PDF_Office/PDF Office/PDF Master/Class/PDFWindowController/PDFListView/CPDFListView.m

//
//  CPDFListView.m
//  ComPDFKit
//
//  Copyright © 2014-2022 PDF Technologies, Inc. All Rights Reserved.
//
//  THIS SOURCE CODE AND ANY ACCOMPANYING DOCUMENTATION ARE PROTECTED BY INTERNATIONAL COPYRIGHT LAW
//  AND MAY NOT BE RESOLD OR REDISTRIBUTED. USAGE IS BOUND TO THE ComPDFKit LICENSE AGREEMENT.
//  UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS SUBJECT TO CIVIL AND CRIMINAL PENALTIES.
//  This notice may not be removed from this file.
//

#import "CPDFListView.h"

#import "CPDFAnnotationModel.h"
#import "CSelfSignAnnotation.h"
#import "CSelfSignAnnotationFreeText.h"

#import "CPDFListView+Private.h"
#import "CPDFListView+Event.h"
#import "CPDFListView+Tool.h"
#import "CPDFListView+Extension.h"
#import "CPDFListView+UndoManager.h"
#import "NSImage+PDFListView.h"
#import "NSCursor+PDFListView.h"

#import "CPDFListView+Extension.h"
#import <PDF_Master-Swift.h>

NSNotificationName const CPDFListViewSelectionChangedNotification = @"CPDFListViewSelectionChangedNotification";

NSNotificationName const CPDFListViewToolModeChangeNotification = @"CPDFListViewToolModeChangeNotification";

NSNotificationName const CPDFListViewAnnotationTypeChangeNotification = @"CPDFListViewAnnotationTypeChangeNotification";

NSNotificationName const CPDFListViewMagnificationChangedNotification = @"CPDFListViewMagnificationChangedNotification";

NSNotificationName const CPDFListViewDidAddAnnotationNotification = @"CPDFListViewDidAddAnnotationNotification";

NSNotificationName const CPDFListViewDidRemoveAnnotationNotification = @"CPDFListViewDidRemoveAnnotationNotification";

NSNotificationName const CPDFListViewActiveAnnotationsChangeNotification = @"CPDFListViewActiveAnnotationsChangeNotification";

NSNotificationName const CPDFListViewAnnotationsAttributeHasChangeNotification = @"CPDFListViewAnnotationsAttributeHasChangeNotification";

@implementation CPDFListView

#pragma mark - Init

- (id)init {
    self = [super init];
    if (self) {
        [self commonInitialization];
    }
    return self;
}

- (id)initWithFrame:(NSRect)frameRect {
    self = [super initWithFrame:frameRect];
    if (self) {
        [self commonInitialization];
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)decoder {
    self = [super initWithCoder:decoder];
    if (self) {
        [self commonInitialization];
    }
    return self;
}

- (void)updateLayer {
    [super updateLayer];
    if (@available(macOS 10.14, *)) {
        if ([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewBackgroundColor)]) {
            NSColor *color = [self.pdfListViewDelegate PDFListViewBackgroundColor];
            self.backgroundColor = color;
        }
    }
}

- (void)commonInitialization {
    self.selectionPageIndex = NSNotFound;
    self.clickLineAnnotation = nil;
    self.isClickDoubleCreatLine = NO;
    
    self.activeAnnotations = [NSMutableArray array];
    self.selectAnnotations = [NSMutableArray array];
    self.dragHoverPoints = [NSMutableArray array];
    self.aCopyAnnotations = [NSMutableArray array];
    
    [self registerAsObserver];
    
    [self addTrackingArea];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handlePageChangedNotification:)
                                                 name:CPDFViewPageChangedNotification object:self];

}

- (void)addTrackingArea {
    NSTrackingArea *trackingArea = [[NSTrackingArea alloc] initWithRect:self.bounds options:NSTrackingMouseEnteredAndExited | NSTrackingInVisibleRect | NSTrackingActiveInKeyWindow | NSTrackingMouseMoved owner:self userInfo:nil];
    [self addTrackingArea:trackingArea];
}

- (void)goToPageIndex:(NSInteger)pageIndex animated:(BOOL)animated {
    if (self.currentPageIndex != pageIndex) {
        [self recordForwardBackWithPageIndex:self.currentPageIndex];
    }
   
