Route IME-related IPCs to the active/focused RenderWidget (Mac)

content/browser/renderer_host/render_widget_host_view_mac.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
 #include <stdint.h>
@@ skipping 535 matching lines @@
   // We are owned by RenderWidgetHostViewCocoa, so if we go away before the
   // RenderWidgetHost does we need to tell it not to hold a stale pointer to
   // us.
   if (render_widget_host_) {
     // If this is a RenderWidgetHostViewGuest's platform_view_, we're not the
     // RWH's view, the RenderWidgetHostViewGuest is. So don't reset the RWH's
     // view, the RenderWidgetHostViewGuest will do it.
     if (!is_guest_view_hack_)
       render_widget_host_->SetView(NULL);
   }
+
+  // In case the view is deleted (by cocoa view) before calling destroy, we need
+  // to remove this view from the observer list of TextInputManager.
+  if (text_input_manager_ && text_input_manager_->HasObserver(this))
+    text_input_manager_->RemoveObserver(this);
 }
 
 void RenderWidgetHostViewMac::SetDelegate(
     NSObject<RenderWidgetHostViewMacDelegate>* delegate) {
   [cocoa_view_ setResponderDelegate:delegate];
 }
 
 void RenderWidgetHostViewMac::SetAllowPauseForResizeOrRepaint(bool allow) {
   allow_pause_for_resize_or_repaint_ = allow;
 }
 
 cc::SurfaceId RenderWidgetHostViewMac::SurfaceIdForTesting() const {
   return browser_compositor_->GetDelegatedFrameHost()->SurfaceIdForTesting();
 }
 
 ui::TextInputType RenderWidgetHostViewMac::GetTextInputType() {
   if (!GetTextInputManager() || !GetTextInputManager()->GetActiveWidget())
     return ui::TEXT_INPUT_TYPE_NONE;
   return GetTextInputManager()->GetTextInputState()->type;
 }
 
+RenderWidgetHostImpl* RenderWidgetHostViewMac::GetActiveWidget() {
+  return GetTextInputManager() ? GetTextInputManager()->GetActiveWidget()
+                               : nullptr;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewMac, RenderWidgetHostView implementation:
 
 bool RenderWidgetHostViewMac::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostViewMac, message)
     IPC_MESSAGE_HANDLER(ViewMsg_GetRenderedTextCompleted,
         OnGetRenderedTextCompleted)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetNeedsBeginFrames,
                         OnSetNeedsBeginFrames)
@@ skipping 2352 matching lines @@
   // text when it cancels an ongoing composition, i.e. I have never seen an
   // input method calls this method.
   hasMarkedText_ = NO;
   markedText_.clear();
   markedTextSelectedRange_ = NSMakeRange(NSNotFound, 0);
   underlines_.clear();
 
   // If we are handling a key down event, then ConfirmComposition() will be
   // called in keyEvent: method.
   if (!handlingKeyDown_) {
-    renderWidgetHostView_->render_widget_host_->ImeConfirmComposition(
-        base::string16(), gfx::Range::InvalidRange(), false);
+    if (renderWidgetHostView_->GetActiveWidget()) {
+      renderWidgetHostView_->GetActiveWidget()->ImeConfirmComposition(
+          base::string16(), gfx::Range::InvalidRange(), false);
+    }
   } else {
     unmarkTextCalled_ = YES;
   }
 }
 
 - (void)setMarkedText:(id)string selectedRange:(NSRange)newSelRange
                               replacementRange:(NSRange)replacementRange {
   // An input method updates the composition string.
   // We send the given text and range to the renderer so it can update the
   // composition node of WebKit.
@@ skipping 14 matching lines @@
   } else {
     // Use a thin black underline by default.
     underlines_.push_back(blink::WebCompositionUnderline(
         0, length, SK_ColorBLACK, false, SK_ColorTRANSPARENT));
   }
 
