216 lines
6.6 KiB
JavaScript
216 lines
6.6 KiB
JavaScript
// Utility functions for parsing and handling shortcodes in Javascript.
|
|
|
|
// Ensure the global `wp` object exists.
|
|
if ( typeof wp === 'undefined' )
|
|
var wp = {};
|
|
|
|
(function(){
|
|
wp.shortcode = {
|
|
// ### Find the next matching shortcode
|
|
//
|
|
// Given a shortcode `tag`, a block of `text, and an optional starting
|
|
// `index`, returns the next matching shortcode or `undefined`.
|
|
//
|
|
// Shortcodes are formatted as an object that contains the match
|
|
// `content`, the matching `index`, and the parsed `shortcode` object.
|
|
next: function( tag, text, index ) {
|
|
var re = wp.shortcode.regexp( tag ),
|
|
match, result;
|
|
|
|
re.lastIndex = index || 0;
|
|
match = re.exec( text );
|
|
|
|
if ( ! match )
|
|
return;
|
|
|
|
// If we matched an escaped shortcode, try again.
|
|
if ( match[1] === '[' && match[6] === ']' )
|
|
return wp.shortcode.next( tag, text, re.lastIndex );
|
|
|
|
result = {
|
|
index: match.index,
|
|
content: match[0],
|
|
shortcode: new wp.shortcode.Match( match )
|
|
};
|
|
|
|
// If we matched a leading `[`, strip it from the match
|
|
// and increment the index accordingly.
|
|
if ( match[1] ) {
|
|
result.match = result.match.slice( 1 );
|
|
result.index++;
|
|
}
|
|
|
|
// If we matched a trailing `]`, strip it from the match.
|
|
if ( match[6] )
|
|
result.match = result.match.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, closing, content, right, offset ) {
|
|
// 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( new wp.shortcode.Match( 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 shortcode RegExp.
|
|
//
|
|
// 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. An extra `]` to allow for escaping shortcodes with double `[[]]`
|
|
regexp: _.memoize( function( tag ) {
|
|
return new RegExp( '\\[(\\[?)(' + tag + ')\\b([^\\]\\/]*(?:\\/(?!\\])[^\\]\\/]*)*?)(?:(\\/)\\]|\\](?:([^\\[]*(?:\\[(?!\\/\\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()`
|
|
// in `wp-includes/shortcodes.php`.
|
|
//
|
|
// Capture groups:
|
|
//
|
|
// 1. An attribute name, that corresponds to...
|
|
// 2. a value in double quotes.
|
|
// 3. An attribute name, that corresponds to...
|
|
// 4. a value in single quotes.
|
|
// 5. An attribute name, that corresponds to...
|
|
// 6. an unquoted value.
|
|
// 7. A numeric attribute in double quotes.
|
|
// 8. An unquoted numeric attribute.
|
|
pattern = /(\w+)\s*=\s*"([^"]*)"(?:\s|$)|(\w+)\s*=\s*\'([^\']*)\'(?:\s|$)|(\w+)\s*=\s*([^\s\'"]+)(?:\s|$)|"([^"]*)"(?:\s|$)|(\S+)(?:\s|$)/g;
|
|
|
|
// Map zero-width spaces to actual spaces.
|
|
text = text.replace( /[\u00a0\u200b]/g, ' ' );
|
|
|
|
// Match and normalize attributes.
|
|
while ( (match = pattern.exec( text )) ) {
|
|
if ( match[1] ) {
|
|
named[ match[1].toLowerCase() ] = match[2];
|
|
} else if ( match[3] ) {
|
|
named[ match[3].toLowerCase() ] = match[4];
|
|
} else if ( match[5] ) {
|
|
named[ match[5].toLowerCase() ] = match[6];
|
|
} else if ( match[7] ) {
|
|
numeric.push( match[7] );
|
|
} else if ( match[8] ) {
|
|
numeric.push( match[8] );
|
|
}
|
|
}
|
|
|
|
return {
|
|
named: named,
|
|
numeric: numeric
|
|
};
|
|
})
|
|
};
|
|
|
|
|
|
// Shortcode Matches
|
|
// -----------------
|
|
//
|
|
// Shortcode matches are generated automatically when using
|
|
// `wp.shortcode.next()` and `wp.shortcode.replace()`. These two methods
|
|
// should handle most shortcode needs.
|
|
//
|
|
// Accepts a `match` object from calling `regexp.exec()` on a `RegExp`
|
|
// generated by `wp.shortcode.regexp()`. `match` can also be set to the
|
|
// `arguments` from a callback passed to `regexp.replace()`.
|
|
wp.shortcode.Match = function( match ) {
|
|
this.tag = match[2];
|
|
this.attrs = wp.shortcode.attrs( match[3] );
|
|
this.single = !! match[4];
|
|
this.content = match[5];
|
|
};
|
|
|
|
_.extend( wp.shortcode.Match.prototype, {
|
|
// ### Get a shortcode attribute.
|
|
//
|
|
// Automatically detects whether `attr` is named or numeric and routes
|
|
// it accordingly.
|
|
get: function( attr ) {
|
|
return this.attrs[ _.isNumber( attr ) ? 'numeric' : 'named' ][ attr ];
|
|
},
|
|
|
|
// ### Set a shortcode attribute.
|
|
//
|
|
// Automatically detects whether `attr` is named or numeric and routes
|
|
// it accordingly.
|
|
set: function( attr, value ) {
|
|
this.attrs[ _.isNumber( attr ) ? 'numeric' : 'named' ][ attr ] = value;
|
|
return this;
|
|
},
|
|
|
|
// ### Transform the shortcode match into text.
|
|
text: function() {
|
|
var text = '[' + this.tag;
|
|
|
|
_.each( this.attrs.numeric, function( value ) {
|
|
if ( /\s/.test( value ) )
|
|
text += ' "' + value + '"';
|
|
else
|
|
text += ' ' + value;
|
|
});
|
|
|
|
_.each( this.attrs.named, function( value, name ) {
|
|
text += ' ' + name + '="' + value + '"';
|
|
});
|
|
|
|
// If the tag is marked as singular, self-close the tag and
|
|
// ignore any additional content.
|
|
if ( this.single )
|
|
return text + ' /]';
|
|
|
|
// Complete the opening tag.
|
|
text += ']';
|
|
|
|
if ( this.content )
|
|
text += this.content;
|
|
|
|
// Add the closing tag.
|
|
return text + '[/' + this.tag + ']';
|
|
}
|
|
});
|
|
}());
|