Dashboard grid React migration #1 (getredash#3722)

* Dashboard grid React migration

* Updated tests

* Fixes comments

* One col layout

* Tests unskipped

* Test fixes

* Test fix

* AutoHeight feature

* Kebab-cased

* Get rid of lazyInjector

* Replace react-grid-layout with patched fork to fix performance issues

* Fix issue with initial layout when page has a scrollbar

* Decrease polling interval (500ms is too slow)

* Rename file to match it's contents

* Added some notes and very minor fixes

* Fix Remove widget button (should be visible only in editing mode); fix widget actions menu

* Fixed missing grid markings

* Enhanced resize handle

* Updated placeholder color

* Render DashboardGrid only when dashboard is loaded

client/app/components/dashboards/AutoHeightController.js

@@ -0,0 +1,110 @@
+import { includes, reduce, some } from 'lodash';
+
+// TODO: Revisit this implementation when migrating widget component to React
+
+const WIDGET_SELECTOR = '[data-widgetid="{0}"]';
+const WIDGET_CONTENT_SELECTOR = [
+  '.widget-header', // header
+  'visualization-renderer', // visualization
+  '.scrollbox .alert', // error state
+  '.spinner-container', // loading state
+  '.tile__bottom-control', // footer
+].join(',');
+const INTERVAL = 200;
+
+export default class AutoHeightController {
+  widgets = {};
+
+  interval = null;
+
+  onHeightChange = null;
+
+  constructor(handler) {
+    this.onHeightChange = handler;
+  }
+
+  update(widgets) {
+    const newWidgetIds = widgets
+      .filter(widget => widget.options.position.autoHeight)
+      .map(widget => widget.id.toString());
+
+    // added
+    newWidgetIds
+      .filter(id => !includes(Object.keys(this.widgets), id))
+      .forEach(this.add);
+
+    // removed
+    Object.keys(this.widgets)
+      .filter(id => !includes(newWidgetIds, id))
+      .forEach(this.remove);
+  }
+
+  add = (id) => {
+    if (this.isEmpty()) {
+      this.start();
+    }
+
+    const selector = WIDGET_SELECTOR.replace('{0}', id);
+    this.widgets[id] = [
+      function getHeight() {
+        const widgetEl = document.querySelector(selector);
+        if (!widgetEl) {
+          return undefined; // safety
+        }
+
+        // get all content elements
+        const els = widgetEl.querySelectorAll(WIDGET_CONTENT_SELECTOR);
+
+        // calculate accumulated height
+        return reduce(els, (acc, el) => {
+          const height = el ? el.getBoundingClientRect().height : 0;
+          return acc + height;
+        }, 0);
+      },
+    ];
+  };
+
+  remove = (id) => {
+    // not actually deleting from this.widgets to prevent case of unwanted re-adding
+    this.widgets[id.toString()] = false;
+
+    if (this.isEmpty()) {
+      this.stop();
+    }
+  };
+
+  exists = id => !!this.widgets[id.toString()];
+
+  isEmpty = () => !some(this.widgets);
+
+  checkHeightChanges = () => {
+    Object.keys(this.widgets).forEach((id) => {
+      const [getHeight, prevHeight] = this.widgets[id];
+      const height = getHeight();
+      if (height && height !== prevHeight) {
+        this.widgets[id][1] = height; // save
+        this.onHeightChange(id, height); // dispatch
+      }
+    });
+  };
+
+  start = () => {
+    this.stop();
+    this.interval = setInterval(this.checkHeightChanges, INTERVAL);
+  };
+
+  stop = () => {
+    clearInterval(this.interval);
+  };
+
+  resume = () => {
+    if (!this.isEmpty()) {
+      this.start();
+    }
+  };
+
+  destroy = () => {
+    this.stop();
+    this.widgets = null;
+  }
+}

