130 lines
2.8 KiB
Objective-C
130 lines
2.8 KiB
Objective-C
//
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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#import "OWSBubbleStrokeView.h"
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#import "OWSBubbleView.h"
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#import <SignalMessaging/UIView+OWS.h>
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NS_ASSUME_NONNULL_BEGIN
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@interface OWSBubbleStrokeView ()
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@property (nonatomic) CAShapeLayer *shapeLayer;
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@property (nonatomic, weak) OWSBubbleView *bubbleView;
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@end
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#pragma mark -
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@implementation OWSBubbleStrokeView
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- (instancetype)init
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{
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self = [super init];
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if (!self) {
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return self;
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}
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self.opaque = NO;
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self.backgroundColor = [UIColor clearColor];
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self.shapeLayer = [CAShapeLayer new];
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[self.layer addSublayer:self.shapeLayer];
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return self;
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}
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- (void)setStrokeColor:(UIColor *)strokeColor
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{
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_strokeColor = strokeColor;
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[self updateLayers];
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}
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- (void)setStrokeThickness:(CGFloat)strokeThickness
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{
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_strokeThickness = strokeThickness;
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[self updateLayers];
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}
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- (void)setFrame:(CGRect)frame
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{
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BOOL didChange = !CGRectEqualToRect(self.frame, frame);
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[super setFrame:frame];
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if (didChange) {
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[self updateLayers];
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}
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}
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- (void)setBounds:(CGRect)bounds
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{
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BOOL didChange = !CGRectEqualToRect(self.bounds, bounds);
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[super setBounds:bounds];
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if (didChange) {
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[self updateLayers];
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}
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}
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- (void)setCenter:(CGPoint)center
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{
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[super setCenter:center];
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[self updateLayers];
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}
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- (void)updateLayers
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{
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if (!self.shapeLayer) {
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return;
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}
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// Prevent the shape layer from animating changes.
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[CATransaction begin];
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[CATransaction setDisableActions:YES];
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// Don't fill the shape layer; we just want a stroke around the border.
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self.shapeLayer.fillColor = [UIColor clearColor].CGColor;
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[CATransaction commit];
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self.clipsToBounds = YES;
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if (!self.bubbleView) {
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return;
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}
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UIBezierPath *bezierPath = [UIBezierPath new];
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UIBezierPath *boundsBezierPath = [UIBezierPath bezierPathWithRect:self.bounds];
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[bezierPath appendPath:boundsBezierPath];
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UIBezierPath *bubbleBezierPath = [self.bubbleView maskPath];
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// We need to convert between coordinate systems using layers, not views.
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CGPoint bubbleOffset = [self.layer convertPoint:CGPointZero fromLayer:self.bubbleView.layer];
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CGAffineTransform transform = CGAffineTransformMakeTranslation(bubbleOffset.x, bubbleOffset.y);
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[bubbleBezierPath applyTransform:transform];
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[bezierPath appendPath:bubbleBezierPath];
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// Prevent the shape layer from animating changes.
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[CATransaction begin];
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[CATransaction setDisableActions:YES];
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self.shapeLayer.strokeColor = self.strokeColor.CGColor;
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self.shapeLayer.lineWidth = self.strokeThickness;
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self.shapeLayer.zPosition = 100.f;
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self.shapeLayer.path = bezierPath.CGPath;
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[CATransaction commit];
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}
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@end
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NS_ASSUME_NONNULL_END
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