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depgraph.php
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depgraph.php
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<?php
class DepGraph{
private $html = null;
/**
* Constructs the graph
* @param unknown $data an associative array representing the graph
* @param unknown $options an associative array containing the options for the graph
*/
function __construct($data,$options){
$this->options = $options;
// set default options
$this->options['uid'] = isset($options['uid'])?$options['uid']:uniqid();
// construct the graph dom
$this->setData($data);
$this->constructLayout();
$this->update();
$this->postProcesses();
}
/**
* Construct the layout container for the graph
*/
function constructLayout(){
$this->html = new DOMDocument();
$root = $this->root = $this->html->createElement('div');
$root->setAttribute("id", "graph-container-".$this->options['uid']);
$this->html->appendChild($root);
$chart = $this->chart = $this->html->createElement('div');
$chart->setAttribute('id', 'chart-'.$this->options['uid']);
$root->appendChild($chart);
$this->svg = $this->html->createElement('svg');
$this->svg->setAttribute('width', "100%");
$this->svg->setAttribute('height', "100%");
$chart->appendChild($this->svg);
$this->vis = $this->html->createElement('g');
$margin = $this->data['graph']['#style']['margin'];
$transform = 'translate('.removeUnit($margin['left']).','.removeUnit($margin['top']).') scale(1)';
$this->vis->setAttribute('transform', $transform);
$this->svg->appendChild($this->vis);
$this->setSVGDefs();
}
/**
* Copy and prepare the data for graph html dom creation
* @param unknown $data
*/
function setData($data){
$this->data = $data;
$this->prepareData();
}
/**
* Prepare the data setting default values and resolving formatting
*/
function prepareData(){
$this->resolveReferences($this->data);
// setting internal ids, word position, and link properties
$this->id = 0;
$position=0;
foreach($this->data['graph']['words'] as &$word){
$word['#id'] = $this->id++;
$word['#position'] = $position++;
}
foreach($this->data['graph']['links'] as &$link){
$link['#id'] = $this->id++;
$link['#properties'] = null;
}
if(isset($this->data['graph']['chunks'])){
foreach($this->data['graph']['chunks'] as &$chunk){
$chunk['#id'] = $this->id++;
}
}
$this->data['graph']['#style'] = isset($this->data['graph']['#style'])?$this->data['graph']['#style']:array();
$this->data['graph']['#word-style']=isset($this->data['graph']['#word-style'])?$this->data['graph']['#word-style']:array();
$this->data['graph']['#link-style']=isset($this->data['graph']['#link-style'])?$this->data['graph']['#link-style']:array();
$this->data['graph']['#chunk-style']=isset($this->data['graph']['#chunk-style'])?$this->data['graph']['#chunk-style']:array();
$globalStyle = &$this->data['graph']['#style'];
$wordStyle = &$this->data['graph']['#word-style'];
$linkStyle = &$this->data['graph']['#link-style'];
$chunkStyle = &$this->data['graph']['#chunk-style'];
// Set default value for requiered fields
// Global Style
$globalStyle['margin'] = isset($globalStyle['margin'])?$globalStyle['margin']:array('top'=>'50px','right'=>'20px','bottom'=>'20px','left'=>'20px');
$globalStyle['margin']['top'] = isset($globalStyle['margin-top'])?$globalStyle['margin-top']:$globalStyle['margin']['top'];
$globalStyle['margin']['right'] = isset($globalStyle['margin-right'])?$globalStyle['margin-right']:$globalStyle['margin']['right'];
$globalStyle['margin']['left'] = isset($globalStyle['margin-left'])?$globalStyle['margin-left']:$globalStyle['margin']['left'];
$globalStyle['margin']['bottom'] = isset($globalStyle['margin-bottom'])?$globalStyle['margin-bottom']:$globalStyle['margin']['bottom'];
$globalStyle['background-color'] = isset($globalStyle['background-color'])?$globalStyle['background-color']:'white';
$globalStyle['font-family'] = isset($globalStyle['font-family'])?$globalStyle['font-family']:'inherit';
// Words Style
$wordStyle['margin'] = isset($wordStyle['margin'])?$wordStyle['margin']:array('top'=>'10px','right'=>'15px','bottom'=>'10px','left'=>'15px');
$wordStyle['sub-margin'] = isset($wordStyle['sub-margin'])?$wordStyle['sub-margin']:array('top'=>'4px','right'=>'4px','bottom'=>'4px','left'=>'4px');
