kmpdfkit_demo/PDFViewer/Source/PDFView/PDFListView.m

//
//  PDFListView.m
//  PDFReader
//
//  Copyright © 2014-2022 PDF Technologies, Inc. All Rights Reserved.
//
//  The PDF Reader Sample applications are licensed with a modified BSD license.
//  Please see License for details. This notice may not be removed from this file.
//

#import "PDFListView.h"
#import <MobileCoreServices/UTCoreTypes.h>
#import "PDFMagnifierView.h"

typedef NS_ENUM(NSInteger, PDFAnnotationDraggingType) {
    PDFAnnotationDraggingNone = 0,
    PDFAnnotationDraggingCenter,
    PDFAnnotationDraggingTopLeft,
    PDFAnnotationDraggingTopRight,
    PDFAnnotationDraggingBottomLeft,
    PDFAnnotationDraggingBottomRight,
    PDFAnnotationDraggingStart,
    PDFAnnotationDraggingEnd
};

@interface PDFListView ()

@property (nonatomic,assign) PDFAnnotationDraggingType draggingType;
@property (nonatomic,assign) CGPoint draggingPoint;

@property (nonatomic,assign) CGRect topLeftRect;
@property (nonatomic,assign) CGRect bottomLeftRect;
@property (nonatomic,assign) CGRect topRightRect;
@property (nonatomic,assign) CGRect bottomRightRect;
@property (nonatomic,assign) CGRect startPointRect;
@property (nonatomic,assign) CGRect endPointRect;

@property (nonatomic,assign) CGPoint addLinkPoint;
@property (nonatomic,assign) CGRect addLinkRect;

@property (nonatomic,retain) CPDFAnnotation *menuAnnotation;
@property (nonatomic,assign) CGPoint menuPoint;
@property (nonatomic,assign) CPDFPage *menuPage;

@property (nonatomic,retain) PDFMagnifierView *magnifierView;

@end

@implementation PDFListView

#pragma mark - Initializers

- (instancetype)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
    }
    return self;
}

- (void)dealloc {
    [_magnifierView release];
    [_activeAnnotation release];
    [_menuAnnotation release];
    [_addAnnotation release];
    [super dealloc];
}

#pragma mark - Accessors

- (void)setAnnotationMode:(PDFViewAnnotationMode)annotationMode {
    _annotationMode = annotationMode;
    
    if (PDFViewAnnotationModeHighlight == annotationMode ||
        PDFViewAnnotationModeUnderline == annotationMode ||
        PDFViewAnnotationModeStrikeout == annotationMode ||
        PDFViewAnnotationModeSquiggly == annotationMode) {
        self.textSelectionMode = YES;
    } else {
        self.textSelectionMode = NO;
    }
    
    if (PDFViewAnnotationModeLink == annotationMode) {
        self.scrollEnabled = NO;
        [self endDrawing];
    } else if (PDFViewAnnotationModeInk == annotationMode) {
        self.scrollEnabled = NO;
        [self beginDrawing];
    } else {
        if (self.activeAnnotation) {
            self.scrollEnabled = NO;
        } else {
            self.scrollEnabled = YES;
        }
        [self endDrawing];
        [self becomeFirstResponder];
    }
    
    // 取消注释选中状态
    if (PDFViewAnnotationModeNone != annotationMode) {
        CPDFPage *page = self.activeAnnotation.page;
        self.activeAnnotation = nil;
        [self setNeedsDisplayForPage:page];
    }
}

- (void)updateScrollEnabled {
    if (self.activeAnnotation) {
        self.scrollEnabled = NO;
    } else {
        if (PDFViewAnnotationModeLink == self.annotationMode) {
            self.scrollEnabled = NO;
        } else {
            self.scrollEnabled = YES;
        }
    }
}

- (NSString *)annotationUserName {
    NSString *annotationUserName = CPDFKitShareConfig.annotationAuthor;
    if (!annotationUserName || [annotationUserName length] <= 0) {
        annotationUserName = [[UIDevice currentDevice] name];
    }
    return annotationUserName ? : @"";
}

- (UIImage *)compressImage:(UIImage *)image size:(CGSize)size {
    CGFloat imageScale = 1.0;
    if (image.size.width > size.width || image.size.height > size.height) {
        imageScale = MIN(size.width / image.size.width, size.height / image.size.height);
    }
    CGSize newSize = CGSizeMake(image.size.width * imageScale, image.size.height * imageScale);
    UIGraphicsBeginImageContext(newSize);
    [image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

- (void)goToPageIndex:(NSInteger)pageIndex animated:(BOOL)animated {
    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformWillGoTo:pageIndex:)]) {
        [self.performDelegate PDFViewPerformWillGoTo:self pageIndex:pageIndex];
    }
    [super goToPageIndex:pageIndex animated:animated];
}

#pragma mark - Magnifier

- (void)addMagnifierAtPoint:(CGPoint)point forPage:(CPDFPage *)page {
    if (!_magnifierView) {
        _magnifierView = [[PDFMagnifierView alloc] init];
        _magnifierView.style = PDFMagnifierViewStyleCircle;
    }
    point = [self convertPoint:point fromPage:page];
    CGPoint center = [self convertPoint:point toView:self.superview];
    self.magnifierView.scale = 1.0;
    self.magnifierView.pointToMagnify = point;
    self.magnifierView.viewToMagnify = self;
    self.magnifierView.center = CGPointMake(center.x, center.y - self.magnifierView.frame.size.height/2.0 - 20);
    if ([self.magnifierView superview]) {
        [self.magnifierView setNeedsDisplay];
    } else {
        [self.superview addSubview:self.magnifierView];
    }
}

- (void)removeMagnifier {
    [self.magnifierView removeFromSuperview];
    self.magnifierView = nil;
}

#pragma mark - Rendering

- (void)drawPage:(CPDFPage *)page toContext:(CGContextRef)context {
    if (PDFViewAnnotationModeLink == self.annotationMode) {
        CGContextSetLineWidth(context, 1.0);
        CGContextSetStrokeColorWithColor(context, [UIColor colorWithRed:255.0/255.f green:255.0/255.f blue:255.0/255.f alpha:0.8].CGColor);
        CGContextSetFillColorWithColor(context, [UIColor colorWithRed:100.0/255.f green:149.0/255.f blue:237.0/255.f alpha:0.4].CGColor);
        CGContextAddRect(context, self.addLinkRect);
        CGContextDrawPath(context, kCGPathFillStroke);
    }
    
    if (self.activeAnnotation.page != page) {
        return;
    }
    CGSize dragDotSize = CGSizeMake(30, 30);
    CGContextSetStrokeColorWithColor(context, [UIColor colorWithRed:72.0/255.0 green:183.0/255.0 blue:247.0/255.0 alpha:1.0].CGColor);
    if ([self.activeAnnotation isKindOfClass:[CPDFLineAnnotation class]]) {
        CPDFLineAnnotation *line = (CPDFLineAnnotation *)self.activeAnnotation;
        CGPoint startPoint = line.startPoint;
        CGPoint endPoint   = line.endPoint;
        
        CGPoint tStartPoint = startPoint;
        CGPoint tEndPoint   = endPoint;
        
        float final = 40;
        if (fabs(tStartPoint.x - tEndPoint.x) < 0.00001) {
            if (tStartPoint.y > tEndPoint.y) {
                tStartPoint.y += final;
                tEndPoint.y -= final;
            } else {
                tStartPoint.y -= final;
                tEndPoint.y += final;
            }
        } else if (fabs(tStartPoint.y - tEndPoint.y) < 0.00001) {
            if (tStartPoint.x > tEndPoint.x) {
                tStartPoint.x += final;
                tEndPoint.x -= final;
            } else {
                tStartPoint.x -= final;
                tEndPoint.x += final;
            }
        } else {
            double k = (tEndPoint.y - tStartPoint.y)/(tEndPoint.x - tStartPoint.x);
            double atank = atan(k);
            if (endPoint.x > startPoint.x) {
                tEndPoint.x += cos(atank) * final;
                tEndPoint.y += sin(atank) * final;
                tStartPoint.x -= cos(atank) * final;
                tStartPoint.y -= sin(atank) * final;
            } else {
                tEndPoint.x -= cos(atank) * final;
                tEndPoint.y -= sin(atank) * final;
                tStartPoint.x += cos(atank) * final;
                tStartPoint.y += sin(atank) * final;
            }
        }
        
