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<?php
// PHP Weathermap 0.97a
// Copyright Howard Jones, 2005-2010 howie@thingy.com
// http://www.network-weathermap.com/
// Released under the GNU Public License

require_once "HTML_ImageMap.class.php";

class WeatherMapLink extends WeatherMapItem
{
        var $owner,                $name;
        var $id;
        var $maphtml;
        var $a,                    $b; // the ends - references to nodes
        var $width,                $arrowstyle, $linkstyle;
        var $bwfont,               $labelstyle, $labelboxstyle;
        var $zorder;
        var $overliburl = array();
        var $infourl = array();
        var $notes;
        var $overlibcaption = array();
        var $overlibwidth,         $overlibheight;
        var $bandwidth_in,         $bandwidth_out;
        var $max_bandwidth_in,     $max_bandwidth_out;
        var $max_bandwidth_in_cfg, $max_bandwidth_out_cfg;
        var $targets = array();
        var $a_offset,             $b_offset;
        var $in_ds,                $out_ds;
        var $colours = array();
        var $selected;
        var $inpercent,            $outpercent;
        var $inherit_fieldlist;
        var $vialist = array();
        var $viastyle;
        var $usescale, $duplex; 
        var $scaletype;
        var $outlinecolour;
        var $bwoutlinecolour;
        var $bwboxcolour;
        var $splitpos;
        var $commentfont;
        var $notestext = array();
        var $inscalekey,$outscalekey;
        var $inscaletag, $outscaletag;
        # var $incolour,$outcolour;
        var $commentfontcolour;
        var $commentstyle;
        var $bwfontcolour;
        # var $incomment, $outcomment;
        var $comments = array();
        var $bwlabelformats = array();
        var $curvepoints;
        var $labeloffset_in, $labeloffset_out;
        var $commentoffset_in, $commentoffset_out;
        var $template;

        function WeatherMapLink() { $this->inherit_fieldlist=array
                (
                        'my_default' => NULL,
                        'width' => 7,
                        'commentfont' => 1,
                        'bwfont' => 2,
                        'template' => ':: DEFAULT ::',
                        'splitpos'=>50,
                        'labeloffset_out' => 25,
                        'labeloffset_in' => 75,
                        'commentoffset_out' => 5,
                        'commentoffset_in' => 95,
                        'commentstyle' => 'edge',
                        'arrowstyle' => 'classic',
                        'viastyle' => 'curved',
                        'usescale' => 'DEFAULT',
                        'scaletype' => 'percent',
                        'targets' => array(),
                        'duplex' => 'full',
                        'infourl' => array('',''),
                        'notes' => array(),
                        'hints' => array(),
                        'comments' => array('',''),
                        'bwlabelformats' => array(FMT_PERC_IN,FMT_PERC_OUT),
                        'overliburl' => array(array(),array()),
                        'notestext' => array(IN=>'',OUT=>''),
                        'labelstyle' => 'percent',
                        'labelboxstyle' => 'classic',
                        'linkstyle' => 'twoway',
                        'overlibwidth' => 0,
                        'overlibheight' => 0,
                        'outlinecolour' => array(0, 0, 0),
                        'bwoutlinecolour' => array(0, 0, 0),
                        'bwfontcolour' => array(0, 0, 0),
                        'bwboxcolour' => array(255, 255, 255),
                        'commentfontcolour' => array(192,192,192),
                        'inpercent'=>0, 'outpercent'=>0,
                        'inscalekey'=>'', 'outscalekey'=>'',
                        # 'incolour'=>-1,'outcolour'=>-1,
                        'a_offset' => 'C',
                        'b_offset' => 'C',
                        #'incomment' => '',
                        #'outcomment' => '',
                        'zorder' => 300,
                        'overlibcaption' => array('',''),
                        'max_bandwidth_in' => 100000000,
                        'max_bandwidth_out' => 100000000,
                        'max_bandwidth_in_cfg' => '100M',
                        'max_bandwidth_out_cfg' => '100M'
                );
        // $this->a_offset = 'C';
        // $this->b_offset = 'C';
        //  $this->targets = array();
        }

        function Reset(&$newowner)
        {
                $this->owner=$newowner;
                
                $template = $this->template;
                if($template == '') $template = "DEFAULT";

                debug("Resetting $this->name with $template\n");

