text: ﻿/*
  Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
  For licensing, see LICENSE.html or http://ckeditor.com/license
  */
  
  (function()
  {
    CKEDITOR.plugins.add( 'enterkey',
    {
      requires : [ 'keystrokes', 'indent' ],
  
      init : function( editor )
      {
        editor.addCommand( 'enter', {
          modes : { wysiwyg:1 },
          editorFocus : false,
          exec : function( editor ){ enter( editor ); }
        });
  
        editor.addCommand( 'shiftEnter', {
          modes : { wysiwyg:1 },
          editorFocus : false,
          exec : function( editor ){ shiftEnter( editor ); }
        });
  
        var keystrokes = editor.keystrokeHandler.keystrokes;
        keystrokes[ 13 ] = 'enter';
        keystrokes[ CKEDITOR.SHIFT + 13 ] = 'shiftEnter';
      }
    });
  
    CKEDITOR.plugins.enterkey =
    {
      enterBlock : function( editor, mode, range, forceMode )
      {
        // Get the range for the current selection.
        range = range || getRange( editor );
  
        // We may not have valid ranges to work on, like when inside a
        // contenteditable=false element.
        if ( !range )
          return;
  
        var doc = range.document;
  
        var atBlockStart = range.checkStartOfBlock(),
          atBlockEnd = range.checkEndOfBlock(),
          path = new CKEDITOR.dom.elementPath( range.startContainer ),
          block = path.block;
  
        if ( atBlockStart && atBlockEnd )
        {
          // Exit the list when we're inside an empty list item block. (#5376)
          if ( block && ( block.is( 'li' ) || block.getParent().is( 'li' ) ) )
          {
            editor.execCommand( 'outdent' );
            return;
          }
  
          if ( block && block.getParent().is( 'blockquote' ) )
          {
            block.breakParent( block.getParent() );
  
            // If we were at the start of <blockquote>, there will be an empty element before it now.
            if ( !block.getPrevious().getFirst( CKEDITOR.dom.walker.invisible(1) ) )
              block.getPrevious().remove();
  
            // If we were at the end of <blockquote>, there will be an empty element after it now.
            if ( !block.getNext().getFirst( CKEDITOR.dom.walker.invisible(1) ) )
              block.getNext().remove();
  
            range.moveToElementEditStart( block );
            range.select();
            return;
          }
        }
        // Don't split <pre> if we're in the middle of it, act as shift enter key.
        else if ( block && block.is( 'pre' ) )
        {
          if ( !atBlockEnd )
          {
            enterBr( editor, mode, range, forceMode );
            return;
          }
        }
        // Don't split caption blocks. (#7944)
        else if ( block && CKEDITOR.dtd.$captionBlock[ block.getName() ] )
        {
          enterBr( editor, mode, range, forceMode );
          return;
        }
  
        // Determine the block element to be used.
        var blockTag = ( mode == CKEDITOR.ENTER_DIV ? 'div' : 'p' );
  
        // Split the range.
        var splitInfo = range.splitBlock( blockTag );
  
        if ( !splitInfo )
          return;
  
        // Get the current blocks.
        var previousBlock  = splitInfo.previousBlock,
          nextBlock    = splitInfo.nextBlock;
  
        var isStartOfBlock  = splitInfo.wasStartOfBlock,
          isEndOfBlock  = splitInfo.wasEndOfBlock;
  
        var node;
  
        // If this is a block under a list item, split it as well. (#1647)
        if ( nextBlock )
        {
          node = nextBlock.getParent();
          if ( node.is( 'li' ) )
          {
            nextBlock.breakParent( node );
            nextBlock.move( nextBlock.getNext(), 1 );
          }
        }
        else if ( previousBlock && ( node = previousBlock.getParent() ) && node.is( 'li' ) )
        {
          previousBlock.breakParent( node );
          node = previousBlock.getNext();
          range.moveToElementEditStart( node );
          previousBlock.move( previousBlock.getPrevious() );
        }
  
        // If we have both the previous and next blocks, it means that the
        // boundaries were on separated blocks, or none of them where on the
        // block limits (start/end).
        if ( !isStartOfBlock && !isEndOfBlock )
        {
          // If the next block is an <li> with another list tree as the first
          // child, we'll need to append a filler (<br>/NBSP) or the list item
          // wouldn't be editable. (#1420)
          if ( nextBlock.is( 'li' )
             && ( node = nextBlock.getFirst( CKEDITOR.dom.walker.invisible( true ) ) )
             && node.is && node.is( 'ul', 'ol' ) )
            ( CKEDITOR.env.ie ? doc.createText( '\xa0' ) : doc.createElement( 'br' ) ).insertBefore( node );
  