$wordStyle['font-size'] = isset($wordStyle['font-size'])?$wordStyle['font-size']:'14px';
$wordStyle['sub-font-size'] = isset($wordStyle['sub-font-size'])?$wordStyle['sub-font-size']:'10px';
$wordStyle['color'] = isset($wordStyle['color'])?$wordStyle['color']:'black';
$wordStyle['sub-color'] = isset($wordStyle['sub-color'])?$wordStyle['sub-color']:'black';
$wordStyle['font-weight']=isset($wordStyle['font-weight'])?$wordStyle['font-weight']:'normal';
$wordStyle['sub-font-weight']=isset($wordStyle['sub-font-weight'])?$wordStyle['sub-font-weight']:'normal';
$wordStyle['font-style']=isset($wordStyle['font-style'])?$wordStyle['font-style']:'normal';
$wordStyle['sub-font-style']=isset($wordStyle['sub-font-style'])?$wordStyle['sub-font-style']:'normal';
// Links Style
$linkStyle['margin'] = isset($linkStyle['margin'])?$linkStyle['margin']:array('top'=>'5px','right'=>'10px','bottom'=>'10px','left'=>'10px');
$linkStyle['font-size'] = isset($linkStyle['font-size'])?$linkStyle['font-size']:'12px';
$linkStyle['color'] = isset($linkStyle['color'])?$linkStyle['color']:'black';
$linkStyle['link-color'] = isset($linkStyle['link-color'])?$linkStyle['link-color']:'#000000';
$linkStyle['link-size'] = isset($linkStyle['link-size'])?$linkStyle['link-size']:'2px';
$linkStyle['font-weight']= isset($linkStyle['font-weight'])?$linkStyle['font-weight']:'normal';
$linkStyle['font-style']=isset($linkStyle['font-style'])?$linkStyle['font-style']:'normal';
$linkStyle['oriented']=isset($linkStyle['oriented'])?$linkStyle['oriented']:true;
$linkStyle['align']=isset($linkStyle['align'])?$linkStyle['align']:'center';
$linkStyle['higlighted'] = false;
// Chunks Style
$chunkStyle['margin'] = isset($chunkStyle['margin'])?$chunkStyle['margin']:array('top'=>'10px','right'=>'10px','bottom'=>'10px','left'=>'10px');
$chunkStyle['sub-margin'] = isset($chunkStyle['sub-margin'])?$chunkStyle['sub-margin']:array('top'=>'4px','right'=>'4px','bottom'=>'4px','left'=>'4px');
$chunkStyle['font-size'] = isset($chunkStyle['font-size'])?$chunkStyle['font-size']:'12px';
$chunkStyle['sub-font-size'] = isset($chunkStyle['sub-font-size'])?$chunkStyle['sub-font-size']:'10px';
$chunkStyle['background-color'] = isset($chunkStyle['background-color'])?$chunkStyle['background-color']:'transparent';
$chunkStyle['color'] = isset($chunkStyle['color'])?$chunkStyle['color']:'black';
$chunkStyle['sub-color'] = isset($chunkStyle['sub-color'])?$chunkStyle['sub-color']:'black';
$chunkStyle['border-color'] = isset($chunkStyle['border-color'])?$chunkStyle['border-color']:'black';
$chunkStyle['font-weight']=isset($chunkStyle['font-weight'])?$chunkStyle['font-weight']:'normal';
$chunkStyle['sub-font-weight']=isset($chunkStyle['sub-font-weight'])?$chunkStyle['sub-font-weight']:'normal';
$chunkStyle['font-style']=isset($chunkStyle['font-style'])?$chunkStyle['font-style']:'normal';
$chunkStyle['sub-font-style']=isset($chunkStyle['sub-font-style'])?$chunkStyle['sub-font-style']:'normal';
$chunkStyle['border-size']=isset($chunkStyle['border-size'])?$chunkStyle['border-size']:'1px';
}
function setSVGDefs(){
$defs = $this->html->createElement("defs");
$this->svg->appendChild($defs);
$marker = $this->html->createElement("marker");
$defs->appendChild($marker);
$marker->setAttribute('id', 'arrow-'.$this->options['uid']);
$marker->setAttribute('viewBox', "0 0 10 10");
$marker->setAttribute('refX', '8');
$marker->setAttribute('refY', '5');
$marker->setAttribute('markerUnits', 'strokeWidth');
$marker->setAttribute('orient', 'auto');
$marker->setAttribute('markerWidth', '3');
$marker->setAttribute('markerHeight', '3');
$polyline = $this->html->createElement('polyline');
$marker->appendChild($polyline);
$polyline->setAttribute('points', '0,0 10,5 0,10 1,5');
}
/**
* Update the graph with the data
*/
function update(){
if(isset($this->data['graph']['chunks'])){
$this->prepareChunks();
}
foreach($this->data['graph']['words'] as &$word){
$this->createWord($word);
}
if(isset($this->data['graph']['chunks'])){
foreach($this->data['graph']['chunks'] as &$chunk){
$this->createChunk($chunk);
}
}
$this->preprocessLinksPosition();
