discourse-data-explorer/assets/javascripts/discourse/components/explorer-container.js.es6

import { observes } from "ember-addons/ember-computed-decorators";

export default Ember.Component.extend({
  @observes("hideSchema")
  _onHideSchema() {
    this.appEvents.trigger("ace:resize");
  },

  @observes("everEditing")
  _onInsertEditor() {
    Ember.run.schedule("afterRender", this, () => this._bindControls());
  },

  _bindControls() {
    if (this._state !== "inDOM") {
      return;
    }
    const $editPane = this.$().find(".query-editor");
    if (!$editPane.length) {
      return;
    }
    const oldGrippie = this.get("grippie");
    if (oldGrippie) {
      oldGrippie.off("mousedown mousemove mouseup");
      $editPane.off("mousemove mouseup");
    }

    const $grippie = $editPane.find(".grippie");
    const $targets = $editPane.find(".ace-wrapper,.grippie-target");
    const $body = $("body");
    const self = this;

    this.set("grippie", $grippie);

    const mousemove = function(e) {
      const diff = self.get("startY") - e.screenY;
      const newHeight = self.get("startSize") - diff;
      $targets.height(newHeight);
      self.appEvents.trigger("ace:resize");
    };

    let mouseup;
    mouseup = function(e) {
      mousemove(e);
      $body.off("mousemove", mousemove);
      $body.off("mouseup", mouseup);
      self.set("startY", null);
      self.set("startSize", null);
    };

    $grippie.on("mousedown", function(e) {
      self.set("startY", e.screenY);
      self.set("startSize", $targets.height());

      $body.on("mousemove", mousemove);
      $body.on("mouseup", mouseup);
      e.preventDefault();
    });
  },

  didInsertElement() {
    this._super();
    this._bindControls();
  },

  willDestroyElement() {
    this._super();
    if (this.get("everEditing")) {
      this.get("grippie").off("mousedown");
      this.set("grippie", null);
    }
  }
});