fix: 修改文本颜色未使用问题

core/renderer.py

@@ -179,8 +179,9 @@ class ExcelRenderer:
         current_font = self._get_font(is_bold, font_size)
         
         # Font color
-        font_color_hex = cell.font.color.rgb if (cell.font and cell.font.color) else None
-        text_color = self._parse_color(font_color_hex, default=(0, 0, 0))
+        # Excel's Color object can be complex. We pass the whole object to _parse_color.
+        font_color_obj = cell.font.color if (cell.font and cell.font.color) else None
+        text_color = self._parse_color(font_color_obj, default=(0, 0, 0))
 
         # Alignment
         h_align = cell.alignment.horizontal if (cell.alignment and cell.alignment.horizontal) else 'left'
@@ -189,15 +190,44 @@ class ExcelRenderer:
         # Text rendering with simple truncation
         self._draw_text(draw, text, x1, y1, x2, y2, current_font, text_color, h_align, v_align, font_size)
 
-    def _parse_color(self, color_code, default=(0, 0, 0)) -> Tuple[int, int, int]:
-        if not color_code or color_code == '00000000' or not isinstance(color_code, str):
+    def _parse_color(self, color_obj, default=(0, 0, 0)) -> Tuple[int, int, int]:
+        """
+        Parse Excel color object to RGB tuple.
+        """
+        if not color_obj:
             return default
             
-        # Handle ARGB (Excel often uses this)
+        color_code = None
+        
+        # If it's a string, treat as hex
+        if isinstance(color_obj, str):
+            color_code = color_obj
+        # If it's a Color object
+        elif hasattr(color_obj, 'type'):
+             if color_obj.type == 'rgb':
+                 color_code = color_obj.rgb
+             elif color_obj.type == 'theme':
+                 # Use hardcoded common theme colors as a fallback for MVP
+                 # Theme 0: Light 1 (White) - FFFFFF
+                 # Theme 1: Dark 1 (Black) - 000000
+                 # Theme 2: Light 2 (EEECE1)
+                 # Theme 3: Dark 2 (1F497D)
+                 if color_obj.theme == 0:
+                     color_code = "FFFFFFFF" # White
+                 elif color_obj.theme == 1:
+                     color_code = "FF000000" # Black
+                 else:
+                     # Attempt to check if rgb is populated even for theme
+                     if hasattr(color_obj, 'rgb') and color_obj.rgb:
+                         color_code = color_obj.rgb
+        elif hasattr(color_obj, 'rgb'):
+             color_code = color_obj.rgb
+        
+        if not color_code or color_code == '00000000':
+             return default
+        
+        # Handle ARGB
         if len(color_code) > 6:
-            # Strip alpha if present (usually first 2 chars for ARGB)
-            # Example: FF000000 -> 000000 (Black), FFFFFFFF -> FFFFFF (White)
-            # Note: This is a simplification.
              if color_code.startswith('FF') or len(color_code) == 8:
                  color_code = color_code[2:]
         

tests/test_font_color.py

@@ -0,0 +1,36 @@
+import pytest
+import io
+import os
+from core.renderer import ExcelRenderer
+from PIL import Image
+
+# Use the file provided by the user for reproduction
+TEST_FILE_PATH = "tests/kshj_gt1767081783800.xlsx"
+
+@pytest.mark.skipif(not os.path.exists(TEST_FILE_PATH), reason="Test file not found")
+def test_font_color_rendering_real_file():
+    """
+    Test rendering with a real file that has font color issues.
+    This test will generate an output image for visual inspection.
+    """
+    with open(TEST_FILE_PATH, "rb") as f:
+        content = f.read()
+    
+    renderer = ExcelRenderer(content)
+    
+    try:
+        # Render the first sheet (or specific sheet if known, default to active)
+        img_bytes = renderer.render_to_bytes()
+        
+        # Save for visual inspection
+        output_path = "tests/test_output_font_color.png"
+        with open(output_path, "wb") as f_out:
+            f_out.write(img_bytes)
+            
+        print(f"Generated test image at: {os.path.abspath(output_path)}")
+        
+        assert isinstance(img_bytes, bytes)
+        assert len(img_bytes) > 0
+        
+    except Exception as e:
+        pytest.fail(f"Rendering failed: {e}")