Refactor charts header to the panel wrapper

- Reduce duplication by moving the header to the panel header instead of
each chart.
- Ensure widget contextual menu is present in all charts, instead of
only the time series chart.
- Clean some css so the heading keeps the same style when embedded.

app/assets/javascripts/monitoring/components/charts/column.vue

@@ -90,11 +90,7 @@ export default {
 };
 </script>
 <template>
-  <div v-gl-resize-observer-directive="onResize" class="prometheus-graph">
-    <div class="prometheus-graph-header">
-      <h5 ref="graphTitle" class="prometheus-graph-title">{{ graphData.title }}</h5>
-      <div ref="graphWidgets" class="prometheus-graph-widgets"><slot></slot></div>
-    </div>
+  <div v-gl-resize-observer-directive="onResize">
     <gl-column-chart
       ref="columnChart"
       v-bind="$attrs"

app/assets/javascripts/monitoring/components/charts/empty_chart.vue

@@ -27,10 +27,7 @@ export default {
 };
 </script>
 <template>
-  <div class="prometheus-graph d-flex flex-column justify-content-center">
-    <div class="prometheus-graph-header">
-      <h5 ref="graphTitle" class="prometheus-graph-title">{{ graphTitle }}</h5>
-    </div>
+  <div class="d-flex flex-column justify-content-center">
     <div
       class="prepend-top-8 svg-w-100 d-flex align-items-center"
       :style="svgContainerStyle"

app/assets/javascripts/monitoring/components/charts/heatmap.vue

@@ -2,13 +2,11 @@
 import { GlResizeObserverDirective } from '@gitlab/ui';
 import { GlHeatmap } from '@gitlab/ui/dist/charts';
 import dateformat from 'dateformat';
-import PrometheusHeader from '../shared/prometheus_header.vue';
 import { graphDataValidatorForValues } from '../../utils';
 
 export default {
   components: {
     GlHeatmap,
-    PrometheusHeader,
   },
   directives: {
     GlResizeObserverDirective,
@@ -65,8 +63,7 @@ export default {
 };
 </script>
 <template>
-  <div v-gl-resize-observer-directive="onResize" class="prometheus-graph col-12 col-lg-6">
-    <prometheus-header :graph-title="graphData.title" />
+  <div v-gl-resize-observer-directive="onResize" class="col-12 col-lg-6">
     <gl-heatmap
       ref="heatmapChart"
       v-bind="$attrs"

app/assets/javascripts/monitoring/components/charts/single_stat.vue

@@ -42,10 +42,7 @@ export default {
 };
 </script>
 <template>
-  <div class="prometheus-graph">
-    <div class="prometheus-graph-header">
-      <h5 ref="graphTitle" class="prometheus-graph-title">{{ graphTitle }}</h5>
-    </div>
+  <div>
     <gl-single-stat :value="statValue" :title="graphTitle" variant="success" />
   </div>
 </template>

app/assets/javascripts/monitoring/components/charts/stacked_column.vue

@@ -81,11 +81,7 @@ export default {
 };
 </script>
 <template>
-  <div v-gl-resize-observer-directive="onResize" class="prometheus-graph">
-    <div class="prometheus-graph-header">
-      <h5 ref="graphTitle" class="prometheus-graph-title">{{ graphData.title }}</h5>
-      <div ref="graphWidgets" class="prometheus-graph-widgets"><slot></slot></div>
-    </div>
+  <div v-gl-resize-observer-directive="onResize">
     <gl-stacked-column-chart
       ref="chart"
       v-bind="$attrs"

app/assets/javascripts/monitoring/components/charts/time_series.vue

@@ -112,7 +112,6 @@ export default {
         isDeployment: false,
         sha: '',
       },
-      showTitleTooltip: false,
       width: 0,
       height: chartHeight,
       svgs: {},
@@ -285,12 +284,6 @@ export default {
       return `${this.graphData.y_label}`;
     },
   },
-  mounted() {
-    const graphTitleEl = this.$refs.graphTitle;
-    if (graphTitleEl && graphTitleEl.scrollWidth > graphTitleEl.offsetWidth) {
-      this.showTitleTooltip = true;
-    }
-  },
   created() {
     this.setSvg('rocket');
     this.setSvg('scroll-handle');
@@ -387,24 +380,7 @@ export default {
 </script>
 
