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https://github.com/Swiftgram/Telegram-iOS.git
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a35c109a08
Summary: * Fixes #3 * Ordering: atomicity, then [optional] readonly, then value semantics (retain/copy/assign) * Removed redundant `readwrite` * No spaces between "getter = name" ("getter=name" instead) * Property method overrides renamed as well * self.isBlah, while technically not entirely correct, still resolves to [self blah], so left alone (@kimon had advice on this sort of naming issue last summer), and largely inconsequential Test Plan: * Compile and run
69 lines
2.4 KiB
Objective-C
69 lines
2.4 KiB
Objective-C
/* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import <Foundation/Foundation.h>
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#import <UIKit/UIKit.h>
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/**
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* @abstract Negates/inverts a UIEdgeInsets.
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* @discussion Useful for undoing the application of shadow padding to a frame/bounds CGRect.
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* For example,
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* CGRect insetRect = UIEdgeInsetsRect(originalRect, insets);
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* CGRect equalToOriginalRect = UIEdgeInsetsRect(originalRect, ASDNEdgeInsetsInvert(insets));
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*/
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static inline UIEdgeInsets ASDNEdgeInsetsInvert(UIEdgeInsets insets)
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{
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UIEdgeInsets invertedInsets = UIEdgeInsetsMake(-insets.top, -insets.left, -insets.bottom, -insets.right);
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return invertedInsets;
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}
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/**
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* @abstract an immutable class for calculating shadow padding drawing a shadowed background for text
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*/
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@interface ASTextNodeShadower : NSObject
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- (instancetype)initWithShadowOffset:(CGSize)shadowOffset
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shadowColor:(CGColorRef)shadowColor
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shadowOpacity:(CGFloat)shadowOpacity
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shadowRadius:(CGFloat)shadowRadius;
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/**
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* @abstract The offset from the top-left corner at which the shadow starts.
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* @discussion A positive width will move the shadow to the right.
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* A positive height will move the shadow downwards.
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*/
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@property (nonatomic, readonly, assign) CGSize shadowOffset;
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//! CGColor in which the shadow is drawn
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@property (nonatomic, readonly, assign) CGColorRef shadowColor;
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//! Alpha of the shadow
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@property (nonatomic, readonly, assign) CGFloat shadowOpacity;
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//! Radius, in pixels
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@property (nonatomic, readonly, assign) CGFloat shadowRadius;
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/**
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* @abstract The edge insets which represent shadow padding
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* @discussion Each edge inset is less than or equal to zero.
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*
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* Example:
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* CGRect boundsWithoutShadowPadding; // Large enough to fit text, not large enough to fit the shadow as well
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* UIEdgeInsets shadowPadding = [shadower shadowPadding];
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* CGRect boundsWithShadowPadding = UIEdgeInsetsRect(boundsWithoutShadowPadding, shadowPadding);
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*/
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- (UIEdgeInsets)shadowPadding;
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/**
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* @abstract draws the shadow for text in the provided CGContext
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* @discussion Call within the text node's +drawRect method
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*/
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- (void)setShadowInContext:(CGContextRef)context;
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@end
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