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'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);
});
};
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