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image-edit.js (31958B)

---

 /**
  * The functions necessary for editing images.
  *
  * @since 2.9.0
  * @output wp-admin/js/image-edit.js
  */
 
  /* global ajaxurl, confirm */
 
 (function($) {
 	var __ = wp.i18n.__;
 
 	/**
 	 * Contains all the methods to initialise and control the image editor.
 	 *
 	 * @namespace imageEdit
 	 */
 	var imageEdit = window.imageEdit = {
 	iasapi : {},
 	hold : {},
 	postid : '',
 	_view : false,
 
 	/**
 	 * Handle crop tool clicks.
 	 */
 	handleCropToolClick: function( postid, nonce, cropButton ) {
 		var img = $( '#image-preview-' + postid ),
 			selection = this.iasapi.getSelection();
 
 		// Ensure selection is available, otherwise reset to full image.
 		if ( isNaN( selection.x1 ) ) {
 			this.setCropSelection( postid, { 'x1': 0, 'y1': 0, 'x2': img.innerWidth(), 'y2': img.innerHeight(), 'width': img.innerWidth(), 'height': img.innerHeight() } );
 			selection = this.iasapi.getSelection();
 		}
 
 		// If we don't already have a selection, select the entire image.
 		if ( 0 === selection.x1 && 0 === selection.y1 && 0 === selection.x2 && 0 === selection.y2 ) {
 			this.iasapi.setSelection( 0, 0, img.innerWidth(), img.innerHeight(), true );
 			this.iasapi.setOptions( { show: true } );
 			this.iasapi.update();
 		} else {
 
 			// Otherwise, perform the crop.
 			imageEdit.crop( postid, nonce , cropButton );
 		}
 	},
 
 	/**
 	 * Converts a value to an integer.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} f The float value that should be converted.
 	 *
 	 * @return {number} The integer representation from the float value.
 	 */
 	intval : function(f) {
 		/*
 		 * Bitwise OR operator: one of the obscure ways to truncate floating point figures,
 		 * worth reminding JavaScript doesn't have a distinct "integer" type.
 		 */
 		return f | 0;
 	},
 
 	/**
 	 * Adds the disabled attribute and class to a single form element or a field set.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {jQuery}         el The element that should be modified.
 	 * @param {boolean|number} s  The state for the element. If set to true
 	 *                            the element is disabled,
 	 *                            otherwise the element is enabled.
 	 *                            The function is sometimes called with a 0 or 1
 	 *                            instead of true or false.
 	 *
 	 * @return {void}
 	 */
 	setDisabled : function( el, s ) {
 		/*
 		 * `el` can be a single form element or a fieldset. Before #28864, the disabled state on
 		 * some text fields  was handled targeting $('input', el). Now we need to handle the
 		 * disabled state on buttons too so we can just target `el` regardless if it's a single
 		 * element or a fieldset because when a fieldset is disabled, its descendants are disabled too.
 		 */
 		if ( s ) {
 			el.removeClass( 'disabled' ).prop( 'disabled', false );
 		} else {
 			el.addClass( 'disabled' ).prop( 'disabled', true );
 		}
 	},
 
 	/**
 	 * Initializes the image editor.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid The post ID.
 	 *
 	 * @return {void}
 	 */
 	init : function(postid) {
 		var t = this, old = $('#image-editor-' + t.postid),
 			x = t.intval( $('#imgedit-x-' + postid).val() ),
 			y = t.intval( $('#imgedit-y-' + postid).val() );
 
 		if ( t.postid !== postid && old.length ) {
 			t.close(t.postid);
 		}
 
 		t.hold.w = t.hold.ow = x;
 		t.hold.h = t.hold.oh = y;
 		t.hold.xy_ratio = x / y;
 		t.hold.sizer = parseFloat( $('#imgedit-sizer-' + postid).val() );
 		t.postid = postid;
 		$('#imgedit-response-' + postid).empty();
 
 		$('#imgedit-panel-' + postid).on( 'keypress', 'input[type="text"]', function(e) {
 			var k = e.keyCode;
 
 			// Key codes 37 through 40 are the arrow keys.
 			if ( 36 < k && k < 41 ) {
 				$(this).trigger( 'blur' );
 			}
 
 			// The key code 13 is the Enter key.
 			if ( 13 === k ) {
 				e.preventDefault();
 				e.stopPropagation();
 				return false;
 			}
 		});
 