foreach($this->data['graph']['links'] as &$link){
$this->createLink($link);
}
}
function postProcesses(){
$margin = $this->data['graph']['#style']['margin'];
$transform = 'translate('.removeUnit($margin['left']).','.(removeUnit($margin['top'])+removeUnit($margin['bottom'])+$this->absMaxLinkStrate*40).') scale(1)';
$this->vis->setAttribute('transform', $transform);
$bbox = $this->computeApproximateBBox();
$this->width = $bbox['width'];
$this->height = $bbox['height'];
$this->svg->setAttribute("width", $bbox['width'].'px');
$this->svg->setAttribute("height", $bbox['height'].'px');
$this->setStyleAttr($this->chart, "width", $bbox['width'].'px');
$this->setStyleAttr($this->chart, "height", $bbox['height'].'px');
$this->setStyleAttr($this->chart, "display", 'block');
$this->setStyleAttr($this->root, "display", 'block');
$this->setStyleAttr($this->chart, "border", '1px solid black');
}
/**
* Returns the style of a data element by searching inner style then global style and finally default value
* @param unknown $element
* @param unknown $property
* @param unknown $defaultValue
* @return Ambigous <NULL, unknown>
*/
function getStyle($element,$property,$defaultValue = null){
$value = null;
if(isset($element['#style']) && isset($element['#style'][$property])){
$value = $element['#style'][$property];
}else {
$classname = $this->getType($element);
if($classname != 'undefined' && isset($this->data['graph']['#'.$classname.'-style'][$property])){
$value = $this->data['graph']['#'.$classname.'-style'][$property];
}else{
$value = $defaultValue;
}
}
return $value;
}
/**
* return the type of an element
* @param unknown $element
* @return string (word,link,chunk) or undefined
*/
function getType($element){
if(isset($element['#position'])){
return 'word';
}else if(isset($element['source']) && isset($element['target'])){
return 'link';
}else if(isset($element['elements'])){
return 'chunk';
}else{
return 'undefined';
}
}
/**
* Get a word by its original id
* @param unknown $id
* @return unknown|NULL
*/
function &getWordNodeByOriginalId($id){
$return = null;
foreach ($this->data['graph']['words'] as $word){
if($word['id'] == $id){
return $word;
}
}
return $return;
}
function &getChunkNodeByOriginalId($id){
$return = null;
foreach ($this->data['graph']['chunks'] as $chunk){
if($chunk['id'] == $id){
return $chunk;
}
}
return $return;
}
/**
* Resolve the graph data references (@...)
* @param unknown $data
*/
function resolveReferences($data){
}
/**
* Get a word by its position (#position)
* @param unknown $position
*/
function &getWordByPosition($position){
$return =null;
foreach($this->data['graph']['words'] as &$word){
if($word['#position'] == $position){
return $word;
}
}
return $return;
}
/**
* returns the computed size of the box of an word svg element
* @param unknown $element
* @return array the bbox
*/
function getWordBBox($element,$node=null,&$bbox = null){
$yMagicNumber = -13;
if(!$node){
$node = $element['#node'];
}
if($bbox == null){
$bbox = array('x'=>0,'y'=>0,'width'=>0,'height'=>0);
}
if(get_class($node) == 'DOMText' || $node->tagName == 'tspan'){
$strlen;
if(get_class($node) == 'DOMText'){
$strlen = strlen($node->wholeText);
}else{
$strlen = strlen($node->nodeValue);
}
$fontSize = $this->getStyle($element, 'font-size', '12px');
$unit = substr($fontSize, -2);
$factor = 1;
if($unit == 'em'){
// no idea how to get the body default px size.. :/
trigger_error("Cannot handle em unit to compute bbox size");
$factor = 12 * substr($fontSize,0,strlen($fontSize)-2);
}else if($unit == 'px'){
$factor = round(substr($fontSize,0,strlen($fontSize)-2)/2);
}else{
$factor = round($fontSize/2);
}
$width = $factor * $strlen;
$bbox['width'] = max($width,$bbox['width']);
$yOffset = 15;//$node->getAttribute('dy');
$bbox['height'] += $yOffset;
$bbox['y'] = $yMagicNumber;
}else if($node->tagName == 'g' && $node->hasChildNodes()){
foreach($node->childNodes as $child){
$this->getWordBBox($element,$child,$bbox);
}
}else if($node->tagName == 'text' && $node->hasChildNodes()){
foreach($node->childNodes as $child){
$this->getWordBBox($element,$child,$bbox);
}
}else {
}
return $bbox;
}
/**
* returns the computed size of the box of an chunk svg element
* @param unknown $chunk
