Swap datepicker implementations

package.json

@@ -64,6 +64,7 @@
     "@noble/curves": "^1.9.7",
     "@pomade/core": "^0.3.1",
     "@poppanator/sveltekit-svg": "^7.0.0",
+    "@svelte-plugins/datepicker": "^1.0.11",
     "@sveltejs/adapter-static": "^3.0.10",
     "@tiptap/core": "^2.27.2",
     "@tiptap/pm": "^2.27.2",
@@ -83,7 +84,6 @@
     "@welshman/util": "^0.8.16",
     "cheerio": "^1.2.0",
     "compressorjs-next": "^1.1.2",
-    "date-picker-svelte": "^2.17.0",
     "dotenv": "^16.6.1",
     "emoji-picker-element": "^1.28.1",
     "emoji-picker-element-data": "^1.8.0",

src/app/components/CalendarEventForm.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
   import type {Snippet} from "svelte"
   import {writable} from "svelte/store"
-  import {randomId, HOUR} from "@welshman/lib"
+  import {randomId} from "@welshman/lib"
   import {makeEvent, EVENT_TIME} from "@welshman/util"
   import {publishThunk, waitForThunkError} from "@welshman/app"
   import {preventDefault} from "@lib/html"
@@ -16,7 +16,7 @@
   import ModalFooter from "@lib/components/ModalFooter.svelte"
   import Modal from "@lib/components/Modal.svelte"
   import ModalBody from "@lib/components/ModalBody.svelte"
-  import DateTimeInput from "@lib/components/DateTimeInput.svelte"
+  import DateTimeRangeInput from "@lib/components/DateTimeRangeInput.svelte"
   import EditorContent from "@app/editor/EditorContent.svelte"
   import {PROTECTED, publishRoomQuote} from "@app/groups"
   import {makeEditor} from "@app/editor"
@@ -134,7 +134,6 @@
   let location = $state(initialValues?.location ?? "")
   let start: number | undefined = $state(initialValues?.start)
   let end: number | undefined = $state(initialValues?.end)
-  let endDirty = $state(Boolean(initialValues?.end))
   let content = $state(initialValues?.content ?? "")
 
   const onChange = (json: object) => {
@@ -146,14 +145,6 @@
   $effect(() => {
     draftKey.set({d, title, location, start, end, content})
   })
-
-  $effect(() => {
-    if (!endDirty && start) {
-      end = start + HOUR
-    } else if (end) {
-      endDirty = true
-    }
-  })
 </script>
 
 <Modal tag="form" novalidate onsubmit={preventDefault(submit)}>
@@ -194,18 +185,10 @@
     </Field>
     <Field>
       {#snippet label()}
-        Start*
+        <p>Date and time*</p>
       {/snippet}
       {#snippet input()}
-        <DateTimeInput bind:value={start} />
-      {/snippet}
-    </Field>
-    <Field>
-      {#snippet label()}
-        End*
-      {/snippet}
-      {#snippet input()}
-        <DateTimeInput bind:value={end} />
+        <DateTimeRangeInput bind:start bind:end />
       {/snippet}
     </Field>
     <Field>

src/lib/components/DateTimeInput.svelte

@@ -1,9 +1,9 @@
 <script lang="ts">
   import {onMount} from "svelte"
-  import {DateInput} from "date-picker-svelte"
-  import {secondsToDate, dateToSeconds} from "@welshman/lib"
+  import {DatePicker} from "@svelte-plugins/datepicker"
   import CloseCircle from "@assets/icons/close-circle.svg?dataurl"
   import CalendarMinimalistic from "@assets/icons/calendar-minimalistic.svg?dataurl"
+  import {anchorDatepicker} from "@lib/html"
   import Icon from "@lib/components/Icon.svelte"
   import Button from "@lib/components/Button.svelte"
 
@@ -13,95 +13,66 @@
 
   let {value = $bindable()}: Props = $props()
 
-  const pad = (n: number) => ("00" + String(n)).slice(-2)
+  // The picker works in millisecond timestamps that include the time of day
+  // selected via its time input; we expose unix seconds
+  let element: HTMLElement
+  let isOpen = $state(false)
+  let startDate: number | null = $state(value ? value * 1000 : null)
+  let startDateTime = $state("")
 
-  const getTime = (d: Date, m: string) => `${pad(d.getHours())}:${m}`
+  // When no date is provided the library initializes its time input from the
+  // epoch (a locale-dependent afternoon); reset it to something friendlier
+  onMount(() => {
+    if (!startDate) startDateTime = "12:00"
+  })
 
