<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"> <style>
.KEYW {color: #933;}
.COMM {color: #bbb; font-style: italic;}
.NUMB {color: #393;}
.STRN {color: #393;}
.REGX {color: #339;}
.line {border-right: 1px dotted #666; color: #666; font-style: normal;}
</style></head><body><pre><span class='line'> 1</span> <span class="COMM">/**
<span class='line'> 2</span> * creates a new zoom behavior
<span class='line'> 3</span> */</span><span class="WHIT">
<span class='line'> 4</span> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">zoom</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">d3.zoom</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">on</span><span class="PUNC">(</span><span class="STRN">"zoom"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">zoomHandler</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 5</span>
<span class='line'> 6</span> </span><span class="COMM">/**
<span class='line'> 7</span> * creates svg object and associated attributes
<span class='line'> 8</span> * applies the zoom behavior to svg
<span class='line'> 9</span> */</span><span class="WHIT">
<span class='line'> 10</span> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">svg</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">d3.select</span><span class="PUNC">(</span><span class="STRN">"svg"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 11</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">call</span><span class="PUNC">(</span><span class="NAME">zoom</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 12</span> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">svg.attr</span><span class="PUNC">(</span><span class="STRN">"width"</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 13</span> </span><span class="NAME">height</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">svg.attr</span><span class="PUNC">(</span><span class="STRN">"height"</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 14</span>
<span class='line'> 15</span> </span><span class="COMM">/**
<span class='line'> 16</span> * creates node object and associated attributes
<span class='line'> 17</span> */</span><span class="WHIT">
<span class='line'> 18</span> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">node</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 19</span> </span><span class="NAME">r</span><span class="PUNC">=</span><span class="NUMB">12</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 20</span> </span><span class="NAME">color</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">d3.scaleOrdinal</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 21</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">domain</span><span class="PUNC">(</span><span class="PUNC">[</span><span class="STRN">"citing"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"input"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"cited"</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 22</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">range</span><span class="PUNC">(</span><span class="PUNC">[</span><span class="STRN">' #01d7c0'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">' #8b90fe '</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">' #a15eb2 '</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 23</span> </span><span class="NAME">yscale</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">d3.scaleOrdinal</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 24</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">domain</span><span class="PUNC">(</span><span class="PUNC">[</span><span class="STRN">"citing"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"input"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"cited"</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 25</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">range</span><span class="PUNC">(</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">200</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">400</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 26</span> </span><span class="NAME">toRemove</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 27</span>
<span class='line'> 28</span> </span><span class="COMM">/**
<span class='line'> 29</span> * creates link object
<span class='line'> 30</span> */</span><span class="WHIT">
<span class='line'> 31</span> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">link</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 32</span>
<span class='line'> 33</span> </span><span class="COMM">/**
<span class='line'> 34</span> * creates a background
<span class='line'> 35</span> * creates a click functionality of the background
<span class='line'> 36</span> */</span><span class="WHIT">
<span class='line'> 37</span> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">rect</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">svg.append</span><span class="PUNC">(</span><span class="STRN">"rect"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 38</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"x"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 39</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"y"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 40</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"height"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">height</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 41</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"width"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">width</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 42</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">"fill"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">'white'</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 43</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">on</span><span class="PUNC">(</span><span class="STRN">'click'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">clickRect</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 44</span>
<span class='line'> 45</span> </span><span class="COMM">/**
<span class='line'> 46</span> * creates a new simulation
<span class='line'> 47</span> * updates the positions of the links and nodes when the
<span class='line'> 48</span> state of the layout has changed (simulation has advanced by a tick)
<span class='line'> 49</span> */</span><span class="WHIT">
