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godot/core/io/translation_loader_po.cpp

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/*************************************************************************/
/* translation_loader_po.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "translation_loader_po.h"
#include "core/io/file_access.h"
#include "core/string/translation.h"
#include "core/string/translation_po.h"
RES TranslationLoaderPO::load_translation(Ref<FileAccess> f, Error *r_error) {
if (r_error) {
*r_error = ERR_FILE_CORRUPT;
}
const String path = f->get_path();
Ref<TranslationPO> translation = Ref<TranslationPO>(memnew(TranslationPO));
String config;
uint32_t magic = f->get_32();
if (magic == 0x950412de) {
// Load binary MO file.
uint16_t version_maj = f->get_16();
uint16_t version_min = f->get_16();
ERR_FAIL_COND_V_MSG(version_maj > 1, RES(), vformat("Unsupported MO file %s, version %d.%d.", path, version_maj, version_min));
uint32_t num_strings = f->get_32();
uint32_t id_table_offset = f->get_32();
uint32_t trans_table_offset = f->get_32();
// Read string tables.
for (uint32_t i = 0; i < num_strings; i++) {
String msg_id;
String msg_id_plural;
String msg_context;
// Read id strings and context.
{
Vector<uint8_t> data;
f->seek(id_table_offset + i * 8);
uint32_t str_start = 0;
uint32_t str_len = f->get_32();
uint32_t str_offset = f->get_32();
data.resize(str_len + 1);
f->seek(str_offset);
f->get_buffer(data.ptrw(), str_len);
data.write[str_len] = 0;
bool is_plural = false;
for (uint32_t j = 0; j < str_len + 1; j++) {
if (data[j] == 0x04) {
msg_context.parse_utf8((const char *)data.ptr(), j);
str_start = j + 1;
}
if (data[j] == 0x00) {
if (is_plural) {
msg_id_plural.parse_utf8((const char *)(data.ptr() + str_start), j - str_start);
} else {
msg_id.parse_utf8((const char *)(data.ptr() + str_start), j - str_start);
is_plural = true;
}
str_start = j + 1;
}
}
}
// Read translated strings.
{
Vector<uint8_t> data;
f->seek(trans_table_offset + i * 8);
uint32_t str_len = f->get_32();
uint32_t str_offset = f->get_32();
data.resize(str_len + 1);
f->seek(str_offset);
f->get_buffer(data.ptrw(), str_len);
data.write[str_len] = 0;
if (msg_id.is_empty()) {
config = String::utf8((const char *)data.ptr(), str_len);
// Record plural rule.
int p_start = config.find("Plural-Forms");
if (p_start != -1) {
int p_end = config.find("\n", p_start);
translation->set_plural_rule(config.substr(p_start, p_end - p_start));
}
} else {
uint32_t str_start = 0;
Vector<String> plural_msg;
for (uint32_t j = 0; j < str_len + 1; j++) {
if (data[j] == 0x00) {
if (msg_id_plural.is_empty()) {
translation->add_message(msg_id, String::utf8((const char *)(data.ptr() + str_start), j - str_start), msg_context);
} else {
plural_msg.push_back(String::utf8((const char *)(data.ptr() + str_start), j - str_start));
}
str_start = j + 1;
}
}
if (!plural_msg.is_empty()) {
translation->add_plural_message(msg_id, plural_msg, msg_context);
}
}
}
}
} else {
// Try to load as text PO file.
