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<?php
/**
* @package dompdf
* @link https://github.com/dompdf/dompdf
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
namespace Dompdf\Positioner;
use Dompdf\FrameDecorator\AbstractFrameDecorator;
use Dompdf\FrameReflower\Block;
/**
* Positions fixely positioned frames
*/
class Fixed extends Absolute
{
/**
* @param AbstractFrameDecorator $frame
*/
function position(AbstractFrameDecorator $frame): void
{
if ($frame->get_reflower() instanceof Block) {
parent::position($frame);
} else {
// Legacy positioning logic for image and table frames
// TODO: Resolve dimensions, margins, and offsets similar to the
// block case in the reflowers and use the simplified logic above
$style = $frame->get_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
$margin_top = (float)$initialcb_style->length_in_pt($initialcb_style->margin_top, $initialcb["h"]);
$margin_right = (float)$initialcb_style->length_in_pt($initialcb_style->margin_right, $initialcb["w"]);
$margin_bottom = (float)$initialcb_style->length_in_pt($initialcb_style->margin_bottom, $initialcb["h"]);
$margin_left = (float)$initialcb_style->length_in_pt($initialcb_style->margin_left, $initialcb["w"]);
// The needed computed style of the element
$height = (float)$style->length_in_pt($style->get_specified("height"), $initialcb["h"]);
$width = (float)$style->length_in_pt($style->get_specified("width"), $initialcb["w"]);
$top = $style->length_in_pt($style->get_specified("top"), $initialcb["h"]);
$right = $style->length_in_pt($style->get_specified("right"), $initialcb["w"]);
$bottom = $style->length_in_pt($style->get_specified("bottom"), $initialcb["h"]);
$left = $style->length_in_pt($style->get_specified("left"), $initialcb["w"]);
$y = $margin_top;
if (isset($top)) {
$y = (float)$top + $margin_top;
if ($top === "auto") {
$y = $margin_top;
if (isset($bottom) && $bottom !== "auto") {
$y = $initialcb["h"] - $bottom - $margin_bottom;
if ($frame->is_auto_height()) {
$y -= $height;
} else {
$y -= $frame->get_margin_height();
}
}
}
}
$x = $margin_left;
if (isset($left)) {
$x = (float)$left + $margin_left;
if ($left === "auto") {
$x = $margin_left;
if (isset($right) && $right !== "auto") {
$x = $initialcb["w"] - $right - $margin_right;
if ($frame->is_auto_width()) {
$x -= $width;
} else {
$x -= $frame->get_margin_width();
}
}
}
}
$frame->set_position($x, $y);
foreach ($frame->get_children() as $child) {
$child->set_position($x, $y);
}
}
}
}
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