mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
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317 lines
8.9 KiB
JavaScript
317 lines
8.9 KiB
JavaScript
/*!
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* VisualEditor ContentEditable ResizableNode 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 resizable node.
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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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* @param {jQuery} [$resizable=this.$] Resizable DOM element
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* @param {Object} [config] Configuration options
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* @param {number|null} [config.snapToGrid=10] Snap to a grid of size X when the shift key is held. Null disables.
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*/
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ve.ce.ResizableNode = function VeCeResizableNode( $resizable, config ) {
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// Properties
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this.$resizable = $resizable || this.$;
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this.ratio = this.model.getAttribute( 'width' ) / this.model.getAttribute( 'height' );
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this.resizing = false;
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this.$resizeHandles = this.$$( '<div>' );
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this.snapToGrid = ( config && config.snapToGrid !== undefined ) ? config.snapToGrid : 10;
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// Events
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this.connect( this, {
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'focus': 'onResizableFocus',
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'blur': 'onResizableBlur',
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'live': 'onResizableLive',
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'resize': 'onResizableFocus'
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} );
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// Initialization
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this.$resizeHandles
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.addClass( 've-ce-resizableNode-handles' )
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.append( this.$$( '<div>' ).addClass( 've-ce-resizableNode-nwHandle' ) )
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.append( this.$$( '<div>' ).addClass( 've-ce-resizableNode-neHandle' ) )
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.append( this.$$( '<div>' ).addClass( 've-ce-resizableNode-seHandle' ) )
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.append( this.$$( '<div>' ).addClass( 've-ce-resizableNode-swHandle' ) );
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};
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/* Static Properties */
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ve.ce.ResizableNode.static = {};
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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.ResizableNode.prototype.onResizableFocus = function () {
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this.$resizeHandles.appendTo( this.root.getSurface().getSurface().$localOverlayControls );
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this.setResizableHandlesSizeAndPosition();
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this.$resizeHandles
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.find( '.ve-ce-resizableNode-neHandle' )
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.css( { 'margin-right': -this.$resizable.width() } )
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.end()
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.find( '.ve-ce-resizableNode-swHandle' )
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.css( { 'margin-bottom': -this.$resizable.height() } )
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.end()
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.find( '.ve-ce-resizableNode-seHandle' )
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.css( {
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'margin-right': -this.$resizable.width(),
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'margin-bottom': -this.$resizable.height()
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} );
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this.$resizeHandles.children()
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.off( '.ve-ui-resizableNode' )
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.on(
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'mousedown.ve-ui-resizableNode',
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ve.bind( this.onResizeHandlesCornerMouseDown, this )
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);
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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.ResizableNode.prototype.onResizableBlur = function () {
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this.$resizeHandles.detach();
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};
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/**
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* Handle live event.
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*
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* @method
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*/
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ve.ce.ResizableNode.prototype.onResizableLive = function () {
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var surfaceModel = this.getRoot().getSurface().getModel();
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if ( this.live ) {
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surfaceModel.connect( this, { 'history': 'setResizableHandlesSizeAndPosition' } );
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} else {
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surfaceModel.disconnect( this, { 'history': 'setResizableHandlesSizeAndPosition' } );
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this.onResizableBlur();
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}
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};
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/**
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* Handle bounding box handle mousedown.
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*
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* @method
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* @param {jQuery.Event} e Click event
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*/
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ve.ce.ResizableNode.prototype.onResizeHandlesCornerMouseDown = function ( e ) {
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// Hide context menu
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// TODO: Maybe there's a more generic way to handle this sort of thing? For relocation it's
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// handled in ve.ce.Surface
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this.root.getSurface().getSurface().getContext().hide();
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// Set bounding box width and undo the handle margins
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this.$resizeHandles
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.addClass( 've-ui-resizableNode-handles-resizing' )
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.css( {
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'width': this.$resizable.width(),
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'height': this.$resizable.height()
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} );
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this.$resizeHandles.children().css( 'margin', 0 );
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// Values to calculate adjusted bounding box size
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this.resizeInfo = {
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'mouseX': e.screenX,
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'mouseY': e.screenY,
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'top': this.$resizeHandles.position().top,
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'left': this.$resizeHandles.position().left,
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'height': this.$resizeHandles.height(),
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'width': this.$resizeHandles.width(),
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'handle': e.target.className
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};
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// Bind resize events
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this.resizing = true;
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$( this.getElementDocument() ).on( {
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'mousemove.ve-ce-resizableNode': ve.bind( this.onDocumentMouseMove, this ),
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'mouseup.ve-ce-resizableNode': ve.bind( this.onDocumentMouseUp, this )
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} );
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return false;
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};
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/**
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* Set the proper size and position for resize handles
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*
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* @method
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*/
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ve.ce.ResizableNode.prototype.setResizableHandlesSizeAndPosition = function () {
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var offset = ve.Element.getRelativePosition(
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this.$resizable, this.getRoot().getSurface().getSurface().$
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);
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this.$resizeHandles
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.css( {
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'width': 0,
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'height': 0,
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'top': offset.top,
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'left': offset.left
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} )
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.find( '.ve-ce-resizableNode-neHandle' )
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.css( { 'margin-right': -this.$resizable.width() } )
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.end()
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.find( '.ve-ce-resizableNode-swHandle' )
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.css( { 'margin-bottom': -this.$resizable.height() } )
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.end()
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.find( '.ve-ce-resizableNode-seHandle' )
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.css( {
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'margin-right': -this.$resizable.width(),
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'margin-bottom': -this.$resizable.height()
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} );
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};
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/**
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* Handle body mousemove.