-  const setTime = (d: Date, time: string) => {
-    const [hours, minutes] = time.split(":").map(x => parseInt(x))
-    const newDate = new Date(d)
-
-    newDate.setHours(hours, minutes, 0, 0)
-
-    return newDate
+  const toggle = () => {
+    isOpen = !isOpen
   }
 
-  const onTimeChange = () => {
-    if (time) {
-      minutes = time.slice(-2)
-      date = setTime(date || new Date(), time)
-    }
-  }
-
-  const focusDate = () => element.querySelector("input")?.focus()
-
   const clear = () => {
-    date = undefined
-    time = undefined
+    startDate = null
+    isOpen = false
   }
 
-  const initialDate = value ? secondsToDate(value) : undefined
-  const initialTime = initialDate ? getTime(initialDate, pad(initialDate.getMinutes())) : undefined
-  const initialMinutes = initialTime ? initialTime.slice(-2) : "00"
+  const fmt = (ts: number) =>
+    new Date(ts).toLocaleString([], {dateStyle: "medium", timeStyle: "short"})
 
-  let date: Date | undefined = $state(initialDate)
-  let time: string | undefined = $state(initialTime)
-  let minutes: string = $state(initialMinutes)
-  let element: HTMLElement
+  const display = $derived(startDate ? fmt(startDate) : "")
 
-  // When mounted during a reactive flush (e.g. inside a modal), DateInput's legacy
-  // `$:` chain runs against a stale inner store and writes null back through the
-  // binding, wiping the initial date. It can't happen legitimately this early, so
-  // restore it after mount.
-  onMount(() => {
-    if (initialDate && !date) {
-      date = initialDate
+  $effect(() => {
+    if (isOpen && element) {
+      return anchorDatepicker(element)
     }
   })
 
-  // Sync date to time and value
   $effect(() => {
-    if (date) {
-      time = getTime(date, minutes)
-      value = dateToSeconds(date)
-    } else {
-      value = undefined
-    }
-  })
-
-  // Sync updates to value to date/time
-  $effect(() => {
-    const derivedDate = value ? secondsToDate(value) : undefined
-    const derivedTime = derivedDate ? getTime(derivedDate, minutes) : undefined
-
-    date = derivedDate
-    time = derivedTime
+    value = startDate ? Math.round(startDate / 1000) : undefined
   })
 </script>
 
-<div class="relative focus-within:z-modal grid grid-cols-2 gap-2" bind:this={element}>
-  <div class="relative group z-popover">
-    <DateInput format="yyyy-MM-dd" placeholder="" bind:value={date} />
-    <div
-      class="absolute right-2 top-0 flex h-12 cursor-pointer items-center gap-2 opacity-100 group-focus-within:opacity-0 group-focus-within:pointer-events-none transition-opacity pointer-events-none">
-      {#if date}
-        <Button onclick={clear} class="h-5 pointer-events-auto">
+<div class="relative focus-within:z-modal" bind:this={element}>
+  <DatePicker
+    bind:isOpen
+    bind:startDate
+    bind:startDateTime
+    showTimePicker
+    enableFutureDates
+    includeFont={false}>
+    <label class="input input-group cursor-pointer">
+      <Icon icon={CalendarMinimalistic} />
+      <input
+        type="text"
+        readonly
+        class="grow cursor-pointer"
+        placeholder="Select date"
+        value={display}
+        onclick={toggle} />
+      {#if startDate}
+        <Button onclick={clear} class="h-5">
           <Icon icon={CloseCircle} />
         </Button>
-      {:else}
-        <Button onclick={focusDate} class="h-5 pointer-events-auto">
-          <Icon icon={CalendarMinimalistic} />
-        </Button>
       {/if}
-    </div>
-  </div>
-  <label class="input input-group flex items-center relative">
-    <input
-      list="time-options"
-      class="grow"
-      type="time"
-      step="300"
-      bind:value={time}
-      onchange={onTimeChange} />
-  </label>
+    </label>
+  </DatePicker>
 </div>

