opt dyn/reply text menu

Signed-off-by: dom <githubaccount56556@proton.me>

lib/utils/extension/editable_text_ext.dart

@@ -0,0 +1,38 @@
+import 'package:PiliPlus/utils/extension/iterable_ext.dart';
+import 'package:PiliPlus/utils/page_utils.dart';
+import 'package:flutter/material.dart';
+
+extension EditableTextExt on EditableTextState {
+  void addLaunchMenuIfNeeded(
+    List<ContextMenuButtonItem> buttonItems, {
+    required int index,
+  }) {
+    final selection = textEditingValue.selection;
+    if (!selection.isCollapsed) {
+      buttonItems.insertOrAdd(
+        index,
+        ContextMenuButtonItem(
+          label: '打开',
+          onPressed: () {
+            hideToolbar();
+            clearSelection(selection);
+            PageUtils.launchURL(
+              selection.textInside(textEditingValue.text).trim(),
+            );
+          },
+        ),
+      );
+    }
+  }
+
+  void clearSelection(TextSelection currSelection) {
+    widget.controller.selection = .collapsed(offset: currSelection.end);
+  }
+
+  void clearSelectionIfNeeded() {
+    final selection = textEditingValue.selection;
+    if (!selection.isCollapsed) {
+      clearSelection(selection);
+    }
+  }
+}