 <template>
-  <div v-gl-resize-observer-directive="onResize" class="prometheus-graph">
-    <div class="prometheus-graph-header">
-      <h5
-        ref="graphTitle"
-        class="prometheus-graph-title js-graph-title text-truncate append-right-8"
-      >
-        {{ graphData.title }}
-      </h5>
-      <gl-tooltip :target="() => $refs.graphTitle" :disabled="!showTitleTooltip">
-        {{ graphData.title }}
-      </gl-tooltip>
-      <div
-        class="prometheus-graph-widgets js-graph-widgets flex-fill"
-        data-qa-selector="prometheus_graph_widgets"
-      >
-        <slot></slot>
-      </div>
-    </div>
+  <div v-gl-resize-observer-directive="onResize">
     <component
       :is="glChartComponent"
       ref="chart"

app/assets/javascripts/monitoring/components/panel_type.vue

@@ -3,10 +3,12 @@ import { mapState } from 'vuex';
 import { pickBy } from 'lodash';
 import invalidUrl from '~/lib/utils/invalid_url';
 import {
+  GlResizeObserverDirective,
   GlDropdown,
   GlDropdownItem,
   GlModal,
   GlModalDirective,
+  GlTooltip,
   GlTooltipDirective,
 } from '@gitlab/ui';
 import { __ } from '~/locale';
@@ -29,11 +31,13 @@ export default {
     MonitorStackedColumnChart,
     MonitorEmptyChart,
     Icon,
+    GlTooltip,
     GlDropdown,
     GlDropdownItem,
     GlModal,
   },
   directives: {
+    GlResizeObserver: GlResizeObserverDirective,
     GlModal: GlModalDirective,
     GlTooltip: GlTooltipDirective,
     TrackEvent: TrackEventDirective,
@@ -61,11 +65,15 @@ export default {
   },
   data() {
     return {
+      showTitleTooltip: false,
       zoomedTimeRange: null,
     };
   },
   computed: {
     ...mapState('monitoringDashboard', ['deploymentData', 'projectPath', 'logsPath', 'timeRange']),
+    title() {
+      return this.graphData.title || '';
+    },
     alertWidgetAvailable() {
       return IS_EE && this.prometheusAlertsAvailable && this.alertsEndpoint && this.graphData;
     },
@@ -97,12 +105,24 @@ export default {
       const data = new Blob([this.csvText], { type: 'text/plain' });
       return window.URL.createObjectURL(data);
     },
-    monitorChartComponent() {
+    timeChartComponent() {
       if (this.isPanelType('anomaly-chart')) {
         return MonitorAnomalyChart;
       }
       return MonitorTimeSeriesChart;
     },
+    isContextualMenuShown() {
+      return (
+        this.graphDataHasMetrics &&
+        !this.isPanelType('single-stat') &&
+        !this.isPanelType('heatmap') &&
+        !this.isPanelType('column') &&
+        !this.isPanelType('stacked-column')
+      );
+    },
+  },
+  mounted() {
+    this.refreshTitleTooltip();
   },
   methods: {
     getGraphAlerts(queries) {
@@ -119,9 +139,18 @@ export default {
     showToast() {
       this.$toast.show(__('Link copied'));
     },
+    refreshTitleTooltip() {
+      const { graphTitle } = this.$refs;
+      this.showTitleTooltip =
+        Boolean(graphTitle) && graphTitle.scrollWidth > graphTitle.offsetWidth;
+    },
+
     downloadCSVOptions,
     generateLinkToChartOptions,
 
