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/**
* @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or http://ckeditor.com/license
*/
/**
* @fileOverview The Auto Grow plugin.
*/
'use strict';
( function() {
CKEDITOR.plugins.add( 'autogrow', {
init: function( editor ) {
// This feature is available only for themed ui instance.
if ( editor.elementMode == CKEDITOR.ELEMENT_MODE_INLINE )
return;
editor.on( 'instanceReady', function() {
// Simply set auto height with div wysiwyg.
if ( editor.editable().isInline() )
editor.ui.space( 'contents' ).setStyle( 'height', 'auto' );
// For classic (`iframe`-based) wysiwyg we need to resize the editor.
else
initIframeAutogrow( editor );
} );
}
} );
function initIframeAutogrow( editor ) {
var lastHeight,
doc,
markerContainer,
scrollable,
marker,
configBottomSpace = editor.config.autoGrow_bottomSpace || 0,
configMinHeight = editor.config.autoGrow_minHeight !== undefined ? editor.config.autoGrow_minHeight : 200,
configMaxHeight = editor.config.autoGrow_maxHeight || Infinity,
maxHeightIsUnlimited = !editor.config.autoGrow_maxHeight;
editor.addCommand( 'autogrow', {
exec: resizeEditor,
modes: { wysiwyg: 1 },
readOnly: 1,
canUndo: false,
editorFocus: false
} );
var eventsList = { contentDom: 1, key: 1, selectionChange: 1, insertElement: 1, mode: 1 };
for ( var eventName in eventsList ) {
editor.on( eventName, function( evt ) {
// Some time is required for insertHtml, and it gives other events better performance as well.
if ( evt.editor.mode == 'wysiwyg' ) {
setTimeout( function() {
if ( isNotResizable() ) {
lastHeight = null;
return;
}
resizeEditor();
// Second pass to make correction upon the first resize, e.g. scrollbar.
// If height is unlimited vertical scrollbar was removed in the first
// resizeEditor() call, so we don't need the second pass.
if ( !maxHeightIsUnlimited )
resizeEditor();
}, 100 );
}
} );
}
// Coordinate with the "maximize" plugin. (#9311)
editor.on( 'afterCommandExec', function( evt ) {
if ( evt.data.name == 'maximize' && evt.editor.mode == 'wysiwyg' ) {
if ( evt.data.command.state == CKEDITOR.TRISTATE_ON )
scrollable.removeStyle( 'overflow-y' );
else
resizeEditor();
}
} );
editor.on( 'contentDom', refreshCache );
refreshCache();
editor.config.autoGrow_onStartup && editor.execCommand( 'autogrow' );
function refreshCache() {
doc = editor.document;
markerContainer = doc[ CKEDITOR.env.ie ? 'getBody' : 'getDocumentElement' ]();
// Quirks mode overflows body, standards overflows document element.
scrollable = CKEDITOR.env.quirks ? doc.getBody() : doc.getDocumentElement();
marker = CKEDITOR.dom.element.createFromHtml(
'<span style="margin:0;padding:0;border:0;clear:both;width:1px;height:1px;display:block;">' +
( CKEDITOR.env.webkit ? ' ' : '' ) +
'</span>',
doc );
}
function isNotResizable() {
var maximizeCommand = editor.getCommand( 'maximize' );
return (
!editor.window ||
// Disable autogrow when the editor is maximized. (#6339)
maximizeCommand && maximizeCommand.state == CKEDITOR.TRISTATE_ON
);
}
// Actual content height, figured out by appending check the last element's document position.
function contentHeight() {
// Append a temporary marker element.
markerContainer.append( marker );
var height = marker.getDocumentPosition( doc ).y + marker.$.offsetHeight;
marker.remove();
return height;
}
function resizeEditor() {
// Hide scroll because we won't need it at all.
// Thanks to that we'll need only one resizeEditor() call per change.
if ( maxHeightIsUnlimited )
scrollable.setStyle( 'overflow-y', 'hidden' );
var currentHeight = editor.window.getViewPaneSize().height,
newHeight = contentHeight();
// Additional space specified by user.
newHeight += configBottomSpace;
newHeight = Math.max( newHeight, configMinHeight );
newHeight = Math.min( newHeight, configMaxHeight );
// #10196 Do not resize editor if new height is equal
// to the one set by previous resizeEditor() call.
if ( newHeight != currentHeight && lastHeight != newHeight ) {
newHeight = editor.fire( 'autoGrow', { currentHeight: currentHeight, newHeight: newHeight } ).newHeight;
editor.resize( editor.container.getStyle( 'width' ), newHeight, true );
lastHeight = newHeight;
}
if ( !maxHeightIsUnlimited ) {
if ( newHeight < configMaxHeight && scrollable.$.scrollHeight > scrollable.$.clientHeight )
scrollable.setStyle( 'overflow-y', 'hidden' );
else
scrollable.removeStyle( 'overflow-y' );
}
}
}
} )();
/**
* The minimum height that the editor can assume when adjusting to content by using the Auto Grow
* feature. This option accepts a value in pixels, without the unit (for example: `300`).
*
* config.autoGrow_minHeight = 300;
*
* @since 3.4
* @cfg {Number} [autoGrow_minHeight=200]
* @member CKEDITOR.config
*/
/**
* The maximum height that the editor can assume when adjusting to content by using the Auto Grow
* feature. This option accepts a value in pixels, without the unit (for example: `600`).
* Zero (`0`) means that the maximum height is not limited and the editor will expand infinitely.
*
* config.autoGrow_maxHeight = 400;
*
* @since 3.4
* @cfg {Number} [autoGrow_maxHeight=0]
* @member CKEDITOR.config
*/
/**
* Whether automatic editor height adjustment brought by the Auto Grow feature should happen on
* editor creation.
*
* config.autoGrow_onStartup = true;
*
* @since 3.6.2
* @cfg {Boolean} [autoGrow_onStartup=false]
* @member CKEDITOR.config
*/
/**
* Extra vertical space to be added between the content and the editor bottom bar when adjusting
* editor height to content by using the Auto Grow feature. This option accepts a value in pixels,
* without the unit (for example: `50`).
*
* config.autoGrow_bottomSpace = 50;
*
* @since 3.6.2
* @cfg {Number} [autoGrow_bottomSpace=0]
* @member CKEDITOR.config
*/
/**
* Fired when the Auto Grow plugin is about to change the size of the editor.
*
* @event autogrow
* @member CKEDITOR.editor
* @param {CKEDITOR.editor} editor This editor instance.
* @param data
* @param {Number} data.currentHeight The current editor height (before resizing).
* @param {Number} data.newHeight The new editor height (after resizing). It can be changed
* to achieve a different height value to be used instead.
*/
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