vendor/dompdf/dompdf/src/Positioner/Absolute.php

   1 <?php
   2 /**
   3  * @package dompdf
   4  * @link    http://dompdf.github.com/
   5  * @author  Benj Carson <benjcarson@digitaljunkies.ca>
   6  * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
   7  */
   8
   9 namespace Dompdf\Positioner;
  10
  11 use Dompdf\FrameDecorator\AbstractFrameDecorator;
  12
  13 /**
  14  * Positions absolutely positioned frames
  15  */
  16 class Absolute extends AbstractPositioner
  17 {
  18
  19     /**
  20      * @param AbstractFrameDecorator $frame
  21      */
  22     function position(AbstractFrameDecorator $frame)
  23     {
  24         $style = $frame->get_style();
  25
  26         $p = $frame->find_positionned_parent();
  27
  28         list($x, $y, $w, $h) = $frame->get_containing_block();
  29
  30         $top = $style->length_in_pt($style->top, $h);
  31         $right = $style->length_in_pt($style->right, $w);
  32         $bottom = $style->length_in_pt($style->bottom, $h);
  33         $left = $style->length_in_pt($style->left, $w);
  34
  35         if ($p && !($left === "auto" && $right === "auto")) {
  36             // Get the parent's padding box (see http://www.w3.org/TR/CSS21/visuren.html#propdef-top)
  37             list($x, $y, $w, $h) = $p->get_padding_box();
  38         }
  39
  40         list($width, $height) = array($frame->get_margin_width(), $frame->get_margin_height());
  41
  42         $orig_style = $frame->get_original_style();
  43         $orig_width = $orig_style->width;
  44         $orig_height = $orig_style->height;
  45
  46         /****************************
  47          *
  48          * Width auto:
  49          * ____________| left=auto | left=fixed |
  50          * right=auto  |     A     |     B      |
  51          * right=fixed |     C     |     D      |
  52          *
  53          * Width fixed:
  54          * ____________| left=auto | left=fixed |
  55          * right=auto  |     E     |     F      |
  56          * right=fixed |     G     |     H      |
  57          *****************************/
  58
  59         if ($left === "auto") {
  60             if ($right === "auto") {
  61                 // A or E - Keep the frame at the same position
  62                 $x = $x + $frame->find_block_parent()->get_current_line_box()->w;
  63             } else {
  64                 if ($orig_width === "auto") {
  65                     // C
  66                     $x += $w - $width - $right;
  67                 } else {
  68                     // G
  69                     $x += $w - $width - $right;
  70                 }
  71             }
  72         } else {
  73             if ($right === "auto") {
  74                 // B or F
  75                 $x += (float)$left;
  76             } else {
  77                 if ($orig_width === "auto") {
  78                     // D - TODO change width
  79                     $x += (float)$left;
  80                 } else {
  81                     // H - Everything is fixed: left + width win
  82                     $x += (float)$left;
  83                 }
  84             }
  85         }
  86
  87         // The same vertically
  88         if ($top === "auto") {
  89             if ($bottom === "auto") {
  90                 // A or E - Keep the frame at the same position
  91                 $y = $frame->find_block_parent()->get_current_line_box()->y;
  92             } else {
  93                 if ($orig_height === "auto") {
  94                     // C
  95                     $y += (float)$h - $height - (float)$bottom;
  96                 } else {
  97                     // G
  98                     $y += (float)$h - $height - (float)$bottom;
  99                 }
 100             }
 101         } else {
 102             if ($bottom === "auto") {
 103                 // B or F
 104                 $y += (float)$top;
 105             } else {
 106                 if ($orig_height === "auto") {
 107                     // D - TODO change height
 108                     $y += (float)$top;
 109                 } else {
 110                     // H - Everything is fixed: top + height win
 111                     $y += (float)$top;
 112                 }
 113             }
 114         }
 115
 116         $frame->set_position($x, $y);
 117     }
 118 }