@codecademy/gamut

72.5.172.5.2-alpha.319fdb.0
dist/Card/styles.js
~dist/Card/styles.jsModified
+59−55
Index: package/dist/Card/styles.js
===================================================================
--- package/dist/Card/styles.js
+++ package/dist/Card/styles.js
@@ -1,8 +1,28 @@
 import { theme, timingValues, variant } from '@codecademy/gamut-styles';
+import { useTheme } from '@emotion/react';
+
+/**
+ * The theme's elevation scale is flattened to dashcase tokens (`rest-shadow`,
+ * `hoverMirrored-transform`, ...), so per-state groups don't exist on the
+ * theme at runtime. This regroups one state's tokens into a spreadable style
+ * object, mapping the `shadow` token onto the `boxShadow` property
+ * framer-motion animates.
+ */
+const getElevationStyles = (elevation, state) => ({
+  boxShadow: elevation[`${state}-shadow`],
+  transform: elevation[`${state}-transform`]
+});
 const SHADOW_OFFSET = 8;
 const SHADOW_OFFSET_INITIAL = 6;
-const TRANSFORM_OFFSET = 4;
+const REST_TRANSITION = {
+  duration: timingValues.fast / 1000,
+  ease: 'easeOut'
+};
+const HOVER_TRANSITION = {
+  duration: timingValues.fast / 1000,
+  ease: 'easeIn'
+};
 export const cardVariants = variant({
   defaultVariant: 'default',
   base: {
     color: 'text'
@@ -55,59 +75,43 @@
       ease: 'easeIn'
     }
   }
 };
-export const hoverShadowLeft = borderRadius => ({
-  initial: {
-    boxShadow: `0px 0px 0 ${theme.colors['shadow-primary']}`,
-    borderRadius,
-    transition: {
-      duration: timingValues.fast / 1000,
-      ease: 'easeOut'
+
+/**
+ * Motion variants for a Card's hover elevation, read from the active theme's
+ * `elevation` scale so each theme controls its own shadow and lift.
+ * `patternRight` cards cast their shadow on the opposite side, so they use the
+ * `hoverMirrored` tokens.
+ */
+export const useCardElevation = (shadow, borderRadius) => {
+  const {
+    elevation
+  } = useTheme();
+  const hoverState = shadow === 'patternRight' ? 'hoverMirrored' : 'hover';
+  return {
+    initial: {
+      ...getElevationStyles(elevation, 'rest'),
+      borderRadius,
+      transition: REST_TRANSITION
+    },
+    // outline variants keep their bespoke two-layer shadow but share the
+    // elevation scale's transforms
+    initialOutline: {
+      ...getElevationStyles(elevation, 'rest'),
+      boxShadow: `-${SHADOW_OFFSET_INITIAL}px ${SHADOW_OFFSET_INITIAL}px 0 0px ${theme.colors['background-current']}, -${SHADOW_OFFSET_INITIAL}px ${SHADOW_OFFSET_INITIAL}px 0 1px ${theme.colors['border-primary']}`,
+      borderRadius,
+      transition: REST_TRANSITION
+    },
+    animate: {
+      ...getElevationStyles(elevation, hoverState),
+      borderRadius,
+      transition: HOVER_TRANSITION
+    },
+    animateOutline: {
+      ...getElevationStyles(elevation, 'hover'),
+      boxShadow: `-${SHADOW_OFFSET}px ${SHADOW_OFFSET}px 0 0px ${theme.colors['shadow-primary']}, -${SHADOW_OFFSET}px ${SHADOW_OFFSET}px 0 1px ${theme.colors['shadow-primary']}`,
+      borderRadius,
+      transition: HOVER_TRANSITION
     }
-  },
-  initialOutline: {
-    boxShadow: `-${SHADOW_OFFSET_INITIAL}px ${SHADOW_OFFSET_INITIAL}px 0 0px ${theme.colors['background-current']}, -${SHADOW_OFFSET_INITIAL}px ${SHADOW_OFFSET_INITIAL}px 0 1px ${theme.colors['border-primary']}`,
-    borderRadius,
-    transition: {
-      duration: timingValues.fast / 1000,
-      ease: 'easeOut'
-    }
-  },
-  animate: {
-    transform: `translate(${TRANSFORM_OFFSET}px, -${TRANSFORM_OFFSET}px)`,
-    boxShadow: `-${SHADOW_OFFSET}px ${SHADOW_OFFSET}px 0 ${theme.colors['shadow-primary']}`,
-    borderRadius,
-    transition: {
-      duration: timingValues.fast / 1000,
-      ease: 'easeIn'
-    }
-  },
-  animateOutline: {
-    transform: `translate(${TRANSFORM_OFFSET}px, -${TRANSFORM_OFFSET}px)`,
-    boxShadow: `-${SHADOW_OFFSET}px ${SHADOW_OFFSET}px 0 0px ${theme.colors['shadow-primary']}, -${SHADOW_OFFSET}px ${SHADOW_OFFSET}px 0 1px ${theme.colors['shadow-primary']}`,
-    borderRadius,
-    transition: {
-      duration: timingValues.fast / 1000,
-      ease: 'easeIn'
-    }
-  }
-});
-export const hoverShadowRight = borderRadius => ({
-  initial: {
-    boxShadow: `0px 0px 0 ${theme.colors['shadow-primary']}`,
-    borderRadius,
-    transition: {
-      duration: timingValues.fast / 1000,
-      ease: 'easeOut'
-    }
-  },
-  animate: {
-    transform: `translate(-${TRANSFORM_OFFSET}px, -${TRANSFORM_OFFSET}px)`,
-    boxShadow: `${SHADOW_OFFSET}px ${SHADOW_OFFSET}px 0 ${theme.colors['shadow-primary']}`,
-    borderRadius,
-    transition: {
-      duration: timingValues.fast / 1000,
-      ease: 'easeIn'
-    }
-  }
-});
\ No newline at end of file
+  };
+};
\ No newline at end of file