components/Banner/examples/supplemental/MDCBannerViewLayout.m - external/github.com/material-components/material-components-ios - Git at Google

 // Copyright 2018-present the Material Components for iOS authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 // http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #import <UIKit/UIKit.h>

 #import "MDCBannerView.h"
 #import "MDCBannerViewLayout.h"

 static const CGFloat kLeadingPadding = 16.0f;
 static const CGFloat kTrailingPadding = 8.0f;
 static const CGFloat kTopPaddingSmall = 10.0f;
 static const CGFloat kTopPaddingLarge = 24.0f;
 static const CGFloat kBottomPadding = 8.0f;
 static const CGFloat kButtonHorizontalIntervalSpace = 8.0f;
 static const CGFloat kButtonVerticalIntervalSpace = 8.0f;
 static const CGFloat kSpaceBetweenIconImageAndTextLabel = 16.0f;
 static const CGFloat kHorizontalSpaceBetweenTextLabelAndButton = 36.0f;
 static const CGFloat kVerticalSpaceBetweenButtonAndTextLabelLarge = 20.0f;
 static const CGFloat kVerticalSpaceBetweenButtonAndTextLabelSmall = 12.0f;

 typedef NS_ENUM(NSInteger, MDCBannerViewLayoutMode) {
   MDCBannerViewLayoutSingleLineStyle = 0,              // All elements lays on the same line
   MDCBannerViewLayoutMultiLineStackedButtonStyle = 1,  // Stacked button layout
   MDCBannerViewLayoutMultiLineAlignedButtonStyle = 2   // All buttons lays on the same line
 };

 @interface MDCBannerViewLayout ()

 @property(nonatomic, strong) NSMutableArray *internalButtonFrames;
 @property(nonatomic, strong) UIView *imageContainer;
 @property(nonatomic, strong) UILabel *textLabel;

 @property(nonatomic, assign) CGSize sizeToFit;

 @property(nonatomic, assign) CGSize frameSize;
 @property(nonatomic, assign) MDCBannerViewLayoutMode style;

 @end

 @implementation MDCBannerViewLayout

 - (instancetype)initWithSizeToFit:(CGSize)sizeToFit
                         textLabel:(UILabel *)textLabel
                    imageContainer:(UIView *)imageContainer
                           buttons:(NSArray<__kindof UIButton *> *)buttons {
   self = [super init];
   if (self) {
     _sizeToFit = sizeToFit;
     _internalButtonFrames = [[NSMutableArray alloc] init];

     _imageContainer = [[UIView alloc] initWithFrame:imageContainer.frame];
     _textLabel = [[UILabel alloc] initWithFrame:textLabel.frame];
     _textLabel.text = textLabel.text;
     _textLabel.font = textLabel.font;
     _textLabel.numberOfLines = textLabel.numberOfLines;

     for (NSUInteger index = 0; index < buttons.count; ++index) {
       UIButton *button = buttons[index];
       [button sizeToFit];
       [_internalButtonFrames addObject:[NSValue valueWithCGRect:button.frame]];
     }
     [self layout];
   }
   return self;
 }

 - (void)layout {
   self.style = [self layoutStyleForSizeToFit:self.sizeToFit];
   self.frameSize = [self frameSizeForLayoutStyle:self.style withSizeToFit:self.sizeToFit];
   [self updateLayoutWithStyle:self.style];
 }

 - (MDCBannerViewLayoutMode)layoutStyleForSizeToFit:(CGSize)sizeToFit {
   CGFloat remainingWidth = self.sizeToFit.width;
   remainingWidth -= (kLeadingPadding + kTrailingPadding);
   remainingWidth -= [self buttonsWidthSum];
   remainingWidth -= kHorizontalSpaceBetweenTextLabelAndButton;
   if (self.imageContainer) {
     remainingWidth -= self.imageContainer.frame.size.width;
     remainingWidth -= kSpaceBetweenIconImageAndTextLabel;
   }
   if ([self isAbleToFitTextLabelWithWidthLimit:remainingWidth]) {
     return MDCBannerViewLayoutSingleLineStyle;
   } else {
     if ([self buttonsWidthSum] + kLeadingPadding + kTrailingPadding > self.sizeToFit.width) {
       return MDCBannerViewLayoutMultiLineStackedButtonStyle;
     } else {
       return MDCBannerViewLayoutMultiLineAlignedButtonStyle;
     }
   }
 }

