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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 absolutely positioned frames
*/
class Absolute extends AbstractPositioner
{
/**
* @param AbstractFrameDecorator $frame
*/
function position(AbstractFrameDecorator $frame): void
{
if ($frame->get_reflower() instanceof Block) {
$style = $frame->get_style();
[$cbx, $cby, $cbw, $cbh] = $frame->get_containing_block();
// If the `top` value is `auto`, the frame will be repositioned
// after its height has been resolved
$left = (float) $style->length_in_pt($style->left, $cbw);
$top = (float) $style->length_in_pt($style->top, $cbh);
$frame->set_position($cbx + $left, $cby + $top);
} 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();
$block_parent = $frame->find_block_parent();
$current_line = $block_parent->get_current_line_box();
list($x, $y, $w, $h) = $frame->get_containing_block();
$inflow_x = $block_parent->get_content_box()["x"] + $current_line->left + $current_line->w;
$inflow_y = $current_line->y;
$top = $style->length_in_pt($style->top, $h);
$right = $style->length_in_pt($style->right, $w);
$bottom = $style->length_in_pt($style->bottom, $h);
$left = $style->length_in_pt($style->left, $w);
list($width, $height) = [$frame->get_margin_width(), $frame->get_margin_height()];
$orig_width = $style->get_specified("width");
$orig_height = $style->get_specified("height");
/****************************
*
* Width auto:
* ____________| left=auto | left=fixed |
* right=auto | A | B |
* right=fixed | C | D |
*
* Width fixed:
* ____________| left=auto | left=fixed |
* right=auto | E | F |
* right=fixed | G | H |
*****************************/
if ($left === "auto") {
if ($right === "auto") {
// A or E - Keep the frame at the same position
$x = $inflow_x;
} else {
if ($orig_width === "auto") {
// C
$x += $w - $width - $right;
} else {
// G
$x += $w - $width - $right;
}
}
} else {
if ($right === "auto") {
// B or F
$x += (float)$left;
} else {
if ($orig_width === "auto") {
// D - TODO change width
$x += (float)$left;
} else {
// H - Everything is fixed: left + width win
$x += (float)$left;
}
}
}
// The same vertically
if ($top === "auto") {
if ($bottom === "auto") {
// A or E - Keep the frame at the same position
$y = $inflow_y;
} else {
if ($orig_height === "auto") {
// C
$y += (float)$h - $height - (float)$bottom;
} else {
// G
$y += (float)$h - $height - (float)$bottom;
}
}
} else {
if ($bottom === "auto") {
// B or F
$y += (float)$top;
} else {
if ($orig_height === "auto") {
// D - TODO change height
$y += (float)$top;
} else {
// H - Everything is fixed: top + height win
$y += (float)$top;
}
}
}
$frame->set_position($x, $y);
}
}
}
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