feat(version): versions

1 files changed, 100 insertions, 0 deletions

diff --git a/src/templates/assets/javascripts/patches/scrollfix/index.ts b/src/templates/assets/javascripts/patches/scrollfix/index.ts
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+/*
+ * Copyright (c) 2016-2023 Martin Donath <martin.donath@squidfunk.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+import {
+  Observable,
+  filter,
+  fromEvent,
+  map,
+  mergeMap,
+  switchMap,
+  tap
+} from "rxjs"
+
+import { getElements } from "~/browser"
+
+/* ----------------------------------------------------------------------------
+ * Helper types
+ * ------------------------------------------------------------------------- */
+
+/**
+ * Patch options
+ */
+interface PatchOptions {
+  document$: Observable<Document>      /* Document observable */
+}
+
+/* ----------------------------------------------------------------------------
+ * Helper functions
+ * ------------------------------------------------------------------------- */
+
+/**
+ * Check whether the given device is an Apple device
+ *
+ * @returns Test result
+ */
+function isAppleDevice(): boolean {
+  return /(iPad|iPhone|iPod)/.test(navigator.userAgent)
+}
+
+/* ----------------------------------------------------------------------------
+ * Functions
+ * ------------------------------------------------------------------------- */
+
+/**
+ * Patch all elements with `data-md-scrollfix` attributes
+ *
+ * This is a year-old patch which ensures that overflow scrolling works at the
+ * top and bottom of containers on iOS by ensuring a `1px` scroll offset upon
+ * the start of a touch event.
+ *
+ * @see https://bit.ly/2SCtAOO - Original source
+ *
+ * @param options - Options
+ */
+export function patchScrollfix(
+  { document$ }: PatchOptions
+): void {
+  document$
+    .pipe(
+      switchMap(() => getElements("[data-md-scrollfix]")),
+      tap(el => el.removeAttribute("data-md-scrollfix")),
+      filter(isAppleDevice),
+      mergeMap(el => fromEvent(el, "touchstart")
+        .pipe(
+          map(() => el)
+        )
+      )
+    )
+      .subscribe(el => {
+        const top = el.scrollTop
+
+        /* We're at the top of the container */
+        if (top === 0) {
+          el.scrollTop = 1
+
+        /* We're at the bottom of the container */
+        } else if (top + el.offsetHeight === el.scrollHeight) {
+          el.scrollTop = top - 1
+        }
+      })
+}