Subversion-Projekte lars-tiefland.php_share

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Revision Autor Zeilennr. Zeile
1 lars 1 
<?php
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require_once(HTML2PS_DIR.'width.constraint.php');
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function merge_width_constraint($wc1, $wc2) {
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  if ($wc1->isNull()) {
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    return $wc2;
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  };
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  if ($wc1->isConstant() && !$wc2->isNull()) {
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    return $wc2;
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  };
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  if ($wc1->isFraction() && $wc2->isFraction()) {
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    return $wc2;
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  };
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  return $wc1;
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}
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// the second parameter of 'apply' method may be null; it means that
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// parent have 'fit' width and depends on the current constraint itself
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class WCNone extends WidthConstraint {
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  function WCNone() {
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    $this->WidthConstraint();
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  }
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  function applicable(&$box) { return false; }
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  function _apply($w, $pw) { return $w; }
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  function apply_inverse($w, $pw) { return $pw; }
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  function &_copy() {
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    $copy =& new WCNone();
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    return $copy;
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  }
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  function _units2pt($base) {
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  }
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  function isNull() { return true; }
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}
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class WCConstant extends WidthConstraint {
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  var $width;
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  function WCConstant($width) {
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    $this->WidthConstraint();
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    $this->width = $width;
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  }
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  function applicable(&$box) {
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    return true;
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  }
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  function _apply($w, $pw) {
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    return $this->width;
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  }
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  function apply_inverse($w, $pw) {
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    return $pw;
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  }
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  function &_copy() {
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    $copy =& new WCConstant($this->width);
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    return $copy;
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  }
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  function _units2pt($base) {
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    $this->width = units2pt($this->width, $base);
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  }
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  function isConstant() {
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    return true;
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  }
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}
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class WCFraction extends WidthConstraint {
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  var $fraction;
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  function applicable(&$box) {
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    if (is_null($box->parent)) { return false; };
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    $parent_wc = $box->parent->get_css_property(CSS_WIDTH);
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    return $box->isCell() || $parent_wc->applicable($box->parent);
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  }
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  function WCFraction($fraction) {
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    $this->WidthConstraint();
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    $this->fraction = $fraction;
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  }
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  function _apply($w, $pw) {
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    if (!is_null($pw)) {
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      return $pw * $this->fraction;
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    } else {
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      return $w;
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    };
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  }
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  function apply_inverse($w, $pw) {
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    if ($this->fraction > 0) { return $w / $this->fraction; } else { return 0; };
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  }
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  function &_copy() {
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    $copy =& new WCFraction($this->fraction);
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    return $copy;
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  }
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  function _units2pt($base) {
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  }
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  function isFraction() {
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    return true;
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  }
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}
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?>