 		$( document ).on( 'image-editor-ui-ready', this.focusManager );
 	},
 
 	/**
 	 * Toggles the wait/load icon in the editor.
 	 *
 	 * @since 2.9.0
 	 * @since 5.5.0 Added the triggerUIReady parameter.
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number}  postid         The post ID.
 	 * @param {number}  toggle         Is 0 or 1, fades the icon in when 1 and out when 0.
 	 * @param {boolean} triggerUIReady Whether to trigger a custom event when the UI is ready. Default false.
 	 *
 	 * @return {void}
 	 */
 	toggleEditor: function( postid, toggle, triggerUIReady ) {
 		var wait = $('#imgedit-wait-' + postid);
 
 		if ( toggle ) {
 			wait.fadeIn( 'fast' );
 		} else {
 			wait.fadeOut( 'fast', function() {
 				if ( triggerUIReady ) {
 					$( document ).trigger( 'image-editor-ui-ready' );
 				}
 			} );
 		}
 	},
 
 	/**
 	 * Shows or hides the image edit help box.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {HTMLElement} el The element to create the help window in.
 	 *
 	 * @return {boolean} Always returns false.
 	 */
 	toggleHelp : function(el) {
 		var $el = $( el );
 		$el
 			.attr( 'aria-expanded', 'false' === $el.attr( 'aria-expanded' ) ? 'true' : 'false' )
 			.parents( '.imgedit-group-top' ).toggleClass( 'imgedit-help-toggled' ).find( '.imgedit-help' ).slideToggle( 'fast' );
 
 		return false;
 	},
 
 	/**
 	 * Gets the value from the image edit target.
 	 *
 	 * The image edit target contains the image sizes where the (possible) changes
 	 * have to be applied to.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid The post ID.
 	 *
 	 * @return {string} The value from the imagedit-save-target input field when available,
 	 *                  or 'full' when not available.
 	 */
 	getTarget : function(postid) {
 		return $('input[name="imgedit-target-' + postid + '"]:checked', '#imgedit-save-target-' + postid).val() || 'full';
 	},
 
 	/**
 	 * Recalculates the height or width and keeps the original aspect ratio.
 	 *
 	 * If the original image size is exceeded a red exclamation mark is shown.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number}         postid The current post ID.
 	 * @param {number}         x      Is 0 when it applies the y-axis
 	 *                                and 1 when applicable for the x-axis.
 	 * @param {jQuery}         el     Element.
 	 *
 	 * @return {void}
 	 */
 	scaleChanged : function( postid, x, el ) {
 		var w = $('#imgedit-scale-width-' + postid), h = $('#imgedit-scale-height-' + postid),
 		warn = $('#imgedit-scale-warn-' + postid), w1 = '', h1 = '';
 
 		if ( false === this.validateNumeric( el ) ) {
 			return;
 		}
 
 		if ( x ) {
 			h1 = ( w.val() !== '' ) ? Math.round( w.val() / this.hold.xy_ratio ) : '';
 			h.val( h1 );
 		} else {
 			w1 = ( h.val() !== '' ) ? Math.round( h.val() * this.hold.xy_ratio ) : '';
 			w.val( w1 );
 		}
 
 		if ( ( h1 && h1 > this.hold.oh ) || ( w1 && w1 > this.hold.ow ) ) {
 			warn.css('visibility', 'visible');
 		} else {
 			warn.css('visibility', 'hidden');
 		}
 	},
 
 	/**
 	 * Gets the selected aspect ratio.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid The post ID.
 	 *
 	 * @return {string} The aspect ratio.
 	 */
 	getSelRatio : function(postid) {
 		var x = this.hold.w, y = this.hold.h,
 			X = this.intval( $('#imgedit-crop-width-' + postid).val() ),
 			Y = this.intval( $('#imgedit-crop-height-' + postid).val() );
 
 		if ( X && Y ) {
 			return X + ':' + Y;
 		}
 
 		if ( x && y ) {
 			return x + ':' + y;
 		}
 
 		return '1:1';
 	},
 
 	/**
 	 * Removes the last action from the image edit history.
 	 * The history consist of (edit) actions performed on the image.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid  The post ID.
 	 * @param {number} setSize 0 or 1, when 1 the image resets to its original size.
 	 *
 	 * @return {string} JSON string containing the history or an empty string if no history exists.
 	 */
 	filterHistory : function(postid, setSize) {
 		// Apply undo state to history.
 		var history = $('#imgedit-history-' + postid).val(), pop, n, o, i, op = [];
 
 		if ( history !== '' ) {
 			// Read the JSON string with the image edit history.
 			history = JSON.parse(history);
 			pop = this.intval( $('#imgedit-undone-' + postid).val() );
 			if ( pop > 0 ) {
 				while ( pop > 0 ) {
 					history.pop();
 					pop--;
 				}
 			}
 
