Waybar/src/modules/sway/language.cpp

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#include "modules/sway/language.hpp"
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#include <fmt/core.h>
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#include <json/json.h>
#include <spdlog/spdlog.h>
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#include <xkbcommon/xkbregistry.h>
#include <cstring>
#include <string>
#include <vector>
#include "modules/sway/ipc/ipc.hpp"
#include "util/string.hpp"
namespace waybar::modules::sway {
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const std::string Language::XKB_LAYOUT_NAMES_KEY = "xkb_layout_names";
const std::string Language::XKB_ACTIVE_LAYOUT_NAME_KEY = "xkb_active_layout_name";
Language::Language(const std::string& id, const Json::Value& config)
: AButton(config, "language", id, "{}", 0, true) {
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is_variant_displayed = format_.find("{variant}") != std::string::npos;
if (format_.find("{}") != std::string::npos || format_.find("{short}") != std::string::npos) {
displayed_short_flag |= static_cast<std::byte>(DispayedShortFlag::ShortName);
}
if (format_.find("{shortDescription}") != std::string::npos) {
displayed_short_flag |= static_cast<std::byte>(DispayedShortFlag::ShortDescription);
}
if (config.isMember("tooltip-format")) {
tooltip_format_ = config["tooltip-format"].asString();
}
ipc_.subscribe(R"(["input"])");
ipc_.signal_event.connect(sigc::mem_fun(*this, &Language::onEvent));
ipc_.signal_cmd.connect(sigc::mem_fun(*this, &Language::onCmd));
ipc_.sendCmd(IPC_GET_INPUTS);
// Launch worker
ipc_.setWorker([this] {
try {
ipc_.handleEvent();
} catch (const std::exception& e) {
spdlog::error("Language: {}", e.what());
}
});
dp.emit();
}
void Language::onCmd(const struct Ipc::ipc_response& res) {
if (res.type != IPC_GET_INPUTS) {
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return;
}
try {
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std::lock_guard<std::mutex> lock(mutex_);
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auto payload = parser_.parse(res.payload);
std::vector<std::string> used_layouts;
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// Display current layout of a device with a maximum count of layouts, expecting that all will
// be OK
Json::ArrayIndex max_id = 0, max = 0;
for (Json::ArrayIndex i = 0; i < payload.size(); i++) {
auto size = payload[i][XKB_LAYOUT_NAMES_KEY].size();
if (size > max) {
max = size;
max_id = i;
}
}
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for (const auto& layout : payload[max_id][XKB_LAYOUT_NAMES_KEY]) {
used_layouts.push_back(layout.asString());
}
init_layouts_map(used_layouts);
set_current_layout(payload[max_id][XKB_ACTIVE_LAYOUT_NAME_KEY].asString());
dp.emit();
} catch (const std::exception& e) {
spdlog::error("Language: {}", e.what());
}
}
void Language::onEvent(const struct Ipc::ipc_response& res) {
if (res.type != IPC_EVENT_INPUT) {
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return;
}
try {
std::lock_guard<std::mutex> lock(mutex_);
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auto payload = parser_.parse(res.payload)["input"];
if (payload["type"].asString() == "keyboard") {
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set_current_layout(payload[XKB_ACTIVE_LAYOUT_NAME_KEY].asString());
}
dp.emit();
} catch (const std::exception& e) {
spdlog::error("Language: {}", e.what());
}
}
auto Language::update() -> void {
std::lock_guard<std::mutex> lock(mutex_);
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auto display_layout = trim(fmt::format(
format_, fmt::arg("short", layout_.short_name),
fmt::arg("shortDescription", layout_.short_description), fmt::arg("long", layout_.full_name),
fmt::arg("variant", layout_.variant), fmt::arg("flag", layout_.country_flag())));
label_->set_markup(display_layout);
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if (tooltipEnabled()) {
if (tooltip_format_ != "") {
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auto tooltip_display_layout = trim(
fmt::format(tooltip_format_, fmt::arg("short", layout_.short_name),
fmt::arg("shortDescription", layout_.short_description),
fmt::arg("long", layout_.full_name), fmt::arg("variant", layout_.variant),
fmt::arg("flag", layout_.country_flag())));
button_.set_tooltip_markup(tooltip_display_layout);
} else {
button_.set_tooltip_markup(display_layout);
}
}
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event_box_.show();