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*
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* @method
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* @param {jQuery.Event} e Click event
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*/
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ve.ce.ResizableNode.prototype.onDocumentMouseMove = function ( e ) {
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var newWidth, newHeight, newRatio, snapMin, snapMax, snap,
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// TODO: Make these configurable
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min = 1,
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max = 1000,
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diff = {},
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dimensions = {
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'width': 0,
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'height': 0,
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'top': this.resizeInfo.top,
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'left': this.resizeInfo.left
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};
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if ( this.resizing ) {
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// X and Y diff
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switch ( this.resizeInfo.handle ) {
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case 've-ce-resizableNode-seHandle':
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diff.x = e.screenX - this.resizeInfo.mouseX;
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diff.y = e.screenY - this.resizeInfo.mouseY;
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break;
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case 've-ce-resizableNode-nwHandle':
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diff.x = this.resizeInfo.mouseX - e.screenX;
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diff.y = this.resizeInfo.mouseY - e.screenY;
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break;
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case 've-ce-resizableNode-neHandle':
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diff.x = e.screenX - this.resizeInfo.mouseX;
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diff.y = this.resizeInfo.mouseY - e.screenY;
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break;
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case 've-ce-resizableNode-swHandle':
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diff.x = this.resizeInfo.mouseX - e.screenX;
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diff.y = e.screenY - this.resizeInfo.mouseY;
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break;
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}
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// Unconstrained dimensions and ratio
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newWidth = Math.max( Math.min( this.$resizable.width() + diff.x, max ), min );
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newHeight = Math.max( Math.min( this.$resizable.height() + diff.y, max ), min );
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newRatio = newWidth / newHeight;
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// Fix the ratio
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if ( this.ratio > newRatio ) {
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dimensions.width = newWidth;
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dimensions.height = this.$resizable.height() +
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( newWidth - this.$resizable.width() ) / this.ratio;
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} else {
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dimensions.width = this.$resizable.width() +
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( newHeight - this.$resizable.height() ) * this.ratio;
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dimensions.height = newHeight;
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}
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if ( this.snapToGrid && e.shiftKey ) {
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snapMin = Math.ceil( min / this.snapToGrid );
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snapMax = Math.floor( max / this.snapToGrid );
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snap = Math.round( dimensions.width / this.snapToGrid );
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dimensions.width = Math.max( Math.min( snap, snapMax ), snapMin ) * this.snapToGrid;
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dimensions.height = dimensions.width / this.ratio;
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}
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// Fix the position
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switch ( this.resizeInfo.handle ) {
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case 've-ce-resizableNode-neHandle':
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dimensions.top = this.resizeInfo.top +
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( this.resizeInfo.height - dimensions.height );
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break;
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case 've-ce-resizableNode-swHandle':
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dimensions.left = this.resizeInfo.left +
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( this.resizeInfo.width - dimensions.width );
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break;
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case 've-ce-resizableNode-nwHandle':
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dimensions.top = this.resizeInfo.top +
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( this.resizeInfo.height - dimensions.height );
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dimensions.left = this.resizeInfo.left +
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( this.resizeInfo.width - dimensions.width );
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break;
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}
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// Update bounding box
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this.$resizeHandles.css( dimensions );
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}
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};
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/**
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* Handle body mouseup.
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*
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* @method
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*/
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ve.ce.ResizableNode.prototype.onDocumentMouseUp = function () {
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var attrChanges,
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offset = this.model.getOffset(),
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width = this.$resizeHandles.outerWidth(),
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height = this.$resizeHandles.outerHeight(),
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surfaceModel = this.getRoot().getSurface().getModel(),
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documentModel = surfaceModel.getDocument(),
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selection = surfaceModel.getSelection();
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this.$resizeHandles.removeClass( 've-ui-resizableNode-handles-resizing' );
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$( this.getElementDocument() ).off( '.ve-ce-resizableNode' );
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this.resizing = false;
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// Apply changes to the model
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attrChanges = this.getAttributeChanges( width, height );
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if ( !ve.isEmptyObject( attrChanges ) ) {
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surfaceModel.change(
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ve.dm.Transaction.newFromAttributeChanges( documentModel, offset, attrChanges ),
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selection
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);
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}
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// Show the context menu. This usually happens with the redraw, but not if the
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// user doesn't perform a drag
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this.root.getSurface().getSurface().getContext().show();
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this.emit( 'resize' );
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};
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/**
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* Generate an object of attributes changes from the new width and height.
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*
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* @param {number} width New image width
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* @param {number} height New image height
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* @returns {Object} Attribute changes
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*/
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ve.ce.ResizableNode.prototype.getAttributeChanges = function ( width, height ) {
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var attrChanges = {};
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if ( this.model.getAttribute( 'width' ) !== width ) {
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attrChanges.width = width;
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}
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if ( this.model.getAttribute( 'height' ) !== height ) {
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attrChanges.height = height;
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}
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return attrChanges;
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};
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