| 1 | // The ⌘K palette. Enhancement only. | |
| 2 | // | |
| 3 | // Without this script the masthead control is a plain link to /search and the | |
| 4 | // overlay stays `hidden`, so nothing here is load-bearing — it is a faster | |
| 5 | // route to a page that is reachable anyway. That is also why the ⌘K keycap | |
| 6 | // starts hidden in the markup: advertising a shortcut that does not work is | |
| 7 | // worse than not advertising it. | |
| 8 | // | |
| 9 | // Results come from htmx hitting /search?fragment=1. This file never renders a | |
| 10 | // result, so there is no second copy of the visibility rule to get wrong. | |
| 11 | (function () { | |
| 12 | var backdrop = document.querySelector("[data-palette]"); | |
| 13 | var input = document.querySelector("[data-palette-input]"); | |
| 14 | if (!backdrop || !input) return; | |
| 15 | ||
| 16 | var opener = document.querySelector("[data-palette-open]"); | |
| 17 | var kbd = document.querySelector("[data-palette-kbd]"); | |
| 18 | var lastFocus = null; | |
| 19 | ||
| 20 | // Mac gets ⌘, everything else Ctrl. Checking the platform is unreliable in | |
| 21 | // general but perfectly adequate for choosing which glyph to draw. | |
| 22 | var isMac = /Mac|iPhone|iPad/.test(navigator.platform || ""); | |
| 23 | if (kbd) { | |
| 24 | kbd.textContent = isMac ? "⌘K" : "Ctrl K"; | |
| 25 | kbd.hidden = false; | |
| 26 | } | |
| 27 | ||
| 28 | function open() { | |
| 29 | if (!backdrop.hidden) return; | |
| 30 | lastFocus = document.activeElement; | |
| 31 | backdrop.hidden = false; | |
| 32 | input.value = ""; | |
| 33 | input.focus(); | |
| 34 | } | |
| 35 | ||
| 36 | function close() { | |
| 37 | if (backdrop.hidden) return; | |
| 38 | backdrop.hidden = true; | |
| 39 | if (lastFocus && lastFocus.focus) lastFocus.focus(); | |
| 40 | } | |
| 41 | ||
| 42 | if (opener) { | |
| 43 | opener.addEventListener("click", function (e) { | |
| 44 | e.preventDefault(); | |
| 45 | open(); | |
| 46 | }); | |
| 47 | } | |
| 48 | ||
| 49 | document.addEventListener("keydown", function (e) { | |
| 50 | var accel = isMac ? e.metaKey : e.ctrlKey; | |
| 51 | if (accel && (e.key === "k" || e.key === "K")) { | |
| 52 | e.preventDefault(); | |
| 53 | backdrop.hidden ? open() : close(); | |
| 54 | return; | |
| 55 | } | |
| 56 | if (e.key === "Escape" && !backdrop.hidden) { | |
| 57 | e.preventDefault(); | |
| 58 | close(); | |
| 59 | } | |
| 60 | }); | |
| 61 | ||
| 62 | // Clicking the backdrop closes; clicking the panel inside it must not. | |
| 63 | backdrop.addEventListener("click", function (e) { | |
| 64 | if (e.target === backdrop) close(); | |
| 65 | }); | |
| 66 | ||
| 67 | // Arrow keys walk the results. The input keeps focus throughout so typing | |
| 68 | // never has to be resumed — only Enter leaves, by following the active row. | |
| 69 | function items() { | |
| 70 | return Array.prototype.slice.call( | |
| 71 | backdrop.querySelectorAll(".palette-item") | |
| 72 | ); | |
| 73 | } | |
| 74 | ||
| 75 | function activeIndex(list) { | |
| 76 | for (var i = 0; i < list.length; i++) { | |
| 77 | if (list[i].classList.contains("is-active")) return i; | |
| 78 | } | |
| 79 | return -1; | |
| 80 | } | |
| 81 | ||
| 82 | function activate(list, i) { | |
| 83 | list.forEach(function (el) { | |
| 84 | el.classList.remove("is-active"); | |
| 85 | }); | |
| 86 | if (list[i]) { | |
| 87 | list[i].classList.add("is-active"); | |
| 88 | list[i].scrollIntoView({ block: "nearest" }); | |
| 89 | } | |
| 90 | } | |
| 91 | ||
| 92 | input.addEventListener("keydown", function (e) { | |
| 93 | var list = items(); | |
| 94 | if (!list.length) return; | |
| 95 | var i = activeIndex(list); | |
| 96 | ||
| 97 | if (e.key === "ArrowDown") { | |
| 98 | e.preventDefault(); | |
| 99 | activate(list, i + 1 >= list.length ? 0 : i + 1); | |
| 100 | } else if (e.key === "ArrowUp") { | |
| 101 | e.preventDefault(); | |
| 102 | activate(list, i <= 0 ? list.length - 1 : i - 1); | |
| 103 | } else if (e.key === "Enter") { | |
| 104 | // With nothing selected, fall through to the form's own behaviour: | |
| 105 | // a full search for whatever was typed. | |
| 106 | if (i < 0) return; | |
| 107 | e.preventDefault(); | |
| 108 | list[i].click(); | |
| 109 | } | |
| 110 | }); | |
| 111 | ||
| 112 | // Fresh results, fresh selection: the first row is pre-selected so Enter | |
| 113 | // does the obvious thing immediately after typing. | |
| 114 | document.body.addEventListener("htmx:afterSwap", function (e) { | |
| 115 | if (e.target && e.target.id === "palette-results") { | |
| 116 | var list = items(); | |
| 117 | if (list.length) activate(list, 0); | |
| 118 | } | |
| 119 | }); | |
| 120 | ||
| 121 | backdrop.addEventListener("click", function (e) { | |
| 122 | var cmd = e.target.closest && e.target.closest("[data-palette-theme]"); | |
| 123 | if (cmd && window.dogfoodToggleTheme) { | |
| 124 | e.preventDefault(); | |
| 125 | window.dogfoodToggleTheme(); | |
| 126 | close(); | |
| 127 | } | |
| 128 | }); | |
| 129 | })(); |
129 lines · JavaScript