 			// Reset size to its original state.
 			if ( setSize ) {
 				if ( !history.length ) {
 					this.hold.w = this.hold.ow;
 					this.hold.h = this.hold.oh;
 					return '';
 				}
 
 				// Restore original 'o'.
 				o = history[history.length - 1];
 
 				// c = 'crop', r = 'rotate', f = 'flip'.
 				o = o.c || o.r || o.f || false;
 
 				if ( o ) {
 					// fw = Full image width.
 					this.hold.w = o.fw;
 					// fh = Full image height.
 					this.hold.h = o.fh;
 				}
 			}
 
 			// Filter the last step/action from the history.
 			for ( n in history ) {
 				i = history[n];
 				if ( i.hasOwnProperty('c') ) {
 					op[n] = { 'c': { 'x': i.c.x, 'y': i.c.y, 'w': i.c.w, 'h': i.c.h } };
 				} else if ( i.hasOwnProperty('r') ) {
 					op[n] = { 'r': i.r.r };
 				} else if ( i.hasOwnProperty('f') ) {
 					op[n] = { 'f': i.f.f };
 				}
 			}
 			return JSON.stringify(op);
 		}
 		return '';
 	},
 	/**
 	 * Binds the necessary events to the image.
 	 *
 	 * When the image source is reloaded the image will be reloaded.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number}   postid   The post ID.
 	 * @param {string}   nonce    The nonce to verify the request.
 	 * @param {function} callback Function to execute when the image is loaded.
 	 *
 	 * @return {void}
 	 */
 	refreshEditor : function(postid, nonce, callback) {
 		var t = this, data, img;
 
 		t.toggleEditor(postid, 1);
 		data = {
 			'action': 'imgedit-preview',
 			'_ajax_nonce': nonce,
 			'postid': postid,
 			'history': t.filterHistory(postid, 1),
 			'rand': t.intval(Math.random() * 1000000)
 		};
 
 		img = $( '<img id="image-preview-' + postid + '" alt="" />' )
 			.on( 'load', { history: data.history }, function( event ) {
 				var max1, max2,
 					parent = $( '#imgedit-crop-' + postid ),
 					t = imageEdit,
 					historyObj;
 
 				// Checks if there already is some image-edit history.
 				if ( '' !== event.data.history ) {
 					historyObj = JSON.parse( event.data.history );
 					// If last executed action in history is a crop action.
 					if ( historyObj[historyObj.length - 1].hasOwnProperty( 'c' ) ) {
 						/*
 						 * A crop action has completed and the crop button gets disabled
 						 * ensure the undo button is enabled.
 						 */
 						t.setDisabled( $( '#image-undo-' + postid) , true );
 						// Move focus to the undo button to avoid a focus loss.
 						$( '#image-undo-' + postid ).trigger( 'focus' );
 					}
 				}
 
 				parent.empty().append(img);
 
 				// w, h are the new full size dimensions.
 				max1 = Math.max( t.hold.w, t.hold.h );
 				max2 = Math.max( $(img).width(), $(img).height() );
 				t.hold.sizer = max1 > max2 ? max2 / max1 : 1;
 
 				t.initCrop(postid, img, parent);
 
 				if ( (typeof callback !== 'undefined') && callback !== null ) {
 					callback();
 				}
 
 				if ( $('#imgedit-history-' + postid).val() && $('#imgedit-undone-' + postid).val() === '0' ) {
 					$('input.imgedit-submit-btn', '#imgedit-panel-' + postid).prop('disabled', false);
 				} else {
 					$('input.imgedit-submit-btn', '#imgedit-panel-' + postid).prop('disabled', true);
 				}
 
 				t.toggleEditor(postid, 0);
 			})
 			.on( 'error', function() {
 				var errorMessage = __( 'Could not load the preview image. Please reload the page and try again.' );
 
 				$( '#imgedit-crop-' + postid )
 					.empty()
 					.append( '<div class="notice notice-error" tabindex="-1" role="alert"><p>' + errorMessage + '</p></div>' );
 
 				t.toggleEditor( postid, 0, true );
 				wp.a11y.speak( errorMessage, 'assertive' );
 			} )
 			.attr('src', ajaxurl + '?' + $.param(data));
 	},
 	/**
 	 * Performs an image edit action.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid The post ID.
 	 * @param {string} nonce  The nonce to verify the request.
 	 * @param {string} action The action to perform on the image.
 	 *                        The possible actions are: "scale" and "restore".
 	 *
 	 * @return {boolean|void} Executes a post request that refreshes the page
 	 *                        when the action is performed.
 	 *                        Returns false if a invalid action is given,
 	 *                        or when the action cannot be performed.
 	 */
 	action : function(postid, nonce, action) {
 		var t = this, data, w, h, fw, fh;
 