        CGContextSetLineWidth(context, 1.0);
        CGFloat dashArray[] = {3,3};
        CGContextSetLineDash(context, 0, dashArray, 2);
        CGContextMoveToPoint(context, tStartPoint.x, tStartPoint.y);
        CGContextAddLineToPoint(context, startPoint.x, startPoint.y);
        CGContextStrokePath(context);
        CGContextMoveToPoint(context, tEndPoint.x, tEndPoint.y);
        CGContextAddLineToPoint(context, endPoint.x, endPoint.y);
        CGContextStrokePath(context);
        
        CGRect startPointRect = CGRectMake(tStartPoint.x - dragDotSize.width/2.0,
                                           tStartPoint.y - dragDotSize.height/2.0,
                                           dragDotSize.width, dragDotSize.height);
        CGRect endPointRect = CGRectMake(tEndPoint.x - dragDotSize.width/2.0,
                                         tEndPoint.y - dragDotSize.height/2.0,
                                         dragDotSize.width, dragDotSize.height);
        
        UIImage *image = [UIImage imageNamed:@"annotation_drag_dot.png" inBundle:[NSBundle bundleForClass:self.class] compatibleWithTraitCollection:nil];
        CGImageRef dragDotImage = image.CGImage;
        
        CGContextDrawImage(context, startPointRect, dragDotImage);
        CGContextDrawImage(context, endPointRect, dragDotImage);
        
        self.startPointRect = startPointRect;
        self.endPointRect = endPointRect;
    } else if ([self.activeAnnotation isKindOfClass:[CPDFFreeTextAnnotation class]]) {
        CGRect rect = CGRectInset(self.activeAnnotation.bounds, -dragDotSize.width/2.0, -dragDotSize.height/2.0);
        CGContextSetLineWidth(context, 1.0);
        CGFloat lengths[] = {6, 6};
        CGContextSetLineDash(context, 0, lengths, 2);
        CGContextStrokeRect(context, rect);
        CGContextStrokePath(context);
        
        CGAffineTransform transform = [page transform];
        if (CPDFKitShareConfig.enableAnnotationNoRotate) {
            rect = CGRectApplyAffineTransform(rect, transform);
        }
        CGRect leftCenterRect = CGRectMake(CGRectGetMinX(rect)-dragDotSize.width/2.0,
                                           CGRectGetMidY(rect)-dragDotSize.height/2.0,
                                           dragDotSize.width, dragDotSize.height);
        CGRect rightCenterRect = CGRectMake(CGRectGetMaxX(rect)-dragDotSize.width/2.0,
                                            CGRectGetMidY(rect)-dragDotSize.height/2.0,
                                            dragDotSize.width, dragDotSize.height);
        if (CPDFKitShareConfig.enableAnnotationNoRotate) {
            leftCenterRect = CGRectApplyAffineTransform(leftCenterRect, CGAffineTransformInvert(transform));
            rightCenterRect = CGRectApplyAffineTransform(rightCenterRect, CGAffineTransformInvert(transform));
        }
        
        UIImage *image = [UIImage imageNamed:@"annotation_drag_dot.png" inBundle:[NSBundle bundleForClass:self.class] compatibleWithTraitCollection:nil];
        CGImageRef dragDotImage = image.CGImage;
        
        CGContextDrawImage(context, leftCenterRect, dragDotImage);
        CGContextDrawImage(context, rightCenterRect, dragDotImage);
        
        self.startPointRect = leftCenterRect;
        self.endPointRect = rightCenterRect;
    } else {
        CGRect rect = CGRectInset(self.activeAnnotation.bounds, -dragDotSize.width/2.0, -dragDotSize.height/2.0);
        CGContextSetLineWidth(context, 1.0);
        CGFloat lengths[] = {6, 6};
        CGContextSetLineDash(context, 0, lengths, 2);
        CGContextStrokeRect(context, rect);
        CGContextStrokePath(context);
        
        if ([self.activeAnnotation isKindOfClass:[CPDFSoundAnnotation class]] ||
            [self.activeAnnotation isKindOfClass:[CPDFMovieAnnotation class]]) {
            return;
        }
        
        CGRect topLeftRect = CGRectMake(CGRectGetMinX(rect)-dragDotSize.width/2.0,
                                        CGRectGetMaxY(rect)-dragDotSize.height/2.0,
                                        dragDotSize.width, dragDotSize.height);
        CGRect bottomLeftRect = CGRectMake(CGRectGetMinX(rect)-dragDotSize.width/2.0,
                                           CGRectGetMinY(rect)-dragDotSize.height/2.0,
                                           dragDotSize.width, dragDotSize.height);
        CGRect topRightRect = CGRectMake(CGRectGetMaxX(rect)-dragDotSize.width/2.0,
                                         CGRectGetMaxY(rect)-dragDotSize.height/2.0,
                                         dragDotSize.width, dragDotSize.height);
        CGRect bottomRightRect = CGRectMake(CGRectGetMaxX(rect)-dragDotSize.width/2.0,
                                            CGRectGetMinY(rect)-dragDotSize.height/2.0,
                                            dragDotSize.width, dragDotSize.height);
        
        UIImage *image = [UIImage imageNamed:@"annotation_drag_dot.png" inBundle:[NSBundle bundleForClass:self.class] compatibleWithTraitCollection:nil];
        CGImageRef dragDotImage = image.CGImage;
        
        CGContextDrawImage(context, topLeftRect, dragDotImage);
        CGContextDrawImage(context, bottomLeftRect, dragDotImage);
        CGContextDrawImage(context, topRightRect, dragDotImage);
        CGContextDrawImage(context, bottomRightRect, dragDotImage);
        
        self.topLeftRect = topLeftRect;
        self.bottomLeftRect = bottomLeftRect;
        self.topRightRect = topRightRect;
        self.bottomRightRect = bottomRightRect;
    }
}

#pragma mark - Touch

- (void)touchBeganAtPoint:(CGPoint)point forPage:(CPDFPage *)page {
    if (self.textSelectionMode) {
        // 文本选取模式
    } else {
        self.addLinkPoint = point;
        self.addLinkRect = CGRectZero;
        
        self.draggingType = PDFAnnotationDraggingNone;
        if (!self.activeAnnotation || self.activeAnnotation.page != page) {
            return;
        }
        CGRect topLeftRect = CGRectInset(self.topLeftRect, -5, -5);
        CGRect bottomLeftRect = CGRectInset(self.bottomLeftRect, -5, -5);
        CGRect topRightRect = CGRectInset(self.topRightRect, -5, -5);
        CGRect bottomRightRect = CGRectInset(self.bottomRightRect, -5, -5);
        CGRect startPointRect = CGRectInset(self.startPointRect, -5, -5);
        CGRect endPointRect = CGRectInset(self.endPointRect, -5, -5);
        if (CGRectContainsPoint(topLeftRect, point)) {
            self.draggingType = PDFAnnotationDraggingTopLeft;
        } else if (CGRectContainsPoint(bottomLeftRect, point)) {
            self.draggingType = PDFAnnotationDraggingBottomLeft;
        } else if (CGRectContainsPoint(topRightRect, point)) {
            self.draggingType = PDFAnnotationDraggingTopRight;
        } else if (CGRectContainsPoint(bottomRightRect, point)) {
            self.draggingType = PDFAnnotationDraggingBottomRight;
        } else if (CGRectContainsPoint(startPointRect, point)) {
            self.draggingType = PDFAnnotationDraggingStart;
        } else if (CGRectContainsPoint(endPointRect, point)) {
            self.draggingType = PDFAnnotationDraggingEnd;
        } else if ([page annotation:self.activeAnnotation atPoint:point]) {
            self.draggingType = PDFAnnotationDraggingCenter;
        }
        self.draggingPoint = point;
        
        if (PDFAnnotationDraggingCenter == self.draggingType) {
            if ([self.activeAnnotation isKindOfClass:[CPDFFreeTextAnnotation class]] ||
                [self.activeAnnotation isKindOfClass:[CPDFSignatureAnnotation class]]) {
                [self addMagnifierAtPoint:point forPage:page];
            }
        }
    }
}

