<?php
/**
- * Return a rounded pixel equivalent for a labeled CSS/SVG length.
- * http://www.w3.org/TR/SVG11/coords.html#UnitIdentifiers
+ * Global functions related to images
*
- * @param $length String: CSS/SVG length.
- * @return Integer: length in pixels
+ * @file
*/
-function wfScaleSVGUnit( $length ) {
- static $unitLength = array(
- 'px' => 1.0,
- 'pt' => 1.25,
- 'pc' => 15.0,
- 'mm' => 3.543307,
- 'cm' => 35.43307,
- 'in' => 90.0,
- '' => 1.0, // "User units" pixels by default
- '%' => 2.0, // Fake it!
- );
- $matches = array();
- if( preg_match( '/^(\d+(?:\.\d+)?)(em|ex|px|pt|pc|cm|mm|in|%|)$/', $length, $matches ) ) {
- $length = floatval( $matches[1] );
- $unit = $matches[2];
- return round( $length * $unitLength[$unit] );
- } else {
- // Assume pixels
- return round( floatval( $length ) );
- }
-}
-
-/**
- * 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\"" );
-}
/**
* Determine if an image exists on the 'bad image list'.
* * Any subsequent links on the same line are considered to be exceptions,
* i.e. articles where the image may occur inline.
*
- * @param string $name the image name to check
- * @param Title $contextTitle The page on which the image occurs, if known
+ * @param $name string the image name to check
+ * @param $contextTitle Title|bool the page on which the image occurs, if known
+ * @param $blacklist string wikitext of a file blacklist
* @return bool
*/
-function wfIsBadImage( $name, $contextTitle = false ) {
- static $badImages = false;
+function wfIsBadImage( $name, $contextTitle = false, $blacklist = null ) {
+ static $badImageCache = null; // based on bad_image_list msg
wfProfileIn( __METHOD__ );
+ # Handle redirects
+ $redirectTitle = RepoGroup::singleton()->checkRedirect( Title::makeTitle( NS_FILE, $name ) );
+ if( $redirectTitle ) {
+ $name = $redirectTitle->getDbKey();
+ }
+
# Run the extension hook
$bad = false;
if( !wfRunHooks( 'BadImage', array( $name, &$bad ) ) ) {
wfProfileOut( __METHOD__ );
return $bad;
}
-
- if( !$badImages ) {
+
+ $cacheable = ( $blacklist === null );
+ if( $cacheable && $badImageCache !== null ) {
+ $badImages = $badImageCache;
+ } else { // cache miss
+ if ( $blacklist === null ) {
+ $blacklist = wfMsgForContentNoTrans( 'bad_image_list' ); // site list
+ }
# Build the list now
$badImages = array();
- $lines = explode( "\n", wfMsgForContentNoTrans( 'bad_image_list' ) );
+ $lines = explode( "\n", $blacklist );
foreach( $lines as $line ) {
# List items only
if ( substr( $line, 0, 1 ) !== '*' ) {
$badImages[$imageDBkey] = $exceptions;
}
}
+ if ( $cacheable ) {
+ $badImageCache = $badImages;
+ }
}
-
+
$contextKey = $contextTitle ? $contextTitle->getPrefixedDBkey() : false;
$bad = isset( $badImages[$name] ) && !isset( $badImages[$name][$contextKey] );
wfProfileOut( __METHOD__ );
return $bad;
}
-
-/**
- * Calculate the largest thumbnail width for a given original file size
- * such that the thumbnail's height is at most $maxHeight.
- * @param $boxWidth Integer Width of the thumbnail box.
- * @param $boxHeight Integer Height of the thumbnail box.
- * @param $maxHeight Integer Maximum height expected for the thumbnail.
- * @return Integer.
- */
-function wfFitBoxWidth( $boxWidth, $boxHeight, $maxHeight ) {
- $idealWidth = $boxWidth * $maxHeight / $boxHeight;
- $roundedUp = ceil( $idealWidth );
- if( round( $roundedUp * $boxHeight / $boxWidth ) > $maxHeight )
- return floor( $idealWidth );
- else
- return $roundedUp;
-}
-
-
-