<span class='line'> 50</span> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">simulation</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">d3.forceSimulation</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 51</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">force</span><span class="PUNC">(</span><span class="STRN">"link"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">d3.forceLink</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">id</span><span class="PUNC">(</span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">d.doi</span><span class="PUNC">;</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">distance</span><span class="PUNC">(</span><span class="NUMB">100</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">strength</span><span class="PUNC">(</span><span class="NUMB">1</span><span class="PUNC">)</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 52</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">force</span><span class="PUNC">(</span><span class="STRN">"collide"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">d3.forceCollide</span><span class="PUNC">(</span><span class="NUMB">50</span><span class="PUNC">)</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 53</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">force</span><span class="PUNC">(</span><span class="STRN">"charge"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">d3.forceManyBody</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">strength</span><span class="PUNC">(</span><span class="PUNC">-</span><span class="NUMB">30</span><span class="PUNC">)</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 54</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">force</span><span class="PUNC">(</span><span class="STRN">"center"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">d3.forceCenter</span><span class="PUNC">(</span><span class="NAME">width</span><span class="PUNC">/</span><span class="NUMB">2</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">height</span><span class="PUNC">/</span><span class="NUMB">2</span><span class="PUNC">)</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 55</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">force</span><span class="PUNC">(</span><span class="STRN">"yscale"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">d3.forceY</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">strength</span><span class="PUNC">(</span><span class="NUMB">1</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">y</span><span class="PUNC">(</span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">yscale</span><span class="PUNC">(</span><span class="NAME">d.group</span><span class="PUNC">)</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 56</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">on</span><span class="PUNC">(</span><span class="STRN">"tick"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">tickHandler</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 57</span>
<span class='line'> 58</span> </span><span class="COMM">/**
<span class='line'> 59</span> * creates group element
<span class='line'> 60</span> */</span><span class="WHIT">
<span class='line'> 61</span> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">g</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">svg.append</span><span class="PUNC">(</span><span class="STRN">"g"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 62</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"class"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"everything"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 63</span>
<span class='line'> 64</span> </span><span class="COMM">/**
<span class='line'> 65</span> * loads JSON data and calls the update function
<span class='line'> 66</span> */</span><span class="WHIT">
<span class='line'> 67</span> </span><span class="NAME">d3.json</span><span class="PUNC">(</span><span class="STRN">"json_text.json"</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">then</span><span class="PUNC">(</span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">graph</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 68</span> </span><span class="WHIT"> </span><span class="NAME">update</span><span class="PUNC">(</span><span class="NAME">graph.links</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">graph.nodes</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 69</span> </span><span class="PUNC">}</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 70</span>
<span class='line'> 71</span> </span><span class="COMM">/**
<span class='line'> 72</span> * calls update functions for links and nodes
<span class='line'> 73</span> * adds the nodes and links to the simulation
<span class='line'> 74</span> * @param {object} nodes - nodes
<span class='line'> 75</span> * @param {object} links - links
<span class='line'> 76</span> */</span><span class="WHIT">
<span class='line'> 77</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">update</span><span class="PUNC">(</span><span class="NAME">links</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">nodes</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 78</span> </span><span class="WHIT"> </span><span class="NAME">updateLinks</span><span class="PUNC">(</span><span class="NAME">links</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 79</span> </span><span class="WHIT"> </span><span class="NAME">updateNodes</span><span class="PUNC">(</span><span class="NAME">nodes</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 80</span>
<span class='line'> 81</span> </span><span class="WHIT"> </span><span class="NAME">simulation</span><span class="WHIT">
<span class='line'> 82</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">nodes</span><span class="PUNC">(</span><span class="NAME">nodes</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 83</span> </span><span class="WHIT"> </span><span class="NAME">simulation.force</span><span class="PUNC">(</span><span class="STRN">"link"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 84</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">links</span><span class="PUNC">(</span><span class="NAME">links</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 85</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 86</span>
<span class='line'> 87</span> </span><span class="COMM">/**
<span class='line'> 88</span> * initializes and shows links
<span class='line'> 89</span> * @param {object} links - links
<span class='line'> 90</span> */</span><span class="WHIT">
<span class='line'> 91</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">updateLinks</span><span class="PUNC">(</span><span class="NAME">links</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 92</span> </span><span class="WHIT"> </span><span class="NAME">link</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">g.append</span><span class="PUNC">(</span><span class="STRN">"g"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 93</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">selectAll</span><span class="PUNC">(</span><span class="STRN">".link"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 94</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">data</span><span class="PUNC">(</span><span class="NAME">links</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 95</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">enter</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 96</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">append</span><span class="PUNC">(</span><span class="STRN">"line"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 97</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">"stroke-width"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"1px"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 98</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">"stroke"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"#999"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 99</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'marker-end'</span><span class="PUNC">,</span><span class="NAME">marker</span><span class="PUNC">(</span><span class="STRN">"#999"</span><span class="PUNC">)</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>100</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"class"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"link"</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>101</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>102</span>