    [super goToPageIndex:pageIndex animated:animated];
}

- (void)goToSelection:(CPDFSelection *)selection animated:(BOOL)animated {
    if (self.currentPageIndex != selection.page.pageIndex) {
        [self recordForwardBackWithPageIndex:self.currentPageIndex];
    }
    
    [super goToSelection:selection animated:animated];
}

- (void)goToDestination:(CPDFDestination *)destination {
    [super goToDestination:destination];
}

- (void)goToRect:(CGRect)rect onPage:(CPDFPage *)page animated:(BOOL)animated {
    if (self.currentPageIndex != page.pageIndex) {
        [self recordForwardBackWithPageIndex:self.currentPageIndex];
    }
    
    [super goToRect:rect onPage:page animated:animated];
}

- (void)goToTargetPoint:(NSPoint)point onPage:(CPDFPage *)page atScrollPosition:(CScrollPosition)scrollPosition {
    if (self.currentPageIndex != page.pageIndex) {
        [self recordForwardBackWithPageIndex:self.currentPageIndex];
    }
    
    [super goToTargetPoint:point onPage:page atScrollPosition:scrollPosition];
}

#pragma mark - Setter & Get

- (void)setDocument:(CPDFDocument *)document {
    @synchronized (self) {
        self.selectionRect = NSZeroRect;
        self.selectionPageIndex = NSNotFound;
    }
//    self.toolMode = CFormToolMode;
//    self.annotationType = CAnnotationTypeRadioButton;

//    CStampSignatureObject *objc = [[CStampSignatureObject alloc] initImageStampWithFilePath:[[NSBundle mainBundle] pathForResource:@"Quick Start Guide" ofType:@"pdf"]];
//    [self setAddStampObject:objc keepToolModel:YES];
//
    [super setDocument:document];
    
    [self.window makeFirstResponder:self];
    
}

-(void)setToolMode:(CToolMode)newToolMode {
    if(newToolMode != _toolMode) {
        BOOL isDisplayAnnotationView = NO;
        
        if(self.isSetLinkDestinationArea)
            self.isSetLinkDestinationArea = NO;
        
        if ((CTextToolMode == _toolMode || CNoteToolMode == _toolMode) && CTextToolMode != newToolMode) {
            if (newToolMode != CNoteToolMode && self.activeAnnotation) {
                if([self.activeAnnotation isKindOfClass:[CPDFFreeTextAnnotation class]]) {
                    CPDFFreeTextAnnotation *freeTextAn = (CPDFFreeTextAnnotation *)self.activeAnnotation;
                    if ([self isEditWithCurrentFreeText:freeTextAn]) {
                        [self commitEditAnnotationFreeText:freeTextAn];
                    }
                }

                [self updateActiveAnnotations:@[]];
            }
            if ([self currentSelection])
                [self setCurrentSelection:nil];
        } else if (_toolMode == CSelectToolMode && NSEqualRects(self.selectionRect, NSZeroRect) == NO) {
            self.selectionRect = NSZeroRect;
            self.selectionPageIndex = NSNotFound;
            dispatch_async(dispatch_get_main_queue(), ^{
                [[NSNotificationCenter defaultCenter] postNotificationName:CPDFViewSelectionChangedNotification object:self];
            });
            if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewChangedSelectionOrMagnification:)])
                [self.pdfListViewDelegate PDFListViewChangedSelectionOrMagnification:self];
            
            isDisplayAnnotationView = YES;
        }
        
        BOOL highlightFormFiled = [[NSUserDefaults standardUserDefaults] boolForKey:@"kPDFViewHighlightFormFiledKey"];

        if (CFormToolMode == _toolMode && !highlightFormFiled) {
            [[CPDFKitConfig sharedInstance] setEnableFormFieldHighlight:highlightFormFiled];
            isDisplayAnnotationView = YES;
        } else if (CFormToolMode == newToolMode && !highlightFormFiled) {
            [[CPDFKitConfig sharedInstance] setEnableFormFieldHighlight:YES];
            isDisplayAnnotationView = YES;
        }
        
        if(CEditPDFToolMode == newToolMode)
            [self beginEditingLoadType:CEditingLoadTypeText|CEditingLoadTypeImage];
        
        if(_toolMode == CEditPDFToolMode) {
            if(self.isEdited) {
                [self commitEditing];
            }
            [self endOfEditing];
        }
            
