88 lines
2 KiB
JavaScript
88 lines
2 KiB
JavaScript
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'use strict';
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var posix = require('posix-character-classes');
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module.exports = function(brackets) {
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brackets.compiler
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/**
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* Escaped characters
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*/
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.set('escape', function(node) {
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return this.emit('\\' + node.val.replace(/^\\/, ''), node);
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})
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/**
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* Text
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*/
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.set('text', function(node) {
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return this.emit(node.val.replace(/([{}])/g, '\\$1'), node);
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})
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/**
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* POSIX character classes
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*/
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.set('posix', function(node) {
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if (node.val === '[::]') {
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return this.emit('\\[::\\]', node);
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}
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var val = posix[node.inner];
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if (typeof val === 'undefined') {
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val = '[' + node.inner + ']';
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}
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return this.emit(val, node);
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})
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/**
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* Non-posix brackets
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*/
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.set('bracket', function(node) {
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return this.mapVisit(node.nodes);
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})
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.set('bracket.open', function(node) {
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return this.emit(node.val, node);
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})
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.set('bracket.inner', function(node) {
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var inner = node.val;
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if (inner === '[' || inner === ']') {
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return this.emit('\\' + node.val, node);
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}
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if (inner === '^]') {
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return this.emit('^\\]', node);
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}
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if (inner === '^') {
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return this.emit('^', node);
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}
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if (/-/.test(inner) && !/(\d-\d|\w-\w)/.test(inner)) {
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inner = inner.split('-').join('\\-');
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}
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var isNegated = inner.charAt(0) === '^';
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// add slashes to negated brackets, per spec
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if (isNegated && inner.indexOf('/') === -1) {
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inner += '/';
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}
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if (isNegated && inner.indexOf('.') === -1) {
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inner += '.';
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}
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// don't unescape `0` (octal literal)
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inner = inner.replace(/\\([1-9])/g, '$1');
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return this.emit(inner, node);
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})
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.set('bracket.close', function(node) {
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var val = node.val.replace(/^\\/, '');
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if (node.parent.escaped === true) {
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return this.emit('\\' + val, node);
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}
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return this.emit(val, node);
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});
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};
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