Objective C builders support chaining style. (#202)

Author: staguer

LayoutKitObjCSampleApp/RotationLayout.h

@@ -7,7 +7,7 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 
 #import <UIKit/UIKit.h>
-#import <LayoutKitObjC/LayoutKitObjC-Swift.h>
+#import <LayoutKitObjC/LayoutKitObjC.h>
 
 @interface RotationLayout: NSObject <LOKLayout>
 

LayoutKitObjCSampleApp/RotationLayout.m

@@ -7,6 +7,7 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 
 #import <Foundation/Foundation.h>
+#import <LayoutKitObjC/LayoutKitObjC.h>
 
 #import "RotationLayout.h"
 

LayoutKitObjCSampleApp/ViewController.h

@@ -7,7 +7,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 
 #import <UIKit/UIKit.h>
-#import <LayoutKit/LayoutKit-Swift.h>
 
 @interface ViewController : UIViewController
 

LayoutKitObjCSampleApp/ViewController.m

@@ -68,9 +68,7 @@ - (void)viewDidLoad {
     collectionView.delegate = self.adapter;
     collectionView.dataSource = self.adapter;
 
-    LOKSizeLayoutBuilder *cellLayoutBuilder = [LOKSizeLayoutBuilder withSublayout:self.helloWorldLayout];
-    cellLayoutBuilder.width = self.view.bounds.size.width;
-    LOKSizeLayout *cellLayout = [cellLayoutBuilder build];
+    __auto_type cellLayout = [LOKSizeLayoutBuilder withSublayout:self.helloWorldLayout].withWidth(self.view.bounds.size.width).layout;
 
     NSArray *items = @[
                        cellLayout, cellLayout, cellLayout, cellLayout,
@@ -106,26 +104,31 @@ - (void)viewDidLayoutSubviews {
 }
 
 + (id<LOKLayout>)makeHelloLayout {
-    LOKLabelLayoutBuilder *labelLayoutBuilderA = [LOKLabelLayoutBuilder withString:@"Hello"];
-    labelLayoutBuilderA.viewClass = MyLabelView.class;
-    labelLayoutBuilderA.configure = ^(UIView * _Nonnull label) {
+    __auto_type labelLayoutA =
+    [LOKLabelLayoutBuilder withString:@"Hello"]
+    .withViewClass([MyLabelView class])
+    .withConfig(^(UIView * _Nonnull label) {
         label.backgroundColor = UIColor.whiteColor;
-    };
-    LOKLabelLayout *labelLayoutA = [labelLayoutBuilderA build];
-    LOKLabelLayoutBuilder *labelLayoutBuilderB = [LOKLabelLayoutBuilder withString:@"world!"];
-    labelLayoutBuilderB.viewClass = MyLabelView.class;
-    labelLayoutBuilderB.configure = ^(UIView * _Nonnull label) {
+    })
+    .layout;
+
+    __auto_type labelLayoutB = [LOKLabelLayoutBuilder withString:@"world!"]
+    .withViewClass([MyLabelView class])
+    .withConfig(^(UIView * _Nonnull label) {
         label.backgroundColor = UIColor.whiteColor;
-    };
-    LOKLabelLayout *labelLayoutB = [labelLayoutBuilderB build];
-    LOKStackLayoutBuilder *stackLayoutBuilder = [LOKStackLayoutBuilder withSublayouts:@[labelLayoutA, labelLayoutB]];
-    stackLayoutBuilder.axis = LOKAxisHorizontal;
-    stackLayoutBuilder.spacing = 10;
-    LOKInsetLayoutBuilder *insetLayoutBuilder = [LOKInsetLayoutBuilder withInsets:UIEdgeInsetsMake(20, 20, 20, 20) around:[stackLayoutBuilder build]];
-    insetLayoutBuilder.alignment = LOKAlignment.fill;
-    insetLayoutBuilder.viewClass = LabelBackgroundView.class;
-    insetLayoutBuilder.configure = ^(UIView * _Nonnull view) { };
-    return [[RotationLayout alloc] initWithSublayout:[insetLayoutBuilder build]
+    })
+    .layout;
+
+    __auto_type layout = [LOKStackLayoutBuilder withSublayouts:@[labelLayoutA, labelLayoutB]]
+    .withAxis(LOKAxisHorizontal)
+    .withSpacing(10)
+    .withInsets(UIEdgeInsetsMake(20, 20, 20, 20))
+    .withAlignment(LOKAlignment.fill)
+    .withViewClass(LabelBackgroundView.class)
+    .withConfig(^(UIView * _Nonnull view) { })
+    .layout;
+
+    return [[RotationLayout alloc] initWithSublayout:layout
                                            alignment:LOKAlignment.center
                                          viewReuseId:nil];
 }