        _toolMode = newToolMode;
        
        self.selectZoomToolModeZoomOut = NO;

        if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewChangedToolMode:forToolMode:)])
            [self.pdfListViewDelegate PDFListViewChangedToolMode:self forToolMode:newToolMode];
        
        dispatch_async(dispatch_get_main_queue(), ^{
            [[NSNotificationCenter defaultCenter] postNotificationName:CPDFListViewToolModeChangeNotification object:self];
        });
        [self resetPDFViewAnnotation];
        
        if(isDisplayAnnotationView)
            [self setNeedsDisplayAnnotationViewForVisiblePages];
    }
}

-(void)setShowHopnumber:(BOOL)showHopnumber {
    _showHopnumber = showHopnumber;
    [self setNeedsDisplayAnnotationViewForVisiblePages];
}

- (void)setAnnotationType:(CAnnotationType)annotationType {
    if (_annotationType != annotationType) {
        if(CAnnotationTypeLink == annotationType || CAnnotationTypeLink == _annotationType)
            [self setNeedsDisplayAnnotationViewForVisiblePages];

        _annotationType = annotationType;
        
        if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewChangedAnnotationType:forAnnotationType:)])
            [self.pdfListViewDelegate PDFListViewChangedAnnotationType:self forAnnotationType:annotationType];
        
        dispatch_async(dispatch_get_main_queue(), ^{
            [[NSNotificationCenter defaultCenter] postNotificationName:CPDFListViewAnnotationTypeChangeNotification object:self];
        });
    }
    if(self.activeAnnotations.count > 0) {
        if([self.activeAnnotation isKindOfClass:[CPDFFreeTextAnnotation class]]) {
            CPDFFreeTextAnnotation *freeTextAn = (CPDFFreeTextAnnotation *)self.activeAnnotation;
            if ([self isEditWithCurrentFreeText:freeTextAn]) {
                [self commitEditAnnotationFreeText:freeTextAn];
            }
        }
        [self updateActiveAnnotations:@[]];
        [self setNeedsDisplayAnnotationViewForVisiblePages];
    }
    
    if(self.isSetLinkDestinationArea)
        self.isSetLinkDestinationArea = NO;

    [self resetPDFViewAnnotation];
}

- (NSRect)currentSelectionRect {
    if (CSelectToolMode == self.toolMode)
        return self.selectionRect;
    return NSZeroRect;
}

- (CPDFAnnotation *)activeAnnotation {
    return self.activeAnnotations.lastObject;
}

- (void)setHideNotes:(BOOL)hideNotes {
    _hideNotes = hideNotes;
    
    for(NSInteger i = 0;i<self.document.pageCount;i++) {
        CPDFPage *page = [self.document pageAtIndex:i];
        for (CPDFAnnotation *annotation in page.annotations) {
            [annotation setAnnotationShouldDisplay:!self.hideNotes];
            [annotation setHidden: self.hideNotes];
        }
    }
    [self setNeedsDisplayAnnotationViewForVisiblePages];
}

-(void)setIsSetLinkDestinationArea:(BOOL)isSetLinkDestinationArea {
    _isSetLinkDestinationArea = isSetLinkDestinationArea;
    if (_isSetLinkDestinationArea) {
        if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewLinkDestinationStart:withActiveAnnotation:)]) {
            [self.pdfListViewDelegate PDFListViewLinkDestinationStart:self withActiveAnnotation:self.activeAnnotation];
        }
    } else {
        if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewLinkDestinationEnd:withActiveAnnotation:)]) {
            [self.pdfListViewDelegate PDFListViewLinkDestinationEnd:self withActiveAnnotation:self.activeAnnotation];
        }
    }
}

