more priority helpers, new animated example

@@ -463,6 +463,7 @@
 				DSTROOT = /tmp/Masonry.dst;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "Masonry/Masonry-Prefix.pch";
+				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 				OTHER_LDFLAGS = "-ObjC";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
@@ -476,6 +477,7 @@
 				DSTROOT = /tmp/Masonry.dst;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "Masonry/Masonry-Prefix.pch";
+				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 				OTHER_LDFLAGS = "-ObjC";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;

@@ -122,8 +122,8 @@
 
 #pragma mark - layout priority
 
-- (id<MASConstraint> (^)(UILayoutPriority))priority {
-    return ^id(UILayoutPriority priority) {
+- (id<MASConstraint> (^)(MASLayoutPriority))priority {
+    return ^id(MASLayoutPriority priority) {
         for (id<MASConstraint> constraint in self.currentChildConstraints) {
             constraint.priority(priority);
         }
@@ -131,6 +131,27 @@
     };
 }
 
+- (id<MASConstraint> (^)())priorityLow {
+    return ^id{
+        self.priority(MASLayoutPriorityDefaultLow);
+        return self;
+    };
+}
+
+- (id<MASConstraint> (^)())priorityMedium {
+    return ^id{
+        self.priority(MASLayoutPriorityDefaultMedium);
+        return self;
+    };
+}
+
+- (id<MASConstraint> (^)())priorityHigh {
+    return ^id{
+        self.priority(MASLayoutPriorityDefaultHigh);
+        return self;
+    };
+}
+
 #pragma mark - layout relation
 
 - (id<MASConstraint> (^)(id))equalityWithBlock:(id<MASConstraint> (^)(id<MASConstraint> constraint, id attr))block {

@@ -8,6 +8,15 @@
 
 #import <Foundation/Foundation.h>
 
+enum {
+    MASLayoutPriorityRequired = UILayoutPriorityRequired,
+    MASLayoutPriorityDefaultHigh = UILayoutPriorityDefaultHigh,
+    MASLayoutPriorityDefaultMedium = 500,
+    MASLayoutPriorityDefaultLow = UILayoutPriorityDefaultLow,
+    MASLayoutPriorityFittingSizeLevel = UILayoutPriorityFittingSizeLevel,
+};
+typedef float MASLayoutPriority;
+
 @protocol MASConstraint <NSObject>
 
 @property (nonatomic, copy, readonly) id<MASConstraint> (^insets)(UIEdgeInsets insets);
@@ -16,6 +25,9 @@
 @property (nonatomic, copy, readonly) id<MASConstraint> (^offset)(CGFloat offset);
 @property (nonatomic, copy, readonly) id<MASConstraint> (^percent)(CGFloat percent);
 @property (nonatomic, copy, readonly) id<MASConstraint> (^priority)(UILayoutPriority priority);
+@property (nonatomic, copy, readonly) id<MASConstraint> (^priorityLow)();
+@property (nonatomic, copy, readonly) id<MASConstraint> (^priorityMedium)();
+@property (nonatomic, copy, readonly) id<MASConstraint> (^priorityHigh)();
 @property (nonatomic, copy, readonly) id<MASConstraint> (^equal)(id attr);
 @property (nonatomic, copy, readonly) id<MASConstraint> (^greaterThanOrEqual)(id attr);
 @property (nonatomic, copy, readonly) id<MASConstraint> (^lessThanOrEqual)(id attr);

@@ -13,7 +13,7 @@
 @property (nonatomic, strong, readwrite) MASViewAttribute *secondViewAttribute;
 @property (nonatomic, strong) NSLayoutConstraint *layoutConstraint;
 @property (nonatomic, assign) NSLayoutRelation layoutRelation;
-@property (nonatomic, assign) UILayoutPriority layoutPriority;
+@property (nonatomic, assign) MASLayoutPriority layoutPriority;
 @property (nonatomic, assign) CGFloat layoutMultiplier;
 @property (nonatomic, assign) CGFloat layoutConstant;
 @property (nonatomic, assign) BOOL hasLayoutRelation;
@@ -27,7 +27,7 @@
     if (!self) return nil;
     
     _firstViewAttribute = firstViewAttribute;
-    self.layoutPriority = UILayoutPriorityRequired;
+    self.layoutPriority = MASLayoutPriorityRequired;
     self.layoutMultiplier = 1;
     
     return self;
@@ -141,8 +141,8 @@
 
 #pragma mark - layout priority
 
-- (id<MASConstraint> (^)(UILayoutPriority))priority {
-    return ^id(UILayoutPriority priority) {
+- (id<MASConstraint> (^)(MASLayoutPriority))priority {
+    return ^id(MASLayoutPriority priority) {
         NSAssert(!self.hasBeenCommitted,
                  @"Cannot modify constraint priority after it has been committed");
         
