* (bug 12938) Fix template expansion and 404 returns for action=raw with section
[lhc/web/wiklou.git] / includes / Linker.php
index bd5b413..cd9c31c 100644 (file)
  * @addtogroup Skins
  */
 class Linker {
+
+       /**
+        * Flags for userToolLinks()
+        */
+       const TOOL_LINKS_NOBLOCK = 1;
+
        function __construct() {}
 
        /**
@@ -46,19 +52,11 @@ class Linker {
        }
 
        /** @todo document */
-       function getInternalLinkAttributes( $link, $text, $broken = false ) {
+       function getInternalLinkAttributes( $link, $text, $class='' ) {
                $link = urldecode( $link );
                $link = str_replace( '_', ' ', $link );
                $link = htmlspecialchars( $link );
-
-               if( $broken == 'stub' ) {
-                       $r = ' class="stub"';
-               } else if ( $broken == 'yes' ) {
-                       $r = ' class="new"';
-               } else {
-                       $r = '';
-               }
-
+               $r = ($class != '') ? ' class="' . htmlspecialchars( $class ) . '"' : '';
                $r .= " title=\"{$link}\"";
                return $r;
        }
@@ -66,21 +64,37 @@ class Linker {
        /**
         * @param $nt Title object.
         * @param $text String: FIXME
-        * @param $broken Boolean: FIXME, default 'false'.
+        * @param $class String: CSS class of the link, default ''.
         */
-       function getInternalLinkAttributesObj( &$nt, $text, $broken = false ) {
-               if( $broken == 'stub' ) {
-                       $r = ' class="stub"';
-               } else if ( $broken == 'yes' ) {
-                       $r = ' class="new"';
-               } else {
-                       $r = '';
-               }
-
+       function getInternalLinkAttributesObj( &$nt, $text, $class='' ) {
+               $r = ($class != '') ? ' class="' . htmlspecialchars( $class ) . '"' : '';
                $r .= ' title="' . $nt->getEscapedText() . '"';
                return $r;
        }
 
+       /**
+        * Return the CSS colour of a known link
+        *
+        * @param mixed $s
+        * @param integer $threshold user defined threshold
+        * @return string CSS class
+        */
+       function getLinkColour( $s, $threshold ) {
+               if( $s == false ) {
+                       return '';
+               }
+
+               $colour = '';
+               if ( !empty( $s->page_is_redirect ) ) {
+                       # Page is a redirect
+                       $colour = 'mw-redirect';
+               } elseif ( $threshold > 0 && $s->page_len < $threshold && Namespace::isContent( $s->page_namespace ) ) {
+                       # Page is a stub
+                       $colour = 'stub';
+               }
+               return $colour;
+       }
+
        /**
         * This function is a shortcut to makeLinkObj(Title::newFromText($title),...). Do not call
         * it if you already have a title object handy. See makeLinkObj for further documentation.
@@ -93,16 +107,16 @@ class Linker {
         *                      the end of the link.
         */
        function makeLink( $title, $text = '', $query = '', $trail = '' ) {
-               wfProfileIn( 'Linker::makeLink' );
+               wfProfileIn( __METHOD__ );
                $nt = Title::newFromText( $title );
-               if ($nt) {
-                       $result = $this->makeLinkObj( Title::newFromText( $title ), $text, $query, $trail );
+               if ( $nt instanceof Title ) {
+                       $result = $this->makeLinkObj( $nt, $text, $query, $trail );
                } else {
                        wfDebug( 'Invalid title passed to Linker::makeLink(): "'.$title."\"\n" );
                        $result = $text == "" ? $title : $text;
                }
 
-               wfProfileOut( 'Linker::makeLink' );
+               wfProfileOut( __METHOD__ );
                return $result;
        }
 
@@ -119,8 +133,8 @@ class Linker {
         */
        function makeKnownLink( $title, $text = '', $query = '', $trail = '', $prefix = '',$aprops = '') {
                $nt = Title::newFromText( $title );
-               if ($nt) {
-                       return $this->makeKnownLinkObj( Title::newFromText( $title ), $text, $query, $trail, $prefix , $aprops );
+               if ( $nt instanceof Title ) {
+                       return $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix , $aprops );
                } else {
                        wfDebug( 'Invalid title passed to Linker::makeKnownLink(): "'.$title."\"\n" );
                        return $text == '' ? $title : $text;
@@ -140,8 +154,8 @@ class Linker {
         */
        function makeBrokenLink( $title, $text = '', $query = '', $trail = '' ) {
                $nt = Title::newFromText( $title );
-               if ($nt) {
-                       return $this->makeBrokenLinkObj( Title::newFromText( $title ), $text, $query, $trail );
+               if ( $nt instanceof Title ) {
+                       return $this->makeBrokenLinkObj( $nt, $text, $query, $trail );
                } else {
                        wfDebug( 'Invalid title passed to Linker::makeBrokenLink(): "'.$title."\"\n" );
                        return $text == '' ? $title : $text;
@@ -149,6 +163,8 @@ class Linker {
        }
 
        /**
+        * @deprecated use makeColouredLinkObj
+        * 
         * This function is a shortcut to makeStubLinkObj(Title::newFromText($title),...). Do not call
         * it if you already have a title object handy. See makeStubLinkObj for further documentation.
         * 
@@ -161,8 +177,8 @@ class Linker {
         */
        function makeStubLink( $title, $text = '', $query = '', $trail = '' ) {
                $nt = Title::newFromText( $title );
-               if ($nt) {
-                       return $this->makeStubLinkObj( Title::newFromText( $title ), $text, $query, $trail );
+               if ( $nt instanceof Title ) {
+                       return $this->makeStubLinkObj( $nt, $text, $query, $trail );
                } else {
                        wfDebug( 'Invalid title passed to Linker::makeStubLink(): "'.$title."\"\n" );
                        return $text == '' ? $title : $text;
@@ -185,13 +201,11 @@ class Linker {
         */
        function makeLinkObj( $nt, $text= '', $query = '', $trail = '', $prefix = '' ) {
                global $wgUser;
-               $fname = 'Linker::makeLinkObj';
-               wfProfileIn( $fname );
+               wfProfileIn( __METHOD__ );
 
