godot/doc/classes/EditorTranslationParserPlugin.xml

<?xml version="1.0" encoding="UTF-8" ?>
<class name="EditorTranslationParserPlugin" inherits="RefCounted" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
	<brief_description>
		Plugin for adding custom parsers to extract strings that are to be translated from custom files (.csv, .json etc.).
	</brief_description>
	<description>
		[EditorTranslationParserPlugin] is invoked when a file is being parsed to extract strings that require translation. To define the parsing and string extraction logic, override the [method _parse_file] method in script.
		The return value should be an [Array] of [PackedStringArray]s, one for each extracted translatable string. Each entry should contain [code][msgid, msgctxt, msgid_plural, comment, source_line][/code], where all except [code]msgid[/code] are optional. Empty strings will be ignored.
		The extracted strings will be written into a POT file selected by user under "POT Generation" in "Localization" tab in "Project Settings" menu.
		Below shows an example of a custom parser that extracts strings from a CSV file to write into a POT.
		[codeblocks]
		[gdscript]
		@tool
		extends EditorTranslationParserPlugin

		func _parse_file(path):
			var ret: Array[PackedStringArray] = []
			var file = FileAccess.open(path, FileAccess.READ)
			var text = file.get_as_text()
			var split_strs = text.split(",", false)
			for s in split_strs:
				ret.append(PackedStringArray([s]))
				#print("Extracted string: " + s)

			return ret

		func _get_recognized_extensions():
			return ["csv"]
		[/gdscript]
		[csharp]
		using Godot;

		[Tool]
		public partial class CustomParser : EditorTranslationParserPlugin
		{
			public override Godot.Collections.Array&lt;string[]&gt; _ParseFile(string path)
			{
				Godot.Collections.Array&lt;string[]&gt; ret;
				using var file = FileAccess.Open(path, FileAccess.ModeFlags.Read);
				string text = file.GetAsText();
				string[] splitStrs = text.Split(",", allowEmpty: false);
				foreach (string s in splitStrs)
				{
					ret.Add([s]);
					//GD.Print($"Extracted string: {s}");
				}
				return ret;
			}

			public override string[] _GetRecognizedExtensions()
			{
				return ["csv"];
			}
		}
		[/csharp]
		[/codeblocks]
		To add a translatable string associated with a context, plural, comment, or source line:
		[codeblocks]
		[gdscript]
		# This will add a message with msgid "Test 1", msgctxt "context", msgid_plural "test 1 plurals", comment "test 1 comment", and source line "7".
		ret.append(PackedStringArray(["Test 1", "context", "test 1 plurals", "test 1 comment", "7"]))
		# This will add a message with msgid "A test without context" and msgid_plural "plurals".
		ret.append(PackedStringArray(["A test without context", "", "plurals"]))
		# This will add a message with msgid "Only with context" and msgctxt "a friendly context".
		ret.append(PackedStringArray(["Only with context", "a friendly context"]))
		[/gdscript]
		[csharp]
		// This will add a message with msgid "Test 1", msgctxt "context", msgid_plural "test 1 plurals", comment "test 1 comment", and source line "7".
		ret.Add(["Test 1", "context", "test 1 plurals", "test 1 comment", "7"]);
		// This will add a message with msgid "A test without context" and msgid_plural "plurals".
		ret.Add(["A test without context", "", "plurals"]);
		// This will add a message with msgid "Only with context" and msgctxt "a friendly context".
		ret.Add(["Only with context", "a friendly context"]);
		[/csharp]
		[/codeblocks]
		[b]Note:[/b] If you override parsing logic for standard script types (GDScript, C#, etc.), it would be better to load the [code]path[/code] argument using [method ResourceLoader.load]. This is because built-in scripts are loaded as [Resource] type, not [FileAccess] type. For example:
		[codeblocks]
		[gdscript]
		func _parse_file(path):
			var res = ResourceLoader.load(path, "Script")
			var text = res.source_code
			# Parsing logic.

		func _get_recognized_extensions():
			return ["gd"]
		[/gdscript]
		[csharp]
		public override Godot.Collections.Array&lt;string[]&gt; _ParseFile(string path)
		{
			var res = ResourceLoader.Load&lt;Script&gt;(path, "Script");
			string text = res.SourceCode;
			// Parsing logic.
		}

		public override string[] _GetRecognizedExtensions()
		{
			return ["gd"];
		}
		[/csharp]
		[/codeblocks]
		To use [EditorTranslationParserPlugin], register it using the [method EditorPlugin.add_translation_parser_plugin] method first.
	</description>
	<tutorials>
	</tutorials>
	<methods>
		<method name="_get_recognized_extensions" qualifiers="virtual const">
			<return type="PackedStringArray" />
			<description>
				Gets the list of file extensions to associate with this parser, e.g. [code]["csv"][/code].
			</description>
		</method>
		<method name="_parse_file" qualifiers="virtual">
			<return type="PackedStringArray[]" />
			<param index="0" name="path" type="String" />
			<description>
				Override this method to define a custom parsing logic to extract the translatable strings.
			</description>
		</method>
	</methods>
</class>