added files via upload

Tweaks/FLEX/Toolbar/FLEXExplorerToolbarItem.m

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+//
+//  FLEXExplorerToolbarItem.m
+//  Flipboard
+//
+//  Created by Ryan Olson on 4/4/14.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXColor.h"
+#import "FLEXExplorerToolbarItem.h"
+#import "FLEXUtility.h"
+
+@interface FLEXExplorerToolbarItem ()
+
+@property (nonatomic) FLEXExplorerToolbarItem *sibling;
+@property (nonatomic, copy) NSString *title;
+@property (nonatomic) UIImage *image;
+
+@property (nonatomic, readonly, class) UIColor *defaultBackgroundColor;
+@property (nonatomic, readonly, class) UIColor *highlightedBackgroundColor;
+@property (nonatomic, readonly, class) UIColor *selectedBackgroundColor;
+
+@end
+
+@implementation FLEXExplorerToolbarItem
+
+#pragma mark - Public
+
++ (instancetype)itemWithTitle:(NSString *)title image:(UIImage *)image {
+    return [self itemWithTitle:title image:image sibling:nil];
+}
+
++ (instancetype)itemWithTitle:(NSString *)title image:(UIImage *)image sibling:(FLEXExplorerToolbarItem *)backupItem {
+    NSParameterAssert(title); NSParameterAssert(image);
+    
+    FLEXExplorerToolbarItem *toolbarItem = [self buttonWithType:UIButtonTypeSystem];
+    toolbarItem.sibling = backupItem;
+    toolbarItem.title = title;
+    toolbarItem.image = image;
+    toolbarItem.tintColor = FLEXColor.iconColor;
+    toolbarItem.backgroundColor = self.defaultBackgroundColor;
+    toolbarItem.titleLabel.font = [UIFont systemFontOfSize:12.0];
+    [toolbarItem setTitle:title forState:UIControlStateNormal];
+    [toolbarItem setImage:image forState:UIControlStateNormal];
+    [toolbarItem setTitleColor:FLEXColor.primaryTextColor forState:UIControlStateNormal];
+    [toolbarItem setTitleColor:FLEXColor.deemphasizedTextColor forState:UIControlStateDisabled];
+    return toolbarItem;
+}
+
+- (FLEXExplorerToolbarItem *)currentItem {
+    if (!self.enabled && self.sibling) {
+        return self.sibling.currentItem;
+    }
+    
+    return self;
+}
+
+
+#pragma mark - Display Defaults
+
++ (NSDictionary<NSString *, id> *)titleAttributes {
+    return @{ NSFontAttributeName : [UIFont systemFontOfSize:12.0] };
+}
+
++ (UIColor *)highlightedBackgroundColor {
+    return FLEXColor.toolbarItemHighlightedColor;
+}
+
++ (UIColor *)selectedBackgroundColor {
+    return FLEXColor.toolbarItemSelectedColor;
+}
+
++ (UIColor *)defaultBackgroundColor {
+    return UIColor.clearColor;
+}
+
++ (CGFloat)topMargin {
+    return 2.0;
+}
+
+
+#pragma mark - State Changes
+
+- (void)setHighlighted:(BOOL)highlighted {
+    super.highlighted = highlighted;
+    [self updateColors];
+}
+
+- (void)setSelected:(BOOL)selected {
+    super.selected = selected;
+    [self updateColors];
+}
+
+- (void)setEnabled:(BOOL)enabled {
+    if (self.enabled != enabled) {
+        if (self.sibling) {
+            if (enabled) { // Replace sibling with myself
+                UIView *superview = self.sibling.superview;
+                [self.sibling removeFromSuperview];
+                self.frame = self.sibling.frame;
+                [superview addSubview:self];
+            } else { // Replace myself with sibling
+                UIView *superview = self.superview;
+                [self removeFromSuperview];
+                self.sibling.frame = self.frame;
+                [superview addSubview:self.sibling];
+            }
+        }
+        
+        super.enabled = enabled;
+    }
+}
+
++ (id)_selectedIndicatorImage { return nil; }
+
+- (void)updateColors {
+    // Background color
+    if (self.highlighted) {
+        self.backgroundColor = self.class.highlightedBackgroundColor;
+    } else if (self.selected) {
+        self.backgroundColor = self.class.selectedBackgroundColor;
+    } else {
+        self.backgroundColor = self.class.defaultBackgroundColor;
+    }
+}
+
+
+#pragma mark - UIButton Layout Overrides
+
+- (CGRect)titleRectForContentRect:(CGRect)contentRect {
+    NSDictionary *attrs = [[self class] titleAttributes];
+    // Bottom aligned and centered.
+    CGRect titleRect = CGRectZero;
+    CGSize titleSize = [self.title boundingRectWithSize:contentRect.size
+                                                options:0
+                                             attributes:attrs
+                                                context:nil].size;
+    titleSize = CGSizeMake(ceil(titleSize.width), ceil(titleSize.height));
+    titleRect.size = titleSize;
+    titleRect.origin.y = contentRect.origin.y + CGRectGetMaxY(contentRect) - titleSize.height;
+    titleRect.origin.x = contentRect.origin.x + FLEXFloor((contentRect.size.width - titleSize.width) / 2.0);
+    return titleRect;
+}
+
+- (CGRect)imageRectForContentRect:(CGRect)contentRect {
+    CGSize imageSize = self.image.size;
+    CGRect titleRect = [self titleRectForContentRect:contentRect];
+    CGFloat availableHeight = contentRect.size.height - titleRect.size.height - [[self class] topMargin];
+    CGFloat originY = [[self class] topMargin] + FLEXFloor((availableHeight - imageSize.height) / 2.0);
+    CGFloat originX = FLEXFloor((contentRect.size.width - imageSize.width) / 2.0);
+    CGRect imageRect = CGRectMake(originX, originY, imageSize.width, imageSize.height);
+    return imageRect;
+}
+
+@end