                // the internal default-default gets it's values from inherit_fieldlist
                // everything else comes from a link object - the template.
                if($this->name==':: DEFAULT ::')
                {
                        foreach (array_keys($this->inherit_fieldlist) as $fld) {
                                $this->$fld=$this->inherit_fieldlist[$fld];
                        }
                }
                else
                {
                        $this->CopyFrom($this->owner->links[$template]); 
                }
                $this->template = $template;
                
                // to stop the editor tanking, now that colours are decided earlier in ReadData
                $this->colours[IN] = new Colour(192,192,192);
                $this->colours[OUT] = new Colour(192,192,192);
                $this->id = $newowner->next_id++;
        }

        function my_type() {  return "LINK"; }

        function CopyFrom(&$source)
        {
                debug("Initialising LINK $this->name from $source->name\n");
                assert('is_object($source)');
                                
                foreach (array_keys($this->inherit_fieldlist) as $fld) {
                         if($fld != 'template') $this->$fld = $source->$fld;
                }
        }

// image = GD image references
// col = array of Colour objects
// widths = array of link widths
        function DrawComments($image,$col,$widths)
        {
                $curvepoints =& $this->curvepoints;
                $last = count($curvepoints)-1;
                                
                $totaldistance = $curvepoints[$last][2];
                                
                $start[OUT] = 0;
                $commentpos[OUT] = $this->commentoffset_out;
                $commentpos[IN] = $this->commentoffset_in;
                $start[IN] = $last;
                
                if($this->linkstyle=="oneway")
                {
                        $dirs = array(OUT);
                }
                else
                {
                        $dirs = array(OUT,IN);
                }
                
                foreach ($dirs as $dir)
                {
                        
                
                        // Time to deal with Link Comments, if any
                        $comment = $this->owner->ProcessString($this->comments[$dir], $this);
                        
                        # print "COMMENT: $comment";
                        
                        if($this->owner->get_hint('screenshot_mode')==1)  $comment=screenshotify($comment);
        
                        if($comment != '')
                        {
                                # print "\n\n----------------------------------------------------------------\nComment $dir for ".$this->name."\n";;
                        
                                list($textlength, $textheight) = $this->owner->myimagestringsize($this->commentfont, $comment);
                                
                                $extra_percent = $commentpos[$dir];
                                
                                // $font = $this->commentfont;
                                // nudge pushes the comment out along the link arrow a little bit
                                // (otherwise there are more problems with text disappearing underneath links)
                                # $nudgealong = 0; $nudgeout=0;
                                $nudgealong = intval($this->get_hint("comment_nudgealong"));
                                $nudgeout = intval($this->get_hint("comment_nudgeout"));                
        
                                $extra = ($totaldistance * ($extra_percent/100));
                                # $comment_index = find_distance($curvepoints,$extra);
                                
                                list($x,$y,$comment_index,$angle) = find_distance_coords_angle($curvepoints,$extra);
                                                        
                                #  print "$extra_percent => $extra ($totaldistance)\n";
                                #printf("  Point A is %f,%f\n",$curvepoints[$comment_index][0], $curvepoints[$comment_index][1]);
                                #printf("  Point B is %f,%f\n",$curvepoints[$comment_index+1][0], $curvepoints[$comment_index+1][1]);
                                #printf("  Point X is %f,%f\n",$x, $y);
                                                        
                                # if( ($comment_index != 0)) print "I ";
                                # if (($x != $curvepoints[$comment_index][0]) ) print "X ";
                                # if (($y != $curvepoints[$comment_index][1]) ) print "Y ";
                                # print "\n";
                                                        
                                if( ($comment_index != 0) && (($x != $curvepoints[$comment_index][0]) || ($y != $curvepoints[$comment_index][1])) )
                                {
                                #       print "  -> Path 1\n";
                                        $dx = $x - $curvepoints[$comment_index][0];
                                        $dy = $y - $curvepoints[$comment_index][1];
                                }
                                else
                                {                       
                                #       print "  -> Path 2\n";
                                        $dx = $curvepoints[$comment_index+1][0] - $x;
                                        $dy = $curvepoints[$comment_index+1][1] - $y;
                                }
                                                                
                                $centre_distance = $widths[$dir] + 4 + $nudgeout;
                                if($this->commentstyle == 'center')
                                {
                                        $centre_distance = $nudgeout - ($textheight/2);
                                }
                                                                