<span class='line'>103</span> </span><span class="COMM">/**
<span class='line'>104</span> * initializes and shows nodes with circles and texts
<span class='line'>105</span> * creates a new drag behavior and applies it to the circles
<span class='line'>106</span> * creates a click functionality of the circles and texts
<span class='line'>107</span> * @param {object} nodes - nodes
<span class='line'>108</span> */</span><span class="WHIT">
<span class='line'>109</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">updateNodes</span><span class="PUNC">(</span><span class="NAME">nodes</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>110</span> </span><span class="WHIT"> </span><span class="NAME">node</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">g.selectAll</span><span class="PUNC">(</span><span class="STRN">".node"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>111</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">data</span><span class="PUNC">(</span><span class="NAME">nodes</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>112</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">enter</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>113</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">append</span><span class="PUNC">(</span><span class="STRN">"g"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>114</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"class"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"node"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>115</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"initial_x"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">d.dx</span><span class="PUNC">;</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>116</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"initial_y"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">d.dy</span><span class="PUNC">;</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>117</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">call</span><span class="PUNC">(</span><span class="NAME">d3.drag</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>118</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">on</span><span class="PUNC">(</span><span class="STRN">"start"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">dragstarted</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>119</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">on</span><span class="PUNC">(</span><span class="STRN">"drag"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">dragged</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>120</span> </span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>121</span>
<span class='line'>122</span> </span><span class="WHIT"> </span><span class="NAME">node.append</span><span class="PUNC">(</span><span class="STRN">"circle"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>123</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"class"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"circle"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>124</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"r"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">r</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>125</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">"fill"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">color</span><span class="PUNC">(</span><span class="NAME">d.group</span><span class="PUNC">)</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>126</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">on</span><span class="PUNC">(</span><span class="STRN">'click'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">clickNode</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>127</span>
<span class='line'>128</span> </span><span class="WHIT"> </span><span class="NAME">node.append</span><span class="PUNC">(</span><span class="STRN">"text"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>129</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"class"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"text"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>130</span> </span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">"font-size"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"15px"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>131</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">'pointer-events'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">'auto'</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>132</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">text</span><span class="PUNC">(</span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">firstauthor</span><span class="PUNC">(</span><span class="NAME">d.author</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>133</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">on</span><span class="PUNC">(</span><span class="STRN">'click'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">clickNode</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>134</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>135</span>
<span class='line'>136</span> </span><span class="COMM">/**
<span class='line'>137</span> * colors the circle and its links black and removes the previous markings
<span class='line'>138</span> * @param {object} node - node
<span class='line'>139</span> */</span><span class="WHIT">
<span class='line'>140</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">clickNode</span><span class="PUNC">(</span><span class="NAME">node</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>141</span> </span><span class="WHIT"> </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">toRemove</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>142</span> </span><span class="WHIT"> </span><span class="NAME">d3.select</span><span class="PUNC">(</span><span class="NAME">toRemove</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">selectAll</span><span class="PUNC">(</span><span class="STRN">".circle"</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">"stroke"</span><span class="PUNC">,</span><span class="STRN">"none"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>143</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>144</span> </span><span class="WHIT"> </span><span class="NAME">toRemove</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">this.parentNode</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>145</span> </span><span class="WHIT"> </span><span class="NAME">d3.select</span><span class="PUNC">(</span><span class="NAME">this.parentNode</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">selectAll</span><span class="PUNC">(</span><span class="STRN">".circle"</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">"stroke"</span><span class="PUNC">,</span><span class="STRN">"black"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>146</span> </span><span class="WHIT"> </span><span class="NAME">marklink</span><span class="PUNC">(</span><span class="NAME">node</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>147</span> </span><span class="WHIT"> </span><span class="NAME">textfunc</span><span class="PUNC">(</span><span class="NAME">node</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>148</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>149</span>
