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3 |
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4 | import { ArrayExt } from '@lumino/algorithm';
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5 | import { Message } from '@lumino/messaging';
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6 | import { AccordionLayout } from './accordionlayout';
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7 | import { SplitLayout } from './splitlayout';
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8 | import { SplitPanel } from './splitpanel';
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9 | import { Title } from './title';
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10 | import { Widget } from './widget';
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11 |
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12 |
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13 |
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14 |
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15 |
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16 |
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17 |
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18 | export class AccordionPanel extends SplitPanel {
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19 | |
20 |
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21 |
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22 |
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23 |
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24 | constructor(options: AccordionPanel.IOptions = {}) {
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25 | super({ ...options, layout: Private.createLayout(options) });
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26 | this.addClass('lm-AccordionPanel');
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27 | }
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28 |
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29 | |
30 |
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31 |
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32 | get renderer(): AccordionPanel.IRenderer {
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33 | return (this.layout as AccordionLayout).renderer;
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34 | }
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35 |
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36 | |
37 |
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38 |
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39 |
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40 |
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41 |
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42 | get titleSpace(): number {
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43 | return (this.layout as AccordionLayout).titleSpace;
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44 | }
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45 | set titleSpace(value: number) {
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46 | (this.layout as AccordionLayout).titleSpace = value;
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47 | }
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48 |
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49 | |
50 |
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51 |
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52 | get titles(): ReadonlyArray<HTMLElement> {
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53 | return (this.layout as AccordionLayout).titles;
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54 | }
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55 |
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56 | |
57 |
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58 |
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59 |
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60 |
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61 |
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62 |
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63 |
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64 | addWidget(widget: Widget): void {
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65 | super.addWidget(widget);
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66 | widget.title.changed.connect(this._onTitleChanged, this);
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67 | }
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68 |
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69 | |
70 |
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71 |
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72 |
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73 |
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74 |
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75 |
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76 |
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77 |
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78 |
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79 | insertWidget(index: number, widget: Widget): void {
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80 | super.insertWidget(index, widget);
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81 | widget.title.changed.connect(this._onTitleChanged, this);
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82 | }
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83 |
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84 | |
85 |
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86 |
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87 |
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88 |
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89 |
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90 |
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91 |
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92 |
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93 |
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94 | handleEvent(event: Event): void {
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95 | super.handleEvent(event);
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96 | switch (event.type) {
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97 | case 'click':
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98 | this._evtClick(event as MouseEvent);
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99 | break;
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100 | case 'keydown':
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101 | this._eventKeyDown(event as KeyboardEvent);
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102 | break;
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103 | }
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104 | }
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105 |
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106 | |
107 |
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108 |
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109 | protected onBeforeAttach(msg: Message): void {
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110 | this.node.addEventListener('click', this);
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111 | this.node.addEventListener('keydown', this);
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112 | super.onBeforeAttach(msg);
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113 | }
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114 |
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115 | |
116 |
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117 |
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118 | protected onAfterDetach(msg: Message): void {
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119 | super.onAfterDetach(msg);
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120 | this.node.removeEventListener('click', this);
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121 | this.node.removeEventListener('keydown', this);
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122 | }
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123 |
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124 | |
125 |
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126 |
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127 | private _onTitleChanged(sender: Title<Widget>): void {
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128 | const index = ArrayExt.findFirstIndex(this.widgets, widget => {
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129 | return widget.contains(sender.owner);
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130 | });
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131 |
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132 | if (index >= 0) {
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133 | (this.layout as AccordionLayout).updateTitle(index, sender.owner);
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134 | this.update();
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135 | }
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136 | }
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137 |
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138 | |
139 |
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140 |
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141 | private _evtClick(event: MouseEvent): void {
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142 | const target = event.target as HTMLElement | null;
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143 |
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144 | if (target) {
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145 | const index = ArrayExt.findFirstIndex(this.titles, title => {
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146 | return title.contains(target);
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147 | });
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148 |
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149 | if (index >= 0) {
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150 | event.preventDefault();
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151 | event.stopPropagation();
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152 |
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153 | const title = this.titles[index];
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154 | const widget = (this.layout as AccordionLayout).widgets[index];
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155 | if (widget.isHidden) {
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156 | title.classList.add('lm-mod-expanded');
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157 | title.setAttribute('aria-expanded', 'true');
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158 | widget.show();
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159 | } else {
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160 | title.classList.remove('lm-mod-expanded');
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161 | title.setAttribute('aria-expanded', 'false');
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162 | widget.hide();
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163 | }
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164 | }
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165 | }
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166 | }
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167 |
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168 | |
169 |
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170 |
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171 | private _eventKeyDown(event: KeyboardEvent): void {
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172 | if (event.defaultPrevented) {
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173 | return;
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174 | }
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175 |
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176 | const target = event.target as HTMLElement | null;
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177 | let handled = false;
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178 | if (target) {
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179 | const index = ArrayExt.findFirstIndex(this.titles, title => {
