/**
* Compatible with PHP getimagesize()
* @todo support gzipped SVGZ
* @todo check XML more carefully
* @todo sensible defaults
*
* @param $filename String: full name of the file (passed to php fopen()).
* @return array
*/
function wfGetSVGsize($filename)
{
$width = 256;
$height = 256;
// Read a chunk of the file
$f = fopen($filename, "rt");
if (!$f) {
return false;
}
$chunk = fread($f, 4096);
fclose($f);
// Uber-crappy hack! Run through a real XML parser.
$matches = array();
if (!preg_match('/<svg\\s*([^>]*)\\s*>/s', $chunk, $matches)) {
return false;
}
$tag = $matches[1];
if (preg_match('/\\bwidth\\s*=\\s*("[^"]+"|\'[^\']+\')/s', $tag, $matches)) {
$width = wfScaleSVGUnit(trim(substr($matches[1], 1, -1)));
}
if (preg_match('/\\bheight\\s*=\\s*("[^"]+"|\'[^\']+\')/s', $tag, $matches)) {
$height = wfScaleSVGUnit(trim(substr($matches[1], 1, -1)));
}
return array($width, $height, 'SVG', "width=\"{$width}\" height=\"{$height}\"");
}
function filter($name, $attribs)
{
if ($this->first) {
$defaultWidth = self::DEFAULT_WIDTH;
$defaultHeight = self::DEFAULT_HEIGHT;
$aspect = 1.0;
$width = null;
$height = null;
if (isset($attribs['viewBox'])) {
// min-x min-y width height
$viewBox = preg_split('/\\s+/', trim($attribs['viewBox']));
if (count($viewBox) == 4) {
$viewWidth = wfScaleSVGUnit($viewBox[2]);
$viewHeight = wfScaleSVGUnit($viewBox[3]);
if ($viewWidth > 0 && $viewHeight > 0) {
$aspect = $viewWidth / $viewHeight;
$defaultHeight = $defaultWidth / $aspect;
}
}
}
if (isset($attribs['width'])) {
$width = wfScaleSVGUnit($attribs['width'], $defaultWidth);
}
if (isset($attribs['height'])) {
$height = wfScaleSVGUnit($attribs['height'], $defaultHeight);
}
if (!isset($width) && !isset($height)) {
$width = $defaultWidth;
$height = $width / $aspect;
} elseif (isset($width) && !isset($height)) {
$height = $width / $aspect;
} elseif (isset($height) && !isset($width)) {
$width = $height * $aspect;
}
if ($width > 0 && $height > 0) {
$this->width = intval(round($width));
$this->height = intval(round($height));
}
$this->first = false;
}
}
