Pepper IME API for surrounding text retrieval.

ppapi/proxy/ppp_text_input_proxy.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 "ppapi/proxy/ppp_text_input_proxy.h"
+
+#include "ppapi/c/dev/ppp_text_input_dev.h"
+#include "ppapi/proxy/host_dispatcher.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/shared_impl/proxy_lock.h"
+
+namespace ppapi {
+namespace proxy {
+
+namespace {
+
+void RequestSurroundingText(PP_Instance instance,
+                            uint32_t desired_number_of_characters) {
+  proxy::HostDispatcher* dispatcher =
+      proxy::HostDispatcher::GetForInstance(instance);
+  if (!dispatcher) {
+    // The dispatcher should always be valid.
+    NOTREACHED();
+    return;
+  }
+
+  dispatcher->Send(new PpapiMsg_PPPTextInput_RequestSurroundingText(
+      API_ID_PPP_TEXT_INPUT, instance, desired_number_of_characters));
+}
+
+const PPP_TextInput_Dev g_ppp_text_input_thunk = {
+  &RequestSurroundingText
+};
+
+}  // namespace
+
+// static
+const PPP_TextInput_Dev* PPP_TextInput_Proxy::GetProxyInterface() {
+  return &g_ppp_text_input_thunk;
+}
+
+PPP_TextInput_Proxy::PPP_TextInput_Proxy(Dispatcher* dispatcher)
+    : InterfaceProxy(dispatcher),
+      ppp_text_input_impl_(NULL) {
+  if (dispatcher->IsPlugin()) {
+    ppp_text_input_impl_ = static_cast<const PPP_TextInput_Dev*>(
+        dispatcher->local_get_interface()(PPP_TEXTINPUT_DEV_INTERFACE));
+  }
+}
+
+PPP_TextInput_Proxy::~PPP_TextInput_Proxy() {
+}
+
+bool PPP_TextInput_Proxy::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(PPP_TextInput_Proxy, msg)
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPTextInput_RequestSurroundingText,
+                        OnMsgRequestSurroundingText)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void PPP_TextInput_Proxy::OnMsgRequestSurroundingText(
+    PP_Instance instance, uint32_t desired_number_of_characters) {
+  if (ppp_text_input_impl_) {
+    CallWhileUnlocked(ppp_text_input_impl_->RequestSurroundingText,
+                      instance, desired_number_of_characters);
+  }
+}
+
+}  // namespace proxy
+}  // namespace ppapi