 		if ( t.notsaved(postid) ) {
 			return false;
 		}
 
 		data = {
 			'action': 'image-editor',
 			'_ajax_nonce': nonce,
 			'postid': postid
 		};
 
 		if ( 'scale' === action ) {
 			w = $('#imgedit-scale-width-' + postid),
 			h = $('#imgedit-scale-height-' + postid),
 			fw = t.intval(w.val()),
 			fh = t.intval(h.val());
 
 			if ( fw < 1 ) {
 				w.trigger( 'focus' );
 				return false;
 			} else if ( fh < 1 ) {
 				h.trigger( 'focus' );
 				return false;
 			}
 
 			if ( fw === t.hold.ow || fh === t.hold.oh ) {
 				return false;
 			}
 
 			data['do'] = 'scale';
 			data.fwidth = fw;
 			data.fheight = fh;
 		} else if ( 'restore' === action ) {
 			data['do'] = 'restore';
 		} else {
 			return false;
 		}
 
 		t.toggleEditor(postid, 1);
 		$.post( ajaxurl, data, function( response ) {
 			$( '#image-editor-' + postid ).empty().append( response.data.html );
 			t.toggleEditor( postid, 0, true );
 			// Refresh the attachment model so that changes propagate.
 			if ( t._view ) {
 				t._view.refresh();
 			}
 		} ).done( function( response ) {
 			// Whether the executed action was `scale` or `restore`, the response does have a message.
 			if ( response && response.data.message.msg ) {
 				wp.a11y.speak( response.data.message.msg );
 				return;
 			}
 
 			if ( response && response.data.message.error ) {
 				wp.a11y.speak( response.data.message.error );
 			}
 		} );
 	},
 
 	/**
 	 * Stores the changes that are made to the image.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number}  postid   The post ID to get the image from the database.
 	 * @param {string}  nonce    The nonce to verify the request.
 	 *
 	 * @return {boolean|void}  If the actions are successfully saved a response message is shown.
 	 *                         Returns false if there is no image editing history,
 	 *                         thus there are not edit-actions performed on the image.
 	 */
 	save : function(postid, nonce) {
 		var data,
 			target = this.getTarget(postid),
 			history = this.filterHistory(postid, 0),
 			self = this;
 
 		if ( '' === history ) {
 			return false;
 		}
 
 		this.toggleEditor(postid, 1);
 		data = {
 			'action': 'image-editor',
 			'_ajax_nonce': nonce,
 			'postid': postid,
 			'history': history,
 			'target': target,
 			'context': $('#image-edit-context').length ? $('#image-edit-context').val() : null,
 			'do': 'save'
 		};
 		// Post the image edit data to the backend.
 		$.post( ajaxurl, data, function( response ) {
 			// If a response is returned, close the editor and show an error.
 			if ( response.data.error ) {
 				$( '#imgedit-response-' + postid )
 					.html( '<div class="notice notice-error" tabindex="-1" role="alert"><p>' + response.data.error + '</p></div>' );
 
 				imageEdit.close(postid);
 				wp.a11y.speak( response.data.error );
 				return;
 			}
 
 			if ( response.data.fw && response.data.fh ) {
 				$( '#media-dims-' + postid ).html( response.data.fw + ' &times; ' + response.data.fh );
 			}
 
 			if ( response.data.thumbnail ) {
 				$( '.thumbnail', '#thumbnail-head-' + postid ).attr( 'src', '' + response.data.thumbnail );
 			}
 
 			if ( response.data.msg ) {
 				$( '#imgedit-response-' + postid )
 					.html( '<div class="notice notice-success" tabindex="-1" role="alert"><p>' + response.data.msg + '</p></div>' );
 
 				wp.a11y.speak( response.data.msg );
 			}
 
 			if ( self._view ) {
 				self._view.save();
 			} else {
 				imageEdit.close(postid);
 			}
 		});
 	},
 
 	/**
 	 * Creates the image edit window.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid   The post ID for the image.
 	 * @param {string} nonce    The nonce to verify the request.
 	 * @param {Object} view     The image editor view to be used for the editing.
 	 *
 	 * @return {void|promise} Either returns void if the button was already activated
 	 *                        or returns an instance of the image editor, wrapped in a promise.
 	 */
 	open : function( postid, nonce, view ) {
 		this._view = view;
 
 		var dfd, data,
 			elem = $( '#image-editor-' + postid ),
 			head = $( '#media-head-' + postid ),
 			btn = $( '#imgedit-open-btn-' + postid ),
 			spin = btn.siblings( '.spinner' );
 