                                // find the normal to our link, so we can get outside the arrow
                                
                                $l=sqrt(($dx * $dx) + ($dy * $dy));
                                
                                # print "$extra => $comment_index/$last => $x,$y => $dx,$dy => $l\n";
                                
                                $dx = $dx/$l;   $dy = $dy/$l;
                                $nx = $dy;  $ny = -$dx;
                                $flipped=FALSE;
                                
                                // if the text will be upside-down, rotate it, flip it, and right-justify it
                                // not quite as catchy as Missy's version
                                if(abs($angle)>90)
                                {
                                        # $col = $map->selected;
                                        $angle -= 180;
                                        if($angle < -180) $angle +=360;
                                        $edge_x = $x + $nudgealong*$dx - $nx * $centre_distance;
                                        $edge_y = $y + $nudgealong*$dy - $ny * $centre_distance;
                                        # $comment .= "@";
                                        $flipped = TRUE;
                                }
                                else
                                {
                                        $edge_x = $x + $nudgealong*$dx + $nx * $centre_distance;
                                        $edge_y = $y + $nudgealong*$dy + $ny * $centre_distance;
                                }
                                
                                
                                
                                if( !$flipped && ($extra + $textlength) > $totaldistance)
                                {                                       
                                        $edge_x -= $dx * $textlength;
                                        $edge_y -= $dy * $textlength;
                                        # $comment .= "#";
                                }
                                
                                if( $flipped && ($extra - $textlength) < 0)
                                {                                       
                                        $edge_x += $dx * $textlength;
                                        $edge_y += $dy * $textlength;
                                        # $comment .= "%";
                                }
                                
                                // FINALLY, draw the text!
                                # imagefttext($image, $fontsize, $angle, $edge_x, $edge_y, $col, $font,$comment);
                                $this->owner->myimagestring($image, $this->commentfont, $edge_x, $edge_y, $comment, $col[$dir], $angle);
                                #imagearc($image,$x,$y,10,10,0, 360,$this->owner->selected);
                                #imagearc($image,$edge_x,$edge_y,10,10,0, 360,$this->owner->selected);
                        }
                }
        }

        function Draw($im, &$map)
        {
                // Get the positions of the end-points
                $x1=$map->nodes[$this->a->name]->x;
                $y1=$map->nodes[$this->a->name]->y;

                $x2=$map->nodes[$this->b->name]->x;
                $y2=$map->nodes[$this->b->name]->y;
                
                if(is_null($x1)) { warn("LINK ".$this->name." uses a NODE with no POSITION! [WMWARN35]\n"); return; }
                if(is_null($y1)) { warn("LINK ".$this->name." uses a NODE with no POSITION! [WMWARN35]\n"); return; }
                if(is_null($x2)) { warn("LINK ".$this->name." uses a NODE with no POSITION! [WMWARN35]\n"); return; }
                if(is_null($y2)) { warn("LINK ".$this->name." uses a NODE with no POSITION! [WMWARN35]\n"); return; }
                
                
                if( ($this->linkstyle=='twoway') && ($this->labeloffset_in < $this->labeloffset_out) && (intval($map->get_hint("nowarn_bwlabelpos"))==0) )
                {
                        warn("LINK ".$this->name." probably has it's BWLABELPOSs the wrong way around [WMWARN50]\n");
                }
                
                list($dx, $dy)=calc_offset($this->a_offset, $map->nodes[$this->a->name]->width, $map->nodes[$this->a->name]->height);
                $x1+=$dx;
                $y1+=$dy;

                list($dx, $dy)=calc_offset($this->b_offset, $map->nodes[$this->b->name]->width, $map->nodes[$this->b->name]->height);
                $x2+=$dx;
                $y2+=$dy;

                if( ($x1==$x2) && ($y1==$y2) && sizeof($this->vialist)==0)
                {
                        warn("Zero-length link ".$this->name." skipped. [WMWARN45]");
                        return;
                }

                $outlinecol = new Colour($this->outlinecolour);
                $commentcol = new Colour($this->commentfontcolour);
                
                $outline_colour = $outlinecol->gdallocate($im);
                                
                $xpoints = array ( );
                $ypoints = array ( );

                $xpoints[]=$x1;
                $ypoints[]=$y1;

