Implement History as HTML and add/change a bunch of stuff to make it easier t...

chrome/browser/dom_ui/dom_ui.cc

+// Copyright (c) 2006-2008 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/dom_ui/dom_ui.h"
+
+#include "base/json_reader.h"
+#include "base/json_writer.h"
+#include "chrome/common/l10n_util.h"
+
+///////////////////////////////////////////////////////////////////////////////
+// DOMMessageHandler
+
+DOMUI::DOMUI(DOMUIContents* contents) : contents_(contents) {
+}
+
+DOMUI::~DOMUI() {
+  STLDeleteContainerPairSecondPointers(message_callbacks_.begin(),
+                                       message_callbacks_.end());
+  STLDeleteContainerPointers(handlers_.begin(), handlers_.end());
+}
+
+// DOMUI, public: -------------------------------------------------------------
+
+void DOMUI::ProcessDOMUIMessage(const std::string& message,
+                                const std::string& content) {
+  // Look up the callback for this message.
+  MessageCallbackMap::const_iterator callback = 
+      message_callbacks_.find(message);
+  if (callback == message_callbacks_.end())
+    return;
+
+  // Convert the content JSON into a Value.
+  Value* value = NULL;
+  if (!content.empty()) {
+    if (!JSONReader::Read(content, &value, false)) {
+      // The page sent us something that we didn't understand.
+      // This probably indicates a programming error.
+      NOTREACHED();
+      return;
+    }
+  }
+
+  // Forward this message and content on.
+  callback->second->Run(value);
+  delete value;
+}
+
+void DOMUI::CallJavascriptFunction(const std::wstring& function_name,
+                                   const Value& arg) {
+  std::string json;
+  JSONWriter::Write(&arg, false, &json);
+  std::wstring javascript = function_name + L"(" + UTF8ToWide(json) + L");";
+
+  ExecuteJavascript(javascript);
+}
+
+void DOMUI::CallJavascriptFunction(
+    const std::wstring& function_name,
+    const Value& arg1, const Value& arg2) {
+  std::string json;
+  JSONWriter::Write(&arg1, false, &json);
+  std::wstring javascript = function_name + L"(" + UTF8ToWide(json);
+  JSONWriter::Write(&arg2, false, &json);
+  javascript += L"," + UTF8ToWide(json) + L");";
+
+  ExecuteJavascript(javascript);
+}
+
+void DOMUI::RegisterMessageCallback(const std::string &message, 
+                                    MessageCallback *callback) {
+  message_callbacks_.insert(std::make_pair(message, callback));
+}
+
+// DOMUI, protected: ----------------------------------------------------------
+
+void DOMUI::AddMessageHandler(DOMMessageHandler* handler) {
+  handlers_.push_back(handler);
+}
+
+// DOMUI, private: ------------------------------------------------------------
+
+void DOMUI::ExecuteJavascript(const std::wstring& javascript) {
+  DCHECK(contents_);
+  contents_->render_view_host()->ExecuteJavascriptInWebFrame(std::wstring(), 
+                                                             javascript);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// DOMMessageHandler
+
+DOMMessageHandler::DOMMessageHandler(DOMUI *dom_ui) : dom_ui_(dom_ui) {
+}
+
+// DOMMessageHandler, protected: ----------------------------------------------
+
+void DOMMessageHandler::SetURLAndTitle(DictionaryValue* dictionary, 
+                                       std::wstring title,
+                                       const GURL& gurl) {
+  std::wstring wstring_url = UTF8ToWide(gurl.spec());
+  dictionary->SetString(L"url", wstring_url);
+
+  bool using_url_as_the_title = false;
+  if (title.empty()) {
+    using_url_as_the_title = true;
+    title = wstring_url;
+  }
+
+  // Since the title can contain BiDi text, we need to mark the text as either
+  // RTL or LTR, depending on the characters in the string. If we use the URL
+  // as the title, we mark the title as LTR since URLs are always treated as
+  // left to right strings.
+  std::wstring title_to_set(title);
+  if (l10n_util::GetTextDirection() == l10n_util::RIGHT_TO_LEFT) {
+    if (using_url_as_the_title) {
+      l10n_util::WrapStringWithLTRFormatting(&title_to_set);
+    } else {
+      bool success =
+          l10n_util::AdjustStringForLocaleDirection(title, &title_to_set);
+      DCHECK(success ? (title != title_to_set) : (title == title_to_set));
+    }
+  }
+  dictionary->SetString(L"title", title_to_set);
+}