Integrating Mac OS Grammar checker into Chromium.

chrome/renderer/spellchecker/spellcheck_provider.cc

+// 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/renderer/spellchecker/spellcheck_provider.h"
+
+#include "chrome/common/render_messages.h"
+#include "chrome/renderer/render_thread.h"
+#include "chrome/renderer/spellchecker/spellcheck.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebTextCheckingCompletion.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebTextCheckingResult.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebVector.h"
+
+using WebKit::WebString;
+using WebKit::WebTextCheckingCompletion;
+using WebKit::WebTextCheckingResult;
+
+SpellCheckProvider::SpellCheckProvider(RenderView* render_view,
+                                       SpellCheck* spellcheck)
+    : RenderViewObserver(render_view),
+      spellcheck_(spellcheck) {
+}
+
+SpellCheckProvider::~SpellCheckProvider() {
+}
+
+void SpellCheckProvider::RequestTextChecking(
+    const WebString& text,
+    int document_tag,
+    WebTextCheckingCompletion* completion) {
+  // Text check (unified request for grammar and spell check) is only
+  // available for browser process, so we ask the system sellchecker
+  // over IPC or return an empty result if the checker is not
+  // available.
+  if (!is_using_platform_spelling_engine()) {
+    completion->didFinishCheckingText
+        (std::vector<WebTextCheckingResult>());
+    return;
+  }
+
+  Send(new ViewHostMsg_SpellChecker_PlatformRequestTextCheck(
+      routing_id(),
+      text_check_completions_.Add(completion),
+      document_tag,
+      text));
+}
+
+void SpellCheckProvider::OnSpellCheckerRespondTextCheck(
+    int identifier,
+    int tag,
+    const std::vector<WebTextCheckingResult>& results) {
+  WebKit::WebTextCheckingCompletion* completion =
+      text_check_completions_.Lookup(identifier);
+  if (!completion)
+    return;
+  text_check_completions_.Remove(identifier);
+  completion->didFinishCheckingText(results);
+}
+
+bool SpellCheckProvider::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(SpellCheckProvider, message)
+    IPC_MESSAGE_HANDLER(ViewMsg_SpellChecker_RespondTextCheck,
+                        OnSpellCheckerRespondTextCheck)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+bool SpellCheckProvider::is_using_platform_spelling_engine() const {
+  return spellcheck_ && spellcheck_->is_using_platform_spelling_engine();
+}