                # warn("There are VIAs.\n");
                foreach ($this->vialist as $via)
                {
                        # imagearc($im, $via[0],$via[1],20,20,0,360,$map->selected);
                        if(isset($via[2]))
                        {
                                $xpoints[]=$map->nodes[$via[2]]->x + $via[0];
                                $ypoints[]=$map->nodes[$via[2]]->y + $via[1];
                        }
                        else
                        {
                                $xpoints[]=$via[0];
                                $ypoints[]=$via[1];
                        }
                }

                $xpoints[]=$x2;
                $ypoints[]=$y2;

                # list($link_in_colour,$link_in_scalekey, $link_in_scaletag) = $map->NewColourFromPercent($this->inpercent,$this->usescale,$this->name);
                # list($link_out_colour,$link_out_scalekey, $link_out_scaletag) = $map->NewColourFromPercent($this->outpercent,$this->usescale,$this->name);
                
                $link_in_colour = $this->colours[IN];
                $link_out_colour = $this->colours[OUT];
                
                $gd_in_colour = $link_in_colour->gdallocate($im);
                $gd_out_colour = $link_out_colour->gdallocate($im);
                
        //      $map->links[$this->name]->inscalekey = $link_in_scalekey;
        //      $map->links[$this->name]->outscalekey = $link_out_scalekey;
                
                $link_width=$this->width;
                // these will replace the one above, ultimately.
                $link_in_width=$this->width;
                $link_out_width=$this->width;
                        
                // for bulging animations
                if ( ($map->widthmod) || ($map->get_hint('link_bulge') == 1))
                {
                        // a few 0.1s and +1s to fix div-by-zero, and invisible links
                        $link_width = (($link_width * $this->inpercent * 1.5 + 0.1) / 100) + 1;
                        // these too
                        $link_in_width = (($link_in_width * $this->inpercent * 1.5 + 0.1) / 100) + 1;
                        $link_out_width = (($link_out_width * $this->outpercent * 1.5 + 0.1) / 100) + 1;
                }


                if($this->viastyle=='curved')
                {
                        // Calculate the spine points - the actual curve        
                        $this->curvepoints = calc_curve($xpoints, $ypoints);
                                                                                
                        // then draw the curve itself
                        draw_curve($im, $this->curvepoints,
                                array($link_in_width,$link_out_width), $outline_colour, array($gd_in_colour, $gd_out_colour),
                                $this->name, $map, $this->splitpos, ($this->linkstyle=='oneway'?TRUE:FALSE) );
                }
                
                if($this->viastyle=='angled')
                {
                        // Calculate the spine points - the actual not a curve really, but we
                        // need to create the array, and calculate the distance bits, otherwise
                        // things like bwlabels won't know where to go.
                        
                        $this->curvepoints = calc_straight($xpoints, $ypoints);
                                                        
                        // then draw the "curve" itself
                        draw_straight($im, $this->curvepoints,
                                array($link_in_width,$link_out_width), $outline_colour, array($gd_in_colour, $gd_out_colour),
                                $this->name, $map, $this->splitpos, ($this->linkstyle=='oneway'?TRUE:FALSE) );
                }

                if ( !$commentcol->is_none() )
                {                       
                        if($commentcol->is_contrast())
                        {
                                $commentcol_in = $link_in_colour->contrast();
                                $commentcol_out = $link_out_colour->contrast();
                        }
                        else
                        {
                                $commentcol_in = $commentcol;
                                $commentcol_out = $commentcol;
                        }
                
                        $comment_colour_in = $commentcol_in->gdallocate($im);
                        $comment_colour_out = $commentcol_out->gdallocate($im);
                        
                        $this->DrawComments($im,array($comment_colour_in, $comment_colour_out),array($link_in_width*1.1,$link_out_width*1.1));
                }

                $curvelength = $this->curvepoints[count($this->curvepoints)-1][2];
                // figure out where the labels should be, and what the angle of the curve is at that point
                list($q1_x,$q1_y,$junk,$q1_angle) = find_distance_coords_angle($this->curvepoints,($this->labeloffset_out/100)*$curvelength);
                list($q3_x,$q3_y,$junk,$q3_angle) = find_distance_coords_angle($this->curvepoints,($this->labeloffset_in/100)*$curvelength);