* @return array the bbox
*/
function getChunkBBox($chunk){
return $chunk['#bbox'];
/*$totalBBox = array('x'=>0,'y'=>0,'width'=>0,'height'=>0);
foreach($chunk['elements'] as $element){
$bbox = $this->getWordBBox($element);
$totalBBox['width'] += $bbox['width'];
}
$wordMargins = $this->data['graph']['#word-style']['margin'];
$wordMargin = removeUnit($wordMargin['left'])+removeUnit($wordMargin['right']);
$totalBBox['width'] += count($chunk['elements'])*$wordMargin;*/
}
/**
* Set the a pair of key/value to the style attribute of a dom element
* @param unknown $element
* @param unknown $key
* @param unknown $value
*/
function setStyleAttr(&$element,$key,$value){
$style = $element->getAttribute('style');
$count = 0;
$style = preg_replace('/('.$key.':)(.*?);/', "$1$value;", $style, -1, $count);
if(!$count){
$style .= " ".$key.":".$value.";";
}
$element->setAttribute('style',$style);
}
/**
* Add chunk groups before words (svg layers issue)
*/
function prepareChunks(){
foreach($this->data['graph']['chunks'] as &$chunk){
// create the dom node
$node = $chunk['#node'] = &$this->html->createElement('g');
$node->setAttribute('class', 'chunk');
$node->setAttribute('foo', $this->id++);
$this->vis->appendChild($node);
}
}
/**
* Add a word node to the graph dom
* @param unknown $word
*/
function createWord(&$word){
// create the dom node
$node = $this->html->createElement('g');
$node->setAttribute('class', 'word');
$this->vis->appendChild($node);
$word['#node'] = &$node;
// retrieve style variables
$fontSize = $this->getStyle($word,'font-size');
$subfontSize = $this->getStyle($word,'sub-font-size');
$color = $this->getStyle($word,'color');
$subColor = $this->getStyle($word,'sub-color');
$fontWeight = $this->getStyle($word,'font-weight');
$subfontWeight = $this->getStyle($word,'sub-font-weight');
$fontStyle = $this->getStyle($word,'font-style');
$subfontStyle = $this->getStyle($word,'sub-font-style');
$margin = $this->getStyle($word, 'margin');
$rect = $this->html->createElement('rect');
$node->appendChild($rect);
$text = $this->html->createElement('text');
$node->appendChild($text);
$label = $this->html->createElement('tspan',$word['label']);
$this->setStyleAttr($label,'fill',$color);
$this->setStyleAttr($label, 'font-style', $fontStyle);
$this->setStyleAttr($label, 'font-weight', $fontWeight);
$this->setStyleAttr($label, 'font-size', $fontSize);
$text->appendChild($label);
$sublabels = array();
foreach($word['sublabel'] as $sublabel){
$item = &$sublabels[];
$item = $this->html->createElement('tspan',$sublabel);
$this->setStyleAttr($item, 'font-style', $subfontStyle);
$this->setStyleAttr($item, 'font-size', $subfontSize);
$this->setStyleAttr($item, 'font-weight', $subfontWeight);
$this->setStyleAttr($item, 'fill', $subColor);
$item->setAttribute('x', '0px');
$item->setAttribute('dy', '1.25em');
$text->appendChild($item);
}
$highlight = 'none';
if($this->getStyle($word,'highlighted',false)){
$highlight = 'yellow';
}
$bbox = $this->getWordBBox($word);
$rect->setAttribute('x',0);
$rect->setAttribute('y',$bbox['y']);
$rect->setAttribute('rx',10);
$rect->setAttribute('ry',10);
$rect->setAttribute('width',$bbox['width']);
$rect->setAttribute('height',$bbox['height']);
$this->setStyleAttr($rect, 'stroke',"transparent");
$this->setStyleAttr($rect, 'fill',$highlight);
$this->setStyleAttr($rect, 'stroke-width',1);
$previousSibling = $this->getWordByPosition($word['#position']-1);
if($previousSibling){
$transform = getTransformValues($previousSibling['#node']);
$bbox = $this->getWordBBox($previousSibling);
$x = removeUnit(addPxs(array($transform['translate'][0],$bbox['width'],$margin['right'],$margin['left'])));
$y = removeUnit($margin['top']);
setGroupPosition($node,$x,$y);
}else{
$x = removeUnit($margin['left']);
$y = removeUnit($margin['top']);
setGroupPosition($node,$x,$y);
}
}
/**
* Add a chunk node to the graph dom
* @param unknown $chunk
*/
function createChunk(&$chunk){
// create the dom node
$node = &$chunk['#node'];
$rect = $this->html->createElement("rect");
$min = array('x' => 99999, 'y' => 99999);
$max = array('x'=>0,'y'=>0);
$n = count($chunk['elements']);
for($i=0;$i<$n;$i++){
$word = $this->getWordNodeByOriginalId($chunk['elements'][$i]);
