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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) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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/os/file_access.h"
#include "core/string/translation.h"
#include "core/string/translation_po.h"
RES TranslationLoaderPO::load_translation(FileAccess *f, Error *r_error) {
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;
String config;
if (r_error) {
*r_error = ERR_FILE_CORRUPT;
}
Ref<TranslationPO> translation = Ref<TranslationPO>(memnew(TranslationPO));
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;
const String path = f->get_path();
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)) {
memdelete(f);
ERR_FAIL_V_MSG(RES(), "Unexpected EOF while reading PO file at: " + path + ":" + itos(line));
} else {
break;
}
}
if (l.begins_with("msgctxt")) {
if (status != STATUS_READING_STRING && status != STATUS_READING_PLURAL) {
memdelete(f);
ERR_FAIL_V_MSG(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 != "") {
if (status == STATUS_READING_STRING) {
translation->add_message(msg_id, msg_str, msg_context);
} else if (status == STATUS_READING_PLURAL) {
if (plural_index != plural_forms - 1) {
memdelete(f);
ERR_FAIL_V_MSG(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) {
memdelete(f);
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) {
memdelete(f);
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")) {
if (status == STATUS_READING_ID) {
memdelete(f);
ERR_FAIL_V_MSG(RES(), "Unexpected 'msgid', was expecting 'msgstr' while parsing: " + path + ":" + itos(line));
}
if (msg_id != "") {
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) {
if (plural_index != plural_forms - 1) {
memdelete(f);
ERR_FAIL_V_MSG(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 == "") {
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[")) {
if (status != STATUS_READING_PLURAL) {
memdelete(f);
ERR_FAIL_V_MSG(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")) {
if (status != STATUS_READING_ID) {
memdelete(f);
ERR_FAIL_V_MSG(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 == "" || l.begins_with("#")) {
if (l.find("fuzzy") != -1) {
skip_next = true;
}
line++;
continue; // Nothing to read or comment.
}
if (!l.begins_with("\"") || status == STATUS_NONE) {
memdelete(f);
ERR_FAIL_V_MSG(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 blackslash 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;
}
if (end_pos == -1) {
memdelete(f);
ERR_FAIL_V_MSG(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) {
msgs_plural.write[plural_index] = msgs_plural[plural_index] + l;
}
line++;
}
memdelete(f);
// Add the last set of data from last iteration.
if (status == STATUS_READING_STRING) {
if (msg_id != "") {
if (!skip_this) {
translation->add_message(msg_id, msg_str, msg_context);
}
} else if (config == "") {
config = msg_str;
}
} else if (status == STATUS_READING_PLURAL) {
if (!skip_this && msg_id != "") {
if (plural_index != plural_forms - 1) {
memdelete(f);
ERR_FAIL_V_MSG(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 == "", 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, bool p_no_cache) {
if (r_error) {
*r_error = ERR_CANT_OPEN;
}
FileAccess *f = FileAccess::open(p_path, FileAccess::READ);
ERR_FAIL_COND_V_MSG(!f, 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");
}
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") {
return "Translation";
}
return "";
}
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