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// Copyright 2016 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 "ui/ozone/platform/wayland/wayland_keyboard.h"
#include <sys/mman.h>
#include "base/files/scoped_file.h"
#include "ui/base/ui_features.h"
#include "ui/events/base_event_utils.h"
#include "ui/events/event.h"
#include "ui/events/keycodes/dom/dom_code.h"
#include "ui/events/keycodes/dom/keycode_converter.h"
#include "ui/events/ozone/layout/keyboard_layout_engine.h"
#include "ui/events/ozone/layout/keyboard_layout_engine_manager.h"
#include "ui/events/ozone/layout/layout_util.h"
#include "ui/ozone/platform/wayland/wayland_connection.h"
#include "ui/ozone/platform/wayland/wayland_window.h"
#if BUILDFLAG(USE_XKBCOMMON)
#include "ui/ozone/platform/wayland/wayland_xkb_keyboard_layout_engine.h"
#endif
namespace ui {
namespace {
const int kXkbKeycodeOffset = 8;
} // namespace
// static
const wl_callback_listener WaylandKeyboard::callback_listener_ = {
WaylandKeyboard::SyncCallback,
};
WaylandKeyboard::WaylandKeyboard(wl_keyboard* keyboard,
const EventDispatchCallback& callback)
: obj_(keyboard), callback_(callback), auto_repeat_handler_(this) {
static const wl_keyboard_listener listener = {
&WaylandKeyboard::Keymap, &WaylandKeyboard::Enter,
&WaylandKeyboard::Leave, &WaylandKeyboard::Key,
&WaylandKeyboard::Modifiers, &WaylandKeyboard::RepeatInfo,
};
#if BUILDFLAG(USE_XKBCOMMON)
auto* engine = static_cast<WaylandXkbKeyboardLayoutEngine*>(
KeyboardLayoutEngineManager::GetKeyboardLayoutEngine());
engine->SetEventModifiers(&event_modifiers_);
#endif
wl_keyboard_add_listener(obj_.get(), &listener, this);
// TODO(tonikitoo): Default auto-repeat to ON here?
}
WaylandKeyboard::~WaylandKeyboard() {}
void WaylandKeyboard::Keymap(void* data,
wl_keyboard* obj,
uint32_t format,
int32_t raw_fd,
uint32_t size) {
base::ScopedFD fd(raw_fd);
if (!data || format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1)
return;
char* keymap_str = reinterpret_cast<char*>(
mmap(nullptr, size, PROT_READ, MAP_SHARED, fd.get(), 0));
if (keymap_str == MAP_FAILED)
return;
bool success =
KeyboardLayoutEngineManager::GetKeyboardLayoutEngine()
->SetCurrentLayoutFromBuffer(keymap_str, strnlen(keymap_str, size));
DCHECK(success) << "Failed to set the XKB keyboard mapping.";
munmap(keymap_str, size);
}
void WaylandKeyboard::Enter(void* data,
wl_keyboard* obj,
uint32_t serial,
wl_surface* surface,
wl_array* keys) {
// wl_surface might have been destroyed by this time.
if (surface)
WaylandWindow::FromSurface(surface)->set_keyboard_focus(true);
}
void WaylandKeyboard::Leave(void* data,
wl_keyboard* obj,
uint32_t serial,
wl_surface* surface) {
// wl_surface might have been destroyed by this time.
if (surface)
WaylandWindow::FromSurface(surface)->set_keyboard_focus(false);
WaylandKeyboard* keyboard = static_cast<WaylandKeyboard*>(data);
DCHECK(keyboard);
// Upon window focus lose, reset the key repeat timers.
keyboard->auto_repeat_handler_.StopKeyRepeat();
}
void WaylandKeyboard::Key(void* data,
wl_keyboard* obj,
uint32_t serial,
uint32_t time,
uint32_t key,
uint32_t state) {
WaylandKeyboard* keyboard = static_cast<WaylandKeyboard*>(data);
DCHECK(keyboard);
keyboard->connection_->set_serial(serial);
bool down = state == WL_KEYBOARD_KEY_STATE_PRESSED;
int device_id = keyboard->obj_.id();
keyboard->auto_repeat_handler_.UpdateKeyRepeat(
key, down, false /*suppress_auto_repeat*/, device_id);
// TODO(tonikitoo,msisov): Handler 'repeat' parameter below.