          // Move the selection to the end block.
          if ( nextBlock )
            range.moveToElementEditStart( nextBlock );
        }
        else
        {
          var newBlock,
            newBlockDir;
  
          if ( previousBlock )
          {
            // Do not enter this block if it's a header tag, or we are in
            // a Shift+Enter (#77). Create a new block element instead
            // (later in the code).
            if ( previousBlock.is( 'li' ) ||
                ! ( headerTagRegex.test( previousBlock.getName() ) || previousBlock.is( 'pre' ) ) )
            {
              // Otherwise, duplicate the previous block.
              newBlock = previousBlock.clone();
            }
          }
          else if ( nextBlock )
            newBlock = nextBlock.clone();
  
          if ( !newBlock )
          {
            // We have already created a new list item. (#6849)
            if ( node && node.is( 'li' ) )
              newBlock = node;
            else
            {
              newBlock = doc.createElement( blockTag );
              if ( previousBlock && ( newBlockDir = previousBlock.getDirection() ) )
                newBlock.setAttribute( 'dir', newBlockDir );
            }
          }
          // Force the enter block unless we're talking of a list item.
          else if ( forceMode && !newBlock.is( 'li' ) )
            newBlock.renameNode( blockTag );
  
          // Recreate the inline elements tree, which was available
          // before hitting enter, so the same styles will be available in
          // the new block.
          var elementPath = splitInfo.elementPath;
          if ( elementPath )
          {
            for ( var i = 0, len = elementPath.elements.length ; i < len ; i++ )
            {
              var element = elementPath.elements[ i ];
  
              if ( element.equals( elementPath.block ) || element.equals( elementPath.blockLimit ) )
                break;
  
              if ( CKEDITOR.dtd.$removeEmpty[ element.getName() ] )
              {
                element = element.clone();
                newBlock.moveChildren( element );
                newBlock.append( element );
              }
            }
          }
  
          if ( !CKEDITOR.env.ie )
            newBlock.appendBogus();
  
          if ( !newBlock.getParent() )
            range.insertNode( newBlock );
  
          // list item start number should not be duplicated (#7330), but we need
          // to remove the attribute after it's onto the DOM tree because of old IEs (#7581).
          newBlock.is( 'li' ) && newBlock.removeAttribute( 'value' );
  
          // This is tricky, but to make the new block visible correctly
          // we must select it.
          // The previousBlock check has been included because it may be
          // empty if we have fixed a block-less space (like ENTER into an
          // empty table cell).
          if ( CKEDITOR.env.ie && isStartOfBlock && ( !isEndOfBlock || !previousBlock.getChildCount() ) )
          {
            // Move the selection to the new block.
            range.moveToElementEditStart( isEndOfBlock ? previousBlock : newBlock );
            range.select();
          }
  
          // Move the selection to the new block.
          range.moveToElementEditStart( isStartOfBlock && !isEndOfBlock ? nextBlock : newBlock );
      }
  
        if ( !CKEDITOR.env.ie )
        {
          if ( nextBlock )
          {
            // If we have split the block, adds a temporary span at the
            // range position and scroll relatively to it.
            var tmpNode = doc.createElement( 'span' );
  
            // We need some content for Safari.
            tmpNode.setHtml( '&nbsp;' );
  
            range.insertNode( tmpNode );
            tmpNode.scrollIntoView();
            range.deleteContents();
          }
          else
          {
            // We may use the above scroll logic for the new block case
            // too, but it gives some weird result with Opera.
            newBlock.scrollIntoView();
          }
        }
  
        range.select();
      },
  
      enterBr : function( editor, mode, range, forceMode )
      {
        // Get the range for the current selection.
        range = range || getRange( editor );
  
        // We may not have valid ranges to work on, like when inside a
        // contenteditable=false element.
        if ( !range )
          return;
  
        var doc = range.document;
  
        // Determine the block element to be used.
        var blockTag = ( mode == CKEDITOR.ENTER_DIV ? 'div' : 'p' );
  
        var isEndOfBlock = range.checkEndOfBlock();
  
        var elementPath = new CKEDITOR.dom.elementPath( editor.getSelection().getStartElement() );
  
        var startBlock = elementPath.block,
          startBlockTag = startBlock && elementPath.block.getName();
  
        var isPre = false;
  
        if ( !forceMode && startBlockTag == 'li' )
        {
          enterBlock( editor, mode, range, forceMode );
          return;
        }
  
