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<?php
/**
* @package dompdf
* @link http://www.dompdf.com/
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
* @version $Id: renderer.cls.php 448 2011-11-13 13:00:03Z fabien.menager $
*/
/**
* Concrete renderer
*
* Instantiates several specific renderers in order to render any given
* frame.
*
* @access private
* @package dompdf
*/
class Renderer extends Abstract_Renderer {
/**
* Array of renderers for specific frame types
*
* @var array
*/
protected $_renderers;
/**
* Cache of the callbacks array
*
* @var array
*/
private $_callbacks;
/**
* true when a stacking context is currently built
* @var bool
*/
public static $stacking_first_pass = true;
/**
* Class destructor
*/
function __destruct() {
clear_object($this);
}
/**
* Advance the canvas to the next page
*/
function new_page() {
$this->_canvas->new_page();
}
/**
* Render frames recursively
*
* @param Frame $frame the frame to render
*/
function render(Frame $frame, $stacking = false) {
global $_dompdf_debug;
if ( $_dompdf_debug ) {
echo $frame;
flush();
}
$style = $frame->get_style();
if ( in_array($style->visibility, array("hidden", "collapse")) ) {
return;
}
$render_self = self::$stacking_first_pass && !$stacking || !self::$stacking_first_pass;
if ( $render_self ) {
$display = $style->display;
// Starts the CSS transformation
if ( $style->transform && is_array($style->transform) ) {
$this->_canvas->save();
list($x, $y, $w, $h) = $frame->get_padding_box();
$origin = $style->transform_origin;
foreach($style->transform as $transform) {
list($function, $values) = $transform;
if ( $function === "matrix" ) {
$function = "transform";
}
$values = array_map("floatval", $values);
$values[] = $x + $style->length_in_pt($origin[0], $style->width);
$values[] = $y + $style->length_in_pt($origin[1], $style->height);
call_user_func_array(array($this->_canvas, $function), $values);
}
}
switch ($display) {
case "block":
case "list-item":
case "inline-block":
case "table":
case "inline-table":
$this->_render_frame("block", $frame);
break;
case "inline":
if ( $frame->is_text_node() )
$this->_render_frame("text", $frame);
else
$this->_render_frame("inline", $frame);
break;
case "table-cell":
$this->_render_frame("table-cell", $frame);
break;
case "table-row-group":
case "table-header-group":
case "table-footer-group":
$this->_render_frame("table-row-group", $frame);
break;
case "-dompdf-list-bullet":
$this->_render_frame("list-bullet", $frame);
break;
case "-dompdf-image":
$this->_render_frame("image", $frame);
break;
case "none":
$node = $frame->get_node();
if ( $node->nodeName === "script" ) {
if ( $node->getAttribute("type") === "text/php" ||
$node->getAttribute("language") === "php" ) {
// Evaluate embedded php scripts
$this->_render_frame("php", $frame);
}
elseif ( $node->getAttribute("type") === "text/javascript" ||
$node->getAttribute("language") === "javascript" ) {
// Insert JavaScript
$this->_render_frame("javascript", $frame);
}
}
// Don't render children, so skip to next iter
return;
default:
break;
}
// Check for begin frame callback
$this->_check_callbacks("begin_frame", $frame);
// Starts the overflow: hidden box
if ( $style->overflow === "hidden" ) {
list($x, $y, $w, $h) = $frame->get_padding_box();
$this->_canvas->clipping_rectangle($x, $y, $w, $h);
}
}
$page = $frame->get_root()->get_reflower();
foreach ($frame->get_children() as $child) {
$child_style = $child->get_style();
$_stacking = $stacking;
// Stacking context
if ( self::$stacking_first_pass && (
$child_style->z_index !== "auto" ||
$child_style->float !== "none" ||
$child->is_positionned()) ) {
$z_index = ($child_style->z_index === "auto") ? 0 : intval($child_style->z_index);
$page->add_frame_to_stacking_context($child, $z_index);
$_stacking = true;
}
$this->render($child, $_stacking);
}
if ( $render_self ) {
// Ends the overflow: hidden box
if ( $style->overflow === "hidden" ) {
$this->_canvas->clipping_end();
}
if ( $style->transform && is_array($style->transform) ) {
$this->_canvas->restore();
}
// Check for end frame callback
$this->_check_callbacks("end_frame", $frame);
}
}
/**
* Check for callbacks that need to be performed when a given event
* gets triggered on a frame
*
* @param string $event the type of event
* @param Frame $frame the frame that event is triggered on
*/
protected function _check_callbacks($event, $frame) {
if (!isset($this->_callbacks)) {
$this->_callbacks = $this->_dompdf->get_callbacks();
}
if (is_array($this->_callbacks) && isset($this->_callbacks[$event])) {
$info = array(0 => $this->_canvas, "canvas" => $this->_canvas,
1 => $frame, "frame" => $frame);
$fs = $this->_callbacks[$event];
foreach ($fs as $f) {
if (is_callable($f)) {
if (is_array($f)) {
$f[0]->$f[1]($info);
} else {
$f($info);
}
}
}
}
}
/**
* Render a single frame
*
* Creates Renderer objects on demand
*
* @param string $type type of renderer to use
* @param Frame $frame the frame to render
*/
protected function _render_frame($type, $frame) {
if ( !isset($this->_renderers[$type]) ) {
switch ($type) {
case "block":
$this->_renderers[$type] = new Block_Renderer($this->_dompdf);
break;
case "inline":
$this->_renderers[$type] = new Inline_Renderer($this->_dompdf);
break;
case "text":
$this->_renderers[$type] = new Text_Renderer($this->_dompdf);
break;
case "image":
$this->_renderers[$type] = new Image_Renderer($this->_dompdf);
break;
case "table-cell":
$this->_renderers[$type] = new Table_Cell_Renderer($this->_dompdf);
break;
case "table-row-group":
$this->_renderers[$type] = new Table_Row_Group_Renderer($this->_dompdf);
break;
case "list-bullet":
$this->_renderers[$type] = new List_Bullet_Renderer($this->_dompdf);
break;
case "php":
$this->_renderers[$type] = new PHP_Evaluator($this->_canvas);
break;
case "javascript":
$this->_renderers[$type] = new Javascript_Embedder($this->_dompdf);
break;
}
}
$this->_renderers[$type]->render($frame);
}
}