- (void)touchMovedAtPoint:(CGPoint)point forPage:(CPDFPage *)page {
    if (self.textSelectionMode) {
        // 文本选取模式
    } else if (PDFAnnotationDraggingNone != self.draggingType) {
        [self moveAnnotation:self.activeAnnotation fromPoint:self.draggingPoint toPoint:point forType:self.draggingType];
        [self setNeedsDisplayForPage:page];
        self.draggingPoint = point;
        
        if (PDFAnnotationDraggingCenter == self.draggingType) {
            if ([self.activeAnnotation isKindOfClass:[CPDFFreeTextAnnotation class]] ||
                [self.activeAnnotation isKindOfClass:[CPDFSignatureAnnotation class]]) {
                [self addMagnifierAtPoint:point forPage:page];
            }
        }
    } else if (PDFViewAnnotationModeLink == self.annotationMode) {
        CGRect rect = CGRectZero;
        if (point.x > self.addLinkPoint.x) {
            rect.origin.x = self.addLinkPoint.x;
            rect.size.width = point.x-self.addLinkPoint.x;
        } else {
            rect.origin.x = point.x;
            rect.size.width = self.addLinkPoint.x-point.x;
        }
        if (point.y > self.addLinkPoint.y) {
            rect.origin.y = self.addLinkPoint.y;
            rect.size.height = point.y-self.addLinkPoint.y;
        } else {
            rect.origin.y = point.y;
            rect.size.height = self.addLinkPoint.y-point.y;
        }
        self.addLinkRect = rect;
        [self setNeedsDisplayForPage:page];
    }
}

- (void)touchEndedAtPoint:(CGPoint)point forPage:(CPDFPage *)page {
    if (self.textSelectionMode) {
        // 文本选取模式，添加Markup注释
        if (self.currentSelection) {
            [self addAnnotation:self.annotationMode atPoint:point forPage:page];
        } else {
            CPDFAnnotation *annotation = [page annotationAtPoint:point];
            if ([annotation isKindOfClass:[CPDFMarkupAnnotation class]]) {
                [self showMenuForAnnotation:annotation];
            }
        }
    } else if (PDFAnnotationDraggingNone == self.draggingType) {
        if (self.activeAnnotation) {
            CPDFPage *previousPage = self.activeAnnotation.page;
            self.activeAnnotation = nil;
            [self setNeedsDisplayForPage:previousPage];
            [self updateScrollEnabled];
        } else {
            if (PDFViewAnnotationModeNone == self.annotationMode) {
                CPDFAnnotation *annotation = [page annotationAtPoint:point];
                if ([annotation isKindOfClass:[CPDFTextAnnotation class]]) {
                    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformOpenNote:forAnnotation:)]) {
                        [self.performDelegate PDFViewPerformOpenNote:self forAnnotation:annotation];
                    }
                } else if ([annotation isKindOfClass:[CPDFMarkupAnnotation class]]) {
                    if (CGRectContainsPoint(annotation.bounds, point)) {
                        [self showMenuForAnnotation:annotation];
                    } else {
                        if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformPopup:forAnnotation:)]) {
                            [self.performDelegate PDFViewPerformPopup:self forAnnotation:(CPDFMarkupAnnotation *)annotation];
                        }
                    }
                } else if ([annotation isKindOfClass:[CPDFLinkAnnotation class]]) {
                    [super touchEndedAtPoint:point forPage:page];
                } else if ([annotation isKindOfClass:[CPDFMovieAnnotation class]]) {
                    [super touchEndedAtPoint:point forPage:page];
                } else if ([annotation isKindOfClass:[CPDFWidgetAnnotation class]]) {
                    if ([annotation isKindOfClass:[CPDFSignatureWidgetAnnotation class]]) {
                        if ([(CPDFSignatureWidgetAnnotation *)annotation isSigned]) {
                            [self showMenuForAnnotation:annotation];
                        } else {
                            if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformSignatureWidget:forAnnotation:)]) {
                                [self.performDelegate PDFViewPerformSignatureWidget:self forAnnotation:(CPDFSignatureWidgetAnnotation *)annotation];
                            }
                        }
                    } else {
                        [super touchEndedAtPoint:point forPage:page];
                    }
                } else {
                    self.activeAnnotation = annotation;
                    [self setNeedsDisplayForPage:page];
                    [self updateScrollEnabled];
                    
                    [self showMenuForAnnotation:annotation];
                    
                    if (!self.activeAnnotation) {
                        if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformTouchEnded:)]) {
                            [self.performDelegate PDFViewPerformTouchEnded:self];
                        }
                    }
                }
            } else if (PDFViewAnnotationModeLink == self.annotationMode) {
                if (CGRectIsEmpty(self.addLinkRect)) {
                    CPDFAnnotation *annotation = [page annotationAtPoint:point];
                    if ([annotation isKindOfClass:[CPDFLinkAnnotation class]]) {
                        self.activeAnnotation = annotation;
                        [self setNeedsDisplayForPage:page];
                        [self updateScrollEnabled];
                        
                        [self showMenuForAnnotation:annotation];
                    }
                } else {
                    [self addAnnotationLinkAtPoint:point forPage:page];
                }
            } else if (PDFViewAnnotationModeFreeText == self.annotationMode) {
                [self addAnnotationFreeTextAtPoint:point forPage:page];
            } else if (PDFViewAnnotationModeStamp == self.annotationMode) {
                [self addAnnotationAtPoint:point forPage:page];
                if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformTouchEnded:)]) {
                    [self.performDelegate PDFViewPerformTouchEnded:self];
                }
            } else if (PDFViewAnnotationModeImage == self.annotationMode) {
                [self addAnnotationAtPoint:point forPage:page];
                if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformTouchEnded:)]) {
                    [self.performDelegate PDFViewPerformTouchEnded:self];
                }
            } else {
                [self addAnnotation:self.annotationMode atPoint:point forPage:page];
            }
        }
    } else {
        // 注释修改大小后，重新生成外观
        if (PDFAnnotationDraggingCenter != self.draggingType) {
            if ([self.activeAnnotation isKindOfClass:[CPDFFreeTextAnnotation class]] ||
                [self.activeAnnotation isKindOfClass:[CPDFStampAnnotation class]] ||
                [self.activeAnnotation isKindOfClass:[CPDFSignatureAnnotation class]]) {
                [self.activeAnnotation updateAppearanceStream];
                [self setNeedsDisplayForPage:page];
            }
        }
        
        self.draggingType = PDFAnnotationDraggingNone;
        
        [self showMenuForAnnotation:self.activeAnnotation];
    }
    [self removeMagnifier];
}

- (void)touchCancelledAtPoint:(CGPoint)point forPage:(CPDFPage *)page {
    self.draggingType = PDFAnnotationDraggingNone;
    [self removeMagnifier];
    