                # imageline($im, $q1_x+20*cos(deg2rad($q1_angle)),$q1_y-20*sin(deg2rad($q1_angle)), $q1_x-20*cos(deg2rad($q1_angle)), $q1_y+20*sin(deg2rad($q1_angle)), $this->owner->selected );
                # imageline($im, $q3_x+20*cos(deg2rad($q3_angle)),$q3_y-20*sin(deg2rad($q3_angle)), $q3_x-20*cos(deg2rad($q3_angle)), $q3_y+20*sin(deg2rad($q3_angle)), $this->owner->selected );

                # warn("$q1_angle $q3_angle\n");

                if (!is_null($q1_x))
                {
                        $outbound=array
                                (
                                        $q1_x,
                                        $q1_y,
                                        0,
                                        0,
                                        $this->outpercent,
                                        $this->bandwidth_out,
                                        $q1_angle,
                                        OUT
                                );

                        $inbound=array
                                (
                                        $q3_x,
                                        $q3_y,
                                        0,
                                        0,
                                        $this->inpercent,
                                        $this->bandwidth_in,
                                        $q3_angle,
                                        IN
                                );

                        if ($map->sizedebug)
                        {
                                $outbound[5]=$this->max_bandwidth_out;
                                $inbound[5]=$this->max_bandwidth_in;
                        }
                        
                        
                        if($this->linkstyle=='oneway')
                        {
                                $tasks = array($outbound);
                        }
                        else
                        {
                                $tasks = array($inbound,$outbound);
                        }

                        foreach ($tasks as $task)
                        {
                                $thelabel="";
                                
                                $thelabel = $map->ProcessString($this->bwlabelformats[$task[7]],$this);
        
                                if ($thelabel != '')
                                {
                                        debug("Bandwidth for label is ".$task[5]."\n");
                                        
                                        $padding = intval($this->get_hint('bwlabel_padding'));          
                                        
                                        // if screenshot_mode is enabled, wipe any letters to X and wipe any IP address to 127.0.0.1
                                        // hopefully that will preserve enough information to show cool stuff without leaking info
                                        if($map->get_hint('screenshot_mode')==1)  $thelabel = screenshotify($thelabel);

                                        if($this->labelboxstyle == 'angled')
                                        {
                                                $angle = $task[6];
                                        }
                                        else
                                        {
                                                $angle = 0;
                                        }
                                        
                                        $map->DrawLabelRotated($im, $task[0],            $task[1],$angle,           $thelabel, $this->bwfont, $padding,
                                                        $this->name,  $this->bwfontcolour, $this->bwboxcolour, $this->bwoutlinecolour,$map, $task[7]);
                                        
                                        // imagearc($im, $task[0], $task[1], 10,10,0,360,$map->selected);
                                }
                        }
                }
        }

        function WriteConfig()
        {
                $output='';
                # $output .= "# ID ".$this->id." - first seen in ".$this->defined_in."\n";

                if($this->config_override != '')
                {
                        $output = $this->config_override."\n";
                }
                else
                {
                        # $defdef = $this->owner->defaultlink;
                        $dd = $this->owner->links[$this->template];
                        
                        debug("Writing config for LINK $this->name against $this->template\n");
                                                
                        $basic_params = array(
                                        array('width','WIDTH',CONFIG_TYPE_LITERAL),
                                        array('zorder','ZORDER',CONFIG_TYPE_LITERAL),
                                        array('overlibwidth','OVERLIBWIDTH',CONFIG_TYPE_LITERAL),
                                        array('overlibheight','OVERLIBHEIGHT',CONFIG_TYPE_LITERAL),
                                        array('arrowstyle','ARROWSTYLE',CONFIG_TYPE_LITERAL),
                                        array('viastyle','VIASTYLE',CONFIG_TYPE_LITERAL),
                                        array('linkstyle','LINKSTYLE',CONFIG_TYPE_LITERAL),
                                        array('splitpos','SPLITPOS',CONFIG_TYPE_LITERAL),
                                        array('duplex','DUPLEX',CONFIG_TYPE_LITERAL),
                                        array('commentstyle','COMMENTSTYLE',CONFIG_TYPE_LITERAL),
                                        array('labelboxstyle','BWSTYLE',CONFIG_TYPE_LITERAL),
                                        array('usescale','USESCALE',CONFIG_TYPE_LITERAL),
                                        
                                        array('bwfont','BWFONT',CONFIG_TYPE_LITERAL),
                                        array('commentfont','COMMENTFONT',CONFIG_TYPE_LITERAL),
                                        
