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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_StringTable
 *
 * @category   PHPExcel
 * @package    PHPExcel_Writer_Excel2007
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Writer_Excel2007_StringTable extends PHPExcel_Writer_Excel2007_WriterPart
{
        /**
         * Create worksheet stringtable
         *
         * @param       PHPExcel_Worksheet      $pSheet                         Worksheet
         * @param       string[]                                $pExistingTable         Existing table to eventually merge with
         * @return      string[]                                String table for worksheet
         * @throws      PHPExcel_Writer_Exception
         */
        public function createStringTable($pSheet = null, $pExistingTable = null)
        {
                if ($pSheet !== NULL) {
                        // Create string lookup table
                        $aStringTable = array();
                        $cellCollection = null;
                        $aFlippedStringTable = null;    // For faster lookup

                        // Is an existing table given?
                        if (($pExistingTable !== NULL) && is_array($pExistingTable)) {
                                $aStringTable = $pExistingTable;
                        }

                        // Fill index array
                        $aFlippedStringTable = $this->flipStringTable($aStringTable);

                        // Loop through cells
                        foreach ($pSheet->getCellCollection() as $cellID) {
                                $cell = $pSheet->getCell($cellID);
                                $cellValue = $cell->getValue();
                                if (!is_object($cellValue) &&
                                        ($cellValue !== NULL) &&
                                        $cellValue !== '' &&
                                        !isset($aFlippedStringTable[$cellValue]) &&
                                        ($cell->getDataType() == PHPExcel_Cell_DataType::TYPE_STRING || $cell->getDataType() == PHPExcel_Cell_DataType::TYPE_STRING2 || $cell->getDataType() == PHPExcel_Cell_DataType::TYPE_NULL)) {
                                                $aStringTable[] = $cellValue;
                                                $aFlippedStringTable[$cellValue] = true;
                                } elseif ($cellValue instanceof PHPExcel_RichText &&
                                                  ($cellValue !== NULL) &&
                                                  !isset($aFlippedStringTable[$cellValue->getHashCode()])) {
                                                                $aStringTable[] = $cellValue;
                                                                $aFlippedStringTable[$cellValue->getHashCode()] = true;
                        }
                }

                // Return
                return $aStringTable;
                } else {
                        throw new PHPExcel_Writer_Exception("Invalid PHPExcel_Worksheet object passed.");
                }
        }

        /**
         * Write string table to XML format
         *
         * @param       string[]        $pStringTable
         * @return      string          XML Output
         * @throws      PHPExcel_Writer_Exception
         */
        public function writeStringTable($pStringTable = null)
        {
                if ($pStringTable !== 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');

                        // String table
                        $objWriter->startElement('sst');
                        $objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/spreadsheetml/2006/main');
                        $objWriter->writeAttribute('uniqueCount', count($pStringTable));

                                // Loop through string table
                                foreach ($pStringTable as $textElement) {
                                        $objWriter->startElement('si');

                                                if (! $textElement instanceof PHPExcel_RichText) {
                                                        $textToWrite = PHPExcel_Shared_String::ControlCharacterPHP2OOXML( $textElement );
                                                        $objWriter->startElement('t');
                                                        if ($textToWrite !== trim($textToWrite)) {
                                                                $objWriter->writeAttribute('xml:space', 'preserve');
                                                        }
                                                        $objWriter->writeRawData($textToWrite);
                                                        $objWriter->endElement();
                                                } else if ($textElement instanceof PHPExcel_RichText) {
                                                        $this->writeRichText($objWriter, $textElement);
                                                }

                    $objWriter->endElement();
                                }

                        $objWriter->endElement();

                        // Return
                        return $objWriter->getData();
                } else {
                        throw new PHPExcel_Writer_Exception("Invalid string table array passed.");
                }
        }

        /**
         * Write Rich Text
         *
         * @param       PHPExcel_Shared_XMLWriter       $objWriter              XML Writer
         * @param       PHPExcel_RichText                       $pRichText              Rich text
         * @param       string                                          $prefix                 Optional Namespace prefix
         * @throws      PHPExcel_Writer_Exception
         */
        public function writeRichText(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_RichText $pRichText = null, $prefix=NULL)
        {
                if ($prefix !== NULL)
                        $prefix .= ':';
                // Loop through rich text elements
                $elements = $pRichText->getRichTextElements();
                foreach ($elements as $element) {
                        // r
                        $objWriter->startElement($prefix.'r');

                                // rPr
                                if ($element instanceof PHPExcel_RichText_Run) {
                                        // rPr
                                        $objWriter->startElement($prefix.'rPr');

                                                // rFont
                                                $objWriter->startElement($prefix.'rFont');
                                                $objWriter->writeAttribute('val', $element->getFont()->getName());
                                                $objWriter->endElement();

                                                // Bold
                                                $objWriter->startElement($prefix.'b');
                                                $objWriter->writeAttribute('val', ($element->getFont()->getBold() ? 'true' : 'false'));
                                                $objWriter->endElement();

                                                // Italic
                                                $objWriter->startElement($prefix.'i');
                                                $objWriter->writeAttribute('val', ($element->getFont()->getItalic() ? 'true' : 'false'));
                                                $objWriter->endElement();

