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//
// YYTextEffectWindow.m
// YYText <https://github.com/ibireme/YYText>
//
// Created by ibireme on 15/2/25.
// Copyright (c) 2015 ibireme.
//
// This source code is licensed under the MIT-style license found in the
// LICENSE file in the root directory of this source tree.
//
#import "YYTextEffectWindow.h"
#import "YYTextKeyboardManager.h"
#import "YYTextUtilities.h"
#import "UIView+YYText.h"
@implementation YYTextEffectWindow
+ (instancetype)sharedWindow {
static YYTextEffectWindow *one = nil;
if (one == nil) {
// iOS 9 compatible
NSString *mode = [NSRunLoop currentRunLoop].currentMode;
if (mode.length == 27 &&
[mode hasPrefix:@"UI"] &&
[mode hasSuffix:@"InitializationRunLoopMode"]) {
return nil;
}
}
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
if (!YYTextIsAppExtension()) {
one = [self new];
one.frame = (CGRect){.size = YYTextScreenSize()};
one.userInteractionEnabled = NO;
one.windowLevel = UIWindowLevelStatusBar + 1;
one.hidden = NO;
// for iOS 9:
one.opaque = NO;
one.backgroundColor = [UIColor clearColor];
one.layer.backgroundColor = [UIColor clearColor].CGColor;
}
});
return one;
}
// stop self from becoming the KeyWindow
- (void)becomeKeyWindow {
[[YYTextSharedApplication().delegate window] makeKeyWindow];
}
- (UIViewController *)rootViewController {
for (UIWindow *window in [YYTextSharedApplication() windows]) {
if (self == window) continue;
if (window.hidden) continue;
UIViewController *topViewController = window.rootViewController;
if (topViewController) return topViewController;
}
UIViewController *viewController = [super rootViewController];
if (!viewController) {
viewController = [UIViewController new];
[super setRootViewController:viewController];
}
return viewController;
}
// Bring self to front
- (void)_updateWindowLevel {
UIApplication *app = YYTextSharedApplication();
if (!app) return;
UIWindow *top = app.windows.lastObject;
UIWindow *key = app.keyWindow;
if (key && key.windowLevel > top.windowLevel) top = key;
if (top == self) return;
self.windowLevel = top.windowLevel + 1;
}
- (YYTextDirection)_keyboardDirection {
CGRect keyboardFrame = [YYTextKeyboardManager defaultManager].keyboardFrame;
keyboardFrame = [[YYTextKeyboardManager defaultManager] convertRect:keyboardFrame toView:self];
if (CGRectIsNull(keyboardFrame) || CGRectIsEmpty(keyboardFrame)) return YYTextDirectionNone;
if (CGRectGetMinY(keyboardFrame) == 0 &&
CGRectGetMinX(keyboardFrame) == 0 &&
CGRectGetMaxX(keyboardFrame) == CGRectGetWidth(self.frame))
return YYTextDirectionTop;
if (CGRectGetMaxX(keyboardFrame) == CGRectGetWidth(self.frame) &&
CGRectGetMinY(keyboardFrame) == 0 &&
CGRectGetMaxY(keyboardFrame) == CGRectGetHeight(self.frame))
return YYTextDirectionRight;
if (CGRectGetMaxY(keyboardFrame) == CGRectGetHeight(self.frame) &&
CGRectGetMinX(keyboardFrame) == 0 &&
CGRectGetMaxX(keyboardFrame) == CGRectGetWidth(self.frame))
return YYTextDirectionBottom;
if (CGRectGetMinX(keyboardFrame) == 0 &&
CGRectGetMinY(keyboardFrame) == 0 &&
CGRectGetMaxY(keyboardFrame) == CGRectGetHeight(self.frame))
return YYTextDirectionLeft;
return YYTextDirectionNone;
}
- (CGPoint)_correctedCaptureCenter:(CGPoint)center{
CGRect keyboardFrame = [YYTextKeyboardManager defaultManager].keyboardFrame;
keyboardFrame = [[YYTextKeyboardManager defaultManager] convertRect:keyboardFrame toView:self];
if (!CGRectIsNull(keyboardFrame) && !CGRectIsEmpty(keyboardFrame)) {
YYTextDirection direction = [self _keyboardDirection];
switch (direction) {
case YYTextDirectionTop: {
if (center.y < CGRectGetMaxY(keyboardFrame)) center.y = CGRectGetMaxY(keyboardFrame);
} break;
case YYTextDirectionRight: {
if (center.x > CGRectGetMinX(keyboardFrame)) center.x = CGRectGetMinX(keyboardFrame);
