<?php
/**
* This example exports the DOM tree of any given web site's HTML code to an SVG image.
*
* Just direct your browser to this file.
*/
use Utils\Autoload\Autoloader;
use ReingoldTilford\Algorithms\ReingoldTilfordAlgorithm;
use ReingoldTilford\Models\DomTreeModel;
use ReingoldTilford\Plotters\Plotter;
use ReingoldTilford\Styles\TreeStyle;
use Utils\Graphics2D\DrawingPanes\SvgDrawingPane;
use Utils\Geom\Dimension;
use Utils\Color\RgbColor;
require_once __DIR__.'/../app/bootstrap.inc';
header("Content-type: image/svg+xml");
$htmlBody = getHtmlBodyElement('http://www.phpclasses.org/');
// get the default style for a tree ...
$style = new TreeStyle();
// ... but do a bit of customisation
$style->shapeStyle->setWidth(48);
$style->shapeStyle->setHeight(30);
$style->shapeStyle->setColor(new RgbColor(232, 232, 232));
$style->shapeStyle->border->setWidth(3);
$style->shapeStyle->border->setColor(new RgbColor(50, 140, 198));
$style->edgeStyle->setWidth(3);
// get a new instance of the algorithm
$algorithm = new ReingoldTilfordAlgorithm();
// get the model for the DOM tree, so that the algorithm can traverse it
$model = new DomTreeModel($htmlBody);
// calculate the layout of the tree
$layout = $algorithm->getLayout($model, $style->orientation)->normalize();
// pass it to the plotter
$plotter = new Plotter($model, $layout, null, null, null);
// create a new SVG document
$document = new SvgDrawingPane($layout->getDimension($style));
// plot the tree onto the document
$plotter->plot($style, $document);
// print the document
echo $document->save();
/**
* This helper function gets the body element from a given website
*
* Obviously, this call can fail, but for mere demonstration purposes, any error handling has been left out for brevity.
*
* @param type $url
* @return type
*/
function getHtmlBodyElement($url)
{
error_reporting(0);
$domDocument = new DOMDocument();
$domDocument->loadHTML(file_get_contents($url));
error_reporting(E_ALL | E_STRICT);
return $domDocument->getElementsByTagName('body')->item(0);
}
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