mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
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e71655304e
HTML5's drag and drop has a ton of benefits and a couple of limitations. To achieve a native drag marker, an image tag helper is used to indicate the size of the relocatable node. Chrome shades the marker gray natively, Firefox is styled to match. Change-Id: I755b698a3d968cc7e6ff125109d68ac83fd8a8a2
118 lines
2.6 KiB
JavaScript
118 lines
2.6 KiB
JavaScript
/*!
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* VisualEditor ContentEditable RelocatableNode 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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* ContentEditable relocatable node.
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*
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* Requires that the node also is Focusable
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*
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* @class
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* @abstract
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*
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* @constructor
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*/
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ve.ce.RelocatableNode = function VeCeRelocatableNode() {
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// Properties
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this.relocatingSurface = null;
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this.$relocatableMarker = $('<img>');
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// Events
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this.connect( this, {
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'focus': 'onRelocatableFocus',
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'blur': 'onRelocatableBlur',
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'resize': 'onRelocatableResize'
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} );
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// Initialization
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this.$relocatableMarker
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.addClass( 've-ce-relocatableNode-marker' )
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.attr( 'src', 'data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' )
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.on( {
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'dragstart': ve.bind( this.onRelocatableDragStart, this ),
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'dragend': ve.bind( this.onRelocatableDragEnd, this )
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} );
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};
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/* Static Properties */
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/* Methods */
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/**
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* Handle node focus.
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*
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* @method
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*/
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ve.ce.RelocatableNode.prototype.onRelocatableFocus = function () {
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this.setRelocatableMarkerSizeAndPosition();
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this.$relocatableMarker.appendTo( this.root.getSurface().getSurface().$localOverlay );
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};
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/**
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* Handle node blur.
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*
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* @method
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*/
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ve.ce.RelocatableNode.prototype.onRelocatableBlur = function () {
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this.$relocatableMarker.detach();
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};
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/**
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* Handle node resize.
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*
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* @method
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*/
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ve.ce.RelocatableNode.prototype.onRelocatableResize = function () {
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this.setRelocatableMarkerSizeAndPosition();
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};
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/**
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* Handle element drag start.
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*
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* @method
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*/
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ve.ce.RelocatableNode.prototype.onRelocatableDragStart = function () {
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// Store a copy of the surface, when dragend occurs the node will be detached
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this.relocatingSurface = this.getRoot().getSurface();
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if ( this.relocatingSurface ) {
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// Allow dragging this node in the surface
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this.relocatingSurface.startRelocation( this );
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}
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this.$relocatableMarker.addClass( 'relocating' );
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setTimeout( ve.bind( function () {
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this.$relocatableMarker.css( { 'top': -10000, 'left': -10000 } );
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}, this ), 0 );
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};
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/**
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* Handle element drag end.
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*
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* @method
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*/
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ve.ce.RelocatableNode.prototype.onRelocatableDragEnd = function () {
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if ( this.relocatingSurface ) {
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this.relocatingSurface.endRelocation();
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this.relocatingSurface = null;
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}
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this.$relocatableMarker.removeClass( 'relocating' );
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};
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/**
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* Set the correct size and position of the relocatable marker.
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*
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* @method
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*/
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ve.ce.RelocatableNode.prototype.setRelocatableMarkerSizeAndPosition = function () {
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this.$relocatableMarker.css( {
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'height': this.$.height(),
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'width': this.$.width(),
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'top': this.$.offset().top,
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'left': this.$.offset().left
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} );
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};
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