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// Copyright 2013 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 UI_BASE_IME_LINUX_LINUX_INPUT_METHOD_CONTEXT_H_
#define UI_BASE_IME_LINUX_LINUX_INPUT_METHOD_CONTEXT_H_
#include "base/i18n/rtl.h"
#include "base/strings/string16.h"
#include "ui/base/ime/text_input_type.h"
#include "ui/base/ui_export.h"
namespace gfx {
class Rect;
}
namespace ui {
struct CompositionText;
class KeyEvent;
// An interface of input method context for input method frameworks on
// GNU/Linux and likes.
class UI_EXPORT LinuxInputMethodContext {
public:
virtual ~LinuxInputMethodContext() {}
// Dispatches the key event to an underlying IME. Returns true if the key
// event is handled, otherwise false. A client must set the text input type
// before dispatching a key event.
virtual bool DispatchKeyEvent(const ui::KeyEvent& key_event) = 0;
// Resets the context. A client needs to call OnTextInputTypeChanged() again
// before calling DispatchKeyEvent().
virtual void Reset() = 0;
// Returns the text direction of the current keyboard layout or input method.
virtual base::i18n::TextDirection GetInputTextDirection() const = 0;
// Notifies the context that the text input type has changed.
virtual void OnTextInputTypeChanged(TextInputType text_input_type) = 0;
// Notifies the context that the caret bounds have changed. |caret_bounds| is
// relative to screen coordinates.
virtual void OnCaretBoundsChanged(const gfx::Rect& caret_bounds) = 0;
};
// An interface of callback functions called from LinuxInputMethodContext.
class UI_EXPORT LinuxInputMethodContextDelegate {
public:
virtual ~LinuxInputMethodContextDelegate() {}
// Commits the |text| to the text input client.
virtual void OnCommit(const base::string16& text) = 0;
// Sets the composition text to the text input client.
virtual void OnPreeditChanged(const CompositionText& composition_text) = 0;
// Cleans up a composition session and makes sure that the composition text is
// cleared.
virtual void OnPreeditEnd() = 0;
// Prepares things for a new composition session.
virtual void OnPreeditStart() = 0;
};
} // namespace ui
#endif // UI_BASE_IME_LINUX_LINUX_INPUT_METHOD_CONTEXT_H_
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