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https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
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318 lines
11 KiB
JavaScript
318 lines
11 KiB
JavaScript
/*!
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* VisualEditor UserInterface IndentationAction class.
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*
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* @copyright 2011-2013 VisualEditor Team and others; see AUTHORS.txt
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* @license The MIT License (MIT); see LICENSE.txt
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*/
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/**
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* Indentation action.
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*
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* @class
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* @extends ve.ui.Action
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* @constructor
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* @param {ve.ui.Surface} surface Surface to act on
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*/
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ve.ui.IndentationAction = function VeUiIndentationAction( surface ) {
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// Parent constructor
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ve.ui.Action.call( this, surface );
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};
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/* Inheritance */
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OO.inheritClass( ve.ui.IndentationAction, ve.ui.Action );
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/* Static Properties */
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ve.ui.IndentationAction.static.name = 'indentation';
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/**
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* List of allowed methods for the action.
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*
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* @static
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* @property
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*/
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ve.ui.IndentationAction.static.methods = [ 'increase', 'decrease' ];
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/* Methods */
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/**
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* Indent content.
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*
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* TODO: Refactor functionality into {ve.dm.SurfaceFragment}.
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*
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* @method
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* @returns {boolean} Indentation increase occured
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*/
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ve.ui.IndentationAction.prototype.increase = function () {
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var i, group,
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fragments = [],
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increased = false,
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surfaceModel = this.surface.getModel(),
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documentModel = surfaceModel.getDocument(),
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selected = surfaceModel.getFragment(),
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groups = documentModel.getCoveredSiblingGroups( selected.getRange() );
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// Build fragments from groups (we need their ranges since the nodes will be rebuilt on change)
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for ( i = 0; i < groups.length; i++ ) {
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group = groups[i];
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if ( group.grandparent && group.grandparent.getType() === 'list' ) {
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fragments.push( surfaceModel.getFragment( group.parent.getRange(), true ) );
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increased = true;
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}
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}
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// Process each fragment (their ranges are automatically adjusted on change)
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for ( i = 0; i < fragments.length; i++ ) {
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this.indentListItem(
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documentModel.getNodeFromOffset( fragments[i].getRange().start )
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);
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}
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selected.select();
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return increased;
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};
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/**
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* Unindent content.
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*
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* TODO: Refactor functionality into {ve.dm.SurfaceFragment}.
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*
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* @method
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* @returns {boolean} Indentation decrease occured
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*/
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ve.ui.IndentationAction.prototype.decrease = function () {
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var i, group,
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fragments = [],
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decreased = false,
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surfaceModel = this.surface.getModel(),
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documentModel = surfaceModel.getDocument(),
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selected = surfaceModel.getFragment(),
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groups = documentModel.getCoveredSiblingGroups( selected.getRange() );
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// Build fragments from groups (we need their ranges since the nodes will be rebuilt on change)
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for ( i = 0; i < groups.length; i++ ) {
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group = groups[i];
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if ( group.grandparent && group.grandparent.getType() === 'list' ) {
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fragments.push( surfaceModel.getFragment( group.parent.getRange(), true ) );
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decreased = true;
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}
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}
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// Process each fragment (their ranges are automatically adjusted on change)
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for ( i = 0; i < fragments.length; i++ ) {
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this.unindentListItem(
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documentModel.getNodeFromOffset( fragments[i].getRange().start )
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);
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}
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selected.select();
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return decreased;
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};
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/**
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* Indent a list item.
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*
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* TODO: Refactor functionality into {ve.dm.SurfaceFragment}.
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*
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* @method
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* @param {ve.dm.ListItemNode} listItem List item to indent
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* @throws {Error} listItem must be a ve.dm.ListItemNode
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*/
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ve.ui.IndentationAction.prototype.indentListItem = function ( listItem ) {
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if ( !( listItem instanceof ve.dm.ListItemNode ) ) {
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throw new Error( 'listItem must be a ve.dm.ListItemNode' );
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}
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/*
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* Indenting a list item is done as follows:
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*
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* 1. Wrap the listItem in a list and a listItem (<li> --> <li><ul><li>)
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* 2. Merge this wrapped listItem into the previous listItem if present
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* (<li>Previous</li><li><ul><li>This --> <li>Previous<ul><li>This)
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* 3. If this results in the wrapped list being preceded by another list,
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* merge those lists.