 - (CGSize)frameSizeForLayoutStyle:(MDCBannerViewLayoutMode)style withSizeToFit:(CGSize)sizeToFit {
   CGFloat frameHeight = 0.0f;
   switch (style) {
     case MDCBannerViewLayoutSingleLineStyle: {
       frameHeight += kTopPaddingSmall + kBottomPadding;
       NSMutableArray *singleLineViews = [[NSMutableArray alloc] init];
       [singleLineViews addObject:self.textLabel];
       if (self.imageContainer) {
         [singleLineViews addObject:self.imageContainer];
       }
       frameHeight +=
           MAX([self maximumHeightAmongViews:singleLineViews], [self maximumButtonHeight]);
       break;
     }
     case MDCBannerViewLayoutMultiLineAlignedButtonStyle: {
       frameHeight += [self getFrameHeightOfImageAndTextWithSizeToFit:sizeToFit];
       frameHeight += [self maximumButtonHeight];
       break;
     }
     case MDCBannerViewLayoutMultiLineStackedButtonStyle: {
       frameHeight += [self getFrameHeightOfImageAndTextWithSizeToFit:sizeToFit];
       frameHeight += [self buttonsHeightSum];
       break;
     }
   }
   return CGSizeMake(sizeToFit.width, frameHeight);
 }

 - (CGFloat)getFrameHeightOfImageAndTextWithSizeToFit:(CGSize)sizeToFit {
   CGFloat frameHeight = kTopPaddingLarge + kBottomPadding;
   CGFloat remainingWidth = sizeToFit.width - kLeadingPadding - kTrailingPadding;
   CGSize textLabelSize = CGSizeZero;
   if (self.imageContainer) {
     remainingWidth -= (self.imageContainer.frame.size.width + kSpaceBetweenIconImageAndTextLabel);
     textLabelSize = [self.textLabel sizeThatFits:CGSizeMake(remainingWidth, CGFLOAT_MAX)];
     frameHeight += MAX(textLabelSize.height + kVerticalSpaceBetweenButtonAndTextLabelLarge,
                        76.0f);  // Hard coded value here (Image side + padding)
   } else {
     frameHeight += kVerticalSpaceBetweenButtonAndTextLabelSmall;
     textLabelSize = [self.textLabel sizeThatFits:CGSizeMake(remainingWidth, CGFLOAT_MAX)];
     frameHeight += textLabelSize.height;
   }
   return frameHeight;
 }

