Make location indicator bearing a paint property

This change introduces a new property type, Rotation, that uses
a custom interpolator, and that is currently applied to
all style properties named "bearing", with a period attribute.

2 files changed, 35 insertions, 14 deletions

diff --git a/scripts/generate-style-code.js b/scripts/generate-style-code.js
index 08fd1fba19..c9191d59e1 100755
--- a/scripts/generate-style-code.js
+++ b/scripts/generate-style-code.js
@@ -64,6 +64,13 @@ global.evaluatedType = function (property) {
   case 'boolean':
     return 'bool';
   case 'number':
+    // TODO: Check if 'Rotation' should be used for other properties,
+    // such as icon-rotate
+    if (/bearing$/.test(property.name) &&
+        property.period == 360 &&
+        property.units =='degrees') {
+      return 'Rotation';
+    }
     return /location$/.test(property.name) ? 'double' : 'float';
   case 'resolvedImage':
       return 'expression::Image';
diff --git a/scripts/style-spec.js b/scripts/style-spec.js
index c0acbebd91..15a4c7e0dc 100644
--- a/scripts/style-spec.js
+++ b/scripts/style-spec.js
@@ -47,20 +47,6 @@ referenceSpec["layout_location-indicator"] = {
         },
         "doc": "The amount of the perspective compensation, between 0 and 1. A value of 1 produces a location indicator of constant width across the screen. A value of 0 makes it scale naturally according to the viewing projection."
     },
-    "bearing": {
-        "type": "number",
-        "default": "0",
-        "default": 0,
-        "period": 360,
-        "units": "degrees",
-        "property-type": "data-constant",
-        "expression": {
-            "interpolated": false,
-            "parameters": [ ]
-        },
-        "transition": false,
-        "doc": "The bearing of the location indicator."
-    },
     "image-tilt-displacement": {
         "type": "number",
         "property-type": "data-constant",
@@ -77,6 +63,20 @@ referenceSpec["layout_location-indicator"] = {
 };
 
 referenceSpec["paint_location-indicator"] = {
+    "bearing": {
+        "type": "number",
+        "default": "0",
+        "default": 0,
+        "period": 360,
+        "units": "degrees",
+        "property-type": "data-constant",
+        "expression": {
+            "interpolated": false,
+            "parameters": [ ]
+        },
+        "transition": false,
+        "doc": "The bearing of the location indicator."
+    },
     "location": {
         "type": "array",
         "default": [
@@ -176,6 +176,20 @@ referenceSpec["paint_location-indicator"] = {
         },
         "transition": true,
         "doc": "The color for drawing the accuracy radius border. To adjust transparency, set the alpha component of the color accordingly."
+    },
+    "bearing": {
+        "type": "number",
+        "default": "0",
+        "default": 0,
+        "period": 360,
+        "units": "degrees",
+        "property-type": "data-constant",
+        "expression": {
+            "interpolated": false,
+            "parameters": [ ]
+        },
+        "transition": false,
+        "doc": "The bearing of the location indicator."
     }
 };