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dompdf/src/Positioner/Fixed.php
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<?php
/**
* @package dompdf
* @link http://dompdf.github.com/
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @author Fabien Ménager <fabien.menager@gmail.com>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
namespace Dompdf\Positioner;
use Dompdf\FrameDecorator\AbstractFrameDecorator;
/**
* Positions fixely positioned frames
*/
class Fixed extends AbstractPositioner
{
function __construct(AbstractFrameDecorator $frame)
{
parent::__construct($frame);
}
function position()
{
$frame = $this->_frame;
$style = $frame->get_original_style();
$root = $frame->get_root();
$initialcb = $root->get_containing_block();
$initialcb_style = $root->get_style();
$p = $frame->find_block_parent();
if ($p) {
$p->add_line();
}
// Compute the margins of the @page style
$margin_top = $initialcb_style->length_in_pt($initialcb_style->margin_top, $initialcb["h"]);
$margin_right = $initialcb_style->length_in_pt($initialcb_style->margin_right, $initialcb["w"]);
$margin_bottom = $initialcb_style->length_in_pt($initialcb_style->margin_bottom, $initialcb["h"]);
$margin_left = $initialcb_style->length_in_pt($initialcb_style->margin_left, $initialcb["w"]);
// The needed computed style of the element
$height = $style->length_in_pt($style->height, $initialcb["h"]);
$width = $style->length_in_pt($style->width, $initialcb["w"]);
$top = $style->length_in_pt($style->top, $initialcb["h"]);
$right = $style->length_in_pt($style->right, $initialcb["w"]);
$bottom = $style->length_in_pt($style->bottom, $initialcb["h"]);
$left = $style->length_in_pt($style->left, $initialcb["w"]);
$y = $margin_top;
if (isset($top)) {
$y = $top + $margin_top;
if ($top === "auto") {
$y = $margin_top;
if (isset($bottom) && $bottom !== "auto") {
$y = $initialcb["h"] - $bottom - $margin_bottom;
$margin_height = $this->_frame->get_margin_height();
if ($margin_height !== "auto") {
$y -= $margin_height;
} else {
$y -= $height;
}
}
}
}
$x = $margin_left;
if (isset($left)) {
$x = $left + $margin_left;
if ($left === "auto") {
$x = $margin_left;
if (isset($right) && $right !== "auto") {
$x = $initialcb["w"] - $right - $margin_right;
$margin_width = $this->_frame->get_margin_width();
if ($margin_width !== "auto") {
$x -= $margin_width;
} else {
$x -= $width;
}
}
}
}
$frame->set_position($x, $y);
$children = $frame->get_children();
foreach ($children as $child) {
$child->set_position($x, $y);
}
}
}
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