 - (void)updateLayoutWithStyle:(MDCBannerViewLayoutMode)style {
   switch (style) {
     case MDCBannerViewLayoutSingleLineStyle: {
       CGFloat currentXAxis = 0.0f;
       currentXAxis += kLeadingPadding;
       CGFloat remainingWidth = self.sizeToFit.width;
       remainingWidth -= (kLeadingPadding + kTrailingPadding);
       remainingWidth -= [self buttonsWidthSum];
       remainingWidth -= kHorizontalSpaceBetweenTextLabelAndButton;
       if (self.imageContainer) {
         CGRect originalIconimageContainer = self.imageContainer.frame;
         self.imageContainer.frame = CGRectMake(
             currentXAxis, self.frameSize.height / 2 - originalIconimageContainer.size.height / 2,
             originalIconimageContainer.size.width, originalIconimageContainer.size.height);
         currentXAxis += self.imageContainer.frame.size.width;
         currentXAxis += kSpaceBetweenIconImageAndTextLabel;
         remainingWidth -= self.imageContainer.frame.size.width;
         remainingWidth -= kSpaceBetweenIconImageAndTextLabel;
       }
       CGSize textLabelSize = [self.textLabel sizeThatFits:CGSizeMake(remainingWidth, CGFLOAT_MAX)];
       self.textLabel.frame =
           CGRectMake(currentXAxis, self.frameSize.height / 2 - textLabelSize.height / 2,
                      textLabelSize.width, textLabelSize.height);
       currentXAxis += self.textLabelFrame.size.width;
       for (NSUInteger index = 0; index < self.internalButtonFrames.count; ++index) {
         currentXAxis += kButtonHorizontalIntervalSpace;
         CGRect buttonFrame = [self.internalButtonFrames[index] CGRectValue];
         CGRect newButtonFrame =
             CGRectMake(currentXAxis, self.frameSize.height / 2 - buttonFrame.size.height / 2,
                        buttonFrame.size.width, buttonFrame.size.height);
         self.internalButtonFrames[index] = [NSValue valueWithCGRect:newButtonFrame];
         currentXAxis += newButtonFrame.size.width;
       }
       break;
     }
     case MDCBannerViewLayoutMultiLineAlignedButtonStyle: {
       CGFloat currentXAxis = 0.0f;
       CGFloat currentYAxis = 0.0f;
       currentYAxis += kTopPaddingLarge;
       currentXAxis += kLeadingPadding;
       CGFloat remainingWidth = self.sizeToFit.width - kLeadingPadding - kTrailingPadding;
       if (self.imageContainer) {
         CGSize originalImageSize = self.imageContainerFrame.size;
         self.imageContainer.frame = CGRectMake(currentXAxis, currentYAxis, originalImageSize.width,
                                                originalImageSize.height);
         currentXAxis += self.imageContainerFrame.size.width;
         currentXAxis += kSpaceBetweenIconImageAndTextLabel;
         remainingWidth -=
             (self.imageContainer.frame.size.width + kSpaceBetweenIconImageAndTextLabel);
       }
       CGSize textLabelSize = [self.textLabel sizeThatFits:CGSizeMake(remainingWidth, CGFLOAT_MAX)];
       self.textLabel.frame =
           CGRectMake(currentXAxis, currentYAxis, textLabelSize.width, textLabelSize.height);
       currentXAxis = self.frameSize.width;
       currentYAxis = self.frameSize.height;
       currentXAxis -= kTrailingPadding;
       currentYAxis -= kBottomPadding;
       CGFloat buttonMaximumHeight = [self maximumButtonHeight];
       CGFloat currentYAxisCenter = currentYAxis - buttonMaximumHeight / 2;
       NSUInteger buttonCount = self.internalButtonFrames.count;
       for (NSUInteger index = 0; index <= buttonCount - 1; ++index) {
         CGRect buttonFrame = [self.internalButtonFrames[buttonCount - index - 1] CGRectValue];
         currentXAxis -= buttonFrame.size.width;
         CGRect newButtonFrame =
             CGRectMake(currentXAxis, currentYAxisCenter - buttonFrame.size.height / 2,
                        buttonFrame.size.width, buttonFrame.size.height);
         self.internalButtonFrames[buttonCount - index - 1] =
             [NSValue valueWithCGRect:newButtonFrame];
         currentXAxis -= kButtonHorizontalIntervalSpace;
       }
       break;
     }
     case MDCBannerViewLayoutMultiLineStackedButtonStyle: {
       CGFloat currentXAxis = 0.0f;
       CGFloat currentYAxis = 0.0f;
       currentYAxis += kTopPaddingLarge;
       currentXAxis += kLeadingPadding;
       CGFloat remainingWidth = self.sizeToFit.width - kLeadingPadding - kTrailingPadding;
       if (self.imageContainer) {
         CGSize originalIconImageSize = self.imageContainerFrame.size;
         self.imageContainer.frame = CGRectMake(
             currentXAxis, currentYAxis, originalIconImageSize.width, originalIconImageSize.height);
         currentXAxis += self.imageContainerFrame.size.width;
         currentXAxis += kSpaceBetweenIconImageAndTextLabel;
         remainingWidth -=
             (self.imageContainer.frame.size.width + kSpaceBetweenIconImageAndTextLabel);
       }
       CGSize textLabelSize = [self.textLabel sizeThatFits:CGSizeMake(remainingWidth, CGFLOAT_MAX)];
       self.textLabel.frame =
           CGRectMake(currentXAxis, currentYAxis, textLabelSize.width, textLabelSize.height);
       currentXAxis = self.frameSize.width;
       currentYAxis = self.frameSize.height;
       currentXAxis -= kTrailingPadding;
       currentYAxis -= kBottomPadding;
       NSUInteger buttonCount = self.internalButtonFrames.count;
       for (NSUInteger index = 0; index <= buttonCount - 1; ++index) {
         CGRect buttonFrame = [self.internalButtonFrames[buttonCount - index - 1] CGRectValue];
         currentYAxis -= buttonFrame.size.height;
         CGRect newButtonFrame = CGRectMake(currentXAxis - buttonFrame.size.width, currentYAxis,
                                            buttonFrame.size.width, buttonFrame.size.height);
         self.internalButtonFrames[buttonCount - index - 1] =
             [NSValue valueWithCGRect:newButtonFrame];
         currentYAxis -= kButtonVerticalIntervalSpace;
       }
       break;
     }
   }
 }

