mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/ImageMap
synced 2024-11-15 18:29:27 +00:00
280 lines
7.8 KiB
PHP
280 lines
7.8 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Image map extension.
|
|
*
|
|
* Syntax:
|
|
* <imagemap>
|
|
* Image:Foo.jpg | 100px | picture of a foo
|
|
*
|
|
* rect 0 0 50 50 [[Foo type A]]
|
|
* circle 50 50 20 [[Foo type B]]
|
|
*
|
|
* desc bottom-left
|
|
* </imagemap>
|
|
*
|
|
* Coordinates are relative to the source image, not the thumbnail
|
|
*
|
|
*/
|
|
|
|
require_once( dirname( __FILE__ ) . '/ImageMap.i18n.php' );
|
|
global $wgMessageCache;
|
|
foreach( efImageMapMessages() as $lang => $messages )
|
|
$wgMessageCache->addMessages( $messages, $lang );
|
|
|
|
class ImageMap {
|
|
static public $id = 0;
|
|
|
|
const TOP_RIGHT = 0;
|
|
const BOTTOM_RIGHT = 1;
|
|
const BOTTOM_LEFT = 2;
|
|
const TOP_LEFT = 3;
|
|
const NONE = 4;
|
|
|
|
static function render( $input, $params, $parser ) {
|
|
global $wgScriptPath;
|
|
|
|
$lines = explode( "\n", $input );
|
|
|
|
$first = true;
|
|
$lineNum = 0;
|
|
$output = '';
|
|
$links = array();
|
|
$descType = self::BOTTOM_RIGHT;
|
|
$defaultLinkAttribs = false;
|
|
foreach ( $lines as $line ) {
|
|
++$lineNum;
|
|
|
|
$line = trim( $line );
|
|
if ( $line == '' || $line[0] == '#' ) {
|
|
continue;
|
|
}
|
|
|
|
if ( $first ) {
|
|
$first = false;
|
|
|
|
# The first line should have an image specification on it
|
|
# Extract it and render the HTML
|
|
$bits = explode( '|', $line, 2 );
|
|
if ( count( $bits ) == 1 ) {
|
|
$image = $bits[0];
|
|
$options = '';
|
|
} else {
|
|
list( $image, $options ) = $bits;
|
|
}
|
|
$imageTitle = Title::newFromText( $image );
|
|
if ( !$imageTitle || $imageTitle->getNamespace() != NS_IMAGE ) {
|
|
return self::error( 'imagemap_no_image' );
|
|
}
|
|
$imageHTML = $parser->makeImage( $imageTitle, $options );
|
|
|
|
$domDoc = DOMDocument::loadXML( $imageHTML );
|
|
$xpath = new DOMXPath( $domDoc );
|
|
$imgs = $xpath->query( '//img' );
|
|
if ( !$imgs->length ) {
|
|
return self::error( 'imagemap_invalid_image' );
|
|
}
|
|
$imageNode = $imgs->item(0);
|
|
$thumbWidth = $imageNode->getAttribute('width');
|
|
$thumbHeight = $imageNode->getAttribute('height');
|
|
|
|
$imageObj = new Image( $imageTitle );
|
|
# Add the linear dimensions to avoid inaccuracy in the scale
|
|
# factor when one is much larger than the other
|
|
# (sx+sy)/(x+y) = s
|
|
$denominator = $imageObj->getWidth() + $imageObj->getHeight();
|
|
$numerator = $thumbWidth + $thumbHeight;
|
|
if ( $denominator <= 0 || $numerator <= 0 ) {
|
|
return self::error( 'imagemap_invalid_image' );
|
|
}
|
|
$scale = $numerator / $denominator;
|
|
continue;
|
|
}
|
|
|
|
# Handle desc spec
|
|
$cmd = strtok( $line, " \t" );
|
|
if ( $cmd == 'desc' ) {
|
|
$typesText = wfMsgForContent( 'imagemap_desc_types' );
