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annotate src/streamed-graph.ts @ 28:c751380b70c5

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uniqueness problem with NamedNodes in set
author drewp@bigasterisk.com
date Sun, 15 Dec 2019 12:38:11 -0800
parents e0f5da648199
children e54941d93356
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1
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2 // these are just for timebank- move them out
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3 import '@polymer/polymer/lib/elements/dom-bind.js';
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5 import { PolymerElement, html } from '@polymer/polymer';
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6 import { render } from 'lit-html';
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7 import { N3Store } from "n3"
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8 import { customElement, property, computed } from '@polymer/decorators';
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9
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10 import { GraphView } from './graph_view';
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11 import { StreamedGraphClient } from './streamed_graph_client';
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13 interface VersionedGraph { version: number, store: N3Store | undefined };
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15 @customElement('streamed-graph')
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16 class StreamedGraph extends PolymerElement {
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17 @property({ type: String })
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18 url: string = '';
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20 @property({ type: Object })
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21 graph!: VersionedGraph;
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23 @property({ type: Boolean })
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24 expanded: boolean = false;
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26 @computed('expanded')
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27 get expandAction() {
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28 return this.expanded ? '-' : '+';
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29 }
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31 @property({ type: String })
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32 status: string = '';
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34 sg!: StreamedGraphClient;
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35 graphView!: Element;
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36 graphViewDirty = true;
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38 static get template() {
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39 return html`
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40 <link rel="stylesheet" href="../src/streamed-graph.css">
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41 <div id="ui">
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42 <span class="expander"><button on-click="toggleExpand">{{expandAction}}</button></span>
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43 StreamedGraph <a href="{{url}}">[source]</a>:
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44 {{status}}
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45 </div>
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46 <div id="graphView"></div>`;
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47 }
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49 ready() {
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50 super.ready();
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51 this.graph = { version: -1, store: undefined };
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52 this.graphView = (this.shadowRoot as ShadowRoot).getElementById("graphView") as Element;
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54 this._onUrl(this.url); // todo: watch for changes and rebuild
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55 if (this.expanded) {
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56 this.redrawGraph();
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57 }
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58 }
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60 toggleExpand(ev: Event) {
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61 this.expanded = !this.expanded;
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62 if (this.expanded) {
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63 this.redrawGraph()
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64 } else {
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65 this.graphViewDirty = false;
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66 render(null, this.graphView);
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67 }
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68 }
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70 redrawGraph() {
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71 this.graphViewDirty = true;
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72 requestAnimationFrame(this._redrawLater.bind(this));
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73 }
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75 _onUrl(url: string) {
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76 if (this.sg) { this.sg.close(); }
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77 this.sg = new StreamedGraphClient(
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78 url,
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79 this.onGraphChanged.bind(this),
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80 this.set.bind(this, 'status'),
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81 [],//window.NS,
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82 []
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83 );
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84 }
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86 onGraphChanged() {
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87 this.graph = {
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88 version: this.graph.version + 1,
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89 store: this.sg.store
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90 };
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91 if (this.expanded) {
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92 this.redrawGraph();
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93 }
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94 }
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96 _redrawLater() {
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97 if (!this.graphViewDirty) return;
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98
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99 if ((this.graph as VersionedGraph).store && this.graph.store) {
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100 render(new GraphView(this.url, this.graph.store).makeTemplate(), this.graphView);
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101 this.graphViewDirty = false;
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102 } else {
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103 render(html`<span>waiting for data...</span>`, this.graphView);
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104 }
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105 }
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106 }