mediawiki-extensions-Discus.../modules/ThreadItem.js

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/**
* @external CommentItem
*/
var utils = require( './utils.js' );
/**
* A thread item, either a heading or a comment
*
* @class ThreadItem
* @constructor
* @param {string} type `heading` or `comment`
* @param {number} level Item level in the thread tree
* @param {Object} range Object describing the extent of the comment, including the
* signature and timestamp. It has the same properties as a Range object: `startContainer`,
* `startOffset`, `endContainer`, `endOffset` (we don't use a real Range because they change
* magically when the DOM structure changes).
*/
function ThreadItem( type, level, range ) {
this.type = type;
this.level = level;
this.range = range;
/**
* @member {string} Unique ID (within the page) for this comment, intended to be used to
* find this comment in other revisions of the same page
*/
this.id = null;
/**
* @member {CommentItem[]} Replies to this thread item
*/
this.replies = [];
this.rootNode = null;
}
OO.initClass( ThreadItem );
/**
* Get the list of authors in the comment tree below this thread item.
*
* Usually called on a HeadingItem to find all authors in a thread.
*
* @return {string[]} Author usernames
*/
ThreadItem.prototype.getAuthorsBelow = function () {
var authors = {};
function getAuthorSet( comment ) {
authors[ comment.author ] = true;
// Get the set of authors in the same format from each reply
comment.replies.map( getAuthorSet );
}
this.replies.map( getAuthorSet );
return Object.keys( authors ).sort();
};
/**
* Get the name of the page from which this thread item is transcluded (if any).
*
* @return {string|boolean} `false` if this item is not transcluded. A string if it's transcluded
* from a single page (the page title, in text form with spaces). `true` if it's transcluded, but
* we can't determine the source.
*/
ThreadItem.prototype.getTranscludedFrom = function () {
var coveredNodes, i, node, dataMw;
// If some template is used within the comment (e.g. {{ping|…}} or {{tl|…}}, or a
// non-substituted signature template), that *does not* mean the comment is transcluded.
// We only want to consider comments to be transcluded if all wrapper elements (usually
// <li> or <p>) are marked as part of a single transclusion.
// If we can't find "exact" wrappers, using only the end container works out well
// (because the main purpose of this method is to decide on which page we should post
// replies to the given comment, and they'll go after the comment).
coveredNodes = utils.getFullyCoveredSiblings( this ) ||
[ this.range.endContainer ];
node = utils.getTranscludedFromElement( coveredNodes[ 0 ] );
for ( i = 1; i < coveredNodes.length; i++ ) {
if ( node !== utils.getTranscludedFromElement( coveredNodes[ i ] ) ) {
// Comment is only partially transcluded, that should be fine
return false;
}
}
if ( !node ) {
// No mw:Transclusion node found, this item is not transcluded
return false;
}
dataMw = JSON.parse( node.getAttribute( 'data-mw' ) );
// Only return a page name if this is a simple single-template transclusion.
if (
dataMw &&
dataMw.parts &&
dataMw.parts.length === 1 &&
dataMw.parts[ 0 ].template &&
dataMw.parts[ 0 ].template.target.href
) {
// Slice off the './' prefix and convert to text form (underscores to spaces, URL-decoded)
return mw.libs.ve.normalizeParsoidResourceName( dataMw.parts[ 0 ].template.target.href );
}
// Multi-template transclusion, or a parser function call, or template-affected wikitext outside
// of a template call, or a mix of the above
return true;
};
/**
* Return a native Range object corresponding to the item's range.
*
* @return {Range}
*/
ThreadItem.prototype.getNativeRange = function () {
var endContainer, endOffset,
doc = this.range.startContainer.ownerDocument,
nativeRange = doc.createRange();
nativeRange.setStart( this.range.startContainer, this.range.startOffset );
// HACK: When the offset is outside the container, assume this is because of
// the 'mw:Entity' hack in parser#findTimestamp and adjust accordingly.
// TODO: The parser should produce valid ranges!
endContainer = this.range.endContainer;
endOffset = this.range.endOffset;
while ( endOffset > ( endContainer.length || endContainer.childNodes.length ) ) {
endOffset -= ( endContainer.length || endContainer.childNodes.length );
endContainer = endContainer.nextSibling;
}
nativeRange.setEnd( endContainer, endOffset );
return nativeRange;
};
module.exports = ThreadItem;