Merge pull request #2088 from Textualize/panel-heading-glitch

panel bug

rich/panel.py

@@ -1,14 +1,13 @@
-from typing import Optional, TYPE_CHECKING
+from typing import TYPE_CHECKING, Optional
-
-from .box import Box, ROUNDED
 
 from .align import AlignMethod
+from .box import ROUNDED, Box
 from .jupyter import JupyterMixin
 from .measure import Measurement, measure_renderables
 from .padding import Padding, PaddingDimensions
+from .segment import Segment
 from .style import StyleType
 from .text import Text, TextType
-from .segment import Segment
 
 if TYPE_CHECKING:
     from .console import Console, ConsoleOptions, RenderableType, RenderResult
@@ -183,7 +182,7 @@ class Panel(JupyterMixin):
         else:
             title_text.align(self.title_align, width - 4, character=box.top)
             yield Segment(box.top_left + box.top, border_style)
-            yield from console.render(title_text)
+            yield from console.render(title_text, child_options.update_width(width - 4))
             yield Segment(box.top + box.top_right, border_style)
 
         yield new_line
@@ -202,7 +201,9 @@ class Panel(JupyterMixin):
         else:
             subtitle_text.align(self.subtitle_align, width - 4, character=box.bottom)
             yield Segment(box.bottom_left + box.bottom, border_style)
-            yield from console.render(subtitle_text)
+            yield from console.render(
+                subtitle_text, child_options.update_width(width - 4)
+            )
             yield Segment(box.bottom + box.bottom_right, border_style)
 
         yield new_line
@@ -235,8 +236,8 @@ if __name__ == "__main__":  # pragma: no cover
 
     c = Console()
 
+    from .box import DOUBLE, ROUNDED
     from .padding import Padding
-    from .box import ROUNDED, DOUBLE
 
     p = Panel(
         "Hello, World!",

tests/test_panel.py

@@ -1,9 +1,12 @@
 import io
-from rich.console import Console
-from rich.panel import Panel
 
 import pytest
 
+from rich.console import Console
+from rich.panel import Panel
+from rich.segment import Segment
+from rich.style import Style
+
 tests = [
     Panel("Hello, World", padding=0),
     Panel("Hello, World", expand=False, padding=0),
@@ -52,6 +55,49 @@ def test_fixed_width():
     assert max_width == 20
 
 
+def test_render_size():
+    console = Console(width=63, height=46, legacy_windows=False)
+    options = console.options.update_dimensions(80, 4)
+    lines = console.render_lines(Panel("foo", title="Hello"), options=options)
+    print(repr(lines))
+    expected = [
+        [
+            Segment("╭─", Style()),
+            Segment(
+                "────────────────────────────────── Hello ───────────────────────────────────"
+            ),
+            Segment("─╮", Style()),
+        ],
+        [
+            Segment("│", Style()),
+            Segment(" ", Style()),
+            Segment("foo"),
+            Segment(
+                "                                                                         "
+            ),
+            Segment(" ", Style()),
+            Segment("│", Style()),
+        ],
+        [
+            Segment("│", Style()),
+            Segment(" ", Style()),
+            Segment(
+                "                                                                            ",
+                Style(),
+            ),
+            Segment(" ", Style()),
+            Segment("│", Style()),
+        ],
+        [
+            Segment(
+                "╰──────────────────────────────────────────────────────────────────────────────╯",
+                Style(),
+            )
+        ],
+    ]
+    assert lines == expected
+
+
 if __name__ == "__main__":
     expected = []
     for panel in tests: