remove list item if empty + enter pressed

Co-authored-by: Marcin Wojnarowski <xmarcinmarcin@gmail.com>

lib/markdown_formatter.dart

@@ -1,5 +1,8 @@
 import 'package:flutter/services.dart';
 
+const unorderedListTypes = ['*', '+', '-'];
+const orderedListTypes = [')', '.'];
+
 extension Utilities on String {
   int getBeginningOfTheLine(int from) {
     if (from <= 0) return 0;
@@ -37,6 +40,19 @@ extension on TextEditingValue {
       ),
     );
   }
+
+  /// cuts [characterCount] number of chars from before the cursor
+  TextEditingValue trimBeforeCursor(int characterCount) {
+    final beg = text.substring(0, selection.baseOffset);
+    final end = text.substring(selection.baseOffset);
+
+    return copyWith(
+        text: beg.substring(0, beg.length - characterCount - 1) + end,
+        selection: selection.copyWith(
+          baseOffset: selection.baseOffset - characterCount,
+          extentOffset: selection.extentOffset - characterCount,
+        ));
+  }
 }
 
 /// Provides convenience formatting in markdown text fields
@@ -56,35 +72,52 @@ class MarkdownFormatter extends TextInputFormatter {
 
       TextEditingValue unorderedListContinuation(
           String listChar, TextEditingValue tev) {
-        final regex = RegExp(r'(\s*)' '${RegExp.escape(listChar)} ');
+        final regex = RegExp(r'(\s*)' '${RegExp.escape(listChar)} (.*)');
         final match = regex.matchAsPrefix(lineBefore);
+
         if (match == null) {
           return tev;
         }
+
+        final listItemBody = match.group(2);
         final indent = match.group(1);
 
+        if (listItemBody == null || listItemBody.isEmpty) {
+          return tev.trimBeforeCursor(listChar.length + (indent?.length ?? 1));
+        }
+
         return tev.append('$indent$listChar ');
       }
 
       TextEditingValue orderedListContinuation(
           String afterNumberChar, TextEditingValue tev) {
         final regex =
-            RegExp(r'(\s*)(\d+)' '${RegExp.escape(afterNumberChar)} ');
+            RegExp(r'(\s*)(\d+)' '${RegExp.escape(afterNumberChar)} (.*)');
         final match = regex.matchAsPrefix(lineBefore);
+
         if (match == null) {
           return tev;
         }
-        final indent = match.group(1);
-        final number = int.tryParse(match.group(2)!) ?? 0 + 1;
 
+        final listItemBody = match.group(3)!;
+        final indent = match.group(1)!;
+        final numberStr = match.group(2)!;
+
+        if (listItemBody.isEmpty) {
+          return tev.trimBeforeCursor(
+              indent.length + numberStr.length + afterNumberChar.length + 1);
+        }
+
+        final number = (int.tryParse(match.group(2)!) ?? 0) + 1;
         return tev.append('$indent$number$afterNumberChar ');
       }
 
-      newVal = unorderedListContinuation('-', newVal);
-      newVal = unorderedListContinuation('*', newVal);
-      newVal = unorderedListContinuation('+', newVal);
-      newVal = orderedListContinuation('.', newVal);
-      newVal = orderedListContinuation(')', newVal);
+      for (final c in unorderedListTypes) {
+        newVal = unorderedListContinuation(c, newVal);
+      }
+      for (final c in orderedListTypes) {
+        newVal = orderedListContinuation(c, newVal);
+      }
     }
 
     return newVal;

lib/pages/create_post/create_post.dart

@@ -142,17 +142,11 @@ class CreatePostPage extends HookWidget {
                 ),
               ),
             ),
-            SafeArea(
-              child: Column(
-                mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                children: [
-                  const Spacer(),
-                  EditorToolbar(
-                    editorFocusNode: editorFocusNode,
-                    controller: bodyController,
-                    instanceHost: context.read<CreatePostStore>().instanceHost,
-                  ),
-                ],
+            BottomSticky(
+              child: EditorToolbar(
+                editorFocusNode: editorFocusNode,
+                controller: bodyController,
+                instanceHost: context.read<CreatePostStore>().instanceHost,
               ),
             ),
           ],

