feat: Add markdown context actions for text input

assets/l10n/intl_en.arb

@@ -2806,5 +2806,11 @@
   "name": "Name",
   "version": "Version",
   "website": "Website",
-  "sendUncompressed": "Send uncompressed"
+  "sendUncompressed": "Send uncompressed",
+  "boldText": "Bold text",
+  "italicText": "Italic text",
+  "strikeThrough": "Strikethrough",
+  "pleaseFillOut": "Please fill out",
+  "invalidUrl": "Invalid url",
+  "addLink": "Add link"
 }

lib/pages/chat/input_bar.dart

@@ -9,6 +9,7 @@ import 'package:pasteboard/pasteboard.dart';
 import 'package:slugify/slugify.dart';
 
 import 'package:fluffychat/config/app_config.dart';
+import 'package:fluffychat/utils/markdown_context_builder.dart';
 import 'package:fluffychat/utils/platform_infos.dart';
 import 'package:fluffychat/widgets/mxc_image.dart';
 import '../../widgets/avatar.dart';
@@ -456,6 +457,8 @@ class InputBar extends StatelessWidget {
           builder: (context, controller, focusNode) => TextField(
             controller: controller,
             focusNode: focusNode,
+            contextMenuBuilder: (c, e) =>
+                markdownContextBuilder(c, e, controller),
             contentInsertionConfiguration: ContentInsertionConfiguration(
               onContentInserted: (KeyboardInsertedContent content) {
                 final data = content.data;

lib/utils/markdown_context_builder.dart

@@ -0,0 +1,102 @@
+import 'package:flutter/material.dart';
+
+import 'package:adaptive_dialog/adaptive_dialog.dart';
+import 'package:flutter_gen/gen_l10n/l10n.dart';
+
+Widget markdownContextBuilder(
+  BuildContext context,
+  EditableTextState editableTextState,
+  TextEditingController controller,
+) {
+  final value = editableTextState.textEditingValue;
+  final selectedText = value.selection.textInside(value.text);
+  final buttonItems = editableTextState.contextMenuButtonItems;
+  final l10n = L10n.of(context);
+
+  return AdaptiveTextSelectionToolbar.buttonItems(
+    anchors: editableTextState.contextMenuAnchors,
+    buttonItems: [
+      ...buttonItems,
+      if (selectedText.isNotEmpty) ...[
+        ContextMenuButtonItem(
+          label: l10n.link,
+          onPressed: () async {
+            final input = await showTextInputDialog(
+              context: context,
+              title: l10n.addLink,
+              okLabel: l10n.ok,
+              cancelLabel: l10n.cancel,
+              textFields: [
+                DialogTextField(
+                  validator: (text) {
+                    if (text == null || text.isEmpty) {
+                      return l10n.pleaseFillOut;
+                    }
+                    try {
+                      text.startsWith('http')
+                          ? Uri.parse(text)
+                          : Uri.https(text);
+                    } catch (_) {
+                      return l10n.invalidUrl;
+                    }
+                    return null;
+                  },
+                  hintText: 'www...',
+                  keyboardType: TextInputType.url,
+                ),
+              ],
+            );
+            final urlString = input?.singleOrNull;
+            if (urlString == null) return;
+            final url = urlString.startsWith('http')
+                ? Uri.parse(urlString)
+                : Uri.https(urlString);
+            final selection = controller.selection;
+            controller.text = controller.text.replaceRange(
+              selection.start,
+              selection.end,
+              '[$selectedText](${url.toString()})',
+            );
+            ContextMenuController.removeAny();
+          },
+        ),
+        ContextMenuButtonItem(
+          label: l10n.boldText,
+          onPressed: () {
+            final selection = controller.selection;
+            controller.text = controller.text.replaceRange(
+              selection.start,
+              selection.end,
+              '**$selectedText**',
+            );
+            ContextMenuController.removeAny();
+          },
+        ),
+        ContextMenuButtonItem(
+          label: l10n.italicText,
+          onPressed: () {
+            final selection = controller.selection;
+            controller.text = controller.text.replaceRange(
+              selection.start,
+              selection.end,
+              '*$selectedText*',
+            );
+            ContextMenuController.removeAny();
+          },
+        ),
+        ContextMenuButtonItem(
+          label: l10n.strikeThrough,
+          onPressed: () {
+            final selection = controller.selection;
+            controller.text = controller.text.replaceRange(
+              selection.start,
+              selection.end,
+              '~~$selectedText~~',
+            );
+            ContextMenuController.removeAny();
+          },
+        ),
+      ],
+    ],
+  );
+}