$transform = getTransformValues($word['#node']);
$coord = array('x'=>$transform['translate'][0],'y'=>$transform['translate'][1]);
$bbox = $this->getWordBBox($word);
if($coord['x']+$bbox['x']<$min['x']){
$min['x']=$coord['x']+$bbox['x'];
}
if($coord['y']+$bbox['y']<$min['y']){
$min['y']=$coord['y']+$bbox['y'];
}
if($coord['x']+$bbox['width']+$bbox['x']>$max['x']){
$max['x'] = $coord['x']+$bbox['width']+$bbox['x'];
}
if($coord['y']+$bbox['height']+$bbox['y']>$max['y']){
$max['y'] =$coord['y']+$bbox['height']+$bbox['y'];
}
}
$node->appendChild($rect);
$margin = $this->getStyle($chunk,'margin');
$fontSize = $this->getStyle($chunk,'font-size');
$subfontSize = $this->getStyle($chunk,'sub-font-size');
$color = $this->getStyle($chunk,'color');
$subColor = $this->getStyle($chunk,'sub-color');
$fontWeight = $this->getStyle($chunk,'font-weight');
$subfontWeight = $this->getStyle($chunk,'sub-font-weight');
$fontStyle = $this->getStyle($chunk,'font-style');
$subfontStyle = $this->getStyle($chunk,'sub-font-style');
$backgroundColor = $this->getStyle($chunk,'background-color');
$borderColor = $this->getStyle($chunk,'border-color');
$borderSize = $this->getStyle($chunk,'border-size');
$line = $this->html->createElement('line');
$line->setAttribute('y1',addPxs(array($max['y'],2*removeUnit($margin['top']))));
$line->setAttribute('x1',0);
$line->setAttribute('y2',addPxs(array($max['y'],2*removeUnit($margin['top']))));
$line->setAttribute('x2',$max['x']-$min['x']+removeUnit($margin['left'])+removeUnit($margin['right']));
$this->setStyleAttr($line,'stroke',$borderColor);
$this->setStyleAttr($line,'stroke-width',$borderSize);
$node->appendChild($line);
$text = $this->html->createElement("text");
$text->setAttribute('y',addPxs(array(20,$max['y'],2*removeUnit($margin['top']))));
$node->appendChild($text);
$tspan = $this->html->createElement('tspan',$chunk['label']);
$text->appendChild($tspan);
$this->setStyleAttr($tspan, 'fill', $color);
$this->setStyleAttr($tspan, 'font-style', $fontStyle);
$this->setStyleAttr($tspan, 'font-weight', $fontWeight);
$this->setStyleAttr($tspan, 'font-size', $fontSize);
if(isset($chunk['sublabel']) && count($chunk['sublabel'])){
foreach($chunk['sublabel'] as $sublabel){
$subtspan = $this->html->createElement('tspan',$sublabel);
$text->appendChild($subtspan);
$this->setStyleAttr($subtspan,'font-size',$subfontSize);
$this->setStyleAttr($subtspan,'font-style',$subfontStyle);
$this->setStyleAttr($subtspan,'font-weight',$subfontWeight);
$this->setStyleAttr($subtspan,'fill',$subColor);
$subtspan->setAttribute('dx',-(strlen($sublabel)-1)*removeUnit($subfontSize));
$subtspan->setAttribute('dy','1.25em');
}
}
$offset = $bbox['height'];
$width = $max['x']-$min['x']+removeUnit($margin['left'])+removeUnit($margin['right']);
$heightPx= addPxs(array($max['y'],-$min['y'],$offset,2*removeUnit($margin['top']),20));
$bbox = $this->getWordBBox($word,$text);
$text->setAttribute('x',-$bbox['width']/2+$width/2);
$rect->setAttribute('x',0);
$rect->setAttribute('y',0);
$rect->setAttribute('rx',10);
$rect->setAttribute('ry',10);
$rect->setAttribute('width',$width);
$rect->setAttribute('height',$heightPx);
$this->setStyleAttr($rect,'fill',$backgroundColor);
$this->setStyleAttr($rect,'stroke',$borderColor);
$this->setStyleAttr($rect,'stroke-width',$borderSize);
$chunk['#bbox'] = array('x'=>0,'y'=>0,'width'=>$width,'height'=>removeUnit($heightPx));
setGroupPosition($node,$min['x']-removeUnit($margin['left']),$min['y']-removeUnit($margin['top']));
}
/**
* Add a link node to the graph dom
* @param unknown $link
*/
function createLink(&$link){
// create the dom node
$node = $this->html->createElement('g');
$node->setAttribute('class', 'link');
$this->vis->appendChild($node);
$link['#node'] = &$node;
$p = $this->getLinkProperties($link);
// retrieve style variables
$margin = $this->getStyle($link,'margin');
$fontSize = $this->getStyle($link,'font-size');
$color = $this->getStyle($link,'color');
$linkColor = $this->getStyle($link,'link-color');
$linkSize = $this->getStyle($link,'link-size');
$fontWeight = $this->getStyle($link,'font-weight');
$fontStyle = $this->getStyle($link,'font-style');