-               # Fail gracefully
-               if ( ! is_object($nt) ) {
-                       # throw new MWException();
-                       wfProfileOut( $fname );
+               if ( !$nt instanceof Title ) {
+                       # Fail gracefully
+                       wfProfileOut( __METHOD__ );
                        return "<!-- ERROR -->{$prefix}{$text}{$trail}";
                }
 
@@ -211,41 +225,48 @@ class Linker {
                        }
                        $t = "<a href=\"{$u}\"{$style}>{$text}{$inside}</a>";
 
-                       wfProfileOut( $fname );
+                       wfProfileOut( __METHOD__ );
                        return $t;
                } elseif ( $nt->isAlwaysKnown() ) {
                        # Image links, special page links and self-links with fragements are always known.
                        $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
                } else {
-                       wfProfileIn( $fname.'-immediate' );
+                       wfProfileIn( __METHOD__.'-immediate' );
+
+                       # Handles links to special pages which do not exist in the database:
+                       if( $nt->getNamespace() == NS_SPECIAL ) {
+                               if( SpecialPage::exists( $nt->getDBkey() ) ) {
+                                       $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
+                               } else {
+                                       $retVal = $this->makeBrokenLinkObj( $nt, $text, $query, $trail, $prefix );
+                               }
+                               wfProfileOut( __METHOD__.'-immediate' );
+                               wfProfileOut( __METHOD__ );
+                               return $retVal;
+                       }
+
                        # Work out link colour immediately
                        $aid = $nt->getArticleID() ;
                        if ( 0 == $aid ) {
                                $retVal = $this->makeBrokenLinkObj( $nt, $text, $query, $trail, $prefix );
                        } else {
-                               $stub = false;
+                               $colour = '';
                                if ( $nt->isContentPage() ) {
+                                       # FIXME: This is stupid, we should combine this query with
+                                       # the Title::getArticleID() query above.
                                        $threshold = $wgUser->getOption('stubthreshold');
-                                       if ( $threshold > 0 ) {
-                                               $dbr = wfGetDB( DB_SLAVE );
-                                               $s = $dbr->selectRow(
-                                                       array( 'page' ),
-                                                       array( 'page_len',
-                                                              'page_is_redirect' ),
-                                                       array( 'page_id' => $aid ), $fname ) ;
-                                               $stub = ( $s !== false && !$s->page_is_redirect &&
-                                                         $s->page_len < $threshold );
-                                       }
-                               }
-                               if ( $stub ) {
-                                       $retVal = $this->makeStubLinkObj( $nt, $text, $query, $trail, $prefix );
-                               } else {
-                                       $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
+                                       $dbr = wfGetDB( DB_SLAVE );
+                                       $s = $dbr->selectRow(
+                                               array( 'page' ),
+                                               array( 'page_len', 'page_is_redirect', 'page_namespace' ),
+                                               array( 'page_id' => $aid ), __METHOD__ ) ;
+                                       $colour = $this->getLinkColour( $s, $threshold );
                                }
+                               $retVal = $this->makeColouredLinkObj( $nt, $colour, $text, $query, $trail, $prefix );
                        }
-                       wfProfileOut( $fname.'-immediate' );
+                       wfProfileOut( __METHOD__.'-immediate' );
                }
-               wfProfileOut( $fname );
+               wfProfileOut( __METHOD__ );
                return $retVal;
        }
 
@@ -264,13 +285,12 @@ class Linker {
         * @return the a-element
         */
        function makeKnownLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' , $aprops = '', $style = '' ) {
+               wfProfileIn( __METHOD__ );
 
-               $fname = 'Linker::makeKnownLinkObj';
-               wfProfileIn( $fname );
-
-               if ( !is_object( $nt ) ) {
-                       wfProfileOut( $fname );
-                       return $text;
+               if ( !$nt instanceof Title ) {
+                       # Fail gracefully
+                       wfProfileOut( __METHOD__ );
+                       return "<!-- ERROR -->{$prefix}{$text}{$trail}";
                }
 
                $u = $nt->escapeLocalURL( $query );
@@ -294,14 +314,14 @@ class Linker {
 
                list( $inside, $trail ) = Linker::splitTrail( $trail );
                $r = "<a href=\"{$u}\"{$style}{$aprops}>{$prefix}{$text}{$inside}</a>{$trail}";
-               wfProfileOut( $fname );
+               wfProfileOut( __METHOD__ );
                return $r;
        }
 
        /**
         * Make a red link to the edit page of a given title.
         * 
-        * @param $title String: The text of the title
+        * @param $nt Title object of the target page
         * @param $text  String: Link text
         * @param $query String: Optional query part
         * @param $trail String: Optional trail. Alphabetic characters at the start of this string will
@@ -309,16 +329,17 @@ class Linker {
         *                      the end of the link.
         */
        function makeBrokenLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
-               # Fail gracefully
-               if ( ! isset($nt) ) {
-                       # throw new MWException();
+               wfProfileIn( __METHOD__ );
+
+               if ( !$nt instanceof Title ) {
+                       # Fail gracefully
+                       wfProfileOut( __METHOD__ );
                        return "<!-- ERROR -->{$prefix}{$text}{$trail}";
                }
 
-               $fname = 'Linker::makeBrokenLinkObj';
-               wfProfileIn( $fname );
-
-               if ( '' == $query ) {
+               if( $nt->getNamespace() == NS_SPECIAL ) {
+                       $q = $query;
+               } else if ( '' == $query ) {
                        $q = 'action=edit';
                } else {
                        $q = 'action=edit&'.$query;
@@ -328,19 +349,21 @@ class Linker {
                if ( '' == $text ) {
                        $text = htmlspecialchars( $nt->getPrefixedText() );
                }
-               $style = $this->getInternalLinkAttributesObj( $nt, $text, "yes" );
+               $style = $this->getInternalLinkAttributesObj( $nt, $text, 'new' );
 
                list( $inside, $trail ) = Linker::splitTrail( $trail );
                $s = "<a href=\"{$u}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 
-               wfProfileOut( $fname );
+               wfProfileOut( __METHOD__ );
                return $s;
        }
 