   // If we are handling a key down event, then SetComposition() will be
   // called in keyEvent: method.
   // Input methods of Mac use setMarkedText calls with an empty text to cancel
   // an ongoing composition. So, we should check whether or not the given text
-  // is empty to update the input method state. (Our input method backend can
+  // is empty to update the input method state. (Our input method backend
   // automatically cancels an ongoing composition when we send an empty text.
   // So, it is OK to send an empty text to the renderer.)
   if (handlingKeyDown_) {
     setMarkedTextReplacementRange_ = gfx::Range(replacementRange);
   } else {
-    renderWidgetHostView_->render_widget_host_->ImeSetComposition(
-        markedText_, underlines_, gfx::Range(replacementRange),
-        newSelRange.location, NSMaxRange(newSelRange));
+    if (renderWidgetHostView_->GetActiveWidget()) {
+      renderWidgetHostView_->GetActiveWidget()->ImeSetComposition(
+          markedText_, underlines_, gfx::Range(replacementRange),
+          newSelRange.location, NSMaxRange(newSelRange));
+    }
   }
 }
 
 - (void)doCommandBySelector:(SEL)selector {
   // An input method calls this function to dispatch an editing command to be
   // handled by this view.
   if (selector == @selector(noop:))
     return;
 
   std::string command(
@@ skipping 14 matching lines @@
   } else {
     RenderWidgetHostImpl* rwh = renderWidgetHostView_->render_widget_host_;
     rwh->Send(new InputMsg_ExecuteEditCommand(rwh->GetRoutingID(),
                                               command, ""));
   }
 }
 
 - (void)insertText:(id)string replacementRange:(NSRange)replacementRange {
   // An input method has characters to be inserted.
   // Same as Linux, Mac calls this method not only:
-  // * when an input method finishs composing text, but also;
+  // * when an input method finishes composing text, but also;
   // * when we type an ASCII character (without using input methods).
   // When we aren't using input methods, we should send the given character as
   // a Char event so it is dispatched to an onkeypress() event handler of
   // JavaScript.
   // On the other hand, when we are using input methods, we should send the
   // given characters as an input method event and prevent the characters from
   // being dispatched to onkeypress() event handlers.
   // Text inserting might be initiated by other source instead of keyboard
   // events, such as the Characters dialog. In this case the text should be
   // sent as an input method event as well.
   // TODO(suzhe): It's hard for us to support replacementRange without accessing
   // the full web content.
   BOOL isAttributedString = [string isKindOfClass:[NSAttributedString class]];
   NSString* im_text = isAttributedString ? [string string] : string;
   if (handlingKeyDown_) {
     textToBeInserted_.append(base::SysNSStringToUTF16(im_text));
   } else {
     gfx::Range replacement_range(replacementRange);
-    renderWidgetHostView_->render_widget_host_->ImeConfirmComposition(
-        base::SysNSStringToUTF16(im_text), replacement_range, false);
+    if (renderWidgetHostView_->GetActiveWidget()) {
+      renderWidgetHostView_->GetActiveWidget()->ImeConfirmComposition(
+          base::SysNSStringToUTF16(im_text), replacement_range, false);
+    }
   }
 
   // Inserting text will delete all marked text automatically.
   hasMarkedText_ = NO;
 }
 
 - (void)insertText:(id)string {
   [self insertText:string replacementRange:NSMakeRange(NSNotFound, 0)];
 }
 
@@ skipping 110 matching lines @@
 
   hasMarkedText_ = NO;
   // Should not call [self unmarkText] here, because it'll send unnecessary
   // cancel composition IPC message to the renderer.
 }
 
 - (void)confirmComposition {
   if (!hasMarkedText_)
     return;
 
-  if (renderWidgetHostView_->render_widget_host_)
-    renderWidgetHostView_->render_widget_host_->ImeConfirmComposition(
+  if (renderWidgetHostView_->GetActiveWidget()) {
+    renderWidgetHostView_->GetActiveWidget()->ImeConfirmComposition(
         base::string16(), gfx::Range::InvalidRange(), false);
+  }
 
   [self cancelComposition];
 }
 
 // Overriding a NSResponder method to support application services.
 
 - (id)validRequestorForSendType:(NSString*)sendType
                      returnType:(NSString*)returnType {
   id requestor = nil;
   BOOL sendTypeIsString = [sendType isEqual:NSStringPboardType];
@@ skipping 63 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end