lib/pages/manage_account.dart

@@ -384,19 +384,13 @@ class _ManageAccount extends HookWidget {
             const BottomSafe(),
           ],
         ),
-        SafeArea(
-          child: Column(
-            mainAxisAlignment: MainAxisAlignment.spaceBetween,
-            children: [
-              const Spacer(),
-              EditorToolbar(
-                editorFocusNode: bioFocusNode,
-                controller: bioController,
-                instanceHost: user.instanceHost,
-              ),
-            ],
+        BottomSticky(
+          child: EditorToolbar(
+            editorFocusNode: bioFocusNode,
+            controller: bioController,
+            instanceHost: user.instanceHost,
           ),
-        ),
+        )
       ],
     );
   }

lib/widgets/editor/editor.dart

@@ -52,22 +52,18 @@ class Editor extends HookWidget {
       );
     }
 
-    return FocusScope(
-      child: Focus(
-        focusNode: focusNode,
-        child: TextField(
-          controller: actualController,
-          autofocus: autofocus,
-          keyboardType: TextInputType.multiline,
-          textCapitalization: TextCapitalization.sentences,
-          onChanged: onChanged,
-          onSubmitted: onSubmitted,
-          maxLines: maxLines,
-          minLines: minLines,
-          decoration: InputDecoration(labelText: labelText),
-          inputFormatters: [MarkdownFormatter()],
-        ),
-      ),
+    return TextField(
+      focusNode: focusNode,
+      controller: actualController,
+      autofocus: autofocus,
+      keyboardType: TextInputType.multiline,
+      textCapitalization: TextCapitalization.sentences,
+      onChanged: onChanged,
+      onSubmitted: onSubmitted,
+      maxLines: maxLines,
+      minLines: minLines,
+      decoration: InputDecoration(labelText: labelText),
+      inputFormatters: [MarkdownFormatter()],
     );
   }
 }

lib/widgets/editor/editor_toolbar.dart

@@ -42,52 +42,73 @@ enum HeaderLevel {
 class EditorToolbar extends HookWidget {
   final TextEditingController controller;
   final String instanceHost;
-  final EditorToolbarStore store;
   final FocusNode editorFocusNode;
   static const _height = 50.0;
 
-  EditorToolbar({
+  const EditorToolbar({
     required this.controller,
     required this.instanceHost,
     required this.editorFocusNode,
-  }) : store = EditorToolbarStore(instanceHost);
+  });
 
   @override
   Widget build(BuildContext context) {
-    final visible = useState(editorFocusNode.hasFocus);
-    useEffect(() {
-      editorFocusNode.addListener(() {
-        visible.value = editorFocusNode.hasFocus;
-      });
-
-      return;
-    }, [editorFocusNode]);
+    final visible = useListenable(editorFocusNode).hasFocus;
 
