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opencode v2 mirror
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2.6 kB · 83 lines
TypeScript
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384export type HoverCommentLine = { lineNumber: number side?: "additions" | "deletions"}
export function createHoverCommentUtility(props: { label: string getHoveredLine: () => HoverCommentLine | undefined onSelect: (line: HoverCommentLine) => void}) { if (typeof document === "undefined") return
const button = document.createElement("button") button.type = "button" button.ariaLabel = props.label button.textContent = "+" button.style.width = "20px" button.style.height = "20px" button.style.display = "flex" button.style.alignItems = "center" button.style.justifyContent = "center" button.style.border = "none" button.style.borderRadius = "var(--radius-md)" button.style.background = "var(--icon-interactive-base)" button.style.color = "var(--white)" button.style.boxShadow = "var(--shadow-xs)" button.style.fontSize = "14px" button.style.lineHeight = "1" button.style.cursor = "pointer" button.style.position = "relative" button.style.left = "30px" button.style.top = "calc((var(--diffs-line-height, 24px) - 20px) / 2)"
let line: HoverCommentLine | undefined
const sync = () => { const next = props.getHoveredLine() if (!next) return line = next }
// The hovered line changes when the pointer moves or when content scrolls under // a stationary pointer, so track both with passive listeners instead of polling // every animation frame. There is no teardown hook for this utility; like the // rAF loop this replaced, the listeners self-detach on the first event after // the button leaves the DOM. const onHoverInvalidated = () => { if (!button.isConnected) { document.removeEventListener("pointermove", onHoverInvalidated) document.removeEventListener("scroll", onHoverInvalidated, true) return } sync() }
const open = () => { const next = props.getHoveredLine() ?? line if (!next) return props.onSelect(next) }
document.addEventListener("pointermove", onHoverInvalidated, { passive: true }) document.addEventListener("scroll", onHoverInvalidated, { passive: true, capture: true }) button.addEventListener("mouseenter", sync) button.addEventListener("mousemove", sync) button.addEventListener("pointerdown", (event) => { event.preventDefault() event.stopPropagation() sync() }) button.addEventListener("mousedown", (event) => { event.preventDefault() event.stopPropagation() sync() }) button.addEventListener("click", (event) => { event.preventDefault() event.stopPropagation() open() })
return button}