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<?php |
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|
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/** |
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* @package dompdf |
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* @link https://github.com/dompdf/dompdf |
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* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License |
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*/ |
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namespace WCPOS\Vendor\Dompdf; |
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|
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use WCPOS\Vendor\Dompdf\FrameDecorator\AbstractFrameDecorator; |
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use WCPOS\Vendor\Dompdf\FrameDecorator\Block; |
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use WCPOS\Vendor\Dompdf\FrameDecorator\ListBullet; |
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use WCPOS\Vendor\Dompdf\FrameDecorator\Page; |
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use WCPOS\Vendor\Dompdf\FrameReflower\Text as TextFrameReflower; |
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use WCPOS\Vendor\Dompdf\Positioner\Inline as InlinePositioner; |
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use Iterator; |
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/** |
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* The line box class |
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* |
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* This class represents a line box |
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* http://www.w3.org/TR/CSS2/visuren.html#line-box |
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* |
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* @package dompdf |
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*/ |
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class LineBox |
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{ |
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/** |
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* @var Block |
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*/ |
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protected $_block_frame; |
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/** |
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* @var AbstractFrameDecorator[] |
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*/ |
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protected $_frames = []; |
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/** |
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* @var ListBullet[] |
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*/ |
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protected $list_markers = []; |
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/** |
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* @var int |
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*/ |
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public $wc = 0; |
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/** |
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* @var float |
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*/ |
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public $y = 0.0; |
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/** |
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* @var float |
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*/ |
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public $w = 0.0; |
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/** |
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* @var float |
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*/ |
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public $h = 0.0; |
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/** |
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* @var float |
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*/ |
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public $left = 0.0; |
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/** |
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* @var float |
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*/ |
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public $right = 0.0; |
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/** |
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* @var AbstractFrameDecorator |
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*/ |
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public $tallest_frame = null; |
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/** |
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* @var bool[] |
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*/ |
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public $floating_blocks = []; |
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/** |
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* @var bool |
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*/ |
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public $br = \false; |
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/** |
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* Whether the line box contains any inline-positioned frames. |
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* |
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* @var bool |
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*/ |
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public $inline = \false; |
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/** |
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* @var int |
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*/ |
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public static $max_float_reflows = 10000; |
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/** |
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* FIXME smelly hack, used by the get_float_offsets method. |
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* |
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* @var int |
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*/ |
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private static $float_offset_anti_infinite_loop = 10000; |
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/** |
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* @param Block $frame the Block containing this line |
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* @param float $y |
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*/ |
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public function __construct(Block $frame, float $y = 0.0) |
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{ |
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$this->_block_frame = $frame; |
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$this->_frames = []; |
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$this->y = $y; |
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$this->get_float_offsets(); |
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} |
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/** |
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* Returns the floating elements inside the first floating parent |
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* |
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* @param Page $root |
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* |
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* @return Frame[] |
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*/ |
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public function get_floats_inside(Page $root) : array |
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{ |
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$floating_frames = $root->get_floating_frames(); |
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if (\count($floating_frames) == 0) { |
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return $floating_frames; |
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} |
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// Find nearest floating element |
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$p = $this->_block_frame; |
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while ($p->get_style()->float === "none") { |
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$parent = $p->get_parent(); |
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if (!$parent) { |
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break; |
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} |
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$p = $parent; |
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} |
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if ($p == $root) { |
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return $floating_frames; |
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} |
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$parent = $p; |
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$childs = []; |
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foreach ($floating_frames as $_floating) { |
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$p = $_floating->get_parent(); |
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while (($p = $p->get_parent()) && $p !== $parent) { |
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} |
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if ($p) { |
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$childs[] = $p; |
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} |
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} |
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return $childs; |
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} |
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/** |
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* Resets the anti-infinite-loop counter for the get_float_offsets method. |
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*/ |
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public static function reset_float_reflow_limit() : void |
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{ |
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self::$float_offset_anti_infinite_loop = self::$max_float_reflows; |
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} |
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public function get_float_offsets() : void |
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{ |
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$reflower = $this->_block_frame->get_reflower(); |
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if (!$reflower) { |
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return; |
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} |
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$cb_w = null; |
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$block = $this->_block_frame; |
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$root = $block->get_root(); |
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if (!$root) { |
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return; |
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} |
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$style = $this->_block_frame->get_style(); |
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$floating_frames = $this->get_floats_inside($root); |
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$inside_left_floating_width = 0; |
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$inside_right_floating_width = 0; |
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$outside_left_floating_width = 0; |
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$outside_right_floating_width = 0; |
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foreach ($floating_frames as $child_key => $floating_frame) { |
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$floating_frame_parent = $floating_frame->get_parent(); |
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$id = $floating_frame->get_id(); |
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if (isset($this->floating_blocks[$id])) { |
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continue; |
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} |
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$float = $floating_frame->get_style()->float; |
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$floating_width = $floating_frame->get_margin_width(); |
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if (!$cb_w) { |
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$cb_w = $floating_frame->get_containing_block("w"); |
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} |
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$line_w = $this->get_width(); |
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if (!$floating_frame->_float_next_line && $cb_w <= $line_w + $floating_width && $cb_w > $line_w) { |
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$floating_frame->_float_next_line = \true; |
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continue; |
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} |
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// If the child is still shifted by the floating element |
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if (self::$float_offset_anti_infinite_loop-- > 0 && $floating_frame->get_position("y") + $floating_frame->get_margin_height() >= $this->y && $block->get_position("x") + $block->get_margin_width() >= $floating_frame->get_position("x")) { |
