Function handlePreviewKey

packages/app-core/src/components/VimNav.tsx:1553–1645

(
    e: KeyboardEvent,
    previewEl: HTMLElement,
    state: ReturnType<typeof useStore.getState>,
    panel: 'editor' | 'hoverpreview' = 'editor'
  )

  }

  function handlePreviewKey(
    e: KeyboardEvent,
    previewEl: HTMLElement,
    state: ReturnType<typeof useStore.getState>,
    panel: 'editor' | 'hoverpreview' = 'editor'
  ): void {
    const key = e.key
    const overrides = state.keymapOverrides
    const navKeys = new Set([
      'ArrowDown',
      'ArrowUp',
      'PageDown',
      'PageUp',
      'Home',
      'End'
    ])
    const wantsHalfPageDown = matchesSequenceToken(e, overrides, 'nav.halfPageDown')
    const wantsHalfPageUp = matchesSequenceToken(e, overrides, 'nav.halfPageUp')
    const wantsContextMenu =
      (matchesSequenceToken(e, overrides, 'nav.contextMenu') ||
        wantsNativeContextMenuKey(e)) &&
      !!getActiveTabContextMenuTarget(state)

    if (
      navKeys.has(key) ||
      wantsHalfPageDown ||
      wantsHalfPageUp ||
      matchesSequenceToken(e, overrides, 'nav.moveDown') ||
      matchesSequenceToken(e, overrides, 'nav.moveUp') ||
      matchesSequenceToken(e, overrides, 'nav.jumpBottom') ||
      sequenceTokenFromEvent(e) === getSequenceTokens(overrides, 'nav.jumpTop')[0] ||
      matchesSequenceToken(e, overrides, 'nav.filter') ||
      wantsContextMenu
    ) {
      e.preventDefault()
      e.stopImmediatePropagation()
    } else {
      return
    }

    if (state.focusedPanel !== panel) state.setFocusedPanel(panel)

    if (matchesSequenceToken(e, overrides, 'nav.moveDown') || key === 'ArrowDown') {
      scrollPreviewBy(previewEl, getPreviewLineStep(previewEl))
      return
    }
    if (matchesSequenceToken(e, overrides, 'nav.moveUp') || key === 'ArrowUp') {
      scrollPreviewBy(previewEl, -getPreviewLineStep(previewEl))
      return
    }
    if (key === 'PageDown' || wantsHalfPageDown) {
      scrollPreviewBy(previewEl, getPreviewPageStep(previewEl))
      return
    }
    if (key === 'PageUp' || wantsHalfPageUp) {
      scrollPreviewBy(previewEl, -getPreviewPageStep(previewEl))
      return
    }