/**
* Write slide relationships to XML format
*
* @param PHPPowerPoint_Slide $pSlide
* @return string XML Output
* @throws Exception
*/
public function writeSlideRelationships(PHPPowerPoint_Slide $pSlide = null)
{
// Create XML writer
$objWriter = null;
if ($this->getParentWriter()->getUseDiskCaching()) {
$objWriter = new PHPPowerPoint_Shared_XMLWriter(PHPPowerPoint_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
} else {
$objWriter = new PHPPowerPoint_Shared_XMLWriter(PHPPowerPoint_Shared_XMLWriter::STORAGE_MEMORY);
}
// XML header
$objWriter->startDocument('1.0', 'UTF-8', 'yes');
// Relationships
$objWriter->startElement('Relationships');
$objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/package/2006/relationships');
// Starting relation id
$relId = 1;
// Write slideLayout relationship
$layoutPack = $this->getParentWriter()->getLayoutPack();
$layoutIndex = $layoutPack->findlayoutIndex($pSlide->getSlideLayout(), $pSlide->getSlideMasterId());
$this->_writeRelationship($objWriter, $relId++, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideLayout', '../slideLayouts/slideLayout' . ($layoutIndex + 1) . '.xml');
// Write drawing relationships?
if ($pSlide->getShapeCollection()->count() > 0) {
// Loop trough images and write relationships
$iterator = $pSlide->getShapeCollection()->getIterator();
while ($iterator->valid()) {
if ($iterator->current() instanceof PHPPowerPoint_Shape_Drawing || $iterator->current() instanceof PHPPowerPoint_Shape_MemoryDrawing) {
// Write relationship for image drawing
$this->_writeRelationship($objWriter, $relId, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/image', '../media/' . str_replace(' ', '_', $iterator->current()->getIndexedFilename()));
$iterator->current()->__relationId = 'rId' . $relId;
++$relId;
} elseif ($iterator->current() instanceof PHPPowerPoint_Shape_Chart) {
// Write relationship for chart drawing
$this->_writeRelationship($objWriter, $relId, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/chart', '../charts/' . $iterator->current()->getIndexedFilename());
$iterator->current()->__relationId = 'rId' . $relId;
++$relId;
}
$iterator->next();
}
}
// Write hyperlink relationships?
if ($pSlide->getShapeCollection()->count() > 0) {
// Loop trough hyperlinks and write relationships
$iterator = $pSlide->getShapeCollection()->getIterator();
while ($iterator->valid()) {
// Hyperlink on shape
if ($iterator->current()->hasHyperlink()) {
// Write relationship for hyperlink
$hyperlink = $iterator->current()->getHyperlink();
$hyperlink->__relationId = 'rId' . $relId;
if (!$hyperlink->isInternal()) {
$this->_writeRelationship($objWriter, $relId, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink', $hyperlink->getUrl(), 'External');
} else {
$this->_writeRelationship($objWriter, $relId, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide', 'slide' . $hyperlink->getSlideNumber() . '.xml');
}
++$relId;
}
// Hyperlink on rich text run
if ($iterator->current() instanceof PHPPowerPoint_Shape_RichText) {
foreach ($iterator->current()->getParagraphs() as $paragraph) {
foreach ($paragraph->getRichTextElements() as $element) {
if ($element instanceof PHPPowerPoint_Shape_RichText_Run || $element instanceof PHPPowerPoint_Shape_RichText_TextElement) {
if ($element->hasHyperlink()) {
// Write relationship for hyperlink
$hyperlink = $element->getHyperlink();
$hyperlink->__relationId = 'rId' . $relId;
if (!$hyperlink->isInternal()) {
$this->_writeRelationship($objWriter, $relId, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink', $hyperlink->getUrl(), 'External');
} else {
$this->_writeRelationship($objWriter, $relId, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide', 'slide' . $hyperlink->getSlideNumber() . '.xml');
}
++$relId;
}
}
}
}
}
$iterator->next();
}
}
$objWriter->endElement();
// Return
return $objWriter->getData();
}
