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<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2013 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_Writer_Excel2007
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version    ##VERSION##, ##DATE##
 */


/**
 * PHPExcel_Writer_Excel2007_Comments
 *
 * @category   PHPExcel
 * @package    PHPExcel_Writer_Excel2007
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Writer_Excel2007_Comments extends PHPExcel_Writer_Excel2007_WriterPart
{
        /**
         * Write comments to XML format
         *
         * @param       PHPExcel_Worksheet                              $pWorksheet
         * @return      string                                                          XML Output
         * @throws      PHPExcel_Writer_Exception
         */
        public function writeComments(PHPExcel_Worksheet $pWorksheet = null)
        {
                // Create XML writer
                $objWriter = null;
                if ($this->getParentWriter()->getUseDiskCaching()) {
                        $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
                } else {
                        $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
                }

                // XML header
                $objWriter->startDocument('1.0','UTF-8','yes');

                // Comments cache
                $comments       = $pWorksheet->getComments();

                // Authors cache
                $authors        = array();
                $authorId       = 0;
                foreach ($comments as $comment) {
                        if (!isset($authors[$comment->getAuthor()])) {
                                $authors[$comment->getAuthor()] = $authorId++;
                        }
                }

                // comments
                $objWriter->startElement('comments');
                $objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/spreadsheetml/2006/main');

                        // Loop through authors
                        $objWriter->startElement('authors');
                        foreach ($authors as $author => $index) {
                                $objWriter->writeElement('author', $author);
                        }
                        $objWriter->endElement();

                        // Loop through comments
                        $objWriter->startElement('commentList');
                        foreach ($comments as $key => $value) {
                                $this->_writeComment($objWriter, $key, $value, $authors);
                        }
                        $objWriter->endElement();

                $objWriter->endElement();

                // Return
                return $objWriter->getData();
        }

        /**
         * Write comment to XML format
         *
         * @param       PHPExcel_Shared_XMLWriter               $objWriter                      XML Writer
         * @param       string                                                  $pCellReference         Cell reference
         * @param       PHPExcel_Comment                                $pComment                       Comment
         * @param       array                                                   $pAuthors                       Array of authors
         * @throws      PHPExcel_Writer_Exception
         */
        public function _writeComment(PHPExcel_Shared_XMLWriter $objWriter = null, $pCellReference = 'A1', PHPExcel_Comment $pComment = null, $pAuthors = null)
        {
                // comment
                $objWriter->startElement('comment');
                $objWriter->writeAttribute('ref',               $pCellReference);
                $objWriter->writeAttribute('authorId',  $pAuthors[$pComment->getAuthor()]);

                        // text
                        $objWriter->startElement('text');
                        $this->getParentWriter()->getWriterPart('stringtable')->writeRichText($objWriter, $pComment->getText());
                        $objWriter->endElement();

                $objWriter->endElement();
        }

        /**
         * Write VML comments to XML format
         *
         * @param       PHPExcel_Worksheet                              $pWorksheet
         * @return      string                                                          XML Output
         * @throws      PHPExcel_Writer_Exception
         */
        public function writeVMLComments(PHPExcel_Worksheet $pWorksheet = null)
        {
                // Create XML writer
                $objWriter = null;
                if ($this->getParentWriter()->getUseDiskCaching()) {
                        $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
                } else {
                        $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
                }

                // XML header
                $objWriter->startDocument('1.0','UTF-8','yes');

                // Comments cache
                $comments       = $pWorksheet->getComments();

                // xml
                $objWriter->startElement('xml');
                $objWriter->writeAttribute('xmlns:v', 'urn:schemas-microsoft-com:vml');
                $objWriter->writeAttribute('xmlns:o', 'urn:schemas-microsoft-com:office:office');
                $objWriter->writeAttribute('xmlns:x', 'urn:schemas-microsoft-com:office:excel');

                        // o:shapelayout
                        $objWriter->startElement('o:shapelayout');
                        $objWriter->writeAttribute('v:ext',             'edit');

                                // o:idmap
                                $objWriter->startElement('o:idmap');
                                $objWriter->writeAttribute('v:ext',     'edit');
                                $objWriter->writeAttribute('data',              '1');
                                $objWriter->endElement();

                        $objWriter->endElement();

