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372 lines
14 KiB
C++
372 lines
14 KiB
C++
/**************************************************************************/
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/* translation_loader_po.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "translation_loader_po.h"
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#include "core/io/file_access.h"
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#include "core/string/translation_po.h"
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Ref<Resource> TranslationLoaderPO::load_translation(Ref<FileAccess> f, Error *r_error) {
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if (r_error) {
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*r_error = ERR_FILE_CORRUPT;
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}
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const String path = f->get_path();
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Ref<TranslationPO> translation = Ref<TranslationPO>(memnew(TranslationPO));
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String config;
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uint32_t magic = f->get_32();
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if (magic == 0x950412de) {
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// Load binary MO file.
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uint16_t version_maj = f->get_16();
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uint16_t version_min = f->get_16();
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ERR_FAIL_COND_V_MSG(version_maj > 1, Ref<Resource>(), vformat("Unsupported MO file %s, version %d.%d.", path, version_maj, version_min));
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uint32_t num_strings = f->get_32();
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uint32_t id_table_offset = f->get_32();
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uint32_t trans_table_offset = f->get_32();
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// Read string tables.
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for (uint32_t i = 0; i < num_strings; i++) {
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String msg_id;
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String msg_id_plural;
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String msg_context;
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// Read id strings and context.
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{
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Vector<uint8_t> data;
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f->seek(id_table_offset + i * 8);
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uint32_t str_start = 0;
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uint32_t str_len = f->get_32();
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uint32_t str_offset = f->get_32();
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data.resize(str_len + 1);
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f->seek(str_offset);
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f->get_buffer(data.ptrw(), str_len);
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data.write[str_len] = 0;
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bool is_plural = false;
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for (uint32_t j = 0; j < str_len + 1; j++) {
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if (data[j] == 0x04) {
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msg_context.parse_utf8((const char *)data.ptr(), j);
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str_start = j + 1;
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}
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if (data[j] == 0x00) {
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if (is_plural) {
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msg_id_plural.parse_utf8((const char *)(data.ptr() + str_start), j - str_start);
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} else {
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msg_id.parse_utf8((const char *)(data.ptr() + str_start), j - str_start);
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is_plural = true;
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}
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str_start = j + 1;
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}
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}
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}
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// Read translated strings.
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{
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Vector<uint8_t> data;
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f->seek(trans_table_offset + i * 8);
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uint32_t str_len = f->get_32();
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uint32_t str_offset = f->get_32();
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data.resize(str_len + 1);
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f->seek(str_offset);
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f->get_buffer(data.ptrw(), str_len);
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data.write[str_len] = 0;
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if (msg_id.is_empty()) {
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config = String::utf8((const char *)data.ptr(), str_len);
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// Record plural rule.
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int p_start = config.find("Plural-Forms");
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if (p_start != -1) {
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int p_end = config.find_char('\n', p_start);
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translation->set_plural_rule(config.substr(p_start, p_end - p_start));
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}
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} else {
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uint32_t str_start = 0;
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Vector<String> plural_msg;
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for (uint32_t j = 0; j < str_len + 1; j++) {
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if (data[j] == 0x00) {
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if (msg_id_plural.is_empty()) {
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translation->add_message(msg_id, String::utf8((const char *)(data.ptr() + str_start), j - str_start), msg_context);
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} else {
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plural_msg.push_back(String::utf8((const char *)(data.ptr() + str_start), j - str_start));
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}
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str_start = j + 1;
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}
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}
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if (!plural_msg.is_empty()) {
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translation->add_plural_message(msg_id, plural_msg, msg_context);
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}
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}
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}
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}
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} else {
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// Try to load as text PO file.
