1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
// 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 COMPONENTS_EXO_XKB_TRACKER_H_
#define COMPONENTS_EXO_XKB_TRACKER_H_
#include <memory>
#include <string>
#include "ui/base/buildflags.h"
#if BUILDFLAG(USE_XKBCOMMON)
#include <xkbcommon/xkbcommon.h>
#include "base/memory/free_deleter.h"
#include "ui/events/event_constants.h"
#include "ui/events/keycodes/scoped_xkb.h" // nogncheck
#include "ui/events/ozone/layout/xkb/xkb_modifier_converter.h"
#endif
namespace exo {
struct KeyboardModifiers;
// Tracks the state of XKB. If Chrome is configured not to link against
// libxkbcommon this class is empty.
// TODO(hidehiko): Share the state between wl_keyboard and zwp_text_input.
class XkbTracker {
public:
XkbTracker();
XkbTracker(const XkbTracker&) = delete;
XkbTracker& operator=(const XkbTracker&) = delete;
~XkbTracker();
#if BUILDFLAG(USE_XKBCOMMON)
// Updates the XKB keymap based on the given keyboard layout name.
void UpdateKeyboardLayout(const std::string& name);
// Updates the XKB modifier state. |modifier_flags| is a bitset of
// ui::EventFlags.
void UpdateKeyboardModifiers(int modifier_flags);
// Returns the keysym for the given XKB keycode, based on the current
// keymap and its modifier state.
uint32_t GetKeysym(uint32_t xkb_keycode) const;
// Returns the XKB keymap data.
std::unique_ptr<char, base::FreeDeleter> GetKeymap() const;
// Returns the current keyboard modifiers.
KeyboardModifiers GetModifiers() const;
private:
void UpdateKeyboardLayoutInternal(const xkb_rule_names* names);
void UpdateKeyboardModifiersInternal();
// Keeps the modifiers, so that modifiers can be recalculated
// on keyboard layout update.
// For CrOS we treat numlock as always on.
int modifier_flags_ = ui::EF_NUM_LOCK_ON;
// The XKB state used for the keyboard.
std::unique_ptr<xkb_context, ui::XkbContextDeleter> xkb_context_{
xkb_context_new(XKB_CONTEXT_NO_FLAGS)};
std::unique_ptr<xkb_keymap, ui::XkbKeymapDeleter> xkb_keymap_;
std::unique_ptr<xkb_state, ui::XkbStateDeleter> xkb_state_;
ui::XkbModifierConverter xkb_modifier_converter_{{}};
#endif // BUILDFLAG(USE_XKBCOMMON)
};
} // namespace exo
#endif // COMPONENTS_EXO_XKB_TRACKER_H_
|
