Mouse Lock is currently supported in Pepper, but not yet supported from WebKit.

Move the render thread logic for managing the mouse lock state out of the pepper_plugin_delegate_impl, and into a higher level dispatcher for render_view_impl.

Handle mouse lock / pointer lock requests from both pepper and webkit (WebKit API not yet landed, small TODOs left in this code to enable once that lands).

BUG=109957
TEST=Pepper examples/mouse_lock and NaCl mouse lock examples still work.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=119206

Review URL: http://codereview.chromium.org/8970016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@119406 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 43 insertions, 18 deletions

diff --git a/webkit/plugins/ppapi/mock_plugin_delegate.cc b/webkit/plugins/ppapi/mock_plugin_delegate.cc
index da371c54..780bf4c 100644
--- a/webkit/plugins/ppapi/mock_plugin_delegate.cc
+++ b/webkit/plugins/ppapi/mock_plugin_delegate.cc
@@ -348,13 +348,17 @@ base::SharedMemory* MockPluginDelegate::CreateAnonymousSharedMemory(
   return ::ppapi::Preferences();
 }
 
-void MockPluginDelegate::LockMouse(PluginInstance* instance) {
-  instance->OnLockMouseACK(PP_ERROR_FAILED);
+bool MockPluginDelegate::LockMouse(PluginInstance* instance) {
+  return false;
 }
 
 void MockPluginDelegate::UnlockMouse(PluginInstance* instance) {
 }
 
+bool MockPluginDelegate::IsMouseLocked(PluginInstance* instance) {
+  return false;
+}
+
 void MockPluginDelegate::DidChangeCursor(PluginInstance* instance,
                                          const WebKit::WebCursorInfo& cursor) {
 }
diff --git a/webkit/plugins/ppapi/mock_plugin_delegate.h b/webkit/plugins/ppapi/mock_plugin_delegate.h
index fbd961a..4768080 100644
--- a/webkit/plugins/ppapi/mock_plugin_delegate.h
+++ b/webkit/plugins/ppapi/mock_plugin_delegate.h
@@ -148,8 +148,9 @@ class MockPluginDelegate : public PluginDelegate {
   virtual std::string GetFlashCommandLineArgs();
   virtual base::SharedMemory* CreateAnonymousSharedMemory(uint32_t size);
   virtual ::ppapi::Preferences GetPreferences();
-  virtual void LockMouse(PluginInstance* instance);
+  virtual bool LockMouse(PluginInstance* instance);
   virtual void UnlockMouse(PluginInstance* instance);
+  virtual bool IsMouseLocked(PluginInstance* instance);
   virtual void DidChangeCursor(PluginInstance* instance,
                                const WebKit::WebCursorInfo& cursor);
   virtual void DidReceiveMouseEvent(PluginInstance* instance);
diff --git a/webkit/plugins/ppapi/plugin_delegate.h b/webkit/plugins/ppapi/plugin_delegate.h
index 6f9a17e..d91621c 100644
--- a/webkit/plugins/ppapi/plugin_delegate.h
+++ b/webkit/plugins/ppapi/plugin_delegate.h
@@ -490,11 +490,11 @@ class PluginDelegate {
   // Returns the current preferences.
   virtual ::ppapi::Preferences GetPreferences() = 0;
 
-  // Locks the mouse for |instance|. It will call
-  // PluginInstance::OnLockMouseACK() to notify the instance when the operation
-  // is completed. The call to OnLockMouseACK() may be synchronous (i.e., it may
-  // be called when LockMouse() is still on the stack).
-  virtual void LockMouse(PluginInstance* instance) = 0;
+  // Locks the mouse for |instance|. If false is returned, the lock is not
+  // possible. If true is returned then the lock is pending. Success or
+  // failure will be delivered asynchronously via
+  // PluginInstance::OnLockMouseACK().
+  virtual bool LockMouse(PluginInstance* instance) = 0;
 
   // Unlocks the mouse if |instance| currently owns the mouse lock. Whenever an
   // plugin instance has lost the mouse lock, it will be notified by
@@ -504,6 +504,9 @@ class PluginDelegate {
   // call to the current mouse lock owner.
   virtual void UnlockMouse(PluginInstance* instance) = 0;
 