}

#pragma mark - Annotation

- (void)moveAnnotation:(CPDFAnnotation *)annotation fromPoint:(CGPoint)fromPoint toPoint:(CGPoint)toPoint forType:(PDFAnnotationDraggingType)draggingType {
    CGRect bounds = annotation.bounds;
    CGPoint offsetPoint =  CGPointMake(toPoint.x - fromPoint.x, toPoint.y - fromPoint.y);
    CGFloat scale = bounds.size.height/bounds.size.width;
    if ([annotation isKindOfClass:[CPDFLineAnnotation class]]) {
        CPDFLineAnnotation *line = (CPDFLineAnnotation *)annotation;
        CGPoint startPoint = line.startPoint;
        CGPoint endPoint   = line.endPoint;
        switch (draggingType) {
            case PDFAnnotationDraggingCenter:
            {
                startPoint.x += offsetPoint.x;
                startPoint.y += offsetPoint.y;
                endPoint.x += offsetPoint.x;
                endPoint.y += offsetPoint.y;
            }
                break;
            case PDFAnnotationDraggingStart:
            {
                startPoint.x += offsetPoint.x;
                startPoint.y += offsetPoint.y;
            }
                break;
            case PDFAnnotationDraggingEnd:
            {
                endPoint.x += offsetPoint.x;
                endPoint.y += offsetPoint.y;
            }
                break;
            default:
            break;
        }
        line.startPoint = startPoint;
        line.endPoint = endPoint;
        bounds = line.bounds;
    } else if ([annotation isKindOfClass:[CPDFFreeTextAnnotation class]]) {
        CGAffineTransform transform = [annotation.page transform];
        if (CPDFKitShareConfig.enableAnnotationNoRotate) {
            bounds = CGRectApplyAffineTransform(bounds, transform);
            toPoint = CGPointApplyAffineTransform(toPoint, transform);
            fromPoint = CGPointApplyAffineTransform(fromPoint, transform);
            offsetPoint =  CGPointMake(toPoint.x - fromPoint.x, toPoint.y - fromPoint.y);
        }
        CPDFFreeTextAnnotation *freeText = (CPDFFreeTextAnnotation *)annotation;
        NSDictionary *attributes = @{NSFontAttributeName : freeText.font};
        switch (draggingType) {
            case PDFAnnotationDraggingCenter:
            {
                bounds.origin.x += offsetPoint.x;
                bounds.origin.y += offsetPoint.y;
            }
                break;
            case PDFAnnotationDraggingStart:
            {
                CGFloat x = CGRectGetMaxX(bounds);
                bounds.size.width -= offsetPoint.x;
                bounds.size.width = MAX(bounds.size.width, 5.0);
                bounds.origin.x = x - bounds.size.width;
                
                CGRect rect = [freeText.contents boundingRectWithSize:CGSizeMake(bounds.size.width, CGFLOAT_MAX)
                                                              options:NSStringDrawingUsesLineFragmentOrigin
                                                           attributes:attributes
                                                              context:nil];
                bounds.origin.y = CGRectGetMaxY(bounds) - rect.size.height;
                bounds.size.height = rect.size.height;
            }
                break;
            case PDFAnnotationDraggingEnd:
            {
                bounds.size.width += offsetPoint.x;
                bounds.size.width = MAX(bounds.size.width, 5.0);
                
                CGRect rect = [freeText.contents boundingRectWithSize:CGSizeMake(bounds.size.width, CGFLOAT_MAX)
                                                              options:NSStringDrawingUsesLineFragmentOrigin
                                                           attributes:attributes
                                                              context:nil];
                bounds.origin.y = CGRectGetMaxY(bounds) - rect.size.height;
                bounds.size.height = rect.size.height;
            }
                break;
            default:
            break;
        }
        if (CPDFKitShareConfig.enableAnnotationNoRotate) {
            bounds = CGRectApplyAffineTransform(bounds, CGAffineTransformInvert(transform));
        }
    } else {
        switch (draggingType) {
            case PDFAnnotationDraggingCenter:
            {
                bounds.origin.x += offsetPoint.x;
                bounds.origin.y += offsetPoint.y;
            }
                break;
            case PDFAnnotationDraggingTopLeft:
            {
                CGFloat x = CGRectGetMaxX(bounds);
                bounds.size.width -= offsetPoint.x;
                bounds.size.height += offsetPoint.y;
                
                if ([annotation isKindOfClass:[CPDFStampAnnotation class]] ||
                    [annotation isKindOfClass:[CPDFSignatureAnnotation class]] ||
                    [annotation isKindOfClass:[CPDFInkAnnotation class]]) {
                    bounds.size.height = bounds.size.width*scale;
                    bounds.size.width = MAX(bounds.size.width, 5.0);
                    bounds.size.height = MAX(bounds.size.height, 5.0*scale);
                } else {
                    bounds.size.width = MAX(bounds.size.width, 5.0);
                    bounds.size.height = MAX(bounds.size.height, 5.0);
                }
                
                bounds.origin.x = x - bounds.size.width;
            }
                break;
            case PDFAnnotationDraggingBottomLeft:
            {
                CGFloat x = CGRectGetMaxX(bounds);
                CGFloat y = CGRectGetMaxY(bounds);
                bounds.size.width -= offsetPoint.x;
                bounds.size.height -= offsetPoint.y;
                
                if ([annotation isKindOfClass:[CPDFStampAnnotation class]] ||
                    [annotation isKindOfClass:[CPDFSignatureAnnotation class]] ||
                    [annotation isKindOfClass:[CPDFInkAnnotation class]]) {
                    bounds.size.height = bounds.size.width*scale;
                    bounds.size.width = MAX(bounds.size.width, 5.0);
                    bounds.size.height = MAX(bounds.size.height, 5.0*scale);
                } else {
                    bounds.size.width = MAX(bounds.size.width, 5.0);
                    bounds.size.height = MAX(bounds.size.height, 5.0);
                }
                
                bounds.origin.x = x - bounds.size.width;
                bounds.origin.y = y - bounds.size.height;
            }
                break;
            case PDFAnnotationDraggingTopRight:
            {
                bounds.size.width += offsetPoint.x;
                bounds.size.height += offsetPoint.y;
                
                if ([annotation isKindOfClass:[CPDFStampAnnotation class]] ||
                    [annotation isKindOfClass:[CPDFSignatureAnnotation class]] ||
                    [annotation isKindOfClass:[CPDFInkAnnotation class]]) {
                    bounds.size.height = bounds.size.width*scale;
                    bounds.size.width = MAX(bounds.size.width, 5.0);
                    bounds.size.height = MAX(bounds.size.height, 5.0*scale);
                } else {
                    bounds.size.width = MAX(bounds.size.width, 5.0);
                    bounds.size.height = MAX(bounds.size.height, 5.0);
                }
            }
                break;
            case PDFAnnotationDraggingBottomRight:
            {
                CGFloat y = CGRectGetMaxY(bounds);
                bounds.size.width += offsetPoint.x;
                bounds.size.height -= offsetPoint.y;
                
                if ([annotation isKindOfClass:[CPDFStampAnnotation class]] ||
                    [annotation isKindOfClass:[CPDFSignatureAnnotation class]] ||
                    [annotation isKindOfClass:[CPDFInkAnnotation class]]) {
                    bounds.size.height = bounds.size.width*scale;
                    bounds.size.width = MAX(bounds.size.width, 5.0);
                    bounds.size.height = MAX(bounds.size.height, 5.0*scale);
                } else {
                    bounds.size.width = MAX(bounds.size.width, 5.0);
                    bounds.size.height = MAX(bounds.size.height, 5.0);
                }
                
                bounds.origin.y = y - bounds.size.height;
            }
                break;
            default:
                break;
        }
        
        if (CGRectGetMinX(bounds) < 0) {
            bounds.origin.x = 0;
        }
        if (CGRectGetMaxX(bounds) > CGRectGetWidth(annotation.page.bounds)) {
            bounds.origin.x = CGRectGetWidth(annotation.page.bounds) - CGRectGetWidth(bounds);
        }
        if (CGRectGetMinY(bounds) < 0) {
            bounds.origin.y = 0;
        }
        if (CGRectGetMaxY(bounds) > CGRectGetHeight(annotation.page.bounds)) {
            bounds.origin.y = CGRectGetHeight(annotation.page.bounds) - CGRectGetHeight(bounds);
        }
    }
    annotation.bounds = bounds;
}