Sources/LayoutKitObjC.h

@@ -15,6 +15,7 @@ FOUNDATION_EXPORT double LayoutKitObjCVersionNumber;
 FOUNDATION_EXPORT const unsigned char LayoutKitObjCVersionString[];
 
 // In this header, you should import all the public headers of your framework using statements like #import <LayoutKitObjC/PublicHeader.h>
+
 #import "LOKBaseLayoutBuilder.h"
 #if __has_include("LOKButtonLayoutBuilder.h")
 #import "LOKButtonLayoutBuilder.h"
@@ -29,3 +30,7 @@ FOUNDATION_EXPORT const unsigned char LayoutKitObjCVersionString[];
 #if __has_include("LOKTextViewLayoutBuilder.h")
 #import "LOKTextViewLayoutBuilder.h"
 #endif
+
+#if __has_include("LayoutKitObjC-Swift.h")
+#import "LayoutKitObjC-Swift.h"
+#endif

Sources/ObjCSupport/Builders/LOKBaseLayoutBuilder.h

@@ -23,6 +23,7 @@ typedef NSView View;
 @class LOKAlignment;
 @class LOKFlexibility;
 @protocol LOKLayout;
+@class LOKInsetLayoutBuilder;
 
 @interface LOKBaseLayoutBuilder : NSObject
 
@@ -34,4 +35,8 @@ typedef NSView View;
 
 - (nonnull id<LOKLayout>)build;
 
+@property (nonatomic, nonnull, readonly) LOKInsetLayoutBuilder * _Nonnull(^withInsets)(EdgeInsets);
+
+@property (nonatomic, nonnull) id<LOKLayout> layout;
+
 @end

Sources/ObjCSupport/Builders/LOKBaseLayoutBuilder.m

@@ -7,11 +7,23 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 
 #import "LOKBaseLayoutBuilder.h"
+#import "LOKInsetLayoutBuilder.h"
 
 @implementation LOKBaseLayoutBuilder
 
 - (id<LOKLayout>)build {
+    NSAssert(NO, @"This method is expected to be overridden by a superclass.");
     return nil;
 }
 
+- (id<LOKLayout>)layout {
+    return [self build];
+}
+
+- (LOKInsetLayoutBuilder * _Nonnull (^)(EdgeInsets))withInsets {
+    return ^LOKInsetLayoutBuilder *(EdgeInsets insets){
+        return [LOKInsetLayoutBuilder withInsets:insets around:[self build]];
+    };
+}
+
 @end

Sources/ObjCSupport/Builders/LOKButtonLayoutBuilder.h

@@ -30,6 +30,19 @@ typedef NS_ENUM(NSInteger, LOKButtonLayoutType) {
 @property (nonatomic) CGSize imageSize;
 @property (nonatomic, nullable) NSValue *contentEdgeInsets;
 
+@property (nonatomic, nonnull, readonly) LOKButtonLayoutBuilder * _Nonnull(^withType)(LOKButtonLayoutType);
+@property (nonatomic, nonnull, readonly) LOKButtonLayoutBuilder * _Nonnull(^withFont)(UIFont * _Nullable);
+@property (nonatomic, nonnull, readonly) LOKButtonLayoutBuilder * _Nonnull(^withImage)(UIImage * _Nullable);
+@property (nonatomic, nonnull, readonly) LOKButtonLayoutBuilder * _Nonnull(^withImageSize)(CGSize);
+@property (nonatomic, nonnull, readonly) LOKButtonLayoutBuilder * _Nonnull(^withContentEdgeInsets)(NSValue * _Nullable);
+
+@property (nonatomic, nonnull, readonly) LOKButtonLayoutBuilder * _Nonnull(^withAlignment)(LOKAlignment * _Nonnull);
+@property (nonatomic, nonnull, readonly) LOKButtonLayoutBuilder * _Nonnull(^withFlexibility)(LOKFlexibility * _Nonnull);
+@property (nonatomic, nonnull, readonly) LOKButtonLayoutBuilder * _Nonnull(^withViewReuseId)(NSString * _Nonnull);
+@property (nonatomic, nonnull, readonly) LOKButtonLayoutBuilder * _Nonnull(^withViewClass)(Class _Nonnull);
+
+@property (nonatomic, nonnull, readonly) LOKButtonLayoutBuilder * _Nonnull(^withConfig)( void(^ _Nonnull)(View *_Nonnull));
+
 - (nonnull LOKButtonLayout *)build;
 