        /**
+        * @deprecated use makeColouredLinkObj
+        * 
         * Make a brown link to a short article.
         * 
-        * @param $title String: the text of the title
+        * @param $nt Title object of the target page
         * @param $text  String: link text
         * @param $query String: optional query part
         * @param $trail String: optional trail. Alphabetic characters at the start of this string will
@@ -348,7 +371,25 @@ class Linker {
         *                      the end of the link.
         */
        function makeStubLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
-               $style = $this->getInternalLinkAttributesObj( $nt, $text, 'stub' );
+               return $this->makeColouredLinkObj( $nt, 'stub', $text, $query, $trail, $prefix );
+       }
+
+       /**
+        * Make a coloured link.
+        * 
+        * @param $nt Title object of the target page
+        * @param $colour Integer: colour of the link
+        * @param $text   String:  link text
+        * @param $query  String:  optional query part
+        * @param $trail  String:  optional trail. Alphabetic characters at the start of this string will
+        *                      be included in the link text. Other characters will be appended after
+        *                      the end of the link.
+        */
+       function makeColouredLinkObj( $nt, $colour, $text = '', $query = '', $trail = '', $prefix = '' ) {
+
+               if($colour != ''){
+                       $style = $this->getInternalLinkAttributesObj( $nt, $text, $colour );
+               } else $style = '';
                return $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix, '', $style );
        }
 
@@ -367,11 +408,8 @@ class Linker {
        function makeSizeLinkObj( $size, $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
                global $wgUser;
                $threshold = intval( $wgUser->getOption( 'stubthreshold' ) );
-               if( $size < $threshold ) {
-                       return $this->makeStubLinkObj( $nt, $text, $query, $trail, $prefix );
-               } else {
-                       return $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
-               }
+               $colour = ( $size < $threshold ) ? 'stub' : '';
+               return $this->makeColouredLinkObj( $nt, $colour, $text, $query, $trail, $prefix );
        }
 
        /** 
@@ -412,31 +450,98 @@ class Linker {
                return $s;
        }
 
-       /** @todo document */
-       function makeImageLinkObj( $nt, $label, $alt, $align = '', $params = array(), $framed = false,
-         $thumb = false, $manual_thumb = '', $valign = '', $upright = false, $upright_factor = 0 )
+       /** 
+        * Creates the HTML source for images
+        * @deprecated use makeImageLink2
+        *
+        * @param object $title
+        * @param string $label label text
+        * @param string $alt alt text
+        * @param string $align horizontal alignment: none, left, center, right)
+        * @param array $handlerParams Parameters to be passed to the media handler
+        * @param boolean $framed shows image in original size in a frame
+        * @param boolean $thumb shows image as thumbnail in a frame
+        * @param string $manualthumb image name for the manual thumbnail
+        * @param string $valign vertical alignment: baseline, sub, super, top, text-top, middle, bottom, text-bottom
+        * @param string $time, timestamp of the file, set as false for current
+        * @return string
+        */
+       function makeImageLinkObj( $title, $label, $alt, $align = '', $handlerParams = array(), $framed = false,
+         $thumb = false, $manualthumb = '', $valign = '', $time = false )
        {
+               $frameParams = array( 'alt' => $alt, 'caption' => $label );
+               if ( $align ) {
+                       $frameParams['align'] = $align;
+               }
+               if ( $framed ) {
+                       $frameParams['framed'] = true;
+               }
+               if ( $thumb ) {
+                       $frameParams['thumbnail'] = true;
+               }
+               if ( $manualthumb ) {
+                       $frameParams['manualthumb'] = $manualthumb;
+               }
+               if ( $valign ) {
+                       $frameParams['valign'] = $valign;
+               }
+               $file = wfFindFile( $title, $time );
+               return $this->makeImageLink2( $title, $file, $frameParams, $handlerParams, $time );
+       }
+
+       /**
+        * Make an image link
+        * @param Title $title Title object
+        * @param File $file File object, or false if it doesn't exist
+        *
+        * @param array $frameParams Associative array of parameters external to the media handler.
+        *     Boolean parameters are indicated by presence or absence, the value is arbitrary and 
+        *     will often be false.
+        *          thumbnail       If present, downscale and frame
+        *          manualthumb     Image name to use as a thumbnail, instead of automatic scaling
+        *          framed          Shows image in original size in a frame
+        *          frameless       Downscale but don't frame
+        *          upright         If present, tweak default sizes for portrait orientation
+        *          upright_factor  Fudge factor for "upright" tweak (default 0.75)
+        *          border          If present, show a border around the image
+        *          align           Horizontal alignment (left, right, center, none)
+        *          valign          Vertical alignment (baseline, sub, super, top, text-top, middle, 
+        *                          bottom, text-bottom)
+        *          alt             Alternate text for image (i.e. alt attribute). Plain text.
+        *          caption         HTML for image caption.
+        *
+        * @param array $handlerParams Associative array of media handler parameters, to be passed 
+        *       to transform(). Typical keys are "width" and "page". 
+        * @param string $time, timestamp of the file, set as false for current
+        */
+       function makeImageLink2( Title $title, $file, $frameParams = array(), $handlerParams = array(), $time = false ) {
                global $wgContLang, $wgUser, $wgThumbLimits, $wgThumbUpright;
+               if ( $file && !$file->allowInlineDisplay() ) {
+                       wfDebug( __METHOD__.': '.$title->getPrefixedDBkey()." does not allow inline display\n" );
+                       return $this->makeKnownLinkObj( $title );
+               }
 
-               $img   = new Image( $nt );
+               // Shortcuts
+               $fp =& $frameParams;
+               $hp =& $handlerParams;
 