} break;
case YYTextDirectionBottom: {
if (center.y > CGRectGetMinY(keyboardFrame)) center.y = CGRectGetMinY(keyboardFrame);
} break;
case YYTextDirectionLeft: {
if (center.x < CGRectGetMaxX(keyboardFrame)) center.x = CGRectGetMaxX(keyboardFrame);
} break;
default: break;
}
}
return center;
}
- (CGPoint)_correctedCenter:(CGPoint)center forMagnifier:(YYTextMagnifier *)mag rotation:(CGFloat)rotation {
CGFloat degree = YYTextRadiansToDegrees(rotation);
degree /= 45.0;
if (degree < 0) degree += (int)(-degree/8.0 + 1) * 8;
if (degree > 8) degree -= (int)(degree/8.0) * 8;
CGFloat caretExt = 10;
if (degree <= 1 || degree >= 7) { //top
if (mag.type == YYTextMagnifierTypeCaret) {
if (center.y < caretExt)
center.y = caretExt;
} else if (mag.type == YYTextMagnifierTypeRanged) {
if (center.y < mag.bounds.size.height)
center.y = mag.bounds.size.height;
}
} else if (1 < degree && degree < 3) { // right
if (mag.type == YYTextMagnifierTypeCaret) {
if (center.x > self.bounds.size.width - caretExt)
center.x = self.bounds.size.width - caretExt;
} else if (mag.type == YYTextMagnifierTypeRanged) {
if (center.x > self.bounds.size.width - mag.bounds.size.height)
center.x = self.bounds.size.width - mag.bounds.size.height;
}
} else if (3 <= degree && degree <= 5) { // bottom
if (mag.type == YYTextMagnifierTypeCaret) {
if (center.y > self.bounds.size.height - caretExt)
center.y = self.bounds.size.height - caretExt;
} else if (mag.type == YYTextMagnifierTypeRanged) {
if (center.y > mag.bounds.size.height)
center.y = mag.bounds.size.height;
}
} else if (5 < degree && degree < 7) { // left
if (mag.type == YYTextMagnifierTypeCaret) {
if (center.x < caretExt)
center.x = caretExt;
} else if (mag.type == YYTextMagnifierTypeRanged) {
if (center.x < mag.bounds.size.height)
center.x = mag.bounds.size.height;
}
}
CGRect keyboardFrame = [YYTextKeyboardManager defaultManager].keyboardFrame;
keyboardFrame = [[YYTextKeyboardManager defaultManager] convertRect:keyboardFrame toView:self];
if (!CGRectIsNull(keyboardFrame) && !CGRectIsEmpty(keyboardFrame)) {
YYTextDirection direction = [self _keyboardDirection];
switch (direction) {
case YYTextDirectionTop: {
if (mag.type == YYTextMagnifierTypeCaret) {
if (center.y - mag.bounds.size.height / 2 < CGRectGetMaxY(keyboardFrame))
center.y = CGRectGetMaxY(keyboardFrame) + mag.bounds.size.height / 2;
} else if (mag.type == YYTextMagnifierTypeRanged) {
if (center.y < CGRectGetMaxY(keyboardFrame)) center.y = CGRectGetMaxY(keyboardFrame);
}
} break;
case YYTextDirectionRight: {
if (mag.type == YYTextMagnifierTypeCaret) {
if (center.x + mag.bounds.size.height / 2 > CGRectGetMinX(keyboardFrame))
center.x = CGRectGetMinX(keyboardFrame) - mag.bounds.size.width / 2;
} else if (mag.type == YYTextMagnifierTypeRanged) {
if (center.x > CGRectGetMinX(keyboardFrame)) center.x = CGRectGetMinX(keyboardFrame);
}
} break;
case YYTextDirectionBottom: {
if (mag.type == YYTextMagnifierTypeCaret) {
if (center.y + mag.bounds.size.height / 2 > CGRectGetMinY(keyboardFrame))
center.y = CGRectGetMinY(keyboardFrame) - mag.bounds.size.height / 2;
} else if (mag.type == YYTextMagnifierTypeRanged) {
if (center.y > CGRectGetMinY(keyboardFrame)) center.y = CGRectGetMinY(keyboardFrame);
}
} break;
case YYTextDirectionLeft: {
if (mag.type == YYTextMagnifierTypeCaret) {
if (center.x - mag.bounds.size.height / 2 < CGRectGetMaxX(keyboardFrame))
center.x = CGRectGetMaxX(keyboardFrame) + mag.bounds.size.width / 2;
} else if (mag.type == YYTextMagnifierTypeRanged) {
if (center.x < CGRectGetMaxX(keyboardFrame)) center.x = CGRectGetMaxX(keyboardFrame);
}
} break;
default: break;
}
}
return center;
}
/**
Capture screen snapshot and set it to magnifier.
@return Magnifier rotation radius.