#pragma mark - menu add image
- (void)addImageAnnotation:(NSImage *)image center:(NSPoint)center isRemoveBGColor:(BOOL)isRemoveBGColor{
    [self setToolMode:CTextToolMode]; //不支持重复添加，重置状态
    if (isRemoveBGColor) {
        NSData *imageData = [image TIFFRepresentation];
        CGImageRef imageRef;
        if (imageData) {
            CGImageSourceRef imageSource = CGImageSourceCreateWithData((CFDataRef)imageData, NULL);
            imageRef = CGImageSourceCreateImageAtIndex(imageSource, 0, NULL);
        } else {
            return NSBeep();
        }
        
        const int imageWidth = image.size.width;
        const int imageHeight = image.size.height;
        size_t bytesPerRow = imageWidth * 4;
        uint32_t* rgbImageBuf = (uint32_t*)malloc(bytesPerRow * imageHeight);
        
        CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
        CGContextRef context = CGBitmapContextCreate(rgbImageBuf,
                                                     imageWidth,
                                                     imageHeight,
                                                     8,
                                                     bytesPerRow,
                                                     colorSpace,
                                                     kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipLast);
        CGContextDrawImage(context, CGRectMake(0, 0, imageWidth, imageHeight), imageRef);
        
        int pixelNum = imageWidth * imageHeight;
        uint32_t* pCurPtr = rgbImageBuf;
        for (int i = 0; i < pixelNum; i++, pCurPtr++) {
            uint8_t* ptr = (uint8_t*)pCurPtr;
            if (ptr[1] > 240 && ptr[2] > 240 && ptr[3] > 240) {
                ptr[0] = 0;
            }
        }
        
        CGDataProviderRef dataProvider = CGDataProviderCreateWithData(NULL, rgbImageBuf, bytesPerRow * imageHeight, nil);
        imageRef = CGImageCreate(imageWidth,
                                 imageHeight,
                                 8,
                                 32,
                                 bytesPerRow,
                                 colorSpace,
                                 kCGImageAlphaLast |kCGBitmapByteOrder32Little,
                                 dataProvider,
                                 NULL,
                                 true,
                                 kCGRenderingIntentDefault);
        CGDataProviderRelease(dataProvider);
        
        NSImage *newImage = nil;
        if (imageRef) {
            NSRect imageRect = NSMakeRect(0.0, 0.0, 0.0, 0.0);
            CGContextRef imageContext = nil;
            
            // Get the image dimensions.
            imageRect.size.height = CGImageGetHeight(imageRef);
            imageRect.size.width = CGImageGetWidth(imageRef);
            
            // Create a new image to receive the Quartz image data.
            newImage = [[NSImage alloc] initWithSize:imageRect.size];
            [newImage lockFocus];
            
            // Get the Quartz context and draw.
            imageContext = (CGContextRef)[[NSGraphicsContext currentContext] CGContext];
            CGContextDrawImage(imageContext, *(CGRect*)&imageRect, imageRef);
            [newImage unlockFocus];
            CGImageRelease(imageRef);
        }
        
        if (newImage) {
            [self addAnnotationWithImage:newImage center:center];
        } else {
            [self addAnnotationWithImage:image center:center];
        }
    } else {
        [self addAnnotationWithImage:image center:center];
    }
}

- (void)addAnnotationWithImage:(NSImage *)image center:(NSPoint)center {
    CPDFPage *page = nil;
    NSRect bounds = NSZeroRect;
    CPDFSelection *selection = [self currentSelection];
    page = [selection safeFirstPage];
    
    // if the mouse was in the toolbar and there is a page below the toolbar, we get a point outside of the visible rect
    page = NSMouseInRect(center, [self visibleContentRect], [self isFlipped]) ? [self pageForPoint:center nearest:NO] : nil;
    
    if (page == nil) {
        // Get center of the PDFView.
//        NSRect viewFrame = [self frame];
//        center = [self KMCpdfCenterPoint:viewFrame];//KMCpdfCenterPoint(viewFrame);
        page = [self pageForPoint: center nearest: YES];
        if (page == nil) {
            // Get center of the current page
            page = [self currentPage];
            NSPoint point = [self KMCpdfCenterPoint:[page boundsForBox:[self displayBox]]];
            center = [self convertPoint:point fromPage:page];
        }
    }
    CGFloat defaultWidth = 360;
    CGFloat defaultHeight = 90;
    CGFloat scaleS = MIN(defaultWidth/image.size.width, defaultHeight/image.size.height);
    NSSize defaultSize = CGSizeMake(image.size.width * scaleS, image.size.height * scaleS);
    
