feat(context): Interactive Text Slice Highlighting with Fuzzy Anchors

src/gui_2.py

@@ -242,6 +242,7 @@ class App:
   self.ui_inspecting_ast_file = None
   self._cached_ast_nodes = []
   self._cached_ast_file_path = ''
+  self.ui_editing_slices_file = None
   """UI-level wrapper for approving a pending tool execution ask."""
   self._handle_approve_ask()
 
@@ -1259,7 +1260,37 @@ class App:
     imgui.set_next_window_size(imgui.ImVec2(900, 700), imgui.Cond_.first_use_ever)
     expanded, opened = imgui.begin(f"Text Viewer - {self.text_viewer_title}", self.show_text_viewer)
     self.show_text_viewer = bool(opened)
+    if not opened:
+     self.ui_editing_slices_file = None
+    
     if expanded:
+     if self.ui_editing_slices_file is not None:
+      imgui.text("Slice Management")
+      if imgui.button("Add Selection as Slice"):
+       selected = self._text_viewer_editor.get_selected_text()
+       if selected:
+        # Find line range
+        full = self.text_viewer_content
+        start_idx = full.find(selected)
+        if start_idx != -1:
+         end_idx = start_idx + len(selected)
+         s_line = full.count('\n', 0, start_idx) + 1
+         e_line = full.count('\n', 0, end_idx) + 1
+         from src.fuzzy_anchor import FuzzyAnchor
+         slice_data = FuzzyAnchor.create_slice(full, s_line, e_line)
+         self.ui_editing_slices_file.custom_slices.append(slice_data)
+      
+      # Render existing slices
+      to_remove = -1
+      for idx, slc in enumerate(self.ui_editing_slices_file.custom_slices):
+       imgui.text(f"Slice {idx+1}: Lines {slc['start_line']}-{slc['end_line']}")
+       imgui.same_line()
+       if imgui.button(f"Remove##slc{idx}"):
+        to_remove = idx
+      if to_remove != -1:
+       self.ui_editing_slices_file.custom_slices.pop(to_remove)
+      imgui.separator()
+
      # Toolbar
      if imgui.button("Copy"):
       imgui.set_clipboard_text(self.text_viewer_content)
@@ -1274,14 +1305,14 @@ class App:
       imgui.begin_child("tv_md_scroll", imgui.ImVec2(-1, -1), True)
       markdown_helper.render(self.text_viewer_content, context_id='text_viewer')
       imgui.end_child()
-     elif tv_type in renderer._lang_map:
+     elif tv_type in renderer._lang_map or self.ui_editing_slices_file is not None:
       if self._text_viewer_editor is None:
        self._text_viewer_editor = ced.TextEditor()
        self._text_viewer_editor.set_read_only_enabled(True)
        self._text_viewer_editor.set_show_line_numbers_enabled(True)
       
       # Sync text and language
-      lang_id = renderer._lang_map[tv_type]
+      lang_id = renderer._lang_map.get(tv_type, ced.TextEditor.LanguageDefinitionId.none)
       if self._text_viewer_editor.get_text().strip() != self.text_viewer_content.strip():
        self._text_viewer_editor.set_text(self.text_viewer_content)
       self._text_viewer_editor.set_language_definition(lang_id)
@@ -2710,6 +2741,15 @@ class App:
      if imgui.button(f"[Inspect]##{i}"):
       self.ui_inspecting_ast_file = f_item
       imgui.open_popup('AST Inspector')
+    
+    imgui.same_line()
+    if imgui.button(f"[Slices]##{i}"):
+     self.ui_editing_slices_file = f_item
+     f_path = f_item.path if hasattr(f_item, "path") else str(f_item)
+     self.text_viewer_title = f"Slices: {f_path}"
+     self.text_viewer_content = f_item.content or ""
+     self.text_viewer_type = 'cpp' if f_path.endswith(('.cpp', '.hpp', '.h')) else 'python' if f_path.endswith('.py') else 'text'
+     self.show_text_viewer = True
 
     imgui.table_set_column_index(1)
     if hasattr(f_item, "auto_aggregate"):