/**
* Decode string and generate a full SVG document.
*
* @uses DOMDocument
* @param string $encoded - Encoded polyline
* @return string - SVG document
*/
public static function DecodeToSVG($encoded)
{
// Create list of points
$points = parent::Decode($encoded);
// Grab first pair
list($x, $y) = self::shiftPoint($points);
// Path will need to start by moving to first coordinate.
$path = sprintf('M %f %f L ', $x, $y);
// Init bounding box's min & max.
$minX = $maxX = $x;
$minY = $maxY = $y;
while ($points) {
// This can be simplified with php-5.5's generators.
list($x, $y) = self::shiftPoint($points);
$path .= sprintf('%f %f, ', $x, $y);
// Grow MBR
if ($x < $minX) {
$minX = $x;
}
if ($y < $minY) {
$minY = $y;
}
if ($x > $maxX) {
$maxX = $x;
}
if ($y > $maxY) {
$maxY = $y;
}
}
// Close poylgon
$path = rtrim($path, ', ') . ' Z';
// Create viewBox from MBR points
$mbr = sprintf("%f %f %f %f", $minX, $minY, abs($maxX - $minX), abs($maxY - $minY));
return self::generateSVG($path, $mbr);
}
public function testRounding()
{
$originalPoints = array(48.000006, 2.000004, 48.00001, 2.0);
$encoded = Polyline::Encode($originalPoints);
$this->assertEquals('a_~cH_seK??', $encoded);
$decodedPoints = Polyline::Decode($encoded);
$this->assertTrue($decodedPoints[0] === $decodedPoints[2]);
$this->assertTrue($decodedPoints[1] === $decodedPoints[3]);
}
/**
* @covers Polyline::Decode
*/
public function testDecode()
{
$this->assertCount(count($this->points) * 2, Polyline::Decode($this->encoded));
}