                                        array('bwoutlinecolour','BWOUTLINECOLOR',CONFIG_TYPE_COLOR),
                                        array('bwboxcolour','BWBOXCOLOR',CONFIG_TYPE_COLOR),
                                        array('outlinecolour','OUTLINECOLOR',CONFIG_TYPE_COLOR),
                                        array('commentfontcolour','COMMENTFONTCOLOR',CONFIG_TYPE_COLOR),
                                        array('bwfontcolour','BWFONTCOLOR',CONFIG_TYPE_COLOR)
                                );
                        
                        # TEMPLATE must come first. DEFAULT
                        if($this->template != 'DEFAULT' && $this->template != ':: DEFAULT ::')
                        {
                                $output.="\tTEMPLATE " . $this->template . "\n";
                        }
                        
                        foreach ($basic_params as $param)
                        {
                                $field = $param[0];
                                $keyword = $param[1];
                                                
                                # $output .= "# For $keyword: ".$this->$field." vs ".$dd->$field."\n";
                                if ($this->$field != $dd->$field) 
                                #if (1==1)
                                { 
                                        if($param[2] == CONFIG_TYPE_COLOR) $output.="\t$keyword " . render_colour($this->$field) . "\n"; 
                                        if($param[2] == CONFIG_TYPE_LITERAL) $output.="\t$keyword " . $this->$field . "\n"; 
                                }
                        }               
                
                        if ($this->infourl[IN] == $this->infourl[OUT]) {
                                $dirs = array(IN=>""); // only use the IN value, since they're both the same, but don't prefix the output keyword
                        } else {
                                $dirs = array( IN=>"IN", OUT=>"OUT" );// the full monty two-keyword version
                        }
                                                
                        foreach ($dirs as $dir=>$tdir) {
                                if ($this->infourl[$dir] != $dd->infourl[$dir]) { 
                                        $output .= "\t" . $tdir . "INFOURL " . $this->infourl[$dir] . "\n"; 
                                }
                        }
                        
                        if ($this->overlibcaption[IN] == $this->overlibcaption[OUT]) {
                                $dirs = array(IN=>""); // only use the IN value, since they're both the same, but don't prefix the output keyword
                        } else {
                                $dirs = array( IN=>"IN", OUT=>"OUT" );// the full monty two-keyword version
                        }
                                                
                        foreach ($dirs as $dir=>$tdir) {
                                if ($this->overlibcaption[$dir] != $dd->overlibcaption[$dir]) { 
                                        $output .= "\t".$tdir."OVERLIBCAPTION " . $this->overlibcaption[$dir] . "\n"; 
                                }
                        }
                
                        if ($this->notestext[IN] == $this->notestext[OUT]) {
                                $dirs = array(IN=>""); // only use the IN value, since they're both the same, but don't prefix the output keyword
                        } else { 
                                $dirs = array( IN=>"IN", OUT=>"OUT" );// the full monty two-keyword version
                        }
        
                        foreach ($dirs as $dir=>$tdir) {
                                if ($this->notestext[$dir] != $dd->notestext[$dir]) {
                                        $output .= "\t" . $tdir . "NOTES " . $this->notestext[$dir] . "\n"; 
                                }
                        }
                                
                        if ($this->overliburl[IN]==$this->overliburl[OUT]) {
                                $dirs = array(IN=>""); // only use the IN value, since they're both the same, but don't prefix the output keyword
                        } else {
                                $dirs = array( IN=>"IN", OUT=>"OUT" );// the full monty two-keyword version
                        }
                        
                        foreach ($dirs as $dir=>$tdir) {
                                if ($this->overliburl[$dir] != $dd->overliburl[$dir]) { 
                                        $output.="\t".$tdir."OVERLIBGRAPH " . join(" ",$this->overliburl[$dir]) . "\n"; 
                                }
                        }       
                        
                        // if formats have been set, but they're just the longform of the built-in styles, set them back to the built-in styles
                        if($this->labelstyle=='--' && $this->bwlabelformats[IN] == FMT_PERC_IN && $this->bwlabelformats[OUT] == FMT_PERC_OUT)
                        {
                                $this->labelstyle = 'percent';
                        }
                        if($this->labelstyle=='--' && $this->bwlabelformats[IN] == FMT_BITS_IN && $this->bwlabelformats[OUT] == FMT_BITS_OUT)
                        {
                                $this->labelstyle = 'bits';
                        }
                        if($this->labelstyle=='--' && $this->bwlabelformats[IN] == FMT_UNFORM_IN && $this->bwlabelformats[OUT] == FMT_UNFORM_OUT)
                        {
                                $this->labelstyle = 'unformatted';
                        }