- (void)addAnnotation:(PDFViewAnnotationMode)mode atPoint:(CGPoint)point forPage:(CPDFPage *)page {
    CPDFAnnotation *annotation = nil;
    switch (mode) {
        case PDFViewAnnotationModeNote:
        {
            CGFloat width = 57.0/1.5;
            annotation = [[[CPDFTextAnnotation alloc] initWithDocument:self.document] autorelease];
            annotation.bounds = CGRectMake(point.x-width/2.0, point.y-width/2.0, width, width);
        }
            break;
        case PDFViewAnnotationModeHighlight:
        {
            if (!self.currentSelection) {
                return;
            }
            NSMutableArray *quadrilateralPoints = [NSMutableArray array];
            annotation = [[[CPDFMarkupAnnotation alloc] initWithDocument:self.document markupType:CPDFMarkupTypeHighlight] autorelease];
            for (CPDFSelection *selection in self.currentSelection.selectionsByLine) {
                CGRect bounds = selection.bounds;
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMaxY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMaxY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMinY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMinY(bounds))]];
            }
            [(CPDFMarkupAnnotation *)annotation setQuadrilateralPoints:quadrilateralPoints];
            [(CPDFMarkupAnnotation *)annotation setMarkupText:self.currentSelection.string];
            [self clearSelection];
        }
            break;
        case PDFViewAnnotationModeUnderline:
        {
            if (!self.currentSelection) {
                return;
            }
            NSMutableArray *quadrilateralPoints = [NSMutableArray array];
            annotation = [[[CPDFMarkupAnnotation alloc] initWithDocument:self.document markupType:CPDFMarkupTypeUnderline] autorelease];
            for (CPDFSelection *selection in self.currentSelection.selectionsByLine) {
                CGRect bounds = selection.bounds;
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMaxY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMaxY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMinY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMinY(bounds))]];
            }
            [(CPDFMarkupAnnotation *)annotation setQuadrilateralPoints:quadrilateralPoints];
            [(CPDFMarkupAnnotation *)annotation setMarkupText:self.currentSelection.string];
            [self clearSelection];
        }
            break;
        case PDFViewAnnotationModeStrikeout:
        {
            if (!self.currentSelection) {
                return;
            }
            NSMutableArray *quadrilateralPoints = [NSMutableArray array];
            annotation = [[[CPDFMarkupAnnotation alloc] initWithDocument:self.document markupType:CPDFMarkupTypeStrikeOut] autorelease];
            for (CPDFSelection *selection in self.currentSelection.selectionsByLine) {
                CGRect bounds = selection.bounds;
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMaxY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMaxY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMinY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMinY(bounds))]];
            }
            [(CPDFMarkupAnnotation *)annotation setQuadrilateralPoints:quadrilateralPoints];
            [(CPDFMarkupAnnotation *)annotation setMarkupText:self.currentSelection.string];
            [self clearSelection];
        }
            break;
        case PDFViewAnnotationModeSquiggly:
        {
            if (!self.currentSelection) {
                return;
            }
            NSMutableArray *quadrilateralPoints = [NSMutableArray array];
            annotation = [[[CPDFMarkupAnnotation alloc] initWithDocument:self.document markupType:CPDFMarkupTypeSquiggly] autorelease];
            for (CPDFSelection *selection in self.currentSelection.selectionsByLine) {
                CGRect bounds = selection.bounds;
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMaxY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMaxY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMinY(bounds))]];
                [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMinY(bounds))]];
            }
            [(CPDFMarkupAnnotation *)annotation setQuadrilateralPoints:quadrilateralPoints];
            [(CPDFMarkupAnnotation *)annotation setMarkupText:self.currentSelection.string];
            [self clearSelection];
        }
            break;
        case PDFViewAnnotationModeCircle:
        {
            annotation = [[[CPDFCircleAnnotation alloc] initWithDocument:self.document] autorelease];
            annotation.bounds = CGRectMake(point.x-50, point.y-50, 100, 100);
        }
            break;
        case PDFViewAnnotationModeSquare:
        {
            annotation = [[[CPDFSquareAnnotation alloc] initWithDocument:self.document] autorelease];
            annotation.bounds = CGRectMake(point.x-50, point.y-50, 100, 100);
        }
            break;
        case PDFViewAnnotationModeArrow:
        {
            annotation = [[[CPDFLineAnnotation alloc] initWithDocument:self.document] autorelease];
            [(CPDFLineAnnotation *)annotation setStartPoint:CGPointMake(point.x-50, point.y)];
            [(CPDFLineAnnotation *)annotation setEndPoint:CGPointMake(point.x+50, point.y)];
            [(CPDFLineAnnotation *)annotation setEndLineStyle:CPDFLineStyleClosedArrow];
        }
            break;
        case PDFViewAnnotationModeLine:
        {
            annotation = [[[CPDFLineAnnotation alloc] initWithDocument:self.document] autorelease];
            [(CPDFLineAnnotation *)annotation setStartPoint:CGPointMake(point.x-50, point.y)];
            [(CPDFLineAnnotation *)annotation setEndPoint:CGPointMake(point.x+50, point.y)];
        }
            break;
        default:
            break;
    }
    
    if (!annotation) {
        return;
    }
    [annotation setModificationDate:[NSDate date]];
    [annotation setUserName:[self annotationUserName]];
    [page addAnnotation:annotation];
    
    if ([annotation isKindOfClass:[CPDFTextAnnotation class]]) {
        [self setNeedsDisplayForPage:page];
        if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformOpenNote:forAnnotation:)]) {
            [self.performDelegate PDFViewPerformOpenNote:self forAnnotation:annotation];
        }
    } else if ([annotation isKindOfClass:[CPDFMarkupAnnotation class]]) {
        [self setNeedsDisplayForPage:page];
    } else {
        self.activeAnnotation = annotation;
        [self setNeedsDisplayForPage:page];
        [self updateScrollEnabled];
        
        [self showMenuForAnnotation:annotation];
    }
}

- (void)addAnnotationLinkAtPoint:(CGPoint)point forPage:(CPDFPage *)page {
    CPDFLinkAnnotation *annotation = [[[CPDFLinkAnnotation alloc] initWithDocument:self.document] autorelease];
    annotation.bounds = self.addLinkRect;
    [annotation setModificationDate:[NSDate date]];
    [annotation setUserName:[self annotationUserName]];
    [page addAnnotation:annotation];
    
    self.addLinkPoint = CGPointZero;
    self.addLinkRect = CGRectZero;
    [self setNeedsDisplayForPage:page];
    
    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformEditLink:forAnnotation:)]) {
        [self.performDelegate PDFViewPerformEditLink:self forAnnotation:annotation];
    }
}

- (void)addAnnotationFreeTextAtPoint:(CGPoint)point forPage:(CPDFPage *)page {
    CPDFFreeTextAnnotation *annotation = [[[CPDFFreeTextAnnotation alloc] initWithDocument:self.document] autorelease];
    if (CPDFKitShareConfig.enableAnnotationNoRotate) {
        CGFloat width;
        CGAffineTransform transform = [page transform];
        point = CGPointApplyAffineTransform(point, transform);
        if (page.rotation == 90 ||
            page.rotation == 270) {
            width = CGRectGetMaxY(page.bounds) - point.x - 20;
        } else {
            width = CGRectGetMaxX(page.bounds) - point.x - 20;
        }
        CGRect bounds = CGRectMake(point.x, point.y, width, annotation.font.pointSize);
        bounds = CGRectApplyAffineTransform(bounds, CGAffineTransformInvert(transform));
        annotation.bounds = bounds;
    } else {
        CGFloat width = CGRectGetMaxX(page.bounds) - point.x - 20;
        annotation.bounds = CGRectMake(point.x, point.y, width, annotation.font.pointSize);
    }
    [annotation setModificationDate:[NSDate date]];
    [annotation setUserName:[self annotationUserName]];
    [page addAnnotation:annotation];
    
    [self editAnnotationFreeText:annotation];
}

- (void)addAnnotationAtPoint:(CGPoint)point forPage:(CPDFPage *)page {
    CPDFAnnotation *annotation = self.addAnnotation;
    if (!annotation) {
        return;
    }
    annotation.bounds = CGRectMake(point.x-annotation.bounds.size.width/2.0,
                                   point.y-annotation.bounds.size.height/2.0,
                                   annotation.bounds.size.width, annotation.bounds.size.height);
    [annotation setModificationDate:[NSDate date]];
    [annotation setUserName:[self annotationUserName]];
    [page addAnnotation:annotation];
    
    self.activeAnnotation = annotation;
    [self setNeedsDisplayForPage:page];
    [self updateScrollEnabled];
    
    [self showMenuForAnnotation:annotation];
    self.addAnnotation = nil;
}

- (void)addAnnotation:(CPDFAnnotation *)annotation forPage:(CPDFPage *)page {
    if (!annotation || !page) {
        return;
    }
    [annotation setModificationDate:[NSDate date]];
    [annotation setUserName:[self annotationUserName]];
    [page addAnnotation:annotation];
    
    self.activeAnnotation = annotation;
    [self setNeedsDisplayForPage:page];
    [self updateScrollEnabled];
    
