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/*
Copyright (c) 2003-2012, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/
(function()
{
var meta =
{
editorFocus : false,
modes : { wysiwyg:1, source:1 }
};
var blurCommand =
{
exec : function( editor )
{
editor.container.focusNext( true, editor.tabIndex );
}
};
var blurBackCommand =
{
exec : function( editor )
{
editor.container.focusPrevious( true, editor.tabIndex );
}
};
function selectNextCellCommand( backward )
{
return {
editorFocus : false,
canUndo : false,
modes : { wysiwyg : 1 },
exec : function( editor )
{
if ( editor.focusManager.hasFocus )
{
var sel = editor.getSelection(),
ancestor = sel.getCommonAncestor(),
cell;
if ( ( cell = ( ancestor.getAscendant( 'td', true ) || ancestor.getAscendant( 'th', true ) ) ) )
{
var resultRange = new CKEDITOR.dom.range( editor.document ),
next = CKEDITOR.tools.tryThese( function()
{
var row = cell.getParent(),
next = row.$.cells[ cell.$.cellIndex + ( backward ? - 1 : 1 ) ];
// Invalid any empty value.
next.parentNode.parentNode;
return next;
},
function()
{
var row = cell.getParent(),
table = row.getAscendant( 'table' ),
nextRow = table.$.rows[ row.$.rowIndex + ( backward ? - 1 : 1 ) ];
return nextRow.cells[ backward? nextRow.cells.length -1 : 0 ];
});
// Clone one more row at the end of table and select the first newly established cell.
if ( ! ( next || backward ) )
{
var table = cell.getAscendant( 'table' ).$,
cells = cell.getParent().$.cells;
var newRow = new CKEDITOR.dom.element( table.insertRow( -1 ), editor.document );
for ( var i = 0, count = cells.length ; i < count; i++ )
{
var newCell = newRow.append( new CKEDITOR.dom.element(
cells[ i ], editor.document ).clone( false, false ) );
!CKEDITOR.env.ie && newCell.appendBogus();
}
resultRange.moveToElementEditStart( newRow );
}
else if ( next )
{
next = new CKEDITOR.dom.element( next );
resultRange.moveToElementEditStart( next );
// Avoid selecting empty block makes the cursor blind.
if ( !( resultRange.checkStartOfBlock() && resultRange.checkEndOfBlock() ) )
resultRange.selectNodeContents( next );
}
else
return true;
resultRange.select( true );
return true;
}
}
return false;
}
};
}
CKEDITOR.plugins.add( 'tab',
{
requires : [ 'keystrokes' ],
init : function( editor )
{
var tabTools = editor.config.enableTabKeyTools !== false,
tabSpaces = editor.config.tabSpaces || 0,
tabText = '';
while ( tabSpaces-- )
tabText += '\xa0';
if ( tabText )
{
editor.on( 'key', function( ev )
{
if ( ev.data.keyCode == 9 ) // TAB
{
editor.insertHtml( tabText );
ev.cancel();
}
});
}
if ( tabTools )
{
editor.on( 'key', function( ev )
{
if ( ev.data.keyCode == 9 && editor.execCommand( 'selectNextCell' ) || // TAB
ev.data.keyCode == ( CKEDITOR.SHIFT + 9 ) && editor.execCommand( 'selectPreviousCell' ) ) // SHIFT+TAB
ev.cancel();
});
}
if ( CKEDITOR.env.webkit || CKEDITOR.env.gecko )
{
editor.on( 'key', function( ev )
{
var keyCode = ev.data.keyCode;
if ( keyCode == 9 && !tabText ) // TAB
{
ev.cancel();
editor.execCommand( 'blur' );
}
if ( keyCode == ( CKEDITOR.SHIFT + 9 ) ) // SHIFT+TAB
{
editor.execCommand( 'blurBack' );
ev.cancel();
}
});
}
editor.addCommand( 'blur', CKEDITOR.tools.extend( blurCommand, meta ) );
editor.addCommand( 'blurBack', CKEDITOR.tools.extend( blurBackCommand, meta ) );
editor.addCommand( 'selectNextCell', selectNextCellCommand() );
editor.addCommand( 'selectPreviousCell', selectNextCellCommand( true ) );
}
});
})();
/**
* Moves the UI focus to the element following this element in the tabindex
* order.
* @example
* var element = CKEDITOR.document.getById( 'example' );
* element.focusNext();
*/
CKEDITOR.dom.element.prototype.focusNext = function( ignoreChildren, indexToUse )
{
var $ = this.$,
curTabIndex = ( indexToUse === undefined ? this.getTabIndex() : indexToUse ),
passedCurrent, enteredCurrent,
elected, electedTabIndex,
element, elementTabIndex;
if ( curTabIndex <= 0 )
{
// If this element has tabindex <= 0 then we must simply look for any
// element following it containing tabindex=0.
element = this.getNextSourceNode( ignoreChildren, CKEDITOR.NODE_ELEMENT );
while ( element )
{
if ( element.isVisible() && element.getTabIndex() === 0 )
{
elected = element;
break;
}
element = element.getNextSourceNode( false, CKEDITOR.NODE_ELEMENT );
}
}
else
{
// If this element has tabindex > 0 then we must look for:
// 1. An element following this element with the same tabindex.
