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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 CHROME_BROWSER_UI_LIBGTKUI_X11_INPUT_METHOD_CONTEXT_IMPL_GTK_H_
#define CHROME_BROWSER_UI_LIBGTKUI_X11_INPUT_METHOD_CONTEXT_IMPL_GTK_H_
#include <vector>
#include "base/containers/hash_tables.h"
#include "base/event_types.h"
#include "base/macros.h"
#include "base/strings/string16.h"
#include "ui/base/glib/glib_integers.h"
#include "ui/base/glib/glib_signal.h"
#include "ui/base/ime/linux/linux_input_method_context.h"
#include "ui/gfx/geometry/rect.h"
typedef union _GdkEvent GdkEvent;
typedef struct _GtkIMContext GtkIMContext;
namespace libgtkui {
// An implementation of LinuxInputMethodContext which is based on X11 event loop
// and uses GtkIMContext(gtk-immodule) as a bridge from/to underlying IMEs.
class X11InputMethodContextImplGtk2 : public ui::LinuxInputMethodContext {
public:
X11InputMethodContextImplGtk2(ui::LinuxInputMethodContextDelegate* delegate,
bool is_simple);
~X11InputMethodContextImplGtk2() override;
// Overriden from ui::LinuxInputMethodContext
bool DispatchKeyEvent(const ui::KeyEvent& key_event) override;
void SetCursorLocation(const gfx::Rect& rect) override;
void Reset() override;
void Focus() override;
void Blur() override;
private:
// Resets the cache of X modifier keycodes.
// TODO(yukishiino): We should call this method whenever X keyboard mapping
// changes, for example when a user switched to another keyboard layout.
void ResetXModifierKeycodesCache();
// Constructs a GdkEventKey from a XKeyEvent and returns it. Otherwise,
// returns NULL. The returned GdkEvent must be freed by gdk_event_free.
GdkEvent* GdkEventFromNativeEvent(const base::NativeEvent& native_event);
// Returns true if the hardware |keycode| is assigned to a modifier key.
bool IsKeycodeModifierKey(unsigned int keycode) const;
// Returns true if one of |keycodes| is pressed. |keybits| is a bit vector
// returned by XQueryKeymap, and |num_keys| is the number of keys in
// |keybits|.
bool IsAnyOfKeycodesPressed(const std::vector<int>& keycodes,
const char* keybits,
int num_keys) const;
// GtkIMContext event handlers. They are shared among |gtk_context_simple_|
// and |gtk_multicontext_|.
CHROMEG_CALLBACK_1(X11InputMethodContextImplGtk2,
void,
OnCommit,
GtkIMContext*,
gchar*);
CHROMEG_CALLBACK_0(X11InputMethodContextImplGtk2,
void,
OnPreeditChanged,
GtkIMContext*);
CHROMEG_CALLBACK_0(X11InputMethodContextImplGtk2,
void,
OnPreeditEnd,
GtkIMContext*);
CHROMEG_CALLBACK_0(X11InputMethodContextImplGtk2,
void,
OnPreeditStart,
GtkIMContext*);
// A set of callback functions. Must not be NULL.
ui::LinuxInputMethodContextDelegate* delegate_;
// IME's input GTK context.
GtkIMContext* gtk_context_;
gpointer gdk_last_set_client_window_;
// Last known caret bounds relative to the screen coordinates.
gfx::Rect last_caret_bounds_;
// A set of hardware keycodes of modifier keys.
base::hash_set<unsigned int> modifier_keycodes_;
// A list of keycodes of each modifier key.
std::vector<int> meta_keycodes_;
std::vector<int> super_keycodes_;
std::vector<int> hyper_keycodes_;
DISALLOW_COPY_AND_ASSIGN(X11InputMethodContextImplGtk2);
};
} // namespace libgtkui
#endif // CHROME_BROWSER_UI_LIBGTKUI_X11_INPUT_METHOD_CONTEXT_IMPL_GTK_H_
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