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annotate src/index.ts @ 86:6ec759f9009f

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build fixes, dead code, format
author drewp@bigasterisk.com
date Thu, 25 Nov 2021 18:15:08 -0800
parents 067d66a45a51
children 955cde1550c3
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rev   line source
86
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1 import { LitElement, html, render, TemplateResult } from "lit";
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2 import { customElement, property } from "lit/decorators.js";
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4 import { Store } from "n3";
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5
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6 import { GraphView } from "./graph_view";
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7 import { StreamedGraphClient } from "./streamed_graph_client";
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8 import { style, addFontToRootPage } from "./style";
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9
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10 // export * from "./graph_queries";
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12 export interface VersionedGraph {
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13 version: number;
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14 store: Store;
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15 }
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16
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17 @customElement("streamed-graph")
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18 export class StreamedGraph extends LitElement {
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19 @property({ type: String })
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20 url: string = "";
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22 @property({ type: Object })
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23 graph!: VersionedGraph;
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25 @property({ type: Boolean })
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26 expanded: boolean = false;
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27
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28 @property({ type: String })
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29 status: string = "";
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31 sg!: StreamedGraphClient;
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32 graphViewDirty = true;
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34 static styles = style;
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35
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36 render() {
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37 const expandAction = this.expanded ? "-" : "+";
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38 return html`
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39 <div id="ui">
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40 <span class="expander"
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41 ><button @click="${this.toggleExpand}">${expandAction}</button></span
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42 >
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43 StreamedGraph <a href="${this.url}">[source]</a>: ${this.status}
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44 </div>
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45 <div id="graphView"></div>
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46 `;
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47 }
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49 connectedCallback() {
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50 super.connectedCallback();
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51 addFontToRootPage();
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52 const emptyStore = new Store();
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53 this.graph = { version: -1, store: emptyStore };
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55 this._onUrl(this.url); // todo: watch for changes and rebuild
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56 if (this.expanded) {
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57 this.redrawGraph();
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58 }
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59 }
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61 toggleExpand() {
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62 this.expanded = !this.expanded;
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63 if (this.expanded) {
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64 this.redrawGraph();
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65 } else {
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66 this.graphViewDirty = false;
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67 this._graphAreaClose();
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68 }
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69 }
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71 redrawGraph() {
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72 this.graphViewDirty = true;
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73 requestAnimationFrame(this._redrawLater.bind(this));
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74 }
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76 _onUrl(url: string) {
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77 if (this.sg) {
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78 this.sg.close();
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79 }
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80 this.sg = new StreamedGraphClient(
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81 url,
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82 this.onGraphChanged.bind(this),
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83 (st) => {
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84 this.status = st;
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85 },
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86 [], //window.NS,
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87 []
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88 );
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89 }
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91 onGraphChanged() {
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92 this.graph = {
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93 version: this.graph.version + 1,
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94 store: this.sg.store,
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95 };
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96 if (this.expanded) {
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97 this.redrawGraph();
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98 }
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99 this.dispatchEvent(
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100 new CustomEvent("graph-changed", { detail: { graph: this.graph } })
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101 );
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102 }
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103
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104 _redrawLater() {
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105 if (!this.graphViewDirty) return;
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106
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107 if ((this.graph as VersionedGraph).store && this.graph.store) {
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108 this._graphAreaShowGraph(new GraphView(this.url, this.graph.store));
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109 this.graphViewDirty = false;
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110 } else {
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111 this._graphAreaShowPending();
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112 }
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113 }
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114
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115 _graphAreaClose() {
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116 this._setGraphArea(html``);
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117 }
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118
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119 _graphAreaShowPending() {
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120 this._setGraphArea(html` <span>waiting for data...</span> `);
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121 }
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122
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123 _graphAreaShowGraph(graphView: GraphView) {
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124 this._setGraphArea(graphView.makeTemplate());
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125 }
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126
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127 _setGraphArea(tmpl: TemplateResult) {
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128 const el = this.shadowRoot?.getElementById("graphView");
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129 if (!el) {
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130 return;
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131 }
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132 render(tmpl, el);
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133 }
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134 }
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135
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136 declare global {
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137 interface HTMLElementTagNameMap {
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138 "streamed-graph": StreamedGraph;
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139 }
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140 }
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141
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142 // // allow child nodes to combine a few graphs and statics
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143 // //<streamed-graph id="timebankGraph" graph="{{graph}}" expanded="true">
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144 // // <member-graph url="graph/timebank/events"></member-graph>
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145 // // <member-graph url="/some/static.n3"></member-graph>
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146 // //</streamed-graph>