Add OSD support for angle of attack

Author: haslinghuis

locales/en/messages.json

@@ -5728,6 +5728,14 @@
         "message": "Custom message 4 from external device",
         "description": "Description of the custom message 4 element of the OSD"
     },
+    "osdTextElementAngleOfAttack": {
+        "message": "Angle of attack",
+        "description": "One of the elements of the OSD"
+    },
+    "osdDescElementAngleOfAttack": {
+        "message": "Angle of attack",
+        "description": "Description of the angle of attack element of the OSD"
+    },
     "osdTextElementOnTime": {
         "message": "On time",
         "description": "One of the elements of the OSD"

src/js/tabs/osd.js

@@ -84,6 +84,7 @@ SYM.loadSymbols = function () {
     SYM.ROLL = 0x14;
     SYM.KM = 0x7d;
     SYM.MILES = 0x7e;
+    SYM.ANGLE_OF_ATTACK = 0x40;
 };
 
 FONT.initData = function () {
@@ -1575,6 +1576,15 @@ OSD.loadDisplayFields = function () {
             positionable: true,
             preview: "CUSTOM MSG4",
         },
+        ANGLE_OF_ATTACK: {
+            name: "ANGLE_OF_ATTACK",
+            text: "osdTextElementAngleOfAttack",
+            desc: "osdDescElementAngleOfAttack",
+            defaultPosition: -1,
+            draw_order: 610,
+            positionable: true,
+            preview: `${FONT.symbol(SYM.ANGLE_OF_ATTACK)}-00.0`,
+        },
     };
 
     if (semver.gte(FC.CONFIG.apiVersion, API_VERSION_1_47) && have_sensor(FC.CONFIG.activeSensors, "gps")) {
@@ -2015,6 +2025,7 @@ OSD.chooseFields = function () {
             F.CUSTOM_MSG1,
             F.CUSTOM_MSG2,
             F.CUSTOM_MSG3,
+            F.ANGLE_OF_ATTACK,
         ]);
     }
     // Choose statistic fields