HOR-2689

thirdparty/html2ps_pdf/box.utils.text-align.inc.php

@@ -0,0 +1,103 @@
+<?php
+// $Header: /cvsroot/html2ps/box.utils.text-align.inc.php,v 1.13 2007/01/09 20:13:48 Konstantin Exp $
+
+function ta_left(&$box, &$context, $lastline) {
+  // Do nothing; text is left-aligned by default
+}
+
+function ta_center(&$box, &$context, $lastline) {
+  $delta = $box->_line_length_delta($context) / 2;
+
+  $size = count($box->_line);
+  for ($i=0; $i< $size; $i++) {
+    $box->_line[$i]->offset($delta, 0);
+  };
+
+  $first_box =& $box->_line[0];
+  if (isset($first_box->wrapped) && !is_null($first_box->wrapped)) {
+    $first_box->offset_wrapped(-$delta, 0);
+  };
+}
+
+function ta_right(&$box, &$context, $lastline) {
+  $delta = $box->_line_length_delta($context);
+
+  $size = count($box->_line);
+  for ($i=0; $i<$size; $i++) {
+    $box->_line[$i]->offset($delta, 0);
+  };
+
+  $first_box =& $box->_line[0];
+  if (isset($first_box->wrapped) && !is_null($first_box->wrapped)) {
+    $first_box->offset_wrapped(-$delta, 0);
+  };
+}
+
+function ta_justify(&$box, &$context, $lastline) {
+  // last line is never justified
+  if ($lastline) { 
+    return; 
+  }
+
+  // If line box contains less that two items, no justification can be done, just return
+  if (count($box->_line) < 2) { 
+    return; 
+  }
+
+  // Calculate extra space to be filled by this line
+  $delta = $box->_line_length_delta($context);
+
+  // note that if it is the very first line inside the container, 'text-indent' value
+  // should not be taken into account while calculating delta value
+  if (count($box->content) > 0) {
+    if ($box->content[0]->uid === $box->_line[0]->uid) {
+      $delta -= $box->text_indent->calculate($box);
+    };
+  };
+
+  // if line takes less that MAX_JUSTIFY_FRACTION of available space, no justtification should be done
+  if ($delta > $box->_line_length() * MAX_JUSTIFY_FRACTION) {
+    return;
+  };
+
+  // Calculate offset for each whitespace box
+  $whitespace_count = 0;
+  $size = count($box->_line);
+
+  // Why $size-1? Ignore whitespace box, if it is located at the very end of 
+  // line box
+
+  // Also, ignore whitespace box at the very beginning of the line
+  for ($i=1; $i<$size-1; $i++) {
+    if (is_a($box->_line[$i],"WhitespaceBox")) {
+      $whitespace_count++;
+    };
+  };
+
+  if ($whitespace_count > 0) {
+    $offset = $delta / $whitespace_count;
+  } else {
+    $offset = 0;
+  };
+
+  // Offset all boxes in current line box
+  $num_whitespaces = 0;
+  $size = count($box->_line);
+  for ($i=1; $i < $size; $i++) {
+    /*
+     * Note that order is important: additional horizontal space 
+     * is added after the whitespace box; it is important, as 
+     * whitespace box (if it is the last box in the line) should not 
+     * run off the right edge of the container box
+     */
+    $box->_line[$i]->offset($offset * $num_whitespaces, 0);
+
+    if (is_a($box->_line[$i],"WhitespaceBox")) {
+      $num_whitespaces++;
+    };
+  };
+
+  // The very first box is not offset in this case, so we don't need to 
+  // call offset_wrapped to compensate this.
+}
+?>