Add react component for Timeline visualization

CHANGELOG.md

@@ -583,3 +583,7 @@ to rebuild them every time the envelope list is updated. Use this instead of `<W
 [4.1.1]: https://github.com/cucumber/cucumber-react/compare/v4.0.0...v4.1.1
 [4.0.0]: https://github.com/cucumber/cucumber-react/compare/v3.3.0...v4.0.0
 [3.3.0]: https://github.com/cucumber/cucumber-react/compare/v3.2.0...v3.3.0
+
+## [Unreleased]
+### Added
+- Added `<Timeline/>` component showing scenario execution over time grouped by worker ([#126](https://github.com/cucumber/react-components/issues/126))

src/components/app/Report.module.scss

@@ -1,3 +1,5 @@
+@use '../../styles/theming';
+
 .layout {
   > section:not(:last-child) {
     margin-bottom: 1.5em;
@@ -8,3 +10,37 @@
   font-size: 1.25em;
   margin: 1em 0;
 }
+
+.tabList {
+  display: flex;
+  gap: 0.25em;
+  border-bottom: 1px solid theming.$panelAccentColor;
+  margin-bottom: 1em;
+}
+
+.tab {
+  padding: 0.5em 1em;
+  border-bottom: 2px solid transparent;
+  color: theming.$panelTextColor;
+  cursor: pointer;
+  outline: none;
+
+  &[data-hovered] {
+    background-color: theming.$panelBackgroundColor;
+  }
+
+  &[data-selected] {
+    border-bottom-color: theming.$anchorColor;
+    color: theming.$anchorColor;
+    font-weight: 600;
+  }
+
+  &[data-focus-visible] {
+    outline: 2px solid theming.$anchorColor;
+    outline-offset: 2px;
+  }
+}
+
+.tabPanel {
+  outline: none;
+}

src/components/app/Report.tsx

@@ -1,10 +1,12 @@
 import type { FC } from 'react'
+import { Tab, TabList, TabPanel, TabPanels, Tabs } from 'react-aria-components'
 
 import { ExecutionSummary } from './ExecutionSummary.js'
 import { FilteredDocuments } from './FilteredDocuments.js'
 import styles from './Report.module.scss'
 import { SearchBar } from './SearchBar.js'
 import { TestRunHooks } from './TestRunHooks.js'
+import { Timeline } from './Timeline.js'
 
 export const Report: FC = () => {
   return (
@@ -14,8 +16,24 @@ export const Report: FC = () => {
         <SearchBar />
       </section>
       <section>
-        <h2 className={styles.heading}>Scenarios</h2>
-        <FilteredDocuments />
+        <Tabs className={styles.tabs}>
+          <TabList aria-label="Report views" className={styles.tabList}>
+            <Tab id="scenarios" className={styles.tab}>
+              Scenarios
+            </Tab>
+            <Tab id="timeline" className={styles.tab}>
+              Timeline
+            </Tab>
+          </TabList>
+          <TabPanels>
+            <TabPanel id="scenarios" className={styles.tabPanel}>
+              <FilteredDocuments />
+            </TabPanel>
+            <TabPanel id="timeline" className={styles.tabPanel}>
+              <Timeline />
+            </TabPanel>
+          </TabPanels>
+        </Tabs>
       </section>
       <section>
         <h2 className={styles.heading}>Hooks</h2>

