Initial check-in of gesture config WebUI.

chrome/browser/ui/webui/gesture_config_ui.cc

+// 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 "chrome/browser/ui/webui/gesture_config_ui.h"
+
+#include "base/values.h"
+#include "base/bind.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+#include "chrome/browser/ui/webui/chrome_web_ui_data_source.h"
+#include "chrome/common/url_constants.h"
+#include "content/public/browser/web_ui.h"
+#include "grit/browser_resources.h"
+#include "grit/generated_resources.h"
+
+/**
+ * WebUI for configuring gesture.* preference values used by
+ * Chrome's gesture recognition system.
+ */
+GestureConfigUI::GestureConfigUI(content::WebUI* web_ui)
+    : content::WebUIController(web_ui) {
+  // Set up the chrome://gesture-config source.
+  ChromeWebUIDataSource* html_source =
+      new ChromeWebUIDataSource(chrome::kChromeUIGestureConfigHost);
+
+  // Register callback handlers.
+  web_ui->RegisterMessageCallback(
+      "getPreferenceValue",
+      base::Bind(&GestureConfigUI::GetPreferenceValue,
+                 base::Unretained(this)));
+  web_ui->RegisterMessageCallback(
+      "setPreferenceValue",
+      base::Bind(&GestureConfigUI::SetPreferenceValue,
+                 base::Unretained(this)));
+
+  // Add required resources.
+  html_source->add_resource_path("gesture_config.css", IDR_GESTURE_CONFIG_CSS);
+  html_source->add_resource_path("gesture_config.js", IDR_GESTURE_CONFIG_JS);
+  html_source->set_default_resource(IDR_GESTURE_CONFIG_HTML);
+
+  Profile* profile = Profile::FromWebUI(web_ui);
+  ChromeURLDataManager::AddDataSource(profile, html_source);
+}
+
+/**
+ * Request a preference setting's value.
+ * This method is asynchronous; the result is provided by a call to
+ * the JS method 'gesture_config.getPreferenceValueResult'.
+ */
+void GestureConfigUI::GetPreferenceValue(const base::ListValue* args) {
+  std::string pref_name;
+
+  if (!args->GetString(0, &pref_name)) return;
+
+  Profile* profile = Profile::FromWebUI(web_ui());
+  PrefService* prefs = profile->GetPrefs();
+
+  base::StringValue arg1(pref_name);
+  base::FundamentalValue arg2(prefs->GetDouble(pref_name.c_str()));
+
+  web_ui()->CallJavascriptFunction(
+      "gesture_config.getPreferenceValueResult",
+      arg1,
+      arg2);
+}
+
+/**
+ * Set a preference setting's value.
+ * Two parameters are provided in a JS list: prefName and value, the
+ * key of the preference value to be set, and the value it's to be set to.
+ */
+void GestureConfigUI::SetPreferenceValue(const base::ListValue* args) {
+  std::string pref_name;
+  double value;
+
+  if (!args->GetString(0, &pref_name) || !args->GetDouble(1, &value)) return;
+
+  Profile* profile = Profile::FromWebUI(web_ui());
+  PrefService* prefs = profile->GetPrefs();
+
+  prefs->SetDouble(pref_name.c_str(), value);
+}
+
+GestureConfigUI::~GestureConfigUI() {
+}