+    onResize() {
+      this.refreshTitleTooltip();
+    },
     onDatazoom({ start, end }) {
       this.zoomedTimeRange = { start, end };
     },
@@ -129,32 +158,21 @@ export default {
 };
 </script>
 <template>
-  <monitor-single-stat-chart
-    v-if="isPanelType('single-stat') && graphDataHasMetrics"
-    :graph-data="graphData"
-  />
-  <monitor-heatmap-chart
-    v-else-if="isPanelType('heatmap') && graphDataHasMetrics"
-    :graph-data="graphData"
-  />
-  <monitor-column-chart
-    v-else-if="isPanelType('column') && graphDataHasMetrics"
-    :graph-data="graphData"
-  />
-  <monitor-stacked-column-chart
-    v-else-if="isPanelType('stacked-column') && graphDataHasMetrics"
-    :graph-data="graphData"
-  />
-  <component
-    :is="monitorChartComponent"
-    v-else-if="graphDataHasMetrics"
-    ref="timeChart"
-    :graph-data="graphData"
-    :deployment-data="deploymentData"
-    :project-path="projectPath"
-    :thresholds="getGraphAlertValues(graphData.metrics)"
-    :group-id="groupId"
-    @datazoom="onDatazoom"
+  <div v-gl-resize-observer="onResize" class="prometheus-graph">
+    <div class="prometheus-graph-header">
+      <h5
+        ref="graphTitle"
+        class="prometheus-graph-title gl-font-size-large font-weight-bold text-truncate append-right-8"
+      >
+        {{ title }}
+      </h5>
+      <gl-tooltip :target="() => $refs.graphTitle" :disabled="!showTitleTooltip">
+        {{ title }}
+      </gl-tooltip>
+      <div
+        v-if="isContextualMenuShown"
+        class="prometheus-graph-widgets js-graph-widgets flex-fill"
+        data-qa-selector="prometheus_graph_widgets"
       >
         <div class="d-flex align-items-center">
           <alert-widget
@@ -170,8 +188,8 @@ export default {
             class="ml-auto mx-3"
             toggle-class="btn btn-transparent border-0"
             data-qa-selector="prometheus_widgets_dropdown"
-        :right="true"
-        :no-caret="true"
+            right
+            no-caret
             :title="__('More actions')"
           >
             <template slot="button-content">
@@ -187,7 +205,9 @@ export default {
             </gl-dropdown-item>
 
             <gl-dropdown-item
-          v-track-event="downloadCSVOptions(graphData.title)"
+              v-if="csvText"
+              ref="downloadCsvLink"
+              v-track-event="downloadCSVOptions(title)"
               :href="downloadCsv"
               download="chart_metrics.csv"
             >
@@ -211,6 +231,36 @@ export default {
             </gl-dropdown-item>
           </gl-dropdown>
         </div>
-  </component>
-  <monitor-empty-chart v-else :graph-title="graphData.title" />
+      </div>
+    </div>
+
+    <monitor-single-stat-chart
+      v-if="isPanelType('single-stat') && graphDataHasMetrics"
+      :graph-data="graphData"
+    />
+    <monitor-heatmap-chart
+      v-else-if="isPanelType('heatmap') && graphDataHasMetrics"
+      :graph-data="graphData"
+    />
+    <monitor-column-chart
+      v-else-if="isPanelType('column') && graphDataHasMetrics"
+      :graph-data="graphData"
+    />
+    <monitor-stacked-column-chart
+      v-else-if="isPanelType('stacked-column') && graphDataHasMetrics"
+      :graph-data="graphData"
+    />
+    <component
+      :is="timeChartComponent"
+      v-else-if="graphDataHasMetrics"
+      ref="timeChart"
+      :graph-data="graphData"
+      :deployment-data="deploymentData"
+      :project-path="projectPath"
+      :thresholds="getGraphAlertValues(graphData.metrics)"
+      :group-id="groupId"
+      @datazoom="onDatazoom"
+    />
+    <monitor-empty-chart v-else :graph-title="title" v-bind="$attrs" v-on="$listeners" />
+  </div>
 </template>

app/assets/javascripts/monitoring/components/shared/prometheus_header.vue

-<script>
-export default {
-  props: {
-    graphTitle: {
-      type: String,
-      required: true,
-    },
-  },
-};
-</script>
-<template>
-  <div class="prometheus-graph-header">
-    <h5 ref="title" class="prometheus-graph-title">{{ graphTitle }}</h5>
-  </div>
-</template>

app/assets/stylesheets/pages/prometheus.scss

@@ -91,10 +91,6 @@
   margin-bottom: $gl-padding-8;
 }
 
-.prometheus-graph-title {
-  font-size: $gl-font-size-large;
-}
-
 .alert-current-setting {
   max-width: 240px;
 }

qa/qa/page/project/operations/metrics.rb

@@ -12,11 +12,8 @@ module QA
             element :prometheus_graphs
           end
 
-          view 'app/assets/javascripts/monitoring/components/charts/time_series.vue' do
-            element :prometheus_graph_widgets
-          end
-
           view 'app/assets/javascripts/monitoring/components/panel_type.vue' do
+            element :prometheus_graph_widgets
             element :prometheus_widgets_dropdown
             element :alert_widget_menu_item
           end

spec/frontend/monitoring/components/charts/anomaly_spec.js

@@ -11,7 +11,6 @@ import {
 } from '../../mock_data';
 import MonitorTimeSeriesChart from '~/monitoring/components/charts/time_series.vue';
 
