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4e65c4dae4
Makes CharacterMapFile::load_from_file and CharacterMap::load_from_file return ErrorOr instead of Optional. This makes them a little nicer to use and a little easier to read, as they seem to have been approximating this.
82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
/*
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* Copyright (c) 2020, Hüseyin Aslıtürk <asliturk@hotmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "CharacterMapFile.h"
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#include <AK/ByteBuffer.h>
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#include <AK/Utf8View.h>
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#include <LibCore/File.h>
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namespace Keyboard {
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ErrorOr<CharacterMapData> CharacterMapFile::load_from_file(const String& filename)
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{
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auto path = filename;
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if (!path.ends_with(".json")) {
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StringBuilder full_path;
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full_path.append("/res/keymaps/");
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full_path.append(filename);
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full_path.append(".json");
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path = full_path.to_string();
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}
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auto file = TRY(Core::File::open(path, Core::OpenMode::ReadOnly));
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auto file_contents = file->read_all();
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auto json_result = TRY(JsonValue::from_string(file_contents));
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const auto& json = json_result.as_object();
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Vector<u32> map = read_map(json, "map");
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Vector<u32> shift_map = read_map(json, "shift_map");
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Vector<u32> alt_map = read_map(json, "alt_map");
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Vector<u32> altgr_map = read_map(json, "altgr_map");
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Vector<u32> shift_altgr_map = read_map(json, "shift_altgr_map");
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CharacterMapData character_map;
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for (int i = 0; i < CHAR_MAP_SIZE; i++) {
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character_map.map[i] = map.at(i);
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character_map.shift_map[i] = shift_map.at(i);
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character_map.alt_map[i] = alt_map.at(i);
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if (altgr_map.is_empty()) {
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// AltGr map was not found, using Alt map as fallback.
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character_map.altgr_map[i] = alt_map.at(i);
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} else {
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character_map.altgr_map[i] = altgr_map.at(i);
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}
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if (shift_altgr_map.is_empty()) {
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// Shift+AltGr map was not found, using Alt map as fallback.
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character_map.shift_altgr_map[i] = alt_map.at(i);
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} else {
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character_map.shift_altgr_map[i] = shift_altgr_map.at(i);
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}
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}
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return character_map;
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}
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Vector<u32> CharacterMapFile::read_map(const JsonObject& json, const String& name)
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{
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if (!json.has(name))
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return {};
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Vector<u32> buffer;
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buffer.resize(CHAR_MAP_SIZE);
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auto map_arr = json.get(name).as_array();
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for (size_t i = 0; i < map_arr.size(); i++) {
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auto key_value = map_arr.at(i).as_string();
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if (key_value.length() == 0) {
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buffer[i] = 0;
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} else if (key_value.length() == 1) {
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buffer[i] = key_value.characters()[0];
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} else {
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Utf8View m_utf8_view(key_value);
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buffer[i] = *m_utf8_view.begin();
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}
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}
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return buffer;
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}
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}
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