// If we matched a leading `[`, strip it from the match
// and increment the index accordingly.
if ( match[1] ) {
result.content = result.content.slice( 1 );
result.index++;
}
// If we matched a trailing `]`, strip it from the match.
if ( match[7] ) {
result.content = result.content.slice( 0, -1 );
}
return result;
},
// ### Replace matching shortcodes in a block of text
//
// Accepts a shortcode `tag`, content `text` to scan, and a `callback`
// to process the shortcode matches and return a replacement string.
// Returns the `text` with all shortcodes replaced.
//
// Shortcode matches are objects that contain the shortcode `tag`,
// a shortcode `attrs` object, the `content` between shortcode tags,
// and a boolean flag to indicate if the match was a `single` tag.
replace: function( tag, text, callback ) {
return text.replace( wp.shortcode.regexp( tag ), function( match, left, tag, attrs, slash, content, closing, right ) {
// If both extra brackets exist, the shortcode has been
// properly escaped.
if ( left === '[' && right === ']' ) {
return match;
}
// Create the match object and pass it through the callback.
var result = callback( wp.shortcode.fromMatch( arguments ) );
// Make sure to return any of the extra brackets if they
// weren't used to escape the shortcode.
return result ? left + result + right : match;
});
},
// ### Generate a string from shortcode parameters
//
// Creates a `wp.shortcode` instance and returns a string.
//
// Accepts the same `options` as the `wp.shortcode()` constructor,
// containing a `tag` string, a string or object of `attrs`, a boolean
// indicating whether to format the shortcode using a `single` tag, and a
// `content` string.
string: function( options ) {
return new wp.shortcode( options ).string();
},
// ### Generate a RegExp to identify a shortcode
//
// The base regex is functionally equivalent to the one found in
// `get_shortcode_regex()` in `wp-includes/shortcodes.php`.
//
// Capture groups:
//
// 1. An extra `[` to allow for escaping shortcodes with double `[[]]`
// 2. The shortcode name
// 3. The shortcode argument list
// 4. The self closing `/`
// 5. The content of a shortcode when it wraps some content.
// 6. The closing tag.
// 7. An extra `]` to allow for escaping shortcodes with double `[[]]`
regexp: _.memoize( function( tag ) {
return new RegExp( '\\[(\\[?)(' + tag + ')(?![\\w-])([^\\]\\/]*(?:\\/(?!\\])[^\\]\\/]*)*?)(?:(\\/)\\]|\\](?:([^\\[]*(?:\\[(?!\\/\\2\\])[^\\[]*)*)(\\[\\/\\2\\]))?)(\\]?)', 'g' );
}),
// ### Parse shortcode attributes
//
// Shortcodes accept many types of attributes. These can chiefly be
// divided into named and numeric attributes:
//
// Named attributes are assigned on a key/value basis, while numeric
// attributes are treated as an array.
//
// Named attributes can be formatted as either `name="value"`,
// `name='value'`, or `name=value`. Numeric attributes can be formatted
// as `"value"` or just `value`.
attrs: _.memoize( function( text ) {
var named = {},
numeric = [],
pattern, match;
// This regular expression is reused from `shortcode_parse_atts()`