<?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.
- * @param $viewportSize: Float optional scale for percentage units...
- * @return float: length in pixels
+ * @file
*/
-function wfScaleSVGUnit( $length, $viewportSize=512 ) {
- static $unitLength = array(
- 'px' => 1.0,
- 'pt' => 1.25,
- 'pc' => 15.0,
- 'mm' => 3.543307,
- 'cm' => 35.43307,
- 'in' => 90.0,
- 'em' => 16.0, // fake it?
- 'ex' => 12.0, // fake it?
- '' => 1.0, // "User units" pixels by default
- );
- $matches = array();
- if( preg_match( '/^\s*(\d+(?:\.\d+)?)(em|ex|px|pt|pc|cm|mm|in|%|)\s*$/', $length, $matches ) ) {
- $length = floatval( $matches[1] );
- $unit = $matches[2];
- if( $unit == '%' ) {
- return $length * 0.01 * $viewportSize;
- } else {
- return $length * $unitLength[$unit];
- }
- } else {
- // Assume pixels
- return floatval( $length );
- }
-}
-
-class XmlSizeFilter {
- const DEFAULT_WIDTH = 512;
- const DEFAULT_HEIGHT = 512;
- var $first = true;
- var $width = self::DEFAULT_WIDTH;
- var $height = self::DEFAULT_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;
- }
- }
-}
-
-/**
- * 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 ) {
- $filter = new XmlSizeFilter();
- $xml = new XmlTypeCheck( $filename, array( $filter, 'filter' ) );
- if( $xml->wellFormed ) {
- return array( $filter->width, $filter->height, 'SVG',
- "width=\"$filter->width\" height=\"$filter->height\"" );
- }
-
- return false;
-}
/**
* Determine if an image exists on the 'bad image list'.
* i.e. articles where the image may occur inline.
*
* @param $name string the image name to check
- * @param $contextTitle Title: the page on which the image occurs, if known
+ * @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;
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;
-}