 #pragma mark - Internal Layout Value Helpers

 - (CGFloat)buttonsWidthSum {
   CGFloat buttonsWidthSum = 0.0f;
   for (NSValue *buttonFrame in self.internalButtonFrames) {
     buttonsWidthSum += [buttonFrame CGRectValue].size.width;
   }
   if (self.internalButtonFrames.count > 0) {
     buttonsWidthSum += (self.internalButtonFrames.count - 1) * kButtonHorizontalIntervalSpace;
   }
   return buttonsWidthSum;
 }

 - (CGFloat)buttonsHeightSum {
   CGFloat buttonsHeightSum = 0.0f;
   for (NSValue *buttonFrame in self.internalButtonFrames) {
     buttonsHeightSum += [buttonFrame CGRectValue].size.height;
   }
   if (self.internalButtonFrames.count > 0) {
     buttonsHeightSum += (self.internalButtonFrames.count - 1) * kButtonVerticalIntervalSpace;
   }
   return buttonsHeightSum;
 }

 - (BOOL)isAbleToFitTextLabelWithWidthLimit:(CGFloat)widthLimit {
   CGSize size =
       [self.textLabel.text sizeWithAttributes:@{NSFontAttributeName : self.textLabel.font}];
   return size.width <= widthLimit;
 }

 - (CGFloat)maximumHeightAmongViews:(NSArray<__kindof UIView *> *)views {
   CGFloat maximumHeight = 0.0f;
   for (UIView *view in views) {
     maximumHeight = MAX(maximumHeight, view.frame.size.height);
   }
   return maximumHeight;
 }

 - (CGFloat)maximumButtonHeight {
   CGFloat maximumHeight = 0.0f;
   for (NSValue *buttonFrame in self.internalButtonFrames) {
     maximumHeight = MAX(maximumHeight, [buttonFrame CGRectValue].size.height);
   }
   return maximumHeight;
 }

 #pragma mark - APIs

 - (NSArray *)buttonFrames {
   return [self.internalButtonFrames copy];
 }

 - (CGRect)imageContainerFrame {
   return self.imageContainer.frame;
 }

 - (CGRect)textLabelFrame {
   return self.textLabel.frame;
 }

 @end
	// Copyright 2018-present the Material Components for iOS authors. All Rights Reserved.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#import <UIKit/UIKit.h>

	#import "MDCBannerView.h"
	#import "MDCBannerViewLayout.h"

	static const CGFloat kLeadingPadding = 16.0f;
	static const CGFloat kTrailingPadding = 8.0f;
	static const CGFloat kTopPaddingSmall = 10.0f;
	static const CGFloat kTopPaddingLarge = 24.0f;
	static const CGFloat kBottomPadding = 8.0f;
	static const CGFloat kButtonHorizontalIntervalSpace = 8.0f;
	static const CGFloat kButtonVerticalIntervalSpace = 8.0f;
	static const CGFloat kSpaceBetweenIconImageAndTextLabel = 16.0f;
	static const CGFloat kHorizontalSpaceBetweenTextLabelAndButton = 36.0f;
	static const CGFloat kVerticalSpaceBetweenButtonAndTextLabelLarge = 20.0f;
	static const CGFloat kVerticalSpaceBetweenButtonAndTextLabelSmall = 12.0f;

	typedef NS_ENUM(NSInteger, MDCBannerViewLayoutMode) {
	MDCBannerViewLayoutSingleLineStyle = 0, // All elements lays on the same line
	MDCBannerViewLayoutMultiLineStackedButtonStyle = 1, // Stacked button layout
	MDCBannerViewLayoutMultiLineAlignedButtonStyle = 2 // All buttons lays on the same line
	};

	@interface MDCBannerViewLayout ()

	@property(nonatomic, strong) NSMutableArray *internalButtonFrames;
	@property(nonatomic, strong) UIView *imageContainer;
	@property(nonatomic, strong) UILabel *textLabel;

	@property(nonatomic, assign) CGSize sizeToFit;

	@property(nonatomic, assign) CGSize frameSize;
	@property(nonatomic, assign) MDCBannerViewLayoutMode style;