    // Convert to "page space".
//    center = [self KMCpdfIntegralPoint:[self convertPoint:center toPage:page]];
//    bounds = [self KMCpdfRectFromCenterAndSize:center size:defaultSize];
    
    // Make sure it fits in the page
//    bounds = [self KMCpdfConstrainRect:bounds boundary:[page boundsForBox:[self displayBox]]];
    
    if (page != nil) {
        BOOL isInitial = NSEqualSizes(bounds.size, NSZeroSize) && selection == nil;
        NSRect pageBounds = [page boundsForBox:CPDFDisplayMediaBox];
        
        // new note added by note tool mode, don't add actual zero sized notes
        if (isInitial)
            bounds = [self KMCRectFromCenterAndSquareSizeWith:bounds.origin size:8.0];
        
        
        if(!CGPointEqualToPoint(self.lastAddAnnotationPoint, CGPointZero)) {
            bounds.origin.x = self.lastAddAnnotationPoint.x + 3.0;
            bounds.origin.y = self.lastAddAnnotationPoint.y - 3.0;
            CGFloat pageWidth = pageBounds.size.width;
            
            if (bounds.origin.x + bounds.size.width >pageWidth) {
                bounds.origin.x = pageWidth - bounds.size.width;
            }
            if (bounds.origin.y - bounds.size.height < 0) {
                bounds.origin.y = bounds.size.height;
            }
        }
        self.lastAddAnnotationPoint = bounds.origin;
        
        CPDFStampAnnotation *newAnnotation = [[CPDFStampAnnotation alloc]initWithDocument:self.document image:image];
        newAnnotation.bounds = CGRectMake(center.x, center.y, defaultSize.width, defaultSize.height);
        [newAnnotation registerUserName];
        [self addAnnotation:newAnnotation toPage:page];
        [[self undoManager] setActionName:NSLocalizedString(@"Add Note", @"Undo action name")];
        
        [self.activeAnnotations removeAllObjects];
        [self.activeAnnotations addObject:newAnnotation];
    }
    else NSBeep();
}

- (NSRect)KMCRectFromCenterAndSquareSizeWith: (NSPoint)center size:(CGFloat)size{
    NSRect rect = NSZeroRect;
    rect.origin.x = center.x - 0.5 * size;
    rect.origin.y = center.y - 0.5 * size;
    rect.size.width = size;
    rect.size.height = size;
    return rect;
}

- (NSRect)KMCpdfRectFromCenterAndSize: (NSPoint)center size: (NSSize)size{
    NSRect rect = NSZeroRect;
    rect.origin.x = center.x - 0.5 * size.width;
    rect.origin.y = center.y - 0.5 * size.height;
    rect.size = size;
    return rect;
}

- (NSPoint)KMCpdfCenterPoint:(NSRect)rect{
    return NSMakePoint(NSMidX(rect), NSMidY(rect));
}
- (NSPoint)KMCpdfIntegralPoint:(NSPoint)point{
    return NSMakePoint(round(point.x), round(point.y));
}

- (NSRect)KMCpdfConstrainRect:(NSRect)rect boundary: (NSRect)boundary{
    NSRect newRect = rect;
    if (NSWidth(rect) > NSWidth(boundary)){
        newRect.size.width = NSWidth(boundary);
    }
    if (NSHeight(rect) > NSHeight(boundary)){
        newRect.size.height = NSHeight(boundary);
    }
    if (NSMinX(rect) < NSMinX(boundary)){
        newRect.origin.x = NSMinX(boundary);
    }else if (NSMaxX(rect) > NSMaxX(boundary)){
        newRect.origin.x = NSMaxX(boundary) - NSWidth(rect);
    }
    if (NSMinY(rect) < NSMinY(boundary)){
        newRect.origin.y = NSMinY(boundary);
    }else if (NSMaxY(rect) > NSMaxY(boundary)){
        newRect.origin.y = NSMaxY(boundary) - NSHeight(rect);
    }
    return newRect;
}

#pragma mark - Public

- (CPDFAnnotation *)addAnnotationWithType:(CAnnotationType)annotationType selection:(CPDFSelection *)selection page:(CPDFPage *)page bounds:(NSRect)bounds {
    CPDFAnnotation *annotation = nil;
    