        // If we are at the end of a header block.
        if ( !forceMode && isEndOfBlock && headerTagRegex.test( startBlockTag ) )
        {
          var newBlock,
            newBlockDir;
  
          if ( ( newBlockDir = startBlock.getDirection() ) )
          {
            newBlock = doc.createElement( 'div' );
            newBlock.setAttribute( 'dir', newBlockDir );
            newBlock.insertAfter( startBlock );
            range.setStart( newBlock, 0 );
          }
          else
          {
            // Insert a <br> after the current paragraph.
            doc.createElement( 'br' ).insertAfter( startBlock );
  
            // A text node is required by Gecko only to make the cursor blink.
            if ( CKEDITOR.env.gecko )
              doc.createText( '' ).insertAfter( startBlock );
  
            // IE has different behaviors regarding position.
            range.setStartAt( startBlock.getNext(), CKEDITOR.env.ie ? CKEDITOR.POSITION_BEFORE_START : CKEDITOR.POSITION_AFTER_START );
          }
        }
        else
        {
          var lineBreak;
  
          isPre = ( startBlockTag == 'pre' );
  
          // Gecko prefers <br> as line-break inside <pre> (#4711).
          if ( isPre && !CKEDITOR.env.gecko )
            lineBreak = doc.createText( CKEDITOR.env.ie ? '\r' : '\n' );
          else
            lineBreak = doc.createElement( 'br' );
  
          range.deleteContents();
          range.insertNode( lineBreak );
  
          // IE has different behavior regarding position.
          if ( CKEDITOR.env.ie )
            range.setStartAt( lineBreak, CKEDITOR.POSITION_AFTER_END );
          else
          {
            // A text node is required by Gecko only to make the cursor blink.
            // We need some text inside of it, so the bogus <br> is properly
            // created.
            doc.createText( '\ufeff' ).insertAfter( lineBreak );
  
            // If we are at the end of a block, we must be sure the bogus node is available in that block.
            if ( isEndOfBlock )
              lineBreak.getParent().appendBogus();
  
            // Now we can remove the text node contents, so the caret doesn't
            // stop on it.
            lineBreak.getNext().$.nodeValue = '';
  
            range.setStartAt( lineBreak.getNext(), CKEDITOR.POSITION_AFTER_START );
  
            // Scroll into view, for non IE.
            var dummy = null;
  
            // BR is not positioned in Opera and Webkit.
            if ( !CKEDITOR.env.gecko )
            {
              dummy = doc.createElement( 'span' );
              // We need have some contents for Webkit to position it
              // under parent node. ( #3681)
              dummy.setHtml('&nbsp;');
            }
            else
              dummy = doc.createElement( 'br' );
  
            dummy.insertBefore( lineBreak.getNext() );
            dummy.scrollIntoView();
            dummy.remove();
          }
        }
  
        // This collapse guarantees the cursor will be blinking.
        range.collapse( true );
  
        range.select( isPre );
      }
    };
  
    var plugin = CKEDITOR.plugins.enterkey,
      enterBr = plugin.enterBr,
      enterBlock = plugin.enterBlock,
      headerTagRegex = /^h[1-6]$/;
  
    function shiftEnter( editor )
    {
      // Only effective within document.
      if ( editor.mode != 'wysiwyg' )
        return false;
  
      // On SHIFT+ENTER:
      // 1. We want to enforce the mode to be respected, instead
      // of cloning the current block. (#77)
      return enter( editor, editor.config.shiftEnterMode, 1 );
    }
  
    function enter( editor, mode, forceMode )
    {
      forceMode = editor.config.forceEnterMode || forceMode;
  
      // Only effective within document.
      if ( editor.mode != 'wysiwyg' )
        return false;
  
      if ( !mode )
        mode = editor.config.enterMode;
  
      // Use setTimout so the keys get cancelled immediatelly.
      setTimeout( function()
        {
          editor.fire( 'saveSnapshot' );  // Save undo step.
  
          if ( mode == CKEDITOR.ENTER_BR )
            enterBr( editor, mode, null, forceMode );
          else
            enterBlock( editor, mode, null, forceMode );
  
          editor.fire( 'saveSnapshot' );
  
        }, 0 );
  
      return true;
    }
  
    function getRange( editor )
    {
      // Get the selection ranges.
      var ranges = editor.getSelection().getRanges( true );
  
      // Delete the contents of all ranges except the first one.
      for ( var i = ranges.length - 1 ; i > 0 ; i-- )
      {
        ranges[ i ].deleteContents();
      }
  
      // Return the first range.
      return ranges[ 0 ];
    }
  })();
  