feat(chart): refine viewport interaction and rendering

src/components/waveformChartCases/viewportLifecycle.test.ts

@@ -0,0 +1,132 @@
+import { flushPromises } from '@vue/test-utils'
+import { describe, expect, it, vi } from 'vitest'
+
+import { gridSeries, mountSizedChart } from '../../test/waveformChart'
+import WaveformChartView from '../WaveformChartView.vue'
+
+describe('WaveformChart viewport lifecycle', () => {
+  it('cleans an active shared gesture when its track is removed', async () => {
+    const wrapper = await mountSizedChart(gridSeries(2), {
+      displayMode: 'separated',
+      grid: { rowCount: 2, columnCount: 1 },
+    })
+    const overlay = wrapper.get('.waveform-chart__overlay--shared')
+    const width = Number(overlay.attributes('width'))
+    const height = Number(overlay.attributes('height'))
+    const releasePointerCapture = vi.fn()
+    Object.defineProperty(overlay.element, 'getBoundingClientRect', {
+      value: () => ({ left: 0, top: 0, width, height }),
+    })
+    Object.defineProperty(overlay.element, 'setPointerCapture', { value: vi.fn() })
+    Object.defineProperty(overlay.element, 'releasePointerCapture', {
+      value: releasePointerCapture,
+    })
+
+    const dispatchPointer = (type: string, pointerId: number, clientY: number) => {
+      const event = new MouseEvent(type, {
+        button: 0,
+        clientX: width / 2,
+        clientY,
+        bubbles: true,
+      })
+      Object.defineProperty(event, 'pointerId', { value: pointerId })
+      overlay.element.dispatchEvent(event)
+    }
+
+    dispatchPointer('pointerdown', 41, height * 0.75)
+    await flushPromises()
+    expect(wrapper.find('.waveform-chart__zoom-selection').exists()).toBe(true)
+
+    await wrapper.setProps({ data: gridSeries(1) })
+    await flushPromises()
+    dispatchPointer('pointerup', 41, height * 0.75)
+    await flushPromises()
+
+    expect(releasePointerCapture).toHaveBeenCalledWith(41)
+    expect(wrapper.find('.waveform-chart__zoom-selection').exists()).toBe(false)
+
+    dispatchPointer('pointerdown', 42, height / 2)
+    dispatchPointer('pointermove', 42, height / 2 + 20)
+    await flushPromises()
+    expect(wrapper.find('.waveform-chart__zoom-selection').exists()).toBe(true)
+  })
+
+  it('cleans an active gesture when its overlay leaves the DOM', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 0, y: 0 },
+          { x: 1, y: 1 },
+        ],
+      },
+      { displayMode: 'separated' },
+    )
+    const overlay = wrapper.get('.waveform-chart__overlay--shared')
+    const width = Number(overlay.attributes('width'))
+    const height = Number(overlay.attributes('height'))
+    const releasePointerCapture = vi.fn(() => {
+      throw new DOMException('Pointer capture is no longer available', 'NotFoundError')
+    })
+    Object.defineProperty(overlay.element, 'getBoundingClientRect', {
+      value: () => ({ left: 0, top: 0, width, height }),
+    })
+    Object.defineProperty(overlay.element, 'setPointerCapture', { value: vi.fn() })
+    Object.defineProperty(overlay.element, 'releasePointerCapture', {
+      value: releasePointerCapture,
+    })
+
+    const down = new MouseEvent('pointerdown', {
+      button: 0,
+      clientX: width / 2,
+      clientY: height / 2,
+      bubbles: true,
+    })
+    Object.defineProperty(down, 'pointerId', { value: 43 })
+    overlay.element.dispatchEvent(down)
+    await wrapper.setProps({ hiddenSeriesIds: ['series-0'] })
+    await flushPromises()
+
+    expect(wrapper.find('.waveform-chart__overlay--shared').exists()).toBe(false)
+    const view = wrapper.findComponent(WaveformChartView)
+    const finishViewportDrag = (
+      view.vm as unknown as { finishViewportDrag: (event: PointerEvent) => void }
+    ).finishViewportDrag
+    const up = new MouseEvent('pointerup', {
+      clientX: width / 2,
+      clientY: height / 2,
+      bubbles: true,
+    })
+    Object.defineProperty(up, 'pointerId', { value: 43 })
+    finishViewportDrag(up as unknown as PointerEvent)
+    await flushPromises()
+
+    expect(releasePointerCapture).toHaveBeenCalledWith(43)
+    expect(wrapper.find('.waveform-chart__zoom-selection').exists()).toBe(false)
+
+    await wrapper.setProps({ hiddenSeriesIds: [] })
+    await flushPromises()
+    const nextOverlay = wrapper.get('.waveform-chart__overlay--shared')
+    Object.defineProperty(nextOverlay.element, 'getBoundingClientRect', {
+      value: () => ({ left: 0, top: 0, width, height }),
+    })
+    const nextDown = new MouseEvent('pointerdown', {
+      button: 0,
+      clientX: width / 2,
+      clientY: height / 2,
+      bubbles: true,
+    })
+    Object.defineProperty(nextDown, 'pointerId', { value: 44 })
+    nextOverlay.element.dispatchEvent(nextDown)
+    const nextMove = new MouseEvent('pointermove', {
+      clientX: width * 0.75,
+      clientY: height / 2,
+      bubbles: true,
+    })
+    Object.defineProperty(nextMove, 'pointerId', { value: 44 })
+    nextOverlay.element.dispatchEvent(nextMove)
+    await flushPromises()
+
+    expect(wrapper.find('.waveform-chart__zoom-selection').exists()).toBe(true)
+  })
+})