mediawiki-extensions-Visual.../modules/es/bases/es.DocumentViewBranchNode.js
2011-11-03 21:48:40 +00:00

243 lines
6.4 KiB
JavaScript

/**
* Creates an es.DocumentViewBranchNode object.
*
* @class
* @abstract
* @constructor
* @extends {es.DocumentViewNode}
* @extends {es.DocumentBranchNode}
* @param model {es.ModelNode} Model to observe
* @param {jQuery} [$element] Element to use as a container
*/
es.DocumentViewBranchNode = function( model, $element, horizontal ) {
// Inheritance
es.DocumentViewNode.call( this, model, $element );
es.DocumentBranchNode.call( this );
// Properties
this.horizontal = horizontal || false;
if ( model ) {
// Append existing model children
var childModels = model.getChildren();
for ( var i = 0; i < childModels.length; i++ ) {
this.onAfterPush( childModels[i] );
}
// Observe and mimic changes on model
this.addListenerMethods( this, {
'afterPush': 'onAfterPush',
'afterUnshift': 'onAfterUnshift',
'afterPop': 'onAfterPop',
'afterShift': 'onAfterShift',
'afterSplice': 'onAfterSplice',
'afterSort': 'onAfterSort',
'afterReverse': 'onAfterReverse'
} );
}
};
/* Methods */
es.DocumentViewBranchNode.prototype.onAfterPush = function( childModel ) {
var childView = childModel.createView();
this.emit( 'beforePush', childView );
childView.attach( this );
childView.on( 'update', this.emitUpdate );
// Update children
this.children.push( childView );
// Update DOM
this.$.append( childView.$ );
this.emit( 'afterPush', childView );
this.emit( 'update' );
};
es.DocumentViewBranchNode.prototype.onAfterUnshift = function( childModel ) {
var childView = childModel.createView();
this.emit( 'beforeUnshift', childView );
childView.attach( this );
childView.on( 'update', this.emitUpdate );
// Update children
this.children.unshift( childView );
// Update DOM
this.$.prepend( childView.$ );
this.emit( 'afterUnshift', childView );
this.emit( 'update' );
};
es.DocumentViewBranchNode.prototype.onAfterPop = function() {
this.emit( 'beforePop' );
// Update children
var childView = this.children.pop();
childView.detach();
childView.removeEventListener( 'update', this.emitUpdate );
// Update DOM
childView.$.detach();
this.emit( 'afterPop' );
this.emit( 'update' );
};
es.DocumentViewBranchNode.prototype.onAfterShift = function() {
this.emit( 'beforeShift' );
// Update children
var childView = this.children.shift();
childView.detach();
childView.removeEventListener( 'update', this.emitUpdate );
// Update DOM
childView.$.detach();
this.emit( 'afterShift' );
this.emit( 'update' );
};
es.DocumentViewBranchNode.prototype.onAfterSplice = function( index, howmany ) {
var args = Array.prototype.slice( arguments, 0 );
this.emit.apply( ['beforeSplice'].concat( args ) );
// Update children
this.splice.apply( this, args );
// Update DOM
this.$.children()
// Removals
.slice( index, index + howmany )
.detach()
.end()
// Insertions
.get( index )
.after( $.map( args.slice( 2 ), function( childView ) {
return childView.$;
} ) );
this.emit.apply( ['afterSplice'].concat( args ) );
this.emit( 'update' );
};
es.DocumentViewBranchNode.prototype.onAfterSort = function() {
this.emit( 'beforeSort' );
var childModels = this.model.getChildren();
for ( var i = 0; i < childModels.length; i++ ) {
for ( var j = 0; j < this.children.length; j++ ) {
if ( this.children[j].getModel() === childModels[i] ) {
var childView = this.children[j];
// Update children
this.children.splice( j, 1 );
this.children.push( childView );
// Update DOM
this.$.append( childView.$ );
}
}
}
this.emit( 'afterSort' );
this.emit( 'update' );
};
es.DocumentViewBranchNode.prototype.onAfterReverse = function() {
this.emit( 'beforeReverse' );
// Update children
this.reverse();
// Update DOM
this.$.children().each( function() {
$(this).prependTo( $(this).parent() );
} );
this.emit( 'afterReverse' );
this.emit( 'update' );
};
/**
* Render content.
*
* @method
*/
es.DocumentViewBranchNode.prototype.renderContent = function() {
for ( var i = 0; i < this.children.length; i++ ) {
this.children[i].renderContent();
}
};
/**
* Draw selection around a given range.
*
* @method
* @param {es.Range} range Range of content to draw selection around
*/
es.DocumentViewBranchNode.prototype.drawSelection = function( range ) {
var nodes = this.selectNodes( range, true );
for ( var i = 0; i < this.children.length; i++ ) {
if ( nodes.length && this.children[i] === nodes[0].node ) {
for ( var j = 0; j < nodes.length; j++ ) {
nodes[j].node.drawSelection( nodes[j].range );
}
i += nodes.length - 1;
} else {
this.children[i].clearSelection();
}
}
};
/**
* Clear selection.
*
* @method
*/
es.DocumentViewBranchNode.prototype.clearSelection = function() {
for ( var i = 0; i < this.children.length; i++ ) {
this.children[i].clearSelection();
}
};
/**
* Gets the nearest offset of a rendered position.
*
* @method
* @param {es.Position} position Position to get offset for
* @returns {Integer} Offset of position
*/
es.DocumentViewBranchNode.prototype.getOffsetFromRenderedPosition = function( position ) {
if ( this.children.length === 0 ) {
return 0;
}
var node = this.children[0];
for ( var i = 1; i < this.children.length; i++ ) {
if ( this.horizontal && this.children[i].$.offset().left > position.left ) {
break;
} else if ( !this.horizontal && this.children[i].$.offset().top > position.top ) {
break;
}
node = this.children[i];
}
return node.getParent().getOffsetFromNode( node, true ) +
node.getOffsetFromRenderedPosition( position ) + 1;
};
/**
* Gets rendered position of offset within content.
*
* @method
* @param {Integer} offset Offset to get position for
* @returns {es.Position} Position of offset
*/
es.DocumentViewBranchNode.prototype.getRenderedPositionFromOffset = function( offset, leftBias ) {
var node = this.getNodeFromOffset( offset, true );
if ( node !== null ) {
return node.getRenderedPositionFromOffset(
offset - this.getOffsetFromNode( node, true ) - 1,
leftBias
);
}
return null;
};
es.DocumentViewBranchNode.prototype.getRenderedLineRangeFromOffset = function( offset ) {
var node = this.getNodeFromOffset( offset, true );
if ( node !== null ) {
var nodeOffset = this.getOffsetFromNode( node, true );
return es.Range.newFromTranslatedRange(
node.getRenderedLineRangeFromOffset( offset - nodeOffset - 1 ),
nodeOffset + 1
);
}
return null;
};
/* Inheritance */
es.extendClass( es.DocumentViewBranchNode, es.DocumentViewNode );
es.extendClass( es.DocumentViewBranchNode, es.DocumentBranchNode );