|
|
$types = array_map( 'trim', explode( ',', $typesText ) );
|
|
$type = trim( strtok( '' ) );
|
|
$descType = array_search( $type, $types );
|
|
if ( $descType === false ) {
|
|
return self::error( 'imagemap_invalid_desc', $typesText );
|
|
}
|
|
continue;
|
|
}
|
|
|
|
# Find the link
|
|
$link = trim( strstr( $line, '[[' ) );
|
|
if ( preg_match( '/^ \[\[ ([^|]*+) \| ([^\]]*+) \]\] \w* $ /x', $link, $m ) ) {
|
|
$title = Title::newFromText( $m[1] );
|
|
$alt = trim( $m[2] );
|
|
} elseif ( preg_match( '/^ \[\[ ([^\]]*+) \]\] \w* $ /x', $link, $m ) ) {
|
|
$title = Title::newFromText( $m[1] );
|
|
$alt = $title->getFullText();
|
|
} else {
|
|
return self::error( 'imagemap_no_link', $lineNum );
|
|
}
|
|
if ( !$title ) {
|
|
return self::error( 'imagemap_invalid_title', $lineNum );
|
|
}
|
|
|
|
$shapeSpec = substr( $line, 0, -strlen( $link ) );
|
|
|
|
# Tokenize shape spec
|
|
$shape = strtok( $shapeSpec, " \t" );
|
|
switch ( $shape ) {
|
|
case 'default':
|
|
$coords = array();
|
|
break;
|
|
case 'rect':
|
|
$coords = self::tokenizeCoords( 4, $lineNum );
|
|
if ( !is_array( $coords ) ) {
|
|
return $coords;
|
|
}
|
|
break;
|
|
case 'circle':
|
|
$coords = self::tokenizeCoords( 3, $lineNum );
|
|
if ( !is_array( $coords ) ) {
|
|
return $coords;
|
|
}
|
|
break;
|
|
case 'poly':
|
|
$coord = strtok( " \t" );
|
|
while ( $coord !== false ) {
|
|
$coords[] = $coord;
|
|
$coord = strtok( " \t" );
|
|
}
|
|
if ( !count( $coords ) ) {
|
|
return self::error( 'imagemap_missing_coord', $lineNum );
|
|
}
|
|
break;
|
|
default:
|
|
return self::error( 'imagemap_unrecognised_shape', $lineNum );
|
|
}
|
|
|
|
# Scale the coords using the size of the source image
|
|
foreach ( $coords as $i => $c ) {
|
|
$coords[$i] *= $scale;
|
|
}
|
|
|
|
# Construct the area tag
|
|
$attribs = array(
|
|
'href' => $title->escapeLocalURL(),
|
|
);
|
|
if ( $shape != 'default' ) {
|
|
$attribs['shape'] = $shape;
|
|
}
|
|
if ( $coords ) {
|
|
$attribs['coords'] = implode( ',', $coords );
|
|
}
|
|
if ( $alt != '' ) {
|
|
if ( $shape != 'default' ) {
|
|
$attribs['alt'] = $alt;
|
|
}
|
|
$attribs['title'] = $alt;
|
|
}
|
|
if ( $shape == 'default' ) {
|
|
$defaultLinkAttribs = $attribs;
|
|
} else {
|
|
$output .= Xml::element( 'area', $attribs ) . "\n";
|
|
}
|
|
$links[] = $title;
|
|
}
|
|
|
|
if ( $first ) {
|
|
return self::error( 'imagemap_no_image' );
|
|
}
|
|
|
|
if ( $output == '' ) {
|
|
return self::error( 'imagemap_no_areas' );
|
|
}
|
|
|
|
# Construct the map
|
|
$mapName = "ImageMap_" . ++self::$id;
|
|
$output = "<map name=\"$mapName\">\n$output</map>\n";
|
|
|
|
# Alter the image tag
|
|
$imageNode->setAttribute( 'usemap', "#$mapName" );
|
|
|
|
# Add a surrounding div, remove the default link to the description page
|
|
$anchor = $imageNode->parentNode;
