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