*/
- (CGFloat)_updateMagnifier:(YYTextMagnifier *)mag {
UIApplication *app = YYTextSharedApplication();
if (!app) return 0;
UIView *hostView = mag.hostView;
UIWindow *hostWindow = [hostView isKindOfClass:[UIWindow class]] ? (id)hostView : hostView.window;
if (!hostView || !hostWindow) return 0;
CGPoint captureCenter = [self yy_convertPoint:mag.hostCaptureCenter fromViewOrWindow:hostView];
captureCenter = [self _correctedCaptureCenter:captureCenter];
CGRect captureRect = {.size = mag.snapshotSize};
captureRect.origin.x = captureCenter.x - captureRect.size.width / 2;
captureRect.origin.y = captureCenter.y - captureRect.size.height / 2;
CGAffineTransform trans = YYTextCGAffineTransformGetFromViews(hostView, self);
CGFloat rotation = YYTextCGAffineTransformGetRotation(trans);
if (mag.captureDisabled) {
if (!mag.snapshot || mag.snapshot.size.width > 1) {
static UIImage *placeholder;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
CGRect rect = mag.bounds;
rect.origin = CGPointZero;
UIGraphicsBeginImageContextWithOptions(rect.size, NO, 0);
CGContextRef context = UIGraphicsGetCurrentContext();
[[UIColor colorWithWhite:1 alpha:0.8] set];
CGContextFillRect(context, rect);
placeholder = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
});
mag.captureFadeAnimation = YES;
mag.snapshot = placeholder;
mag.captureFadeAnimation = NO;
}
return rotation;
}
UIGraphicsBeginImageContextWithOptions(captureRect.size, NO, 0);
CGContextRef context = UIGraphicsGetCurrentContext();
if (!context) return rotation;
CGPoint tp = CGPointMake(captureRect.size.width / 2, captureRect.size.height / 2);
tp = CGPointApplyAffineTransform(tp, CGAffineTransformMakeRotation(rotation));
CGContextRotateCTM(context, -rotation);
CGContextTranslateCTM(context, tp.x - captureCenter.x, tp.y - captureCenter.y);
NSMutableArray *windows = app.windows.mutableCopy;
UIWindow *keyWindow = app.keyWindow;
if (![windows containsObject:keyWindow]) [windows addObject:keyWindow];
[windows sortUsingComparator:^NSComparisonResult(UIWindow *w1, UIWindow *w2) {
if (w1.windowLevel < w2.windowLevel) return NSOrderedAscending;
else if (w1.windowLevel > w2.windowLevel) return NSOrderedDescending;
return NSOrderedSame;
}];
UIScreen *mainScreen = [UIScreen mainScreen];
for (UIWindow *window in windows) {
if (window.hidden || window.alpha <= 0.01) continue;
if (window.screen != mainScreen) continue;
if ([window isKindOfClass:self.class]) break; //don't capture window above self
CGContextSaveGState(context);
CGContextConcatCTM(context, YYTextCGAffineTransformGetFromViews(window, self));
[window.layer renderInContext:context]; //render
//[window drawViewHierarchyInRect:window.bounds afterScreenUpdates:NO]; //slower when capture whole window
CGContextRestoreGState(context);
}
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
if (mag.snapshot.size.width == 1) {
mag.captureFadeAnimation = YES;
}
mag.snapshot = image;
mag.captureFadeAnimation = NO;
return rotation;
}
- (void)showMagnifier:(YYTextMagnifier *)mag {
if (!mag) return;
if (mag.superview != self) [self addSubview:mag];
[self _updateWindowLevel];
CGFloat rotation = [self _updateMagnifier:mag];
CGPoint center = [self yy_convertPoint:mag.hostPopoverCenter fromViewOrWindow:mag.hostView];
CGAffineTransform trans = CGAffineTransformMakeRotation(rotation);
trans = CGAffineTransformScale(trans, 0.3, 0.3);
mag.transform = trans;
mag.center = center;
if (mag.type == YYTextMagnifierTypeRanged) {
mag.alpha = 0;
}
NSTimeInterval time = mag.type == YYTextMagnifierTypeCaret ? 0.08 : 0.1;
[UIView animateWithDuration:time delay:0 options:UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionBeginFromCurrentState animations:^{
if (mag.type == YYTextMagnifierTypeCaret) {
CGPoint newCenter = CGPointMake(0, -mag.fitSize.height / 2);
newCenter = CGPointApplyAffineTransform(newCenter, CGAffineTransformMakeRotation(rotation));
newCenter.x += center.x;
newCenter.y += center.y;
mag.center = [self _correctedCenter:newCenter forMagnifier:mag rotation:rotation];
} else {
mag.center = [self _correctedCenter:center forMagnifier:mag rotation:rotation];