keyboard->DispatchKey(key, down, false /*repeat*/, EventTimeForNow(),
device_id);
}
void WaylandKeyboard::Modifiers(void* data,
wl_keyboard* obj,
uint32_t serial,
uint32_t mods_depressed,
uint32_t mods_latched,
uint32_t mods_locked,
uint32_t group) {
#if BUILDFLAG(USE_XKBCOMMON)
auto* engine = static_cast<WaylandXkbKeyboardLayoutEngine*>(
KeyboardLayoutEngineManager::GetKeyboardLayoutEngine());
engine->UpdateModifiers(mods_depressed, mods_latched, mods_locked, group);
#endif
}
void WaylandKeyboard::RepeatInfo(void* data,
wl_keyboard* obj,
int32_t rate,
int32_t delay) {
WaylandKeyboard* keyboard = static_cast<WaylandKeyboard*>(data);
DCHECK(keyboard);
keyboard->auto_repeat_handler_.SetAutoRepeatRate(
base::TimeDelta::FromMilliseconds(delay),
base::TimeDelta::FromMilliseconds(rate));
}
void WaylandKeyboard::FlushInput(base::OnceClosure closure) {
if (sync_callback_)
return;
auto_repeat_closure_ = std::move(closure);
// wl_display_sync gives a chance for any key "up" events to arrive.
// With a well behaved wayland compositor this should ensure we never
// get spurious repeats.
sync_callback_.reset(wl_display_sync(connection_->display()));
wl_callback_add_listener(sync_callback_.get(), &callback_listener_, this);
wl_display_flush(connection_->display());
}
void WaylandKeyboard::DispatchKey(uint32_t key,
bool down,
bool repeat,
base::TimeTicks timestamp,
int device_id) {
DomCode dom_code =
KeycodeConverter::NativeKeycodeToDomCode(key + kXkbKeycodeOffset);
if (dom_code == ui::DomCode::NONE)
return;
uint8_t flags = event_modifiers_.GetModifierFlags();
DomKey dom_key;
KeyboardCode key_code;
if (!KeyboardLayoutEngineManager::GetKeyboardLayoutEngine()->Lookup(
dom_code, flags, &dom_key, &key_code))
return;
if (!repeat) {
int flag = ModifierDomKeyToEventFlag(dom_key);
UpdateModifier(flag, down);
}
ui::KeyEvent event(down ? ET_KEY_PRESSED : ET_KEY_RELEASED, key_code,
dom_code, event_modifiers_.GetModifierFlags(), dom_key,
timestamp);
event.set_source_device_id(device_id);
callback_.Run(&event);
}
void WaylandKeyboard::SyncCallback(void* data,
struct wl_callback* cb,
uint32_t time) {
WaylandKeyboard* keyboard = static_cast<WaylandKeyboard*>(data);
DCHECK(keyboard);
std::move(keyboard->auto_repeat_closure_).Run();
DCHECK(keyboard->auto_repeat_closure_.is_null());
keyboard->sync_callback_.reset();
}
void WaylandKeyboard::UpdateModifier(int modifier_flag, bool down) {
if (modifier_flag == EF_NONE)
return;
int modifier = EventModifiers::GetModifierFromEventFlag(modifier_flag);
if (modifier == MODIFIER_NONE)
return;
// This mimics KeyboardEvDev, which matches chrome/x11.
// Currently EF_MOD3_DOWN means that the CapsLock key is currently down,
// and EF_CAPS_LOCK_ON means the caps lock state is enabled (and the
// key may or may not be down, but usually isn't). There does need to
// to be two different flags, since the physical CapsLock key is subject
// to remapping, but the caps lock state (which can be triggered in a
// variety of ways) is not.
if (modifier == MODIFIER_CAPS_LOCK)
event_modifiers_.UpdateModifier(MODIFIER_MOD3, down);
else
event_modifiers_.UpdateModifier(modifier, down);
}
} // namespace ui
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