WebUIHandler for chrome://keyboard

chrome/browser/extensions/api/input/input.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/extensions/api/input/input.h"
 
 #include <string>
 
 #include "base/lazy_instance.h"
-#include "base/string_util.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/values.h"
+#include "base/memory/scoped_ptr.h"
 #include "chrome/browser/extensions/extension_function_registry.h"
-#include "chrome/browser/ui/top_level_widget.h"
-#include "chrome/common/chrome_notification_types.h"
 #include "content/public/browser/browser_thread.h"
 #include "ui/base/events/event.h"
-#include "ui/base/events/key_identifier_conversion.h"
 
-#if defined(USE_ASH) && defined(USE_AURA)
+#if defined(USE_ASH)
 #include "ash/shell.h"
 #include "ui/aura/root_window.h"
+#include "ui/keyboard/keyboard_util.h"
 #endif
 
+namespace {
+
+const char kNotYetImplementedError[] =
+    "API is not implemented on this platform.";
+
+}  // namespace
+
 namespace extensions {
 
-namespace {
+bool SendKeyboardEventInputFunction::RunImpl() {
+#if defined(USE_ASH)
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 
-// Keys.
-const char kType[] = "type";
-const char kKeyIdentifier[] = "keyIdentifier";
-const char kAlt[] = "altKey";
-const char kCtrl[] = "ctrlKey";
-const char kMeta[] = "metaKey";
-const char kShift[] = "shiftKey";
-const char kKeyDown[] = "keydown";
-const char kKeyUp[] = "keyup";
+  scoped_ptr<ui::KeyEvent> event(
+      keyboard::KeyEventFromArgs(args_.get(), &error_));
+  if (!event)
+    return false;
 
-// Errors.
-const char kUnknownEventTypeError[] = "Unknown event type.";
-const char kUnknownOrUnsupportedKeyIdentiferError[] = "Unknown or unsupported "
-    "key identifier.";
-const char kUnsupportedModifier[] = "Unsupported modifier.";
-const char kNoValidRecipientError[] = "No valid recipient for event.";
-const char kKeyEventUnprocessedError[] = "Event was not handled.";
+  ash::Shell::GetActiveRootWindow()->AsRootWindowHostDelegate()->OnHostKeyEvent(
+      event.get());
 
-ui::EventType GetTypeFromString(const std::string& type) {
-  if (type == kKeyDown) {
-    return ui::ET_KEY_PRESSED;
-  } else if (type == kKeyUp) {
-    return ui::ET_KEY_RELEASED;
-  }
-  return ui::ET_UNKNOWN;
-}
-
-// Converts a hex string "U+NNNN" to uint16. Returns 0 on error.
-uint16 UnicodeIdentifierStringToInt(const std::string& key_identifier) {
-  int character = 0;
-  if ((key_identifier.length() == 6) &&
-      (key_identifier.substr(0, 2) == "U+") &&
-      (key_identifier.substr(2).find_first_not_of("0123456789abcdefABCDEF") ==
-       std::string::npos)) {
-    const bool result =
-        base::HexStringToInt(key_identifier.substr(2), &character);
-    DCHECK(result) << key_identifier;
-  }
-  return character;
-}
-
-}  // namespace
-
-bool SendKeyboardEventInputFunction::RunImpl() {
-  DictionaryValue* args;
-  EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(0, &args));
-
-  std::string type_name;
-  EXTENSION_FUNCTION_VALIDATE(args->GetString(kType, &type_name));
-  ui::EventType type = GetTypeFromString(type_name);
-  if (type == ui::ET_UNKNOWN) {
-    error_ = kUnknownEventTypeError;
-    return false;
-  }
-
-  std::string identifier;
-  EXTENSION_FUNCTION_VALIDATE(args->GetString(kKeyIdentifier, &identifier));
-  TrimWhitespaceASCII(identifier, TRIM_ALL, &identifier);
-
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
-  const ui::KeyEvent& prototype_event =
-      ui::KeyEventFromKeyIdentifier(identifier);
-  uint16 character = 0;
-  if (prototype_event.key_code() == ui::VKEY_UNKNOWN) {
-    // Check if |identifier| is "U+NNNN" format.
-    character = UnicodeIdentifierStringToInt(identifier);
-    if (!character) {
-      error_ = kUnknownOrUnsupportedKeyIdentiferError;
-      return false;
-    }
-  }
-
-  bool flag = false;
-  int flags = 0;
-  if (prototype_event.key_code() != ui::VKEY_UNKNOWN)
-    flags = prototype_event.flags();
-  flags |= (args->GetBoolean(kAlt, &flag) && flag) ? ui::EF_ALT_DOWN : 0;
-  flags |= (args->GetBoolean(kCtrl, &flag) && flag) ? ui::EF_CONTROL_DOWN : 0;
-  flags |= (args->GetBoolean(kShift, &flag) && flag) ? ui::EF_SHIFT_DOWN : 0;
-  if (args->GetBoolean(kMeta, &flag) && flag) {
-    // Views does not have a Meta event flag, so return an error for now.
-    error_ = kUnsupportedModifier;
-    return false;
-  }
-
-  ui::KeyEvent event(type,
-                     prototype_event.key_code(),
-                     flags,
-                     prototype_event.is_char());
-  if (character) {
-    event.set_character(character);
-    event.set_unmodified_character(character);
-  }
-
-#if defined(USE_ASH) && defined(USE_AURA)
-  ash::Shell::GetActiveRootWindow()->AsRootWindowHostDelegate()->OnHostKeyEvent(
-      &event);
   return true;
-#else
+#endif
+  error_ = kNotYetImplementedError;
   return false;
-#endif
 }
 
 InputAPI::InputAPI(Profile* profile) {
   ExtensionFunctionRegistry* registry =
       ExtensionFunctionRegistry::GetInstance();
   registry->RegisterFunction<SendKeyboardEventInputFunction>();
 }
 
 InputAPI::~InputAPI() {
 }
 
 static base::LazyInstance<ProfileKeyedAPIFactory<InputAPI> >
 g_factory = LAZY_INSTANCE_INITIALIZER;
 
 // static
 ProfileKeyedAPIFactory<InputAPI>* InputAPI::GetFactoryInstance() {
   return &g_factory.Get();
 }
 
 }  // namespace extensions