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f->seek(0);
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enum Status {
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STATUS_NONE,
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STATUS_READING_ID,
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STATUS_READING_STRING,
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STATUS_READING_CONTEXT,
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STATUS_READING_PLURAL,
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};
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Status status = STATUS_NONE;
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String msg_id;
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String msg_str;
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String msg_context;
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Vector<String> msgs_plural;
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if (r_error) {
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*r_error = ERR_FILE_CORRUPT;
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}
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int line = 1;
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int plural_forms = 0;
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int plural_index = -1;
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bool entered_context = false;
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bool skip_this = false;
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bool skip_next = false;
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bool is_eof = false;
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while (!is_eof) {
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String l = f->get_line().strip_edges();
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is_eof = f->eof_reached();
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// If we reached last line and it's not a content line, break, otherwise let processing that last loop
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if (is_eof && l.is_empty()) {
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if (status == STATUS_READING_ID || status == STATUS_READING_CONTEXT || (status == STATUS_READING_PLURAL && plural_index != plural_forms - 1)) {
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ERR_FAIL_V_MSG(Ref<Resource>(), vformat("Unexpected EOF while reading PO file at: %s:%d.", path, line));
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} else {
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break;
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}
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}
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if (l.begins_with("msgctxt")) {
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ERR_FAIL_COND_V_MSG(status != STATUS_READING_STRING && status != STATUS_READING_PLURAL, Ref<Resource>(), vformat("Unexpected 'msgctxt', was expecting 'msgid_plural' or 'msgstr' before 'msgctxt' while parsing: %s:%d.", path, line));
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// In PO file, "msgctxt" appears before "msgid". If we encounter a "msgctxt", we add what we have read
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// and set "entered_context" to true to prevent adding twice.
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if (!skip_this && !msg_id.is_empty()) {
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if (status == STATUS_READING_STRING) {
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translation->add_message(msg_id, msg_str, msg_context);
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} else if (status == STATUS_READING_PLURAL) {
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ERR_FAIL_COND_V_MSG(plural_index != plural_forms - 1, Ref<Resource>(), vformat("Number of 'msgstr[]' doesn't match with number of plural forms: %s:%d.", path, line));
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translation->add_plural_message(msg_id, msgs_plural, msg_context);
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}
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}
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msg_context = "";
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l = l.substr(7, l.length()).strip_edges();
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status = STATUS_READING_CONTEXT;
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entered_context = true;
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}
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if (l.begins_with("msgid_plural")) {
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if (plural_forms == 0) {
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ERR_FAIL_V_MSG(Ref<Resource>(), vformat("PO file uses 'msgid_plural' but 'Plural-Forms' is invalid or missing in header: %s:%d.", path, line));
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} else if (status != STATUS_READING_ID) {
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ERR_FAIL_V_MSG(Ref<Resource>(), vformat("Unexpected 'msgid_plural', was expecting 'msgid' before 'msgid_plural' while parsing: %s:%d.", path, line));
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}
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// We don't record the message in "msgid_plural" itself as tr_n(), TTRN(), RTRN() interfaces provide the plural string already.
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// We just have to reset variables related to plurals for "msgstr[]" later on.
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l = l.substr(12, l.length()).strip_edges();
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plural_index = -1;
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msgs_plural.clear();
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msgs_plural.resize(plural_forms);
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status = STATUS_READING_PLURAL;
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} else if (l.begins_with("msgid")) {
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ERR_FAIL_COND_V_MSG(status == STATUS_READING_ID, Ref<Resource>(), vformat("Unexpected 'msgid', was expecting 'msgstr' while parsing: %s:%d.", path, line));
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if (!msg_id.is_empty()) {
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if (!skip_this && !entered_context) {
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if (status == STATUS_READING_STRING) {
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translation->add_message(msg_id, msg_str, msg_context);
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} else if (status == STATUS_READING_PLURAL) {
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ERR_FAIL_COND_V_MSG(plural_index != plural_forms - 1, Ref<Resource>(), vformat("Number of 'msgstr[]' doesn't match with number of plural forms: %s:%d.", path, line));
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translation->add_plural_message(msg_id, msgs_plural, msg_context);
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}
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}
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} else if (config.is_empty()) {
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config = msg_str;
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// Record plural rule.
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int p_start = config.find("Plural-Forms");
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if (p_start != -1) {
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int p_end = config.find_char('\n', p_start);
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translation->set_plural_rule(config.substr(p_start, p_end - p_start));
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plural_forms = translation->get_plural_forms();
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}
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}
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l = l.substr(5, l.length()).strip_edges();
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status = STATUS_READING_ID;
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// If we did not encounter msgctxt, we reset context to empty to reset it.
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if (!entered_context) {
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msg_context = "";
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}
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msg_id = "";
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msg_str = "";
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skip_this = skip_next;
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skip_next = false;
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entered_context = false;
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}
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if (l.begins_with("msgstr[")) {
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ERR_FAIL_COND_V_MSG(status != STATUS_READING_PLURAL, Ref<Resource>(), vformat("Unexpected 'msgstr[]', was expecting 'msgid_plural' before 'msgstr[]' while parsing: %s:%d.", path, line));
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plural_index++; // Increment to add to the next slot in vector msgs_plural.
