223 lines
8.9 KiB
JavaScript
223 lines
8.9 KiB
JavaScript
// babel-plugin-react-translate
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// (c) Vitaliy Filippov 2021+
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// SPDX-License-Identifier: LGPL-3.0
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const fs = require('fs');
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module.exports = function(babel)
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{
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const t = babel.types;
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const importAdded = new WeakSet();
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const arg0 = new WeakSet();
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const regexp = new WeakMap();
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const ru = /[А-ЯЁа-яё]/;
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const strings = {};
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const getRegexp = function(state)
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{
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let re = regexp.get(state.opts);
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if (!re)
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{
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re = new RegExp(state.opts.regexp || '[А-ЯЁа-яё]');
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regexp.set(state.opts, re);
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}
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return re;
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};
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const splitWhite = function(str)
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{
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let l = /^\s+/.exec(str), r = /\s+$/.exec(str);
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l = l ? l[0] : '';
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r = r ? r[0] : '';
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return [ l, str.substr(l.length, str.length-r.length-l.length), r ];
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};
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const withWhite = function(l, repl, r)
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{
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if (l)
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repl = t.binaryExpression('+', t.stringLiteral(l), repl);
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if (r)
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repl = t.binaryExpression('+', repl, t.stringLiteral(r));
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return repl;
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};
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const addString = function(path, str)
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{
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strings[path.hub.file.opts.filename][str] = str;
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};
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const addImport = function(path)
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{
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const program = path.findParent(p => t.isProgram(p));
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if (!program)
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{
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throw new Error('<Program> AST element not found, can\'t add import');
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}
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if (!importAdded.has(program))
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{
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program.unshiftContainer('body', t.importDeclaration(
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[ t.importSpecifier(t.identifier('L'), t.identifier('L')) ],
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t.stringLiteral('babel-plugin-react-translate/runtime')
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));
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importAdded.add(program);
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}
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};
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return {
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visitor: {
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Program: {
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enter(path, state)
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{
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strings[path.hub.file.opts.filename] = {};
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},
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exit(path, state)
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{
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let found = false;
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for (let k in strings[path.hub.file.opts.filename])
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{
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found = true;
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break;
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}
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if (!found)
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delete strings[path.hub.file.opts.filename];
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const arrays = { ...strings };
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for (let k in arrays)
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arrays[k] = Object.keys(arrays[k]);
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fs.writeFileSync(
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path.hub.file.opts.root+'/'+(state.opts['output'] || 'react-translate-output.json'),
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JSON.stringify(arrays, null, 2)
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);
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},
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},
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// Convert concatenated string literals and expressions to localization calls with arguments
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// I.e. 'Really delete '+item.name+'?' -> L('Really delete {1}?', item.name)
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BinaryExpression(path, state)
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{
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if (path.node.operator === '+')
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{
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let added = [ path.node.left, path.node.right ];
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for (let i = 0; i < added.length; i++)
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{
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if (t.isBinaryExpression(added[i]) && added[i].operator === '+')
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{
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added.splice(i, 1, added[i].left, added[i].right);
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i--;
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}
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}
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let ru = getRegexp(state);
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let i18n = false;
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for (let i = 0; i < added.length; i++)
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{
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if (t.isStringLiteral(added[i]) && ru.exec(added[i].value))
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{
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i18n = true;
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break;
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}
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}
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if (i18n)
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{
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let tpl = '', expressions = [];
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let lit = true, i = 0;
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while (i < added.length)
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{
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if (lit)
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{
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let text = '';
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while (i < added.length && t.isStringLiteral(added[i]))
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text += added[i++].value;
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tpl += text;
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}
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else
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{
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let expr = null;
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while (i < added.length && !t.isStringLiteral(added[i]))
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expr = expr ? t.binaryExpression('+', expr, added[i++]) : added[i++];
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expressions.push(expr);
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tpl += '{'+expressions.length+'}';
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}
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lit = !lit;
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}
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let [ lwhite, text, rwhite ] = splitWhite(tpl);
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addString(path, text);
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text = t.stringLiteral(text);
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// Stop the string literal from being visited again
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arg0.add(text);
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let repl = t.callExpression(t.identifier('L'), [ text, ...expressions ]);
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repl = withWhite(lwhite, repl, rwhite);
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path.replaceWith(repl);
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}
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}
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},
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// Convert simple string literals to localization calls
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// I.e. "Hello" -> L("Hello")
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Literal(path, state)
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{
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let ru = getRegexp(state);
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if (ru.exec(path.node.value))
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{
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const parent = path.findParent(() => true);
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const isJSX = parent.isJSXAttribute();
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if (isJSX || !arg0.has(path.node) && !path.findParent(parent => arg0.has(parent.node)))
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{
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const [ lwhite, text, rwhite ] = splitWhite(path.node.value);
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addString(path, text);
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addImport(path);
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let repl = t.callExpression(t.identifier('L'), [ t.stringLiteral(text) ]);
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repl = withWhite(lwhite, repl, rwhite);
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if (isJSX)
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path.replaceWith(t.jsxExpressionContainer(repl));
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else
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{
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// Stop the original string from being visited again
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arg0.add(repl);
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path.replaceWith(repl);
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}
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}
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}
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},
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CallExpression(path)
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{
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if (path.node.callee.type === 'Identifier' && path.node.callee.name === 'L')
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{
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// Skip the first argument
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arg0.add(path.node.arguments[0]);
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}
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},
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// Convert simple JSX literals to localization calls
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// I.e. <b>Text</b> -> <b>{L("Text")}</b>
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JSXText(path, state)
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{
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let ru = getRegexp(state);
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if (ru.exec(path.node.value))
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{
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const [ lwhite, text, rwhite ] = splitWhite(path.node.value);
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addImport(path);
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addString(path, text);
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const repl = [];
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if (lwhite)
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repl.push(t.jsxText(lwhite));
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repl.push(t.jsxExpressionContainer(t.callExpression(t.identifier('L'), [ t.stringLiteral(text) ])));
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if (rwhite)
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repl.push(t.jsxText(rwhite));
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path.replaceWithMultiple(repl);
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}
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},
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// Convert template literals to localization calls with arguments
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// I.e. `Really delete ${item.name}?` -> L("Really delete {1}?", item.name)
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TemplateLiteral(path, state)
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{
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let ru = getRegexp(state);
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if (path.node.quasis.find(q => ru.exec(q.value.cooked)))
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{
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addImport(path);
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let tpl = path.node.quasis[0].value.cooked;
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for (let i = 1; i < path.node.quasis.length; i++)
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tpl += '{'+i+'}'+path.node.quasis[i].value.cooked;
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let [ lwhite, text, rwhite ] = splitWhite(tpl);
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addString(path, text);
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text = t.stringLiteral(text);
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// Stop the string literal from being visited again
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arg0.add(text);
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let repl = t.callExpression(t.identifier('L'), [ text, ...path.node.expressions ]);
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repl = withWhite(lwhite, repl, rwhite);
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path.replaceWith(repl);
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}
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},
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},
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};
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}
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