f->seek(0);
enum Status {
STATUS_NONE,
STATUS_READING_ID,
STATUS_READING_STRING,
STATUS_READING_CONTEXT,
STATUS_READING_PLURAL,
};
Status status = STATUS_NONE;
String msg_id;
String msg_str;
String msg_context;
Vector<String> msgs_plural;
if (r_error) {
*r_error = ERR_FILE_CORRUPT;
}
int line = 1;
int plural_forms = 0;
int plural_index = -1;
bool entered_context = false;
bool skip_this = false;
bool skip_next = false;
bool is_eof = false;
while (!is_eof) {
String l = f->get_line().strip_edges();
is_eof = f->eof_reached();
// If we reached last line and it's not a content line, break, otherwise let processing that last loop
if (is_eof && l.is_empty()) {
if (status == STATUS_READING_ID || status == STATUS_READING_CONTEXT || (status == STATUS_READING_PLURAL && plural_index != plural_forms - 1)) {
ERR_FAIL_V_MSG(RES(), "Unexpected EOF while reading PO file at: " + path + ":" + itos(line));
} else {
break;
}
}
if (l.begins_with("msgctxt")) {
ERR_FAIL_COND_V_MSG(status != STATUS_READING_STRING && status != STATUS_READING_PLURAL, RES(), "Unexpected 'msgctxt', was expecting 'msgid_plural' or 'msgstr' before 'msgctxt' while parsing: " + path + ":" + itos(line));
// In PO file, "msgctxt" appears before "msgid". If we encounter a "msgctxt", we add what we have read
// and set "entered_context" to true to prevent adding twice.
if (!skip_this && !msg_id.is_empty()) {
if (status == STATUS_READING_STRING) {
translation->add_message(msg_id, msg_str, msg_context);
} else if (status == STATUS_READING_PLURAL) {
ERR_FAIL_COND_V_MSG(plural_index != plural_forms - 1, RES(), "Number of 'msgstr[]' doesn't match with number of plural forms: " + path + ":" + itos(line));
translation->add_plural_message(msg_id, msgs_plural, msg_context);
}
}
msg_context = "";
l = l.substr(7, l.length()).strip_edges();
status = STATUS_READING_CONTEXT;
entered_context = true;
}
if (l.begins_with("msgid_plural")) {
if (plural_forms == 0) {
ERR_FAIL_V_MSG(RES(), "PO file uses 'msgid_plural' but 'Plural-Forms' is invalid or missing in header: " + path + ":" + itos(line));
} else if (status != STATUS_READING_ID) {
ERR_FAIL_V_MSG(RES(), "Unexpected 'msgid_plural', was expecting 'msgid' before 'msgid_plural' while parsing: " + path + ":" + itos(line));
}
// We don't record the message in "msgid_plural" itself as tr_n(), TTRN(), RTRN() interfaces provide the plural string already.
// We just have to reset variables related to plurals for "msgstr[]" later on.
l = l.substr(12, l.length()).strip_edges();
plural_index = -1;
msgs_plural.clear();
msgs_plural.resize(plural_forms);
status = STATUS_READING_PLURAL;
} else if (l.begins_with("msgid")) {
ERR_FAIL_COND_V_MSG(status == STATUS_READING_ID, RES(), "Unexpected 'msgid', was expecting 'msgstr' while parsing: " + path + ":" + itos(line));
if (!msg_id.is_empty()) {
if (!skip_this && !entered_context) {
if (status == STATUS_READING_STRING) {
translation->add_message(msg_id, msg_str, msg_context);
} else if (status == STATUS_READING_PLURAL) {
ERR_FAIL_COND_V_MSG(plural_index != plural_forms - 1, RES(), "Number of 'msgstr[]' doesn't match with number of plural forms: " + path + ":" + itos(line));
translation->add_plural_message(msg_id, msgs_plural, msg_context);
}
}
} else if (config.is_empty()) {
config = msg_str;
// Record plural rule.
int p_start = config.find("Plural-Forms");
if (p_start != -1) {
int p_end = config.find("\n", p_start);
translation->set_plural_rule(config.substr(p_start, p_end - p_start));
plural_forms = translation->get_plural_forms();
}
}
l = l.substr(5, l.length()).strip_edges();
status = STATUS_READING_ID;
// If we did not encounter msgctxt, we reset context to empty to reset it.
if (!entered_context) {
msg_context = "";
}
msg_id = "";
msg_str = "";
skip_this = skip_next;
skip_next = false;
entered_context = false;
}
if (l.begins_with("msgstr[")) {
ERR_FAIL_COND_V_MSG(status != STATUS_READING_PLURAL, RES(), "Unexpected 'msgstr[]', was expecting 'msgid_plural' before 'msgstr[]' while parsing: " + path + ":" + itos(line));
plural_index++; // Increment to add to the next slot in vector msgs_plural.