$oriented = $this->getStyle($link,'oriented');
$align = $this->getStyle($link,'align');
$highlighted = $this->getStyle($link,'highlighted',false);
$strokeDasharray = $this->getStyle($link,'stroke-dasharray','none');
// for origin arcs (nodestart == null)
$originArc = false;
if(!$p['nodeStart']){
$p['nodeStart'] = $p['nodeEnd'];
$originArc = true;
}
// Positionning
$hdir = ($this->getNodePosition($p['nodeEnd'])-$this->getNodePosition($p['nodeStart'])>0)?1:-1;
$vdir = ($p['strate']>0)?1:-1;
$transf0 = getTransformValues($p['nodeStart']['#node']);
$transf1 = getTransformValues($p['nodeEnd']['#node']);
$X0 = $transf0['translate'];
$X1 = $transf1['translate'];
$SBBox=0;
$EBBox=0;
if($this->getType($p['nodeStart'])=='chunk'){
$SBBox = $this->getChunkBBox($p['nodeStart']);
}else{
$SBBox = $this->getWordBBox($p['nodeStart']);
}
if($this->getType($p['nodeStart'])=='chunk'){
$EBBox = $this->getChunkBBox($p['nodeEnd']);
}else{
$EBBox = $this->getWordBBox($p['nodeEnd']);
}
$Sdx = $SBBox['width']/2;
$Edx = $EBBox['width']/2;
$minOffset = 3;
$SxOffset = ($hdir>0)?5*$p['offsetXmin']+$minOffset:-5*$p['offsetXmax']-$minOffset;
$ExOffset = ($hdir>0)?-5*$p['offsetXmax']-$minOffset:5*$p['offsetXmin']+$minOffset;
$arcSize = 5;
$x0 = $X0[0]+$Sdx+$SxOffset;
$x1 = $X1[0]+$Edx+$ExOffset;
$h = $x1-$x0-$hdir*2*$arcSize;
//For missing main label and constant labels height
if(!isset($this->wordY) || $this->wordY==null){
$this->wordY=0;
$this->wordHeight=0;
foreach($this->data['graph']['words'] as $word){
$bbox = $this->getWordBBox($word);
if($this->wordY>$bbox['y']){
$this->wordY=$bbox['y'];
}
if($this->wordHeight<$bbox['height']){
$this->wordHeight=$bbox['height'];
}
}
}
// end of dirty code
$SchunkCase0 = ($this->getType($p['nodeStart'])=='chunk')?$SBBox['height']:$SBBox['height']+$this->wordY;
$EchunkCase0 = ($this->getType($p['nodeEnd'])=='chunk')?$EBBox['height']:$EBBox['height']+$this->wordY;
$SchunkCase1 = ($this->getType($p['nodeStart'])=='chunk')?0:$this->wordY;
$EchunkCase1 = ($this->getType($p['nodeEnd'])=='chunk')?0:$this->wordY;
$Syanchor = ($vdir>0)?$SchunkCase1:$SchunkCase0;
$Eyanchor = ($vdir>0)?$EchunkCase1:$EchunkCase0;
$y0 = $X0[1]+$Syanchor;
$y1 = $X1[1]+$Eyanchor;
$height = 15;
$strateOffset = 30;
$v0 = -$vdir*$height-$strateOffset*$p['strate'];//-SchunkCase;
if($originArc){
$v0 = -$vdir*$height-$strateOffset*$vdir*$this->absMaxLinkStrate;
}
$v1 = -($v0+$y0-$y1);
$laf0 = (1+$hdir*$vdir)/2;
$laf1 = (1+$hdir*$vdir)/2;
if($highlighted){
$color2 = 'yellow';
}else{
$color2 = 'none';
}
$highlightPath = $this->html->createElement('path');
$node->appendChild($highlightPath);
$path = $this->html->createElement('path');
$node->appendChild($path);
if($originArc){
$highlightPath->setAttribute('d',"M ".$x0.",".($y0+$v0)." v ".(-$v0));
$path->setAttribute('d',"M ".$x0.",".($y0+$v0)." v ".(-$v0));
}else{
$highlightPath->setAttribute('d',"M ".$x0.",".$y0." v ".$v0." a 5 5 0 0 ".$laf0." ".$hdir*$arcSize." ".(-$vdir*$arcSize)." h ".$h." a 5 5 0 0 ".$laf1." ".$hdir*$arcSize." ".$vdir*$arcSize." v ".$v1);
$path->setAttribute('d',"M ".$x0.",".$y0." v ".$v0." a 5 5 0 0 ".$laf0." ".$hdir*$arcSize." ".(-$vdir*$arcSize)." h ".$h." a 5 5 0 0 ".$laf1." ".$hdir*$arcSize." ".$vdir*$arcSize." v ".$v1);
}
$highlightPath->setAttribute('stroke',$color2);
$highlightPath->setAttribute('stroke-width',removeUnit($linkSize)+3);
$highlightPath->setAttribute('fill','none');
$path->setAttribute('stroke',$linkColor);
$path->setAttribute('stroke-dasharray',$strokeDasharray);
$path->setAttribute('stroke-width',$linkSize);
$path->setAttribute('fill','none');
if($oriented){
$path->setAttribute('marker-end','url(#arrow-'.$this->options['uid'].')');
}
// Label
if(isset($link['label'])){
$text = $this->html->createElement('text',$link['label']);
$node->appendChild($text);
$this->setStyleAttr($text, 'fill', $color);
$this->setStyleAttr($text, 'font-weight', $fontWeight);
$this->setStyleAttr($text, 'font-style', $fontSize);
$this->setStyleAttr($text, 'font-style', $fontStyle);
$textBBox = $this->getWordBBox($link,$text);
$text->setAttribute('x',-$textBBox['width']/2+$x0+$h/2+$hdir*$arcSize);
$text->setAttribute('y',removeUnit(addPxs(array(-removeUnit($margin['top']),$y0,$v0,-$vdir*$arcSize))));
