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<?php
/**
* @package dompdf
* @link http://dompdf.github.com/
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @author Helmut Tischer <htischer@weihenstephan.org>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
namespace Dompdf\FrameDecorator;
use Dompdf\Dompdf;
use Dompdf\Frame;
use Dompdf\Helpers;
use Dompdf\Image\Cache;
/**
* Decorates frames for list bullets with custom images
*
* @package dompdf
*/
class ListBulletImage extends AbstractFrameDecorator
{
/**
* The underlying image frame
*
* @var Image
*/
protected $_img;
/**
* The image's width in pixels
*
* @var int
*/
protected $_width;
/**
* The image's height in pixels
*
* @var int
*/
protected $_height;
/**
* Class constructor
*
* @param Frame $frame the bullet frame to decorate
* @param Dompdf $dompdf the document's dompdf object
*/
function __construct(Frame $frame, Dompdf $dompdf)
{
$style = $frame->get_style();
$url = $style->list_style_image;
$frame->get_node()->setAttribute("src", $url);
$this->_img = new Image($frame, $dompdf);
parent::__construct($this->_img, $dompdf);
if (Cache::is_broken($this->_img->get_image_url())) {
$width = 0;
$height = 0;
} else {
list($width, $height) = Helpers::dompdf_getimagesize($this->_img->get_image_url(), $dompdf->getHttpContext());
}
// Resample the bullet image to be consistent with 'auto' sized images
// See also Image::get_min_max_width
// Tested php ver: value measured in px, suffix "px" not in value: rtrim unnecessary.
$dpi = $this->_dompdf->getOptions()->getDpi();
$this->_width = ((float)rtrim($width, "px") * 72) / $dpi;
$this->_height = ((float)rtrim($height, "px") * 72) / $dpi;
//If an image is taller as the containing block/box, the box should be extended.
//Neighbour elements are overwriting the overlapping image areas.
//Todo: Where can the box size be extended?
//Code below has no effect.
//See block_frame_reflower _calculate_restricted_height
//See generated_frame_reflower, Dompdf:render() "list-item", "-dompdf-list-bullet"S.
//Leave for now
//if ($style->min_height < $this->_height ) {
// $style->min_height = $this->_height;
//}
//$style->height = "auto";
}
/**
* Return the bullet's width
*
* @return int
*/
function get_width()
{
//ignore image width, use same width as on predefined bullet ListBullet
//for proper alignment of bullet image and text. Allow image to not fitting on left border.
//This controls the distance between bullet image and text
//return $this->_width;
return $this->_frame->get_style()->font_size * ListBullet::BULLET_SIZE +
2 * ListBullet::BULLET_PADDING;
}
/**
* Return the bullet's height
*
* @return int
*/
function get_height()
{
//based on image height
if ($this->_height == 0) {
$style = $this->_frame->get_style();
if ($style->list_style_type === "none") {
return 0;
}
return $style->font_size * ListBullet::BULLET_SIZE + 2 * ListBullet::BULLET_PADDING;
} else {
return $this->_height;
}
}
/**
* Override get_margin_width
*
* @return int
*/
function get_margin_width()
{
//ignore image width, use same width as on predefined bullet ListBullet
//for proper alignment of bullet image and text. Allow image to not fitting on left border.
//This controls the extra indentation of text to make room for the bullet image.
//Here use actual image size, not predefined bullet size
//return $this->_frame->get_style()->font_size*ListBullet::BULLET_SIZE +
// 2 * ListBullet::BULLET_PADDING;
// Small hack to prevent indenting of list text
// Image might not exist, then position like on list_bullet_frame_decorator fallback to none.
if ($this->_frame->get_style()->list_style_position === "outside" || $this->_width == 0) {
return 0;
}
//This aligns the "inside" image position with the text.
//The text starts to the right of the image.
//Between the image and the text there is an added margin of image width.
//Where this comes from is unknown.
//The corresponding ListBullet sets a smaller margin. bullet size?
return $this->_width + 2 * ListBullet::BULLET_PADDING;
}
/**
* Override get_margin_height()
*
* @return int
*/
function get_margin_height()
{
//Hits only on "inset" lists items, to increase height of box
//based on image height
return $this->_height + 2 * ListBullet::BULLET_PADDING;
}
/**
* Return image url
*
* @return string
*/
function get_image_url()
{
return $this->_img->get_image_url();
}
}
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