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