mediawiki-extensions-Visual.../modules/ve/dm/ve.dm.Annotation.js
Ed Sanders 3f3e0c0721 Split continued link annotations on wordbreaks
For now this approach is bit of a hack and will hopefully
be replaced with an ability to cursor either side of an
annotation.

Bug: 51463
Change-Id: I701e3d26e06a28fed2d4950b1d418eda80a1fac5
2013-07-24 11:50:26 +01:00

176 lines
5.6 KiB
JavaScript

/*!
* VisualEditor DataModel Annotation class.
*
* @copyright 2011-2013 VisualEditor Team and others; see AUTHORS.txt
* @license The MIT License (MIT); see LICENSE.txt
*/
/**
* Generic DataModel annotation.
*
* This is an abstract class, annotations should extend this and call this constructor from their
* constructor. You should not instantiate this class directly.
*
* Annotations in the linear model are instances of subclasses of this class. Subclasses should
* only override static properties and functions.
*
* @class
* @extends {ve.dm.Model}
* @constructor
* @param {Object} element Linear model annotation
*/
ve.dm.Annotation = function VeDmAnnotation( element ) {
// Parent constructor
ve.dm.Model.call( this, element );
// Properties
this.name = this.constructor.static.name; // For ease of filtering
};
/* Inheritance */
ve.inheritClass( ve.dm.Annotation, ve.dm.Model );
/* Static properties */
/**
* About grouping is not supported for annotations; setting this to true has no effect.
*
* @static
* @property {boolean} static.enableAboutGrouping
* @inheritable
*/
ve.dm.Annotation.static.enableAboutGrouping = false;
/**
* Automatically apply annotation to content inserted after it.
*
* @type {boolean}
*/
ve.dm.Annotation.static.applyToAppendedContent = true;
/**
* Abandon continuation when a wordbreak is generated
*
* @type {boolean}
*/
ve.dm.Annotation.static.splitOnWordbreak = false;
/**
* Static function to convert a linear model data element for this annotation type back to
* a DOM element.
*
* As special facilities for annotations, the annotated content that the returned element will
* wrap around is passed in as childDomElements, and this function may return an empty array to
* indicate that the annotation should produce no output. In that case, the child DOM elements will
* not be wrapped in anything and will be inserted directly into this annotation's parent.
*
* @static
* @inheritable
* @method
* @param {Object|Array} dataElement Linear model element or array of linear model data
* @param {HTMLDocument} doc HTML document for creating elements
* @param {ve.dm.Converter} converter Converter object to optionally call .getDomSubtreeFromData() on
* @param {HTMLElement[]} childDomElements Children that will be appended to the returned element
* @returns {HTMLElement[]} Array of DOM elements; only the first element is used; may be empty
*/
ve.dm.Annotation.static.toDomElements = function ( /*dataElement, doc, converter, childDomElements*/ ) {
throw new Error( 've.dm.Annotation subclass must implement toDomElements' );
};
/* Methods */
/**
* Convenience wrapper for .toDomElements() on the current annotation
* @method
* @param {HTMLDocument} [doc] HTML document to use to create elements
* @see ve.dm.Model#toDomElements
*/
ve.dm.Annotation.prototype.getDomElements = function ( doc ) {
return this.constructor.static.toDomElements( this.element, doc || document );
};
/**
* Get an object containing comparable annotation properties.
*
* This is used by the converter to merge adjacent annotations.
*
* @returns {Object} An object containing a subset of the annotation's properties
*/
ve.dm.Annotation.prototype.getComparableObject = function () {
var hashObject = this.getHashObject();
delete hashObject.htmlAttributes;
return hashObject;
};
/**
* HACK: This method strips data-parsoid from HTML attributes for comparisons.
*
* This should be removed once similar annotation merging is handled correctly
* by Parsoid.
*
* @returns {Object} An object all HTML attributes except data-parsoid
*/
ve.dm.Annotation.prototype.getComparableHtmlAttributes = function () {
var comparableAttributes, attributes = this.getHtmlAttributes();
if ( attributes[0] ) {
comparableAttributes = ve.copyObject( attributes[0].values );
delete comparableAttributes['data-parsoid'];
return comparableAttributes;
} else {
return {};
}
};
/**
* HACK: This method adds in HTML attributes so comparable objects aren't serialized
* together if they have different HTML attributes.
*
* This method needs to be different from getComparableObject which is
* still used for editing annotations.
*
* @returns {Object} An object containing a subset of the annotation's properties and HTML attributes
*/
ve.dm.Annotation.prototype.getComparableObjectForSerialization = function () {
var object = this.getComparableObject(),
htmlAttributes = this.getComparableHtmlAttributes();
if ( !ve.isEmptyObject( htmlAttributes ) ) {
object.htmlAttributes = htmlAttributes;
}
return object;
};
/**
* HACK: Check if the annotation was generated by the converter
*
* Used by compareToForSerialization to avoid merging generated annotations.
*
* @returns {boolean} The annotation was generated
*/
ve.dm.Annotation.prototype.isGenerated = function () {
var attributes = this.getHtmlAttributes();
return attributes[0] && attributes[0].values && attributes[0].values['data-parsoid'];
};
/**
* HACK: Compare to another annotation for serialization
*
* Compares two annotations using getComparableObjectForSerialization, unless
* they are both generated annotations, in which case they must be identical.
*
* @param {ve.dm.Annotation} annotation Annotation to compare to
* @returns {boolean} The other annotation is similar to this one
*/
ve.dm.Annotation.prototype.compareToForSerialization = function ( annotation ) {
// If both annotations were generated
if ( this.isGenerated() && annotation.isGenerated() ) {
return ve.compare( this, annotation );
}
return ve.compare(
this.getComparableObjectForSerialization(),
annotation.getComparableObjectForSerialization()
);
};