<?php
/**
* This example exports the directory structure of the installation folder of this package to HTML.
*
* Just direct your browser to this file.
*/
use Utils\Autoload\Autoloader;
use ReingoldTilford\Algorithms\ReingoldTilfordAlgorithm;
use ReingoldTilford\Models\FSTreeModel;
use ReingoldTilford\Plotters\Plotter;
use ReingoldTilford\Styles\TreeStyle;
use Utils\Graphics2D\DrawingPanes\HtmlDrawingPane;
use Utils\Graphics2D\Shapes\Styles\TextStyle;
use Utils\Geom\Dimension;
use Utils\File\Directory;
use Utils\Font\FontManager;
use Utils\Font\FontMetricServices\FontMetricServiceFactory;
use Utils\URL\Url;
// this example only runs through a web server
if(PHP_SAPI === 'cli')
{
echo 'This eample can only be run through a web server.'."\n".'This script will exit now.';
exit(-1);
}
require_once __DIR__.'/../app/bootstrap.inc';
// get the directory information
$rootDirectory = new Directory(new SplFileInfo(INSTALLATION_FOLDER));
$rootDirectory->expand();
$basenames = getFilenames($rootDirectory);
// get the default style for a tree
$style = new TreeStyle();
// get the respective font metric, to be able to determine the maximal string length
// this uses the Browser's rendering engine plus an AJAX call - which might fail
// see FontManager::createFontMetric and subsequent calls for more information
$metric = getFontMetric($style->textStyle);
// set the width and height of the nodes of the tree
$style->shapeStyle->setWidth($metric->getMaxWidth($basenames));
$style->shapeStyle->setHeight($metric->getMaxHeight($basenames));
// get a new instance of the algorithm
$algorithm = new ReingoldTilfordAlgorithm();
// get the model for the root directory, so that the algorithm can traverse it
$model = new FSTreeModel($rootDirectory);
// get 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 document
$document = new HtmlDrawingPane($layout->getDimension($style));
// plot it onto the document
$plotter->plot($style, $document);
// print the html head
printHtmlHead($style);
// print the document
echo $document->save();
/**
* This helper method returns the font metric for a given text style.
*
* In order to get the metrics of the font, back into the calling script, an AJAX request is pointed to to backend to initialise the font metric.
*
* @param TextStyle $textStyle the text style for which to font metric is needed
* @return FontMetric
*/
function getFontMetric(TextStyle $textStyle)
{
$currentUrl = Url::createCurrentUrlFromServerInfo();
$endpointUrl = $currentUrl->setPath(str_replace('example_directory_tree.php', 'FontManagerServiceEndpoint.php', $currentUrl->getPath()));
$fontManager = new FontManager(FontMetricServiceFactory::createFontMetricService($endpointUrl));
return $fontManager->getFontMetric($textStyle);
}
/**
* This helper method gets the names of all folders and files of the given directory.
*
* @param Directory $root
* @return ArrayObject the names of all folders and files of the given directory
*/
function getFilenames(Directory $root)
{
$basenames = new \ArrayObject();
foreach($root->getDecendants() as $node)
$basenames[] = $node->getBasename();
return $basenames;
}
/**
* This helper method prints the html head, e.g. the CSS styles in use.
*/
function printHtmlHead(TreeStyle $treeStyle)
{
echo '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"'.PHP_EOL.
'"http://www.w3.org/TR/html4/loose.dtd">'.PHP_EOL.
'<style>'.PHP_EOL.
'.rt_node'.PHP_EOL.
'{'.PHP_EOL.
'position: absolute;'.PHP_EOL.
'}'.PHP_EOL.
'.rt_edge'.PHP_EOL.
'{'.
'position: absolute;'.PHP_EOL.
'}'.PHP_EOL.
'.text'.PHP_EOL.
'{'.
'width: '.$treeStyle->shapeStyle->width.'px;'.PHP_EOL.
'text-align: center;'.PHP_EOL.
'}'.PHP_EOL.
'</style>';
}
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