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<?php
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/**
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* @package dompdf
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* @link https://github.com/dompdf/dompdf
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* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
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*/
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namespace Dompdf;
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use Dompdf\Renderer\AbstractRenderer;
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use Dompdf\Renderer\Block;
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use Dompdf\Renderer\Image;
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use Dompdf\Renderer\Inline;
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use Dompdf\Renderer\ListBullet;
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use Dompdf\Renderer\TableCell;
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use Dompdf\Renderer\TableRow;
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use Dompdf\Renderer\TableRowGroup;
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use Dompdf\Renderer\Text;
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/**
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* Concrete renderer
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*
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* Instantiates several specific renderers in order to render any given frame.
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*
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* @package dompdf
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*/
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class Renderer extends AbstractRenderer
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{
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/**
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* Array of renderers for specific frame types
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*
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* @var AbstractRenderer[]
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*/
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protected $_renderers;
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/**
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* Cache of the callbacks array
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*
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* @var array
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*/
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private $_callbacks;
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/**
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* Advance the canvas to the next page
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*/
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function new_page()
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{
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$this->_canvas->new_page();
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}
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/**
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* Render frames recursively
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*
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* @param Frame $frame the frame to render
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*/
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public function render(Frame $frame)
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{
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global $_dompdf_debug;
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$this->_check_callbacks("begin_frame", $frame);
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if ($_dompdf_debug) {
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echo $frame;
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flush();
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}
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$style = $frame->get_style();
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if (in_array($style->visibility, ["hidden", "collapse"], true)) {
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return;
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}
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$display = $style->display;
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$transformList = $style->transform;
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$hasTransform = $transformList !== [];
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// Starts the CSS transformation
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if ($hasTransform) {
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$this->_canvas->save();
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[$x, $y] = $frame->get_padding_box();
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[$originX, $originY] = $style->transform_origin;
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$w = (float) $style->length_in_pt($style->width);
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$h = (float) $style->length_in_pt($style->height);
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foreach ($transformList as $transform) {
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[$function, $values] = $transform;
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if ($function === "matrix") {
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$function = "transform";
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} elseif ($function === "translate") {
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$values[0] = $style->length_in_pt($values[0], $w);
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$values[1] = $style->length_in_pt($values[1], $h);
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}
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$values[] = $x + $style->length_in_pt($originX, $w);
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$values[] = $y + $style->length_in_pt($originY, $h);
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call_user_func_array([$this->_canvas, $function], $values);
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}
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}
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switch ($display) {
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case "block":
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case "list-item":
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case "inline-block":
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case "table":
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case "inline-table":
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$this->_render_frame("block", $frame);
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break;
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case "inline":
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if ($frame->is_text_node()) {
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$this->_render_frame("text", $frame);
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} else {
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$this->_render_frame("inline", $frame);
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}
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break;
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case "table-cell":
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$this->_render_frame("table-cell", $frame);
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break;
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case "table-row":
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$this->_render_frame("table-row", $frame);
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break;
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case "table-row-group":
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case "table-header-group":
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case "table-footer-group":
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$this->_render_frame("table-row-group", $frame);
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break;
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case "-dompdf-list-bullet":
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$this->_render_frame("list-bullet", $frame);
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break;
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case "-dompdf-image":
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$this->_render_frame("image", $frame);
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break;
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case "none":
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$node = $frame->get_node();
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if ($node->nodeName === "script") {
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if ($node->getAttribute("type") === "text/php" ||
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$node->getAttribute("language") === "php"
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) {
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// Evaluate embedded php scripts
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$this->_render_frame("php", $frame);
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} elseif ($node->getAttribute("type") === "text/javascript" ||
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$node->getAttribute("language") === "javascript"
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) {
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// Insert JavaScript
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$this->_render_frame("javascript", $frame);
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}
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}
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// Don't render children, so skip to next iter
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return;
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default:
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break;
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}
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// Starts the overflow: hidden box
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if ($style->overflow === "hidden") {
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$padding_box = $frame->get_padding_box();
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[$x, $y, $w, $h] = $padding_box;
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$style = $frame->get_style();
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if ($style->has_border_radius()) {
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$border_box = $frame->get_border_box();
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[$tl, $tr, $br, $bl] = $style->resolve_border_radius($border_box, $padding_box);
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$this->_canvas->clipping_roundrectangle($x, $y, $w, $h, $tl, $tr, $br, $bl);
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} else {
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$this->_canvas->clipping_rectangle($x, $y, $w, $h);
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}
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}
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$stack = [];
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foreach ($frame->get_children() as $child) {
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// < 0 : negative z-index
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// = 0 : no z-index, no stacking context
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// = 1 : stacking context without z-index
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// > 1 : z-index
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$child_style = $child->get_style();
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$child_z_index = $child_style->z_index;
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$z_index = 0;
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if ($child_z_index !== "auto") {
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$z_index = $child_z_index + 1;
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} elseif ($child_style->float !== "none" || $child->is_positioned()) {
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$z_index = 1;
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}
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$stack[$z_index][] = $child;
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}
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ksort($stack);
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foreach ($stack as $by_index) {
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foreach ($by_index as $child) {
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$this->render($child);
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}
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}
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// Ends the overflow: hidden box
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if ($style->overflow === "hidden") {
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$this->_canvas->clipping_end();
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}
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if ($hasTransform) {
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$this->_canvas->restore();
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}
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// Check for end frame callback
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$this->_check_callbacks("end_frame", $frame);
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}
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/**
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* Check for callbacks that need to be performed when a given event
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* gets triggered on a frame
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*
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* @param string $event The type of event
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* @param Frame $frame The frame that event is triggered on
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*/
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protected function _check_callbacks(string $event, Frame $frame): void
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{
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if (!isset($this->_callbacks)) {
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$this->_callbacks = $this->_dompdf->getCallbacks();
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}
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if (isset($this->_callbacks[$event])) {
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$fs = $this->_callbacks[$event];
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$canvas = $this->_canvas;
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$fontMetrics = $this->_dompdf->getFontMetrics();
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foreach ($fs as $f) {
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$f($frame, $canvas, $fontMetrics);
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}
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}
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}
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/**
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* Render a single frame
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*
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* Creates Renderer objects on demand
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*
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* @param string $type type of renderer to use
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* @param Frame $frame the frame to render
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*/
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protected function _render_frame($type, $frame)
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{
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if (!isset($this->_renderers[$type])) {
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switch ($type) {
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case "block":
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$this->_renderers[$type] = new Block($this->_dompdf);
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break;
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case "inline":
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$this->_renderers[$type] = new Inline($this->_dompdf);
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break;
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case "text":
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$this->_renderers[$type] = new Text($this->_dompdf);
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break;
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case "image":
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$this->_renderers[$type] = new Image($this->_dompdf);
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break;
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case "table-cell":
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$this->_renderers[$type] = new TableCell($this->_dompdf);
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break;
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case "table-row":
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$this->_renderers[$type] = new TableRow($this->_dompdf);
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break;
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case "table-row-group":
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$this->_renderers[$type] = new TableRowGroup($this->_dompdf);
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break;
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case "list-bullet":
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$this->_renderers[$type] = new ListBullet($this->_dompdf);
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break;
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case "php":
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$this->_renderers[$type] = new PhpEvaluator($this->_canvas);
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break;
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case "javascript":
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$this->_renderers[$type] = new JavascriptEmbedder($this->_dompdf);
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break;
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}
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}
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$this->_renderers[$type]->render($frame);
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}
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}
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