 		/*
 		 * Instead of disabling the button, which causes a focus loss and makes screen
 		 * readers announce "unavailable", return if the button was already clicked.
 		 */
 		if ( btn.hasClass( 'button-activated' ) ) {
 			return;
 		}
 
 		spin.addClass( 'is-active' );
 
 		data = {
 			'action': 'image-editor',
 			'_ajax_nonce': nonce,
 			'postid': postid,
 			'do': 'open'
 		};
 
 		dfd = $.ajax( {
 			url:  ajaxurl,
 			type: 'post',
 			data: data,
 			beforeSend: function() {
 				btn.addClass( 'button-activated' );
 			}
 		} ).done( function( response ) {
 			var errorMessage;
 
 			if ( '-1' === response ) {
 				errorMessage = __( 'Could not load the preview image.' );
 				elem.html( '<div class="notice notice-error" tabindex="-1" role="alert"><p>' + errorMessage + '</p></div>' );
 			}
 
 			if ( response.data && response.data.html ) {
 				elem.html( response.data.html );
 			}
 
 			head.fadeOut( 'fast', function() {
 				elem.fadeIn( 'fast', function() {
 					if ( errorMessage ) {
 						$( document ).trigger( 'image-editor-ui-ready' );
 					}
 				} );
 				btn.removeClass( 'button-activated' );
 				spin.removeClass( 'is-active' );
 			} );
 			// Initialise the Image Editor now that everything is ready.
 			imageEdit.init( postid );
 		} );
 
 		return dfd;
 	},
 
 	/**
 	 * Initializes the cropping tool and sets a default cropping selection.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid The post ID.
 	 *
 	 * @return {void}
 	 */
 	imgLoaded : function(postid) {
 		var img = $('#image-preview-' + postid), parent = $('#imgedit-crop-' + postid);
 
 		// Ensure init has run even when directly loaded.
 		if ( 'undefined' === typeof this.hold.sizer ) {
 			this.init( postid );
 		}
 
 		this.initCrop(postid, img, parent);
 		this.setCropSelection( postid, { 'x1': 0, 'y1': 0, 'x2': 0, 'y2': 0, 'width': img.innerWidth(), 'height': img.innerHeight() } );
 
 		this.toggleEditor( postid, 0, true );
 	},
 
 	/**
 	 * Manages keyboard focus in the Image Editor user interface.
 	 *
 	 * @since 5.5.0
 	 *
 	 * @return {void}
 	 */
 	focusManager: function() {
 		/*
 		 * Editor is ready. Move focus to one of the admin alert notices displayed
 		 * after a user action or to the first focusable element. Since the DOM
 		 * update is pretty large, the timeout helps browsers update their
 		 * accessibility tree to better support assistive technologies.
 		 */
 		setTimeout( function() {
 			var elementToSetFocusTo = $( '.notice[role="alert"]' );
 
 			if ( ! elementToSetFocusTo.length ) {
 				elementToSetFocusTo = $( '.imgedit-wrap' ).find( ':tabbable:first' );
 			}
 
 			elementToSetFocusTo.trigger( 'focus' );
 		}, 100 );
 	},
 
 	/**
 	 * Initializes the cropping tool.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number}      postid The post ID.
 	 * @param {HTMLElement} image  The preview image.
 	 * @param {HTMLElement} parent The preview image container.
 	 *
 	 * @return {void}
 	 */
 	initCrop : function(postid, image, parent) {
 		var t = this,
 			selW = $('#imgedit-sel-width-' + postid),
 			selH = $('#imgedit-sel-height-' + postid),
 			$image = $( image ),
 			$img;
 
 		// Already initialized?
 		if ( $image.data( 'imgAreaSelect' ) ) {
 			return;
 		}
 
 		t.iasapi = $image.imgAreaSelect({
 			parent: parent,
 			instance: true,
 			handles: true,
 			keys: true,
 			minWidth: 3,
 			minHeight: 3,
 