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if ($float === "left") { |
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if ($floating_frame_parent === $this->_block_frame) { |
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$inside_left_floating_width += $floating_width; |
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} else { |
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$outside_left_floating_width += $floating_width; |
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} |
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} elseif ($float === "right") { |
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if ($floating_frame_parent === $this->_block_frame) { |
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$inside_right_floating_width += $floating_width; |
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} else { |
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$outside_right_floating_width += $floating_width; |
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} |
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} |
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$this->floating_blocks[$id] = \true; |
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} else { |
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$root->remove_floating_frame($child_key); |
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} |
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} |
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$this->left += $inside_left_floating_width; |
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if ($outside_left_floating_width > 0 && $outside_left_floating_width > (float) $style->length_in_pt($style->margin_left) + (float) $style->length_in_pt($style->padding_left)) { |
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$this->left += $outside_left_floating_width - (float) $style->length_in_pt($style->margin_left) - (float) $style->length_in_pt($style->padding_left); |
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} |
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$this->right += $inside_right_floating_width; |
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if ($outside_right_floating_width > 0 && $outside_right_floating_width > (float) $style->length_in_pt($style->margin_left) + (float) $style->length_in_pt($style->padding_right)) { |
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$this->right += $outside_right_floating_width - (float) $style->length_in_pt($style->margin_right) - (float) $style->length_in_pt($style->padding_right); |
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} |
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} |
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/** |
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* @return float |
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*/ |
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public function get_width() : float |
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{ |
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return $this->left + $this->w + $this->right; |
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} |
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/** |
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* @return Block |
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*/ |
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public function get_block_frame() : Block |
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{ |
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return $this->_block_frame; |
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} |
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/** |
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* @return AbstractFrameDecorator[] |
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*/ |
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public function &get_frames() : array |
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{ |
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return $this->_frames; |
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} |
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/** |
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* @return bool |
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*/ |
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public function is_empty() : bool |
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{ |
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return $this->_frames === []; |
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} |
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/** |
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* @param AbstractFrameDecorator $frame |
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*/ |
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public function add_frame(Frame $frame) : void |
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{ |
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$this->_frames[] = $frame; |
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if ($frame->get_positioner() instanceof InlinePositioner) { |
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$this->inline = \true; |
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} |
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} |
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/** |
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* Remove the frame at the given index and all following frames from the |
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* line. |
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* |
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* @param int $index |
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*/ |
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public function remove_frames(int $index) : void |
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{ |
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$lastIndex = \count($this->_frames) - 1; |
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if ($index < 0 || $index > $lastIndex) { |
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return; |
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} |
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for ($i = $lastIndex; $i >= $index; $i--) { |
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$f = $this->_frames[$i]; |
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unset($this->_frames[$i]); |
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$this->w -= $f->get_margin_width(); |
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} |
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// Reset array indices |
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$this->_frames = \array_values($this->_frames); |
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// Recalculate the height of the line |
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$h = 0.0; |
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$this->inline = \false; |
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foreach ($this->_frames as $f) { |
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$h = \max($h, $f->get_margin_height()); |
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if ($f->get_positioner() instanceof InlinePositioner) { |
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$this->inline = \true; |
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} |
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} |
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$this->h = $h; |
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} |
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/** |
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* Get the `outside` positioned list markers to be vertically aligned with |
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* the line box. |
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* |
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* @return ListBullet[] |
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*/ |
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public function get_list_markers() : array |
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{ |
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return $this->list_markers; |
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} |
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/** |
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* Add a list marker to the line box. |
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* |
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* The list marker is only added for the purpose of vertical alignment, it |
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* is not actually added to the list of frames of the line box. |
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*/ |
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public function add_list_marker(ListBullet $marker) : void |
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{ |
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$this->list_markers[] = $marker; |
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} |
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/** |
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* An iterator of all list markers and inline positioned frames of the line |
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* box. |
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* |
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* @return Iterator<AbstractFrameDecorator> |
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*/ |
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public function frames_to_align() : Iterator |
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{ |
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yield from $this->list_markers; |
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foreach ($this->_frames as $frame) { |
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if ($frame->get_positioner() instanceof InlinePositioner) { |
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(yield $frame); |
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} |
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} |
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} |
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/** |
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* Trim trailing whitespace from the line. |
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*/ |
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public function trim_trailing_ws() : void |
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{ |
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$lastIndex = \count($this->_frames) - 1; |
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if ($lastIndex < 0) { |
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return; |
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} |
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$lastFrame = $this->_frames[$lastIndex]; |
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$reflower = $lastFrame->get_reflower(); |
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if ($reflower instanceof TextFrameReflower && !$lastFrame->is_pre()) { |
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$reflower->trim_trailing_ws(); |
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$this->recalculate_width(); |
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} |
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} |
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/** |
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* Recalculate LineBox width based on the contained frames total width. |
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* |
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* @return float |
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*/ |
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public function recalculate_width() : float |
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{ |
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$width = 0.0; |
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foreach ($this->_frames as $frame) { |
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$width += $frame->get_margin_width(); |
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} |
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return $this->w = $width; |
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} |
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public function __toString() : string |
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{ |
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$props = ["wc", "y", "w", "h", "left", "right", "br"]; |
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$s = ""; |
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foreach ($props as $prop) { |
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$s .= "{$prop}: " . $this->{$prop} . "\n"; |
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} |
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$s .= \count($this->_frames) . " frames\n"; |
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return $s; |
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} |
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} |
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|
