Introduce WebInputMethodController to blink

third_party/WebKit/Source/web/WebInputMethodControllerImpl.h

+// Copyright 2016 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.
+
+#ifndef WebInputMethodControllerImpl_h
+#define WebInputMethodControllerImpl_h
+
+#include "platform/heap/Handle.h"
+#include "public/web/WebCompositionUnderline.h"
+#include "public/web/WebInputMethodController.h"
+
+namespace blink {
+
+class InputMethodController;
+class LocalFrame;
+class WebLocalFrameImpl;
+class WebPlugin;
+class WebString;
+
+class WebInputMethodControllerImpl : public WebInputMethodController {
+  WTF_MAKE_NONCOPYABLE(WebInputMethodControllerImpl);
+
+ public:
+  explicit WebInputMethodControllerImpl(WebLocalFrameImpl* ownerFrame);
+  ~WebInputMethodControllerImpl() override;
+
+  static WebInputMethodControllerImpl* fromFrame(LocalFrame*);
+
+  // WebInputMethodController overrides.
+  bool setComposition(const WebString& text,
+                      const WebVector<WebCompositionUnderline>& underlines,
+                      int selectionStart,
+                      int selectionEnd) override;
+
+  // Used to ask the WebInputMethodController to either delete and ongoing
+  // composition, or insert the specified text, or move the caret according to
+  // relativeCaretPosition.
+  bool commitText(const WebString& text, int relativeCaretPosition) override;
+
+  // Called to ask the WebInputMethodController to confirm an ongoing
+  // composition.
+  bool finishComposingText(
+      ConfirmCompositionBehavior selectionBehavior) override;
+
+  void setSuppressNextKeypressEvent(bool suppress) {
+    m_suppressNextKeypressEvent = suppress;
+  }
+
+  DECLARE_TRACE();
+
+ private:
+  LocalFrame* frame() const;
+  InputMethodController& inputMethodController() const;
+  WebPlugin* focusedPluginIfInputMethodSupported() const;
+
+  WeakMember<WebLocalFrameImpl> m_webLocalFrame;
+  bool m_suppressNextKeypressEvent;
+};
+}  // namespace blink
+
+#endif