src/components/app/Timeline.module.scss

@@ -0,0 +1,227 @@
+@use '../../styles/statuses';
+@use '../../styles/theming';
+@use 'sass:color';
+
+.empty {
+  font-style: italic;
+}
+
+.timelineWrapper {
+  display: flex;
+  flex-direction: column;
+  padding: 1px;
+}
+
+.timelineRow {
+  width: 100%;
+  display: grid;
+  grid-template-columns: 1fr minmax(0, 4fr);
+  gap: 1px;
+  border: 1px solid theming.$panelAccentColor;
+  border-top: none;
+}
+
+.timelineRow:first-child {
+  border-top: 1px solid theming.$panelAccentColor;
+}
+
+.cell {
+  height: 3em;
+}
+
+.cell:first-child {
+  border-right: 1px solid theming.$panelAccentColor;
+}
+
+.leftCell {
+  display: flex;
+  align-items: center;
+  padding-left: 0.5em;
+  font-family: inherit;
+}
+
+// Timeline Bar Styles
+
+.timelineBarWrapper {
+  display: flex;
+  overflow: hidden;
+  align-items: center;
+  position: sticky; // Allows setting timelineBar position: absolute
+}
+
+.timelineBar {
+  height: 80%;
+  border-radius: 0.333em;
+  border: none;
+  padding: 0; 
+  box-sizing: border-box;
+  flex: none;
+  position: absolute;
+}
+
+@each $name, $color in statuses.$statusColors {
+  .timelineBar[data-status='#{$name}'] {
+    background-color: color.adjust($color, $alpha: -0.666);
+    border-color: $color;
+
+  &:hover {
+    outline: 1px solid $color;
+  }
+
+  &.selected {
+    outline: 1px solid $color
+  }
+}
+}
+
+// Tooltip Styles
+
+.icon {
+  padding-top: 0.35em;
+  padding-left: 0.5em;
+  padding-right: 0.5em;
+}
+
+// Tooltip card
+:global(.react-aria-Tooltip) {
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+  background-color: theming.$panelBackgroundColor;
+  color: theming.$panelTextColor;
+  border: 1px solid theming.$panelAccentColor;
+  border-radius: 0.25em;
+  padding: 0.4em 0.6em;
+  font-size: inherit;
+  font-family: inherit;
+  align-items: center;
+  gap: 0.4em;
+  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
+  max-width: 20em;
+  margin-bottom: 0.7em;
+}
+
+.tooltipBtn {
+  border: none;
+  background: none;
+}
+
+// Arrow styling
+:global(.react-aria-Tooltip) svg {
+  fill: theming.$exampleNumberColor;
+  stroke: theming.$panelAccentColor;
+  stroke-width: 1px;
+}
+
+// Axis Styles
+
+.axisUnit {
+  font-size: 0.65em;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+  color: theming.$exampleNumberColor;
+  opacity: 0.9;
+}
+
+.axisRuler {
+  position: relative;
+  overflow: hidden;
+  cursor: grab;
+  user-select: none;
+  border: none;
+  background-color: inherit;
+  padding: 0;
+  margin: 0;
+}
+
+.axisRuler:active {
+  cursor: grabbing;
+}
+
+.minorTick {
+  position: absolute;
+  bottom: 0;
+  width: 2px;
+  height: 30%;
+  background-color: theming.$panelAccentColor;
+  pointer-events: none;
+}
+
+.majorTick {
+  position: absolute;
+  bottom: 0;
+  width: 2px;
+  height: 55%;
+  background-color: theming.$exampleNumberColor;
+  pointer-events: none;
+}
+
+.tickLabel {
+  position: absolute;
+  bottom: 100%;
+  left: 50%;
+  transform: translateX(-50%);
+  font-size: 0.6em;
+  line-height: 1.5;
+  white-space: nowrap;
+  color: theming.$panelTextColor;
+  opacity: 0.75;
+  pointer-events: none;
+}
+
+
+// Timeline Bar Detail Styles
+
+.detail {
+  position: relative;
+  padding: 1em;
+  background-color: theming.$panelBackgroundColor;
+  color: theming.$panelTextColor;
+  border: 1px solid theming.$panelAccentColor;
+  border-radius: 0.25em;
+}
+
+.detailClose {
+  position: absolute;
+  top: 0.5em;
+  right: 0.5em;
+  padding: 0.25em;
+  background: none;
+  border: none;
+  cursor: pointer;
+  color: inherit;
+}
+
+.detailTitle {
+  display: flex;
+  align-items: center;
+  gap: 0.4em;
+  margin: 0 0 0.25em;
+  font-size: 1.1em;
+
+  svg {
+    height: 1em;
+  }
+}
+
+.detailFeature {
+  margin: 0 0 0.5em;
+  opacity: 0.75;
+}
+
+.detailMeta {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 1em;
+  margin: 0.75em 0 0;
+
+  dt {
+    font-size: 0.75em;
+    text-transform: uppercase;
+    opacity: 0.75;
+  }
+
+  dd {
+    margin: 0;
+  }
+}