                        // v:shapetype
                        $objWriter->startElement('v:shapetype');
                        $objWriter->writeAttribute('id',                '_x0000_t202');
                        $objWriter->writeAttribute('coordsize', '21600,21600');
                        $objWriter->writeAttribute('o:spt',     '202');
                        $objWriter->writeAttribute('path',              'm,l,21600r21600,l21600,xe');

                                // v:stroke
                                $objWriter->startElement('v:stroke');
                                $objWriter->writeAttribute('joinstyle',         'miter');
                                $objWriter->endElement();

                                // v:path
                                $objWriter->startElement('v:path');
                                $objWriter->writeAttribute('gradientshapeok',   't');
                                $objWriter->writeAttribute('o:connecttype',     'rect');
                                $objWriter->endElement();

                        $objWriter->endElement();

                        // Loop through comments
                        foreach ($comments as $key => $value) {
                                $this->_writeVMLComment($objWriter, $key, $value);
                        }

                $objWriter->endElement();

                // Return
                return $objWriter->getData();
        }

        /**
         * Write VML comment to XML format
         *
         * @param       PHPExcel_Shared_XMLWriter               $objWriter                      XML Writer
         * @param       string                                                  $pCellReference         Cell reference
         * @param       PHPExcel_Comment                                $pComment                       Comment
         * @throws      PHPExcel_Writer_Exception
         */
        public function _writeVMLComment(PHPExcel_Shared_XMLWriter $objWriter = null, $pCellReference = 'A1', PHPExcel_Comment $pComment = null)
        {
                // Metadata
                list($column, $row) = PHPExcel_Cell::coordinateFromString($pCellReference);
                $column = PHPExcel_Cell::columnIndexFromString($column);
                $id = 1024 + $column + $row;
                $id = substr($id, 0, 4);

                // v:shape
                $objWriter->startElement('v:shape');
                $objWriter->writeAttribute('id',                        '_x0000_s' . $id);
                $objWriter->writeAttribute('type',                      '#_x0000_t202');
                $objWriter->writeAttribute('style',             'position:absolute;margin-left:' . $pComment->getMarginLeft() . ';margin-top:' . $pComment->getMarginTop() . ';width:' . $pComment->getWidth() . ';height:' . $pComment->getHeight() . ';z-index:1;visibility:' . ($pComment->getVisible() ? 'visible' : 'hidden'));
                $objWriter->writeAttribute('fillcolor',         '#' . $pComment->getFillColor()->getRGB());
                $objWriter->writeAttribute('o:insetmode',       'auto');

                        // v:fill
                        $objWriter->startElement('v:fill');
                        $objWriter->writeAttribute('color2',            '#' . $pComment->getFillColor()->getRGB());
                        $objWriter->endElement();

                        // v:shadow
                        $objWriter->startElement('v:shadow');
                        $objWriter->writeAttribute('on',                        't');
                        $objWriter->writeAttribute('color',             'black');
                        $objWriter->writeAttribute('obscured',          't');
                        $objWriter->endElement();

                        // v:path
                        $objWriter->startElement('v:path');
                        $objWriter->writeAttribute('o:connecttype', 'none');
                        $objWriter->endElement();

                        // v:textbox
                        $objWriter->startElement('v:textbox');
                        $objWriter->writeAttribute('style', 'mso-direction-alt:auto');

                                // div
                                $objWriter->startElement('div');
                                $objWriter->writeAttribute('style', 'text-align:left');
                                $objWriter->endElement();

                        $objWriter->endElement();

                        // x:ClientData
                        $objWriter->startElement('x:ClientData');
                        $objWriter->writeAttribute('ObjectType', 'Note');

                                // x:MoveWithCells
                                $objWriter->writeElement('x:MoveWithCells', '');

                                // x:SizeWithCells
                                $objWriter->writeElement('x:SizeWithCells', '');

                                // x:Anchor
                                //$objWriter->writeElement('x:Anchor', $column . ', 15, ' . ($row - 2) . ', 10, ' . ($column + 4) . ', 15, ' . ($row + 5) . ', 18');

                                // x:AutoFill
                                $objWriter->writeElement('x:AutoFill', 'False');

                                // x:Row
                                $objWriter->writeElement('x:Row', ($row - 1));

                                // x:Column
                                $objWriter->writeElement('x:Column', ($column - 1));

                        $objWriter->endElement();

                $objWriter->endElement();
        }
}