    NSString *text = [selection PDFListViewCleanedString];
    
    if([CPDFListView isMarkupAnnotationType:annotationType]) {
        if(selection){
            annotation = [self addPDFSelection:selection annotationTyoe:annotationType];
            [annotation setContents:text?:@""];
        } else NSBeep();
    } else {
        BOOL isInitial = NO;
        if(selection) {
            CGRect noteRect = selection.bounds;
            isInitial = NSEqualSizes(noteRect.size, NSZeroSize);
        } else {
            isInitial = NSEqualSizes(bounds.size, NSZeroSize);
        }
        CPDFAnnotationModel *annotationModel = [[CPDFAnnotationModel alloc]initWithAnnotationType:annotationType];
        CGSize size = CGSizeMake(annotationModel.noteWidth, annotationModel.noteHeight);

        if(annotationType == CAnnotationTypeAnchored)
            bounds = CGRectMake(bounds.origin.x, bounds.origin.y, size.width, size.height);
        if (annotationType == CAnnotationTypeCircle || annotationType == CAnnotationTypeSquare || annotationType == CAnnotationTypeLine || annotationType == CAnnotationTypeArrow || annotationType == CAnnotationTypeAnchored) {
            bounds = KMConstrainRect(bounds, [page boundsForBox:[self displayBox]]);
        }
        
        if (isInitial)
            bounds = annotationType == CAnnotationTypeAnchored ? CPDFListViewRectFromCenterAndSize(bounds.origin, size) : CPDFListViewRectFromCenterAndSquareSize(bounds.origin, MIN_NOTE_SIZE);
        switch (annotationType) {
            case CAnnotationTypeFreeText:
                annotation = [[CPDFFreeTextAnnotation alloc]initWithPDFListViewNoteWith:self.document];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeAnchored:
                annotation = [[CPDFTextAnnotation alloc]initWithPDFListViewNoteWith:self.document];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeCircle:
                annotation = [[CPDFCircleAnnotation alloc]initWithPDFListViewNoteWith:self.document];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeSquare:
                annotation = [[CPDFSquareAnnotation alloc]initWithPDFListViewNoteWith:self.document];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeLine:
                annotation = [[CPDFLineAnnotation alloc]initWithPDFListViewNoteWith:self.document annotationType:CAnnotationTypeLine];
                [(CPDFLineAnnotation *)annotation setObservedStartPoint:CGPointMake(bounds.origin.x, bounds.origin.y)];
                [(CPDFLineAnnotation *)annotation setObservedEndPoint:CGPointMake(bounds.origin.x + bounds.size.width,bounds.origin.y+ bounds.size.height)];
                [(CPDFLineAnnotation *)annotation setStartLineStyle:CPDFLineStyleNone];
                [(CPDFLineAnnotation *)annotation setEndLineStyle:CPDFLineStyleNone];
                break;
            case CAnnotationTypeArrow: {
                annotation = [[CPDFLineAnnotation alloc]initWithPDFListViewNoteWith:self.document annotationType:CAnnotationTypeArrow];
                [(CPDFLineAnnotation *)annotation setObservedStartPoint:CGPointMake(bounds.origin.x, bounds.origin.y)];
                [(CPDFLineAnnotation *)annotation setObservedEndPoint:CGPointMake(bounds.origin.x + bounds.size.width,bounds.origin.y+ bounds.size.height)];
            }
                break;
            case CAnnotationTypeLink:
                annotation = [[CPDFLinkAnnotation alloc] initWithPDFListViewNoteWith:self.document];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeTextField:
                annotation = [[CPDFTextWidgetAnnotation alloc] initWithPDFListViewNoteWith:self.document];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeCheckBox:
                annotation = [[CPDFButtonWidgetAnnotation alloc] initWithPDFListViewNoteWith:self.document controlType:CPDFWidgetCheckBoxControl];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeRadioButton:
                annotation = [[CPDFButtonWidgetAnnotation alloc] initWithPDFListViewNoteWith:self.document controlType:CPDFWidgetRadioButtonControl];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeListMenu:
                annotation = [[CPDFChoiceWidgetAnnotation alloc] initWithPDFListViewNoteWith:self.document listChoice:YES];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeComboBox:
                annotation = [[CPDFChoiceWidgetAnnotation alloc] initWithPDFListViewNoteWith:self.document listChoice:NO];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeSignature:
                annotation = [[CPDFSignatureWidgetAnnotation alloc] initWithPDFListViewNoteWith:self.document];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeActionButton:
                annotation = [[CPDFButtonWidgetAnnotation alloc] initWithPDFListViewNoteWith:self.document controlType:CPDFWidgetPushButtonControl];
                annotation.bounds = bounds;
                break;
            case CAnnotationTypeSignFalse:
            case CAnnotationTypeSignTure:
            case CAnnotationTypeSignCircle:
            case CAnnotationTypeSignLine:
            case CAnnotationTypeSignDot:
                annotation = [[CSelfSignAnnotation alloc]initPDFListViewNoteWithDocument:self.document type:self.annotationType];
                annotation.bounds = bounds;
                [(CSelfSignAnnotation *)annotation updateAppearanceStream];
                break;
            case CAnnotationTypeSignText:
            case CAnnotationTypeSignConfig:
            case CAnnotationTypeSignDate:
                annotation = [[CSelfSignAnnotationFreeText alloc]initPDFListViewNoteWithDocument:self.document subType:self.annotationType string:@"" bounds:bounds];
                break;
            case CAnnotationTypeRedact:
                annotation = [self addRedactPDFSelection:selection];
                break;
            default:
                break;
        }
    }
    
