Implement chrome.input.ime.setComposition/commitText API.

chrome/browser/ui/input_method/input_method_engine.cc

Index: chrome/browser/ui/input_method/input_method_engine.cc
diff --git a/chrome/browser/ui/input_method/input_method_engine.cc b/chrome/browser/ui/input_method/input_method_engine.cc
index a03580c9e03f21aaf2031c240011098ed4d96ef6..f1c5e8e017c137b53925cf0bd43bd0523cba56a6 100644
--- a/chrome/browser/ui/input_method/input_method_engine.cc
+++ b/chrome/browser/ui/input_method/input_method_engine.cc
@@ -4,6 +4,10 @@
 
 #include "chrome/browser/ui/input_method/input_method_engine.h"
 
+#include "ui/base/ime/composition_text.h"
+#include "ui/base/ime/ime_bridge.h"
+#include "ui/base/ime/ime_input_context_handler_interface.h"
+
 namespace input_method {
 
 InputMethodEngine::InputMethodEngine() {}
@@ -25,4 +29,44 @@ std::string InputMethodEngine::GetExtensionId() const {
   return extension_id_;
 }
 
+void InputMethodEngine::UpdateComposition(
+    const ui::CompositionText& composition_text,
+    uint32_t cursor_pos,
+    bool is_visible) {
+  composition_.CopyFrom(composition_text);
+
+  // Use a black thin underline by default.
+  if (composition_.underlines.empty()) {
+    composition_.underlines.push_back(
+        ui::CompositionUnderline(0, composition_.text.length(), SK_ColorBLACK,
+                                 false /* thick */, SK_ColorTRANSPARENT));
+  }
+
+  ui::IMEInputContextHandlerInterface* input_context =
+      ui::IMEBridge::Get()->GetInputContextHandler();
+  // If the IME extension is handling key event, hold the composition text
+  // until the key event is handled.
+  if (input_context && !handling_key_event_) {
+    input_context->UpdateCompositionText(composition_text, cursor_pos,
+                                         is_visible);
+    composition_.Clear();
+  }
+}
+
+void InputMethodEngine::CommitTextToInputContext(int context_id,
+                                                 const std::string& text) {
+  // Append the text to the buffer, as it allows committing text multiple times
+  // when processing a key event.
+  text_ += text;
+
+  ui::IMEInputContextHandlerInterface* input_context =
+      ui::IMEBridge::Get()->GetInputContextHandler();
+  // If the IME extension is handling key event, hold the text until the key
+  // event is handled.
+  if (input_context && !handling_key_event_) {
+    input_context->CommitText(text_);
+    text_ = "";
+  }
+}
+
 }  // namespace input_method