Fix text appearing outside axis scale range

scottshambaugh · scottshambaugh · commit 0d3ef72816b2 · 2026-02-02T16:12:56.000-07:00
diff --git a/lib/matplotlib/artist.py b/lib/matplotlib/artist.py
@@ -375,6 +375,24 @@ def get_window_extent(self, renderer=None):
         """
         return Bbox([[0, 0], [0, 0]])
 
+    def _in_axes_domain(self, x, y):
+        """
+        Check if the data point (x, y) is within the valid domain of the axes
+        scales.
+
+        Returns True if no axes or if the point is in the valid domain.
+        """
+        ax = self.axes
+        if ax is None:
+            return True
+        for val, axis in [(x, ax.xaxis), (y, ax.yaxis)]:
+            if axis.get_scale() == 'linear':
+                continue
+            vmin, vmax = axis.limit_range_for_scale(val, val)
+            if vmin != val or vmax != val:
+                return False
+        return True
+
     def get_tightbbox(self, renderer=None):
         """
         Get the artist's bounding box in display space, taking clipping into account.
diff --git a/lib/matplotlib/tests/test_text.py b/lib/matplotlib/tests/test_text.py
@@ -1226,3 +1226,15 @@ def test_ytick_rotation_mode():
         tick.set_rotation(angle)
 
     plt.subplots_adjust(left=0.4, right=0.6, top=.99, bottom=.01)
+
+
+def test_text_tightbbox_outside_scale_domain():
+    # Test that text at positions outside the valid domain of axes scales
+    # (e.g., negative coordinates with log scale) returns a null bbox.
+    fig, ax = plt.subplots()
+    ax.set_yscale('log')
+    ax.set_ylim(1, 100)
+
+    invalid_text = ax.text(0, -5, 'invalid')
+    invalid_bbox = invalid_text.get_tightbbox(fig.canvas.get_renderer())
+    assert not np.isfinite(invalid_bbox.width)
diff --git a/lib/matplotlib/text.py b/lib/matplotlib/text.py
@@ -1060,6 +1060,16 @@ def get_window_extent(self, renderer=None, dpi=None):
             bbox = bbox.translated(x, y)
             return bbox
 
+    def get_tightbbox(self, renderer=None):
+        if not self.get_visible() or self.get_text() == "":
+            return Bbox.null()
+        # Exclude text at positions outside the valid domain of the axes
+        # scales (e.g., negative coordinates with a log scale).
+        if (self.axes is not None and self.get_transform() == self.axes.transData
+                and not self._in_axes_domain(*self.get_unitless_position())):
+            return Bbox.null()
+        return super().get_tightbbox(renderer)
+
     def set_backgroundcolor(self, color):
         """
         Set the background color of the text.