    if (annotation) {
        if (annotationType != CAnnotationTypeLine && annotationType != CAnnotationTypeArrow && annotationType != CAnnotationTypeInk && [text length] > 0)
            [annotation setString:text];

        
        [self addAnnotation:annotation toPage:page];
    }
        
    return annotation;
}

- (void)drawAnnotation:(CPDFAnnotation *)annotation toContext:(CGContextRef)context {
    [super drawAnnotation:annotation toContext:context];
    
    if ([self.pdfListViewDelegate respondsToSelector:@selector(PDFListView:needDrawAnnotation:)]) {
        if ([self.pdfListViewDelegate PDFListView:self needDrawAnnotation:annotation] == false) {
            return;
        }
    }
    
    if (CFormToolMode == _toolMode &&
        [annotation isKindOfClass:[CPDFWidgetAnnotation class]] && self.showFormFieldName && !annotation.isHidden) {
        
        CPDFWidgetAnnotation *annotationWidget = (CPDFWidgetAnnotation*)annotation;
        NSString *fieldName = annotationWidget.fieldName;
        if(self.showHopnumber) {
           NSInteger hopNumen = annotationWidget.widgetHopNumber;
            if(fieldName) {
                fieldName = [NSString stringWithFormat:@"%ld %@",hopNumen,fieldName];
            } else {
                fieldName = [NSString stringWithFormat:@"%ld",hopNumen];
            }
            
        }
        if (fieldName.length > 0) {
            CGContextSaveGState(context);
            NSMutableParagraphStyle *paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
            paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;
            paragraphStyle.alignment = NSTextAlignmentLeft;
            NSColor *backgroundColor = [NSColor blackColor];
            if ([self.activeAnnotations containsObject:annotation]) {
                backgroundColor = [NSColor colorWithRed:82.0/255.0 green:102.0/255.0 blue:204.0/255.0  alpha:1.0];
            }
            
            if([CPDFKitConfig sharedInstance].isShowFormRequiredFlagColor)
                backgroundColor = [CPDFKitConfig sharedInstance].formRequiredFlagColor?:[NSColor redColor];
            
            NSDictionary *attributes = @{NSFontAttributeName : [NSFont systemFontOfSize:12],
                                         NSForegroundColorAttributeName : [NSColor whiteColor],
                                         NSBackgroundColorAttributeName : backgroundColor,
                                         NSParagraphStyleAttributeName : paragraphStyle};
            NSString* drawString = fieldName;
            drawString = [drawString getMaxStringWithBounds:annotationWidget.bounds attributes:attributes];
            
            CGSize size = [drawString sizeWithAttributes:attributes];
            CGRect drawRect = annotationWidget.bounds;
            drawRect.origin.y += (drawRect.size.height - size.height)/2.0;
            drawRect.origin.x += (drawRect.size.width - size.width)/2.0;
            drawRect.size.height = size.height;
            drawRect.size.width = size.width;
            
