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annotate src/render/GraphView.ts @ 107:042bd3361339

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author drewp@bigasterisk.com
date Sun, 13 Mar 2022 22:02:30 -0700
parents src/render/graph_view.ts@2468f2227d22
children 5e6840229a05
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1 import { html, TemplateResult } from "lit";
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2 import { DataFactory, Literal, NamedNode, Quad, Store, Term } from "n3";
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3 import { NodeDisplay } from "./NodeDisplay";
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4 import { SuffixLabels } from "../layout/suffixLabels";
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5 import { Layout } from "../layout/Layout";
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6 import { TableDesc, ViewConfig } from "../layout/ViewConfig";
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7
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8 const { namedNode } = DataFactory;
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9
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10 // https://github.com/rdfjs/N3.js/issues/265
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11 if ((Literal.prototype as any).hashCode === undefined) {
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12 (Literal.prototype as any).hashCode = () => 0;
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13 }
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14 if ((NamedNode.prototype as any).hashCode === undefined) {
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15 (NamedNode.prototype as any).hashCode = () => 0;
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16 }
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17 export class GraphView {
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18 url: string;
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19 view: View;
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20 graph: Store;
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21 nodeDisplay: NodeDisplay;
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22 constructor(url: string, viewUrl: string, graph: Store) {
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23 this.url = url;
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24 this.view = new View(viewUrl);
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25 this.graph = graph;
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26
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27 const labels = new SuffixLabels();
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28 this._addLabelsForAllTerms(this.graph, labels);
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29
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30 this.view.ready.then(() => {
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31 this._addLabelsForAllTerms(this.view.graph, labels);
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32 });
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33 this.nodeDisplay = new NodeDisplay(labels);
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34 }
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35
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36 _addLabelsForAllTerms(graph: Store, labels: SuffixLabels) {
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37 graph.forEach(
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38 (q: Quad) => {
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39 if (q.subject.termType === "NamedNode") {
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40 labels.planDisplayForNode(q.subject);
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41 }
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42 if (q.predicate.termType === "NamedNode") {
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43 labels.planDisplayForNode(q.predicate);
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44 }
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45 if (q.object.termType === "NamedNode") {
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46 labels.planDisplayForNode(q.object);
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47 }
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48 if (q.object.termType === "Literal" && q.object.datatype) {
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49 labels.planDisplayForNode(q.object.datatype);
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50 }
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51 },
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52 null,
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53 null,
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54 null,
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55 null
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56 );
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57 }
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58
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59 _subjPredObjsBlock(subj: NamedNode) {
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60 const columns = predsForSubj(this.graph, subj);
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61 return html`
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62 <div class="subject">
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63 ${this.nodeDisplay.render(subj)}
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64 <!-- todo: special section for uri/type-and-icon/label/comment -->
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65 <div>
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66 ${columns.map((p) => {
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67 return this._predObjsBlock(subj, p);
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68 })}
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69 </div>
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70 </div>
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71 `;
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72 }
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73
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74 _objCell(obj: Term) {
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75 return html`
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76 <div class="object">
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77 ${this.nodeDisplay.render(obj)}
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78 <!-- indicate what source or graph said this stmt -->
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79 </div>
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80 `;
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81 }
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82
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83 _predObjsBlock(subj: NamedNode, pred: NamedNode) {
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84 const objsSet = new Set<Term>();
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85 this.graph.forEach(
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86 (q: Quad) => {
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87 objsSet.add(q.object);
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88 },
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89 subj,
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90 pred,
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91 null,
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92 null
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93 );
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94 const objs = Array.from(objsSet.values());
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95 objs.sort();
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96 return html`
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97 <div class="predicate">
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98 ${this.nodeDisplay.render(pred)}
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99 <div>${objs.map(this._objCell.bind(this))}</div>
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100 </div>
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101 `;
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102 }
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103
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104 _drawObj(obj: Term): TemplateResult {
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105 return html` <div>${this.nodeDisplay.render(obj)}</div> `;
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106 }
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107
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108 _drawColumnHead(pred: NamedNode): TemplateResult {
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109 return html` <th>${this.nodeDisplay.render(pred)}</th> `;
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110 }
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111
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112 _thead(layout: MultiSubjsTypeBlockLayout): TemplateResult {
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113 return html`
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114 <thead>
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115 <tr>
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116 <th></th>
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117 ${layout.preds.map(this._drawColumnHead.bind(this))}
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118 </tr>
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119 </thead>
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120 `;
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121 }
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122
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123 _msbCell(layout: MultiSubjsTypeBlockLayout, subj: NamedNode) {
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124 return (pred: NamedNode): TemplateResult => {
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125 const objs = layout.graphCells.get(layout.makeCellKey(subj, pred));
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126 if (!objs || !objs.size) {
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127 return html` <td></td> `;
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128 }
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129 const objsList = Array.from(objs);
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130 objsList.sort();
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131 return html` <td>${objsList.map(this._drawObj.bind(this))}</td> `;
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132 };
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133 }
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134
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135 _instanceRow(layout: MultiSubjsTypeBlockLayout) {
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136 return (subj: NamedNode): TemplateResult => {
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137 return html`
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138 <tr>
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139 <td>${this.nodeDisplay.render(subj)}</td>
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140 ${layout.preds.map(this._msbCell(layout, subj))}
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141 </tr>
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142 `;
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143 };
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144 }
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145
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146 _multiSubjsTypeBlock(byType: TypeToSubjs, table: TableDesc) {
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147 const layout = new MultiSubjsTypeBlockLayout(this.graph, byType, table);
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148
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149 let typeNames = [html`${this.nodeDisplay.render(table.primary)}`];
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150 if (table.joins) {
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151 typeNames.push(html` joined with [`);
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152 for (let j of table.joins) {
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153 typeNames.push(html`${this.nodeDisplay.render(j)}`);
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154 }
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155 typeNames.push(html`]`);
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156 }
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157
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158 return html`
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159 <div>[icon] Resources of type ${typeNames}</div>
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160 <div class="typeBlockScroll">
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161 <table class="typeBlock">
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162 ${this._thead(layout)}
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163 ${layout.subjs.map(this._instanceRow(layout))}
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164 </table>
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165 </div>
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166 `;
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167 }
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168
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169 async makeTemplate(): Promise<TemplateResult> {
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170 await this.view.ready;
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171 const { byType, typesPresent, untypedSubjs } = groupByRdfType(this.graph);
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172 let viewTitle = html` (no view)`;
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173 if (this.view.url) {
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174 viewTitle = html` using view
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175 <a href="${this.view.url}">${this.view.label()}</a>`;
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176 }
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177 const tables = this.view.toplevelTables(typesPresent);
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178 return html`
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179 <section>
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180 <h2>
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181 Current graph (<a href="${this.url}">${this.url}</a>)${viewTitle}
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182 </h2>
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183 <div>
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184 <!-- todo: graphs and provenance.
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185 These statements are all in the
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186 <span data-bind="html: $root.createCurie(graphUri())">...</span> graph.-->
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187 </div>
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188 ${tables.map((t: TableDesc) => this._multiSubjsTypeBlock(byType, t))}
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189 <div class="spoGrid">
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190 ${untypedSubjs.map(this._subjPredObjsBlock.bind(this))}
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191 </div>
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192 </section>
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193 `;
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194 }
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195 }