	@end

	@implementation MDCBannerViewLayout

	- (instancetype)initWithSizeToFit:(CGSize)sizeToFit
	textLabel:(UILabel *)textLabel
	imageContainer:(UIView *)imageContainer
	buttons:(NSArray<__kindof UIButton > )buttons {
	self = [super init];
	if (self) {
	_sizeToFit = sizeToFit;
	_internalButtonFrames = [[NSMutableArray alloc] init];

	_imageContainer = [[UIView alloc] initWithFrame:imageContainer.frame];
	_textLabel = [[UILabel alloc] initWithFrame:textLabel.frame];
	_textLabel.text = textLabel.text;
	_textLabel.font = textLabel.font;
	_textLabel.numberOfLines = textLabel.numberOfLines;

	for (NSUInteger index = 0; index < buttons.count; ++index) {
	UIButton *button = buttons[index];
	[button sizeToFit];
	[_internalButtonFrames addObject:[NSValue valueWithCGRect:button.frame]];
	}
	[self layout];
	}
	return self;
	}

	- (void)layout {
	self.style = [self layoutStyleForSizeToFit:self.sizeToFit];
	self.frameSize = [self frameSizeForLayoutStyle:self.style withSizeToFit:self.sizeToFit];
	[self updateLayoutWithStyle:self.style];
	}

	- (MDCBannerViewLayoutMode)layoutStyleForSizeToFit:(CGSize)sizeToFit {
	CGFloat remainingWidth = self.sizeToFit.width;
	remainingWidth -= (kLeadingPadding + kTrailingPadding);
	remainingWidth -= [self buttonsWidthSum];
	remainingWidth -= kHorizontalSpaceBetweenTextLabelAndButton;
	if (self.imageContainer) {
	remainingWidth -= self.imageContainer.frame.size.width;
	remainingWidth -= kSpaceBetweenIconImageAndTextLabel;
	}
	if ([self isAbleToFitTextLabelWithWidthLimit:remainingWidth]) {
	return MDCBannerViewLayoutSingleLineStyle;
	} else {
	if ([self buttonsWidthSum] + kLeadingPadding + kTrailingPadding > self.sizeToFit.width) {
	return MDCBannerViewLayoutMultiLineStackedButtonStyle;
	} else {
	return MDCBannerViewLayoutMultiLineAlignedButtonStyle;
	}
	}
	}

	- (CGSize)frameSizeForLayoutStyle:(MDCBannerViewLayoutMode)style withSizeToFit:(CGSize)sizeToFit {
	CGFloat frameHeight = 0.0f;
	switch (style) {
	case MDCBannerViewLayoutSingleLineStyle: {
	frameHeight += kTopPaddingSmall + kBottomPadding;
	NSMutableArray *singleLineViews = [[NSMutableArray alloc] init];
	[singleLineViews addObject:self.textLabel];
	if (self.imageContainer) {
	[singleLineViews addObject:self.imageContainer];
	}
	frameHeight +=
	MAX([self maximumHeightAmongViews:singleLineViews], [self maximumButtonHeight]);
	break;
	}
	case MDCBannerViewLayoutMultiLineAlignedButtonStyle: {
	frameHeight += [self getFrameHeightOfImageAndTextWithSizeToFit:sizeToFit];
	frameHeight += [self maximumButtonHeight];
	break;
	}
	case MDCBannerViewLayoutMultiLineStackedButtonStyle: {
	frameHeight += [self getFrameHeightOfImageAndTextWithSizeToFit:sizeToFit];
	frameHeight += [self buttonsHeightSum];
	break;
	}
	}
	return CGSizeMake(sizeToFit.width, frameHeight);
	}

	- (CGFloat)getFrameHeightOfImageAndTextWithSizeToFit:(CGSize)sizeToFit {
	CGFloat frameHeight = kTopPaddingLarge + kBottomPadding;
	CGFloat remainingWidth = sizeToFit.width - kLeadingPadding - kTrailingPadding;
	CGSize textLabelSize = CGSizeZero;
	if (self.imageContainer) {
	remainingWidth -= (self.imageContainer.frame.size.width + kSpaceBetweenIconImageAndTextLabel);
	textLabelSize = [self.textLabel sizeThatFits:CGSizeMake(remainingWidth, CGFLOAT_MAX)];
	frameHeight += MAX(textLabelSize.height + kVerticalSpaceBetweenButtonAndTextLabelLarge,
	76.0f); // Hard coded value here (Image side + padding)
	} else {
	frameHeight += kVerticalSpaceBetweenButtonAndTextLabelSmall;
	textLabelSize = [self.textLabel sizeThatFits:CGSizeMake(remainingWidth, CGFLOAT_MAX)];
	frameHeight += textLabelSize.height;
	}
	return frameHeight;
	}