}
}
/************************************************************/
/** Crossing Algo **/
/************************************************************/
/**
* returns true if a node (word or chunk) is outside a frame defined by a link set of properties,
* false otherwise
*/
function isOutside($object,$properties){
// factor 2, in order to take into account left and right in the positions
return $this->getNodePosition($object)*2< $properties['min']*2 || $this->getNodePosition($object)*2> $properties['max']*2;
}
/**
* returns true if a node (word or chunk) is inside a frame defined by a link set of properties,
* false otherwise
*/
function isInside($object,$properties){
// factor 2, in order to take into account left and right in the positions
return $this->getNodePosition($object)*2> $properties['min']*2 && $this->getNodePosition($object)*2< $properties['max']*2;
}
/**
* returns true if two link cross each other, false otherwise
* @param link1
* @param link2
* @returns {Boolean}
*/
function crossed($link1,$link2){
$p1 = $this->getLinkProperties($link1);
$p2= $this->getLinkProperties($link2);
return ($this->isInside($p1['nodeStart'],$p2) && $this->isOutside($p1['nodeEnd'],$p2))
|| ($this->isInside($p1['nodeEnd'],$p2) && $this->isOutside($p1['nodeStart'],$p2));
}
/**
* set up the links position and strate (height of the edge and "innerness")
* @param links
*/
function preprocessLinksPosition(){
$links = &$this->data['graph']['links'];
// factor 2, in order to take into account left and right in the positions
$this->sortLinksByLength();
$n = count($links);
$table = array();
for($i=0;$i<$n;++$i){
$link = &$links[$i];
$p = &$this->getLinkProperties($link);
$k = 1;
while(true){
if(!isset($table[$k]) || $table[$k]==null){ // nothing exist at this strate : fill it and break
$table[$k]= array();
for($j=$p['min']*2;$j<$p['max']*2;$j++){
$table[$k][$j]=$link;
}
$p['strate'] = $k;
$this->setMaxStrate($k);
break;
}
$crossing = null;
for($j=$p['min']*2;$j<$p['max']*2;$j++){ // see if there is something where the link lies
if(isset($table[$k][$j]) && $table[$k][$j]!=null){
$crossing = $table[$k][$j];
if($this->crossed($link,$crossing)){
break;
}
}
}
if($crossing!=null){ // if there is something
if($this->crossed($link,$crossing)){ // real crossing
$k=-1;
while(true){
if(!isset($table[$k]) || $table[$k]==null){ // nothing exist at this strate : fill it and break
$table[$k]=array();
for($j=$p['min']*2;$j<$p['max']*2;$j++){ // fill in the strate
$table[$k][$j]=$link;
}
$p['strate'] = $k; // set the strate
$this->setMaxStrate($k);
break;
}
$dcrossing = null;
for($j=$p['min']*2;$j<$p['max']*2;$j++){ // see if there is something where the link lies
if(isset($table[$k][$j]) && $table[$k][$j]!=null){
$dcrossing = $table[$k][$j];
break;
}
}
if($dcrossing!=null){ // even if real cross, just jump next line
$k--;
}else{
for($j=$p['min']*2;$j<$p['max']*2;$j++){
$table[$k][$j]=$link;
}
$p['strate'] = $k;
$this->setMaxStrate($k);
break;
}
}
break;
}else{
$k++;
}
}else{
for($j=$p['min']*2;$j<$p['max']*2;$j++){ // fill in the table
$table[$k][$j]=$link;
}
$p['strate'] = $k; // set the strate
$this->setMaxStrate($k);
break;
}
}
}
for($i =0;$i<$n;$i++){
$link = &$links[$i];
$p = &$this->getLinkProperties($link);
$kstep;
if($p['strate']>0){
$kstep = -1;
}else{
$kstep = 1;
}
for($k = $p['strate'] ; $k!=0 ; $k+=$kstep){
$altLink = &$table[$k][$p['min']*2];
if($altLink!=null && $altLink!=$link){
$p2 = &$this->getLinkProperties($altLink);
if($p2['min'] == $p['min']){
$p2['offsetXmin']++;
}
}
$altLink = &$table[$k][$p['max']*2-1];
if($altLink!=null && $altLink!=$link){
$p2 = &$this->getLinkProperties($altLink);
if($p2['max'] == $p['max']){
$p2['offsetXmax']++;
}
}
}
}
}
function setMaxStrate($strate){
if(!isset($this->absMaxLinkStrate)){
$this->absMaxLinkStrate = 0;
$this->minLinkStrate = 0;
$this->maxLinkStrate = 0;
}
$absStrate = abs($strate);
$this->absMaxLinkStrate = ($this->absMaxLinkStrate<$absStrate)?$absStrate:$this->absMaxLinkStrate;
$this->minLinkStrate = ($this->minLinkStrate>$strate)?$strate:$this->minLinkStrate;
$this->maxLinkStrate = ($this->maxLinkStrate<$strate)?$absStrate:$this->maxLinkStrate;
}
/**
* sort the links by length..
