Hopefully fix some weirdness on tab completeion where it would read the entire screen instead of suggested tab completions.

src/fenrirscreenreader/core/tabCompletionManager.py

@@ -132,13 +132,6 @@ class TabCompletionManager:
         if candidate_text:
             return self._clean_text(candidate_text)
 
-        delta_text = self.env["screen"]["new_delta"]
-        if (
-            delta_text
-            and not self.env["screen"].get("new_delta_is_typing", False)
-        ):
-            return self._clean_text(delta_text)
-
         return ""
 
     def _get_cursor_line_inserted_text(
@@ -184,26 +177,19 @@ class TabCompletionManager:
         return "".join(inserted_parts)
 
     def _get_candidate_text(self, old_lines, new_lines, cursor_y):
-        if len(old_lines) != len(new_lines):
-            return self._get_inserted_lines(old_lines, new_lines, cursor_y)
-
-        changed_lines = []
         old_cursor_line = (
             old_lines[cursor_y].strip() if cursor_y < len(old_lines) else ""
         )
-        for index, old_line in enumerate(old_lines):
+        return self._get_inserted_lines(
-            if index == cursor_y:
+            old_lines,
-                continue
+            new_lines,
-            if index < len(new_lines) and old_line != new_lines[index]:
+            self.env["screen"]["new_cursor"]["y"],
-                if new_lines[index].strip() == old_cursor_line:
+            old_cursor_line,
-                    continue
-                changed_lines.append(new_lines[index])
-
-        return "\n".join(
-            line.rstrip() for line in changed_lines if line.strip()
         )
 
-    def _get_inserted_lines(self, old_lines, new_lines, cursor_y):
+    def _get_inserted_lines(
+        self, old_lines, new_lines, new_cursor_y, old_cursor_line
+    ):
         matcher = difflib.SequenceMatcher(
             None, old_lines, new_lines, autojunk=False
         )
@@ -217,10 +203,15 @@ class TabCompletionManager:
         ) in matcher.get_opcodes():
             if tag not in ["insert", "replace"]:
                 continue
-            if new_end <= cursor_y:
+            if new_start > new_cursor_y:
+                continue
+            if tag == "replace" and any(
+                line.strip() for line in old_lines[old_start:old_end]
+            ):
                 continue
             for line in new_lines[new_start:new_end]:
-                if line.strip():
+                stripped_line = line.strip()
+                if stripped_line and stripped_line != old_cursor_line:
                     inserted_lines.append(line.rstrip())
         return "\n".join(inserted_lines)
 

src/fenrirscreenreader/fenrirVersion.py

@@ -4,5 +4,5 @@
 # Fenrir TTY screen reader
 # By Chrys, Storm Dragon, and contributors.
 
-version = "2026.05.29"
+version = "2026.05.30"
 code_name = "testing"

tests/unit/test_tab_completion_manager.py

@@ -140,6 +140,93 @@ def test_candidate_list_speaks_visible_list_without_cursor_advance():
     assert manager.process_update() == "Documents/ Downloads/"
 
 
+@pytest.mark.unit
+def test_full_screen_scroll_speaks_only_inserted_candidate_list():
+    old_text = "\n".join(
+        [
+            "old top".ljust(30),
+            "old middle".ljust(30),
+            "old lower".ljust(30),
+            "old bottom".ljust(30),
+            "$ ./Toby".ljust(30),
+        ]
+    )
+    manager, env, _input_manager = _build_env(old_text, {"x": 8, "y": 4})
+
+    manager.capture_if_tab()
+    _set_screen_update(
+        env,
+        "\n".join(
+            [
+                "old middle".ljust(30),
+                "old lower".ljust(30),
+                "old bottom".ljust(30),
+                "TobyAccMod_V10-0.pk3 TobyConfig.ini".ljust(30),
+                "$ ./Toby".ljust(30),
+            ]
+        ),
+        {"x": 8, "y": 4},
+        delta="\n".join(
+            [
+                "old middle",
+                "old lower",
+                "old bottom",
+                "TobyAccMod_V10-0.pk3 TobyConfig.ini",
+                "$ ./Toby",
+            ]
+        ),
+    )
+
+    assert manager.process_update() == "TobyAccMod_V10-0.pk3 TobyConfig.ini"
+
+
+@pytest.mark.unit
+def test_same_height_repaint_without_inserted_candidates_stays_silent():
+    old_text = "\n".join(
+        [
+            "old top".ljust(30),
+            "old middle".ljust(30),
+            "old lower".ljust(30),
+            "$ ./Toby".ljust(30),
+        ]
+    )
+    manager, env, _input_manager = _build_env(old_text, {"x": 8, "y": 3})
+
+    manager.capture_if_tab()
+    _set_screen_update(
+        env,
+        "\n".join(
+            [
+                "status line".ljust(30),
+                "old prompt history".ljust(30),
+                "unrelated output".ljust(30),
+                "$ ./Toby".ljust(30),
+            ]
+        ),
+        {"x": 8, "y": 3},
+        delta="status line\nold prompt history\nunrelated output\n$ ./Toby",
+    )
+
+    assert manager.process_update() == ""
+
+
+@pytest.mark.unit
+def test_recent_tab_does_not_speak_delta_without_detected_completion():
+    old_text = "\n".join(["$ ./Toby".ljust(20), "".ljust(20)])
+    manager, env, _input_manager = _build_env(old_text, {"x": 8, "y": 0})
+
+    manager.capture_if_tab()
+    _set_screen_update(
+        env,
+        old_text,
+        {"x": 8, "y": 0},
+        delta="old unrelated screen content\n$ ./Toby",
+    )
+
+    assert manager.process_update() == ""
+    assert env["commandBuffer"]["tabCompletion"]["pending"] is not None
+
+
 @pytest.mark.unit
 def test_no_screen_change_stays_silent_and_keeps_pending_briefly():
     manager, env, _input_manager = _build_env(