Gradient Part 5b: Fix gradients in math (#2604)

2 files changed, 68 insertions, 0 deletions

diff --git a/tests/ref/visualize/gradient-math.png b/tests/ref/visualize/gradient-math.png
new file mode 100644
index 00000000..13185bec
--- /dev/null
+++ b/tests/ref/visualize/gradient-math.png
diff --git a/tests/typ/visualize/gradient-math.typ b/tests/typ/visualize/gradient-math.typ
new file mode 100644
index 00000000..2030ecbb
--- /dev/null
+++ b/tests/typ/visualize/gradient-math.typ
@@ -0,0 +1,68 @@
+// Test that gradients are applied correctly on equations.
+
+---
+// Test on cancel
+#show math.equation: set text(fill: gradient.linear(..color.map.rainbow))
+#show math.equation: box
+
+$ a dot cancel(5) = cancel(25) 5 x + cancel(5) 1 $
+
+---
+// Test on frac
+#show math.equation: set text(fill: gradient.linear(..color.map.rainbow))
+#show math.equation: box
+
+$ nabla dot bold(E) = frac(rho, epsilon_0) $
+
+---
+// Test on root
+#show math.equation: set text(fill: gradient.linear(..color.map.rainbow))
+#show math.equation: box
+
+$ x_"1,2" = frac(-b +- sqrt(b^2 - 4 a c), 2 a) $
+
+---
+// Test on matrix
+#show math.equation: set text(fill: gradient.linear(..color.map.rainbow))
+#show math.equation: box
+
+$ A = mat(
+  1, 2, 3;
+  4, 5, 6;
+  7, 8, 9
+) $
+
+---
+// Test on underover
+#show math.equation: set text(fill: gradient.linear(..color.map.rainbow))
+#show math.equation: box
+
+$ underline(X^2) $
+$ overline("hello, world!") $
+
+---
+// Test a different direction
+#show math.equation: set text(fill: gradient.linear(..color.map.rainbow, dir: ttb))
+#show math.equation: box
+
+$ A = mat(
+  1, 2, 3;
+  4, 5, 6;
+  7, 8, 9
+) $
+
+$ x_"1,2" = frac(-b +- sqrt(b^2 - 4 a c), 2 a) $
+
+---
+// Test miscelaneous
+
+#show math.equation: set text(fill: gradient.linear(..color.map.rainbow))
+#show math.equation: box
+
+$ hat(x) = bar x bar = vec(x, y, z) = tilde(x) = dot(x) $
+$ x prime = vec(1, 2, delim: "[") $
+$ sum_(i in NN) 1 + i $
+$ attach(
+  Pi, t: alpha, b: beta,
+  tl: 1, tr: 2+3, bl: 4+5, br: 6,
+) $