-               if ( !$img->allowInlineDisplay() && $img->exists() ) {
-                       return $this->makeKnownLinkObj( $nt );
-               }
+               // Clean up parameters
+               $page = isset( $hp['page'] ) ? $hp['page'] : false;
+               if ( !isset( $fp['align'] ) ) $fp['align'] = '';
+               if ( !isset( $fp['alt'] ) ) $fp['alt'] = '';
 
-               $error = $prefix = $postfix = '';
-               $page = isset( $params['page'] ) ? $params['page'] : false;
+               $prefix = $postfix = '';
 
-               if ( 'center' == $align )
+               if ( 'center' == $fp['align'] )
                {
                        $prefix  = '<div class="center">';
                        $postfix = '</div>';
-                       $align   = 'none';
+                       $fp['align']   = 'none';
                }
+               if ( $file && !isset( $hp['width'] ) ) {
+                       $hp['width'] = $file->getWidth( $page );
 
-               if ( !isset( $params['width'] ) ) {
-                       $params['width'] = $img->getWidth( $page );
-                       if( $thumb || $framed ) {
+                       if( isset( $fp['thumbnail'] ) || isset( $fp['framed'] ) || isset( $fp['frameless'] ) || !$hp['width'] ) {
                                $wopt = $wgUser->getOption( 'thumbsize' );
 
                                if( !isset( $wgThumbLimits[$wopt] ) ) {
@@ -444,16 +549,21 @@ class Linker {
                                }
 
                                // Reduce width for upright images when parameter 'upright' is used
-                               if ( $upright_factor == 0 ) {
-                                       $upright_factor = $wgThumbUpright;
+                               if ( isset( $fp['upright'] ) && $fp['upright'] == 0 ) {
+                                       $fp['upright'] = $wgThumbUpright;
                                }
                                // Use width which is smaller: real image width or user preference width
                                // For caching health: If width scaled down due to upright parameter, round to full __0 pixel to avoid the creation of a lot of odd thumbs
-                               $params['width'] = min( $params['width'], $upright ? round( $wgThumbLimits[$wopt] * $upright_factor, -1 ) : $wgThumbLimits[$wopt] );
+                               $prefWidth = isset( $fp['upright'] ) ? 
+                                       round( $wgThumbLimits[$wopt] * $fp['upright'], -1 ) : 
+                                       $wgThumbLimits[$wopt];
+                               if ( $hp['width'] <= 0 || $prefWidth < $hp['width'] ) {
+                                       $hp['width'] = $prefWidth;
+                               }
                        }
                }
 
-               if ( $thumb || $framed ) {
+               if ( isset( $fp['thumbnail'] ) || isset( $fp['manualthumb'] ) || isset( $fp['framed'] ) ) {
 
                        # Create a thumbnail. Alignment depends on language
                        # writing direction, # right aligned for left-to-right-
@@ -462,164 +572,187 @@ class Linker {
                        #
                        # If  thumbnail width has not been provided, it is set
                        # to the default user option as specified in Language*.php
-                       if ( $align == '' ) {
-                               $align = $wgContLang->isRTL() ? 'left' : 'right';
+                       if ( $fp['align'] == '' ) {
+                               $fp['align'] = $wgContLang->isRTL() ? 'left' : 'right';
                        }
-                       return $prefix.$this->makeThumbLinkObj( $img, $label, $alt, $align, $params, $framed, $manual_thumb, $upright ).$postfix;
+                       return $prefix.$this->makeThumbLink2( $title, $file, $fp, $hp, $time ).$postfix;
                }
 
-               if ( $params['width'] && $img->exists() ) {
-                       # Create a resized image, without the additional thumbnail features
-                       $thumb = $img->transform( $params );
-               } else {
-                       $thumb = false;
+               if ( $file && isset( $fp['frameless'] ) ) {
+                       $srcWidth = $file->getWidth( $page );
+                       # For "frameless" option: do not present an image bigger than the source (for bitmap-style images)
+                       # This is the same behaviour as the "thumb" option does it already.
+                       if ( $srcWidth && !$file->mustRender() && $hp['width'] > $srcWidth ) {
+                               $hp['width'] = $srcWidth;
+                       }
                }
 
-               if ( $page ) {
-                       $query = 'page=' . urlencode( $page );
+               if ( $file && $hp['width'] ) {
+                       # Create a resized image, without the additional thumbnail features
+                       $thumb = $file->transform( $hp );
                } else {
-                       $query = '';
-               }
-               $u = $nt->getLocalURL( $query );
-               $imgAttribs = array(
-                       'alt' => $alt,
-                       'longdesc' => $u
-               );
-               if ( $valign ) {
-                       $imgAttribs['style'] = "vertical-align: $valign";
+                       $thumb = false;
                }
-               $linkAttribs = array(
-                       'href' => $u,
-                       'class' => 'image',
-                       'title' => $alt
-               );
 
                if ( !$thumb ) {
-                       $s = $this->makeBrokenImageLinkObj( $img->getTitle() );
+                       $s = $this->makeBrokenImageLinkObj( $title, '', '', '', '', $time==true );
                } else {
-                       $s = $thumb->toHtml( $imgAttribs, $linkAttribs );
+                       $s = $thumb->toHtml( array(
+                               'desc-link' => true,
+                               'alt' => $fp['alt'],
+                               'valign' => isset( $fp['valign'] ) ? $fp['valign'] : false ,
+                               'img-class' => isset( $fp['border'] ) ? 'thumbborder' : false ) );
                }
-               if ( '' != $align ) {
-                       $s = "<div class=\"float{$align}\"><span>{$s}</span></div>";
+               if ( '' != $fp['align'] ) {
+                       $s = "<div class=\"float{$fp['align']}\"><span>{$s}</span></div>";
                }
                return str_replace("\n", ' ',$prefix.$s.$postfix);
        }
 