+  // Returns true iff |instance| currently owns the mouse lock.
+  virtual bool IsMouseLocked(PluginInstance* instance) = 0;
+
   // Notifies that |instance| has changed the cursor.
   // This will update the cursor appearance if it is currently over the plugin
   // instance.
diff --git a/webkit/plugins/ppapi/ppapi_plugin_instance.cc b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
index 7f849f6..23a1862 100644
--- a/webkit/plugins/ppapi/ppapi_plugin_instance.cc
+++ b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
@@ -1675,13 +1675,13 @@ bool PluginInstance::IsFullPagePlugin() const {
   return frame->view()->mainFrame()->document().isPluginDocument();
 }
 
-void PluginInstance::OnLockMouseACK(int32_t result) {
+void PluginInstance::OnLockMouseACK(bool succeeded) {
   if (!lock_mouse_callback_.func) {
     NOTREACHED();
     return;
   }
-
-  PP_RunAndClearCompletionCallback(&lock_mouse_callback_, result);
+  PP_RunAndClearCompletionCallback(&lock_mouse_callback_,
+                                   succeeded ? PP_OK : PP_ERROR_FAILED);
 }
 
 void PluginInstance::OnMouseLockLost() {
@@ -1689,6 +1689,13 @@ void PluginInstance::OnMouseLockLost() {
     plugin_mouse_lock_interface_->MouseLockLost(pp_instance());
 }
 
+void PluginInstance::HandleMouseLockedInputEvent(
+    const WebKit::WebMouseEvent& event) {
+  // |cursor_info| is ignored since it is hidden when the mouse is locked.
+  WebKit::WebCursorInfo cursor_info;
+  HandleInputEvent(event, &cursor_info);
+}
+
 void PluginInstance::SimulateInputEvent(const InputEventData& input_event) {
   WebView* web_view = container()->element().document().frame()->view();
   if (!web_view) {
@@ -1974,16 +1981,21 @@ int32_t PluginInstance::LockMouse(PP_Instance instance,
     // Don't support synchronous call.
     return PP_ERROR_BLOCKS_MAIN_THREAD;
   }
-  if (lock_mouse_callback_.func)
+  if (lock_mouse_callback_.func)  // A lock is pending.
     return PP_ERROR_INPROGRESS;
+
+  if (delegate()->IsMouseLocked(this))
+    return PP_OK;
+
   if (!CanAccessMainFrame())
     return PP_ERROR_NOACCESS;
 
-  lock_mouse_callback_ = callback;
-  // We will be notified on completion via OnLockMouseACK(), either
-  // synchronously or asynchronously.
-  delegate()->LockMouse(this);
-  return PP_OK_COMPLETIONPENDING;
+  if (delegate()->LockMouse(this)) {
+    lock_mouse_callback_ = callback;
+    return PP_OK_COMPLETIONPENDING;
+  } else {
+    return PP_ERROR_FAILED;
+  }
 }
 
 void PluginInstance::UnlockMouse(PP_Instance instance) {
diff --git a/webkit/plugins/ppapi/ppapi_plugin_instance.h b/webkit/plugins/ppapi/ppapi_plugin_instance.h
index 086125f..c8a6332 100644
--- a/webkit/plugins/ppapi/ppapi_plugin_instance.h
+++ b/webkit/plugins/ppapi/ppapi_plugin_instance.h
@@ -52,6 +52,7 @@ class TransportDIB;
 
 namespace WebKit {
 class WebInputEvent;
+class WebMouseEvent;
 class WebPluginContainer;
 struct WebCompositionUnderline;
 struct WebCursorInfo;
@@ -305,8 +306,12 @@ class WEBKIT_PLUGINS_EXPORT PluginInstance :
   // or embedded in a page).
   bool IsFullPagePlugin() const;
 
-  void OnLockMouseACK(int32_t result);
+  // A mouse lock request was pending and this reports success or failure.
+  void OnLockMouseACK(bool succeeded);
+  // A mouse lock was in place, but has been lost.
   void OnMouseLockLost();
+  // A mouse lock is enabled and mouse events are being delievered.
+  void HandleMouseLockedInputEvent(const WebKit::WebMouseEvent& event);
 
   // Simulates an input event to the plugin by passing it down to WebKit,
   // which sends it back up to the plugin as if it came from the user.