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/renderer_host/render_view_host_impl.h"
  10 #include "content/browser/web_contents/web_contents_impl.h"
  11 #include "content/common/browser_plugin/browser_plugin_constants.h"
  12 #include "content/common/browser_plugin/browser_plugin_messages.h"
  13 #include "content/common/drag_messages.h"
  14 #include "content/common/gpu/gpu_messages.h"
  15 #include "content/public/browser/browser_context.h"
  16 #include "content/public/browser/browser_plugin_guest_manager.h"
  17 #include "content/public/browser/content_browser_client.h"
  18 #include "content/public/browser/native_web_keyboard_event.h"
  19 #include "content/public/browser/render_view_host.h"
  20 #include "content/public/browser/user_metrics.h"
  21 #include "content/public/common/content_switches.h"
  22 #include "content/public/common/result_codes.h"
  23 #include "content/public/common/url_constants.h"
  24 #include "net/base/escape.h"
  25 #include "third_party/WebKit/public/web/WebFindOptions.h"
  26 #include "ui/events/keycodes/keyboard_codes.h"
  27
  28 namespace content {
  29
  30 BrowserPluginEmbedder::BrowserPluginEmbedder(WebContentsImpl* web_contents)
  31     : WebContentsObserver(web_contents),
  32       guest_drag_ending_(false),
  33       weak_ptr_factory_(this) {
  34 }
  35
  36 BrowserPluginEmbedder::~BrowserPluginEmbedder() {
  37 }
  38
  39 // static
  40 BrowserPluginEmbedder* BrowserPluginEmbedder::Create(
  41     WebContentsImpl* web_contents) {
  42   return new BrowserPluginEmbedder(web_contents);
  43 }
  44
  45 void BrowserPluginEmbedder::DragEnteredGuest(BrowserPluginGuest* guest) {
  46   guest_dragging_over_ = guest->AsWeakPtr();
  47 }
  48
  49 void BrowserPluginEmbedder::DragLeftGuest(BrowserPluginGuest* guest) {
  50   // Avoid race conditions in switching between guests being hovered over by
  51   // only un-setting if the caller is marked as the guest being dragged over.
  52   if (guest_dragging_over_.get() == guest) {
  53     guest_dragging_over_.reset();
  54   }
  55 }
  56
  57 void BrowserPluginEmbedder::StartDrag(BrowserPluginGuest* guest) {
  58   guest_started_drag_ = guest->AsWeakPtr();
  59   guest_drag_ending_ = false;
  60 }
  61
  62 WebContentsImpl* BrowserPluginEmbedder::GetWebContents() const {
  63   return static_cast<WebContentsImpl*>(web_contents());
  64 }
  65
  66 BrowserPluginGuestManager*
  67 BrowserPluginEmbedder::GetBrowserPluginGuestManager() const {
  68   return GetWebContents()->GetBrowserContext()->GetGuestManager();
  69 }
  70
  71 void BrowserPluginEmbedder::ClearGuestDragStateIfApplicable() {
  72   // The order at which we observe SystemDragEnded() and DragSourceEndedAt() is
  73   // platform dependent.
  74   // In OSX, we see SystemDragEnded() first, where in aura, we see
  75   // DragSourceEndedAt() first. For this reason, we check if both methods were
  76   // called before resetting |guest_started_drag_|.
  77   if (guest_drag_ending_) {
  78     if (guest_started_drag_)
  79       guest_started_drag_.reset();
  80   } else {
  81     guest_drag_ending_ = true;
  82   }
  83 }
  84
  85 bool BrowserPluginEmbedder::DidSendScreenRectsCallback(
  86    WebContents* guest_web_contents) {
  87   static_cast<RenderViewHostImpl*>(
  88       guest_web_contents->GetRenderViewHost())->SendScreenRects();
  89   // Not handled => Iterate over all guests.