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180 | return title.contains(target);
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181 | });
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182 |
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183 | if (index >= 0) {
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184 | const keyCode = event.keyCode.toString();
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185 |
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186 |
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187 | if (event.key.match(/Space|Enter/) || keyCode.match(/13|32/)) {
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188 | target.click();
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189 | handled = true;
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190 | } else if (
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191 | this.orientation === 'horizontal'
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192 | ? event.key.match(/ArrowLeft|ArrowRight/) || keyCode.match(/37|39/)
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193 | : event.key.match(/ArrowUp|ArrowDown/) || keyCode.match(/38|40/)
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194 | ) {
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195 |
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196 | const direction =
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197 | event.key.match(/ArrowLeft|ArrowUp/) || keyCode.match(/37|38/)
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198 | ? -1
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199 | : 1;
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200 | const length = this.titles.length;
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201 | const newIndex = (index + length + direction) % length;
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202 |
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203 | this.titles[newIndex].focus();
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204 | handled = true;
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205 | } else if (event.key === 'End' || keyCode === '35') {
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206 |
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207 | this.titles[this.titles.length - 1].focus();
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208 | handled = true;
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209 | } else if (event.key === 'Home' || keyCode === '36') {
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210 |
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211 | this.titles[0].focus();
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212 | handled = true;
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213 | }
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214 | }
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215 |
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216 | if (handled) {
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217 | event.preventDefault();
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218 | }
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219 | }
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220 | }
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221 | }
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222 |
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223 |
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224 |
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225 |
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226 | export namespace AccordionPanel {
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227 | |
228 |
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229 |
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230 | export type Orientation = SplitLayout.Orientation;
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231 |
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232 | |
233 |
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234 |
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235 | export type Alignment = SplitLayout.Alignment;
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236 |
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237 | |
238 |
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239 |
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240 | export type IRenderer = AccordionLayout.IRenderer;
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241 |
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242 | |
243 |
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244 |
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245 | export interface IOptions extends Partial<AccordionLayout.IOptions> {
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246 | |
247 |
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248 |
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249 |
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250 |
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251 |
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252 |
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253 | layout?: AccordionLayout;
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254 | }
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255 |
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256 | |
257 |
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258 |
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259 | export class Renderer extends SplitPanel.Renderer implements IRenderer {
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260 | |
261 |
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262 |
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263 | readonly titleClassName = 'lm-AccordionPanel-title';
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264 |
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265 | |
266 |
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267 |
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268 |
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269 |
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270 |
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271 |
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272 | createCollapseIcon(data: Title<Widget>): HTMLElement {
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273 | return document.createElement('span');
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274 | }
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275 |
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276 | |
277 |
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278 |
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279 |
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280 |
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281 |
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282 |
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283 | createSectionTitle(data: Title<Widget>): HTMLElement {
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284 | const handle = document.createElement('h3');
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285 | handle.setAttribute('role', 'button');
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286 | handle.setAttribute('tabindex', '0');
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287 | handle.id = this.createTitleKey(data);
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288 | handle.className = this.titleClassName;
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289 | handle.title = data.caption;
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290 | for (const aData in data.dataset) {
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291 | handle.dataset[aData] = data.dataset[aData];
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292 | }
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293 |
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294 | const collapser = handle.appendChild(this.createCollapseIcon(data));
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295 | collapser.className = 'lm-AccordionPanel-titleCollapser';
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296 |
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297 | const label = handle.appendChild(document.createElement('span'));
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298 | label.className = 'lm-AccordionPanel-titleLabel';
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299 | label.textContent = data.label;
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300 |
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301 | return handle;
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302 | }
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303 |
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304 | |
305 |
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306 |
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307 |
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308 |
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309 |
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310 |
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311 |
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312 |
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313 |
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314 |
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315 | createTitleKey(data: Title<Widget>): string {
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316 | let key = this._titleKeys.get(data);
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317 | if (key === undefined) {
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318 | key = `title-key-${this._titleID++}`;
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319 | this._titleKeys.set(data, key);
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320 | }
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321 | return key;
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322 | }
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323 |
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324 | private _titleID = 0;
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325 | private _titleKeys = new WeakMap<Title<Widget>, string>();
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326 | }
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327 |
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328 | |
329 |
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330 |
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331 | export const defaultRenderer = new Renderer();
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332 | }
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333 |
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334 | namespace Private {
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335 | |
336 |
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337 |
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338 |
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339 |
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340 |
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341 | export function createLayout(
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342 | options: AccordionPanel.IOptions
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343 | ): AccordionLayout {
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344 | return (
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345 | options.layout ||
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346 | new AccordionLayout({
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347 | renderer: options.renderer || AccordionPanel.defaultRenderer,
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348 | orientation: options.orientation,
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349 | alignment: options.alignment,
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350 | spacing: options.spacing,
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351 | titleSpace: options.titleSpace
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352 | })
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353 | );
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354 | }
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355 | }
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