|
|
$parent = $anchor->parentNode;
|
|
$div = $parent->insertBefore( new DOMElement( 'div' ), $anchor );
|
|
$div->setAttribute( 'style', 'position: relative;' );
|
|
if ( $defaultLinkAttribs ) {
|
|
$defaultAnchor = $div->appendChild( new DOMElement( 'a' ) );
|
|
foreach ( $defaultLinkAttribs as $name => $value ) {
|
|
$defaultAnchor->setAttribute( $name, $value );
|
|
}
|
|
$imageParent = $defaultAnchor;
|
|
} else {
|
|
$imageParent = $div;
|
|
}
|
|
|
|
$imageParent->appendChild( $imageNode->cloneNode( true ) );
|
|
$parent->removeChild( $anchor );
|
|
|
|
# Determine whether a "magnify" link is present
|
|
$xpath = new DOMXPath( $domDoc );
|
|
$magnify = $xpath->query( '//div[@class="magnify"]' );
|
|
if ( !$magnify->length && $descType != self::NONE ) {
|
|
# Add image description link
|
|
if ( $descType == self::TOP_LEFT || $descType == self::BOTTOM_LEFT ) {
|
|
$descLeft = 0;
|
|
} else {
|
|
$descLeft = $thumbWidth - 20;
|
|
}
|
|
if ( $descType == self::TOP_LEFT || $descType == self::TOP_RIGHT ) {
|
|
$descTop = 0;
|
|
} else {
|
|
$descTop = $thumbHeight - 20;
|
|
}
|
|
$descAnchor = $div->appendChild( new DOMElement( 'a' ) );
|
|
$descAnchor->setAttribute( 'href', $imageTitle->escapeLocalURL() );
|
|
$descAnchor->setAttribute( 'title', wfMsgForContent( 'imagemap_description' ) );
|
|
$descAnchor->setAttribute( 'style', "position:absolute; top: {$descTop}px; left: {$descLeft}px;" );
|
|
$descImg = $descAnchor->appendChild( new DOMElement( 'img' ) );
|
|
$descImg->setAttribute( 'alt', wfMsgForContent( 'imagemap_description' ) );
|
|
$descImg->setAttribute( 'src', "$wgScriptPath/extensions/ImageMap/desc-20.png" );
|
|
$descImg->setAttribute( 'style', 'border: none;' );
|
|
}
|
|
|
|
# Output the result
|
|
# We use saveXML() not saveHTML() because then we get XHTML-compliant output.
|
|
# The disadvantage is that we have to strip out the DTD
|
|
$output .= preg_replace( '/<\?xml[^?]*\?>/', '', $domDoc->saveXML() );
|
|
|
|
# Register links
|
|
$parser->mOutput->addImage( $imageTitle->getDBkey() );
|
|
foreach ( $links as $title ) {
|
|
$parser->mOutput->addLink( $title );
|
|
}
|
|
|
|
# Armour output against broken parser
|
|
$output = str_replace( "\n", '', $output );
|
|
return $output;
|
|
}
|
|
|
|
static function tokenizeCoords( $count, $lineNum ) {
|
|
$coords = array();
|
|
for ( $i = 0; $i < $count; $i++ ) {
|
|
$coord = strtok( " \t" );
|
|
if ( $coord === false ) {
|
|
return self::error( 'imagemap_missing_coord', $lineNum );
|
|
}
|
|
if ( !is_numeric( $coord ) || $coord > 1e9 || $coord < 0 ) {
|
|
return self::error( 'imagemap_invalid_coord', $lineNum );
|
|
}
|
|
$coords[$i] = $coord;
|
|
}
|
|
return $coords;
|
|
}
|
|
|
|
static function error( $name, $line = false ) {
|
|
return wfMsgForContent( $name, $line );
|
|
}
|
|
}
|
|
|
|
?>
|