Harmonize parseSVGLengthList usage and naming. Probably requires api change in ios as well.

lib/extract/extractText.js

@@ -75,18 +75,20 @@ export function extractFont(props) {
     return _.defaults(ownedFont, font);
 }
 
-function parseDelta(delta) {
+function parseSVGLengthList(delta) {
     if (typeof delta === 'string') {
         return delta.trim().replace(commaReg, ' ').split(spaceReg);
     } else if (typeof delta === 'number') {
-        return [delta];
+        return [delta.toString()];
+    } else if (delta && typeof delta.map === 'function') {
+        return delta.map(d => `${d}`);
     } else {
         return [];
     }
 }
 
 export default function(props, container) {
-    const {
+    let {
         x,
         y,
         dx,
@@ -99,14 +101,15 @@ export default function(props, container) {
         textDecoration
     } = props;
 
+    let positionX = parseSVGLengthList(x);
+    let positionY = parseSVGLengthList(y);
+    const deltaX = parseSVGLengthList(dx);
+    const deltaY = parseSVGLengthList(dy);
+    rotate = parseSVGLengthList(rotate);
 
-    const deltaX = parseDelta(dx);
-    const deltaY = parseDelta(dy);
-    const rotates = parseDelta(rotate);
     let { children } = props;
     let content = null;
 
-
     if (typeof children === 'string' || typeof children === 'number') {
         const childrenString = children.toString();
         if (container) {
@@ -131,13 +134,13 @@ export default function(props, container) {
         font: extractFont(props),
         children,
         content,
+        positionX,
+        positionY,
+        rotate,
         deltaX,
         deltaY,
-        rotate: rotates,
         method,
         spacing,
         startOffset: (startOffset || 0).toString(),
-        positionX: _.isNil(x) ? null : x.toString(),
-        positionY: _.isNil(y) ? null : y.toString()
     };
 }