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annotate src/graph_view.ts @ 94:a5f53d397526

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author drewp@bigasterisk.com
date Wed, 12 Jan 2022 22:09:20 -0800
parents 955cde1550c3
children 4d19759d0d9a
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1 import { html, TemplateResult } from "lit";
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2 import { DataFactory, Literal, NamedNode, Quad, Store, Term, Util } from "n3";
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3 import { SuffixLabels } from "./suffixLabels";
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4 import {
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5 groupByRdfType,
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6 MultiSubjsTypeBlockLayout,
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7 predsForSubj,
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8 TypeToSubjs,
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9 } from "./tabulate";
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10 import { View } from "./view_loader";
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11
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12 const { namedNode } = DataFactory;
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13
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14 // https://github.com/rdfjs/N3.js/issues/265
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15 if ((Literal.prototype as any).hashCode === undefined) {
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16 (Literal.prototype as any).hashCode = () => 0;
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17 }
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18 if ((NamedNode.prototype as any).hashCode === undefined) {
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19 (NamedNode.prototype as any).hashCode = () => 0;
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20 }
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21 class NodeDisplay {
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22 labels: SuffixLabels;
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23 constructor(labels: SuffixLabels) {
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24 this.labels = labels;
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25 }
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26 render(n: Term | NamedNode): TemplateResult {
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27 if (Util.isLiteral(n)) {
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28 n = n as Literal;
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29 let dtPart: any = "";
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30 if (
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31 n.datatype &&
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32 n.datatype.value != "http://www.w3.org/2001/XMLSchema#string" && // boring
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33 n.datatype.value !=
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34 "http://www.w3.org/1999/02/22-rdf-syntax-ns#langString" // boring
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35 ) {
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36 dtPart = html`
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37 ^^<span class="literalType"> ${this.render(n.datatype)} </span>
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38 `;
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39 }
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40 return html` <span class="literal">${n.value}${dtPart}</span> `;
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41 }
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43 if (Util.isNamedNode(n)) {
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44 n = n as NamedNode;
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45 let shortened = false;
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46 let uriValue: string = n.value;
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47 for (let [long, short] of [
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48 ["http://www.w3.org/1999/02/22-rdf-syntax-ns#", "rdf:"],
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49 ["http://www.w3.org/2000/01/rdf-schema#", "rdfs:"],
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50 ["http://purl.org/dc/elements/1.1/", "dc:"],
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51 ["http://www.w3.org/2001/XMLSchema#", "xsd:"],
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52 ]) {
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53 if (uriValue.startsWith(long)) {
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54 uriValue = short + uriValue.substr(long.length);
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55 shortened = true;
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56 break;
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57 }
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58 }
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59 if (!shortened) {
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60 let dn: string | undefined = this.labels.getLabelForNode(uriValue);
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61 if (dn === undefined) {
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62 throw new Error(`dn=${dn}`);
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63 }
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64 uriValue = dn;
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65 }
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66
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67 return html` <a class="graphUri" href="${n.value}">${uriValue}</a> `;
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68 }
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70 return html` [${n.termType} ${n.value}] `;
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71 }
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72 }
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74 export class GraphView {
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75 url: string;
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76 view: View;
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77 graph: Store;
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78 nodeDisplay: NodeDisplay;
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79 constructor(url: string, viewUrl: string, graph: Store) {
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80 this.url = url;
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81 this.view = new View(viewUrl);
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82 this.graph = graph;
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83
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84 const labels = new SuffixLabels();
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85 this._addLabelsForAllTerms(labels);
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86 this.nodeDisplay = new NodeDisplay(labels);
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87 }
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89 _addLabelsForAllTerms(labels: SuffixLabels) {
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90 return this.graph.forEach(
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91 (q: Quad) => {
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92 if (q.subject.termType === "NamedNode") {
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93 labels.planDisplayForNode(q.subject);
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94 }
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95 if (q.predicate.termType === "NamedNode") {
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96 labels.planDisplayForNode(q.predicate);
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97 }
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98 if (q.object.termType === "NamedNode") {
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99 labels.planDisplayForNode(q.object);
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100 }
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101 if (q.object.termType === "Literal" && q.object.datatype) {
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102 labels.planDisplayForNode(q.object.datatype);
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103 }
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104 },
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105 null,
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106 null,
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107 null,
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108 null
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109 );
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110 }
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111
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112 _subjPredObjsBlock(subj: NamedNode) {
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113 const columns = predsForSubj(this.graph, subj);
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114 return html`
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115 <div class="subject">
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116 ${this.nodeDisplay.render(subj)}
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117 <!-- todo: special section for uri/type-and-icon/label/comment -->
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118 <div>