}
mag.transform = CGAffineTransformMakeRotation(rotation);
mag.alpha = 1;
} completion:^(BOOL finished) {
}];
}
- (void)moveMagnifier:(YYTextMagnifier *)mag {
if (!mag) return;
[self _updateWindowLevel];
CGFloat rotation = [self _updateMagnifier:mag];
CGPoint center = [self yy_convertPoint:mag.hostPopoverCenter fromViewOrWindow:mag.hostView];
if (mag.type == YYTextMagnifierTypeCaret) {
CGPoint newCenter = CGPointMake(0, -mag.fitSize.height / 2);
newCenter = CGPointApplyAffineTransform(newCenter, CGAffineTransformMakeRotation(rotation));
newCenter.x += center.x;
newCenter.y += center.y;
mag.center = [self _correctedCenter:newCenter forMagnifier:mag rotation:rotation];
} else {
mag.center = [self _correctedCenter:center forMagnifier:mag rotation:rotation];
}
mag.transform = CGAffineTransformMakeRotation(rotation);
}
- (void)hideMagnifier:(YYTextMagnifier *)mag {
if (!mag) return;
if (mag.superview != self) return;
CGFloat rotation = [self _updateMagnifier:mag];
CGPoint center = [self yy_convertPoint:mag.hostPopoverCenter fromViewOrWindow:mag.hostView];
NSTimeInterval time = mag.type == YYTextMagnifierTypeCaret ? 0.20 : 0.15;
[UIView animateWithDuration:time delay:0 options:UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionBeginFromCurrentState animations:^{
CGAffineTransform trans = CGAffineTransformMakeRotation(rotation);
trans = CGAffineTransformScale(trans, 0.01, 0.01);
mag.transform = trans;
if (mag.type == YYTextMagnifierTypeCaret) {
CGPoint newCenter = CGPointMake(0, -mag.fitSize.height / 2);
newCenter = CGPointApplyAffineTransform(newCenter, CGAffineTransformMakeRotation(rotation));
newCenter.x += center.x;
newCenter.y += center.y;
mag.center = [self _correctedCenter:newCenter forMagnifier:mag rotation:rotation];
} else {
mag.center = [self _correctedCenter:center forMagnifier:mag rotation:rotation];
mag.alpha = 0;
}
} completion:^(BOOL finished) {
if (finished) {
[mag removeFromSuperview];
mag.transform = CGAffineTransformIdentity;
mag.alpha = 1;
}
}];
}
- (void)_updateSelectionGrabberDot:(YYSelectionGrabberDot *)dot selection:(YYTextSelectionView *)selection{
dot.mirror.hidden = YES;
if (selection.hostView.clipsToBounds == YES && dot.yy_visibleAlpha > 0.1) {
CGRect dotRect = [dot yy_convertRect:dot.bounds toViewOrWindow:self];
BOOL dotInKeyboard = NO;
CGRect keyboardFrame = [YYTextKeyboardManager defaultManager].keyboardFrame;
keyboardFrame = [[YYTextKeyboardManager defaultManager] convertRect:keyboardFrame toView:self];
if (!CGRectIsNull(keyboardFrame) && !CGRectIsEmpty(keyboardFrame)) {
CGRect inter = CGRectIntersection(dotRect, keyboardFrame);
if (!CGRectIsNull(inter) && (inter.size.width > 1 || inter.size.height > 1)) {
dotInKeyboard = YES;
}
}
if (!dotInKeyboard) {
CGRect hostRect = [selection.hostView convertRect:selection.hostView.bounds toView:self];
CGRect intersection = CGRectIntersection(dotRect, hostRect);
if (YYTextCGRectGetArea(intersection) < YYTextCGRectGetArea(dotRect)) {
CGFloat dist = YYTextCGPointGetDistanceToRect(YYTextCGRectGetCenter(dotRect), hostRect);
if (dist < CGRectGetWidth(dot.frame) * 0.55) {
dot.mirror.hidden = NO;
}
}
}
}
CGPoint center = [dot yy_convertPoint:CGPointMake(CGRectGetWidth(dot.frame) / 2, CGRectGetHeight(dot.frame) / 2) toViewOrWindow:self];
if (isnan(center.x) || isnan(center.y) || isinf(center.x) || isinf(center.y)) {
dot.mirror.hidden = YES;
} else {
dot.mirror.center = center;
}
}
- (void)showSelectionDot:(YYTextSelectionView *)selection {
if (!selection) return;
[self _updateWindowLevel];
[self insertSubview:selection.startGrabber.dot.mirror atIndex:0];
[self insertSubview:selection.endGrabber.dot.mirror atIndex:0];
[self _updateSelectionGrabberDot:selection.startGrabber.dot selection:selection];
[self _updateSelectionGrabberDot:selection.endGrabber.dot selection:selection];
}
- (void)hideSelectionDot:(YYTextSelectionView *)selection {
if (!selection) return;
[selection.startGrabber.dot.mirror removeFromSuperview];
[selection.endGrabber.dot.mirror removeFromSuperview];
}
@end
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