l = l.substr(9, l.length()).strip_edges();
} else if (l.begins_with("msgstr")) {
ERR_FAIL_COND_V_MSG(status != STATUS_READING_ID, RES(), "Unexpected 'msgstr', was expecting 'msgid' before 'msgstr' while parsing: " + path + ":" + itos(line));
l = l.substr(6, l.length()).strip_edges();
status = STATUS_READING_STRING;
}
if (l.is_empty() || l.begins_with("#")) {
if (l.contains("fuzzy")) {
skip_next = true;
}
line++;
continue; // Nothing to read or comment.
}
ERR_FAIL_COND_V_MSG(!l.begins_with("\"") || status == STATUS_NONE, RES(), "Invalid line '" + l + "' while parsing: " + path + ":" + itos(line));
l = l.substr(1, l.length());
// Find final quote, ignoring escaped ones (\").
// The escape_next logic is necessary to properly parse things like \\"
// where the backslash is the one being escaped, not the quote.
int end_pos = -1;
bool escape_next = false;
for (int i = 0; i < l.length(); i++) {
if (l[i] == '\\' && !escape_next) {
escape_next = true;
continue;
}
if (l[i] == '"' && !escape_next) {
end_pos = i;
break;
}
escape_next = false;
}
ERR_FAIL_COND_V_MSG(end_pos == -1, RES(), "Expected '\"' at end of message while parsing: " + path + ":" + itos(line));
l = l.substr(0, end_pos);
l = l.c_unescape();
if (status == STATUS_READING_ID) {
msg_id += l;
} else if (status == STATUS_READING_STRING) {
msg_str += l;
} else if (status == STATUS_READING_CONTEXT) {
msg_context += l;
} else if (status == STATUS_READING_PLURAL && plural_index >= 0) {
ERR_FAIL_COND_V_MSG(plural_index >= plural_forms, RES(), "Unexpected plural form while parsing: " + path + ":" + itos(line));
msgs_plural.write[plural_index] = msgs_plural[plural_index] + l;
}
line++;
}
// Add the last set of data from last iteration.
if (status == STATUS_READING_STRING) {
if (!msg_id.is_empty()) {
if (!skip_this) {
translation->add_message(msg_id, msg_str, msg_context);
}
} else if (config.is_empty()) {
config = msg_str;
}
} else if (status == STATUS_READING_PLURAL) {
if (!skip_this && !msg_id.is_empty()) {
ERR_FAIL_COND_V_MSG(plural_index != plural_forms - 1, RES(), "Number of 'msgstr[]' doesn't match with number of plural forms: " + path + ":" + itos(line));
translation->add_plural_message(msg_id, msgs_plural, msg_context);
}
}
}
ERR_FAIL_COND_V_MSG(config.is_empty(), RES(), "No config found in file: " + path + ".");
Vector<String> configs = config.split("\n");
for (int i = 0; i < configs.size(); i++) {
String c = configs[i].strip_edges();
int p = c.find(":");
if (p == -1) {
continue;
}
String prop = c.substr(0, p).strip_edges();
String value = c.substr(p + 1, c.length()).strip_edges();
if (prop == "X-Language" || prop == "Language") {
translation->set_locale(value);
}
}
if (r_error) {
*r_error = OK;
}
return translation;
}
RES 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) {
if (r_error) {
*r_error = ERR_CANT_OPEN;
}
Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ);
ERR_FAIL_COND_V_MSG(f.is_null(), RES(), "Cannot open file '" + p_path + "'.");
return load_translation(f, r_error);
}
void TranslationLoaderPO::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("po");
p_extensions->push_back("mo");
}
bool TranslationLoaderPO::handles_type(const String &p_type) const {
return (p_type == "Translation");
}
String TranslationLoaderPO::get_resource_type(const String &p_path) const {
if (p_path.get_extension().to_lower() == "po" || p_path.get_extension().to_lower() == "mo") {
return "Translation";
}
return "";
}
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