crm.fsf.org/20131203/files/sites/all/modules-old/civicrm/vendor/dompdf/dompdf/src/FrameReflower/Page.php

   1 <?php
   2 /**
   3  * @package dompdf
   4  * @link    http://dompdf.github.com/
   5  * @author  Benj Carson <benjcarson@digitaljunkies.ca>
   6  * @author  Fabien Ménager <fabien.menager@gmail.com>
   7  * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
   8  */
   9 namespace Dompdf\FrameReflower;
  10
  11 use Dompdf\Frame;
  12 use Dompdf\FrameDecorator\Block as BlockFrameDecorator;
  13 use Dompdf\FrameDecorator\Page as PageFrameDecorator;
  14
  15 /**
  16  * Reflows pages
  17  *
  18  * @package dompdf
  19  */
  20 class Page extends AbstractFrameReflower
  21 {
  22
  23     /**
  24      * Cache of the callbacks array
  25      *
  26      * @var array
  27      */
  28     private $_callbacks;
  29
  30     /**
  31      * Cache of the canvas
  32      *
  33      * @var \Dompdf\Canvas
  34      */
  35     private $_canvas;
  36
  37     function __construct(PageFrameDecorator $frame)
  38     {
  39         parent::__construct($frame);
  40     }
  41
  42     function apply_page_style(Frame $frame, $page_number)
  43     {
  44         $style = $frame->get_style();
  45         $page_styles = $style->get_stylesheet()->get_page_styles();
  46
  47         // http://www.w3.org/TR/CSS21/page.html#page-selectors
  48         if (count($page_styles) > 1) {
  49             $odd = $page_number % 2 == 1;
  50             $first = $page_number == 1;
  51
  52             $style = clone $page_styles["base"];
  53
  54             // FIXME RTL
  55             if ($odd && isset($page_styles[":right"])) {
  56                 $style->merge($page_styles[":right"]);
  57             }
  58
  59             if ($odd && isset($page_styles[":odd"])) {
  60                 $style->merge($page_styles[":odd"]);
  61             }
  62
  63             // FIXME RTL
  64             if (!$odd && isset($page_styles[":left"])) {
  65                 $style->merge($page_styles[":left"]);
  66             }
  67
  68             if (!$odd && isset($page_styles[":even"])) {
  69                 $style->merge($page_styles[":even"]);
  70             }
  71
  72             if ($first && isset($page_styles[":first"])) {
  73                 $style->merge($page_styles[":first"]);
  74             }
  75
  76             $frame->set_style($style);
  77         }
  78     }
  79
  80     //........................................................................
  81
  82     /**
  83      * Paged layout:
  84      * http://www.w3.org/TR/CSS21/page.html
  85      */
  86     function reflow(BlockFrameDecorator $block = null)
  87     {
  88         $fixed_children = array();
  89         $prev_child = null;
  90         $child = $this->_frame->get_first_child();
  91         $current_page = 0;
  92
  93         while ($child) {
  94             $this->apply_page_style($this->_frame, $current_page + 1);
  95
  96             $style = $this->_frame->get_style();
  97
  98             // Pages are only concerned with margins
  99             $cb = $this->_frame->get_containing_block();
 100             $left = $style->length_in_pt($style->margin_left, $cb["w"]);
 101             $right = $style->length_in_pt($style->margin_right, $cb["w"]);
 102             $top = $style->length_in_pt($style->margin_top, $cb["h"]);
 103             $bottom = $style->length_in_pt($style->margin_bottom, $cb["h"]);
 104
 105             $content_x = $cb["x"] + $left;
 106             $content_y = $cb["y"] + $top;
 107             $content_width = $cb["w"] - $left - $right;
 108             $content_height = $cb["h"] - $top - $bottom;
 109
 110             // Only if it's the first page, we save the nodes with a fixed position
 111             if ($current_page == 0) {
 112                 $children = $child->get_children();
 113                 foreach ($children as $onechild) {
 114                     if ($onechild->get_style()->position === "fixed") {
 115                         $fixed_children[] = $onechild->deep_copy();
 116                     }
 117                 }
 118                 $fixed_children = array_reverse($fixed_children);
 119             }
 120
 121             $child->set_containing_block($content_x, $content_y, $content_width, $content_height);
 122
 123             // Check for begin reflow callback
 124             $this->_check_callbacks("begin_page_reflow", $child);
 125
 126             //Insert a copy of each node which have a fixed position
 127             if ($current_page >= 1) {
 128                 foreach ($fixed_children as $fixed_child) {
 129                     $child->insert_child_before($fixed_child->deep_copy(), $child->get_first_child());
 130                 }
 131             }
 132
 133             $child->reflow();
 134             $next_child = $child->get_next_sibling();
 135
 136             // Check for begin render callback
 137             $this->_check_callbacks("begin_page_render", $child);
 138
 139             // Render the page
 140             $this->_frame->get_renderer()->render($child);
 141
 142             // Check for end render callback
 143             $this->_check_callbacks("end_page_render", $child);
 144
 145             if ($next_child) {
 146                 $this->_frame->next_page();
 147             }
 148
 149             // Wait to dispose of all frames on the previous page
 150             // so callback will have access to them
 151             if ($prev_child) {
 152                 $prev_child->dispose(true);
 153             }
 154             $prev_child = $child;
 155             $child = $next_child;
 156             $current_page++;
 157         }
 158
 159         // Dispose of previous page if it still exists
 160         if ($prev_child) {
 161             $prev_child->dispose(true);
 162         }
 163     }
 164
 165     //........................................................................
 166
 167     /**
 168      * Check for callbacks that need to be performed when a given event
 169      * gets triggered on a page
 170      *
 171      * @param string $event the type of event
 172      * @param Frame $frame  the frame that event is triggered on
 173      */
 174     protected function _check_callbacks($event, $frame)
 175     {
 176         if (!isset($this->_callbacks)) {
 177             $dompdf = $this->_frame->get_dompdf();
 178             $this->_callbacks = $dompdf->get_callbacks();
 179             $this->_canvas = $dompdf->get_canvas();
 180         }
 181
 182         if (is_array($this->_callbacks) && isset($this->_callbacks[$event])) {
 183             $info = array(
 184                 0 => $this->_canvas, "canvas" => $this->_canvas,
 185                 1 => $frame,         "frame"  => $frame,
 186             );
 187             $fs = $this->_callbacks[$event];
 188             foreach ($fs as $f) {
 189                 if (is_callable($f)) {
 190                     if (is_array($f)) {
 191                         $f[0]->{$f[1]}($info);
 192                     } else {
 193                         $f($info);
 194                     }
 195                 }
 196             }
 197         }
 198     }
 199 }