client/app/components/dashboards/DashboardGrid.jsx

@@ -0,0 +1,213 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { chain, cloneDeep, find } from 'lodash';
+import { react2angular } from 'react2angular';
+import cx from 'classnames';
+import { Responsive, WidthProvider } from 'react-grid-layout';
+import { DashboardWidget } from '@/components/dashboards/widget';
+import { FiltersType } from '@/components/Filters';
+import cfg from '@/config/dashboard-grid-options';
+import AutoHeightController from './AutoHeightController';
+
+import 'react-grid-layout/css/styles.css';
+import './dashboard-grid.less';
+
+const ResponsiveGridLayout = WidthProvider(Responsive);
+
+const WidgetType = PropTypes.shape({
+  id: PropTypes.number.isRequired,
+  options: PropTypes.shape({
+    position: PropTypes.shape({
+      col: PropTypes.number.isRequired,
+      row: PropTypes.number.isRequired,
+      sizeY: PropTypes.number.isRequired,
+      minSizeY: PropTypes.number.isRequired,
+      maxSizeY: PropTypes.number.isRequired,
+      sizeX: PropTypes.number.isRequired,
+      minSizeX: PropTypes.number.isRequired,
+      maxSizeX: PropTypes.number.isRequired,
+    }).isRequired,
+  }).isRequired,
+});
+
+const SINGLE = 'single-column';
+const MULTI = 'multi-column';
+
+class DashboardGrid extends React.Component {
+  static propTypes = {
+    isEditing: PropTypes.bool.isRequired,
+    dashboard: PropTypes.object.isRequired, // eslint-disable-line react/forbid-prop-types
+    widgets: PropTypes.arrayOf(WidgetType).isRequired,
+    filters: FiltersType,
+    onBreakpointChange: PropTypes.func,
+    onRemoveWidget: PropTypes.func,
+    onLayoutChange: PropTypes.func,
+  };
+
+  static defaultProps = {
+    filters: [],
+    onRemoveWidget: () => {},
+    onLayoutChange: () => {},
+    onBreakpointChange: () => {},
+  };
+
+  static normalizeFrom(widget) {
+    const { id, options: { position: pos } } = widget;
+
+    return {
+      i: id.toString(),
+      x: pos.col,
+      y: pos.row,
+      w: pos.sizeX,
+      h: pos.sizeY,
+      minW: pos.minSizeX,
+      maxW: pos.maxSizeX,
+      minH: pos.minSizeY,
+      maxH: pos.maxSizeY,
+    };
+  }
+
+  mode = null;
+
+  autoHeightCtrl = null;
+
+  constructor(props) {
+    super(props);
+
+    this.state = {
+      layouts: {},
+      disableAnimations: true,
+    };
+
+    // init AutoHeightController
+    this.autoHeightCtrl = new AutoHeightController(this.onWidgetHeightUpdated);
+    this.autoHeightCtrl.update(this.props.widgets);
+  }
+
+  componentDidMount() {
+    this.onBreakpointChange(document.body.offsetWidth <= cfg.mobileBreakPoint ? SINGLE : MULTI);
+    // Work-around to disable initial animation on widgets; `measureBeforeMount` doesn't work properly:
+    // it disables animation, but it cannot detect scrollbars.
+    setTimeout(() => {
+      this.setState({ disableAnimations: false });
+    }, 50);
+  }
+
+  componentDidUpdate() {
+    // update, in case widgets added or removed
+    this.autoHeightCtrl.update(this.props.widgets);
+  }
+
+  componentWillUnmount() {
+    this.autoHeightCtrl.destroy();
+  }
+
+  onLayoutChange = (_, layouts) => {
+    // workaround for when dashboard starts at single mode and then multi is empty or carries single col data
+    // fixes test dashboard_spec['shows widgets with full width']
+    // TODO: open react-grid-layout issue
+    if (layouts[MULTI]) {
+      this.setState({ layouts });
+    }
+