    [self showMenuForAnnotation:annotation];
}

- (void)addAnnotation:(CPDFAnnotation *)annotation {
    CPDFPage *page = [self.document pageAtIndex:self.currentPageIndex];
    CGPoint center = [self convertPoint:self.center toPage:page];
    if (CGPointEqualToPoint(center, CGPointZero)) {
        return;
    }
    CGRect bounds = annotation.bounds;
    bounds.origin.x = center.x-bounds.size.width/2.0;
    bounds.origin.y = center.y-bounds.size.height/2.0;
    bounds.origin.y = MIN(MAX(0, bounds.origin.y), page.bounds.size.height-bounds.size.height);
    annotation.bounds = bounds;
    [self addAnnotation:annotation forPage:page];
}

#pragma mark - Annotation Menu

- (BOOL)canBecomeFirstResponder {
    return YES;
}

- (void)showMenuForAnnotation:(CPDFAnnotation *)annotation {
    self.menuAnnotation = annotation;
    if (!annotation) {
        [UIMenuController sharedMenuController].menuItems = nil;
        [[UIMenuController sharedMenuController] setMenuVisible:NO animated:YES];
        return;
    }
    
    NSMutableArray *menuItems = [NSMutableArray array];
    UIMenuItem *colorItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Color", nil)
                                                        action:@selector(colorItemAction:)] autorelease];
    UIMenuItem *opacityItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Opacity", nil)
                                                          action:@selector(opacityItemAction:)] autorelease];
    UIMenuItem *copyItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Copy", nil)
                                                       action:@selector(copyItemAction:)] autorelease];
    UIMenuItem *noteItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Note", nil)
                                                       action:@selector(noteItemAction:)] autorelease];
    UIMenuItem *deleteItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Delete", nil)
                                                         action:@selector(deleteItemAction:)] autorelease];
    if ([annotation isKindOfClass:[CPDFMarkupAnnotation class]]) {
        UIMenuItem *shareItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Share", nil)
                                                            action:@selector(shareItemAction:)] autorelease];
        [menuItems addObject:colorItem];
        [menuItems addObject:opacityItem];
        [menuItems addObject:copyItem];
        [menuItems addObject:shareItem];
        [menuItems addObject:noteItem];
        [menuItems addObject:deleteItem];
    } else if ([annotation isKindOfClass:[CPDFStampAnnotation class]]) {
        if (CPDFStampTypeImage == [(CPDFStampAnnotation *)annotation stampType]) {
            UIMenuItem *saveItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Save", nil)
                                                               action:@selector(saveItemAction:)] autorelease];
            [menuItems addObject:saveItem];
            [menuItems addObject:copyItem];
        }
        [menuItems addObject:deleteItem];
    } else if ([annotation isKindOfClass:[CPDFLinkAnnotation class]]) {
        UIMenuItem *editItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Edit", nil)
                                                           action:@selector(editItemAction:)] autorelease];
        [menuItems addObject:editItem];
        [menuItems addObject:deleteItem];
    } else if ([annotation isKindOfClass:[CPDFFreeTextAnnotation class]]) {
        UIMenuItem *editItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Edit", nil)
                                                           action:@selector(editItemAction:)] autorelease];
        [menuItems addObject:editItem];
        [menuItems addObject:copyItem];
        [menuItems addObject:deleteItem];
    } else if ([annotation isKindOfClass:[CPDFSoundAnnotation class]] ||
               [annotation isKindOfClass:[CPDFMovieAnnotation class]]) {
        [menuItems addObject:deleteItem];
    } else if ([annotation isKindOfClass:[CPDFSignatureAnnotation class]]) {
        UIMenuItem *cancelItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Cancel", nil)
                                                             action:@selector(deleteItemAction:)] autorelease];
        UIMenuItem *addHereItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Add here", nil)
                                                              action:@selector(addHereItemAction:)] autorelease];
        [menuItems addObject:cancelItem];
        [menuItems addObject:addHereItem];
    } else if ([annotation isKindOfClass:[CPDFLineAnnotation class]] ||
               [annotation isKindOfClass:[CPDFSquareAnnotation class]] ||
               [annotation isKindOfClass:[CPDFCircleAnnotation class]] ||
               [annotation isKindOfClass:[CPDFInkAnnotation class]]) {
        UIMenuItem *thicknessItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Thickness", nil)
                                                                action:@selector(thicknessItemAction:)] autorelease];
        [menuItems addObject:noteItem];
        [menuItems addObject:colorItem];
        [menuItems addObject:thicknessItem];
        [menuItems addObject:opacityItem];
        [menuItems addObject:deleteItem];
    } else if ([annotation isKindOfClass:[CPDFSignatureWidgetAnnotation class]]) {
        UIMenuItem *deleteItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Delete", nil)
                                                             action:@selector(signatureWidgetDeleteItemAction:)] autorelease];
        [menuItems addObject:deleteItem];
    }
    if (menuItems.count <= 0) {
        return;
    }
    
    CGRect bounds = annotation.bounds;
    bounds = CGRectInset(bounds, -15, -15);
    CGRect rect = [self convertRect:bounds fromPage:annotation.page];
    [self becomeFirstResponder];
    [UIMenuController sharedMenuController].menuItems = menuItems;
    [[UIMenuController sharedMenuController] setTargetRect:rect inView:self];
    [[UIMenuController sharedMenuController] setMenuVisible:YES animated:YES];
}

- (void)signatureWidgetDeleteItemAction:(id)sender {
    if ([self.menuAnnotation isKindOfClass:[CPDFSignatureWidgetAnnotation class]]) {
        [(CPDFSignatureWidgetAnnotation *)self.menuAnnotation reset];
        [self setNeedsDisplayForPage:self.menuAnnotation.page];
    }
}

- (void)colorItemAction:(id)sender {
    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformChangeColor:forAnnotation:)]) {
        [self.performDelegate PDFViewPerformChangeColor:self forAnnotation:self.menuAnnotation];
    }
}

- (void)opacityItemAction:(id)sender {
    NSMutableArray *menuItems = [NSMutableArray array];
    UIMenuItem *opacity25Item = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"25%", nil)
                                                            action:@selector(opacity25ItemAction:)] autorelease];
    UIMenuItem *opacity50Item = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"50%", nil)
                                                            action:@selector(opacity50ItemAction:)] autorelease];
    UIMenuItem *opacity75Item = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"75%", nil)
                                                            action:@selector(opacity75ItemAction:)] autorelease];
    UIMenuItem *opacity100Item = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"100%", nil)
                                                             action:@selector(opacity100ItemAction:)] autorelease];
    [menuItems addObject:opacity25Item];
    [menuItems addObject:opacity50Item];
    [menuItems addObject:opacity75Item];
    [menuItems addObject:opacity100Item];
    
    
    CGRect bounds = self.menuAnnotation.bounds;
    bounds = CGRectInset(bounds, -15, -15);
    CGRect rect = [self convertRect:bounds fromPage:self.menuAnnotation.page];
    [self becomeFirstResponder];
    [UIMenuController sharedMenuController].menuItems = menuItems;
    [[UIMenuController sharedMenuController] setTargetRect:rect inView:self];
    [[UIMenuController sharedMenuController] setMenuVisible:YES animated:YES];
}

- (void)opacity25ItemAction:(id)sender {
    self.menuAnnotation.opacity = 0.25;
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self showMenuForAnnotation:self.menuAnnotation];
}

- (void)opacity50ItemAction:(id)sender {
    self.menuAnnotation.opacity = 0.50;
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self showMenuForAnnotation:self.menuAnnotation];
}

- (void)opacity75ItemAction:(id)sender {
    self.menuAnnotation.opacity = 0.75;
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self showMenuForAnnotation:self.menuAnnotation];
}

- (void)opacity100ItemAction:(id)sender {
    self.menuAnnotation.opacity = 1.0;
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self showMenuForAnnotation:self.menuAnnotation];
}

