/**
* Render a media object.
*
* @param ezcDocumentPdfPage $page
* @param ezcDocumentPdfHyphenator $hyphenator
* @param ezcDocumentPdfTokenizer $tokenizer
* @param ezcDocumentLocateableDomElement $media
* @param ezcDocumentPdfMainRenderer $mainRenderer
* @return bool
*/
public function renderNode(ezcDocumentPdfPage $page, ezcDocumentPdfHyphenator $hyphenator, ezcDocumentPdfTokenizer $tokenizer, ezcDocumentLocateableDomElement $media, ezcDocumentPdfMainRenderer $mainRenderer)
{
// Inference page styles
$styles = $this->styles->inferenceFormattingRules($media);
// Locate image file
$imageData = $media->getElementsByTagName('imagedata')->item(0);
$imageFile = $mainRenderer->locateFile((string) $imageData->getAttribute('fileref'));
$image = ezcDocumentPdfImage::createFromFile($imageFile);
// Estimate size of image box
$width = $this->getMediaBoxWidth($styles, $page, $image);
// Get available height with the estimated width
$dimensions = $this->scaleImage($styles, $image, $page, $width);
$switchBack = false;
if (($space = $page->testFitRectangle($page->x, $page->y, $dimensions[0], $dimensions[1])) === false) {
// Image with estimated dimensions does not fit on current page any
// more.
$page = $mainRenderer->getNextRenderingPosition(($pWidth = $width->get()) + $styles['text-column-spacing']->value, $pWidth);
$switchBack = true;
}
// Get maximum available space
$space = $page->testFitRectangle($page->x, $page->y, $width->get(), null);
// Apply margin of mediaobject
$space->x += $styles['margin']->value['left'];
$space->y += $styles['margin']->value['top'];
$space->width -= $styles['margin']->value['left'] + $styles['margin']->value['right'];
$space->height -= $styles['margin']->value['top'] + $styles['margin']->value['bottom'];
// Estimate required height of text blocks
$captions = $media->getElementsByTagName('caption');
$captionHeight = 0;
$textRenderer = new ezcDocumentPdfTextBlockRenderer($this->driver, $this->styles);
foreach ($captions as $caption) {
$captionHeight += $textRenderer->estimateHeight($space->width, $hyphenator, $tokenizer, $caption);
}
if (($imageHeight = $space->height - $captionHeight) < 0) {
return false;
}
// Reduce the image size, of it does not fit any more because of the captions
if ($imageHeight < $dimensions[1]) {
$dimensions[0] *= $imageHeight / $dimensions[1];
$dimensions[1] = $imageHeight;
}
// Render image
$this->driver->drawImage($imageFile, $image->getMimeType(), $space->x + ($space->width - $dimensions[0]) / 2, $space->y, $dimensions[0], $dimensions[1]);
$space->y += $dimensions[1];
// Render captions
foreach ($captions as $caption) {
$space->y += $textRenderer->renderBlock($space, $hyphenator, $tokenizer, $caption);
}
// Set covered space covered
$page->setCovered(new ezcDocumentPdfBoundingBox($page->x, $page->y, $space->width, $space->y - $page->y));
$page->y = $space->y;
// Go back to previous page, if requested
if ($switchBack) {
$this->driver->goBackOnePage();
}
return true;
}
/**
* Render a single text box
*
* All markup inside of the given string is considered inline markup (in
* CSS terms). Inline markup should be given as common docbook inline
* markup, like <emphasis>.
*
* Returns a boolean indicator whether the rendering of the full text
* in the available space succeeded or not.
*
* @param ezcDocumentPdfPage $page
* @param ezcDocumentPdfHyphenator $hyphenator
* @param ezcDocumentPdfTokenizer $tokenizer
* @param ezcDocumentLocateableDomElement $text
* @param ezcDocumentPdfMainRenderer $mainRenderer
* @return bool
*
* @todo This method does not respect changes in the available text width,
* if a paragraph is wrapped to the next page. This would require token
* reordering, which is not implemented yet.
*/
public function renderNode(ezcDocumentPdfPage $page, ezcDocumentPdfHyphenator $hyphenator, ezcDocumentPdfTokenizer $tokenizer, ezcDocumentLocateableDomElement $text, ezcDocumentPdfMainRenderer $mainRenderer)
{
// Inference page styles
$styles = $this->styles->inferenceFormattingRules($text);
$width = $mainRenderer->calculateTextWidth($page, $text);
// Evaluate available space
if (($space = $this->evaluateAvailableBoundingBox($page, $styles, $width)) === false) {
return false;
}
// Iterate over tokens and try to fit them in the current line, use
// hyphenator to split words.
