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* VisualEditor ContentEditable BranchNode class.
*
* @copyright See AUTHORS.txt
*/
/**
* ContentEditable branch node.
*
* Branch nodes can have branch or leaf nodes as children.
*
* @class
* @abstract
* @extends ve.ce.Node
* @mixes ve.BranchNode
* @constructor
* @param {ve.dm.BranchNode} model Model to observe
* @param {Object} [config] Configuration options
*/
ve.ce.BranchNode = function VeCeBranchNode( model ) {
// Mixin constructor
ve.BranchNode.call( this );
// Parent constructor
ve.ce.BranchNode.super.apply( this, arguments );
// Properties
this.tagName = this.$element.get( 0 ).nodeName.toLowerCase();
this.slugNodes = [];
// Events
this.model.connect( this, { splice: 'onSplice' } );
// Initialization
this.onSplice( 0, 0, ...model.getChildren() );
};
/* Inheritance */
OO.inheritClass( ve.ce.BranchNode, ve.ce.Node );
OO.mixinClass( ve.ce.BranchNode, ve.BranchNode );
/* Static Properties */
/**
* Inline slug template.
*
* @static
* @property {HTMLElement}
*/
ve.ce.BranchNode.inlineSlugTemplate = ( function () {
const profile = $.client.profile();
const layout = profile.layout;
const $img = $( '<img>' )
.attr( {
role: 'none',
alt: ''
} )
.addClass( 've-ce-chimera' );
Eif ( layout === 'webkit' || layout === 'gecko' ) {
// The following classes are used here:
// * ve-ce-chimera-gecko
// * ve-ce-chimera-webkit
$img.addClass( 've-ce-chimera-' + layout );
}
const $span = $( '<span>' )
.addClass( 've-ce-branchNode-slug ve-ce-branchNode-inlineSlug' )
.append( $img );
// Support: Firefox <69
// Firefox <=37 misbehaves if we don't set an src: https://bugzilla.mozilla.org/show_bug.cgi?id=989012
// Firefox <69 misbehaves if we don't set an src and there is no sizing at node creation time: https://bugzilla.mozilla.org/show_bug.cgi?id=1267906
// Setting an src in Chrome is slow, so only set it in affected versions of Firefox
Iif ( layout === 'gecko' && profile.versionNumber < 69 ) {
$img.prop( 'src', ve.ce.minImgDataUri );
}
return $span.get( 0 );
}() );
/**
* Inline slug template for input debugging.
*
* @static
* @property {HTMLElement}
*/
ve.ce.BranchNode.inputDebugInlineSlugTemplate = $( '<span>' )
.addClass( 've-ce-branchNode-slug ve-ce-branchNode-inlineSlug' )
.append(
$( '<img>' )
.addClass( 've-ce-chimera ve-ce-chimera-debug' )
.attr( {
src: ve.ce.chimeraImgDataUri,
role: 'none',
alt: ''
} )
)
.get( 0 );
/**
* Block slug template.
*
* @static
* @property {HTMLElement}
*/
ve.ce.BranchNode.blockSlugTemplate = $( '<div>' )
.addClass( 've-ce-branchNode-slug ve-ce-branchNode-blockSlug' )
.get( 0 );
/* Methods */
/**
* @inheritdoc
*/
ve.ce.BranchNode.prototype.initialize = function () {
// Parent method
ve.ce.BranchNode.super.prototype.initialize.call( this );
this.$element.addClass( 've-ce-branchNode' );
};
/**
* Update the DOM wrapper.
*
* WARNING: The contents, .data( 'view' ), the contentEditable property and any classes the wrapper
* already has will be moved to the new wrapper, but other attributes and any other information
* added using $.data() will be lost upon updating the wrapper. To retain information added to the
* wrapper, subscribe to the 'teardown' and 'setup' events, or override #initialize.
*
* @fires ve.ce.View#teardown
* @fires ve.ce.View#setup
*/
ve.ce.BranchNode.prototype.updateTagName = function () {
const tagName = this.getTagName();
if ( tagName !== this.tagName ) {
this.emit( 'teardown' );
const wrapper = document.createElement( tagName );
// Copy classes
// eslint-disable-next-line mediawiki/class-doc
wrapper.className = this.$element[ 0 ].className;
// Copy contentEditable
wrapper.contentEditable = this.$element[ 0 ].contentEditable;
// Insert new node, then move contents, then remove old node
// This lets ve.ce.Surface#afterMutations see that this is a move
if ( this.$element[ 0 ].parentNode ) {
this.$element[ 0 ].parentNode.insertBefore( wrapper, this.$element[ 0 ] );
}
while ( this.$element[ 0 ].firstChild ) {
wrapper.appendChild( this.$element[ 0 ].firstChild );
}
if ( this.$element[ 0 ].parentNode ) {
this.$element[ 0 ].parentNode.removeChild( this.$element[ 0 ] );
}
// Use new element from now on
this.$element = $( wrapper );
// Remember which tag name we are using now
this.tagName = tagName;
// Give subclasses the opportunity to touch the new element
this.initialize();
this.emit( 'setup' );
// TODO fix the use of ve.ce.DocumentNode and getSurface
if ( this.root instanceof ve.ce.DocumentNode ) {
this.root.getSurface().setContentBranchNodeChanged();
}
}
};
/**
* Handles model update events.