+    // workaround for https://github.com/STRML/react-grid-layout/issues/889
+    // remove next line when fix lands
+    this.mode = document.body.offsetWidth <= cfg.mobileBreakPoint ? SINGLE : MULTI;
+    // end workaround
+
+    // don't save single column mode layout
+    if (this.mode === SINGLE) {
+      return;
+    }
+
+    const normalized = chain(layouts[MULTI])
+      .keyBy('i')
+      .mapValues(this.normalizeTo)
+      .value();
+
+    this.props.onLayoutChange(normalized);
+  };
+
+  onBreakpointChange = (mode) => {
+    this.mode = mode;
+    this.props.onBreakpointChange(mode === SINGLE);
+  };
+
+  // height updated by auto-height
+  onWidgetHeightUpdated = (widgetId, newHeight) => {
+    this.setState(({ layouts }) => {
+      const layout = cloneDeep(layouts[MULTI]); // must clone to allow react-grid-layout to compare prev/next state
+      const item = find(layout, { i: widgetId.toString() });
+      if (item) {
+        // update widget height
+        item.h = Math.ceil((newHeight + cfg.margins) / cfg.rowHeight);
+      }
+
+      return { layouts: { [MULTI]: layout } };
+    });
+  };
+
+  // height updated by manual resize
+  onWidgetResize = (layout, oldItem, newItem) => {
+    if (oldItem.h !== newItem.h) {
+      this.autoHeightCtrl.remove(Number(newItem.i));
+    }
+
+    this.autoHeightCtrl.resume();
+  };
+
+  normalizeTo = layout => ({
+    col: layout.x,
+    row: layout.y,
+    sizeX: layout.w,
+    sizeY: layout.h,
+    autoHeight: this.autoHeightCtrl.exists(layout.i),
+  });
+
+  render() {
+    const className = cx('dashboard-wrapper', this.props.isEditing ? 'editing-mode' : 'preview-mode');
+    const { onRemoveWidget, dashboard, widgets } = this.props;
+
+    return (
+      <div className={className}>
+        <ResponsiveGridLayout
+          className={cx('layout', { 'disable-animations': this.state.disableAnimations })}
+          cols={{ [MULTI]: cfg.columns, [SINGLE]: 1 }}
+          rowHeight={cfg.rowHeight - cfg.margins}
+          margin={[cfg.margins, cfg.margins]}
+          isDraggable={this.props.isEditing}
+          isResizable={this.props.isEditing}
+          onResizeStart={this.autoHeightCtrl.stop}
+          onResizeStop={this.onWidgetResize}
+          layouts={this.state.layouts}
+          onLayoutChange={this.onLayoutChange}
+          onBreakpointChange={this.onBreakpointChange}
+          breakpoints={{ [MULTI]: cfg.mobileBreakPoint, [SINGLE]: 0 }}
+        >
+          {widgets.map(widget => (
+            <div
+              key={widget.id}
+              data-grid={DashboardGrid.normalizeFrom(widget)}
+              data-widgetid={widget.id}
+              data-test={`WidgetId${widget.id}`}
+              className={cx('dashboard-widget-wrapper', { 'widget-auto-height-enabled': this.autoHeightCtrl.exists(widget.id) })}
+            >
+              <DashboardWidget
+                widget={widget}
+                dashboard={dashboard}
+                filters={this.props.filters}
+                deleted={() => onRemoveWidget(widget.id)}
+              />
+            </div>
+          ))}
+        </ResponsiveGridLayout>
+      </div>
+    );
+  }
+}
+
+export default function init(ngModule) {
+  ngModule.component('dashboardGrid', react2angular(DashboardGrid));
+}
+
+init.init = true;

client/app/components/dashboards/dashboard-grid.less

@@ -0,0 +1,7 @@
+.react-grid-layout {
+  &.disable-animations {
+    & > .react-grid-item {
+      transition: none !important;
+    }
+  }
+}