rn 0.54 ios compatibility

Author: iyegoroff

android/src/main/java/iyegoroff/RNTextGradient/Linear/RNShadowLinearTextGradient.java

@@ -19,7 +19,7 @@ public class RNShadowLinearTextGradient extends RNShadowTextGradient {
   private float[] mStart;
   private float[] mEnd;
 
-  @ReactProp(name = "start")
+  @ReactProp(name = "gradientStart")
   public void setStart(ReadableArray start) {
     if (start != null) {
       mStart = new float[] {
@@ -31,7 +31,7 @@ public void setStart(ReadableArray start) {
     }
   }
 
-  @ReactProp(name = "end")
+  @ReactProp(name = "gradientEnd")
   public void setEnd(ReadableArray end) {
     if (end != null) {
       mEnd = new float[] {

ios/RNGradientValue.h

@@ -0,0 +1,12 @@
+#import "RNLinearTextGradientShadowViewDelegate.h"
+#import "RCTBaseTextShadowView.h"
+
+@interface RNLinearGradientUtils : NSObject
+
++ (UIColor *)gradientWithFrame:(CGRect)frame
+                    shadowView:(RCTBaseTextShadowView <RNLinearTextGradientShadowViewDelegate> *)shadowView;
+
++ (NSDictionary *)gradientComparisonKey:(CGRect)frame
+                             shadowView:(RCTBaseTextShadowView <RNLinearTextGradientShadowViewDelegate> *)shadowView;
+
+@end

ios/RNLinearGradientUtils.h

@@ -0,0 +1,63 @@
+#import "RNLinearGradientUtils.h"
+
+// based on this: https://github.com/ViccAlexander/Chameleon/blob/master/Pod/Classes/Objective-C/UIColor%2BChameleon.m
+
+@implementation RNLinearGradientUtils
+
++ (UIColor *)gradientWithFrame:(CGRect)frame
+                    shadowView:(RCTBaseTextShadowView <RNLinearTextGradientShadowViewDelegate> *)shadowView
+{
+  NSMutableArray *cgColors = [[NSMutableArray alloc] init];
+  for (UIColor *color in [shadowView colors]) {
+    [cgColors addObject:(id)[color CGColor]];
+  }
+  
+  CGSize contextSize = CGSizeMake(frame.size.width + frame.origin.x,
+                                  frame.size.height + frame.origin.y);
+  UIGraphicsBeginImageContextWithOptions(contextSize, NO, [UIScreen mainScreen].scale);
+  
+  //Default to the RGB Colorspace
+  CGColorSpaceRef myColorspace = CGColorSpaceCreateDeviceRGB();
+  CFArrayRef arrayRef = (__bridge CFArrayRef)cgColors;
+  
+  NSUInteger locationsCount = [[shadowView locations] count];
+  CGFloat locations[locationsCount];
+  for (int i = 0; i < locationsCount; ++i) {
+    locations[i] = [[shadowView locations] objectAtIndex:i].floatValue;
+  }
+  
+  //Create our Fradient
+  CGGradientRef myGradient = CGGradientCreateWithColors(myColorspace, arrayRef, locations);
+  
+  CGPoint start = CGPointMake([shadowView gradientStart].x * frame.size.width + frame.origin.x,
+                              [shadowView gradientStart].y * frame.size.height + frame.origin.y);
+  CGPoint end = CGPointMake([shadowView gradientEnd].x * frame.size.width + frame.origin.x,
+                            [shadowView gradientEnd].y * frame.size.height + frame.origin.y);
+  
+  // Draw our Gradient
+  CGContextDrawLinearGradient(UIGraphicsGetCurrentContext(),
+                              myGradient,
+                              start,
+                              end,
+                              kCGGradientDrawsAfterEndLocation);
+  // Grab it as an Image
+  UIImage *backgroundColorImage = UIGraphicsGetImageFromCurrentImageContext();
+  
+  // Clean up
+  CGColorSpaceRelease(myColorspace); // Necessary?
+  CGGradientRelease(myGradient); // Necessary?
+  UIGraphicsEndImageContext();
+  return [UIColor colorWithPatternImage:backgroundColorImage];
+}
+
++ (NSDictionary *)gradientComparisonKey:(CGRect)frame
+                             shadowView:(RCTBaseTextShadowView <RNLinearTextGradientShadowViewDelegate> *)shadowView
+{
+  return @{@"locations": [shadowView locations] ?: @[],
+           @"colors": [shadowView colors] ?: @[],
+           @"start": [NSValue valueWithCGPoint:[shadowView gradientStart]],
+           @"end": [NSValue valueWithCGPoint:[shadowView gradientEnd]],
+           @"frame": [NSValue valueWithCGRect:frame]};
+}
+
+@end

ios/RNLinearGradientUtils.m

@@ -0,0 +1,9 @@
+#import "RNLinearTextGradientShadowViewDelegate.h"
+#import "RNTextGradientShadowView.h"
+
+@interface RNLinearTextGradientShadowView : RNTextGradientShadowView <RNLinearTextGradientShadowViewDelegate>
+
+@property (nonatomic, assign) CGPoint gradientStart;
+@property (nonatomic, assign) CGPoint gradientEnd;
+
+@end

ios/RNLinearTextGradientManager.h

@@ -0,0 +1,16 @@
+#import "RNLinearGradientUtils.h"
+#import "RNLinearTextGradientShadowView.h"
+
+@implementation RNLinearTextGradientShadowView
+
+- (UIColor *)gradientWithFrame:(CGRect)frame
+{
+  return [RNLinearGradientUtils gradientWithFrame:frame shadowView:self];
+}
+
+- (NSDictionary *)gradientComparisonKey:(CGRect)frame
+{
+  return [RNLinearGradientUtils gradientComparisonKey:frame shadowView:self];
+}
+
+@end

ios/RNLinearTextGradientManager.m

@@ -0,0 +1,13 @@
+#import "RNTextGradientShadowViewDelegate.h"
+
+#ifndef RNLinearTextGradientShadowViewDelegate_h
+#define RNLinearTextGradientShadowViewDelegate_h
+
+@protocol RNLinearTextGradientShadowViewDelegate <RNTextGradientShadowViewDelegate>
+
+- (CGPoint)gradientStart;
+- (CGPoint)gradientEnd;
+
+@end
+
+#endif /* RNLinearTextGradientShadowViewDelegate_h */

ios/RNLinearTextGradientShadowView.h

@@ -0,0 +1,5 @@
+#import "RNTextGradientViewManager.h"
+
+@interface RNLinearTextGradientViewManager : RNTextGradientViewManager
+
+@end