                                                // Superscript / subscript
                                                if ($element->getFont()->getSuperScript() || $element->getFont()->getSubScript()) {
                                                        $objWriter->startElement($prefix.'vertAlign');
                                                        if ($element->getFont()->getSuperScript()) {
                                                                $objWriter->writeAttribute('val', 'superscript');
                                                        } else if ($element->getFont()->getSubScript()) {
                                                                $objWriter->writeAttribute('val', 'subscript');
                                                        }
                                                        $objWriter->endElement();
                                                }

                                                // Strikethrough
                                                $objWriter->startElement($prefix.'strike');
                                                $objWriter->writeAttribute('val', ($element->getFont()->getStrikethrough() ? 'true' : 'false'));
                                                $objWriter->endElement();

                                                // Color
                                                $objWriter->startElement($prefix.'color');
                                                $objWriter->writeAttribute('rgb', $element->getFont()->getColor()->getARGB());
                                                $objWriter->endElement();

                                                // Size
                                                $objWriter->startElement($prefix.'sz');
                                                $objWriter->writeAttribute('val', $element->getFont()->getSize());
                                                $objWriter->endElement();

                                                // Underline
                                                $objWriter->startElement($prefix.'u');
                                                $objWriter->writeAttribute('val', $element->getFont()->getUnderline());
                                                $objWriter->endElement();

                                        $objWriter->endElement();
                                }

                                // t
                                $objWriter->startElement($prefix.'t');
                                $objWriter->writeAttribute('xml:space', 'preserve');
                                $objWriter->writeRawData(PHPExcel_Shared_String::ControlCharacterPHP2OOXML( $element->getText() ));
                                $objWriter->endElement();

                        $objWriter->endElement();
                }
        }

        /**
         * Write Rich Text
         *
         * @param       PHPExcel_Shared_XMLWriter       $objWriter              XML Writer
         * @param       string|PHPExcel_RichText        $pRichText              text string or Rich text
         * @param       string                                          $prefix                 Optional Namespace prefix
         * @throws      PHPExcel_Writer_Exception
         */
        public function writeRichTextForCharts(PHPExcel_Shared_XMLWriter $objWriter = null, $pRichText = null, $prefix=NULL)
        {
                if (!$pRichText instanceof PHPExcel_RichText) {
                        $textRun = $pRichText;
                        $pRichText = new PHPExcel_RichText();
                        $pRichText->createTextRun($textRun);
                }

                if ($prefix !== NULL)
                        $prefix .= ':';
                // Loop through rich text elements
                $elements = $pRichText->getRichTextElements();
                foreach ($elements as $element) {
                        // r
                        $objWriter->startElement($prefix.'r');

                                // rPr
                                $objWriter->startElement($prefix.'rPr');

                                        // Bold
                                        $objWriter->writeAttribute('b', ($element->getFont()->getBold() ? 1 : 0));
                                        // Italic
                                        $objWriter->writeAttribute('i', ($element->getFont()->getItalic() ? 1 : 0));
                                        // Underline
                                        $underlineType = $element->getFont()->getUnderline();
                                        switch($underlineType) {
                                                case 'single' :
                                                        $underlineType = 'sng';
                                                        break;
                                                case 'double' :
                                                        $underlineType = 'dbl';
                                                        break;
                                        }
                                        $objWriter->writeAttribute('u', $underlineType);
                                        // Strikethrough
                                        $objWriter->writeAttribute('strike', ($element->getFont()->getStrikethrough() ? 'sngStrike' : 'noStrike'));

                                        // rFont
                                        $objWriter->startElement($prefix.'latin');
                                                $objWriter->writeAttribute('typeface', $element->getFont()->getName());
                                        $objWriter->endElement();

                                        // Superscript / subscript
//                                      if ($element->getFont()->getSuperScript() || $element->getFont()->getSubScript()) {
//                                              $objWriter->startElement($prefix.'vertAlign');
//                                              if ($element->getFont()->getSuperScript()) {
//                                                      $objWriter->writeAttribute('val', 'superscript');
//                                              } else if ($element->getFont()->getSubScript()) {
//                                                      $objWriter->writeAttribute('val', 'subscript');
//                                              }
//                                              $objWriter->endElement();
//                                      }
//
                                $objWriter->endElement();

                                // t
                                $objWriter->startElement($prefix.'t');
//                                      $objWriter->writeAttribute('xml:space', 'preserve');    //      Excel2010 accepts, Excel2007 complains
                                        $objWriter->writeRawData(PHPExcel_Shared_String::ControlCharacterPHP2OOXML( $element->getText() ));
                                $objWriter->endElement();

                        $objWriter->endElement();
                }
        }

        /**
         * Flip string table (for index searching)
         *
         * @param       array   $stringTable    Stringtable
         * @return      array
         */
        public function flipStringTable($stringTable = array()) {
                // Return value
                $returnValue = array();

                // Loop through stringtable and add flipped items to $returnValue
                foreach ($stringTable as $key => $value) {
                        if (! $value instanceof PHPExcel_RichText) {
                                $returnValue[$value] = $key;
                        } else if ($value instanceof PHPExcel_RichText) {
                                $returnValue[$value->getHashCode()] = $key;
                        }
                }

                // Return
                return $returnValue;
        }
}