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lib/ckeditor4/plugins/autogrow/plugin.js
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/**
* @license Copyright (c) 2003-2013, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or http://ckeditor.com/license
*/
/**
* @fileOverview AutoGrow plugin.
*/
(function() {
// Actual content height, figured out by appending check the last element's document position.
function contentHeight( scrollable ) {
var overflowY = scrollable.getStyle( 'overflow-y' );
var doc = scrollable.getDocument();
// Create a temporary marker element.
var marker = CKEDITOR.dom.element.createFromHtml( '<span style="margin:0;padding:0;border:0;clear:both;width:1px;height:1px;display:block;">' + ( CKEDITOR.env.webkit ? '&nbsp;' : '' ) + '</span>', doc );
doc[ CKEDITOR.env.ie ? 'getBody' : 'getDocumentElement' ]().append( marker );
var height = marker.getDocumentPosition( doc ).y + marker.$.offsetHeight;
marker.remove();
scrollable.setStyle( 'overflow-y', overflowY );
return height;
}
function getScrollable( editor ) {
var doc = editor.document,
body = doc.getBody(),
htmlElement = doc.getDocumentElement();
// Quirks mode overflows body, standards overflows document element
return doc.$.compatMode == 'BackCompat' ? body : htmlElement;
}
// @param editor
// @param {Number} lastHeight The last height set by autogrow.
// @returns {Number} New height if has been changed, or the passed `lastHeight`.
var resizeEditor = function( editor, lastHeight ) {
if ( !editor.window )
return null;
var maximize = editor.getCommand( 'maximize' );
// Disable autogrow when the editor is maximized .(#6339)
if( maximize && maximize.state == CKEDITOR.TRISTATE_ON )
return null;
var scrollable = getScrollable( editor ),
currentHeight = editor.window.getViewPaneSize().height,
newHeight = contentHeight( scrollable );
// Additional space specified by user.
newHeight += ( editor.config.autoGrow_bottomSpace || 0 );
var min = editor.config.autoGrow_minHeight != undefined ? editor.config.autoGrow_minHeight : 200,
max = editor.config.autoGrow_maxHeight || Infinity;
newHeight = Math.max( newHeight, min );
newHeight = Math.min( newHeight, max );
// #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 ( scrollable.$.scrollHeight > scrollable.$.clientHeight && newHeight < max )
scrollable.setStyle( 'overflow-y', 'hidden' );
else
scrollable.removeStyle( 'overflow-y' );
return lastHeight;
};
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() {
var editable = editor.editable(),
lastHeight;
// Simply set auto height with div wysiwyg.
if ( editable.isInline() )
editor.ui.space( 'contents' ).setStyle( 'height', 'auto' );
// For framed wysiwyg we need to resize the editor.
else
{
editor.addCommand( 'autogrow', {
exec: function( editor ) {
lastHeight = resizeEditor( editor, lastHeight );
},
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() {
lastHeight = resizeEditor( evt.editor, lastHeight );
// Second pass to make correction upon
// the first resize, e.g. scrollbar.
lastHeight = resizeEditor( evt.editor, lastHeight );
}, 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 ) {
var scrollable = getScrollable( editor );
scrollable.removeStyle( 'overflow' );
}
else
lastHeight = resizeEditor( editor, lastHeight );
}
});
editor.config.autoGrow_onStartup && editor.execCommand( 'autogrow' );
}
});
}
});
})();
/**
* The minimum height that the editor can reach using the AutoGrow feature.
*
* config.autoGrow_minHeight = 300;
*
* @since 3.4
* @cfg {Number} [autoGrow_minHeight=200]
* @member CKEDITOR.config
*/
/**
* The maximum height that the editor can reach using the AutoGrow feature. Zero means unlimited.
*
* config.autoGrow_maxHeight = 400;
*
* @since 3.4
* @cfg {Number} [autoGrow_maxHeight=0]
* @member CKEDITOR.config
*/
/**
* Whether to have the auto grow happen on editor creation.
*
* config.autoGrow_onStartup = true;
*
* @since 3.6.2
* @cfg {Boolean} [autoGrow_onStartup=false]
* @member CKEDITOR.config
*/
/**
* Extra height in pixel to leave between the bottom boundary of content with document size when auto resizing.