// 2. The first element in source other with the lowest tabindex
// that is higher than this element tabindex.
// 3. The first element with tabindex=0.
element = this.getDocument().getBody().getFirst();
while ( ( element = element.getNextSourceNode( false, CKEDITOR.NODE_ELEMENT ) ) )
{
if ( !passedCurrent )
{
if ( !enteredCurrent && element.equals( this ) )
{
enteredCurrent = true;
// Ignore this element, if required.
if ( ignoreChildren )
{
if ( !( element = element.getNextSourceNode( true, CKEDITOR.NODE_ELEMENT ) ) )
break;
passedCurrent = 1;
}
}
else if ( enteredCurrent && !this.contains( element ) )
passedCurrent = 1;
}
if ( !element.isVisible() || ( elementTabIndex = element.getTabIndex() ) < 0 )
continue;
if ( passedCurrent && elementTabIndex == curTabIndex )
{
elected = element;
break;
}
if ( elementTabIndex > curTabIndex && ( !elected || !electedTabIndex || elementTabIndex < electedTabIndex ) )
{
elected = element;
electedTabIndex = elementTabIndex;
}
else if ( !elected && elementTabIndex === 0 )
{
elected = element;
electedTabIndex = elementTabIndex;
}
}
}
if ( elected )
elected.focus();
};
/**
* Moves the UI focus to the element before this element in the tabindex order.
* @example
* var element = CKEDITOR.document.getById( 'example' );
* element.focusPrevious();
*/
CKEDITOR.dom.element.prototype.focusPrevious = function( ignoreChildren, indexToUse )
{
var $ = this.$,
curTabIndex = ( indexToUse === undefined ? this.getTabIndex() : indexToUse ),
passedCurrent, enteredCurrent,
elected,
electedTabIndex = 0,
elementTabIndex;
var element = this.getDocument().getBody().getLast();
while ( ( element = element.getPreviousSourceNode( false, CKEDITOR.NODE_ELEMENT ) ) )
{
if ( !passedCurrent )
{
if ( !enteredCurrent && element.equals( this ) )
{
enteredCurrent = true;
// Ignore this element, if required.
if ( ignoreChildren )
{
if ( !( element = element.getPreviousSourceNode( true, CKEDITOR.NODE_ELEMENT ) ) )
break;
passedCurrent = 1;
}
}
else if ( enteredCurrent && !this.contains( element ) )
passedCurrent = 1;
}
if ( !element.isVisible() || ( elementTabIndex = element.getTabIndex() ) < 0 )
continue;
if ( curTabIndex <= 0 )
{
// If this element has tabindex <= 0 then we must look for:
// 1. An element before this one containing tabindex=0.
// 2. The last element with the highest tabindex.
if ( passedCurrent && elementTabIndex === 0 )
{
elected = element;
break;
}
if ( elementTabIndex > electedTabIndex )
{
elected = element;
electedTabIndex = elementTabIndex;
}
}
else
{
// If this element has tabindex > 0 we must look for:
// 1. An element preceeding this one, with the same tabindex.
// 2. The last element in source other with the highest tabindex
// that is lower than this element tabindex.
if ( passedCurrent && elementTabIndex == curTabIndex )
{
elected = element;
break;
}
if ( elementTabIndex < curTabIndex && ( !elected || elementTabIndex > electedTabIndex ) )
{
elected = element;
electedTabIndex = elementTabIndex;
}
}
}
if ( elected )
elected.focus();
};
/**
* Intructs the editor to add a number of spaces (&nbsp;) to the text when
* hitting the TAB key. If set to zero, the TAB key will be used to move the
* cursor focus to the next element in the page, out of the editor focus.
* @name CKEDITOR.config.tabSpaces
* @type Number
* @default 0
* @example
* config.tabSpaces = 4;
*/
/**
* Allow context-sensitive tab key behaviors, including the following scenarios:
* <h5>When selection is anchored inside <b>table cells</b>:</h5>
* <ul>
* <li>If TAB is pressed, select the contents of the "next" cell. If in the last cell in the table, add a new row to it and focus its first cell.</li>
* <li>If SHIFT+TAB is pressed, select the contents of the "previous" cell. Do nothing when it's in the first cell.</li>
* </ul>
* @name CKEDITOR.config.enableTabKeyTools
* @type Boolean
* @default true
* @example
* config.enableTabKeyTools = false;
*/
// If the TAB key is not supposed to be enabled for navigation, the following
// settings could be used alternatively:
// config.keystrokes.push(
// [ CKEDITOR.ALT + 38 /*Arrow Up*/, 'selectPreviousCell' ],
// [ CKEDITOR.ALT + 40 /*Arrow Down*/, 'selectNextCell' ]
// );
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