                        // if specific formats have been set, then the style will be '--'
                        // if it isn't then use the named style
                        if ( ($this->labelstyle != $dd->labelstyle) && ($this->labelstyle != '--') ) { 
                                $output .= "\tBWLABEL " . $this->labelstyle . "\n"; 
                        }
                                                
                        // if either IN or OUT field changes, then both must be written because a regular BWLABEL can't do it
                        // XXX this looks wrong
                        $comparison = $dd->bwlabelformats[IN];
                        $comparison2 = $dd->bwlabelformats[OUT];
                                                
                        if ( ( $this->labelstyle == '--') && ( ($this->bwlabelformats[IN] != $comparison) || ($this->bwlabelformats[OUT]!= '--')) )
                        {
                                $output .= "\tINBWFORMAT " . $this->bwlabelformats[IN]. "\n";
                                $output .= "\tOUTBWFORMAT " . $this->bwlabelformats[OUT]. "\n";
                        }
        
                        $comparison = $dd->labeloffset_in;
                        $comparison2 = $dd->labeloffset_out;
        
                        if ( ($this->labeloffset_in != $comparison) || ($this->labeloffset_out != $comparison2) )
                        { $output.="\tBWLABELPOS " . $this->labeloffset_in . " " . $this->labeloffset_out . "\n"; }
        
                        $comparison=$dd->commentoffset_in.":".$dd->commentoffset_out;
                        $mine = $this->commentoffset_in.":".$this->commentoffset_out;
                        if ($mine != $comparison) { $output.="\tCOMMENTPOS " . $this->commentoffset_in." ".$this->commentoffset_out. "\n"; }
        
        
                        $comparison=$dd->targets;
        
                        if ($this->targets != $comparison) {
                                $output.="\tTARGET";
        
                                foreach ($this->targets as $target) { 
                                        if(strpos($target[4]," ") == FALSE) {
                                                $output .= " " . $target[4]; 
                                        } else {
                                                $output .= ' "' . $target[4] . '"'; 
                                        }
                                }       
                                $output .= "\n";
                        }
                                
                        foreach (array(IN,OUT) as $dir) {
                                if ($dir==IN) { 
                                        $tdir="IN";
                                }
                                if ($dir==OUT) { 
                                        $tdir="OUT";
                                }
                                
                                $comparison=$dd->comments[$dir];
                                if ($this->comments[$dir] != $comparison) { 
                                        $output .= "\t" . $tdir . "COMMENT " . $this->comments[$dir] . "\n"; 
                                }
                        }
                                        
                        if (isset($this->a) && isset($this->b)) {
                                $output .= "\tNODES " . $this->a->name;
        
                                if ($this->a_offset != 'C') {
                                        $output .= ":" . $this->a_offset;
                                }
        
                                $output .= " " . $this->b->name;
        
                                if ($this->b_offset != 'C') {
                                        $output .= ":" . $this->b_offset;
                                }
        
                                $output .= "\n";
                        }
        
                        if (count($this->vialist) > 0) {
                                foreach ($this->vialist as $via) {
                                        if( isset($via[2])) {
                                                $output .= sprintf("\tVIA %s %d %d\n", $via[2],$via[0], $via[1]);
                                        } else {
                                                $output .= sprintf("\tVIA %d %d\n", $via[0], $via[1]);
                                        }
                                }
                        }
        
                        if (($this->max_bandwidth_in != $dd->max_bandwidth_in)
                                || ($this->max_bandwidth_out != $dd->max_bandwidth_out)
                                        || ($this->name == 'DEFAULT'))
                        {
                                if ($this->max_bandwidth_in == $this->max_bandwidth_out)
                                { $output.="\tBANDWIDTH " . $this->max_bandwidth_in_cfg . "\n"; }
                                else { $output
                                .="\tBANDWIDTH " . $this->max_bandwidth_in_cfg . " " . $this->max_bandwidth_out_cfg . "\n"; }
                        }
                
