fix: editor content being hidden under keyboard on mobile (#1410)

packages/web/src/javascripts/Components/NoteView/AutoresizingTextarea.tsx

@@ -0,0 +1,30 @@
+import { classNames } from '@/Utils/ConcatenateClassNames'
+import { ComponentPropsWithoutRef, ForwardedRef, forwardRef } from 'react'
+
+// Based on: https://css-tricks.com/auto-growing-inputs-textareas/#aa-other-ideas
+const AutoresizingNoteViewTextarea = forwardRef(
+  ({ value, ...textareaProps }: ComponentPropsWithoutRef<'textarea'>, ref: ForwardedRef<HTMLTextAreaElement>) => {
+    return (
+      <div className="relative inline-grid min-h-[75vh] w-full grid-rows-1 items-stretch md:block md:flex-grow">
+        <pre
+          id="textarea-mobile-resizer"
+          className={classNames(
+            'editable font-editor break-word whitespace-pre-wrap',
+            'invisible [grid-area:1_/_1] md:hidden',
+          )}
+          aria-hidden
+        >
+          {value}{' '}
+        </pre>
+        <textarea
+          value={value}
+          className="editable font-editor [grid-area:1_/_1] md:h-full md:min-h-0"
+          {...textareaProps}
+          ref={ref}
+        ></textarea>
+      </div>
+    )
+  },
+)
+
+export default AutoresizingNoteViewTextarea

packages/web/src/javascripts/Components/NoteView/NoteView.tsx

@@ -37,6 +37,7 @@ import { reloadFont } from './FontFunctions'
 import { NoteViewProps } from './NoteViewProps'
 import IndicatorCircle from '../IndicatorCircle/IndicatorCircle'
 import { classNames } from '@/Utils/ConcatenateClassNames'
+import AutoresizingNoteViewTextarea from './AutoresizingTextarea'
 
 const MINIMUM_STATUS_DURATION = 400
 const TEXTAREA_DEBOUNCE = 100
@@ -889,7 +890,7 @@ class NoteView extends PureComponent<NoteViewProps, State> {
 
     return (
       <div aria-label="Note" className="section editor sn-component">
-        <div className="flex flex-grow flex-col">
+        <div className="flex-grow flex-col md:flex">
           {this.state.noteLocked && (
             <EditingDisabledBanner
               onMouseLeave={() => {
@@ -1021,9 +1022,8 @@ class NoteView extends PureComponent<NoteViewProps, State> {
             )}
 
             {this.state.editorStateDidLoad && !this.state.editorComponentViewer && !this.state.textareaUnloading && (
-              <textarea
+              <AutoresizingNoteViewTextarea
                 autoComplete="off"
-                className="editable font-editor"
                 dir="auto"
                 id={ElementIds.NoteTextEditor}
                 onChange={this.onTextAreaChange}
@@ -1032,7 +1032,7 @@ class NoteView extends PureComponent<NoteViewProps, State> {
                 onFocus={this.onContentFocus}
                 spellCheck={this.state.spellcheck}
                 ref={(ref) => ref && this.onSystemEditorLoad(ref)}
-              ></textarea>
+              />
             )}
 
             {this.state.marginResizersEnabled && this.editorContentRef.current ? (