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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\FrameReflower;
use Dompdf\FrameDecorator\Block as BlockFrameDecorator;
use Dompdf\FrameDecorator\Inline as InlineFrameDecorator;
use Dompdf\FrameDecorator\Text as TextFrameDecorator;
/**
* Reflows inline frames
*
* @package dompdf
*/
class Inline extends AbstractFrameReflower
{
/**
* Inline constructor.
* @param InlineFrameDecorator $frame
*/
function __construct(InlineFrameDecorator $frame)
{
parent::__construct($frame);
}
/**
* Handle reflow of empty inline frames.
*
* Regular inline frames are positioned together with their text (or inline)
* children after child reflow. Empty inline frames have no children that
* could determine the positioning, so they need to be handled separately.
*
* @param BlockFrameDecorator $block
*/
protected function reflow_empty(BlockFrameDecorator $block): void
{
/** @var InlineFrameDecorator */
$frame = $this->_frame;
$style = $frame->get_style();
// Resolve width, so the margin width can be checked
$style->set_used("width", 0.0);
$cb = $frame->get_containing_block();
$line = $block->get_current_line_box();
$width = $frame->get_margin_width();
if ($width > ($cb["w"] - $line->left - $line->w - $line->right)) {
$block->add_line();
// Find the appropriate inline ancestor to split
$child = $frame;
$p = $child->get_parent();
while ($p instanceof InlineFrameDecorator && !$child->get_prev_sibling()) {
$child = $p;
$p = $p->get_parent();
}
if ($p instanceof InlineFrameDecorator) {
// Split parent and stop current reflow. Reflow continues
// via child-reflow loop of split parent
$p->split($child);
return;
}
}
$frame->position();
$block->add_frame_to_line($frame);
}
/**
* @param BlockFrameDecorator|null $block
*/
function reflow(?BlockFrameDecorator $block = null)
{
/** @var InlineFrameDecorator */
$frame = $this->_frame;
// Check if a page break is forced
$page = $frame->get_root();
$page->check_forced_page_break($frame);
if ($page->is_full()) {
return;
}
// Counters and generated content
$this->_set_content();
$style = $frame->get_style();
// Resolve auto margins
// https://www.w3.org/TR/CSS21/visudet.html#inline-width
// https://www.w3.org/TR/CSS21/visudet.html#inline-non-replaced
if ($style->margin_left === "auto") {
$style->set_used("margin_left", 0.0);
}
if ($style->margin_right === "auto") {
$style->set_used("margin_right", 0.0);
}
if ($style->margin_top === "auto") {
$style->set_used("margin_top", 0.0);
}
if ($style->margin_bottom === "auto") {
$style->set_used("margin_bottom", 0.0);
}
// Handle line breaks
if ($frame->get_node()->nodeName === "br") {
if ($block) {
$line = $block->get_current_line_box();
$frame->set_containing_line($line);
$block->maximize_line_height($frame->get_margin_height(), $frame);
$block->add_line(true);
$next = $frame->get_next_sibling();
$p = $frame->get_parent();
if ($next && $p instanceof InlineFrameDecorator) {
$p->split($next);
}
}
return;
}
// Handle empty inline frames
if (!$frame->get_first_child()) {
if ($block) {
$this->reflow_empty($block);
}
return;
}
// Add margin, padding & border width to the first and last children,
// so they are accounted for during text layout
if (($f = $frame->get_first_child()) && $f instanceof TextFrameDecorator) {
$f_style = $f->get_style();
$f_style->margin_left = $style->margin_left;
$f_style->padding_left = $style->padding_left;
$f_style->border_left_width = $style->border_left_width;
}
if (($l = $frame->get_last_child()) && $l instanceof TextFrameDecorator) {
$l_style = $l->get_style();
$l_style->margin_right = $style->margin_right;
$l_style->padding_right = $style->padding_right;
$l_style->border_right_width = $style->border_right_width;
}
$frame->position();
$cb = $frame->get_containing_block();
// Set the containing blocks and reflow each child. The containing
// block is not changed by line boxes.
foreach ($frame->get_children() as $child) {
$child->set_containing_block($cb);
$child->reflow($block);
// Stop reflow if the frame has been reset by a line or page break
// due to child reflow
if (!$frame->content_set) {
return;
}
}
// Assume the position of the first in-flow child, otherwise use the
// fallback position that was set before child reflow
$child = $frame->get_first_child();
while ($child && !$child->is_in_flow()) {
$child = $child->get_next_sibling();
}
if ($child) {
[$x, $y] = $child->get_position();
$frame->set_position($x, $y);
}
// Handle relative positioning
foreach ($frame->get_children() as $child) {
$this->position_relative($child);
}
if ($block) {
$block->add_frame_to_line($frame);
}
}
}