        /**
         * Make HTML for a thumbnail including image, border and caption
-        * $img is an Image object
+        * @param Title $title 
+        * @param File $file File object or false if it doesn't exist
         */
-       function makeThumbLinkObj( $img, $label = '', $alt, $align = 'right', $params = array(), $framed=false , $manual_thumb = "", $upright = false ) {
+       function makeThumbLinkObj( Title $title, $file, $label = '', $alt, $align = 'right', $params = array(), $framed=false , $manualthumb = "" ) {
+               $frameParams = array( 
+                       'alt' => $alt,
+                       'caption' => $label,
+                       'align' => $align
+               );
+               if ( $framed ) $frameParams['framed'] = true;
+               if ( $manualthumb ) $frameParams['manualthumb'] = $manualthumb;
+               return $this->makeThumbLink2( $title, $file, $frameParams, $params );
+       }
+
+       function makeThumbLink2( Title $title, $file, $frameParams = array(), $handlerParams = array(), $time = false ) {
                global $wgStylePath, $wgContLang;
+               $exists = $file && $file->exists();
+
+               # Shortcuts
+               $fp =& $frameParams;
+               $hp =& $handlerParams;
 
-               $page = isset( $params['page'] ) ? $params['page'] : false;
+               $page = isset( $hp['page'] ) ? $hp['page'] : false;
+               if ( !isset( $fp['align'] ) ) $fp['align'] = 'right';
+               if ( !isset( $fp['alt'] ) ) $fp['alt'] = '';
+               if ( !isset( $fp['caption'] ) ) $fp['caption'] = '';
 
-               if ( empty( $params['width'] ) ) {
+               if ( empty( $hp['width'] ) ) {
                        // Reduce width for upright images when parameter 'upright' is used 
-                       $params['width'] = $upright ? 130 : 180;
+                       $hp['width'] = isset( $fp['upright'] ) ? 130 : 180;
                }
                $thumb = false;
-               if ( $manual_thumb != '' ) {
-                       # Use manually specified thumbnail
-                       $manual_title = Title::makeTitleSafe( NS_IMAGE, $manual_thumb );
-                       if( $manual_title ) {
-                               $manual_img = new Image( $manual_title );
-                               $thumb = $manual_img->getUnscaledThumb();
-                       }
-               } elseif ( $framed ) {
-                       // Use image dimensions, don't scale
-                       $thumb = $img->getUnscaledThumb( $page );
+
+               if ( !$exists ) {
+                       $outerWidth = $hp['width'] + 2;
                } else {
-                       # Do not present an image bigger than the source, for bitmap-style images
-                       # This is a hack to maintain compatibility with arbitrary pre-1.10 behaviour
-                       $srcWidth = $img->getWidth( $page );
-                       if ( $srcWidth && !$img->mustRender() && $params['width'] > $srcWidth ) {
-                               $params['width'] = $srcWidth;
+                       if ( isset( $fp['manualthumb'] ) ) {
+                               # Use manually specified thumbnail
+                               $manual_title = Title::makeTitleSafe( NS_IMAGE, $fp['manualthumb'] );
+                               if( $manual_title ) {
+                                       $manual_img = wfFindFile( $manual_title );
+                                       if ( $manual_img ) {
+                                               $thumb = $manual_img->getUnscaledThumb();
+                                       } else {
+                                               $exists = false;
+                                       }
+                               }
+                       } elseif ( isset( $fp['framed'] ) ) {
+                               // Use image dimensions, don't scale
+                               $thumb = $file->getUnscaledThumb( $page );
+                       } else {
+                               # Do not present an image bigger than the source, for bitmap-style images
+                               # This is a hack to maintain compatibility with arbitrary pre-1.10 behaviour
+                               $srcWidth = $file->getWidth( $page );
+                               if ( $srcWidth && !$file->mustRender() && $hp['width'] > $srcWidth ) {
+                                       $hp['width'] = $srcWidth;
+                               }
+                               $thumb = $file->transform( $hp );
                        }
-                       $thumb = $img->transform( $params );
-               }
 
-               if ( $thumb ) {
-                       $outerWidth = $thumb->getWidth() + 2;
-               } else {
-                       $outerWidth = $params['width'] + 2;
+                       if ( $thumb ) {
+                               $outerWidth = $thumb->getWidth() + 2;
+                       } else {
+                               $outerWidth = $hp['width'] + 2;
+                       }
                }
 
                $query = $page ? 'page=' . urlencode( $page ) : '';
-               $u = $img->getTitle()->getLocalURL( $query );
+               $url = $title->getLocalURL( $query );
 
                $more = htmlspecialchars( wfMsg( 'thumbnail-more' ) );
-               $magnifyalign = $wgContLang->isRTL() ? 'left' : 'right';
-               $textalign = $wgContLang->isRTL() ? ' style="text-align:right"' : '';
 
-               $s = "<div class=\"thumb t{$align}\"><div class=\"thumbinner\" style=\"width:{$outerWidth}px;\">";
-               if ( !$thumb ) {
-                       $s .= htmlspecialchars( wfMsg( 'thumbnail_error', '' ) );
+               $s = "<div class=\"thumb t{$fp['align']}\"><div class=\"thumbinner\" style=\"width:{$outerWidth}px;\">";
+               if( !$exists ) {
+                       $s .= $this->makeBrokenImageLinkObj( $title, '', '', '', '', $time==true );
                        $zoomicon = '';
-               } elseif( !$img->exists() ) {
-                       $s .= $this->makeBrokenImageLinkObj( $img->getTitle() );
+               } elseif ( !$thumb ) {
+                       $s .= htmlspecialchars( wfMsg( 'thumbnail_error', '' ) );
                        $zoomicon = '';
                } else {
-                       $imgAttribs = array(
-                               'alt' => $alt,
-                               'longdesc' => $u,
-                               'class' => 'thumbimage'
-                       );
-                       $linkAttribs = array(
-                               'href' => $u,
-                               'class' => 'internal',
-                               'title' => $alt
-                       );
-                               
-                       $s .= $thumb->toHtml( $imgAttribs, $linkAttribs );
-                       if ( $framed ) {
+                       $s .= $thumb->toHtml( array(
+                               'alt' => $fp['alt'],
+                               'img-class' => 'thumbimage',
+                               'desc-link' => true ) );
+                       if ( isset( $fp['framed'] ) ) {
                                $zoomicon="";
                        } else {
-                               $zoomicon =  '<div class="magnify" style="float:'.$magnifyalign.'">'.
-                                       '<a href="'.$u.'" class="internal" title="'.$more.'">'.
+                               $zoomicon =  '<div class="magnify">'.
+                                       '<a href="'.$url.'" class="internal" title="'.$more.'">'.
                                        '<img src="'.$wgStylePath.'/common/images/magnify-clip.png" ' .
                                        'width="15" height="11" alt="" /></a></div>';
                        }
                }
-               $s .= '  <div class="thumbcaption"'.$textalign.'>'.$zoomicon.$label."</div></div></div>";
+               $s .= '  <div class="thumbcaption">'.$zoomicon.$fp['caption']."</div></div></div>";
                return str_replace("\n", ' ', $s);
        }
 
