|
| 1 | +/** One delegated listener set, including icon controls inside open ShadowRoots. */ |
| 2 | +export function installIconTooltips(root, show, hide) { |
| 3 | + let press, timer, suppressed, observer; |
| 4 | + let shadowRoots = []; |
| 5 | + const pointers = new Set(); |
| 6 | + const labelOf = (node) => |
| 7 | + ["data-label", "aria-label", "title"] |
| 8 | + .map((name) => node.getAttribute(name)?.trim()) |
| 9 | + .find(Boolean); |
| 10 | + const targetOf = (event) => { |
| 11 | + const path = event.composedPath(); |
| 12 | + // Quicktools already own their tooltip, repeat and modifier gestures. |
| 13 | + if (path.some((node) => node?.id === "quick-tools")) return; |
| 14 | + return path.find( |
| 15 | + (node) => |
| 16 | + node?.matches?.("button, [role='button'], .icon") && labelOf(node), |
| 17 | + ); |
| 18 | + }; |
| 19 | + function dismiss() { |
| 20 | + clearTimeout(timer); |
| 21 | + press = undefined; |
| 22 | + observer?.disconnect(); |
| 23 | + observer = undefined; |
| 24 | + for (const shadow of shadowRoots) |
| 25 | + shadow.removeEventListener("scroll", dismiss, true); |
| 26 | + shadowRoots = []; |
| 27 | + hide(); |
| 28 | + } |
| 29 | + function down(event) { |
| 30 | + pointers.add(event.pointerId); |
| 31 | + dismiss(); |
| 32 | + suppressed = undefined; |
| 33 | + if (pointers.size !== 1 || event.button !== 0) return; |
| 34 | + const target = targetOf(event); |
| 35 | + if (!target) return; |
| 36 | + // Element scroll events do not cross a shadow boundary. |
| 37 | + shadowRoots = event |
| 38 | + .composedPath() |
| 39 | + .filter((node) => node?.nodeType === 11 && node.host); |
| 40 | + for (const shadow of shadowRoots) |
| 41 | + shadow.addEventListener("scroll", dismiss, true); |
| 42 | + press = { target, x: event.clientX, y: event.clientY, held: false }; |
| 43 | + timer = setTimeout(() => { |
| 44 | + if (!press || !target.isConnected) return; |
| 45 | + press.held = true; |
| 46 | + show(target, labelOf(target), target.dataset.description); |
| 47 | + observer = new MutationObserver(() => { |
| 48 | + if (!target.isConnected) dismiss(); |
| 49 | + }); |
| 50 | + // Also observe removal of the tab's host, including nested shadow hosts. |
| 51 | + for (const boundary of [root, ...shadowRoots]) |
| 52 | + observer.observe(boundary, { childList: true, subtree: true }); |
| 53 | + }, 500); |
| 54 | + } |
| 55 | + function move(event) { |
| 56 | + if ( |
| 57 | + press && |
| 58 | + Math.hypot(event.clientX - press.x, event.clientY - press.y) > 10 |
| 59 | + ) |
| 60 | + dismiss(); |
| 61 | + } |
| 62 | + function up(event) { |
| 63 | + pointers.delete(event.pointerId); |
| 64 | + clearTimeout(timer); |
| 65 | + if (press?.held) |
| 66 | + suppressed = { target: press.target, until: Date.now() + 750 }; |
| 67 | + press = undefined; |
| 68 | + } |
| 69 | + function cancel(event) { |
| 70 | + pointers.delete(event.pointerId); |
| 71 | + dismiss(); |
| 72 | + } |
| 73 | + function click(event) { |
| 74 | + if ( |
| 75 | + event.detail && |
| 76 | + suppressed?.target === targetOf(event) && |
| 77 | + Date.now() < suppressed.until |
| 78 | + ) { |
| 79 | + event.preventDefault(); |
| 80 | + event.stopImmediatePropagation(); |
| 81 | + } |
| 82 | + suppressed = undefined; |
| 83 | + } |
| 84 | + function contextmenu(event) { |
| 85 | + // A control's own menu wins over the shared tooltip. |
| 86 | + if (event.defaultPrevented) { |
| 87 | + dismiss(); |
| 88 | + return; |
| 89 | + } |
| 90 | + if (press?.held && press.target === targetOf(event)) event.preventDefault(); |
| 91 | + } |
| 92 | + function reset() { |
| 93 | + pointers.clear(); |
| 94 | + suppressed = undefined; |
| 95 | + dismiss(); |
| 96 | + } |
| 97 | + const events = { |
| 98 | + pointerdown: down, |
| 99 | + pointermove: move, |
| 100 | + pointerup: up, |
| 101 | + pointercancel: cancel, |
| 102 | + click, |
| 103 | + scroll: dismiss, |
| 104 | + keydown: dismiss, |
| 105 | + }; |
| 106 | + for (const [name, handler] of Object.entries(events)) |
| 107 | + root.addEventListener(name, handler, true); |
| 108 | + root.addEventListener("contextmenu", contextmenu); |
| 109 | + const viewport = root.defaultView?.visualViewport; |
| 110 | + root.defaultView?.addEventListener("blur", reset); |
| 111 | + viewport?.addEventListener("resize", dismiss); |
| 112 | + viewport?.addEventListener("scroll", dismiss); |
| 113 | + return { |
| 114 | + dismiss: reset, |
| 115 | + dispose() { |
| 116 | + reset(); |
| 117 | + for (const [name, handler] of Object.entries(events)) |
| 118 | + root.removeEventListener(name, handler, true); |
| 119 | + root.removeEventListener("contextmenu", contextmenu); |
| 120 | + root.defaultView?.removeEventListener("blur", reset); |
| 121 | + viewport?.removeEventListener("resize", dismiss); |
| 122 | + viewport?.removeEventListener("scroll", dismiss); |
| 123 | + }, |
| 124 | + }; |
| 125 | +} |
0 commit comments