// Call parent update
AButton::update();
}
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auto Language::set_current_layout(std::string current_layout) -> void {
button_.get_style_context()->remove_class(layout_.short_name);
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layout_ = layouts_map_[current_layout];
button_.get_style_context()->add_class(layout_.short_name);
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}
auto Language::init_layouts_map(const std::vector<std::string>& used_layouts) -> void {
std::map<std::string, std::vector<Layout*>> found_by_short_names;
XKBContext xkb_context;
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auto layout = xkb_context.next_layout();
for (; layout != nullptr; layout = xkb_context.next_layout()) {
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if (std::find(used_layouts.begin(), used_layouts.end(), layout->full_name) ==
used_layouts.end()) {
continue;
}
if (!is_variant_displayed) {
auto short_name = layout->short_name;
if (found_by_short_names.count(short_name) > 0) {
found_by_short_names[short_name].push_back(layout);
} else {
found_by_short_names[short_name] = {layout};
}
}
layouts_map_.emplace(layout->full_name, *layout);
}
if (is_variant_displayed || found_by_short_names.size() == 0) {
return;
}
std::map<std::string, int> short_name_to_number_map;
for (const auto& used_layout_name : used_layouts) {
auto found = layouts_map_.find(used_layout_name);
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if (found == layouts_map_.end()) continue;
auto used_layout = &found->second;
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auto layouts_with_same_name_list = found_by_short_names[used_layout->short_name];
if (layouts_with_same_name_list.size() < 2) {
continue;
}
if (short_name_to_number_map.count(used_layout->short_name) == 0) {
short_name_to_number_map[used_layout->short_name] = 1;
}
if (displayed_short_flag != static_cast<std::byte>(0)) {
int& number = short_name_to_number_map[used_layout->short_name];
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used_layout->short_name = used_layout->short_name + std::to_string(number);
used_layout->short_description = used_layout->short_description + std::to_string(number);
++number;
}
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}
}
Language::XKBContext::XKBContext() {
context_ = rxkb_context_new(RXKB_CONTEXT_LOAD_EXOTIC_RULES);
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rxkb_context_parse_default_ruleset(context_);
}
auto Language::XKBContext::next_layout() -> Layout* {
if (xkb_layout_ == nullptr) {
xkb_layout_ = rxkb_layout_first(context_);
} else {
xkb_layout_ = rxkb_layout_next(xkb_layout_);
}
if (xkb_layout_ == nullptr) {
return nullptr;
}
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auto description = std::string(rxkb_layout_get_description(xkb_layout_));
auto name = std::string(rxkb_layout_get_name(xkb_layout_));
auto variant_ = rxkb_layout_get_variant(xkb_layout_);
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std::string variant = variant_ == nullptr ? "" : std::string(variant_);
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auto short_description_ = rxkb_layout_get_brief(xkb_layout_);
std::string short_description;
if (short_description_ != nullptr) {
short_description = std::string(short_description_);
base_layouts_by_name_.emplace(name, xkb_layout_);
} else {
auto base_layout = base_layouts_by_name_[name];
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short_description =
base_layout == nullptr ? "" : std::string(rxkb_layout_get_brief(base_layout));
}
delete layout_;
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layout_ = new Layout{description, name, variant, short_description};
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return layout_;
}
Language::XKBContext::~XKBContext() {
rxkb_context_unref(context_);
delete layout_;
}
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std::string Language::Layout::country_flag() const {
if (short_name.size() != 2) return "";
unsigned char result[] = "\xf0\x9f\x87\x00\xf0\x9f\x87\x00";
result[3] = short_name[0] + 0x45;
result[7] = short_name[1] + 0x45;
// Check if both emojis are in A-Z symbol bounds
if (result[3] < 0xa6 || result[3] > 0xbf) return "";
if (result[7] < 0xa6 || result[7] > 0xbf) return "";
return std::string{reinterpret_cast<char*>(result)};
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}
} // namespace waybar::modules::sway