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*/
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var tx,
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surfaceModel = this.surface.getModel(),
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documentModel = surfaceModel.getDocument(),
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selection = surfaceModel.getSelection(),
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listType = listItem.getParent().getAttribute( 'style' ),
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listItemRange = listItem.getOuterRange(),
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innerListItemRange,
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outerListItemRange,
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mergeStart,
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mergeEnd;
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// CAREFUL: after initializing the variables above, we cannot use the model tree!
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// The first transaction will cause rebuilds so the nodes we have references to now
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// will be detached and useless after the first transaction. Instead, inspect
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// documentModel.data to find out things about the current structure.
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// (1) Wrap the listItem in a list and a listItem
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tx = ve.dm.Transaction.newFromWrap( documentModel,
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listItemRange,
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[],
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[ { 'type': 'listItem' }, { 'type': 'list', 'attributes': { 'style': listType } } ],
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[],
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[]
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);
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surfaceModel.change( tx );
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selection = tx.translateRange( selection );
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// tx.translateRange( innerListItemRange ) doesn't do what we want
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innerListItemRange = ve.Range.newFromTranslatedRange( listItemRange, 2 );
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outerListItemRange = new ve.Range( listItemRange.start, listItemRange.end + 2 );
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// (2) Merge the listItem into the previous listItem (if there is one)
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if (
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documentModel.data.getData( listItemRange.start ).type === 'listItem' &&
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documentModel.data.getData( listItemRange.start - 1 ).type === '/listItem'
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) {
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mergeStart = listItemRange.start - 1;
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mergeEnd = listItemRange.start + 1;
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// (3) If this results in adjacent lists, merge those too
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if (
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documentModel.data.getData( mergeEnd ).type === 'list' &&
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documentModel.data.getData( mergeStart - 1 ).type === '/list'
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) {
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mergeStart--;
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mergeEnd++;
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}
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tx = ve.dm.Transaction.newFromRemoval( documentModel, new ve.Range( mergeStart, mergeEnd ) );
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surfaceModel.change( tx );
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selection = tx.translateRange( selection );
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innerListItemRange = tx.translateRange( innerListItemRange );
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outerListItemRange = tx.translateRange( outerListItemRange );
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}
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// TODO If this listItem has a child list, split&unwrap it
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surfaceModel.setSelection( selection );
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};
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/**
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* Unindent a list item.
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*
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* TODO: Refactor functionality into {ve.dm.SurfaceFragment}.
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*
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* @method
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* @param {ve.dm.ListItemNode} listItem List item to unindent
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* @throws {Error} listItem must be a ve.dm.ListItemNode
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*/
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ve.ui.IndentationAction.prototype.unindentListItem = function ( listItem ) {
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if ( !( listItem instanceof ve.dm.ListItemNode ) ) {
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throw new Error( 'listItem must be a ve.dm.ListItemNode' );
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}
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/*
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* Outdenting a list item is done as follows:
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* 1. Split the parent list to isolate the listItem in its own list
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* 1a. Split the list before the listItem if it's not the first child
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* 1b. Split the list after the listItem if it's not the last child
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* 2. If this isolated list's parent is not a listItem, unwrap the listItem and the isolated list, and stop.
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* 3. Split the parent listItem to isolate the list in its own listItem
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* 3a. Split the listItem before the list if it's not the first child
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* 3b. Split the listItem after the list if it's not the last child
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* 4. Unwrap the now-isolated listItem and the isolated list
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*/
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// TODO: Child list handling, gotta figure that out.