        /**
-        * Pass a title object, not a title string
+        * Make a "broken" link to an image
+        *
+        * @param Title $title Image title
+        * @param string $text Link label
+        * @param string $query Query string
+        * @param string $trail Link trail
+        * @param string $prefix Link prefix
+        * @param bool $time, a file of a certain timestamp was requested
+        * @return string
         */
-       function makeBrokenImageLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
-               # Fail gracefully
-               if ( ! isset($nt) ) {
-                       # throw new MWException();
+       public function makeBrokenImageLinkObj( $title, $text = '', $query = '', $trail = '', $prefix = '', $time = false ) {
+               global $wgEnableUploads;
+               if( $title instanceof Title ) {
+                       wfProfileIn( __METHOD__ );
+                       $currentExists = $time ? ( wfFindFile( $title ) != false ) : false;
+                       if( $wgEnableUploads && !$currentExists ) {
+                               $upload = SpecialPage::getTitleFor( 'Upload' );
+                               if( $text == '' )
+                                       $text = htmlspecialchars( $title->getPrefixedText() );
+                               $redir = RepoGroup::singleton()->getLocalRepo()->checkRedirect( $title );
+                               if( $redir ) {  
+                                       return $this->makeKnownLinkObj( $title, $text, $query, $trail, $prefix );
+                               } 
+                               $q = 'wpDestFile=' . $title->getPartialUrl();
+                               if( $query != '' )
+                                       $q .= '&' . $query;
+                               list( $inside, $trail ) = self::splitTrail( $trail );
+                               $style = $this->getInternalLinkAttributesObj( $title, $text, 'new' );
+                               wfProfileOut( __METHOD__ );
+                               return '<a href="' . $upload->escapeLocalUrl( $q ) . '"'
+                                       . $style . '>' . $prefix . $text . $inside . '</a>' . $trail;
+                       } else {
+                               wfProfileOut( __METHOD__ );
+                               return $this->makeKnownLinkObj( $title, $text, $query, $trail, $prefix );
+                       }
+               } else {
                        return "<!-- ERROR -->{$prefix}{$text}{$trail}";
                }
-
-               $fname = 'Linker::makeBrokenImageLinkObj';
-               wfProfileIn( $fname );
-
-               $q = 'wpDestFile=' . urlencode( $nt->getDBkey() );
-               if ( '' != $query ) {
-                       $q .= "&$query";
-               }
-               $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
-               $url = $uploadTitle->escapeLocalURL( $q );
-
-               if ( '' == $text ) {
-                       $text = htmlspecialchars( $nt->getPrefixedText() );
-               }
-               $style = $this->getInternalLinkAttributesObj( $nt, $text, "yes" );
-               list( $inside, $trail ) = Linker::splitTrail( $trail );
-               $s = "<a href=\"{$url}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
-
-               wfProfileOut( $fname );
-               return $s;
        }
 
-       /** @todo document */
-       function makeMediaLink( $name, /* wtf?! */ $url, $alt = '' ) {
+       /** @deprecated use Linker::makeMediaLinkObj() */
+       function makeMediaLink( $name, $unused = '', $text = '' ) {
                $nt = Title::makeTitleSafe( NS_IMAGE, $name );
-               return $this->makeMediaLinkObj( $nt, $alt );
+               return $this->makeMediaLinkObj( $nt, $text );
        }
 
        /**
@@ -637,13 +770,13 @@ class Linker {
                        ### HOTFIX. Instead of breaking, return empty string.
                        return $text;
                } else {
-                       $img  = new Image( $title );
-                       if( $img->exists() ) {
+                       $img  = wfFindFile( $title );
+                       if( $img ) {
                                $url  = $img->getURL();
                                $class = 'internal';
                        } else {
                                $upload = SpecialPage::getTitleFor( 'Upload' );
-                               $url = $upload->getLocalUrl( 'wpDestFile=' . urlencode( $img->getName() ) );
+                               $url = $upload->getLocalUrl( 'wpDestFile=' . urlencode( $title->getDBkey() ) );
                                $class = 'new';
                        }
                        $alt = htmlspecialchars( $title->getText() );
@@ -699,15 +832,18 @@ class Linker {
        }
 
        /**
-        * @param $userId Integer: user id in database.
-        * @param $userText String: user name in database.
-        * @param $redContribsWhenNoEdits Bool: return a red contribs link when the user had no edits and this is true.
-        * @return string HTML fragment with talk and/or block links
+        * Generate standard user tool links (talk, contributions, block link, etc.)
+        *
+        * @param int $userId User identifier
+        * @param string $userText User name or IP address
+        * @param bool $redContribsWhenNoEdits Should the contributions link be red if the user has no edits?
+        * @param int $flags Customisation flags (e.g. self::TOOL_LINKS_NOBLOCK)
+        * @return string
         */
-       public function userToolLinks( $userId, $userText, $redContribsWhenNoEdits = false ) {
+       public function userToolLinks( $userId, $userText, $redContribsWhenNoEdits = false, $flags = 0 ) {
                global $wgUser, $wgDisableAnonTalk, $wgSysopUserBans;
                $talkable = !( $wgDisableAnonTalk && 0 == $userId );
-               $blockable = ( $wgSysopUserBans || 0 == $userId );
+               $blockable = ( $wgSysopUserBans || 0 == $userId ) && !$flags & self::TOOL_LINKS_NOBLOCK;
 