 @end

Sources/ObjCSupport/Builders/LOKButtonLayoutBuilder.m

@@ -32,4 +32,74 @@ - (LOKButtonLayout *)build {
                                           config:self.configure];
 }
 
+- (LOKButtonLayoutBuilder * _Nonnull (^)(LOKButtonLayoutType))withType {
+    return ^LOKButtonLayoutBuilder *(LOKButtonLayoutType type){
+        self.type = type;
+        return self;
+    };
+}
+
+- (LOKButtonLayoutBuilder * _Nonnull (^)(UIFont * _Nullable))withFont {
+    return ^LOKButtonLayoutBuilder *(UIFont * font){
+        self.font = font;
+        return self;
+    };
+}
+
+- (LOKButtonLayoutBuilder * _Nonnull (^)(UIImage * _Nullable))withImage {
+    return ^LOKButtonLayoutBuilder *(UIImage * image){
+        self.image = image;
+        return self;
+    };
+}
+
+- (LOKButtonLayoutBuilder * _Nonnull (^)(CGSize))withImageSize {
+    return ^LOKButtonLayoutBuilder *(CGSize imageSize){
+        self.imageSize = imageSize;
+        return self;
+    };
+}
+
+- (LOKButtonLayoutBuilder * _Nonnull (^)(NSValue * _Nullable))withContentEdgeInsets {
+    return ^LOKButtonLayoutBuilder *(NSValue * _Nullable contentEdgeInsets){
+        self.contentEdgeInsets = contentEdgeInsets;
+        return self;
+    };
+}
+
+- (LOKButtonLayoutBuilder * _Nonnull (^)(LOKAlignment * _Nonnull))withAlignment {
+    return ^LOKButtonLayoutBuilder *(LOKAlignment * alignment){
+        self.alignment = alignment;
+        return self;
+    };
+}
+
+- (LOKButtonLayoutBuilder * _Nonnull (^)(LOKFlexibility * _Nonnull))withFlexibility {
+    return ^LOKButtonLayoutBuilder *(LOKFlexibility * flexibility){
+        self.flexibility = flexibility;
+        return self;
+    };
+}
+
+- (LOKButtonLayoutBuilder * _Nonnull (^)(NSString * _Nonnull))withViewReuseId {
+    return ^LOKButtonLayoutBuilder *(NSString * viewReuseId){
+        self.viewReuseId = viewReuseId;
+        return self;
+    };
+}
+
+- (LOKButtonLayoutBuilder * _Nonnull (^)(Class _Nonnull))withViewClass {
+    return ^LOKButtonLayoutBuilder *(Class viewClass){
+        self.viewClass = viewClass;
+        return self;
+    };
+}
+
+- (LOKButtonLayoutBuilder * _Nonnull (^)(void(^ _Nonnull)(View *_Nonnull)))withConfig {
+    return ^LOKButtonLayoutBuilder *(void(^ _Nonnull config)(View *_Nonnull)){
+        self.configure = config;
+        return self;
+    };
+}
+
 @end

Sources/ObjCSupport/Builders/LOKInsetLayoutBuilder.h

@@ -17,6 +17,13 @@
 @property (nonatomic) EdgeInsets insets;
 @property (nonatomic, nonnull) id<LOKLayout> sublayout;
 
+@property (nonatomic, nonnull, readonly) LOKInsetLayoutBuilder * _Nonnull(^withAlignment)(LOKAlignment * _Nonnull);
+@property (nonatomic, nonnull, readonly) LOKInsetLayoutBuilder * _Nonnull(^withFlexibility)(LOKFlexibility * _Nonnull);
+@property (nonatomic, nonnull, readonly) LOKInsetLayoutBuilder * _Nonnull(^withViewReuseId)(NSString * _Nonnull);
+@property (nonatomic, nonnull, readonly) LOKInsetLayoutBuilder * _Nonnull(^withViewClass)(Class _Nonnull);
+
+@property (nonatomic, nonnull, readonly) LOKInsetLayoutBuilder * _Nonnull(^withConfig)( void(^ _Nonnull)(View *_Nonnull));
+
 - (nonnull LOKInsetLayout *)build;
 
 @end