 			/**
 			 * Sets the CSS styles and binds events for locking the aspect ratio.
 			 *
 			 * @ignore
 			 *
 			 * @param {jQuery} img The preview image.
 			 */
 			onInit: function( img ) {
 				// Ensure that the imgAreaSelect wrapper elements are position:absolute
 				// (even if we're in a position:fixed modal).
 				$img = $( img );
 				$img.next().css( 'position', 'absolute' )
 					.nextAll( '.imgareaselect-outer' ).css( 'position', 'absolute' );
 				/**
 				 * Binds mouse down event to the cropping container.
 				 *
 				 * @return {void}
 				 */
 				parent.children().on( 'mousedown, touchstart', function(e){
 					var ratio = false, sel, defRatio;
 
 					if ( e.shiftKey ) {
 						sel = t.iasapi.getSelection();
 						defRatio = t.getSelRatio(postid);
 						ratio = ( sel && sel.width && sel.height ) ? sel.width + ':' + sel.height : defRatio;
 					}
 
 					t.iasapi.setOptions({
 						aspectRatio: ratio
 					});
 				});
 			},
 
 			/**
 			 * Event triggered when starting a selection.
 			 *
 			 * @ignore
 			 *
 			 * @return {void}
 			 */
 			onSelectStart: function() {
 				imageEdit.setDisabled($('#imgedit-crop-sel-' + postid), 1);
 			},
 			/**
 			 * Event triggered when the selection is ended.
 			 *
 			 * @ignore
 			 *
 			 * @param {Object} img jQuery object representing the image.
 			 * @param {Object} c   The selection.
 			 *
 			 * @return {Object}
 			 */
 			onSelectEnd: function(img, c) {
 				imageEdit.setCropSelection(postid, c);
 			},
 
 			/**
 			 * Event triggered when the selection changes.
 			 *
 			 * @ignore
 			 *
 			 * @param {Object} img jQuery object representing the image.
 			 * @param {Object} c   The selection.
 			 *
 			 * @return {void}
 			 */
 			onSelectChange: function(img, c) {
 				var sizer = imageEdit.hold.sizer;
 				selW.val( imageEdit.round(c.width / sizer) );
 				selH.val( imageEdit.round(c.height / sizer) );
 			}
 		});
 	},
 
 	/**
 	 * Stores the current crop selection.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid The post ID.
 	 * @param {Object} c      The selection.
 	 *
 	 * @return {boolean}
 	 */
 	setCropSelection : function(postid, c) {
 		var sel;
 
 		c = c || 0;
 
 		if ( !c || ( c.width < 3 && c.height < 3 ) ) {
 			this.setDisabled( $( '.imgedit-crop', '#imgedit-panel-' + postid ), 1 );
 			this.setDisabled( $( '#imgedit-crop-sel-' + postid ), 1 );
 			$('#imgedit-sel-width-' + postid).val('');
 			$('#imgedit-sel-height-' + postid).val('');
 			$('#imgedit-selection-' + postid).val('');
 			return false;
 		}
 
 		sel = { 'x': c.x1, 'y': c.y1, 'w': c.width, 'h': c.height };
 		this.setDisabled($('.imgedit-crop', '#imgedit-panel-' + postid), 1);
 		$('#imgedit-selection-' + postid).val( JSON.stringify(sel) );
 	},
 
 
 	/**
 	 * Closes the image editor.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number}  postid The post ID.
 	 * @param {boolean} warn   Warning message.
 	 *
 	 * @return {void|boolean} Returns false if there is a warning.
 	 */
 	close : function(postid, warn) {
 		warn = warn || false;
 
 		if ( warn && this.notsaved(postid) ) {
 			return false;
 		}
 
 		this.iasapi = {};
 		this.hold = {};
 
 		// If we've loaded the editor in the context of a Media Modal,
 		// then switch to the previous view, whatever that might have been.
 		if ( this._view ){
 			this._view.back();
 		}
 
 		// In case we are not accessing the image editor in the context of a View,
 		// close the editor the old-school way.
 		else {
 			$('#image-editor-' + postid).fadeOut('fast', function() {
 				$( '#media-head-' + postid ).fadeIn( 'fast', function() {
 					// Move focus back to the Edit Image button. Runs also when saving.
 					$( '#imgedit-open-btn-' + postid ).trigger( 'focus' );
 				});
 				$(this).empty();
 			});
 		}
 
 
 	},
 
 	/**
 	 * Checks if the image edit history is saved.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid The post ID.
 	 *
 	 * @return {boolean} Returns true if the history is not saved.
 	 */
 	notsaved : function(postid) {
 		var h = $('#imgedit-history-' + postid).val(),
 			history = ( h !== '' ) ? JSON.parse(h) : [],
 			pop = this.intval( $('#imgedit-undone-' + postid).val() );
 
 		if ( pop < history.length ) {
 			if ( confirm( $('#imgedit-leaving-' + postid).html() ) ) {
 				return false;
 			}
 			return true;
 		}
 		return false;
 	},
 