                $items = array();
                if( $talkable ) {
@@ -716,7 +852,7 @@ class Linker {
                if( $userId ) {
                        // check if the user has an edit
                        if( $redContribsWhenNoEdits && User::edits( $userId ) == 0 ) {
-                               $style = "class='new'";
+                               $style = " class='new'";
                        } else {
                                $style = '';
                        }
@@ -842,8 +978,9 @@ class Linker {
         * add a separator where needed and format the comment itself with CSS
         * Called by Linker::formatComment.
         *
-        * @param $comment Comment text
-        * @param $title An optional title object used to links to sections
+        * @param string $comment Comment text
+        * @param object $title An optional title object used to links to sections
+        * @return string $comment formatted comment
         *
         * @todo Document the $local parameter.
         */
@@ -871,57 +1008,69 @@ class Linker {
                                        $sectionTitle = wfClone( $title );
                                        $sectionTitle->mFragment = $section;
                                }
-                               $link = $this->makeKnownLinkObj( $sectionTitle, wfMsg( 'sectionlink' ) );
+                               $link = $this->makeKnownLinkObj( $sectionTitle, wfMsgForContent( 'sectionlink' ) );
+                       }
+                       $auto = $link . $auto;
+                       if( $pre ) {
+                               $auto = '- ' . $auto; # written summary $presep autocomment (summary /* section */)
+                       }
+                       if( $post ) {
+                               $auto .= ': '; # autocomment $postsep written summary (/* section */ summary)
                        }
-                       $sep='-';
-                       $auto=$link.$auto;
-                       if($pre) { $auto = $sep.' '.$auto; }
-                       if($post) { $auto .= ' '.$sep; }
-                       $auto='<span class="autocomment">'.$auto.'</span>';
-                       $comment=$pre.$auto.$post;
+                       $auto = '<span class="autocomment">' . $auto . '</span>';
+                       $comment = $pre . $auto . $post;
                }
 
                return $comment;
        }
 
        /**
-        * Format regular and media links - all other wiki formatting is ignored
-        * Called by Linker::formatComment.
-        * @param $comment The comment text.
-        * @return Comment text with links using HTML.
+        * Formats wiki links and media links in text; all other wiki formatting
+        * is ignored
+        *
+        * @fixme doesn't handle sub-links as in image thumb texts like the main parser
+        * @param string $comment Text to format links in
+        * @return string
         */
-       private function formatLinksInComment( $comment ) {
+       public function formatLinksInComment( $comment ) {
+               return preg_replace_callback(
+                       '/\[\[:?(.*?)(\|(.*?))*\]\]([^[]*)/',
+                       array( $this, 'formatLinksInCommentCallback' ),
+                       $comment );
+       }
+       
+       protected function formatLinksInCommentCallback( $match ) {
                global $wgContLang;
 
                $medians = '(?:' . preg_quote( Namespace::getCanonicalName( NS_MEDIA ), '/' ) . '|';
                $medians .= preg_quote( $wgContLang->getNsText( NS_MEDIA ), '/' ) . '):';
+               
+               $comment = $match[0];
 
-               while(preg_match('/\[\[:?(.*?)(\|(.*?))*\]\](.*)$/',$comment,$match)) {
-                       # Handle link renaming [[foo|text]] will show link as "text"
-                       if( "" != $match[3] ) {
-                               $text = $match[3];
-                       } else {
-                               $text = $match[1];
-                       }
-                       $submatch = array();
-                       if( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
-                               # Media link; trail not supported.
-                               $linkRegexp = '/\[\[(.*?)\]\]/';
-                               $thelink = $this->makeMediaLink( $submatch[1], "", $text );
+               # Handle link renaming [[foo|text]] will show link as "text"
+               if( "" != $match[3] ) {
+                       $text = $match[3];
+               } else {
+                       $text = $match[1];
+               }
+               $submatch = array();
+               if( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
+                       # Media link; trail not supported.
+                       $linkRegexp = '/\[\[(.*?)\]\]/';
+                       $thelink = $this->makeMediaLink( $submatch[1], "", $text );
+               } else {
+                       # Other kind of link
+                       if( preg_match( $wgContLang->linkTrail(), $match[4], $submatch ) ) {
+                               $trail = $submatch[1];
                        } else {
-                               # Other kind of link
-                               if( preg_match( $wgContLang->linkTrail(), $match[4], $submatch ) ) {
-                                       $trail = $submatch[1];
-                               } else {
-                                       $trail = "";
-                               }
-                               $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
-                               if (isset($match[1][0]) && $match[1][0] == ':')
-                                       $match[1] = substr($match[1], 1);
-                               $thelink = $this->makeLink( $match[1], $text, "", $trail );
+                               $trail = "";
                        }
-                       $comment = preg_replace( $linkRegexp, StringUtils::escapeRegexReplacement( $thelink ), $comment, 1 );
+                       $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
+                       if (isset($match[1][0]) && $match[1][0] == ':')
+                               $match[1] = substr($match[1], 1);
+                       $thelink = $this->makeLink( $match[1], $text, "", $trail );
                }
+               $comment = preg_replace( $linkRegexp, StringUtils::escapeRegexReplacement( $thelink ), $comment, 1 );
 
                return $comment;
        }
@@ -997,7 +1146,7 @@ class Linker {
        /** @todo document */
        function tocList($toc) {
                global $wgJsMimeType;
-               $title =  wfMsgHtml('toc') ;
+               $title = wfMsgHtml('toc') ;
                return
                   '<table id="toc" class="toc" summary="' . $title .'"><tr><td>'
                 . '<div id="toctitle"><h2>' . $title . "</h2></div>\n"
@@ -1014,31 +1163,66 @@ class Linker {
                 . "</script>\n";
        }
 
