Implement Linux IME support

services/keyboard/linux/keyboard_service_impl.cc

Index: services/keyboard/linux/keyboard_service_impl.cc
diff --git a/services/keyboard/linux/keyboard_service_impl.cc b/services/keyboard/linux/keyboard_service_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f8b6afc2253cbde1070f18d377e0c7bc7a158870
--- /dev/null
+++ b/services/keyboard/linux/keyboard_service_impl.cc
@@ -0,0 +1,86 @@
+// Copyright 2015 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 "services/keyboard/linux/keyboard_service_impl.h"
+
+#include "base/logging.h"
+#include "base/strings/string16.h"
+#include "base/strings/utf_string_conversions.h"
+#include "mojo/public/cpp/application/application_connection.h"
+#include "mojo/public/cpp/application/connect.h"
+#include "mojo/services/input_events/interfaces/input_key_codes.mojom.h"
+
+namespace keyboard {
+
+LinuxKeyboardServiceImpl::LinuxKeyboardServiceImpl(
+    mojo::InterfaceRequest<keyboard::KeyboardService> request,
+    mojo::InterfaceRequest<NativeViewportEventDispatcher> dispatcher)
+    : event_dispatcher_binding_(this, dispatcher.Pass()),
+      binding_(this, request.Pass()) {
+}
+
+LinuxKeyboardServiceImpl::~LinuxKeyboardServiceImpl() {
+}
+
+void LinuxKeyboardServiceImpl::Show(
+    keyboard::KeyboardClientPtr client,
+    keyboard::KeyboardType type) {
+  client_ = client.Pass();
+}
+
+void LinuxKeyboardServiceImpl::ShowByRequest() {
+}
+
+void LinuxKeyboardServiceImpl::Hide() {
+  client_ = nullptr;
+}
+
+void LinuxKeyboardServiceImpl::SetText(const mojo::String& text) {
+  text_ = text;
+}
+
+void LinuxKeyboardServiceImpl::SetSelection(int32_t start, int32_t end) {
+  // Not applicable for physical keyboards
+}
+
+// |mojo::NativeViewportEventDispatcher| implementation:
+void LinuxKeyboardServiceImpl::OnEvent(
+    mojo::EventPtr event,
+    const OnEventCallback& callback) {
+  if (event->action == mojo::EventType::KEY_PRESSED &&
+      event->key_data->is_char) {
+    if (client_) {
+      switch(event->key_data->windows_key_code) {
+        case mojo::KeyboardCode::BACK: // backspace
+          client_->DeleteSurroundingText(1, 0);
+          break;
+        case mojo::KeyboardCode::DELETE:
+          client_->DeleteSurroundingText(0, 1);
+          break;
+        case mojo::KeyboardCode::HOME:
+          client_->SetSelection(0, 0);
+          break;
+        case mojo::KeyboardCode::END:
+          client_->SetSelection(text_.size()-1, text_.size()-1);
+          break;
+        case mojo::KeyboardCode::TAB:
+          // TODO: Advance focus, in reverse if shifted
+          break;
+        case mojo::KeyboardCode::RETURN:
+          client_->Submit(keyboard::SubmitAction::DONE);
+          break;
+        default:
+          base::string16 character;
+          character.push_back(event->key_data->character);
+          std::string s = base::UTF16ToUTF8(character);
+          text_ += s;
+          client_->CommitText(mojo::String(s), 1);
+          break;
+      }
+    }
+  }
+  callback.Run();
+}
+
+}  // namespace keyboard