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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
*/
/**
* Renders list bullets
*
* @access private
* @package dompdf
*/
class List_Bullet_Renderer extends Abstract_Renderer {
static function get_counter_chars($type) {
static $cache = array();
if ( isset($cache[$type]) ) {
return $cache[$type];
}
$uppercase = false;
$text = "";
switch ($type) {
case "decimal-leading-zero":
case "decimal":
case "1":
return "0123456789";
case "upper-alpha":
case "upper-latin":
case "A":
$uppercase = true;
case "lower-alpha":
case "lower-latin":
case "a":
$text = "abcdefghijklmnopqrstuvwxyz";
break;
case "upper-roman":
case "I":
$uppercase = true;
case "lower-roman":
case "i":
$text = "ivxlcdm";
break;
case "lower-greek":
for($i = 0; $i < 24; $i++) {
$text .= unichr($i+944);
}
break;
}
if ( $uppercase ) {
$text = strtoupper($text);
}
return $cache[$type] = "$text.";
}
/**
* @param integer $n
* @param string $type
* @param integer $pad
*
* @return string
*/
private function make_counter($n, $type, $pad = null){
$n = intval($n);
$text = "";
$uppercase = false;
switch ($type) {
case "decimal-leading-zero":
case "decimal":
case "1":
if ($pad)
$text = str_pad($n, $pad, "0", STR_PAD_LEFT);
else
$text = $n;
break;
case "upper-alpha":
case "upper-latin":
case "A":
$uppercase = true;
case "lower-alpha":
case "lower-latin":
case "a":
$text = chr( ($n % 26) + ord('a') - 1);
break;
case "upper-roman":
case "I":
$uppercase = true;
case "lower-roman":
case "i":
$text = dec2roman($n);
break;
case "lower-greek":
$text = unichr($n + 944);
break;
}
if ( $uppercase ) {
$text = strtoupper($text);
}
return "$text.";
}
function render(Frame $frame) {
$style = $frame->get_style();
$font_size = $style->get_font_size();
$line_height = $style->length_in_pt($style->line_height, $frame->get_containing_block("w"));
$this->_set_opacity( $frame->get_opacity( $style->opacity ) );
$li = $frame->get_parent();
// Don't render bullets twice if if was split
if ($li->_splitted) {
return;
}
// Handle list-style-image
// If list style image is requested but missing, fall back to predefined types
if ( $style->list_style_image !== "none" &&
!Image_Cache::is_broken($img = $frame->get_image_url())) {
list($x,$y) = $frame->get_position();
//For expected size and aspect, instead of box size, use image natural size scaled to DPI.
// Resample the bullet image to be consistent with 'auto' sized images
// See also Image_Frame_Reflower::get_min_max_width
// Tested php ver: value measured in px, suffix "px" not in value: rtrim unnecessary.
//$w = $frame->get_width();
//$h = $frame->get_height();
list($width, $height) = dompdf_getimagesize($img, $this->_dompdf->get_http_context());
$dpi = $this->_dompdf->get_option("dpi");
$w = ((float)rtrim($width, "px") * 72) / $dpi;
$h = ((float)rtrim($height, "px") * 72) / $dpi;
$x -= $w;
$y -= ($line_height - $font_size)/2; //Reverse hinting of list_bullet_positioner
$this->_canvas->image( $img, $x, $y, $w, $h);
} else {
$bullet_style = $style->list_style_type;
$fill = false;
switch ($bullet_style) {
default:
case "disc":
$fill = true;
case "circle":
list($x,$y) = $frame->get_position();
$r = ($font_size*(List_Bullet_Frame_Decorator::BULLET_SIZE /*-List_Bullet_Frame_Decorator::BULLET_THICKNESS*/ ))/2;
$x -= $font_size*(List_Bullet_Frame_Decorator::BULLET_SIZE/2);
$y += ($font_size*(1-List_Bullet_Frame_Decorator::BULLET_DESCENT))/2;
$o = $font_size*List_Bullet_Frame_Decorator::BULLET_THICKNESS;
$this->_canvas->circle($x, $y, $r, $style->color, $o, null, $fill);
break;
case "square":
list($x, $y) = $frame->get_position();
$w = $font_size*List_Bullet_Frame_Decorator::BULLET_SIZE;
$x -= $w;
$y += ($font_size*(1-List_Bullet_Frame_Decorator::BULLET_DESCENT-List_Bullet_Frame_Decorator::BULLET_SIZE))/2;
$this->_canvas->filled_rectangle($x, $y, $w, $w, $style->color);
break;
case "decimal-leading-zero":
case "decimal":
case "lower-alpha":
case "lower-latin":
case "lower-roman":
case "lower-greek":
case "upper-alpha":
case "upper-latin":
case "upper-roman":
case "1": // HTML 4.0 compatibility
case "a":
case "i":
case "A":
case "I":
$pad = null;
if ( $bullet_style === "decimal-leading-zero" ) {
$pad = strlen($li->get_parent()->get_node()->getAttribute("dompdf-children-count"));
}
$node = $frame->get_node();
if ( !$node->hasAttribute("dompdf-counter") ) {
return;
}
$index = $node->getAttribute("dompdf-counter");
$text = $this->make_counter($index, $bullet_style, $pad);
if ( trim($text) == "" ) {
return;
}
$spacing = 0;
$font_family = $style->font_family;
$line = $li->get_containing_line();
list($x, $y) = array($frame->get_position("x"), $line->y);
$x -= Font_Metrics::get_text_width($text, $font_family, $font_size, $spacing);
// Take line-height into account
$line_height = $style->line_height;
$y += ($line_height - $font_size) / 4; // FIXME I thought it should be 2, but 4 gives better results
$this->_canvas->text($x, $y, $text,
$font_family, $font_size,
$style->color, $spacing);
case "none":
break;
}
}
}
}
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