  90   return false;
  91 }
  92
  93 void BrowserPluginEmbedder::DidSendScreenRects() {
  94   GetBrowserPluginGuestManager()->ForEachGuest(
  95           GetWebContents(), base::Bind(
  96               &BrowserPluginEmbedder::DidSendScreenRectsCallback,
  97               base::Unretained(this)));
  98 }
  99
 100 bool BrowserPluginEmbedder::OnMessageReceived(const IPC::Message& message) {
 101   bool handled = true;
 102   IPC_BEGIN_MESSAGE_MAP(BrowserPluginEmbedder, message)
 103     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_Attach, OnAttach)
 104     IPC_MESSAGE_HANDLER_GENERIC(DragHostMsg_UpdateDragCursor,
 105                                 OnUpdateDragCursor(&handled));
 106     IPC_MESSAGE_UNHANDLED(handled = false)
 107   IPC_END_MESSAGE_MAP()
 108   return handled;
 109 }
 110
 111 void BrowserPluginEmbedder::DragSourceEndedAt(int client_x, int client_y,
 112     int screen_x, int screen_y, blink::WebDragOperation operation) {
 113   if (guest_started_drag_) {
 114     gfx::Point guest_offset =
 115         guest_started_drag_->GetScreenCoordinates(gfx::Point());
 116     guest_started_drag_->DragSourceEndedAt(client_x - guest_offset.x(),
 117         client_y - guest_offset.y(), screen_x, screen_y, operation);
 118   }
 119   ClearGuestDragStateIfApplicable();
 120 }
 121
 122 void BrowserPluginEmbedder::SystemDragEnded() {
 123   // When the embedder's drag/drop operation ends, we need to pass the message
 124   // to the guest that initiated the drag/drop operation. This will ensure that
 125   // the guest's RVH state is reset properly.
 126   if (guest_started_drag_)
 127     guest_started_drag_->EndSystemDrag();
 128   guest_dragging_over_.reset();
 129   ClearGuestDragStateIfApplicable();
 130 }
 131
 132 void BrowserPluginEmbedder::OnUpdateDragCursor(bool* handled) {
 133   *handled = (guest_dragging_over_.get() != NULL);
 134 }
 135
 136 void BrowserPluginEmbedder::OnAttach(
 137     int browser_plugin_instance_id,
 138     const BrowserPluginHostMsg_Attach_Params& params) {
 139   WebContents* guest_web_contents =
 140       GetBrowserPluginGuestManager()->GetGuestByInstanceID(
 141           GetWebContents(), browser_plugin_instance_id);
 142   if (!guest_web_contents)
 143     return;
 144   BrowserPluginGuest* guest = static_cast<WebContentsImpl*>(guest_web_contents)
 145                                   ->GetBrowserPluginGuest();
 146   guest->Attach(browser_plugin_instance_id, GetWebContents(), params);
 147 }
 148
 149 bool BrowserPluginEmbedder::HandleKeyboardEvent(
 150     const NativeWebKeyboardEvent& event) {
 151   if ((event.windowsKeyCode != ui::VKEY_ESCAPE) ||
 152       (event.modifiers & blink::WebInputEvent::InputModifiers)) {
 153     return false;
 154   }
 155
 156   bool event_consumed = false;
 157   GetBrowserPluginGuestManager()->ForEachGuest(
 158       GetWebContents(),
 159       base::Bind(&BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback,
 160                  base::Unretained(this),
 161                  &event_consumed));
 162
 163   return event_consumed;
 164 }
 165
 166 bool BrowserPluginEmbedder::Find(int request_id,
 167                                  const base::string16& search_text,
 168                                  const blink::WebFindOptions& options) {
 169   return GetBrowserPluginGuestManager()->ForEachGuest(
 170       GetWebContents(),
 171       base::Bind(&BrowserPluginEmbedder::FindInGuest,
 172                  base::Unretained(this),
 173                  request_id,
 174                  search_text,
 175                  options));
 176 }
 177
 178 bool BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback(bool* mouse_unlocked,
 179                                                            WebContents* guest) {
 180   *mouse_unlocked |= static_cast<WebContentsImpl*>(guest)
 181                          ->GetBrowserPluginGuest()
 182                          ->mouse_locked();
 183   guest->GotResponseToLockMouseRequest(false);
 184
 185   // Returns false to iterate over all guests.
 186   return false;
 187 }
 188
 189 bool BrowserPluginEmbedder::FindInGuest(int request_id,
 190                                         const base::string16& search_text,
 191                                         const blink::WebFindOptions& options,
 192                                         WebContents* guest) {
 193   if (static_cast<WebContentsImpl*>(guest)->GetBrowserPluginGuest()->Find(
 194           request_id, search_text, options)) {
 195     // There can only ever currently be one browser plugin that handles find so
 196     // we can break the iteration at this point.
 197     return true;
 198   }
 199   return false;
 200 }
 201
 202 }  // namespace content