents(),
 232         GetWebContents(),
 233         extra_params);
 234     guest->Attach(GetWebContents(), params, extra_params);
 235     return;
 236   }
 237
 238   scoped_ptr<base::DictionaryValue> copy_extra_params(extra_params.DeepCopy());
 239   guest = GetBrowserPluginGuestManager()->CreateGuest(
 240       GetWebContents()->GetSiteInstance(),
 241       instance_id, params,
 242       copy_extra_params.Pass());
 243   if (guest) {
 244     GetContentClient()->browser()->GuestWebContentsAttached(
 245         guest->GetWebContents(),
 246         GetWebContents(),
 247         extra_params);
 248     guest->Initialize(params, GetWebContents());
 249   }
 250 }
 251
 252 void BrowserPluginEmbedder::OnPluginAtPositionResponse(
 253     int instance_id, int request_id, const gfx::Point& position) {
 254   const std::map<int, WebContents::GetRenderViewHostCallback>::iterator
 255       callback_iter = pending_get_render_view_callbacks_.find(request_id);
 256   if (callback_iter == pending_get_render_view_callbacks_.end())
 257     return;
 258
 259   RenderViewHost* render_view_host;
 260   BrowserPluginGuest* guest = NULL;
 261   if (instance_id != browser_plugin::kInstanceIDNone) {
 262     guest = GetBrowserPluginGuestManager()->GetGuestByInstanceID(
 263         instance_id, GetWebContents()->GetRenderProcessHost()->GetID());
 264   }
 265
 266   if (guest)
 267     render_view_host = guest->GetWebContents()->GetRenderViewHost();
 268   else  // No plugin, use embedder's RenderViewHost.
 269     render_view_host = GetWebContents()->GetRenderViewHost();
 270
 271   callback_iter->second.Run(render_view_host, position.x(), position.y());
 272   pending_get_render_view_callbacks_.erase(callback_iter);
 273 }
 274
 275 }  // namespace content