- (void)copyItemAction:(id)sender {
    if ([self.menuAnnotation isKindOfClass:[CPDFMarkupAnnotation class]]) {
        NSString *string = [(CPDFMarkupAnnotation *)self.menuAnnotation markupText];
        [[UIPasteboard generalPasteboard] setString:string];
    } else if ([self.menuAnnotation isKindOfClass:[CPDFStampAnnotation class]]) {
        UIImage *image = [(CPDFStampAnnotation *)self.menuAnnotation stampImage];
        [UIPasteboard generalPasteboard].image = image;
    } else if ([self.menuAnnotation isKindOfClass:[CPDFFreeTextAnnotation class]]) {
        NSString *string = self.menuAnnotation.contents;
        [[UIPasteboard generalPasteboard] setString:string];
    }
}

- (void)noteItemAction:(id)sender {
    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformOpenNote:forAnnotation:)]) {
        [self.performDelegate PDFViewPerformOpenNote:self forAnnotation:self.menuAnnotation];
    }
}

- (void)deleteItemAction:(id)sender {
    self.activeAnnotation = nil;
    [self.menuAnnotation.page removeAnnotation:self.menuAnnotation];
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self updateScrollEnabled];
}

- (void)shareItemAction:(id)sender {
    if ([self.menuAnnotation isKindOfClass:[CPDFMarkupAnnotation class]]) {
        if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformShare:forAnnotation:)]) {
            [self.performDelegate PDFViewPerformShare:self forAnnotation:(CPDFMarkupAnnotation *)self.menuAnnotation];
        }
    }
}

- (void)saveItemAction:(id)sender {
    if ([self.menuAnnotation isKindOfClass:[CPDFStampAnnotation class]]) {
        if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformSave:forAnnotation:)]) {
            [self.performDelegate PDFViewPerformSave:self forAnnotation:(CPDFStampAnnotation *)self.menuAnnotation];
        }
    }
}

- (void)editItemAction:(id)sender {
    if ([self.menuAnnotation isKindOfClass:[CPDFLinkAnnotation class]]) {
        if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformEditLink:forAnnotation:)]) {
            [self.performDelegate PDFViewPerformEditLink:self forAnnotation:(CPDFLinkAnnotation *)self.menuAnnotation];
        }
    } else if ([self.menuAnnotation isKindOfClass:[CPDFFreeTextAnnotation class]]) {
        self.activeAnnotation = nil;
        [self editAnnotationFreeText:(CPDFFreeTextAnnotation *)self.menuAnnotation];
    }
}

- (void)addHereItemAction:(id)sender {
    if ([self.menuAnnotation isKindOfClass:[CPDFSignatureAnnotation class]]) {
        [(CPDFSignatureAnnotation *)self.menuAnnotation signature];
        
        self.activeAnnotation = nil;
        [self setNeedsDisplayForPage:self.menuAnnotation.page];
        [self updateScrollEnabled];
    }
}

- (void)thicknessItemAction:(id)sender {
    NSMutableArray *menuItems = [NSMutableArray array];
    UIMenuItem *thickness0_5Item = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"0.5pt", nil)
                                                               action:@selector(thickness0_5ItemAction:)] autorelease];
    UIMenuItem *thickness1Item = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"1pt", nil)
                                                             action:@selector(thickness1ItemAction:)] autorelease];
    UIMenuItem *thickness1_5Item = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"1.5pt", nil)
                                                               action:@selector(thickness1_5ItemAction:)] autorelease];
    UIMenuItem *thickness2Item = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"2pt", nil)
                                                                action:@selector(thickness2ItemAction:)] autorelease];
    UIMenuItem *thickness3Item = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"3pt", nil)
                                                                action:@selector(thickness3ItemAction:)] autorelease];
    UIMenuItem *thickness5Item = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"5pt", nil)
                                                                action:@selector(thickness5ItemAction:)] autorelease];
    UIMenuItem *thickness9Item = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"9pt", nil)
                                                                action:@selector(thickness9ItemAction:)] autorelease];
    [menuItems addObject:thickness0_5Item];
    [menuItems addObject:thickness1Item];
    [menuItems addObject:thickness1_5Item];
    [menuItems addObject:thickness2Item];
    [menuItems addObject:thickness3Item];
    [menuItems addObject:thickness5Item];
    [menuItems addObject:thickness9Item];
    
    CGRect bounds = self.menuAnnotation.bounds;
    bounds = CGRectInset(bounds, -15, -15);
    CGRect rect = [self convertRect:bounds fromPage:self.menuAnnotation.page];
    [self becomeFirstResponder];
    [UIMenuController sharedMenuController].menuItems = menuItems;
    [[UIMenuController sharedMenuController] setTargetRect:rect inView:self];
    [[UIMenuController sharedMenuController] setMenuVisible:YES animated:YES];
}

- (void)thickness0_5ItemAction:(id)sender {
    self.menuAnnotation.borderWidth = 0.5;
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self showMenuForAnnotation:self.menuAnnotation];
}

- (void)thickness1ItemAction:(id)sender {
    self.menuAnnotation.borderWidth = 1.0;
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self showMenuForAnnotation:self.menuAnnotation];
}

- (void)thickness1_5ItemAction:(id)sender {
    self.menuAnnotation.borderWidth = 1.5;
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self showMenuForAnnotation:self.menuAnnotation];
}

- (void)thickness2ItemAction:(id)sender {
    self.menuAnnotation.borderWidth = 2.0;
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self showMenuForAnnotation:self.menuAnnotation];
}

- (void)thickness3ItemAction:(id)sender {
    self.menuAnnotation.borderWidth = 3.0;
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self showMenuForAnnotation:self.menuAnnotation];
}

- (void)thickness5ItemAction:(id)sender {
    self.menuAnnotation.borderWidth = 5.0;
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self showMenuForAnnotation:self.menuAnnotation];
}

- (void)thickness9ItemAction:(id)sender {
    self.menuAnnotation.borderWidth = 9.0;
    [self setNeedsDisplayForPage:self.menuAnnotation.page];
    [self showMenuForAnnotation:self.menuAnnotation];
}

#pragma mark - Menu

- (NSArray<UIMenuItem *> *)menuItemsAtPoint:(CGPoint)point forPage:(CPDFPage *)page {
    if (PDFViewAnnotationModeNone != self.annotationMode) {
        return nil;
    }
    NSArray *items = [super menuItemsAtPoint:point forPage:page];
    self.menuPoint = point;
    self.menuPage = page;
    
    NSMutableArray *menuItems = [NSMutableArray arrayWithArray:items];
    if (self.currentSelection) {
        UIMenuItem *textNoteItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Note", nil)
                                                               action:@selector(textNoteItemAction:)] autorelease];
        UIMenuItem *textShareItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Share", nil)
                                                                action:@selector(textShareItemAction:)] autorelease];
        UIMenuItem *defineItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Define", nil)
                                                             action:@selector(defineItemAction:)] autorelease];
        UIMenuItem *linkItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Link", nil)
                                                           action:@selector(linkItemAction:)] autorelease];
        UIMenuItem *searchItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Search", nil)
                                                             action:@selector(searchItemAction:)] autorelease];
        [menuItems insertObject:textNoteItem atIndex:0];
        [menuItems addObject:textShareItem];
        [menuItems addObject:defineItem];
        [menuItems addObject:linkItem];
        [menuItems addObject:searchItem];
    } else {
        UIMenuItem *textNoteItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Note", nil)
                                                               action:@selector(textNoteItemAction:)] autorelease];
        UIMenuItem *textItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Text", nil)
                                                           action:@selector(textItemAction:)] autorelease];
        UIMenuItem *signatureItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Signature", nil)
                                                                action:@selector(signatureItemAction:)] autorelease];
        UIMenuItem *stampItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Stamp", nil)
                                                            action:@selector(stampItemAction:)] autorelease];
        UIMenuItem *imageItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Image", nil)
                                                            action:@selector(imageItemAction:)] autorelease];
        UIMenuItem *pasteItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Paste", nil)
                                                            action:@selector(pasteItemAction:)] autorelease];
        [menuItems addObject:textNoteItem];
        [menuItems addObject:textItem];
        [menuItems addObject:signatureItem];
        [menuItems addObject:stampItem];
        [menuItems addObject:imageItem];
        if ([self isPasteboardValid]) {
            [menuItems addObject:pasteItem];
        }
    }
    return menuItems;
}