	- (void)updateLayoutWithStyle:(MDCBannerViewLayoutMode)style {
	switch (style) {
	case MDCBannerViewLayoutSingleLineStyle: {
	CGFloat currentXAxis = 0.0f;
	currentXAxis += kLeadingPadding;
	CGFloat remainingWidth = self.sizeToFit.width;
	remainingWidth -= (kLeadingPadding + kTrailingPadding);
	remainingWidth -= [self buttonsWidthSum];
	remainingWidth -= kHorizontalSpaceBetweenTextLabelAndButton;
	if (self.imageContainer) {
	CGRect originalIconimageContainer = self.imageContainer.frame;
	self.imageContainer.frame = CGRectMake(
	currentXAxis, self.frameSize.height / 2 - originalIconimageContainer.size.height / 2,
	originalIconimageContainer.size.width, originalIconimageContainer.size.height);
	currentXAxis += self.imageContainer.frame.size.width;
	currentXAxis += kSpaceBetweenIconImageAndTextLabel;
	remainingWidth -= self.imageContainer.frame.size.width;
	remainingWidth -= kSpaceBetweenIconImageAndTextLabel;
	}
	CGSize textLabelSize = [self.textLabel sizeThatFits:CGSizeMake(remainingWidth, CGFLOAT_MAX)];
	self.textLabel.frame =
	CGRectMake(currentXAxis, self.frameSize.height / 2 - textLabelSize.height / 2,
	textLabelSize.width, textLabelSize.height);
	currentXAxis += self.textLabelFrame.size.width;
	for (NSUInteger index = 0; index < self.internalButtonFrames.count; ++index) {
	currentXAxis += kButtonHorizontalIntervalSpace;
	CGRect buttonFrame = [self.internalButtonFrames[index] CGRectValue];
	CGRect newButtonFrame =
	CGRectMake(currentXAxis, self.frameSize.height / 2 - buttonFrame.size.height / 2,
	buttonFrame.size.width, buttonFrame.size.height);
	self.internalButtonFrames[index] = [NSValue valueWithCGRect:newButtonFrame];
	currentXAxis += newButtonFrame.size.width;
	}
	break;
	}
	case MDCBannerViewLayoutMultiLineAlignedButtonStyle: {
	CGFloat currentXAxis = 0.0f;
	CGFloat currentYAxis = 0.0f;
	currentYAxis += kTopPaddingLarge;
	currentXAxis += kLeadingPadding;
	CGFloat remainingWidth = self.sizeToFit.width - kLeadingPadding - kTrailingPadding;
	if (self.imageContainer) {
	CGSize originalImageSize = self.imageContainerFrame.size;
	self.imageContainer.frame = CGRectMake(currentXAxis, currentYAxis, originalImageSize.width,
	originalImageSize.height);
	currentXAxis += self.imageContainerFrame.size.width;
	currentXAxis += kSpaceBetweenIconImageAndTextLabel;
	remainingWidth -=
	(self.imageContainer.frame.size.width + kSpaceBetweenIconImageAndTextLabel);
	}
	CGSize textLabelSize = [self.textLabel sizeThatFits:CGSizeMake(remainingWidth, CGFLOAT_MAX)];
	self.textLabel.frame =
	CGRectMake(currentXAxis, currentYAxis, textLabelSize.width, textLabelSize.height);
	currentXAxis = self.frameSize.width;
	currentYAxis = self.frameSize.height;
	currentXAxis -= kTrailingPadding;
	currentYAxis -= kBottomPadding;
	CGFloat buttonMaximumHeight = [self maximumButtonHeight];
	CGFloat currentYAxisCenter = currentYAxis - buttonMaximumHeight / 2;
	NSUInteger buttonCount = self.internalButtonFrames.count;
	for (NSUInteger index = 0; index <= buttonCount - 1; ++index) {
	CGRect buttonFrame = [self.internalButtonFrames[buttonCount - index - 1] CGRectValue];
	currentXAxis -= buttonFrame.size.width;
	CGRect newButtonFrame =
	CGRectMake(currentXAxis, currentYAxisCenter - buttonFrame.size.height / 2,
	buttonFrame.size.width, buttonFrame.size.height);
	self.internalButtonFrames[buttonCount - index - 1] =
	[NSValue valueWithCGRect:newButtonFrame];
	currentXAxis -= kButtonHorizontalIntervalSpace;
	}
	break;
	}
	case MDCBannerViewLayoutMultiLineStackedButtonStyle: {
	CGFloat currentXAxis = 0.0f;
	CGFloat currentYAxis = 0.0f;
	currentYAxis += kTopPaddingLarge;
	currentXAxis += kLeadingPadding;
	CGFloat remainingWidth = self.sizeToFit.width - kLeadingPadding - kTrailingPadding;
	if (self.imageContainer) {
	CGSize originalIconImageSize = self.imageContainerFrame.size;
	self.imageContainer.frame = CGRectMake(
	currentXAxis, currentYAxis, originalIconImageSize.width, originalIconImageSize.height);
	currentXAxis += self.imageContainerFrame.size.width;
	currentXAxis += kSpaceBetweenIconImageAndTextLabel;
	remainingWidth -=
	(self.imageContainer.frame.size.width + kSpaceBetweenIconImageAndTextLabel);
	}
	CGSize textLabelSize = [self.textLabel sizeThatFits:CGSizeMake(remainingWidth, CGFLOAT_MAX)];
	self.textLabel.frame =
	CGRectMake(currentXAxis, currentYAxis, textLabelSize.width, textLabelSize.height);
	currentXAxis = self.frameSize.width;
	currentYAxis = self.frameSize.height;
	currentXAxis -= kTrailingPadding;
	currentYAxis -= kBottomPadding;
	NSUInteger buttonCount = self.internalButtonFrames.count;
	for (NSUInteger index = 0; index <= buttonCount - 1; ++index) {
	CGRect buttonFrame = [self.internalButtonFrames[buttonCount - index - 1] CGRectValue];
	currentYAxis -= buttonFrame.size.height;
	CGRect newButtonFrame = CGRectMake(currentXAxis - buttonFrame.size.width, currentYAxis,
	buttonFrame.size.width, buttonFrame.size.height);
	self.internalButtonFrames[buttonCount - index - 1] =
	[NSValue valueWithCGRect:newButtonFrame];
	currentYAxis -= kButtonVerticalIntervalSpace;
	}
	break;
	}
	}
	}

