fix: letterSpacing fixes

Author: farfromrefug

src/canvas.android.ts

@@ -206,7 +206,7 @@ class ProxyClass<T> {
                     }
                 }
                 const result = target.handleCustomMethods(target, native, methodName, args);
-                if (result) {
+                if (result !== undefined) {
                     return result;
                 }
                 return native[methodName](...args);
@@ -268,8 +268,6 @@ class Canvas extends ProxyClass<android.graphics.Canvas> {
         } else if (methodName === 'drawView') {
             drawViewOnCanvas(native, args[0], args[1]);
             return true;
-        } else if (methodName === 'setLetterSpacing' && sdkVersion() < 21) {
-            return true;
         }
     }
     getImage() {
@@ -323,6 +321,10 @@ export class Paint extends ProxyClass<android.graphics.Paint> {
             }
             this.mNeedsFontUpdate = true;
             return this.mFontInternal;
+        } else if (methodName === 'setLetterSpacing' && sdkVersion() < 21) {
+            return true;
+        } else if (methodName === 'getLetterSpacing' && sdkVersion() < 21) {
+            return 0;
         }
     }
     setFont(font: Font) {
@@ -345,6 +347,12 @@ export class Paint extends ProxyClass<android.graphics.Paint> {
     set font(font: Font) {
         this.setFont(font);
     }
+    get letterSpacing() {
+        return this['getLetterSpacing']();
+    }
+    set letterSpacing(spacing: number) {
+        this['setLetterSpacing'](spacing);
+    }
     getFontFamily() {
         return this.font.fontFamily;
     }

src/canvas.d.ts

@@ -27,13 +27,17 @@ export class Paint {
     strokeJoin: Join;
     style: Style;
     textSize: number;
+    letterSpacing: number;
     fontFamily: string;
     fontWeight: FontWeight;
     fontStyle: FontStyle;
     font: Font;
     getFont(): Font;
     setFont(font: Font);
 
+    public setLetterSpacing(spacing: number);
+    public getLetterSpacing(): number;
+
     public getAlpha(): number;
     public getStyle(): Style;
     public setStrokeMiter(value: number): void;

src/canvas.ios.ts

@@ -857,7 +857,7 @@ export class Paint implements IPaint {
     antiAlias = true;
     dither;
     alpha = 255;
-    letterSpacing: number;
+    letterSpacing: number = 0;
     currentContext: any;
     shadowLayer?: {
         radius: number;
@@ -1236,7 +1236,7 @@ export class Paint implements IPaint {
             if (color) {
                 this.mTextAttribs.setObjectForKey(color, NSForegroundColorAttributeName);
             }
-            if (this.letterSpacing !== undefined) {
+            if (this.letterSpacing !== 0) {
                 this.mTextAttribs.setObjectForKey(this.letterSpacing * iosFont.pointSize, NSKernAttributeName);
             }
             if (this.align === Align.CENTER) {