 	/**
 	 * Adds an image edit action to the history.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {Object} op     The original position.
 	 * @param {number} postid The post ID.
 	 * @param {string} nonce  The nonce.
 	 *
 	 * @return {void}
 	 */
 	addStep : function(op, postid, nonce) {
 		var t = this, elem = $('#imgedit-history-' + postid),
 			history = ( elem.val() !== '' ) ? JSON.parse( elem.val() ) : [],
 			undone = $( '#imgedit-undone-' + postid ),
 			pop = t.intval( undone.val() );
 
 		while ( pop > 0 ) {
 			history.pop();
 			pop--;
 		}
 		undone.val(0); // Reset.
 
 		history.push(op);
 		elem.val( JSON.stringify(history) );
 
 		t.refreshEditor(postid, nonce, function() {
 			t.setDisabled($('#image-undo-' + postid), true);
 			t.setDisabled($('#image-redo-' + postid), false);
 		});
 	},
 
 	/**
 	 * Rotates the image.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {string} angle  The angle the image is rotated with.
 	 * @param {number} postid The post ID.
 	 * @param {string} nonce  The nonce.
 	 * @param {Object} t      The target element.
 	 *
 	 * @return {boolean}
 	 */
 	rotate : function(angle, postid, nonce, t) {
 		if ( $(t).hasClass('disabled') ) {
 			return false;
 		}
 
 		this.addStep({ 'r': { 'r': angle, 'fw': this.hold.h, 'fh': this.hold.w }}, postid, nonce);
 	},
 
 	/**
 	 * Flips the image.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} axis   The axle the image is flipped on.
 	 * @param {number} postid The post ID.
 	 * @param {string} nonce  The nonce.
 	 * @param {Object} t      The target element.
 	 *
 	 * @return {boolean}
 	 */
 	flip : function (axis, postid, nonce, t) {
 		if ( $(t).hasClass('disabled') ) {
 			return false;
 		}
 
 		this.addStep({ 'f': { 'f': axis, 'fw': this.hold.w, 'fh': this.hold.h }}, postid, nonce);
 	},
 
 	/**
 	 * Crops the image.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid The post ID.
 	 * @param {string} nonce  The nonce.
 	 * @param {Object} t      The target object.
 	 *
 	 * @return {void|boolean} Returns false if the crop button is disabled.
 	 */
 	crop : function (postid, nonce, t) {
 		var sel = $('#imgedit-selection-' + postid).val(),
 			w = this.intval( $('#imgedit-sel-width-' + postid).val() ),
 			h = this.intval( $('#imgedit-sel-height-' + postid).val() );
 
 		if ( $(t).hasClass('disabled') || sel === '' ) {
 			return false;
 		}
 
 		sel = JSON.parse(sel);
 		if ( sel.w > 0 && sel.h > 0 && w > 0 && h > 0 ) {
 			sel.fw = w;
 			sel.fh = h;
 			this.addStep({ 'c': sel }, postid, nonce);
 		}
 
 		// Clear the selection fields after cropping.
 		$('#imgedit-sel-width-' + postid).val('');
 		$('#imgedit-sel-height-' + postid).val('');
 	},
 
 	/**
 	 * Undoes an image edit action.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid   The post ID.
 	 * @param {string} nonce    The nonce.
 	 *
 	 * @return {void|false} Returns false if the undo button is disabled.
 	 */
 	undo : function (postid, nonce) {
 		var t = this, button = $('#image-undo-' + postid), elem = $('#imgedit-undone-' + postid),
 			pop = t.intval( elem.val() ) + 1;
 
 		if ( button.hasClass('disabled') ) {
 			return;
 		}
 
 		elem.val(pop);
 		t.refreshEditor(postid, nonce, function() {
 			var elem = $('#imgedit-history-' + postid),
 				history = ( elem.val() !== '' ) ? JSON.parse( elem.val() ) : [];
 
 			t.setDisabled($('#image-redo-' + postid), true);
 			t.setDisabled(button, pop < history.length);
 			// When undo gets disabled, move focus to the redo button to avoid a focus loss.
 			if ( history.length === pop ) {
 				$( '#image-redo-' + postid ).trigger( 'focus' );
 			}
 		});
 	},
 
 	/**
 	 * Reverts a undo action.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid The post ID.
 	 * @param {string} nonce  The nonce.
 	 *
 	 * @return {void}
 	 */
 	redo : function(postid, nonce) {
 		var t = this, button = $('#image-redo-' + postid), elem = $('#imgedit-undone-' + postid),
 			pop = t.intval( elem.val() ) - 1;
 
 		if ( button.hasClass('disabled') ) {
 			return;
 		}
 
 		elem.val(pop);
 		t.refreshEditor(postid, nonce, function() {
 			t.setDisabled($('#image-undo-' + postid), true);
 			t.setDisabled(button, pop > 0);
 			// When redo gets disabled, move focus to the undo button to avoid a focus loss.
 			if ( 0 === pop ) {
 				$( '#image-undo-' + postid ).trigger( 'focus' );
 			}
 		});
 	},
 
