WordPress/wp-includes/js/mce-view.js

349 lines
9.6 KiB
JavaScript

// Ensure the global `wp` object exists.
window.wp = window.wp || {};
(function($){
var views = {},
instances = {};
// Create the `wp.mce` object if necessary.
wp.mce = wp.mce || {};
// wp.mce.view
// -----------
// A set of utilities that simplifies adding custom UI within a TinyMCE editor.
// At its core, it serves as a series of converters, transforming text to a
// custom UI, and back again.
wp.mce.view = {
// ### defaults
defaults: {
// The default properties used for objects with the `pattern` key in
// `wp.mce.view.add()`.
pattern: {
view: Backbone.View,
text: function( instance ) {
return instance.options.original;
},
toView: function( content ) {
if ( ! this.pattern )
return;
this.pattern.lastIndex = 0;
var match = this.pattern.exec( content );
if ( ! match )
return;
return {
index: match.index,
content: match[0],
options: {
original: match[0],
results: match
}
};
}
},
// The default properties used for objects with the `shortcode` key in
// `wp.mce.view.add()`.
shortcode: {
view: Backbone.View,
text: function( instance ) {
return instance.options.shortcode.string();
},
toView: function( content ) {
var match = wp.shortcode.next( this.shortcode, content );
if ( ! match )
return;
return {
index: match.index,
content: match.content,
options: {
shortcode: match.shortcode
}
};
}
}
},
// ### add( id, options )
// Registers a new TinyMCE view.
//
// Accepts a unique `id` and an `options` object.
//
// `options` accepts the following properties:
//
// * `pattern` is the regular expression used to scan the content and
// detect matching views.
//
// * `view` is a `Backbone.View` constructor. If a plain object is
// provided, it will automatically extend the parent constructor
// (usually `Backbone.View`). Views are instantiated when the `pattern`
// is successfully matched. The instance's `options` object is provided
// with the `original` matched value, the match `results` including
// capture groups, and the `viewType`, which is the constructor's `id`.
//
// * `extend` an existing view by passing in its `id`. The current
// view will inherit all properties from the parent view, and if
// `view` is set to a plain object, it will extend the parent `view`
// constructor.
//
// * `text` is a method that accepts an instance of the `view`
// constructor and transforms it into a text representation.
add: function( id, options ) {
var parent, remove, base, properties;
// Fetch the parent view or the default options.
if ( options.extend )
parent = wp.mce.view.get( options.extend );
else if ( options.shortcode )
parent = wp.mce.view.defaults.shortcode;
else
parent = wp.mce.view.defaults.pattern;
// Extend the `options` object with the parent's properties.
_.defaults( options, parent );
options.id = id;
// Create properties used to enhance the view for use in TinyMCE.
properties = {
// Ensure the wrapper element and references to the view are
// removed. Otherwise, removed views could randomly restore.
remove: function() {
delete instances[ this.el.id ];
this.$el.parent().remove();
// Trigger the inherited `remove` method.
if ( remove )
remove.apply( this, arguments );
return this;
}
};
// If the `view` provided was an object, use the parent's
// `view` constructor as a base. If a `view` constructor
// was provided, treat that as the base.
if ( _.isFunction( options.view ) ) {
base = options.view;
} else {
base = parent.view;
remove = options.view.remove;
_.defaults( properties, options.view );
}
// If there's a `remove` method on the `base` view that wasn't
// created by this method, inherit it.
if ( ! remove && ! base._mceview )
remove = base.prototype.remove;
// Automatically create the new `Backbone.View` constructor.
options.view = base.extend( properties, {
// Flag that the new view has been created by `wp.mce.view`.
_mceview: true
});
views[ id ] = options;
},
// ### get( id )
// Returns a TinyMCE view options object.
get: function( id ) {
return views[ id ];
},
// ### remove( id )
// Unregisters a TinyMCE view.
remove: function( id ) {
delete views[ id ];
},
// ### toViews( content )
// Scans a `content` string for each view's pattern, replacing any
// matches with wrapper elements, and creates a new view instance for
// every match.
