mediawiki-extensions-Visual.../modules/ve2/dm/ve.dm.Document.js

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/**
* DataModel document.
*
* @class
* @constructor
* @param {Array} data Linear model data to start with
*/
ve.dm.Document = function( data ) {
// Inheritance
ve.dm.DocumentFragment.call( this, data );
};
/* Methods */
/**
* Rebuild one or more nodes from a linear model fragment.
*
* The data provided to this method may contain either one node or multiple sibling nodes, but it
* must be balanced and valid. Data provided to this method also may not contain any content at the
* top level. The tree and offset map are updated during this operation.
*
* Process:
* 1. Nodes between {index} and {index} + {numNodes} in {parent} will be removed
* 2. Data will be retrieved from this.data using {offset} and {newLength}
* 3. A document fragment will be generated from the retrieved data
* 4. The document fragment's offset map will be inserted into this document at {offset}
* 5. The document fragment's nodes will be inserted into {parent} at {index}
*
* Use cases:
* 1. Rebuild old nodes and offset data after a change to the linear model.
* 2. Insert new nodes and offset data after a insertion in the linear model.
*
* @param {ve.dm.Node} parent Parent of the node(s) being rebuilt
* @param {Integer} index Index within parent to rebuild or insert nodes
* - If {numNodes} == 0: Index to insert nodes at
* - If {numNodes} >= 1: Index of first node to rebuild
* @param {Integer} numNodes Total number of nodes to rebuild
* - If {numNodes} == 0: Nothing will be rebuilt, but the node(s) built from data will be
* inserted before {index}. To insert nodes at the end, use number of children in {parent}
* - If {numNodes} == 1: Only the node at {index} will be rebuilt
* - If {numNodes} > 1: The node at {index} and the next {numNodes-1} nodes will be rebuilt
* @param {Integer} offset Linear model offset to rebuild or insert offset map data
* - If {numNodes} == 0: Offset to insert offset map data at
* - If {numNodes} >= 1: Offset to remove old and insert new offset map data at
* @param {Integer} newLength Length of data in linear model to rebuild or insert nodes for
* @returns {ve.dm.Node[]} Array containing the rebuilt/inserted nodes
*/
ve.dm.Document.prototype.rebuildNodes = function( parent, index, numNodes, offset, newLength ) {
// Compute the length of the old nodes (so we can splice their offsets out of the offset map)
var oldLength = 0;
for ( var i = index; i < index + numNodes; i++ ) {
oldLength += parent.children[i].getOuterLength();
}
// Get a slice of the document where it's been changed
var data = this.data.slice( offset, offset + newLength );
// Build document fragment from data
var fragment = new ve.dm.DocumentFragment( data, this );
// Get generated child nodes from the document fragment
var nodes = fragment.getDocumentNode().getChildren();
// Replace nodes in the model tree
ve.batchSplice( parent, index, numNodes, nodes );
// Update offset map
ve.batchSplice( this.offsetMap, offset, oldLength, fragment.getOffsetMap() );
// Return inserted nodes
return nodes;
};
/* Inheritance */
ve.extendClass( ve.dm.Document, ve.dm.DocumentFragment );