blob: f918ec5f94d342ebc5c6346cdc0a26a70adfb4a4 [file] [log] [blame]
// Copyright 2015 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.
#include "base/containers/flat_map.h"
#include "base/containers/flat_set.h"
#include "base/time/time.h"
namespace ui {
enum class DomCode;
namespace exo {
class Surface;
// Handles events on keyboards in context-specific ways.
class KeyboardDelegate {
// This should return true if |surface| is a valid target for this keyboard.
// E.g. the surface is owned by the same client as the keyboard.
virtual bool CanAcceptKeyboardEventsForSurface(Surface* surface) const = 0;
// Called when keyboard focus enters a new valid target surface.
virtual void OnKeyboardEnter(
Surface* surface,
const base::flat_map<ui::DomCode, ui::DomCode>& pressed_keys) = 0;
// Called when keyboard focus leaves a valid target surface.
virtual void OnKeyboardLeave(Surface* surface) = 0;
// Called when keyboard key state changed. |pressed| is true when |key|
// was pressed and false if it was released. Should return the serial
// number that will be used by the client to acknowledge the change in
// key state.
virtual uint32_t OnKeyboardKey(base::TimeTicks time_stamp,
ui::DomCode key,
bool pressed) = 0;
// Called when keyboard modifier state changed.
virtual void OnKeyboardModifiers(int modifier_flags) = 0;
virtual ~KeyboardDelegate() {}
} // namespace exo