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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GTK_GTK_UI_PLATFORM_H_
#define UI_GTK_GTK_UI_PLATFORM_H_
#include "base/functional/callback_forward.h"
#include "ui/events/event.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gtk/gtk_compat.h"
using GtkWindow = struct _GtkWindow;
using GtkWidget = struct _GtkWidget;
using GdkWindow = struct _GdkWindow;
namespace ui {
class LinuxInputMethodContext;
class LinuxInputMethodContextDelegate;
} // namespace ui
namespace gtk {
// GtkUiPlatform encapsulates platform-specific functionalities required by
// a Gtk-based LinuxUI implementation.
class GtkUiPlatform {
public:
virtual ~GtkUiPlatform() = default;
// Called when the GtkUi instance initialization process finished. |widget| is
// a dummy window passed in for context.
virtual void OnInitialized(GtkWidget* widget) = 0;
// Gets the GdkKeymap instance, which is used to translate KeyEvents into
// GdkEvents before filtering them through GtkIM API.
virtual GdkKeymap* GetGdkKeymap() = 0;
// Gets the GDK key event state for a KeyEvent.
virtual GdkModifierType GetGdkKeyEventState(
const ui::KeyEvent& key_event) = 0;
// Gets the GDK key event group for a KeyEvent.
virtual int GetGdkKeyEventGroup(const ui::KeyEvent& key_event) = 0;
// Creates/Gets a GdkWindow out of a Aura window id. Caller owns the returned
// object. This function is meant to be used in GtkIM-based IME implementation
// and is supported only in X11 backend (both Aura and Ozone).
virtual GdkWindow* GetGdkWindow(gfx::AcceleratedWidget window_id) = 0;
// Gtk dialog windows must be set transient for the browser window. This
// function abstracts away such functionality.
virtual bool SetGtkWidgetTransientFor(GtkWidget* widget,
gfx::AcceleratedWidget parent) = 0;
virtual void ClearTransientFor(gfx::AcceleratedWidget parent) = 0;
// Presents |window|, doing all the necessary platform-specific operations
// needed, if any.
virtual void ShowGtkWindow(GtkWindow* window) = 0;
// Creates a new IME context or may return nullptr.
virtual std::unique_ptr<ui::LinuxInputMethodContext> CreateInputMethodContext(
ui::LinuxInputMethodContextDelegate* delegate) const = 0;
// If true, the device scale factor should be multiplied by the font scale. If
// false, the font size should be multiplied by the font scale.
virtual bool IncludeFontScaleInDeviceScale() const = 0;
};
} // namespace gtk
#endif // UI_GTK_GTK_UI_PLATFORM_H_
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