color fixes (#3936)

lib/elements/element.py

@@ -200,31 +200,30 @@ class EmbroideryElement(object):
             style = None
         return style
 
-    @property
-    @cache
-    def fill_color(self):
+    def _get_color(self, node, color_location, default=None):
         try:
-            color = self.node.get_computed_style("fill")
-        except (inkex.ColorError, ValueError):
-            # SVG spec says the default fill is black
-            # A color error could show up, when an element has an unrecognized color name
-            # A value error could show up, when for example when an element links to a non-existent gradient
-            # TODO: This will also apply to currentcolor and alike which will render in black
-            return "black"
-        return color
-
-    @property
-    @cache
-    def stroke_color(self):
-        try:
-            color = self.node.get_computed_style("stroke")
+            color = node.get_computed_style(color_location)
+            if isinstance(color, inkex.LinearGradient) and len(color.stops) == 1:
+                # Inkscape swatches set as a linear gradient with only one stop color
+                # Ink/Stitch should render the color correctly
+                color = self._get_color(color.stops[0], "stop-color", default)
         except (inkex.ColorError, ValueError):
             # A color error could show up, when an element has an unrecognized color name
             # A value error could show up, when for example when an element links to a non-existent gradient
             # TODO: This will also apply to currentcolor and alike which will not render
-            return None
+            color = default
         return color
 
+    @property
+    @cache
+    def fill_color(self):
+        return self._get_color(self.node, "fill", "black")
+
+    @property
+    @cache
+    def stroke_color(self):
+        return self._get_color(self.node, "stroke")
+
     @property
     @cache
     def stroke_scale(self):

lib/extensions/gradient_blocks.py

@@ -113,8 +113,11 @@ def gradient_shapes_and_attributes(element, shape, unit_multiplier):
     # e.g. url(#linearGradient872) -> linearGradient872
     gradient = element.gradient
     gradient.apply_transform()
-    point1 = (float(gradient.get('x1')), float(gradient.get('y1')))
-    point2 = (float(gradient.get('x2')), float(gradient.get('y2')))
+    # Note: when x and y are given in percentage within the svg file (which can happen in inkscape-non-native-files),
+    # gradient returns (0, 0) for both positions and will not render correctly.
+    # When the object is moved just once in inkscape, values are updated and this will work again.
+    point1 = (gradient.x1(), gradient.y1())
+    point2 = (gradient.x2(), gradient.y2())
     # get 90° angle to calculate the splitting angle
     transform = -Transform(get_correction_transform(element.node, child=True))
     line = DirectedLineSegment(transform.apply_to_point(point1), transform.apply_to_point(point2))
@@ -146,7 +149,7 @@ def gradient_shapes_and_attributes(element, shape, unit_multiplier):
         split_line = rotate(split_line, angle, origin=split_point, use_radians=True)
         offset_line = split_line.parallel_offset(1, 'right')
         polygon = split(shape, split_line)
-        color = verify_color(stop_styles[i]['stop-color'])
+        color = _get_and_verify_color(stop_styles, gradient, i)
         # does this gradient line split the shape
         offset_outside_shape = len(polygon.geoms) == 1
         for poly in polygon.geoms:
@@ -178,6 +181,15 @@ def gradient_shapes_and_attributes(element, shape, unit_multiplier):
     return polygons, attributes
 
 
+def _get_and_verify_color(stop_styles, gradient, iterator):
+    try:
+        color = verify_color(stop_styles[iterator]['stop-color'])
+    except KeyError:
+        color = gradient.stops[iterator].get_computed_style('stop-color')
+        stop_styles[iterator]['stop-color'] = color
+    return color
+
+
 def verify_color(color):
     try:
         Color(color)