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// 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 CHROME_BROWSER_UI_INPUT_METHOD_INPUT_METHOD_ENGINE_H_
#define CHROME_BROWSER_UI_INPUT_METHOD_INPUT_METHOD_ENGINE_H_
#include <string>
#include <vector>
#include "chrome/browser/ui/ime/ime_window.h"
#include "chrome/browser/ui/ime/ime_window_observer.h"
#include "chrome/browser/ui/input_method/input_method_engine_base.h"
namespace content {
class RenderFrameHost;
} // namespace content
namespace input_method {
class InputMethodEngine : public InputMethodEngineBase,
public ui::ImeWindowObserver {
public:
InputMethodEngine();
~InputMethodEngine() override;
// ui::IMEEngineHandlerInterface:
bool IsActive() const override;
std::string GetExtensionId() const override;
// Creates and shows the IME window.
// Returns 0 for errors and |error| will contains the error message.
int CreateImeWindow(const extensions::Extension* extension,
content::RenderFrameHost* render_frame_host,
const std::string& url,
ui::ImeWindow::Mode mode,
const gfx::Rect& bounds,
std::string* error);
void ShowImeWindow(int window_id);
void HideImeWindow(int window_id);
void CloseImeWindows();
// input_method::InputMethodEngineBase:
void FocusOut() override;
void SetCompositionBounds(const std::vector<gfx::Rect>& bounds) override;
void UpdateComposition(const ui::CompositionText& composition_text,
uint32_t cursor_pos,
bool is_visible) override;
void CommitTextToInputContext(int context_id,
const std::string& text) override;
bool SendKeyEvent(ui::KeyEvent* ui_event, const std::string& code) override;
private:
// ui::ImeWindowObserver:
void OnWindowDestroyed(ui::ImeWindow* ime_window) override;
ui::ImeWindow* FindWindowById(int window_id) const;
// Checks if the page is special page that we want to disable some key events.
bool IsSpecialPage(ui::InputMethod* method);
// Checks if the key event are whitelisted key for all pages.
bool IsValidKeyForAllPages(ui::KeyEvent* ui_event);
// Holds the IME window instances for properly closing in the destructor.
// The follow-cursor window is singleton.
// The normal windows cannot exceed the max count.
ui::ImeWindow* follow_cursor_window_; // Weak.
std::vector<ui::ImeWindow*> normal_windows_; // Weak.
// Tracks the current cursor bounds so that the new follow cursor window can
// be aligned with cursor once it being created.
gfx::Rect current_cursor_bounds_;
DISALLOW_COPY_AND_ASSIGN(InputMethodEngine);
};
} // namespace input_method
#endif // CHROME_BROWSER_UI_INPUT_METHOD_INPUT_METHOD_ENGINE_H_
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