Subversion-Projekte lars-tiefland.php_share

<?php

require_once(HTML2PS_DIR.'filter.post.positioned.class.php');

class LayoutEngineDefault extends LayoutEngine {

  function process(&$box, &$media, &$driver, &$context) {

    // Calculate the size of text boxes

    if (is_null($box->reflow_text($driver))) {

      error_log("LayoutEngineDefault::process: reflow_text call failed");

      return null;

    };

    // Explicitly remove any height declarations from the BODY-generated box;

    // BODY should always fill last page completely. Percentage height of the BODY is meaningless

    // on the paged media.

    $box->_height_constraint = new HCConstraint(null, null, null);

    $margin = $box->get_css_property(CSS_MARGIN);

    $margin->calcPercentages(mm2pt($media->width() - $media->margins['left'] - $media->margins['right']));

    $box->setCSSProperty(CSS_MARGIN, $margin);

    $box->width = mm2pt($media->width() - $media->margins['left'] - $media->margins['right']) -

      $box->_get_hor_extra();

    $box->setCSSProperty(CSS_WIDTH, new WCConstant($box->width));

    $box->height = mm2pt($media->real_height()) - $box->_get_vert_extra();

    $box->put_top(mm2pt($media->height() -

                        $media->margins['top']) -

                  $box->get_extra_top());

    $box->put_left(mm2pt($media->margins['left']) +

                   $box->get_extra_left());

    $flag = false;

    $whitespace_flag = false;

    $box->reflow_whitespace($flag, $whitespace_flag);

    $box->pre_reflow_images();

    $viewport = new FlowViewport();

    $viewport->left   = mm2pt($media->margins['left']);

    $viewport->top    = mm2pt($media->height() - $media->margins['top']);

    $viewport->width  = mm2pt($media->width()  - $media->margins['left'] - $media->margins['right']);

    $viewport->height = mm2pt($media->height() - $media->margins['top'] - $media->margins['bottom']);

    $fake_parent = null;

    $context->push_viewport($viewport);

    $box->reflow($fake_parent, $context);

    // Make the top-level box competely fill the last page

    $page_real_height = mm2pt($media->real_height());

    // Note we cannot have less than 1 page in our doc; max() call

    // is required as we, in general, CAN have the content height strictly equal to 0.

    // In this case wi still render the very first page

    $pages = max(1,ceil($box->get_full_height() / $page_real_height));

    /**

     * Set body box height so it will fit the page exactly

     */

    $box->height = $pages * $page_real_height - $box->_get_vert_extra();

    $driver->set_expected_pages($pages);

    /**

     * Flow absolute-positioned boxes;

     * note that we should know the number of expected pages at this moment, unless

     * we will not be able to calculate positions for elements using 'bottom: ...' CSS property

     */

    for ($i=0, $num_positioned = count($context->absolute_positioned); $i < $num_positioned; $i++) {

      $context->push();

      $context->absolute_positioned[$i]->reflow_absolute($context);

      $context->pop();

    };

    // Flow fixed-positioned box

    for ($i=0, $num_positioned = count($context->fixed_positioned); $i < $num_positioned; $i++) {

      $context->push();

      $context->fixed_positioned[$i]->reflow_fixed($context);

      $context->pop();

    };

    $box->reflow_inline();

    return true;

  }

}

?>