 	/**
 	 * Sets the selection for the height and width in pixels.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid The post ID.
 	 * @param {jQuery} el     The element containing the values.
 	 *
 	 * @return {void|boolean} Returns false when the x or y value is lower than 1,
 	 *                        void when the value is not numeric or when the operation
 	 *                        is successful.
 	 */
 	setNumSelection : function( postid, el ) {
 		var sel, elX = $('#imgedit-sel-width-' + postid), elY = $('#imgedit-sel-height-' + postid),
 			x = this.intval( elX.val() ), y = this.intval( elY.val() ),
 			img = $('#image-preview-' + postid), imgh = img.height(), imgw = img.width(),
 			sizer = this.hold.sizer, x1, y1, x2, y2, ias = this.iasapi;
 
 		if ( false === this.validateNumeric( el ) ) {
 			return;
 		}
 
 		if ( x < 1 ) {
 			elX.val('');
 			return false;
 		}
 
 		if ( y < 1 ) {
 			elY.val('');
 			return false;
 		}
 
 		if ( x && y && ( sel = ias.getSelection() ) ) {
 			x2 = sel.x1 + Math.round( x * sizer );
 			y2 = sel.y1 + Math.round( y * sizer );
 			x1 = sel.x1;
 			y1 = sel.y1;
 
 			if ( x2 > imgw ) {
 				x1 = 0;
 				x2 = imgw;
 				elX.val( Math.round( x2 / sizer ) );
 			}
 
 			if ( y2 > imgh ) {
 				y1 = 0;
 				y2 = imgh;
 				elY.val( Math.round( y2 / sizer ) );
 			}
 
 			ias.setSelection( x1, y1, x2, y2 );
 			ias.update();
 			this.setCropSelection(postid, ias.getSelection());
 		}
 	},
 
 	/**
 	 * Rounds a number to a whole.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} num The number.
 	 *
 	 * @return {number} The number rounded to a whole number.
 	 */
 	round : function(num) {
 		var s;
 		num = Math.round(num);
 
 		if ( this.hold.sizer > 0.6 ) {
 			return num;
 		}
 
 		s = num.toString().slice(-1);
 
 		if ( '1' === s ) {
 			return num - 1;
 		} else if ( '9' === s ) {
 			return num + 1;
 		}
 
 		return num;
 	},
 
 	/**
 	 * Sets a locked aspect ratio for the selection.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {number} postid     The post ID.
 	 * @param {number} n          The ratio to set.
 	 * @param {jQuery} el         The element containing the values.
 	 *
 	 * @return {void}
 	 */
 	setRatioSelection : function(postid, n, el) {
 		var sel, r, x = this.intval( $('#imgedit-crop-width-' + postid).val() ),
 			y = this.intval( $('#imgedit-crop-height-' + postid).val() ),
 			h = $('#image-preview-' + postid).height();
 
 		if ( false === this.validateNumeric( el ) ) {
 			this.iasapi.setOptions({
 				aspectRatio: null
 			});
 
 			return;
 		}
 
 		if ( x && y ) {
 			this.iasapi.setOptions({
 				aspectRatio: x + ':' + y
 			});
 
 			if ( sel = this.iasapi.getSelection(true) ) {
 				r = Math.ceil( sel.y1 + ( ( sel.x2 - sel.x1 ) / ( x / y ) ) );
 
 				if ( r > h ) {
 					r = h;
 					if ( n ) {
 						$('#imgedit-crop-height-' + postid).val('');
 					} else {
 						$('#imgedit-crop-width-' + postid).val('');
 					}
 				}
 
 				this.iasapi.setSelection( sel.x1, sel.y1, sel.x2, r );
 				this.iasapi.update();
 			}
 		}
 	},
 
 	/**
 	 * Validates if a value in a jQuery.HTMLElement is numeric.
 	 *
 	 * @since 4.6.0
 	 *
 	 * @memberof imageEdit
 	 *
 	 * @param {jQuery} el The html element.
 	 *
 	 * @return {void|boolean} Returns false if the value is not numeric,
 	 *                        void when it is.
 	 */
 	validateNumeric: function( el ) {
 		if ( ! this.intval( $( el ).val() ) ) {
 			$( el ).val( '' );
 			return false;
 		}
 	}
 };
 })(jQuery);