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l = l.substr(9, l.length()).strip_edges();
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} else if (l.begins_with("msgstr")) {
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ERR_FAIL_COND_V_MSG(status != STATUS_READING_ID, Ref<Resource>(), vformat("Unexpected 'msgstr', was expecting 'msgid' before 'msgstr' while parsing: %s:%d.", path, line));
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l = l.substr(6, l.length()).strip_edges();
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status = STATUS_READING_STRING;
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}
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if (l.is_empty() || l.begins_with("#")) {
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if (l.contains("fuzzy")) {
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skip_next = true;
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}
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line++;
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continue; // Nothing to read or comment.
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}
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ERR_FAIL_COND_V_MSG(!l.begins_with("\"") || status == STATUS_NONE, Ref<Resource>(), vformat("Invalid line '%s' while parsing: %s:%d.", l, path, line));
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l = l.substr(1, l.length());
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// Find final quote, ignoring escaped ones (\").
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// The escape_next logic is necessary to properly parse things like \\"
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// where the backslash is the one being escaped, not the quote.
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int end_pos = -1;
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bool escape_next = false;
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for (int i = 0; i < l.length(); i++) {
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if (l[i] == '\\' && !escape_next) {
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escape_next = true;
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continue;
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}
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if (l[i] == '"' && !escape_next) {
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end_pos = i;
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break;
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}
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escape_next = false;
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}
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ERR_FAIL_COND_V_MSG(end_pos == -1, Ref<Resource>(), vformat("Expected '\"' at end of message while parsing: %s:%d.", path, line));
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l = l.substr(0, end_pos);
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l = l.c_unescape();
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if (status == STATUS_READING_ID) {
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msg_id += l;
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} else if (status == STATUS_READING_STRING) {
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msg_str += l;
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} else if (status == STATUS_READING_CONTEXT) {
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msg_context += l;
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} else if (status == STATUS_READING_PLURAL && plural_index >= 0) {
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ERR_FAIL_COND_V_MSG(plural_index >= plural_forms, Ref<Resource>(), vformat("Unexpected plural form while parsing: %s:%d.", path, line));
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msgs_plural.write[plural_index] = msgs_plural[plural_index] + l;
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}
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line++;
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}
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// Add the last set of data from last iteration.
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if (status == STATUS_READING_STRING) {
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if (!msg_id.is_empty()) {
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if (!skip_this) {
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translation->add_message(msg_id, msg_str, msg_context);
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}
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} else if (config.is_empty()) {
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config = msg_str;
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}
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} else if (status == STATUS_READING_PLURAL) {
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if (!skip_this && !msg_id.is_empty()) {
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ERR_FAIL_COND_V_MSG(plural_index != plural_forms - 1, Ref<Resource>(), vformat("Number of 'msgstr[]' doesn't match with number of plural forms: %s:%d.", path, line));
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translation->add_plural_message(msg_id, msgs_plural, msg_context);
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}
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}
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}
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ERR_FAIL_COND_V_MSG(config.is_empty(), Ref<Resource>(), vformat("No config found in file: '%s'.", path));
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Vector<String> configs = config.split("\n");
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for (int i = 0; i < configs.size(); i++) {
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String c = configs[i].strip_edges();
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int p = c.find_char(':');
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if (p == -1) {
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continue;
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}
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String prop = c.substr(0, p).strip_edges();
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String value = c.substr(p + 1, c.length()).strip_edges();
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if (prop == "X-Language" || prop == "Language") {
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translation->set_locale(value);
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}
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}
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if (r_error) {
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*r_error = OK;
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}
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return translation;
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}
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Ref<Resource> TranslationLoaderPO::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, CacheMode p_cache_mode) {
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if (r_error) {
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*r_error = ERR_CANT_OPEN;
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}
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Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ);
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ERR_FAIL_COND_V_MSG(f.is_null(), Ref<Resource>(), vformat("Cannot open file '%s'.", p_path));
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return load_translation(f, r_error);
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}
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void TranslationLoaderPO::get_recognized_extensions(List<String> *p_extensions) const {
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p_extensions->push_back("po");
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p_extensions->push_back("mo");
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}
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bool TranslationLoaderPO::handles_type(const String &p_type) const {
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return (p_type == "Translation") || (p_type == "TranslationPO");
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}
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String TranslationLoaderPO::get_resource_type(const String &p_path) const {
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if (p_path.get_extension().to_lower() == "po" || p_path.get_extension().to_lower() == "mo") {
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return "Translation";
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}
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return "";
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}
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