Fix drilldown 'fakely' splitted charts

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed 
+
+- Fix drilldown regroup strategy on fake-split charts.
+
 ## [0.13.0] - 2024-09-13
 
 ### Fixed

src/chart/options/options.cpp

@@ -98,6 +98,13 @@ std::optional<ChannelId> Options::secondaryStackType() const
 	return std::nullopt;
 }
 
+bool Options::isStacked() const
+{
+	auto dims = stackChannel().dimensions();
+	dims.split_by(mainAxis().dimensions());
+	return !dims.empty();
+}
+
 Channels Options::shadowChannels() const
 {
 	auto shadow = channels.shadow();
@@ -122,12 +129,11 @@ void Options::drilldownTo(const Options &other)
 {
 	auto &stackChannel = this->stackChannel();
 
+	if (this->split && !isSplit()) this->split = false;
+
 	for (auto &&dim : other.getChannels().getDimensions())
 		if (!getChannels().isSeriesUsed(dim))
 			stackChannel.addSeries(dim);
-	if (stackChannel.isDimension()
-	    && geometry == ShapeType::rectangle)
-		this->align = Base::Align::Type::stretch;
 }
 
 void Options::intersection(const Options &other)
@@ -192,9 +198,9 @@ bool Options::sameShadowAttribs(const Options &other) const
 
 	return shape == shapeOther && coordSystem == other.coordSystem
 	    && angle == other.angle && orientation == other.orientation
-	    && split == other.split && dataFilter == other.dataFilter
-	    && align == other.align && sort == other.sort
-	    && reverse == other.reverse;
+	    && isSplit() == other.isSplit()
+	    && dataFilter == other.dataFilter && align == other.align
+	    && sort == other.sort && reverse == other.reverse;
 }
 
 bool Options::sameAttributes(const Options &other) const

src/chart/options/options.h

@@ -109,6 +109,18 @@ class Options
 		return channels.at(stackChannelType());
 	}
 
+	[[nodiscard]] const Channel &stackChannel() const
+	{
+		return channels.at(stackChannelType());
+	}
+
+	[[nodiscard]] bool isStacked() const;
+	[[nodiscard]] bool isSplit() const
+	{
+		return split
+		    && (stackChannelType() != subAxisType() || isStacked());
+	}
+
 	Heading title{std::nullopt};
 	Heading subtitle{std::nullopt};
 	Heading caption{std::nullopt};

test/e2e/test_cases/test_cases.json

@@ -3236,7 +3236,7 @@
 			"refs": ["bd104b0"]
 		},
 		"web_content/cookbook/style/dark_theme": {
-			"refs": ["f7c42b8"]
+			"refs": ["b23128f"]
 		},
 		"web_content/cookbook/style/highligh_markers": {
 			"refs": ["54fc3d3"]

test/e2e/tests/fixes.json

@@ -7,6 +7,9 @@
 		"91": {
 			"refs": ["1732a49"]
 		},
+		"143": {
+			"refs": ["4396a67"]
+		},
 		"144": {
 			"refs": ["fde02e4"]
 		},

test/e2e/tests/fixes/143.mjs

@@ -0,0 +1,42 @@
+const testSteps = [
+	(chart) => {
+		const data = {
+			series: [
+				{
+					name: 'Colors',
+					type: 'dimension',
+					values: ['red', 'green', 'blue', 'red', 'green', 'blue', 'red', 'green', 'blue']
+				},
+				{
+					name: 'Letters',
+					type: 'dimension',
+					values: ['a', 'a', 'a', 'b', 'b', 'b', 'c', 'c', 'c']
+				},
+				{
+					name: 'Val',
+					type: 'measure',
+					values: [3, 5, 4, 3 + 1, 5 + 1, 4 + 1, 3 + 2, 5 + 2, 4 + 2]
+				}
+			]
+		}
+
+		return chart.animate({
+			data,
+			config: {
+				y: 'Colors',
+				x: 'Val'
+			}
+		})
+	},
+	(chart) =>
+		chart.animate(
+			{
+				y: 'Val',
+				x: 'Letters',
+				split: true
+			},
+			{ regroupStrategy: 'drilldown' }
+		)
+]
+
+export default testSteps