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wp-includes/js/tinymce/plugins/wpautoresize/plugin.js

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+/**
+ * plugin.js
+ *
+ * Copyright, Moxiecode Systems AB
+ * Released under LGPL License.
+ *
+ * License: http://www.tinymce.com/license
+ * Contributing: http://www.tinymce.com/contributing
+ */
+
+// Forked for WordPress so it can be turned on/off after loading.
+
+/*global tinymce:true */
+/*eslint no-nested-ternary:0 */
+
+/**
+ * Auto Resize
+ *
+ * This plugin automatically resizes the content area to fit its content height.
+ * It will retain a minimum height, which is the height of the content area when
+ * it's initialized.
+ */
+tinymce.PluginManager.add( 'wpautoresize', function( editor ) {
+	var settings = editor.settings,
+		oldSize = 300,
+		isActive = false;
+
+	if ( editor.settings.inline || tinymce.Env.iOS ) {
+		return;
+	}
+
+	function isFullscreen() {
+		return editor.plugins.fullscreen && editor.plugins.fullscreen.isFullscreen();
+	}
+
+	function getInt( n ) {
+		return parseInt( n, 10 ) || 0;
+	}
+
+	/**
+	 * This method gets executed each time the editor needs to resize.
+	 */
+	function resize( e ) {
+		var deltaSize, doc, body, docElm, DOM = tinymce.DOM, resizeHeight, myHeight,
+			marginTop, marginBottom, paddingTop, paddingBottom, borderTop, borderBottom;
+
+		if ( ! isActive ) {
+			return;
+		}
+
+		doc = editor.getDoc();
+		if ( ! doc ) {
+			return;
+		}
+
+		e = e || {};
+		body = doc.body;
+		docElm = doc.documentElement;
+		resizeHeight = settings.autoresize_min_height;
+
+		if ( ! body || ( e && e.type === 'setcontent' && e.initial ) || isFullscreen() ) {
+			if ( body && docElm ) {
+				body.style.overflowY = 'auto';
+				docElm.style.overflowY = 'auto'; // Old IE
+			}
+
+			return;
+		}
+
+		// Calculate outer height of the body element using CSS styles
+		marginTop = editor.dom.getStyle( body, 'margin-top', true );
+		marginBottom = editor.dom.getStyle( body, 'margin-bottom', true );
+		paddingTop = editor.dom.getStyle( body, 'padding-top', true );
+		paddingBottom = editor.dom.getStyle( body, 'padding-bottom', true );
+		borderTop = editor.dom.getStyle( body, 'border-top-width', true );
+		borderBottom = editor.dom.getStyle( body, 'border-bottom-width', true );
+		myHeight = body.offsetHeight + getInt( marginTop ) + getInt( marginBottom ) +
+			getInt( paddingTop ) + getInt( paddingBottom ) +
+			getInt( borderTop ) + getInt( borderBottom );
+
+		// IE < 11, other?
+		if ( myHeight && myHeight < docElm.offsetHeight ) {
+			myHeight = docElm.offsetHeight;
+		}
+
+		// Make sure we have a valid height
+		if ( isNaN( myHeight ) || myHeight <= 0 ) {
+			// Get height differently depending on the browser used
+			myHeight = tinymce.Env.ie ? body.scrollHeight : ( tinymce.Env.webkit && body.clientHeight === 0 ? 0 : body.offsetHeight );
+		}
+
+		// Don't make it smaller than the minimum height
+		if ( myHeight > settings.autoresize_min_height ) {
+			resizeHeight = myHeight;
+		}
+
+		// If a maximum height has been defined don't exceed this height
+		if ( settings.autoresize_max_height && myHeight > settings.autoresize_max_height ) {
+			resizeHeight = settings.autoresize_max_height;
+			body.style.overflowY = 'auto';
+			docElm.style.overflowY = 'auto'; // Old IE
+		} else {
+			body.style.overflowY = 'hidden';
+			docElm.style.overflowY = 'hidden'; // Old IE
+			body.scrollTop = 0;
+		}
+
+		// Resize content element
+		if (resizeHeight !== oldSize) {
+			deltaSize = resizeHeight - oldSize;
+			DOM.setStyle( editor.iframeElement, 'height', resizeHeight + 'px' );
+			oldSize = resizeHeight;
+
+			// WebKit doesn't decrease the size of the body element until the iframe gets resized
+			// So we need to continue to resize the iframe down until the size gets fixed
+			if ( tinymce.isWebKit && deltaSize < 0 ) {
+				resize( e );
+			}
+
+			editor.fire( 'wp-autoresize', { height: resizeHeight, deltaHeight: e.type === 'nodechange' ? deltaSize : null } );
+		}
+	}
+
+	/**
+	 * Calls the resize x times in 100ms intervals. We can't wait for load events since
+	 * the CSS files might load async.
+	 */
+	function wait( times, interval, callback ) {
+		setTimeout( function() {
+			resize();
+
+			if ( times-- ) {
+				wait( times, interval, callback );
+			} else if ( callback ) {
+				callback();
+			}
+		}, interval );
+	}
+
+	// Define minimum height
+	settings.autoresize_min_height = parseInt(editor.getParam( 'autoresize_min_height', editor.getElement().offsetHeight), 10 );
+
+	// Define maximum height
+	settings.autoresize_max_height = parseInt(editor.getParam( 'autoresize_max_height', 0), 10 );
+
+	function on() {
+		if ( ! editor.dom.hasClass( editor.getBody(), 'wp-autoresize' ) ) {
+			isActive = true;
+			editor.dom.addClass( editor.getBody(), 'wp-autoresize' );
+			// Add appropriate listeners for resizing the content area
+			editor.on( 'nodechange setcontent keyup FullscreenStateChanged', resize );
+			resize();
+		}
+	}
+
+	function off() {
+		var doc;
+
+		// Don't turn off if the setting is 'on'
+		if ( ! settings.wp_autoresize_on ) {
+			isActive = false;
+			doc = editor.getDoc();
+			editor.dom.removeClass( editor.getBody(), 'wp-autoresize' );
+			editor.off( 'nodechange setcontent keyup FullscreenStateChanged', resize );
+			doc.body.style.overflowY = 'auto';
+			doc.documentElement.style.overflowY = 'auto'; // Old IE
+			oldSize = 0;
+		}
+	}
+
+	if ( settings.wp_autoresize_on ) {
+		// Turn resizing on when the editor loads
+		isActive = true;
+
+		editor.on( 'init', function() {
+			editor.dom.addClass( editor.getBody(), 'wp-autoresize' );
+		});
+
+		editor.on( 'nodechange keyup FullscreenStateChanged', resize );
+
+		editor.on( 'setcontent', function() {
+			wait( 3, 100 );
+		});
+
+		if ( editor.getParam( 'autoresize_on_init', true ) ) {
+			editor.on( 'init', function() {
+				// Hit it 10 times in 200 ms intervals
+				wait( 10, 200, function() {
+					// Hit it 5 times in 1 sec intervals
+					wait( 5, 1000 );
+				});
+			});
+		}
+	}
+
+	// Reset the stored size
+	editor.on( 'show', function() {
+		oldSize = 0;
+	});
+
+	// Register the command
+	editor.addCommand( 'wpAutoResize', resize );
+
+	// On/off
+	editor.addCommand( 'wpAutoResizeOn', on );
+	editor.addCommand( 'wpAutoResizeOff', off );
+});