                        foreach ($this->hints as $hintname=>$hint)
                        {
                          // all hints for DEFAULT node are for writing
                          // only changed ones, or unique ones, otherwise
                              if( 
                            ($this->name == 'DEFAULT')
                          ||
                                    (isset($dd->hints[$hintname]) 
                                    &&
                                    $dd->hints[$hintname] != $hint)
                                  ||
                                    (!isset($dd->hints[$hintname]))
                                )
                              {               
                            $output .= "\tSET $hintname $hint\n";
                              }
                        }
        
                        if ($output != '') {
                                $output = "LINK " . $this->name . "\n".$output."\n";
                        }
                }
                return($output);
        }

        function asJS()
        {
                $js='';
                $js.="Links[" . js_escape($this->name) . "] = {";
                $js .= "\"id\":" . $this->id. ", ";

                if (isset($this->a))
                {
                        $js.="a:'" . $this->a->name . "', ";
                        $js.="b:'" . $this->b->name . "', ";
                }

                $js.="width:'" . $this->width . "', ";
                $js.="target:";

                $tgt='';

                foreach ($this->targets as $target) { 
                        if(strpos($target[4]," ") == FALSE) {
                                $tgt .= $target[4] . ' ';
                        } else {
                                $tgt .= '"'.$target[4] . '" ';
                        }
                }

                $js.=js_escape(trim($tgt));
                $js.=",";

                $js.="bw_in:" . js_escape($this->max_bandwidth_in_cfg) . ", ";
                $js.="bw_out:" . js_escape($this->max_bandwidth_out_cfg) . ", ";

                $js.="name:" . js_escape($this->name) . ", ";
                $js.="overlibwidth:'" . $this->overlibheight . "', ";
                $js.="overlibheight:'" . $this->overlibwidth . "', ";
                $js.="overlibcaption:" . js_escape($this->overlibcaption[IN]) . ", ";
                
                $js.="commentin:" . js_escape($this->comments[IN]) . ", ";
                $js.="commentposin:" . intval($this->commentoffset_in) . ", ";
                
                $js.="commentout:" . js_escape($this->comments[OUT]) . ", ";
                $js.="commentposout:" . intval($this->commentoffset_out) . ", ";

                $js.="infourl:" . js_escape($this->infourl[IN]) . ", ";
                $js.="overliburl:" . js_escape(join(" ",$this->overliburl[IN]));
                
                $js.="};\n";
                $js .= "LinkIDs[\"L" . $this->id . "\"] = ". js_escape($this->name) . ";\n";
                return $js;
        }

        function asJSON($complete=TRUE)
        {
                $js = '';
                $js .= "" . js_escape($this->name) . ": {";
                $js .= "\"id\":" . $this->id. ", ";
                if (isset($this->a)) 
                {
                        $js.="\"a\":\"" . $this->a->name . "\", ";
                        $js.="\"b\":\"" . $this->b->name . "\", ";
                }

                if($complete)
                {
                        $js.="\"infourl\":" . js_escape($this->infourl) . ", ";
                        $js.="\"overliburl\":" . js_escape($this->overliburl). ", ";
                        $js.="\"width\":\"" . $this->width . "\", ";
                        $js.="\"target\":";
        
                        $tgt="";
        
                        foreach ($this->targets as $target) { $tgt.=$target[4] . " "; }
        
                        $js.=js_escape(trim($tgt));
                        $js.=",";
        
                        $js.="\"bw_in\":" . js_escape($this->max_bandwidth_in_cfg) . ", ";
                        $js.="\"bw_out\":" . js_escape($this->max_bandwidth_out_cfg) . ", ";
        
                        $js.="\"name\":" . js_escape($this->name) . ", ";
                        $js.="\"overlibwidth\":\"" . $this->overlibheight . "\", ";
                        $js.="\"overlibheight\":\"" . $this->overlibwidth . "\", ";
                        $js.="\"overlibcaption\":" . js_escape($this->overlibcaption) . ", ";
                }
                $vias = "\"via\": [";
                foreach ($this->vialist as $via)
                                $vias .= sprintf("[%d,%d,'%s'],", $via[0], $via[1],$via[2]);
                $vias .= "],";
                $vias = str_replace("],],", "]]", $vias);
                $vias = str_replace("[],", "[]", $vias);
                $js .= $vias;

                $js.="},\n";
                return $js;
        }
};

// vim:ts=4:sw=4:
?>