*
* @since 3.6.2
* @cfg {Number} [autoGrow_bottomSpace=0]
* @member CKEDITOR.config
*/
/**
* Fired when the AutoGrow 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 height of the editor (before resizing).
* @param {Number} data.newHeight The new height of the editor (after resizing). It can be changed
* to determine a different height value to be used instead.
*/
lib/ckeditor4/plugins/autogrow/samples/autogrow.html
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<!DOCTYPE html>
<!--
Copyright (c) 2003-2013, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.md or http://ckeditor.com/license
-->
<html>
<head>
<title>AutoGrow Plugin &mdash; CKEditor Sample</title>
<meta charset="utf-8">
<script src="../../../ckeditor.js"></script>
<link rel="stylesheet" href="../../../samples/sample.css">
<meta name="ckeditor-sample-name" content="AutoGrow plugin">
<meta name="ckeditor-sample-group" content="Plugins">
<meta name="ckeditor-sample-description" content="Using the AutoGrow plugin in order to make the editor grow to fit the size of its content.">
</head>
<body>
<h1 class="samples">
<a href="../../../samples/index.html">CKEditor Samples</a> &raquo; Using AutoGrow Plugin
</h1>
<div class="description">
<p>
This sample shows how to configure CKEditor instances to use the
<strong>AutoGrow</strong> (<code>autogrow</code>) plugin that lets the editor window expand
and shrink depending on the amount and size of content entered in the editing area.
</p>
<p>
In its default implementation the <strong>AutoGrow feature</strong> can expand the
CKEditor window infinitely in order to avoid introducing scrollbars to the editing area.
</p>
<p>
It is also possible to set a maximum height for the editor window. Once CKEditor
editing area reaches the value in pixels specified in the
<code><a class="samples" href="http://docs.ckeditor.com/#!/api/CKEDITOR.config-cfg-autoGrow_maxHeight">autoGrow_maxHeight</a></code>
configuration setting, scrollbars will be added and the editor window will no longer expand.
</p>
<p>
To add a CKEditor instance using the <code>autogrow</code> plugin and its
<code>autoGrow_maxHeight</code> attribute, insert the following JavaScript call to your code:
</p>
<pre class="samples">
CKEDITOR.replace( '<em>textarea_id</em>', {
<strong>extraPlugins: 'autogrow',</strong>
autoGrow_maxHeight: 800,
// Remove the Resize plugin as it does not make sense to use it in conjunction with the AutoGrow plugin.
removePlugins: 'resize'
});</pre>
<p>
Note that <code><em>textarea_id</em></code> in the code above is the <code>id</code> attribute of
the <code>&lt;textarea&gt;</code> element to be replaced with CKEditor. The maximum height should
be given in pixels.
</p>
</div>
<form action="../../../samples/sample_posteddata.php" method="post">
<p>
<label for="editor1">
CKEditor using the <code>autogrow</code> plugin with its default configuration:
</label>
<textarea cols="80" id="editor1" name="editor1" rows="10">&lt;p&gt;This is some &lt;strong&gt;sample text&lt;/strong&gt;. You are using &lt;a href="http://ckeditor.com/"&gt;CKEditor&lt;/a&gt;.&lt;/p&gt;</textarea>
<script>
CKEDITOR.replace( 'editor1', {
extraPlugins: 'autogrow',
removePlugins: 'resize'
});
</script>
</p>
<p>
<label for="editor2">
CKEditor using the <code>autogrow</code> plugin with maximum height set to 400 pixels:
</label>
<textarea cols="80" id="editor2" name="editor2" rows="10">&lt;p&gt;This is some &lt;strong&gt;sample text&lt;/strong&gt;. You are using &lt;a href="http://ckeditor.com/"&gt;CKEditor&lt;/a&gt;.&lt;/p&gt;</textarea>
<script>
CKEDITOR.replace( 'editor2', {
extraPlugins: 'autogrow',
autoGrow_maxHeight: 400,
removePlugins: 'resize'
});
</script>
</p>
<p>
<input type="submit" value="Submit">
</p>
</form>
<div id="footer">
<hr>
<p>
CKEditor - The text editor for the Internet - <a class="samples" href="http://ckeditor.com/">http://ckeditor.com</a>
</p>
<p id="copy">
Copyright &copy; 2003-2013, <a class="samples" href="http://cksource.com/">CKSource</a> - Frederico
Knabben. All rights reserved.
</p>
</div>
</body>
</html>