<span class='line'>150</span> </span><span class="COMM">/**
<span class='line'>151</span> * removes the markings of the circles and their links
<span class='line'>152</span> */</span><span class="WHIT">
<span class='line'>153</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">clickRect</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>154</span> </span><span class="WHIT"> </span><span class="NAME">d3.selectAll</span><span class="PUNC">(</span><span class="STRN">".circle"</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">"stroke"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"none"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>155</span> </span><span class="WHIT"> </span><span class="NAME">d3.selectAll</span><span class="PUNC">(</span><span class="STRN">".link"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>156</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">"stroke"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">"#999"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>157</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'marker-end'</span><span class="PUNC">,</span><span class="NAME">marker</span><span class="PUNC">(</span><span class="STRN">'#999'</span><span class="PUNC">)</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>158</span> </span><span class="WHIT"> </span><span class="NAME">document.getElementById</span><span class="PUNC">(</span><span class="STRN">'textbox'</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">innerHTML</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="STRN">"Click node"</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>159</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>160</span>
<span class='line'>161</span> </span><span class="COMM">/**
<span class='line'>162</span> * sets color of link (line and arrowhead) to black if it is directly connected to node
<span class='line'>163</span> * and to grey otherwise
<span class='line'>164</span> * @param {object} node - node
<span class='line'>165</span> */</span><span class="WHIT">
<span class='line'>166</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">marklink</span><span class="PUNC">(</span><span class="NAME">node</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>167</span> </span><span class="WHIT"> </span><span class="NAME">d3.selectAll</span><span class="PUNC">(</span><span class="STRN">".link"</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>168</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">"stroke"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">o</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>169</span> </span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">isLinkForNode</span><span class="PUNC">(</span><span class="NAME">node</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">o</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">?</span><span class="WHIT"> </span><span class="STRN">"black"</span><span class="WHIT"> </span><span class="PUNC">:</span><span class="WHIT"> </span><span class="STRN">"#999"</span><span class="PUNC">;</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>170</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'marker-end'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">o</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>171</span> </span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">isLinkForNode</span><span class="PUNC">(</span><span class="NAME">node</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">o</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">?</span><span class="WHIT"> </span><span class="NAME">marker</span><span class="PUNC">(</span><span class="STRN">'#000000'</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NAME">marker</span><span class="PUNC">(</span><span class="STRN">'#999'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>172</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>173</span>
<span class='line'>174</span> </span><span class="COMM">/**
<span class='line'>175</span> * returns true if link is directly connected to node and false if it is not
<span class='line'>176</span> * @param {object} node - node
<span class='line'>177</span> * @param {object} link - link
<span class='line'>178</span> */</span><span class="WHIT">
<span class='line'>179</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">isLinkForNode</span><span class="PUNC">(</span><span class="NAME">node</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">link</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>180</span> </span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">link.source.index</span><span class="WHIT"> </span><span class="PUNC">==</span><span class="WHIT"> </span><span class="NAME">node.index</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT"> </span><span class="NAME">link.target.index</span><span class="WHIT"> </span><span class="PUNC">==</span><span class="WHIT"> </span><span class="NAME">node.index</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>181</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>182</span>
<span class='line'>183</span> </span><span class="COMM">/**
<span class='line'>184</span> * creates arrowhead and returns its url
<span class='line'>185</span> * @param {string} color - color of arrowhead
<span class='line'>186</span> */</span><span class="WHIT">
<span class='line'>187</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">marker</span><span class="PUNC">(</span><span class="NAME">color</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>188</span> </span><span class="WHIT"> </span><span class="NAME">svg.append</span><span class="PUNC">(</span><span class="STRN">'defs'</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">append</span><span class="PUNC">(</span><span class="STRN">'marker'</span><span class="PUNC">)</span><span class="COMM">//arrowhead</span><span class="WHIT">
