wrap and overflow

src/textual/content.py

@@ -313,7 +313,9 @@ def get_height(self, rules: Rules, width: int) -> int:
             A height in lines.
         """
         lines = self.without_spans._wrap_and_format(
-            width, no_wrap=rules.get("text_wrap") == "nowrap"
+            width,
+            overflow=rules.get("text_overflow"),
+            no_wrap=rules.get("text_wrap") == "nowrap",
         )
         return len(lines)
 
@@ -368,6 +370,10 @@ def get_span(y: int) -> tuple[int, int] | None:
                 content_line = FormattedLine(line, width, y=y, align=align)
                 offsets = divide_line(line.plain, width, fold=overflow == "fold")
                 divided_lines = content_line.content.divide(offsets)
+                if overflow == "ellipsis":
+                    divided_lines = [
+                        line.truncate(width, ellipsis=True) for line in divided_lines
+                    ]
                 new_lines = [
                     FormattedLine(
                         content.rstrip_end(width), width, offset, y, align=align

tests/snapshot_tests/test_snapshots.py

@@ -3385,3 +3385,31 @@ def compose(self) -> ComposeResult:
             yield Label(TEXT, id="label2")
 
     assert snap_compare(NoWrapApp())
+
+
+def test_overflow(snap_compare):
+    """Test overflow. You should see two labels across 4 lines. The first with overflow clip,
+    the second with overflow ellipsis."""
+
+    TEXT = "FOO " + "FOOBARBAZ" * 100
+
+    class OverflowApp(App):
+        CSS = """
+        Label {
+            max-width: 100vw;            
+        }
+        #label1 {
+            text-overflow: clip;
+            background: blue 20%;
+        }
+        #label2 {
+            text-overflow: ellipsis;
+            background: green 20%;
+        }
+        """
+
+        def compose(self) -> ComposeResult:
+            yield Label(TEXT, id="label1")
+            yield Label(TEXT, id="label2")
+
+    assert snap_compare(OverflowApp())