$tokens = $this->tokenize($text, $tokenizer);
$lines = $this->fitTokensInLines($tokens, $hyphenator, $space->width);
// Transaction wrapping around temporary page creations
$transaction = $this->driver->startTransaction();
$lineCount = count($lines);
$current = 0;
$position = $space->y;
$pageNr = 0;
$wrap = false;
$pages = array($pageNr => array('page' => $page, 'lines' => array(), 'space' => $space));
for ($line = 0; $line < $lineCount; ++$line) {
// Render on current page, of there is still enough space
if (!$wrap && $position + $lines[$line]['height'] < $pages[$pageNr]['space']->y + $pages[$pageNr]['space']->height) {
++$current;
// Check widows, if we are at the last line
if ($line === $lineCount - 1 && $current < $styles['widows']->value && $lineCount >= $styles['widows']->value) {
$difference = $styles['widows']->value - $current;
$pages[$pageNr - 1]['lines'] = array_slice($pages[$pageNr - 1]['lines'], 0, -$difference, true);
$pages[$pageNr]['lines'] = array();
$line = $lineCount - $styles['widows']->value - 1;
$current = 0;
continue;
}
$pages[$pageNr]['lines'][] = array('position' => $position, 'line' => $lines[$line]);
$position += $lines[$line]['height'] * $styles['line-height']->value;
continue;
}
// Shift to next page
$pages[++$pageNr] = array('page' => $tmpPage = $mainRenderer->getNextRenderingPosition(($pWidth = $mainRenderer->calculateTextWidth($page, $text)) + $styles['text-column-spacing']->value, $pWidth), 'lines' => array(), 'space' => $this->evaluateAvailableBoundingBox($tmpPage, $styles, $width));
$position = $pages[$pageNr]['space']->y;
$current = 0;
$wrap = false;
// Handle orphans
if ($line < $styles['orphans']->value && $line < $lineCount) {
$pages[0]['lines'] = array();
$line = -1;
continue;
}
--$line;
}
$this->driver->revert($transaction);
// Render lines
$lineNr = 0;
foreach ($pages as $nr => $content) {
if ($nr > 0) {
// Get next rendering position
$page = $mainRenderer->getNextRenderingPosition(($pWidth = $mainRenderer->calculateTextWidth($page, $text)) + $styles['text-column-spacing']->value, $pWidth);
}
if (!count($content['lines'])) {
continue;
}
// Render background & border
$space = $content['space'];
$lastLine = end($content['lines']);
$space->height = $lastLine['position'] + $lastLine['line']['height'] - $space->y;
$this->renderBoxBackground($space, $styles);
$this->renderBoxBorder($space, $styles, $nr === 0, $nr + 1 >= count($pages));
$this->setBoxCovered($page, $space, $styles);
// Render actual text contents
foreach ($content['lines'] as $line) {
$this->renderLine($line['position'], $lineNr++, $line['line'], $space, $styles);
}
}
return true;
}
/**
* Get next rendering position.
*
* If the current space has been exceeded this method calculates
* a new rendering position, optionally creates a new page for
* this, or switches to the next column. The new rendering;
* position is set on the returned page object.
*
* As the parameter you need to pass the required width for the object to
* place on the page.
*
* @param float $move
* @param float $width
* @return ezcDocumentPdfPage
*/
public function getNextRenderingPosition($move, $width)
{
// Close all table cells
$oldPage = $this->driver->currentPage();
foreach ($this->cellBoxes as $nr => $cell) {
if (isset($this->additionalBorders[$oldPage->orderedId]) && isset($this->additionalBorders[$oldPage->orderedId][$nr])) {
continue;
}
$cell['box']->height = $oldPage->startY + $oldPage->innerHeight - $cell['box']->y;
$this->additionalBorders[$oldPage->orderedId][$nr] = array(clone $cell['box'], $cell['styles'], false);
}
// Close table border
if (!isset($this->additionalBorders[$oldPage->orderedId]) || !isset($this->additionalBorders[$oldPage->orderedId]['table'])) {
$this->tableBox['box']->height = $oldPage->startY + $oldPage->innerHeight - $this->tableBox['box']->y;
$this->additionalBorders[$oldPage->orderedId]['table'] = array(clone $this->tableBox['box'], $this->tableBox['styles'], false, false);
}
// Call parent handler to get next rendering position
$page = parent::getNextRenderingPosition($move, $width);
if ($page === $oldPage) {
$this->lastPageForCell = $page;
return $page;
}
// Update all boxes to start on top of the new page
foreach ($this->cellBoxes as $cell) {
$cell['box']->y = $page->y;
$this->renderTopBorder($cell['styles'], $cell['box']);
}
// Maintain horizontal rendering position
$page->x = $oldPage->x;
$page->y = $page->startY;
$this->tableBox['box']->y = $page->y;
return $this->lastPageForCell = $page;
}