<span class='line'>189</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'id'</span><span class="PUNC">,</span><span class="NAME">color.replace</span><span class="PUNC">(</span><span class="STRN">"#"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">""</span><span class="PUNC">)</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>190</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'viewBox'</span><span class="PUNC">,</span><span class="STRN">'-0 -5 10 10'</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>191</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'refX'</span><span class="PUNC">,</span><span class="NAME">r</span><span class="PUNC">+</span><span class="NUMB">10</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>192</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'refY'</span><span class="PUNC">,</span><span class="NUMB">0</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>193</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'orient'</span><span class="PUNC">,</span><span class="STRN">'auto'</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>194</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'markerWidth'</span><span class="PUNC">,</span><span class="NUMB">10</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>195</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'markerHeight'</span><span class="PUNC">,</span><span class="NUMB">15</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>196</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'xoverflow'</span><span class="PUNC">,</span><span class="STRN">'visible'</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>197</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">append</span><span class="PUNC">(</span><span class="STRN">'svg:path'</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>198</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'d'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="STRN">'M 0,-5 L 10 ,0 L 0,5'</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>199</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">'fill'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">color</span><span class="PUNC">)</span><span class="COMM">//arrowhead color</span><span class="WHIT">
<span class='line'>200</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">style</span><span class="PUNC">(</span><span class="STRN">'stroke'</span><span class="PUNC">,</span><span class="STRN">'none'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>201</span> </span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="STRN">"url("</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">color</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="STRN">")"</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>202</span> </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>203</span>
<span class='line'>204</span> </span><span class="COMM">/**
<span class='line'>205</span> * returns last name of first author
<span class='line'>206</span> * @param {string} authors - the comma-separated string of authors
<span class='line'>207</span> */</span><span class="WHIT">
<span class='line'>208</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">firstauthor</span><span class="PUNC">(</span><span class="NAME">authors</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>209</span> </span><span class="WHIT"> </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="REGX">/,/</span><span class="PUNC">.</span><span class="NAME">test</span><span class="PUNC">(</span><span class="NAME">authors</span><span class="PUNC">)</span><span class="PUNC">==</span><span class="KEYW">false</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>210</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">firstauthor</span><span class="PUNC">=</span><span class="REGX">/^.*\s+([\w\-]+)[\.\s]*$/</span><span class="PUNC">.</span><span class="NAME">exec</span><span class="PUNC">(</span><span class="NAME">authors</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>211</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>212</span> </span><span class="WHIT"> </span><span class="KEYW">else</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>213</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">firstauthor</span><span class="PUNC">=</span><span class="REGX">/^[\s\w\.\-]*\s([\w\-]+)[\.\s]*,.*$/</span><span class="PUNC">.</span><span class="NAME">exec</span><span class="PUNC">(</span><span class="NAME">authors</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>214</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>215</span> </span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">firstauthor</span><span class="PUNC">[</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="WHIT">
<span class='line'>216</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>217</span>
<span class='line'>218</span> </span><span class="COMM">/**
<span class='line'>219</span> * outputs node info to textbox
<span class='line'>220</span> * @param {object} node - data of current node
<span class='line'>221</span> */</span><span class="WHIT">
<span class='line'>222</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">textfunc</span><span class="PUNC">(</span><span class="NAME">node</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>223</span> </span><span class="WHIT"> </span><span class="NAME">document.getElementById</span><span class="PUNC">(</span><span class="STRN">'textbox'</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">innerHTML</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="STRN">"Title:"</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="STRN">'</br>'</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">node.name</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT">
<span class='line'>224</span> </span><span class="WHIT"> </span><span class="STRN">'</br>'</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="STRN">'</br>'</span><span class="PUNC">+</span><span class="STRN">"Author:"</span><span class="PUNC">+</span><span class="WHIT"> </span><span class="STRN">'</br>'</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="NAME">node.author</span><span class="PUNC">+</span><span class="STRN">'</br>'</span><span class="PUNC">+</span><span class="STRN">'</br>'</span><span class="PUNC">+</span><span class="STRN">"Year:"</span><span class="PUNC">+</span><span class="STRN">'</br>'</span><span class="WHIT">
<span class='line'>225</span> </span><span class="WHIT"> </span><span class="PUNC">+</span><span class="NAME">node.year</span><span class="PUNC">+</span><span class="STRN">'</br>'</span><span class="PUNC">+</span><span class="STRN">'</br>'</span><span class="PUNC">+</span><span class="STRN">"doi:"</span><span class="PUNC">+</span><span class="STRN">'</br>'</span><span class="PUNC">+</span><span class="NAME">node.doi</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>226</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>227</span>
<span class='line'>228</span> </span><span class="COMM">/**
<span class='line'>229</span> * updates the positions of the links and nodes
<span class='line'>230</span> */</span><span class="WHIT">