*
* @param {ve.dm.Transaction} transaction
*/
ve.ce.BranchNode.prototype.onModelUpdate = function ( transaction ) {
this.emit( 'childUpdate', transaction );
};
/**
* Handle splice events.
*
* ve.ce.Node objects are generated from the inserted ve.dm.Node objects, producing a view that's a
* mirror of its model.
*
* @param {number} index Index to remove and or insert nodes at
* @param {number} deleteCount Number of nodes to remove
* @param {...ve.dm.BranchNode} [modelNodes] Variadic list of nodes to insert
*/
ve.ce.BranchNode.prototype.onSplice = function ( index, deleteCount, ...modelNodes ) {
// attachedRoot and doc can be undefined in tests
const dmDoc = this.getModel().getDocument(),
attachedRoot = dmDoc && dmDoc.attachedRoot,
isAllAttached = !attachedRoot || attachedRoot instanceof ve.dm.DocumentNode;
let inAttachedRoot, upstreamOfAttachedRoot;
if ( !isAllAttached ) {
// Optimization: Skip traversal when whole doc is attached
inAttachedRoot = this.getModel().isDownstreamOf( attachedRoot );
upstreamOfAttachedRoot = attachedRoot.collectUpstream();
}
// Convert models to views and attach them to this node
const viewNodes = modelNodes.map( ( model ) => {
let view;
if (
isAllAttached || inAttachedRoot || upstreamOfAttachedRoot.indexOf( model ) !== -1 ||
// HACK: An internal item node was requested directly, e.g. for preview (T228070)
// TODO: Come up with a more explict way to skip the UnrenderedNode optimisation.
model.findParent( ve.dm.InternalItemNode )
) {
view = ve.ce.nodeFactory.createFromModel( model );
view.model.connect( this, { update: 'onModelUpdate' } );
} else {
view = new ve.ce.UnrenderedNode( model );
}
return view;
} );
const removals = this.children.splice( index, deleteCount, ...viewNodes );
removals.forEach( ( view ) => {
view.model.disconnect( this, { update: 'onModelUpdate' } );
// Stop child listening to its model (e.g. for splice event)
view.model.disconnect( view );
view.setLive( false );
view.detach();
view.$element.detach();
// And fare thee weel a while
view.destroy();
} );
if ( viewNodes.length ) {
const fragment = document.createDocumentFragment();
for ( let i = viewNodes.length - 1; i >= 0; i-- ) {
viewNodes[ i ].attach( this );
for ( let j = viewNodes[ i ].$element.length - 1; j >= 0; j-- ) {
fragment.insertBefore( viewNodes[ i ].$element[ j ], fragment.childNodes[ 0 ] || null );
}
}
if ( fragment.childNodes.length ) {
// Only calculate this if it's needed, this function looks expensive
const position = this.getDomPosition( index );
position.node.insertBefore(
fragment,
position.node.children[ position.offset ] || null
);
}
for ( let i = viewNodes.length - 1; i >= 0; i-- ) {
if ( this.live !== viewNodes[ i ].isLive() ) {
viewNodes[ i ].setLive( this.live );
}
}
}
// TODO: restructure to clarify the logic (exactly one of these is a no-op)
this.setupBlockSlugs();
this.setupInlineSlugs();
};
/**
* Setup block slugs
*/
ve.ce.BranchNode.prototype.setupBlockSlugs = function () {
// Only proceed if we are in a non-content node
if ( this.canHaveChildrenNotContent() ) {
this.setupSlugs( true );
}
};
/**
* Setup inline slugs
*/
ve.ce.BranchNode.prototype.setupInlineSlugs = function () {
// Only proceed if we are in a content node
if ( !this.canHaveChildrenNotContent() ) {
this.setupSlugs( false );
}
};
/**
* Remove all slugs in this branch
*/
ve.ce.BranchNode.prototype.removeSlugs = function () {
// Remove all slugs in this branch
for ( const i in this.slugNodes ) {
if ( this.slugNodes[ i ] !== undefined && this.slugNodes[ i ].parentNode ) {
this.slugNodes[ i ].parentNode.removeChild( this.slugNodes[ i ] );
}
delete this.slugNodes[ i ];
}
};
/**
* Setup slugs where needed.
*
* Existing slugs will be removed before new ones are added.