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119 ${columns.map((p) => {
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120 return this._predObjsBlock(subj, p);
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121 })}
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122 </div>
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123 </div>
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124 `;
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125 }
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126
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127 _objCell(obj: Term) {
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128 return html`
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129 <div class="object">
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130 ${this.nodeDisplay.render(obj)}
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131 <!-- indicate what source or graph said this stmt -->
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132 </div>
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133 `;
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134 }
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135
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136 _predObjsBlock(subj: NamedNode, pred: NamedNode) {
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137 const objsSet = new Set<Term>();
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138 this.graph.forEach(
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139 (q: Quad) => {
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140 objsSet.add(q.object);
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141 },
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142 subj,
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143 pred,
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144 null,
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145 null
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146 );
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147 const objs = Array.from(objsSet.values());
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148 objs.sort();
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149 return html`
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150 <div class="predicate">
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151 ${this.nodeDisplay.render(pred)}
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152 <div>${objs.map(this._objCell.bind(this))}</div>
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153 </div>
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154 `;
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155 }
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156
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157 _drawObj(obj: Term): TemplateResult {
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158 return html` <div>${this.nodeDisplay.render(obj)}</div> `;
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159 }
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160
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161 _drawColumnHead(pred: NamedNode): TemplateResult {
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162 return html` <th>${this.nodeDisplay.render(pred)}</th> `;
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163 }
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164
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165 _thead(layout: MultiSubjsTypeBlockLayout): TemplateResult {
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166 return html`
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167 <thead>
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168 <tr>
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169 <th></th>
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170 ${layout.preds.map(this._drawColumnHead.bind(this))}
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171 </tr>
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172 </thead>
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173 `;
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174 }
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175
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176 _msbCell(layout: MultiSubjsTypeBlockLayout, subj: NamedNode) {
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177 return (pred: NamedNode): TemplateResult => {
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178 const objs = layout.graphCells.get(layout.makeCellKey(subj, pred));
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179 if (!objs || !objs.size) {
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180 return html` <td></td> `;
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181 }
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182 const objsList = Array.from(objs);
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183 objsList.sort();
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184 return html` <td>${objsList.map(this._drawObj.bind(this))}</td> `;
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185 };
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186 }
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187
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188 _instanceRow(layout: MultiSubjsTypeBlockLayout) {
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189 return (subj: NamedNode): TemplateResult => {
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190 return html`
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191 <tr>
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192 <td>${this.nodeDisplay.render(subj)}</td>
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193 ${layout.preds.map(this._msbCell(layout, subj))}
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194 </tr>
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195 `;
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196 };
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197 }
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198
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199 _multiSubjsTypeBlock(byType: TypeToSubjs, typeUri: NamedNode) {
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200 const layout = new MultiSubjsTypeBlockLayout(this.graph, byType, typeUri);
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201
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202 return html`
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203 <div>[icon] ${this.nodeDisplay.render(typeUri)} type resources</div>
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204 <div class="typeBlockScroll">
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205 <table class="typeBlock">
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206 ${this._thead(layout)} ${layout.subjs.map(this._instanceRow(layout))}
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207 </table>
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208 </div>
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209 `;
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210 }
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211
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212 async makeTemplate(): Promise<TemplateResult> {
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213 await this.view.ready;
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214 const { byType, typesPresent, untypedSubjs } = groupByRdfType(this.graph);
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215 let viewTitle = html` (no view)`;
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216 if (this.view.url) {
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217 viewTitle = html` using view <a href="${this.view.url}">${this.view.label()}</a>`;
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218 }
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219 const typesToShow = this.view.typesToShow(typesPresent);
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220 return html`
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221 <section>
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222 <h2>
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223 Current graph (<a href="${this.url}">${this.url}</a>)${viewTitle}
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224 </h2>
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225 <div>
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226 <!-- todo: graphs and provenance.
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227 These statements are all in the
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228 <span data-bind="html: $root.createCurie(graphUri())">...</span> graph.-->
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229 </div>
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230 ${typesToShow.map((t: NamedNode) =>
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231 this._multiSubjsTypeBlock(byType, t)
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232 )}
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233 <div class="spoGrid">
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234 ${untypedSubjs.map(this._subjPredObjsBlock.bind(this))}
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235 </div>
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236 </section>
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237 `;
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238 }
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239 }