A11y: Introduce High Contrast Mode and Screen Magnifier to ubar tray.

chrome/browser/chromeos/accessibility/accessibility_util.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/chromeos/accessibility/accessibility_util.h"
 
 #include <queue>
 
 #include "ash/high_contrast/high_contrast_controller.h"
 #include "ash/magnifier/magnification_controller.h"
 #include "ash/magnifier/partial_magnification_controller.h"
 #include "ash/shell.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
 #include "chrome/browser/accessibility/accessibility_extension_api.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/component_loader.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/file_reader.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/speech/extension_api/tts_extension_api_controller.h"
+#include "chrome/browser/ui/singleton_tabs.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_messages.h"
 #include "chrome/common/extensions/extension_resource.h"
 #include "chrome/common/extensions/user_script.h"
 #include "chrome/common/pref_names.h"
+#include "chrome/common/url_constants.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui.h"
+#include "googleurl/src/gurl.h"
 #include "grit/browser_resources.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 
 using content::RenderViewHost;
 
 namespace {
 const char kScreenMagnifierOff[] = "";
 const char kScreenMagnifierFull[] = "full";
@@ skipping 142 matching lines @@
 void EnableHighContrast(bool enabled) {
   PrefService* pref_service = g_browser_process->local_state();
   pref_service->SetBoolean(prefs::kHighContrastEnabled, enabled);
   pref_service->CommitPendingWrite();
 
 #if defined(USE_ASH)
   ash::Shell::GetInstance()->high_contrast_controller()->SetEnabled(enabled);
 #endif
 }
 
-void SetScreenMagnifier(ScreenMagnifierType type) {
+void SetScreenMagnifier(ash::MagnifierType type) {
   PrefService* pref_service = g_browser_process->local_state();
-  pref_service->SetString(prefs::kScreenMagnifierType,
+  pref_service->SetString(prefs::kMagnifierType,
                           ScreenMagnifierNameFromType(type));
   pref_service->CommitPendingWrite();
 
 #if defined(USE_ASH)
   ash::Shell::GetInstance()->magnification_controller()->SetEnabled(
-      type == MAGNIFIER_FULL);
+      type == ash::MAGNIFIER_FULL);
   ash::Shell::GetInstance()->partial_magnification_controller()->SetEnabled(
-      type == MAGNIFIER_PARTIAL);
+      type == ash::MAGNIFIER_PARTIAL);
 #endif
 }
 
 void EnableVirtualKeyboard(bool enabled) {
   PrefService* pref_service = g_browser_process->local_state();
   pref_service->SetBoolean(prefs::kVirtualKeyboardEnabled, enabled);
   pref_service->CommitPendingWrite();
 }
 
 void ToggleSpokenFeedback(content::WebUI* login_web_ui) {
@@ skipping 32 matching lines @@
 bool IsHighContrastEnabled() {
   if (!g_browser_process) {
     return false;
   }
   PrefService* prefs = g_browser_process->local_state();
   bool high_contrast_enabled = prefs &&
       prefs->GetBoolean(prefs::kHighContrastEnabled);
   return high_contrast_enabled;
 }
 
-ScreenMagnifierType GetScreenMagnifierType() {
+ash::MagnifierType GetMagnifierType() {
   if (!g_browser_process)
-    return MAGNIFIER_OFF;
+    return ash::MAGNIFIER_OFF;
 
   PrefService* prefs = g_browser_process->local_state();
   std::string screen_magnifier_type;
   if (!prefs)
-    return MAGNIFIER_OFF;
+    return ash::MAGNIFIER_OFF;
 
-  return ScreenMagnifierTypeFromName(
-      prefs->GetString(prefs::kScreenMagnifierType).c_str());
+  return MagnifierTypeFromName(
+      prefs->GetString(prefs::kMagnifierType).c_str());
 }
 
-ScreenMagnifierType ScreenMagnifierTypeFromName(const char type_name[]) {
+ash::MagnifierType MagnifierTypeFromName(const char type_name[]) {
   if (0 == strcmp(type_name, kScreenMagnifierFull))
-    return MAGNIFIER_FULL;
+    return ash::MAGNIFIER_FULL;
   else if (0 == strcmp(type_name, kScreenMagnifierPartial))
-    return MAGNIFIER_PARTIAL;
+    return ash::MAGNIFIER_PARTIAL;
   else
-    return MAGNIFIER_OFF;
+    return ash::MAGNIFIER_OFF;
 }
 
-const char* ScreenMagnifierNameFromType(ScreenMagnifierType type) {
+const char* ScreenMagnifierNameFromType(ash::MagnifierType type) {
   switch (type) {
-    case MAGNIFIER_OFF:
+    case ash::MAGNIFIER_OFF:
       return kScreenMagnifierOff;
-    case MAGNIFIER_FULL:
+    case ash::MAGNIFIER_FULL:
       return kScreenMagnifierFull;
-    case MAGNIFIER_PARTIAL:
+    case ash::MAGNIFIER_PARTIAL:
       return kScreenMagnifierPartial;
   }
   return kScreenMagnifierOff;
 }
 
 void MaybeSpeak(const std::string& utterance) {
   if (IsSpokenFeedbackEnabled())
     Speak(utterance);
 }
 
+void ShowAccessibilityHelp(Browser* browser) {
+  chrome::ShowSingletonTab(browser, GURL(chrome::kChromeAccessibilityHelpURL));
+}
+
 }  // namespace accessibility
 }  // namespace chromeos