[Mac] Implement the system dictionary popup by implementing NSTextInput methods.

chrome/browser/renderer_host/render_message_filter_mac.mm

-// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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 "chrome/browser/renderer_host/render_message_filter.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/message_loop.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/browser_thread.h"
+#import "chrome/browser/renderer_host/text_input_client_mac.h"
 #import "chrome/browser/ui/cocoa/find_pasteboard.h"
+#include "gfx/rect.h"
 
 // The number of utf16 code units that will be written to the find pasteboard,
 // longer texts are silently ignored. This is to prevent that a compromised
 // renderer can write unlimited amounts of data into the find pasteboard.
 static const size_t kMaxFindPboardStringLength = 4096;
 
 class WriteFindPboardTask : public Task {
  public:
   explicit WriteFindPboardTask(NSString* text)
       : text_([text retain]) {}
@@ skipping 11 matching lines @@
     const string16& text) {
   if (text.length() <= kMaxFindPboardStringLength) {
     NSString* nsText = base::SysUTF16ToNSString(text);
     if (nsText) {
       // FindPasteboard must be used on the UI thread.
       BrowserThread::PostTask(
           BrowserThread::UI, FROM_HERE, new WriteFindPboardTask(nsText));
     }
   }
 }
+
+void RenderMessageFilter::OnGotCharacterIndexForPoint(uint index) {
+  TextInputClientMac* service = TextInputClientMac::GetInstance();
+  service->SetCharacterIndexAndSignal(index);
+}
+
+void RenderMessageFilter::OnGotFirstRectForRange(const gfx::Rect& rect) {
+  CGRect cgrect(rect.ToCGRect());
+  TextInputClientMac* service = TextInputClientMac::GetInstance();
+  service->SetFirstRectAndSignal(NSRectFromCGRect(rect.ToCGRect()));
+}
+
+void RenderMessageFilter::OnGotStringFromRange(const string16& string) {
+  TextInputClientMac* service = TextInputClientMac::GetInstance();
+  if (!string.length()) {
+    service->SetSubstringAndSignal(nil);
+  } else {
+    NSData* data = [NSData dataWithBytes:string.data() length:string.length()];
+    NSAttributedString* string = [NSUnarchiver unarchiveObjectWithData:data];
+    service->SetSubstringAndSignal(string);
+  }
+}