<span class='line'>231</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">tickHandler</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>232</span> </span><span class="WHIT"> </span><span class="NAME">link.attr</span><span class="PUNC">(</span><span class="STRN">"x1"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">d.source.x</span><span class="PUNC">;</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>233</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"y1"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">d.source.y</span><span class="PUNC">;</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>234</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"x2"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">d.target.x</span><span class="PUNC">;</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>235</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"y2"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">d.target.y</span><span class="PUNC">;</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>236</span> </span><span class="WHIT"> </span><span class="NAME">node.attr</span><span class="PUNC">(</span><span class="STRN">"transform"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="KEYW">return</span><span class="WHIT"> </span><span class="STRN">"translate("</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">d.x</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="STRN">", "</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">d.y</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="STRN">")"</span><span class="PUNC">;</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>237</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>238</span>
<span class='line'>239</span> </span><span class="COMM">/**
<span class='line'>240</span> * initializes the dragging of the node
<span class='line'>241</span> * @param {object} node - data of current node
<span class='line'>242</span> */</span><span class="WHIT">
<span class='line'>243</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">dragstarted</span><span class="PUNC">(</span><span class="NAME">node</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>244</span> </span><span class="WHIT"> </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="PUNC">!</span><span class="NAME">d3.event.active</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>245</span> </span><span class="NAME">simulation.alphaTarget</span><span class="PUNC">(</span><span class="NUMB">0.3</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">restart</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>246</span> </span><span class="WHIT"> </span><span class="NAME">node.fx</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">node.x</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>247</span> </span><span class="WHIT"> </span><span class="NAME">node.fy</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">node.y</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>248</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>249</span>
<span class='line'>250</span> </span><span class="COMM">/**
<span class='line'>251</span> * applies the dragging to the node
<span class='line'>252</span> * @param {object} node - data of current node
<span class='line'>253</span> */</span><span class="WHIT">
<span class='line'>254</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">dragged</span><span class="PUNC">(</span><span class="NAME">node</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>255</span> </span><span class="WHIT"> </span><span class="NAME">node.fx</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">d3.event.x</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>256</span> </span><span class="WHIT"> </span><span class="NAME">node.fy</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">d3.event.y</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>257</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>258</span>
<span class='line'>259</span> </span><span class="COMM">/**
<span class='line'>260</span> * resets the positions of the nodes
<span class='line'>261</span> */</span><span class="WHIT">
<span class='line'>262</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">resetGraph</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>263</span> </span><span class="WHIT"> </span><span class="NAME">d3.selectAll</span><span class="PUNC">(</span><span class="STRN">".node"</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">each</span><span class="PUNC">(</span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">d</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>264</span> </span><span class="WHIT"> </span><span class="NAME">d.fx</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">d.initial_x</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>265</span> </span><span class="WHIT"> </span><span class="NAME">d.fy</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">d.initial_y</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>266</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>267</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>268</span>
<span class='line'>269</span> </span><span class="COMM">/**
<span class='line'>270</span> * applies the transformation (zooming or dragging) to the g element
<span class='line'>271</span> */</span><span class="WHIT">
<span class='line'>272</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">zoomHandler</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>273</span> </span><span class="WHIT"> </span><span class="NAME">d3.select</span><span class="PUNC">(</span><span class="STRN">'g'</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">attr</span><span class="PUNC">(</span><span class="STRN">"transform"</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">d3.event.transform</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>274</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>275</span>
<span class='line'>276</span> </span><span class="COMM">/**
<span class='line'>277</span> * transforms svg so that that the zoom is reset
<span class='line'>278</span> */</span><span class="WHIT">
<span class='line'>279</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">resetZoom</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>280</span> </span><span class="WHIT"> </span><span class="NAME">d3.select</span><span class="PUNC">(</span><span class="STRN">'svg'</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>281</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">call</span><span class="PUNC">(</span><span class="NAME">zoom.scaleTo</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">1</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>282</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>283</span>
<span class='line'>284</span> </span><span class="COMM">/**
<span class='line'>285</span> * transforms svg so that it is centered
<span class='line'>286</span> */</span><span class="WHIT">
<span class='line'>287</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">center</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>288</span> </span><span class="WHIT"> </span><span class="NAME">d3.select</span><span class="PUNC">(</span><span class="STRN">'svg'</span><span class="PUNC">)</span><span class="WHIT">
<span class='line'>289</span> </span><span class="WHIT"> </span><span class="PUNC">.</span><span class="NAME">call</span><span class="PUNC">(</span><span class="NAME">zoom.translateTo</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0.5</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NAME">width</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0.5</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NAME">height</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>290</span> </span><span class="PUNC">}</span></pre></body></html>