-const mockWidgets = 'mockWidgets';
 const mockProjectPath = `${TEST_HOST}${mockProjectDir}`;
 
 jest.mock('~/lib/utils/icon_utils'); // mock getSvgIconPathContent
@@ -35,9 +34,6 @@ describe('Anomaly chart component', () => {
   const setupAnomalyChart = props => {
     wrapper = shallowMount(Anomaly, {
       propsData: { ...props },
-      slots: {
-        default: mockWidgets,
-      },
     });
   };
   const findTimeSeries = () => wrapper.find(MonitorTimeSeriesChart);

spec/frontend/monitoring/components/charts/empty_chart_spec.js

@@ -13,14 +13,6 @@ describe('Empty Chart component', () => {
     });
   });
 
-  afterEach(() => {
-    emptyChart.destroy();
-  });
-
-  it('render the chart title', () => {
-    expect(emptyChart.find({ ref: 'graphTitle' }).text()).toBe(graphTitle);
-  });
-
   describe('Computed props', () => {
     it('sets the height for the svg container', () => {
       expect(emptyChart.vm.svgContainerStyle.height).toBe('300px');

spec/frontend/monitoring/components/charts/time_series_spec.js

@@ -16,8 +16,6 @@ import {
 } from '../../mock_data';
 import * as iconUtils from '~/lib/utils/icon_utils';
 
-const mockWidgets = 'mockWidgets';
-
 const mockSvgPathContent = 'mockSvgPathContent';
 
 jest.mock('lodash/throttle', () =>
@@ -65,9 +63,6 @@ describe('Time series component', () => {
           deploymentData: store.state.monitoringDashboard.deploymentData,
           projectPath: `${mockHost}${mockProjectDir}`,
         },
-        slots: {
-          default: mockWidgets,
-        },
         store,
       });
   });
@@ -82,14 +77,6 @@ describe('Time series component', () => {
       timeSeriesChart.vm.$nextTick(done);
     });
 
-    it('renders chart title', () => {
-      expect(timeSeriesChart.find('.js-graph-title').text()).toBe(mockGraphData.title);
-    });
-
-    it('contains graph widgets from slot', () => {
-      expect(timeSeriesChart.find('.js-graph-widgets').text()).toBe(mockWidgets);
-    });
-
     it('allows user to override max value label text using prop', () => {
       timeSeriesChart.setProps({ legendMaxText: 'legendMaxText' });
 

spec/frontend/monitoring/components/panel_type_spec.js

@@ -74,6 +74,18 @@ describe('Panel Type component', () => {
         glEmptyChart = wrapper.find(EmptyChart);
       });
 
+      it('renders the chart title', () => {
+        expect(wrapper.find({ ref: 'graphTitle' }).text()).toBe(graphDataNoResult.title);
+      });
+
+      it('renders the no download csv link', () => {
+        expect(wrapper.find({ ref: 'downloadCsvLink' }).exists()).toBe(false);
+      });
+
+      it('does not contain graph widgets', () => {
+        expect(wrapper.find('.js-graph-widgets').exists()).toBe(false);
+      });
+
       it('is a Vue instance', () => {
         expect(glEmptyChart.isVueInstance()).toBe(true);
       });
@@ -97,6 +109,15 @@ describe('Panel Type component', () => {
       wrapper.destroy();
     });
 
+    it('renders the chart title', () => {
+      expect(wrapper.find({ ref: 'graphTitle' }).text()).toBe(graphDataPrometheusQueryRange.title);
+    });
+
+    it('contains graph widgets', () => {
+      expect(wrapper.find('.js-graph-widgets').exists()).toBe(true);
+      expect(wrapper.find({ ref: 'downloadCsvLink' }).exists()).toBe(true);
+    });
+
     it('sets no clipboard copy link on dropdown by default', () => {
       expect(findCopyLink().exists()).toBe(false);
     });

spec/frontend/monitoring/shared/prometheus_header_spec.js

-import { shallowMount } from '@vue/test-utils';
-import PrometheusHeader from '~/monitoring/components/shared/prometheus_header.vue';
-
-describe('Prometheus Header component', () => {
-  let prometheusHeader;
-
-  beforeEach(() => {
-    prometheusHeader = shallowMount(PrometheusHeader, {
-      propsData: {
-        graphTitle: 'graph header',
-      },
-    });
-  });
-
-  afterEach(() => {
-    prometheusHeader.destroy();
-  });
-
-  describe('Prometheus header component', () => {
-    it('should show a title', () => {
-      const title = prometheusHeader.find({ ref: 'title' }).text();
-
-      expect(title).toBe('graph header');
-    });
-  });
-});