src/lib/components/DateTimeRangeInput.svelte

@@ -0,0 +1,79 @@
+<script lang="ts">
+  import {onMount} from "svelte"
+  import {DatePicker} from "@svelte-plugins/datepicker"
+  import CalendarMinimalistic from "@assets/icons/calendar-minimalistic.svg?dataurl"
+  import {anchorDatepicker} from "@lib/html"
+  import Icon from "@lib/components/Icon.svelte"
+
+  interface Props {
+    start?: number | undefined
+    end?: number | undefined
+  }
+
+  let {start = $bindable(), end = $bindable()}: Props = $props()
+
+  // The picker works in millisecond timestamps that include the time of day
+  // selected via its time inputs; we expose unix seconds
+  let element: HTMLElement
+  let isOpen = $state(false)
+  let startDate: number | null = $state(start ? start * 1000 : null)
+  let endDate: number | null = $state(end ? end * 1000 : null)
+  let startDateTime = $state("")
+  let endDateTime = $state("")
+
+  // When no date is provided the library initializes its time inputs from the
+  // epoch (a locale-dependent afternoon); reset them for the create flow
+  onMount(() => {
+    if (!startDate) startDateTime = "12:00"
+    if (!endDate) endDateTime = "13:00"
+  })
+
+  const toggle = () => {
+    isOpen = !isOpen
+  }
+
+  const fmt = (ts: number) =>
+    new Date(ts).toLocaleString([], {dateStyle: "medium", timeStyle: "short"})
+
+  const display = $derived(
+    startDate ? (endDate ? `${fmt(startDate)} – ${fmt(endDate)}` : fmt(startDate)) : "",
+  )
+
+  $effect(() => {
+    if (isOpen && element) {
+      return anchorDatepicker(element)
+    }
+  })
+
+  $effect(() => {
+    start = startDate ? Math.round(startDate / 1000) : undefined
+  })
+
+  $effect(() => {
+    end = endDate ? Math.round(endDate / 1000) : undefined
+  })
+</script>
+
+<div class="relative focus-within:z-modal" bind:this={element}>
+  <DatePicker
+    bind:isOpen
+    bind:startDate
+    bind:endDate
+    bind:startDateTime
+    bind:endDateTime
+    isRange
+    showTimePicker
+    enableFutureDates
+    includeFont={false}>
+    <label class="input input-group cursor-pointer">
+      <Icon icon={CalendarMinimalistic} />
+      <input
+        type="text"
+        readonly
+        class="grow cursor-pointer"
+        placeholder="Select dates"
+        value={display}
+        onclick={toggle} />
+    </label>
+  </DatePicker>
+</div>

