fix margins

.github/workflows/pythonpackage.yml

@@ -21,6 +21,17 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+
+        # Python 3.9 is on macos-13 but not macos-latest (macos-14-arm64)
+        # https://github.com/actions/setup-python/issues/696#issuecomment-1637587760
+        exclude:
+          - { python-version: "3.8", os: "macos-latest" }
+          - { python-version: "3.9", os: "macos-latest" }
+          - { python-version: "3.11", os: "macos-latest" }
+        include:
+          - { python-version: "3.8", os: "macos-13" }
+          - { python-version: "3.9", os: "macos-13" }
+          - { python-version: "3.11", os: "macos-13" }
     defaults:
       run:
         shell: bash
@@ -32,18 +43,18 @@ jobs:
         uses: actions/[email protected]
         with:
           python-version: ${{ matrix.python-version }}
-          cache: 'poetry'
+          cache: "poetry"
       - name: Install dependencies
         run: poetry install --no-interaction --extras syntax
         if: ${{ matrix.python-version != '3.12' }}
-      - name: Install dependencies for 3.12  # https://github.com/Textualize/textual/issues/3491#issuecomment-1854156476
+      - name: Install dependencies for 3.12 # https://github.com/Textualize/textual/issues/3491#issuecomment-1854156476
         run: poetry install --no-interaction
         if: ${{ matrix.python-version == '3.12' }}
       - name: Test with pytest
         run: |
           poetry run pytest tests -v --cov=./src/textual --cov-report=xml:./coverage.xml --cov-report term-missing
         if: ${{ matrix.python-version != '3.12' }}
-      - name: Test with pytest for 3.12  # https://github.com/Textualize/textual/issues/3491#issuecomment-1854156476
+      - name: Test with pytest for 3.12 # https://github.com/Textualize/textual/issues/3491#issuecomment-1854156476
         run: |
           poetry run pytest tests -v --cov=./src/textual --cov-report=xml:./coverage.xml --cov-report term-missing -m 'not syntax'
         if: ${{ matrix.python-version == '3.12' }}

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Fixed
 
 - Fixed `TextArea` to end mouse selection only if currently selecting https://github.com/Textualize/textual/pull/4436
+- Fixed issue with margins https://github.com/Textualize/textual/pull/4441
 
 ### Changed
 

src/textual/layouts/horizontal.py

@@ -38,7 +38,7 @@ def arrange(
                     ]
                 )
                 + (box_margins[0].left + box_margins[-1].right),
-                min(
+                max(
                     [
                         margin_top + margin_bottom
                         for margin_top, _, margin_bottom, _ in box_margins

src/textual/layouts/vertical.py

@@ -29,7 +29,7 @@ def arrange(
         ]
         if box_margins:
             resolve_margin = Size(
-                min(
+                max(
                     [
                         margin_right + margin_left
                         for _, margin_right, _, margin_left in box_margins

src/textual/widget.py

@@ -1233,9 +1233,11 @@ def get_content_width(self, container: Size, viewport: Size) -> int:
         Returns:
             The optimal width of the content.
         """
+
         if self.is_container:
             assert self._layout is not None
-            return self._layout.get_content_width(self, container, viewport)
+            width = self._layout.get_content_width(self, container, viewport)
+            return width
 
         cache_key = container.width
         if self._content_width_cache[0] == cache_key:

tests/snapshot_tests/snapshot_apps/margin_multiple.py

@@ -0,0 +1,43 @@
+from textual.app import App, ComposeResult
+from textual.containers import Container, ScrollableContainer, Horizontal
+from textual.widgets import Label
+
+
+class CompoundWidget(ScrollableContainer):
+    DEFAULT_CSS = """
+    #inner {
+        width: 1fr;
+        background: $panel;
+        align: center middle;
+        margin: 5;
+        border: green;
+
+    }
+
+    Label {
+        border: double yellow;
+    }
+    """
+
+    def compose(self) -> ComposeResult:
+        yield Label("foo")
+        with Container(id="inner"):
+            yield Label("bar")
+
+
+class MyApp(App):
+    CSS = """
+    #widget2 > Label {
+        display: none;
+    }
+
+    """
+
+    def compose(self) -> ComposeResult:
+        with Horizontal():
+            yield CompoundWidget(id="widget1")
+            yield CompoundWidget(id="widget2")
+
+
+if __name__ == "__main__":
+    MyApp().run()

tests/snapshot_tests/test_snapshots.py

@@ -1236,7 +1236,7 @@ def test_example_pride(snap_compare):
     """Test the pride example."""
     assert snap_compare(EXAMPLES_DIR / "pride.py")
 
-    
+
 def test_button_with_console_markup(snap_compare):
     """Regression test for https://github.com/Textualize/textual/issues/4328"""
     assert snap_compare(SNAPSHOT_APPS_DIR / "button_markup.py")
@@ -1249,3 +1249,7 @@ def test_width_100(snap_compare):
 
 def test_button_with_multiline_label(snap_compare):
     assert snap_compare(SNAPSHOT_APPS_DIR / "button_multiline_label.py")
+
+
+def test_margin_multiple(snap_compare):
+    assert snap_compare(SNAPSHOT_APPS_DIR / "margin_multiple.py")