@@ -151,6 +151,27 @@
     };
 }
 
+- (id<MASConstraint> (^)())priorityLow {
+    return ^id{
+        self.priority(MASLayoutPriorityDefaultLow);
+        return self;
+    };
+}
+
+- (id<MASConstraint> (^)())priorityMedium {
+    return ^id{
+        self.priority(MASLayoutPriorityDefaultMedium);
+        return self;
+    };
+}
+
+- (id<MASConstraint> (^)())priorityHigh {
+    return ^id{
+        self.priority(MASLayoutPriorityDefaultHigh);
+        return self;
+    };
+}
+
 #pragma mark - layout relation
 
 - (void)setSecondViewAttribute:(id)secondViewAttribute {

@@ -19,6 +19,7 @@
 		DD52F254179CADC0005CD195 /* MASExampleSidesView.m in Sources */ = {isa = PBXBuildFile; fileRef = DD52F24E179CADC0005CD195 /* MASExampleSidesView.m */; };
 		DD52F255179CADC0005CD195 /* MASExampleViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = DD52F250179CADC0005CD195 /* MASExampleViewController.m */; };
 		DD52F26E179CBA05005CD195 /* libMasonry.a in Frameworks */ = {isa = PBXBuildFile; fileRef = DD52F26D179CBA05005CD195 /* libMasonry.a */; };
+		DDF3875C179D648D00178773 /* MASExampleAnimatedView.m in Sources */ = {isa = PBXBuildFile; fileRef = DDF3875B179D648D00178773 /* MASExampleAnimatedView.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -43,6 +44,8 @@
 		DD52F24F179CADC0005CD195 /* MASExampleViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MASExampleViewController.h; sourceTree = "<group>"; };
 		DD52F250179CADC0005CD195 /* MASExampleViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = MASExampleViewController.m; sourceTree = "<group>"; };
 		DD52F26D179CBA05005CD195 /* libMasonry.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = libMasonry.a; sourceTree = BUILT_PRODUCTS_DIR; };
+		DDF3875A179D648D00178773 /* MASExampleAnimatedView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MASExampleAnimatedView.h; sourceTree = "<group>"; };
+		DDF3875B179D648D00178773 /* MASExampleAnimatedView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = MASExampleAnimatedView.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -120,6 +123,8 @@
 				DD52F24A179CADC0005CD195 /* MASExampleConstantsView.m */,
 				DD52F24D179CADC0005CD195 /* MASExampleSidesView.h */,
 				DD52F24E179CADC0005CD195 /* MASExampleSidesView.m */,
+				DDF3875A179D648D00178773 /* MASExampleAnimatedView.h */,
+				DDF3875B179D648D00178773 /* MASExampleAnimatedView.m */,
 			);
 			name = Views;
 			sourceTree = "<group>";
@@ -205,6 +210,7 @@
 				DD52F253179CADC0005CD195 /* MASExampleListViewController.m in Sources */,
 				DD52F254179CADC0005CD195 /* MASExampleSidesView.m in Sources */,
 				DD52F255179CADC0005CD195 /* MASExampleViewController.m in Sources */,
+				DDF3875C179D648D00178773 /* MASExampleAnimatedView.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

+//
+//  MASExampleAnimatedView.h
+//  MasonryExamples
+//
+//  Created by Jonas Budelmann on 22/07/13.
+//  Copyright (c) 2013 Jonas Budelmann. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface MASExampleAnimatedView : UIView
+
+@end

