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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.
#include "components/exo/xkb_tracker.h"
#if BUILDFLAG(USE_XKBCOMMON)
#include "components/exo/keyboard_modifiers.h"
#include "ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.h"
#endif
namespace exo {
#if BUILDFLAG(USE_XKBCOMMON)
XkbTracker::XkbTracker() {
UpdateKeyboardLayoutInternal(nullptr);
UpdateKeyboardModifiersInternal();
}
#else
XkbTracker::XkbTracker() = default;
#endif
XkbTracker::~XkbTracker() = default;
#if BUILDFLAG(USE_XKBCOMMON)
void XkbTracker::UpdateKeyboardLayout(const std::string& name) {
std::string layout_id, layout_variant;
ui::XkbKeyboardLayoutEngine::ParseLayoutName(name, &layout_id,
&layout_variant);
xkb_rule_names names = {.rules = nullptr,
.model = "pc101",
.layout = layout_id.c_str(),
.variant = layout_variant.c_str(),
.options = ""};
UpdateKeyboardLayoutInternal(&names);
UpdateKeyboardModifiersInternal();
}
void XkbTracker::UpdateKeyboardModifiers(int modifier_flags) {
// CrOS treats numlock as always on, but its event flags actually have that
// key disabled, (i.e. chromeos apps specially handle numpad key events as
// though numlock is on). In order to get the same result from the linux apps,
// we need to ensure they always treat numlock as on.
modifier_flags_ = modifier_flags | ui::EF_NUM_LOCK_ON;
UpdateKeyboardModifiersInternal();
}
uint32_t XkbTracker::GetKeysym(uint32_t xkb_keycode) const {
return xkb_state_key_get_one_sym(xkb_state_.get(), xkb_keycode);
}
std::unique_ptr<char, base::FreeDeleter> XkbTracker::GetKeymap() const {
return std::unique_ptr<char, base::FreeDeleter>(
xkb_keymap_get_as_string(xkb_keymap_.get(), XKB_KEYMAP_FORMAT_TEXT_V1));
}
KeyboardModifiers XkbTracker::GetModifiers() const {
return {
xkb_state_serialize_mods(xkb_state_.get(), XKB_STATE_MODS_DEPRESSED),
xkb_state_serialize_mods(xkb_state_.get(), XKB_STATE_MODS_LOCKED),
xkb_state_serialize_mods(xkb_state_.get(), XKB_STATE_MODS_LATCHED),
xkb_state_serialize_layout(xkb_state_.get(), XKB_STATE_LAYOUT_EFFECTIVE),
};
}
void XkbTracker::UpdateKeyboardLayoutInternal(const xkb_rule_names* names) {
xkb_keymap_.reset(xkb_keymap_new_from_names(xkb_context_.get(), names,
XKB_KEYMAP_COMPILE_NO_FLAGS));
xkb_state_.reset(xkb_state_new(xkb_keymap_.get()));
xkb_modifier_converter_ =
ui::XkbModifierConverter::CreateFromKeymap(xkb_keymap_.get());
}
void XkbTracker::UpdateKeyboardModifiersInternal() {
xkb_mod_mask_t xkb_modifiers =
xkb_modifier_converter_.MaskFromUiFlags(modifier_flags_);
xkb_state_update_mask(xkb_state_.get(), xkb_modifiers, 0, 0, 0, 0, 0);
}
#endif // BUILDFLAG(USE_XKBCOMMON)
} // namespace exo
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