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#!/usr/bin/env php
<?php
// Copyright 2008, Google Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// 3. Neither the name of Google Inc. nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This program demonstrates use of the KML DOM PHP SWIG bindings for
// walking the feature hierarchy of a KML file.
// This example uses the SWIG-generated PHP5 wrapper. This has the benefit
// of allowing access to the class hierarchy reflected from the source C++
// classes. For example, using the wrapper you can query a placemark's
// visibility by calling $placemark->has_visibility(). If you're accessing
// the raw extension module, SWIG's flattening of the object structure will
// require you to know that Placemark inherits from Feature and thus you have
// to call Feature_has_visibility($placemark). To see an example of this
// alternate use, see helloplacemark_module.php
if (!file_exists("kmldom.php")) {
echo "Before you run the examples you first have to run the\n";
echo "tweak_generated_kmldom.php script. See README for more details\n";
exit(1);
}
require 'load_kmldom.php'; // Loads the extension module.
require 'kmldom.php'; // Loads our tweaked SWIG PHP wrapper.
function ReadKmlFile($filename) {
$f = fopen($filename, "r");
$data = fread($f, filesize($filename));
fclose($f);
return $data;
}
function Indent($depth) {
while ($depth > 0) {
print ' ';
$depth -= 1;
}
}
function PrFeatureType($type) {
if ($type == kmldom::Type_Placemark) {
print("Placemark ");
} else {
print("some other Feature ");
}
}
// This visits a feature. The type of feature is printed. If the feature
// is a container such is visited recursively.
function VisitFeature($feature, $depth) {
Indent($depth);
PrFeatureType($feature->Type());
printf("id = %d\n", $feature->id());
$container = kmldom::AsContainer($feature);
if ($container) {
WalkContainer($container, $depth+1);
}
}
// This visits each feature in the given container (<Document> or <Folder>).
function WalkContainer($container, $depth) {
for ($i = 0; $i < $container->feature_array_size(); $i++) {
VisitFeature($container->feature_array_at($i), $depth);
}
}
// The root feature of a KML file is the child feature of the <kml>
// element or the root xml element if that is a Feature.
// If element is neither <kml> nor a feature None is returned.
function GetRootFeature($element) {
$kml = kmldom::AsKml($element);
if ($kml) {
if ($kml->has_feature()) {
return $kml->feature();
} else {
return NULL;
}
}
$feature = kmldom::AsFeature($element);
if ($feature) {
return $feature;
}
return NULL;
}
function main($inputkml) {
$feature = GetRootFeature(kmldom::ParseKml(ReadKmlFile($inputkml)));
if ($feature) {
VisitFeature($feature, 0);
KmlFactory::GetFactory()->DeleteElement($feature);
# PHP deletes the feature returned from ParseKml which in turn deletes
# all child elements.
} else {
// The file is a KML fragment.
echo "No root feature in $inputkml\n";
}
}
if ($argc != 2) {
echo "usage: $argv[0] input.kml\n";
exit(1);
}
main($argv[1]);
?>
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