+//
+//  MASExampleAnimatedView.m
+//  MasonryExamples
+//
+//  Created by Jonas Budelmann on 22/07/13.
+//  Copyright (c) 2013 Jonas Budelmann. All rights reserved.
+//
+
+#import "MASExampleAnimatedView.h"
+
+@interface MASExampleAnimatedView ()
+
+@property (nonatomic, strong) NSMutableArray *animatableConstraints;
+@property (nonatomic, assign) int padding;
+
+@end
+
+@implementation MASExampleAnimatedView
+
+- (id)init {
+    self = [super init];
+    if (!self) return nil;
+
+    UIView *view1 = UIView.new;
+    view1.backgroundColor = UIColor.greenColor;
+    view1.layer.borderColor = UIColor.blackColor.CGColor;
+    view1.layer.borderWidth = 2;
+    [self addSubview:view1];
+
+    UIView *view2 = UIView.new;
+    view2.backgroundColor = UIColor.redColor;
+    view2.layer.borderColor = UIColor.blackColor.CGColor;
+    view2.layer.borderWidth = 2;
+    [self addSubview:view2];
+
+    UIView *view3 = UIView.new;
+    view3.backgroundColor = UIColor.blueColor;
+    view3.layer.borderColor = UIColor.blackColor.CGColor;
+    view3.layer.borderWidth = 2;
+    [self addSubview:view3];
+
+    UIView *superview = self;
+    int padding = self.padding = 10;
+    UIEdgeInsets paddingInsets = UIEdgeInsetsMake(self.padding, self.padding, self.padding, self.padding);
+
+    self.animatableConstraints = NSMutableArray.new;
+
+    [view1 mas_buildConstraints:^(MASConstraintBuilder *constraints) {
+        [self.animatableConstraints addObjectsFromArray:@[
+         constraints.sides.equal(superview).insets(paddingInsets).priorityLow(),
+         constraints.bottom.equal(view3.mas_top).offset(-padding),
+         constraints.right.equal(view2.mas_left).offset(-padding),
+         ]];
+
+        constraints.size.equal(view2);
+        constraints.height.equal(view3.mas_height);
+    }];
+
+    [view2 mas_buildConstraints:^(MASConstraintBuilder *constraints) {
+        [self.animatableConstraints addObjectsFromArray:@[
+         constraints.sides.equal(superview).insets(paddingInsets).priorityLow(),
+         constraints.left.equal(view1.mas_right).offset(padding),
+         constraints.bottom.equal(view3.mas_top).offset(-padding),
+         ]];
+
+        constraints.size.equal(view1);
+        constraints.height.equal(view3.mas_height);
+    }];
+
+    [view3 mas_buildConstraints:^(MASConstraintBuilder *constraints) {
+        [self.animatableConstraints addObjectsFromArray:@[
+         constraints.sides.equal(superview).insets(paddingInsets).priorityLow(),
+         constraints.top.equal(view1.mas_bottom).offset(padding),
+         ]];
+
+        //TODO or pass an array
+        //constraints.height.equal(superview.subviews);
+        constraints.height.equal(view1.mas_height);
+        constraints.height.equal(view2.mas_height);
+    }];
+
+    UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didTapWithGestureRecognizer:)];
+    [self addGestureRecognizer:tapGestureRecognizer];
+
+    return self;
+}
+
+- (void)didTapWithGestureRecognizer:(UITapGestureRecognizer *)tapGestureRecognizer {
+    self.padding += 20;
+    UIEdgeInsets paddingInsets = UIEdgeInsetsMake(self.padding, self.padding, self.padding, self.padding);
+    for (id<MASConstraint> constraint in self.animatableConstraints) {
+        constraint.insets(paddingInsets);
+    }
+
+    [UIView animateWithDuration:0.4 animations:^{
+        [self layoutIfNeeded];
+    }];
+}
+
+@end
+

@@ -11,6 +11,7 @@
 #import "MASExampleBasicView.h"
 #import "MASExampleConstantsView.h"
 #import "MASExampleSidesView.h"
+#import "MASExampleAnimatedView.h"
 
 static NSString * const kMASCellReuseIdentifier = @"kMASCellReuseIdentifier";
 
@@ -32,6 +33,7 @@ static NSString * const kMASCellReuseIdentifier = @"kMASCellReuseIdentifier";
         [[MASExampleViewController alloc] initWithTitle:@"Basic" viewClass:MASExampleBasicView.class],
         [[MASExampleViewController alloc] initWithTitle:@"Using Constants" viewClass:MASExampleConstantsView.class],
         [[MASExampleViewController alloc] initWithTitle:@"Composite sides" viewClass:MASExampleSidesView.class],
+        [[MASExampleViewController alloc] initWithTitle:@"Basic Animated" viewClass:MASExampleAnimatedView.class],
     ];
     
     return self;

@@ -13,7 +13,7 @@
 
 @property (nonatomic, strong) NSLayoutConstraint *layoutConstraint;
 @property (nonatomic, assign) NSLayoutRelation layoutRelation;
-@property (nonatomic, assign) UILayoutPriority layoutPriority;
+@property (nonatomic, assign) MASLayoutPriority layoutPriority;
 @property (nonatomic, assign) CGFloat layoutMultiplier;
 @property (nonatomic, assign) CGFloat layoutConstant;
 @property (nonatomic, assign) BOOL hasLayoutRelation;