//
// To render the views, call `wp.mce.view.render( scope )`.
toViews: function( content ) {
var pieces = [ { content: content } ],
current;
_.each( views, function( view, viewType ) {
current = pieces.slice();
pieces = [];
_.each( current, function( piece ) {
var remaining = piece.content,
result;
// Ignore processed pieces, but retain their location.
if ( piece.processed ) {
pieces.push( piece );
return;
}
// Iterate through the string progressively matching views
// and slicing the string as we go.
while ( remaining && (result = view.toView( remaining )) ) {
// Any text before the match becomes an unprocessed piece.
if ( result.index )
pieces.push({ content: remaining.substring( 0, result.index ) });
// Add the processed piece for the match.
pieces.push({
content: wp.mce.view.toView( viewType, result.options ),
processed: true
});
// Update the remaining content.
remaining = remaining.slice( result.index + result.content.length );
}
// There are no additional matches. If any content remains,
// add it as an unprocessed piece.
if ( remaining )
pieces.push({ content: remaining });
});
});
return _.pluck( pieces, 'content' ).join('');
},
toView: function( viewType, options ) {
var view = wp.mce.view.get( viewType ),
instance, id;
if ( ! view )
return '';
// Create a new view instance.
instance = new view.view( _.extend( options || {}, {
viewType: viewType
}) );
// Use the view's `id` if it already exists. Otherwise,
// create a new `id`.
id = instance.el.id = instance.el.id || _.uniqueId('__wpmce-');
instances[ id ] = instance;
// Create a dummy `$wrapper` property to allow `$wrapper` to be
// called in the view's `render` method without a conditional.
instance.$wrapper = $();
return wp.html.string({
// If the view is a span, wrap it in a span.
tag: 'span' === instance.tagName ? 'span' : 'div',
attrs: {
'class': 'wp-view-wrap wp-view-type-' + viewType,
'data-wp-view': id,
'contenteditable': false
}
});
},
// ### render( scope )
// Renders any view instances inside a DOM node `scope`.
//
// View instances are detected by the presence of wrapper elements.
// To generate wrapper elements, pass your content through
// `wp.mce.view.toViews( content )`.
render: function( scope ) {
$( '.wp-view-wrap', scope ).each( function() {
var wrapper = $(this),
view = wp.mce.view.instance( this );
if ( ! view )
return;
// Link the real wrapper to the view.
view.$wrapper = wrapper;
// Render the view.
view.render();
// Detach the view element to ensure events are not unbound.
view.$el.detach();
// Empty the wrapper, attach the view element to the wrapper,
// and add an ending marker to the wrapper to help regexes
// scan the HTML string.
wrapper.empty().append( view.el ).append('<span data-wp-view-end class="wp-view-end"></span>');
});
},
// ### toText( content )
// Scans an HTML `content` string and replaces any view instances with
// their respective text representations.
toText: function( content ) {
return content.replace( /<(?:div|span)[^>]+data-wp-view="([^"]+)"[^>]*>.*?<span[^>]+data-wp-view-end[^>]*><\/span><\/(?:div|span)>/g, function( match, id ) {
var instance = instances[ id ],
view;
if ( instance )
view = wp.mce.view.get( instance.options.viewType );
return instance && view ? view.text( instance ) : '';
});
},
// ### Remove internal TinyMCE attributes.
removeInternalAttrs: function( attrs ) {
var result = {};
_.each( attrs, function( value, attr ) {
if ( -1 === attr.indexOf('data-mce') )
result[ attr ] = value;
});
return result;
},
// ### Parse an attribute string and removes internal TinyMCE attributes.
attrs: function( content ) {
return wp.mce.view.removeInternalAttrs( wp.html.attrs( content ) );
},
// ### instance( scope )
//
// Accepts a MCE view wrapper `node` (i.e. a node with the
// `wp-view-wrap` class).
instance: function( node ) {
var id = $( node ).data('wp-view');
if ( id )
return instances[ id ];
},
// ### Select a view.
//
// Accepts a MCE view wrapper `node` (i.e. a node with the
// `wp-view-wrap` class).
select: function( node ) {
var $node = $(node);
// Bail if node is already selected.
if ( $node.hasClass('selected') )
return;
$node.addClass('selected');
$( node.firstChild ).trigger('select');
},
// ### Deselect a view.
//
// Accepts a MCE view wrapper `node` (i.e. a node with the
// `wp-view-wrap` class).
deselect: function( node ) {
var $node = $(node);
// Bail if node is already selected.
if ( ! $node.hasClass('selected') )
return;
$node.removeClass('selected');
$( node.firstChild ).trigger('deselect');
}
};
}(jQuery));