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Mini Shell
<?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\FrameReflower;
use Dompdf\Frame;
use Dompdf\Helpers;
use Dompdf\FrameDecorator\Block as BlockFrameDecorator;
use Dompdf\FrameDecorator\Image as ImageFrameDecorator;
/**
* Image reflower class
*
* @package dompdf
*/
class Image extends AbstractFrameReflower
{
/**
* Image constructor.
* @param ImageFrameDecorator $frame
*/
function __construct(ImageFrameDecorator $frame)
{
parent::__construct($frame);
}
/**
* @param BlockFrameDecorator|null $block
*/
function reflow(BlockFrameDecorator $block = null)
{
$this->_frame->position();
//FLOAT
//$frame = $this->_frame;
//$page = $frame->get_root();
//if ($frame->get_style()->float !== "none" ) {
// $page->add_floating_frame($this);
//}
// Set the frame's width
$this->get_min_max_width();
if ($block) {
$block->add_frame_to_line($this->_frame);
}
}
/**
* @return array
*/
function get_min_max_width()
{
$frame = $this->_frame;
if ($this->get_dompdf()->getOptions()->getDebugPng()) {
// Determine the image's size. Time consuming. Only when really needed?
list($img_width, $img_height) = Helpers::dompdf_getimagesize($frame->get_image_url(), $this->get_dompdf()->getHttpContext());
print "get_min_max_width() " .
$frame->get_style()->width . ' ' .
$frame->get_style()->height . ';' .
$frame->get_parent()->get_style()->width . " " .
$frame->get_parent()->get_style()->height . ";" .
$frame->get_parent()->get_parent()->get_style()->width . ' ' .
$frame->get_parent()->get_parent()->get_style()->height . ';' .
$img_width . ' ' .
$img_height . '|';
}
$style = $frame->get_style();
$width_forced = true;
$height_forced = true;
//own style auto or invalid value: use natural size in px
//own style value: ignore suffix text including unit, use given number as px
//own style %: walk up parent chain until found available space in pt; fill available space
//
//special ignored unit: e.g. 10ex: e treated as exponent; x ignored; 10e completely invalid ->like auto
$width = $this->get_size($frame, 'width');
$height = $this->get_size($frame, 'height');
if ($width === 'auto' || $height === 'auto') {
// Determine the image's size. Time consuming. Only when really needed!
list($img_width, $img_height) = Helpers::dompdf_getimagesize($frame->get_image_url(), $this->get_dompdf()->getHttpContext());
// don't treat 0 as error. Can be downscaled or can be catched elsewhere if image not readable.
// Resample according to px per inch
// See also ListBulletImage::__construct
if ($width === 'auto' && $height === 'auto') {
$dpi = $frame->get_dompdf()->getOptions()->getDpi();
$width = (float)($img_width * 72) / $dpi;
$height = (float)($img_height * 72) / $dpi;
$width_forced = false;
$height_forced = false;
} elseif ($height === 'auto') {
$height_forced = false;
$height = ($width / $img_width) * $img_height; //keep aspect ratio
} else {
$width_forced = false;
$width = ($height / $img_height) * $img_width; //keep aspect ratio
}
}
// Handle min/max width/height
if ($style->min_width !== "none" ||
$style->max_width !== "none" ||
$style->min_height !== "none" ||
$style->max_height !== "none"
) {
list( /*$x*/, /*$y*/, $w, $h) = $frame->get_containing_block();
$min_width = $style->length_in_pt($style->min_width, $w);
$max_width = $style->length_in_pt($style->max_width, $w);
$min_height = $style->length_in_pt($style->min_height, $h);
$max_height = $style->length_in_pt($style->max_height, $h);
if ($max_width !== "none" && $max_width !== "auto" && $width > (float)$max_width) {
if (!$height_forced) {
$height *= (float)$max_width / $width;
}
$width = (float)$max_width;
}
if ($min_width !== "none" && $min_width !== "auto" && $width < (float)$min_width) {
if (!$height_forced) {
$height *= (float)$min_width / $width;
}
$width = (float)$min_width;
}
if ($max_height !== "none" && $max_height !== "auto" && $height > (float)$max_height) {
if (!$width_forced) {
$width *= (float)$max_height / $height;
}
$height = (float)$max_height;
}
if ($min_height !== "none" && $min_height !== "auto" && $height < (float)$min_height) {
if (!$width_forced) {
$width *= (float)$min_height / $height;
}
$height = (float)$min_height;
}
}
if ($this->get_dompdf()->getOptions()->getDebugPng()) {
print $width . ' ' . $height . ';';
}
$style->width = $width . "pt";
$style->height = $height . "pt";
$style->min_width = "none";
$style->max_width = "none";
$style->min_height = "none";
$style->max_height = "none";
return [$width, $width, "min" => $width, "max" => $width];
}
private function get_size(Frame $f, string $type)
{
$ref_stack = [];
$result_size = 0.0;
do {
$f_style = $f->get_style();
$current_size = $f_style->$type;
if (Helpers::is_percent($current_size)) {
$ref_stack[] = str_replace('%px', '%', $current_size);
} else {
// auto is a valid first result. In case of previous percentage values we need a real size
if ($current_size !== 'auto' || count($ref_stack) === 0) {
$result_size = $f_style->length_in_pt($current_size);
break;
}
}
} while (($f = $f->get_parent()));
// if we built a percentage stack walk up to find the real size
if (count($ref_stack) > 0) {
while (($ref = array_pop($ref_stack))) {
$result_size = $f_style->length_in_pt($ref, $result_size);
}
}
return $result_size;
}
}
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