-       /** @todo document */
+       /**
+        * Used to generate section edit links that point to "other" pages
+        * (sections that are really part of included pages).
+        *
+        * @param $title Title string.
+        * @param $section Integer: section number.
+        */
        public function editSectionLinkForOther( $title, $section ) {
-               global $wgContLang;
-
                $title = Title::newFromText( $title );
-               $editurl = '&section='.$section;
-               $url = $this->makeKnownLinkObj( $title, wfMsg('editsection'), 'action=edit'.$editurl );
-
-               return "<span class=\"editsection\">[".$url."]</span>";
-
+               return $this->doEditSectionLink( $title, $section, '', 'EditSectionLinkForOther' );
        }
 
        /**
-        * @param $title Title object.
+        * @param $nt Title object.
         * @param $section Integer: section number.
         * @param $hint Link String: title, or default if omitted or empty
         */
-       public function editSectionLink( $nt, $section, $hint='' ) {
-               global $wgContLang;
+       public function editSectionLink( Title $nt, $section, $hint='' ) {
+               if( $hint != '' ) {
+                       $hint = wfMsgHtml( 'editsectionhint', htmlspecialchars( $hint ) );
+                       $hint = " title=\"$hint\"";
+               }
+               return $this->doEditSectionLink( $nt, $section, $hint, 'EditSectionLink' );
+       }
 
+       /**
+        * Implement editSectionLink and editSectionLinkForOther.
+        *
+        * @param $nt      Title object
+        * @param $section Integer, section number
+        * @param $hint    String, for HTML title attribute
+        * @param $hook    String, name of hook to run
+        * @return         String, HTML to use for edit link
+        */
+       protected function doEditSectionLink( Title $nt, $section, $hint, $hook ) {
+               global $wgContLang;
                $editurl = '&section='.$section;
-               $hint = ( $hint=='' ) ? '' : ' title="' . wfMsgHtml( 'editsectionhint', htmlspecialchars( $hint ) ) . '"';
-               $url = $this->makeKnownLinkObj( $nt, wfMsg('editsection'), 'action=edit'.$editurl, '', '', '',  $hint );
+               $url = $this->makeKnownLinkObj(
+                       $nt,
+                       wfMsg('editsection'),
+                       'action=edit'.$editurl,
+                       '', '', '',  $hint
+               );
+               $result = null;
 
-               return "<span class=\"editsection\">[".$url."]</span>";
+               // The two hooks have slightly different interfaces . . .
+               if( $hook == 'EditSectionLink' ) {
+                       wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $hint, $url, &$result ) );
+               } elseif( $hook == 'EditSectionLinkForOther' ) {
+                       wfRunHooks( 'EditSectionLinkForOther', array( &$this, $nt, $section, $url, &$result ) );
+               }
+               
+               // For reverse compatibility, add the brackets *after* the hook is run,
+               // and even add them to hook-provided text.
+               if( is_null( $result ) ) {
+                       $result = wfMsg( 'editsection-brackets', $url );
+               } else {
+                       $result = wfMsg( 'editsection-brackets', $result );
+               }
+               return "<span class=\"editsection\">$result</span>";
        }
 
        /**
@@ -1094,15 +1278,28 @@ class Linker {
         * @param Revision $rev
         */
        function generateRollback( $rev ) {
-               global $wgUser, $wgRequest;
+               return '<span class="mw-rollback-link">['
+                       . $this->buildRollbackLink( $rev )
+                       . ']</span>';
+       }
+       
+       /**
+        * Build a raw rollback link, useful for collections of "tool" links
+        *
+        * @param Revision $rev
+        * @return string
+        */
+       public function buildRollbackLink( $rev ) {
+               global $wgRequest, $wgUser;
                $title = $rev->getTitle();
-
-               $extraRollback = $wgRequest->getBool( 'bot' ) ? '&bot=1' : '';
-               $extraRollback .= '&token=' . urlencode(
-                       $wgUser->editToken( array( $title->getPrefixedText(), $rev->getUserText() ) ) );
-               return '<span class="mw-rollback-link">['. $this->makeKnownLinkObj( $title,
-                       wfMsg('rollbacklink'),
-                       'action=rollback&from=' . urlencode( $rev->getUserText() ) . $extraRollback ) .']</span>';
+               $extra  = $wgRequest->getBool( 'bot' ) ? '&bot=1' : '';
+               $extra .= '&token=' . urlencode( $wgUser->editToken( array( $title->getPrefixedText(),
+                       $rev->getUserText() ) ) );
+               return $this->makeKnownLinkObj(
+                       $title,
+                       wfMsgHtml( 'rollbacklink' ),
+                       'action=rollback&from=' . urlencode( $rev->getUserText() ) . $extra
+               );              
        }
 
        /**
@@ -1166,28 +1363,7 @@ class Linker {
         */
        public function formatSize( $size ) {
                global $wgLang;
-               // For small sizes no decimal places necessary
-               $round = 0;
-               if( $size > 1024 ) {
-                       $size = $size / 1024;
-                       if( $size > 1024 ) {
-                               $size = $size / 1024;
-                               // For MB and bigger two decimal places are smarter
-                               $round = 2;
-                               if( $size > 1024 ) {
-                                       $size = $size / 1024;
-                                       $msg = 'size-gigabytes';
-                               } else {
-                                       $msg = 'size-megabytes';
-                               }
-                       } else {
-                               $msg = 'size-kilobytes';
-                       }
-               } else {
-                       $msg = 'size-bytes';
-               }
-               $size = round( $size, $round );
-               return wfMsgHtml( $msg, $wgLang->formatNum( $size ) );
+               return htmlspecialchars( $wgLang->formatSize( $size ) );
        }
 
        /**
@@ -1201,6 +1377,8 @@ class Linker {
         *   element (e.g., ' title="This does something [x]" accesskey="x"').
         */
        public function tooltipAndAccesskey($name) {
+               $fname="Linker::tooltipAndAccesskey";
+               wfProfileIn($fname);
                $out = '';
 
                $tooltip = wfMsg('tooltip-'.$name);
@@ -1216,6 +1394,7 @@ class Linker {
                } elseif ($out) {
                        $out .= '"';
                }
+               wfProfileOut($fname);
                return $out;
        }
 
@@ -1240,5 +1419,3 @@ class Linker {
                return $out;
        }
 }
-
-?>