Send IME events to windowless plug-ins (Chromium side)

This change adds a new class WebPluginIMEWin that converts the platform-independent IME data sent from a renderer process (or WebKit) to the Win32 IME messages and send them to a plug-in. To allow the plug-in to retrieve the IME data with IMM32 function calls, this change also adds a patch to GetProcessAddress(). (Flash seems to retrieve the pointers to IMM32 function with this function.) This change also sends IME status retrieved from the plug-in to a browser process (via a renderer process).

BUG=82507
TEST=manual
Review URL: http://codereview.chromium.org/7082034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@103869 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 53 insertions, 0 deletions

diff --git a/content/plugin/webplugin_delegate_stub.cc b/content/plugin/webplugin_delegate_stub.cc
index dce1058..2d1037c 100644
--- a/content/plugin/webplugin_delegate_stub.cc
+++ b/content/plugin/webplugin_delegate_stub.cc
@@ -110,6 +110,12 @@ bool WebPluginDelegateStub::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(PluginMsg_SendJavaScriptStream,
                         OnSendJavaScriptStream)
     IPC_MESSAGE_HANDLER(PluginMsg_SetContentAreaFocus, OnSetContentAreaFocus)
+#if defined(OS_WIN)
+    IPC_MESSAGE_HANDLER(PluginMsg_ImeCompositionUpdated,
+                        OnImeCompositionUpdated)
+    IPC_MESSAGE_HANDLER(PluginMsg_ImeCompositionCompleted,
+                        OnImeCompositionCompleted)
+#endif
 #if defined(OS_MACOSX)
     IPC_MESSAGE_HANDLER(PluginMsg_SetWindowFocus, OnSetWindowFocus)
     IPC_MESSAGE_HANDLER(PluginMsg_ContainerHidden, OnContainerHidden)
@@ -324,6 +330,25 @@ void WebPluginDelegateStub::OnSetContentAreaFocus(bool has_focus) {
     delegate_->SetContentAreaHasFocus(has_focus);
 }
 
+#if defined(OS_WIN)
+void WebPluginDelegateStub::OnImeCompositionUpdated(
+    const string16& text,
+    const std::vector<int>& clauses,
+    const std::vector<int>& target,
+    int cursor_position) {
+  if (delegate_)
+    delegate_->ImeCompositionUpdated(text, clauses, target, cursor_position);
+#if defined(OS_WIN)
+  webplugin_->UpdateIMEStatus();
+#endif
+}
+
+void WebPluginDelegateStub::OnImeCompositionCompleted(const string16& text) {
+  if (delegate_)
+    delegate_->ImeCompositionCompleted(text);
+}
+#endif
+
 #if defined(OS_MACOSX)
 void WebPluginDelegateStub::OnSetWindowFocus(bool has_focus) {
   if (delegate_)
diff --git a/content/plugin/webplugin_delegate_stub.h b/content/plugin/webplugin_delegate_stub.h
index 4a12b9a..a3be8a0 100644
--- a/content/plugin/webplugin_delegate_stub.h
+++ b/content/plugin/webplugin_delegate_stub.h
@@ -81,6 +81,13 @@ class WebPluginDelegateStub : public IPC::Channel::Listener,
   void OnGetFormValue(string16* value, bool* success);
 
   void OnSetContentAreaFocus(bool has_focus);
+#if defined(OS_WIN)
+  void OnImeCompositionUpdated(const string16& text,
+                               const std::vector<int>& clauses,
+                               const std::vector<int>& target,
+                               int cursor_position);
+  void OnImeCompositionCompleted(const string16& text);
+#endif
 #if defined(OS_MACOSX)
   void OnSetWindowFocus(bool has_focus);
   void OnContainerHidden();
diff --git a/content/plugin/webplugin_proxy.cc b/content/plugin/webplugin_proxy.cc
index 2f7ef5f..4b167e1 100644
--- a/content/plugin/webplugin_proxy.cc
+++ b/content/plugin/webplugin_proxy.cc
@@ -747,3 +747,16 @@ void WebPluginProxy::ResourceClientDeleted(
 void WebPluginProxy::URLRedirectResponse(bool allow, int resource_id) {
   Send(new PluginHostMsg_URLRedirectResponse(route_id_, allow, resource_id));
 }
+
+#if defined(OS_WIN)
+void WebPluginProxy::UpdateIMEStatus() {
+  // Retrieve the IME status from a plug-in and send it to a renderer process
+  // when the plug-in has updated it.
+  int input_type;
+  gfx::Rect caret_rect;
+  if (!delegate_->GetIMEStatus(&input_type, &caret_rect))
+    return;
+
+  Send(new PluginHostMsg_NotifyIMEStatus(route_id_, input_type, caret_rect));
+}
+#endif
diff --git a/content/plugin/webplugin_proxy.h b/content/plugin/webplugin_proxy.h
index b6e3175..54f8894 100644
--- a/content/plugin/webplugin_proxy.h
+++ b/content/plugin/webplugin_proxy.h
@@ -168,6 +168,14 @@ class WebPluginProxy : public webkit::npapi::WebPlugin {
 
   virtual void URLRedirectResponse(bool allow, int resource_id);
 
+#if defined(OS_WIN)
+  // Retrieves the IME status from a windowless plug-in and sends it to a
+  // renderer process. A renderer process will convert the coordinates from
+  // local to the window coordinates and send the converted coordinates to a
+  // browser process.
+  void UpdateIMEStatus();
+#endif
+
  private:
   bool Send(IPC::Message* msg);