     return MobxProvider(
-      create: (context) => store,
-      child: AsyncStoreListener(
-        asyncStore: store.imageUploadState,
-        child: visible.value
-            ? Container(
-                height: _height,
-                width: double.infinity,
-                color: Theme.of(context).cardColor,
-                child: Material(
-                  child: SingleChildScrollView(
-                    scrollDirection: Axis.horizontal,
-                    child: _ToolbarBody(
-                      controller: controller,
-                      instanceHost: instanceHost,
+      create: (context) => EditorToolbarStore(instanceHost),
+      child: ObserverBuilder<EditorToolbarStore>(builder: (context, store) {
+        return AsyncStoreListener(
+          asyncStore: store.imageUploadState,
+          child: AnimatedSwitcher(
+            duration: kThemeAnimationDuration,
+            transitionBuilder: (child, animation) {
+              final offsetAnimation =
+                  Tween<Offset>(begin: const Offset(0, 1.5), end: Offset.zero)
+                      .animate(animation);
+
+              return SlideTransition(
+                position: offsetAnimation,
+                child: child,
+              );
+            },
+            child: visible
+                ? Container(
+                    height: _height,
+                    width: double.infinity,
+                    color: Theme.of(context).canvasColor,
+                    child: SingleChildScrollView(
+                      scrollDirection: Axis.horizontal,
+                      child: _ToolbarBody(
+                        controller: controller,
+                        instanceHost: instanceHost,
+                      ),
                     ),
-                  ),
-                ),
-              )
-            : const SizedBox.shrink(),
-      ),
+                  )
+                : const SizedBox.shrink(),
+          ),
+        );
+      }),
     );
   }
 
-  static Widget safeArea = const SizedBox(height: _height);
+  static const safeArea = SizedBox(height: _height);
+}
+
+class BottomSticky extends StatelessWidget {
+  final Widget child;
+  const BottomSticky({required this.child});
+
+  @override
+  Widget build(BuildContext context) => SafeArea(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          children: [
+            const Spacer(),
+            child,
+          ],
+        ),
+      );
 }
 
 class _ToolbarBody extends HookWidget {
@@ -224,12 +245,21 @@ class _ToolbarBody extends HookWidget {
           onPressed: () {
             final line = controller.firstSelectedLine;
 
-            if (line.startsWith('* ')) {
-              controller.removeAtBeginningOfEverySelectedLine('* ');
-            } else if (line.startsWith('- ')) {
-              controller.removeAtBeginningOfEverySelectedLine('- ');
-            } else {
-              controller.insertAtBeginningOfEverySelectedLine('- ');
+            // if theres a list in place, remove it
+            final listRemoved = () {
+              for (final c in unorderedListTypes) {
+                if (line.startsWith('$c ')) {
+                  controller.removeAtBeginningOfEverySelectedLine('$c ');
+                  return true;
+                }
+              }
+              return false;
+            }();
+
+            // if no list, then let's add one
+            if (!listRemoved) {
+              controller.insertAtBeginningOfEverySelectedLine(
+                  '${unorderedListTypes.last} ');
             }
           },
           icon: const Icon(Icons.format_list_bulleted),
@@ -263,11 +293,15 @@ class _ToolbarBody extends HookWidget {
         IconButton(
           onPressed: () {
             controller.reformat((selection) {
-              final insides = selection.isNotEmpty ? selection : '___';
+              const textBeg = '\n::: spoiler spoiler\n';
+              final textMid = selection.isNotEmpty ? selection : '___';
+              const textEnd = '\n:::\n';
+
               return _Reformat(
-                text: '\n::: spoiler spoiler\n$insides\n:::\n',
-                selectionBeginningShift: 21,
-                selectionEndingShift: 21 + insides.length - selection.length,
+                text: textBeg + textMid + textEnd,
+                selectionBeginningShift: textBeg.length,
+                selectionEndingShift:
+                    textBeg.length + textMid.length - selection.length,
               );
             });
           },

lib/widgets/write_comment.dart

@@ -137,17 +137,11 @@ class WriteComment extends HookWidget {
               EditorToolbar.safeArea,
             ],
           ),
-          SafeArea(
-            child: Column(
-              mainAxisAlignment: MainAxisAlignment.spaceBetween,
-              children: [
-                const Spacer(),
-                EditorToolbar(
-                  editorFocusNode: editorFocusNode,
-                  controller: controller,
-                  instanceHost: post.instanceHost,
-                ),
-              ],
+          BottomSticky(
+            child: EditorToolbar(
+              editorFocusNode: editorFocusNode,
+              controller: controller,
+              instanceHost: post.instanceHost,
             ),
           ),
         ],