- (BOOL)isPasteboardValid {
    NSString *textType = (NSString *)kUTTypeText;
    NSString *urlType  = (NSString*)kUTTypeURL;
    NSString *urlFileType  = (NSString*)kUTTypeFileURL;
    NSString *jpegImageType = (NSString *)kUTTypeJPEG;
    NSString *pngImageType = (NSString *)kUTTypePNG;
    NSString *rawImageType = @"com.apple.uikit.image";
    return [[UIPasteboard generalPasteboard] containsPasteboardTypes:[NSArray arrayWithObjects:textType, urlType, urlFileType, jpegImageType, pngImageType, rawImageType, nil]];
}

- (void)textNoteItemAction:(id)sender {
    if (self.currentSelection) {
        NSMutableArray *quadrilateralPoints = [NSMutableArray array];
        CPDFMarkupAnnotation *annotation = [[[CPDFMarkupAnnotation alloc] initWithDocument:self.document markupType:CPDFMarkupTypeHighlight] autorelease];
        for (CPDFSelection *selection in self.currentSelection.selectionsByLine) {
            CGRect bounds = selection.bounds;
            [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMaxY(bounds))]];
            [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMaxY(bounds))]];
            [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMinY(bounds))]];
            [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMinY(bounds))]];
        }
        [annotation setQuadrilateralPoints:quadrilateralPoints];
        [annotation setMarkupText:self.currentSelection.string];
        [annotation setModificationDate:[NSDate date]];
        [annotation setUserName:[self annotationUserName]];
        [self.currentSelection.page addAnnotation:annotation];
        [annotation createPopup];
        
        [self clearSelection];
        [self setNeedsDisplayForPage:annotation.page];
        
        if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformPopup:forAnnotation:)]) {
            [self.performDelegate PDFViewPerformPopup:self forAnnotation:annotation];
        }
    } else {
        [self addAnnotation:PDFViewAnnotationModeNote atPoint:self.menuPoint forPage:self.menuPage];
    }
}

- (void)textShareItemAction:(id)sender {
    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformShare:forSelection:)]) {
        [self.performDelegate PDFViewPerformShare:self forSelection:self.currentSelection];
    }
}

- (void)defineItemAction:(id)sender {
    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformDefine:forSelection:)]) {
        [self.performDelegate PDFViewPerformDefine:self forSelection:self.currentSelection];
    }
}

- (void)linkItemAction:(id)sender {
    if (self.currentSelection) {
        CPDFLinkAnnotation *annotation = [[[CPDFLinkAnnotation alloc] initWithDocument:self.document] autorelease];
        annotation.bounds = self.currentSelection.bounds;
        [annotation setModificationDate:[NSDate date]];
        [annotation setUserName:[self annotationUserName]];
        [self.currentSelection.page addAnnotation:annotation];
        
        [self clearSelection];
        [self setNeedsDisplayForPage:annotation.page];
        
        if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformEditLink:forAnnotation:)]) {
            [self.performDelegate PDFViewPerformEditLink:self forAnnotation:annotation];
        }
    }
}

- (void)searchItemAction:(id)sender {
    NSMutableArray *menuItems = [NSMutableArray array];
    UIMenuItem *googleSearchItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Google", nil)
                                                               action:@selector(googleSearchItemAction:)] autorelease];
    UIMenuItem *wikiSearchItem = [[[UIMenuItem alloc] initWithTitle:NSLocalizedString(@"Wiki", nil)
                                                             action:@selector(wikiSearchItemAction:)] autorelease];
    [menuItems addObject:googleSearchItem];
    [menuItems addObject:wikiSearchItem];
    
    CGRect rect = [self convertRect:self.currentSelection.bounds fromPage:self.currentSelection.page];
    [self becomeFirstResponder];
    [UIMenuController sharedMenuController].menuItems = menuItems;
    [[UIMenuController sharedMenuController] setTargetRect:rect inView:self];
    [[UIMenuController sharedMenuController] setMenuVisible:YES animated:YES];
}

- (void)googleSearchItemAction:(id)sender {
    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformGoogleSearch:forSelection:)]) {
        [self.performDelegate PDFViewPerformGoogleSearch:self forSelection:self.currentSelection];
    }
}

- (void)wikiSearchItemAction:(id)sender {
    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformWikiSearch:forSelection:)]) {
        [self.performDelegate PDFViewPerformWikiSearch:self forSelection:self.currentSelection];
    }
}

- (void)textItemAction:(id)sender {
    [self addAnnotationFreeTextAtPoint:self.menuPoint forPage:self.menuPage];
}

- (void)signatureItemAction:(id)sender {
    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformAddSignture:atPoint:forPage:)]) {
        [self.performDelegate PDFViewPerformAddSignture:self atPoint:self.menuPoint forPage:self.menuPage];
    }
}

- (void)stampItemAction:(id)sender {
    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformAddStamp:atPoint:forPage:)]) {
        [self.performDelegate PDFViewPerformAddStamp:self atPoint:self.menuPoint forPage:self.menuPage];
    }
}

- (void)imageItemAction:(id)sender {
    if ([self.performDelegate respondsToSelector:@selector(PDFViewPerformAddImage:atPoint:forPage:)]) {
        [self.performDelegate PDFViewPerformAddImage:self atPoint:self.menuPoint forPage:self.menuPage];
    }
}

- (void)pasteItemAction:(id)sender {
    NSString *textType = (NSString *)kUTTypeText;
    NSString *utf8TextType = (NSString *)kUTTypeUTF8PlainText;
    NSString *urlType  = (NSString*)kUTTypeURL;
    NSString *urlFileType  = (NSString*)kUTTypeFileURL;
    NSString *jpegImageType = (NSString *)kUTTypeJPEG;
    NSString *pngImageType = (NSString *)kUTTypePNG;
    NSString *rawImageType = @"com.apple.uikit.image";
    
    NSArray *pasteArray = [UIPasteboard generalPasteboard].items;
    for (NSDictionary* dic in pasteArray) {
        if ([dic objectForKey:textType] ||
            [dic objectForKey:utf8TextType] ||
            [dic objectForKey:urlType] ||
            [dic objectForKey:urlFileType]) {
            NSString *contents = nil;
            if ([dic objectForKey:textType] ||
                [dic objectForKey:utf8TextType]) {
                contents = [UIPasteboard generalPasteboard].string;
            } else {
                contents = [[UIPasteboard generalPasteboard].URL absoluteString];
            }
            UIFont *font = [UIFont systemFontOfSize:12.0];
            NSDictionary *attributes = @{NSFontAttributeName : font};
            CGRect bounds = [contents boundingRectWithSize:CGSizeMake(280, MAXFLOAT)
                                                   options:(NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading)
                                                attributes:attributes
                                                   context:nil];
            
            CPDFFreeTextAnnotation *annotation = [[[CPDFFreeTextAnnotation alloc] initWithDocument:self.document] autorelease];
            [annotation setContents:contents];
            [annotation setModificationDate:[NSDate date]];
            [annotation setUserName:[self annotationUserName]];
            annotation.bounds = CGRectMake(self.menuPoint.x-bounds.size.width/2.0,
                                           self.menuPoint.y-bounds.size.height/2.0,
                                           bounds.size.width, bounds.size.height);
            [self.menuPage addAnnotation:annotation];
            [self setNeedsDisplayForPage:self.menuPage];
        } else if ([dic objectForKey:jpegImageType] ||
                   [dic objectForKey:pngImageType] ||
                   [dic objectForKey:rawImageType]) {
            UIImage *image = [UIPasteboard generalPasteboard].image;
            UIImage *compressImage = [self compressImage:image size:CGSizeMake(240.0, 240.0)];
            
            CPDFStampAnnotation *annotation = [[[CPDFStampAnnotation alloc] initWithDocument:self.document image:compressImage] autorelease];
            [annotation setModificationDate:[NSDate date]];
            [annotation setUserName:[self annotationUserName]];
            annotation.bounds = CGRectMake(self.menuPoint.x-compressImage.size.width/2.0,
                                           self.menuPoint.y-compressImage.size.height/2.0,
                                           compressImage.size.width, compressImage.size.height);
            [self.menuPage addAnnotation:annotation];
            [self setNeedsDisplayForPage:self.menuPage];
        }
    }
}

@end