	#pragma mark - Internal Layout Value Helpers

	- (CGFloat)buttonsWidthSum {
	CGFloat buttonsWidthSum = 0.0f;
	for (NSValue *buttonFrame in self.internalButtonFrames) {
	buttonsWidthSum += [buttonFrame CGRectValue].size.width;
	}
	if (self.internalButtonFrames.count > 0) {
	buttonsWidthSum += (self.internalButtonFrames.count - 1) * kButtonHorizontalIntervalSpace;
	}
	return buttonsWidthSum;
	}

	- (CGFloat)buttonsHeightSum {
	CGFloat buttonsHeightSum = 0.0f;
	for (NSValue *buttonFrame in self.internalButtonFrames) {
	buttonsHeightSum += [buttonFrame CGRectValue].size.height;
	}
	if (self.internalButtonFrames.count > 0) {
	buttonsHeightSum += (self.internalButtonFrames.count - 1) * kButtonVerticalIntervalSpace;
	}
	return buttonsHeightSum;
	}

	- (BOOL)isAbleToFitTextLabelWithWidthLimit:(CGFloat)widthLimit {
	CGSize size =
	[self.textLabel.text sizeWithAttributes:@{NSFontAttributeName : self.textLabel.font}];
	return size.width <= widthLimit;
	}

	- (CGFloat)maximumHeightAmongViews:(NSArray<__kindof UIView > )views {
	CGFloat maximumHeight = 0.0f;
	for (UIView *view in views) {
	maximumHeight = MAX(maximumHeight, view.frame.size.height);
	}
	return maximumHeight;
	}

	- (CGFloat)maximumButtonHeight {
	CGFloat maximumHeight = 0.0f;
	for (NSValue *buttonFrame in self.internalButtonFrames) {
	maximumHeight = MAX(maximumHeight, [buttonFrame CGRectValue].size.height);
	}
	return maximumHeight;
	}

	#pragma mark - APIs

	- (NSArray *)buttonFrames {
	return [self.internalButtonFrames copy];
	}

	- (CGRect)imageContainerFrame {
	return self.imageContainer.frame;
	}

	- (CGRect)textLabelFrame {
	return self.textLabel.frame;
	}

	@end