*
* @param {boolean} isBlock Set up block slugs, otherwise setup inline slugs
*/
ve.ce.BranchNode.prototype.setupSlugs = function ( isBlock ) {
// Source mode optimization
Iif ( this.getModel().getDocument() && this.getModel().getDocument().sourceMode && isBlock ) {
return;
}
const doc = this.getElementDocument();
this.removeSlugs();
let slugTemplate;
if ( isBlock ) {
slugTemplate = ve.ce.BranchNode.blockSlugTemplate;
} else Iif ( ve.inputDebug ) {
slugTemplate = ve.ce.BranchNode.inputDebugInlineSlugTemplate;
} else {
slugTemplate = ve.ce.BranchNode.inlineSlugTemplate;
}
for ( const i in this.getModel().slugPositions ) {
const slugNode = doc.importNode( slugTemplate, true );
// FIXME T126019: InternalListNode has an empty $element, so we assume that the slug goes
// at the end instead. This is a hack and the internal list needs to die in a fire.
if ( this.children[ i ] && this.children[ i ].$element[ 0 ] ) {
const child = this.children[ i ].$element[ 0 ];
// child.parentNode might not be equal to this.$element[ 0 ]: e.g. annotated inline nodes
child.parentNode.insertBefore( slugNode, child );
} else {
this.$element[ 0 ].appendChild( slugNode );
}
this.slugNodes[ i ] = slugNode;
if ( isBlock ) {
const slugButton = new ve.ui.NoFocusButtonWidget( {
tabIndex: -1,
label: ve.msg( 'visualeditor-slug-insert' ),
icon: 'add',
framed: false
} ).on( 'click', this.onSlugClick.bind( this, slugNode ) );
$( slugNode ).append( slugButton.$element );
}
}
};
/**
* Handle slug click events
*
* @param {HTMLElement} slugNode Slug node clicked
*/
ve.ce.BranchNode.prototype.onSlugClick = function ( slugNode ) {
this.getRoot().getSurface().createSlug( slugNode );
};
/**
* Get a slug at an offset.
*
* @param {number} offset Offset to get slug at
* @return {HTMLElement|null}
*/
ve.ce.BranchNode.prototype.getSlugAtOffset = function ( offset ) {
let startOffset = this.model.getOffset() + ( this.isWrapped() ? 1 : 0 );
if ( offset === startOffset ) {
return this.slugNodes[ 0 ] || null;
}
for ( let i = 0; i < this.children.length; i++ ) {
startOffset += this.children[ i ].model.getOuterLength();
if ( offset === startOffset ) {
return this.slugNodes[ i + 1 ] || null;
}
}
return null;
};
/**
* Set live state on child nodes.
*
* @param {boolean} live New live state
*/
ve.ce.BranchNode.prototype.setLive = function ( live ) {
// Parent method
ve.ce.BranchNode.super.prototype.setLive.apply( this, arguments );
for ( let i = 0; i < this.children.length; i++ ) {
this.children[ i ].setLive( live );
}
};
/**
* Release all memory.
*/
ve.ce.BranchNode.prototype.destroy = function () {
for ( let i = 0, len = this.children.length; i < len; i++ ) {
this.children[ i ].destroy();
}
// Parent method
ve.ce.BranchNode.super.prototype.destroy.call( this );
};
/**
* @inheritdoc
*/
ve.ce.BranchNode.prototype.detach = function () {
for ( let i = 0, len = this.children.length; i < len; i++ ) {
this.children[ i ].detach();
}
// Parent method
ve.ce.BranchNode.super.prototype.detach.call( this );
};
/**
* Get the DOM position (node and offset) corresponding to a position in this node
*
* The node/offset have the same semantics as a DOM Selection focusNode/focusOffset
*
* @param {number} offset The offset inside this node of the required position
* @return {ve.ce.NodeAndOffset} The DOM position; guaranteed to be this node's final DOM node
*/
ve.ce.BranchNode.prototype.getDomPosition = function ( offset ) {
const domNode = this.$element.last()[ 0 ];
// Step backwards past empty nodes
let ceNode;
let i = offset - 1;
while ( true ) {
ceNode = this.children[ i-- ];
if ( !ceNode ) {
// No preceding children with DOM nodes
return { node: domNode, offset: 0 };
}
if ( ceNode.$element && ceNode.$element.length > 0 ) {
// Preceding child with a DOM node
return {
node: domNode,
offset: Array.prototype.indexOf.call(
domNode.childNodes,
ceNode.$element.last()[ 0 ]
) + 1
};
}
if ( ceNode.getType() === 'text' ) {
break;
}
}
// Darn, we hit a text node. CE text nodes can contain varying annotations and so it is
// difficult to calculate how many childNodes to skip. Let's try stepping forward instead.
i = offset;
while ( true ) {
ceNode = this.children[ i++ ];
if ( !ceNode ) {
// No following children with DOM nodes
return { node: domNode, offset: domNode.childNodes.length };
}
Eif ( ceNode.$element && ceNode.$element.length > 0 ) {
// Following child with a DOM node
return {
node: domNode,
offset: Array.prototype.indexOf.call(
domNode.childNodes,
ceNode.$element.first()[ 0 ]
)
};
}
if ( ceNode.getType() === 'text' ) {
break;
}
}
// Oh no, there's a text node in both directions
throw new Error( 'Cannot calculate DOM position: adjacent text nodes' );
};
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