Pepper IME API for surrounding text retrieval.

ppapi/cpp/dev/text_input_dev.cc

Index: ppapi/cpp/dev/text_input_dev.cc
diff --git a/ppapi/cpp/dev/text_input_dev.cc b/ppapi/cpp/dev/text_input_dev.cc
index 6783892ca74e315240abbd7c300fde6a6e68a34f..83237911a625b1cf26bf8a7083d9d1a821033527 100644
--- a/ppapi/cpp/dev/text_input_dev.cc
+++ b/ppapi/cpp/dev/text_input_dev.cc
@@ -4,6 +4,8 @@
 
 #include "ppapi/cpp/dev/text_input_dev.h"
 
+#include "ppapi/c/dev/ppp_text_input_dev.h"
+#include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/instance_handle.h"
 #include "ppapi/cpp/module_impl.h"
 #include "ppapi/cpp/rect.h"
@@ -12,6 +14,22 @@ namespace pp {
 
 namespace {
 
+static const char kPPPTextInputInterface[] = PPP_TEXTINPUT_DEV_INTERFACE;
+
+void RequestSurroundingText(PP_Instance instance,
+                            uint32_t desired_number_of_chanracetes) {
+  void* object = Instance::GetPerInstanceObject(instance,
+                                                kPPPTextInputInterface);
+  if (!object)
+    return;
+  static_cast<TextInput_Dev*>(object)->RequestSurroundingText(
+      desired_number_of_chanracetes);
+}
+
+const PPP_TextInput_Dev ppp_text_input = {
+  &RequestSurroundingText
+};
+
 template <> const char* interface_name<PPB_TextInput_Dev>() {
   return PPB_TEXTINPUT_DEV_INTERFACE;
 }
@@ -19,11 +37,20 @@ template <> const char* interface_name<PPB_TextInput_Dev>() {
 }  // namespace
 
 
-TextInput_Dev::TextInput_Dev(const InstanceHandle& instance)
+TextInput_Dev::TextInput_Dev(Instance* instance)
     : instance_(instance) {
+  Module::Get()->AddPluginInterface(kPPPTextInputInterface,
+                                    &ppp_text_input);
+  instance->AddPerInstanceObject(kPPPTextInputInterface, this);
 }
 
 TextInput_Dev::~TextInput_Dev() {
+  Instance::RemovePerInstanceObject(instance_, kPPPTextInputInterface, this);
+}
+
+void TextInput_Dev::RequestSurroundingText(uint32_t) {
+  // Default implementation. Send a null range.
+  UpdateSurroundingText("", 0, 0);
 }
 
 void TextInput_Dev::SetTextInputType(PP_TextInput_Type type) {
@@ -48,4 +75,21 @@ void TextInput_Dev::CancelCompositionText() {
       instance_.pp_instance());
 }
 
+void TextInput_Dev::SelectionChanged() {
+  if (!has_interface<PPB_TextInput_Dev>())
+    return;
+  get_interface<PPB_TextInput_Dev>()->SelectionChanged(
+      instance_.pp_instance());
+}
+
+void TextInput_Dev::UpdateSurroundingText(const std::string& text,
+                                          uint32_t caret,
+                                          uint32_t anchor) {
+  if (!has_interface<PPB_TextInput_Dev>())
+    return;
+  get_interface<PPB_TextInput_Dev>()->UpdateSurroundingText(
+      instance_.pp_instance(), text.c_str(), caret, anchor);
+}
+
+
 }  // namespace pp