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var tx, i, length, children, child, splitListRange,
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surfaceModel = this.surface.getModel(),
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fragment = surfaceModel.getFragment( listItem.getOuterRange(), true ),
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documentModel = surfaceModel.getDocument(),
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list = listItem.getParent(),
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listElement = list.getClonedElement(),
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grandParentType = list.getParent().getType(),
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listItemRange = listItem.getOuterRange();
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// CAREFUL: after initializing the variables above, we cannot use the model tree!
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// The first transaction will cause rebuilds so the nodes we have references to now
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// will be detached and useless after the first transaction. Instead, inspect
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// documentModel.data to find out things about the current structure.
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// (1) Split the listItem into a separate list
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if ( documentModel.data.getData( listItemRange.start - 1 ).type !== 'list' ) {
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// (1a) listItem is not the first child, split the list before listItem
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tx = ve.dm.Transaction.newFromInsertion( documentModel, listItemRange.start,
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[ { 'type': '/list' }, listElement ]
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);
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surfaceModel.change( tx );
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// tx.translateRange( listItemRange ) doesn't do what we want
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listItemRange = ve.Range.newFromTranslatedRange( listItemRange, 2 );
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}
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if ( documentModel.data.getData( listItemRange.end ).type !== '/list' ) {
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// (1b) listItem is not the last child, split the list after listItem
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tx = ve.dm.Transaction.newFromInsertion( documentModel, listItemRange.end,
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[ { 'type': '/list' }, listElement ]
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);
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surfaceModel.change( tx );
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// listItemRange is not affected by this transaction
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}
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splitListRange = new ve.Range( listItemRange.start - 1, listItemRange.end + 1 );
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if ( grandParentType !== 'listItem' ) {
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// The user is trying to unindent a list item that's not nested
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// (2) Unwrap both the list and the listItem, dumping the listItem's contents
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// into the list's parent
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tx = ve.dm.Transaction.newFromWrap( documentModel,
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new ve.Range( listItemRange.start + 1, listItemRange.end - 1 ),
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[ { 'type': 'list' }, { 'type': 'listItem' } ],
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[],
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[],
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[]
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);
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surfaceModel.change( tx );
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// ensure paragraphs are not wrapper paragraphs now
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// that they are not in a list
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children = fragment.getSiblingNodes();
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for ( i = 0, length = children.length; i < length; i++ ) {
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child = children[i].node;
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if (
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child.type === 'paragraph' &&
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child.element.internal &&
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child.element.internal.generated === 'wrapper'
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) {
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delete child.element.internal.generated;
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if ( ve.isEmptyObject( child.element.internal ) ) {
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delete child.element.internal;
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}
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}
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}
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} else {
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// (3) Split the list away from parentListItem into its own listItem
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// TODO factor common split logic somehow?
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if ( documentModel.data.getData( splitListRange.start - 1 ).type !== 'listItem' ) {
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// (3a) Split parentListItem before list
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tx = ve.dm.Transaction.newFromInsertion( documentModel, splitListRange.start,
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[ { 'type': '/listItem' }, { 'type': 'listItem' } ]
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);
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surfaceModel.change( tx );
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// tx.translateRange( splitListRange ) doesn't do what we want
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splitListRange = ve.Range.newFromTranslatedRange( splitListRange, 2 );
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}
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if ( documentModel.data.getData( splitListRange.end ).type !== '/listItem' ) {
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// (3b) Split parentListItem after list
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tx = ve.dm.Transaction.newFromInsertion( documentModel, splitListRange.end,
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[ { 'type': '/listItem' }, { 'type': 'listItem' } ]
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);
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surfaceModel.change( tx );
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// splitListRange is not affected by this transaction
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}
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// (4) Unwrap the list and its containing listItem
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tx = ve.dm.Transaction.newFromWrap( documentModel,
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new ve.Range( splitListRange.start + 1, splitListRange.end - 1 ),
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[ { 'type': 'listItem' }, { 'type': 'list' } ],
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[],
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[],
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[]
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);
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surfaceModel.change( tx );
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}
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};
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/* Registration */
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ve.ui.actionFactory.register( ve.ui.IndentationAction );
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