* @param links
*/
function sortLinksByLength(){
$me = $this;
$links = &$this->data['graph']['links'];
usort($links,function($a,$b) use ($me){
$p1 = $me->getLinkProperties($a);
$p2 = $me->getLinkProperties($b);
return $p1['length']-$p2['length'];
});
}
/**
* lazy load the computed properties of a link.
* Those properties are used to compute the position of the links in order
* to minimize crossing
* @param link
* @returns the properties object
*/
function &getLinkProperties(&$link){
if($link['#properties'] == null){
$properties = array();
$properties['nodeStart'] = $this->getWordNodeByOriginalId($link['source']);
if($properties['nodeStart'] == null){
$properties['nodeStart'] = $this->getChunkNodeByOriginalId($link['source']);
}
$properties['nodeEnd'] = $this->getWordNodeByOriginalId($link['target']);
if($properties['nodeEnd'] == null){
$properties['nodeEnd'] = $this->getChunkNodeByOriginalId($link['target']);
}
if($this->getNodePosition($properties['nodeStart'])<$this->getNodePosition($properties['nodeEnd'])){
$properties['min'] = $this->getNodePosition($properties['nodeStart']);
$properties['max'] = $this->getNodePosition($properties['nodeEnd']);
$properties['hdir'] = 1;
}else{
$properties['max'] = $this->getNodePosition($properties['nodeStart']);
$properties['min'] = $this->getNodePosition($properties['nodeEnd']);
$properties['hdir'] = -1;
}
$properties['vdir'] = 1; // oriented top
$properties['offsetXmax'] = 0;
$properties['offsetXmin'] = 0;
$properties['strate'] = 0;
$properties['length'] = $properties['max']-$properties['min'];
if(!$properties['nodeStart']){ // for orign arc to be processed first in anti crossing algo
$properties['length'] = 0;
}
$properties['outer']=0;
$link['#properties'] = $properties;
}
return $link['#properties'];
}
/**
* Returns the position of the node (word or chunk).
* For the non trivial case of chunk, the node in middle of the chunk
* is taken for the reference positon in the computing of links positionning
* @param node
* @returns integer (position of the node or -1 if origin : [node = null])
*/
function getNodePosition($element){
if($element){
if(isset($element['#position'])){
return $element['#position'];
}else{ // we are dealing with a chunk
$middle = floor(count($element['elements'])/2);
$middleNode = $this->getWordNodeByOriginalId($element['elements'][$middle]);
return $middleNode['#position'];
}
}else{
return -1;
}
}
function computeApproximateBBox(){
$totalBBox = array('x'=>0,'y'=>0,'width'=>0,'height'=>0);
foreach($this->data['graph']['words'] as $word){
$bbox = $this->getWordBBox($word);
$width = $bbox['width'];
$totalBBox['width']+= $width;
}
$wordMargin = $this->data['graph']['#word-style']['margin'];
$wordMargins = count($this->data['graph']['words'])*(removeUnit($wordMargin['left'])+removeUnit($wordMargin['right']));
$totalBBox['width']+=$wordMargins;
$chunkMargin = $this->data['graph']['#chunk-style']['margin'];
$chunkMargins = count($this->data['graph']['#chunk-style']['margin'])*(removeUnit($chunkMargin['left'])+removeUnit($chunkMargin['right']));
$totalBBox['width']+=$chunkMargins;
$height = $this->wordHeight;
if(isset($this->data['graph']['chunks'])){
foreach($this->data['graph']['chunks'] as $chunk){
$height = ($heigth<$chunk['#bbox']['height'])?$chunk['#bbox']['height']:$height;
}
}
$globalMargins = $this->data['graph']['#style']['margin'];
$hm = removeUnit($globalMargins['top'])+removeUnit($globalMargins['bottom']);
$h = $hm + $height + (1+$this->maxLinkStrate - $this->minLinkStrate)*40 ;
$totalBBox['height']+=$h;
return $totalBBox;
}
/**
* Returns the svg/html of the graph
* @return string
*/
function getHTML(){
return $this->html->saveHTML();
}
/**
* Create the image frame (title, etc.)
*/
function surroundWithFrame($content){
global $base_url; // retrieve the base url of the installation
$title = isset($this->options['title'])?preg_replace("/'/","\'",$this->options['title']):'';
$title = str_replace("\n", " ", $title);
$prepend = '<a id="graph-' . $this->options['uid'] . '" name="graph-' . $this->options['uid'] . '"></a>';
$append = '<div>' . ((!isset($this->options['wrapped']))? $title : '') . '</div>';
return $prepend . $content . $append;
}
/**
* Returns the img/html of the graph
*/
function getHTMLImage($targetdir = 'tmp',$uid=null,$urlprepend = ''){
$uid = $uid?$uid:uniqid();
$svg_file = $targetdir."/svg_img_" . $uid;
$svg_source = $this->html->saveXML($this->svg);