Convert panel container to JS: Decaffeinate

src/panel-container.js

@@ -0,0 +1,92 @@
+let PanelContainer;
+const {Emitter, CompositeDisposable} = require('event-kit');
+
+module.exports =
+PanelContainer = class PanelContainer {
+  constructor({location}={}) {
+    this.location = location;
+    this.emitter = new Emitter;
+    this.subscriptions = new CompositeDisposable;
+    this.panels = [];
+  }
+
+  destroy() {
+    for (let panel of this.getPanels()) { panel.destroy(); }
+    this.subscriptions.dispose();
+    this.emitter.emit('did-destroy', this);
+    return this.emitter.dispose();
+  }
+
+  /*
+  Section: Event Subscription
+  */
+
+  onDidAddPanel(callback) {
+    return this.emitter.on('did-add-panel', callback);
+  }
+
+  onDidRemovePanel(callback) {
+    return this.emitter.on('did-remove-panel', callback);
+  }
+
+  onDidDestroy(callback) {
+    return this.emitter.on('did-destroy', callback);
+  }
+
+  /*
+  Section: Panels
+  */
+
+  getLocation() { return this.location; }
+
+  isModal() { return this.location === 'modal'; }
+
+  getPanels() { return this.panels.slice(); }
+
+  addPanel(panel) {
+    this.subscriptions.add(panel.onDidDestroy(this.panelDestroyed.bind(this)));
+
+    const index = this.getPanelIndex(panel);
+    if (index === this.panels.length) {
+      this.panels.push(panel);
+    } else {
+      this.panels.splice(index, 0, panel);
+    }
+
+    this.emitter.emit('did-add-panel', {panel, index});
+    return panel;
+  }
+
+  panelForItem(item) {
+    for (let panel of this.panels) {
+      if (panel.getItem() === item) { return panel; }
+    }
+    return null;
+  }
+
+  panelDestroyed(panel) {
+    const index = this.panels.indexOf(panel);
+    if (index > -1) {
+      this.panels.splice(index, 1);
+      return this.emitter.emit('did-remove-panel', {panel, index});
+    }
+  }
+
+  getPanelIndex(panel) {
+    let i, p;
+    const priority = panel.getPriority();
+    if (['bottom', 'right'].includes(this.location)) {
+      for (i = this.panels.length - 1; i >= 0; i--) {
+        p = this.panels[i];
+        if (priority < p.getPriority()) { return i + 1; }
+      }
+      return 0;
+    } else {
+      for (i = 0; i < this.panels.length; i++) {
+        p = this.panels[i];
+        if (priority < p.getPriority()) { return i; }
+      }
+      return this.panels.length;
+    }
+  }
+};