src/lib/components/base.css

@@ -264,6 +264,91 @@ body.keyboard-open .room__compose {
   padding: 0.65rem;
 }
 
+/* @svelte-plugins/datepicker — the library declares its variables on :root,
+   where chained var() references resolve immediately, and our theme tokens
+   only exist under .fl; so each color is overridden individually here. The
+   tripled selector out-specifies the component's scoped .datepicker rule. */
+.datepicker.datepicker.datepicker {
+  --datepicker-font-family: var(--font-body);
+  --datepicker-color: var(--content);
+  --datepicker-border-color: var(--line);
+  --datepicker-state-active: var(--primary);
+  --datepicker-state-hover: var(--surface-more);
+
+  --datepicker-container-background: var(--surface);
+  --datepicker-container-border: var(--border-thin) solid var(--line);
+
+  --datepicker-calendar-header-color: var(--content);
+  --datepicker-calendar-header-text-color: var(--content);
+  --datepicker-calendar-header-month-nav-color: var(--content);
+  --datepicker-calendar-header-month-nav-background-hover: var(--surface-more);
+  --datepicker-calendar-header-year-nav-color: var(--content);
+
+  --datepicker-calendar-dow-color: var(--content-muted);
+  --datepicker-calendar-day-color: var(--content);
+  --datepicker-calendar-day-color-hover: var(--content);
+  --datepicker-calendar-day-background-hover: var(--surface-more);
+  --datepicker-calendar-day-color-disabled: var(--content-subtle);
+  --datepicker-calendar-day-other-color: var(--content-subtle);
+  --datepicker-calendar-today-border: var(--border-thin) solid var(--line-more);
+
+  /* pale wash for in-range days and the square connectors that join the
+     endpoint circles; endpoints themselves get full primary + primary-content */
+  --fl-dp-wash: color-mix(in srgb, var(--primary) 14%, var(--surface));
+
+  --datepicker-calendar-range-color: var(--content);
+  --datepicker-calendar-range-background: var(--fl-dp-wash);
+  --datepicker-calendar-range-background-disabled: var(--fl-dp-wash);
+  --datepicker-calendar-range-start-box-shadow: inset -20px 0 0 var(--fl-dp-wash);
+  --datepicker-calendar-range-end-box-shadow: inset 20px 0 0 var(--fl-dp-wash);
+  --datepicker-calendar-range-start-box-shadow-selected: inset -20px 0 0 var(--fl-dp-wash);
+  --datepicker-calendar-range-end-box-shadow-selected: inset 20px 0 0 var(--fl-dp-wash);
+  --datepicker-calendar-range-start-end-background: var(--primary);
+  --datepicker-calendar-range-start-end-color: var(--primary-content);
+  --datepicker-calendar-range-selected-background: var(--primary);
+  --datepicker-calendar-range-selected-color: var(--primary-content);
+  --datepicker-calendar-range-included-background: var(--fl-dp-wash);
+  --datepicker-calendar-range-included-box-shadow: inset 20px 0 0 var(--fl-dp-wash);
+  --datepicker-calendar-range-included-color: var(--content);
+
+  --datepicker-timepicker-input-border: var(--border-thin) solid var(--line);
+}
+
+/* While only the start of a range is picked, the cell doesn't yet have the
+   .range class, so the library's generic day-hover rule (square, gray) paints
+   over the selected circle. Keep the selected look on hover instead. The :not()
+   chain exists to out-specify that hover rule, which carries five of its own. */
+.datepicker.datepicker.datepicker
+  .calendar
+  .date.start:not(.range):not(.other):not(.past):not(.future):not(.disabled)
+  span:hover,
+.datepicker.datepicker.datepicker
+  .calendar
+  .date.end:not(.range):not(.other):not(.past):not(.future):not(.disabled)
+  span:hover {
+  background-color: var(--primary);
+  color: var(--primary-content);
+  border-radius: var(--datepicker-calendar-range-selected-border-radius);
+}
+
+/* Hovering the picked start makes the cell both ends of a zero-width preview
+   range; the library's !important sibling rules still paint a square connector
+   shadow behind the circle, so remove it (their !important, out-specified) */
+.datepicker.datepicker.datepicker .calendars-container .calendar .date.rangehover.start.end {
+  box-shadow: none !important;
+}
+
+/* A freshly picked start with no end and no hover preview carries the same
+   classes as the start of a real range, so the library paints its half-cell
+   connector shadow toward a range that doesn't exist yet. The only reliable
+   distinguisher is whether the next day is in-range. */
+.datepicker.datepicker.datepicker
+  .calendars-container
+  .calendar
+  .date.range.start:not(:has(+ .range, + .rangehover)) {
+  box-shadow: none;
+}
+
 /* link-content (tiptap pill) */
 .link-content {
   @apply bg-surface text-content max-w-full overflow-hidden px-1 text-ellipsis whitespace-nowrap;

src/lib/components/controls.css

@@ -68,7 +68,7 @@
     }
   }
 
-  .range {
+  input.range {
     @apply bg-surface-more w-full cursor-pointer appearance-none rounded-full;
     height: 0.5rem;
 

src/lib/html.ts

@@ -1,6 +1,50 @@
 import {sleep, randomId} from "@welshman/lib"
 export {preventDefault, stopPropagation} from "svelte/legacy"
 
+// Anchors an @svelte-plugins/datepicker popup with fixed positioning so it
+// escapes scroll-container clipping (e.g. inside modals). Call when the picker
+// opens; returns a cleanup function that removes the listeners.
+export const anchorDatepicker = (wrapper: HTMLElement) => {
+  const reposition = () => {
+    const anchor = wrapper.querySelector("label")
+    const container = wrapper.querySelector(".calendars-container") as HTMLElement | null
+
+    if (!anchor || !container) return
+
+    const margin = 8
+    const rect = anchor.getBoundingClientRect()
+    const height = container.offsetHeight
+    const width = container.offsetWidth
+
+    let top = rect.bottom + 4
+
+    // flip above the input when there's not enough room below, else pin to the bottom edge
+    if (height && top + height > innerHeight - margin) {
+      top =
+        rect.top - height - 4 >= margin
+          ? rect.top - height - 4
+          : Math.max(margin, innerHeight - height - margin)
+    }
+
+    const left = width
+      ? Math.max(margin, Math.min(rect.left, innerWidth - width - margin))
+      : rect.left
+
+    wrapper.style.setProperty("--datepicker-container-position", "fixed")
+    wrapper.style.setProperty("--datepicker-container-top", `${top}px`)
+    wrapper.style.setProperty("--datepicker-container-left", `${left}px`)
+  }
+
+  reposition()
+  addEventListener("scroll", reposition, true)
+  addEventListener("resize", reposition)
+
+  return () => {
+    removeEventListener("scroll", reposition, true)
+    removeEventListener("resize", reposition)
+  }
+}
+
 export const copyToClipboard = (text: string) => {
   const {activeElement} = document
   const input = document.createElement("textarea")