fix src-layout problems and add syntax heighlight

Author: 15r10nk

mutmut/__main__.py

@@ -266,7 +266,8 @@ def create_mutants_for_file(filename, output_path):
             exit(1)
 
     source_file_mutation_data = SourceFileMutationData(path=filename)
-    module_name = str(filename)[:-len(filename.suffix)].replace(os.sep, '.')
+
+    module_name = strip_prefix(str(filename),prefix="src/")[:-len(filename.suffix)].replace(os.sep, '.')
     source_file_mutation_data.exit_code_by_key = {
          '.'.join([module_name, x]).replace('.__init__.', '.'): None
         for x in mutant_names
@@ -1067,7 +1068,7 @@ def collect_source_file_mutation_data(*, mutant_names):
         source_file_mutation_data_by_path[str(path)] = m
 
     mutants = [
-        (m, mutant_name, result)
+        (m, mutant_name.replace("src.",""), result)
         for path, m in source_file_mutation_data_by_path.items()
         for mutant_name, result in m.exit_code_by_key.items()
     ]
@@ -1446,7 +1447,9 @@ def browse():
     from textual.containers import Container
     from textual.widgets import Footer
     from textual.widgets import DataTable
-    from textual.widgets import TextArea
+    from textual.widgets import Static
+    from textual.widget import Widget
+    from rich.syntax import Syntax
 
     class ResultBrowser(App):
         loading_id = None
@@ -1473,7 +1476,8 @@ def compose(self):
             with Container(classes='container'):
                 yield DataTable(id='files')
                 yield DataTable(id='mutants')
-            yield TextArea(id='diff_view')
+            with Widget(id="diff_view_widget"):
+                yield Static(id='diff_view')
             yield Footer()
 
         def on_mount(self):
@@ -1532,19 +1536,19 @@ def on_data_table_row_highlighted(self, event):
                 assert event.data_table.id == 'mutants'
                 diff_view = self.query_one('#diff_view')
                 if event.row_key.value is None:
-                    diff_view.text = ''
+                    diff_view.update('')
                 else:
-                    diff_view.text = '<loading...>'
+                    diff_view.update('<loading...>')
                     self.loading_id = event.row_key.value
 
                     def load_thread():
                         read_config()
                         try:
                             d = get_diff_for_mutant(event.row_key.value)
                             if event.row_key.value == self.loading_id:
-                                diff_view.text = d
+                                diff_view.update(Syntax(d,"diff"))
                         except Exception as e:
-                            diff_view.text = f'<{type(e)} {e}>'
+                            diff_view.update(f'<{type(e)} {e}>')
 
                     t = Thread(target=load_thread)
                     t.start()

mutmut/result_browser_layout.tcss

@@ -24,3 +24,12 @@ DataTable:focus .datatable--cursor {
     color: black;
     background: orange;
 }
+
+#diff_view_widget{
+    height: 50%;
+ border: solid;
+ overflow-y: scroll;
+}
+
+#diff_view{
+}