            [NSGraphicsContext saveGraphicsState];
            [NSGraphicsContext setCurrentContext:[NSGraphicsContext graphicsContextWithGraphicsPort:context flipped:NO]];
            [drawString drawInRect:drawRect withAttributes:attributes];
            [NSGraphicsContext restoreGraphicsState];
            CGContextRestoreGState(context);
            
            NSRect rect = [self integralRect:[annotationWidget bounds] onPage:[annotationWidget page]];
            CGFloat lineWidth = [self unitWidthOnPage:[annotationWidget page]];
            CGContextSaveGState(context);
            CGColorRef color = [NSColor blackColor].CGColor;
            CGContextSetStrokeColorWithColor(context, color);
            CGContextStrokeRectWithWidth(context, CGRectInset(NSRectToCGRect(rect), 0,0), lineWidth);
        }
    } else if(CNoteToolMode== _toolMode && _annotationType == CAnnotationTypeLink && [annotation isKindOfClass:[CPDFLinkAnnotation class]]) {
        CGContextSaveGState(context);
        NSMutableParagraphStyle *paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
        paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;
        paragraphStyle.alignment = NSTextAlignmentLeft;
        NSColor *backgroundColor = [NSColor clearColor];
        
        NSDictionary *attributes = @{NSFontAttributeName : [NSFont systemFontOfSize:12],
                                     NSForegroundColorAttributeName : [NSColor whiteColor],
                                     NSBackgroundColorAttributeName : backgroundColor,
                                     NSParagraphStyleAttributeName : paragraphStyle};
        
        NSString *drawString = NSLocalizedString(@"No Destination", nil);
        CPDFDestination *destination = [(CPDFLinkAnnotation *)annotation destination];
        if(destination) {
            CPDFPage *page = destination.page;
            NSString * url = [(CPDFLinkAnnotation *)annotation URL];
            
            if(destination.page) {
                NSUInteger index = [self.document indexForPage:page] + 1;
                drawString = [NSString stringWithFormat:@"%@ %@",NSLocalizedString(@"to Page",nil),@(index)];
            } else if(url.length > 0) {
                drawString = url;
            }
        }
        drawString = [drawString getMaxStringWithBounds:annotation.bounds attributes:attributes];
        
        CGSize size = [drawString sizeWithAttributes:attributes];
        CGRect drawRect = annotation.bounds;
        drawRect.origin.y += (drawRect.size.height - size.height)/2.0;
        drawRect.origin.x += (drawRect.size.width - size.width)/2.0;
        drawRect.size.height = size.height;
        drawRect.size.width = size.width;
        
        CGContextSaveGState(context);
        CGContextSetFillColorWithColor(context, [NSColor colorWithRed:23.0/255.0 green:112.0/255.0 blue:244.0/255.0 alpha:0.5].CGColor);
        CGContextFillRect(context,annotation.bounds);
        CGContextRestoreGState(context);
        
        [NSGraphicsContext saveGraphicsState];
        CGRect frameRect=CGRectMake(annotation.bounds.origin.x, annotation.bounds.origin.y + (annotation.bounds.size.height - 20)/2, annotation.bounds.size.width, 20);
        float fontSize = 9;
        NSColor *textColor = [NSColor whiteColor];
        CTTextAlignment alignMent = kCTTextAlignmentCenter;
        CFStringRef stringRef = (__bridge CFStringRef)drawString;
        NSMutableAttributedString* attString = [[NSMutableAttributedString alloc] initWithString:drawString];
        NSInteger _stringLength=[drawString length];
        CTTextAlignment theAlignment = alignMent;
        CTParagraphStyleSetting theSettings[1] =
        {
            { kCTParagraphStyleSpecifierAlignment, sizeof(CTTextAlignment),&theAlignment
            }
            
        };
        
        CTParagraphStyleRef paragraphStyleRef = CTParagraphStyleCreate(theSettings, 1);

        [attString addAttribute:(id)kCTParagraphStyleAttributeName value:(id)paragraphStyleRef range:NSMakeRange(0, _stringLength)];
        [attString addAttribute:(id)kCTForegroundColorAttributeName value:(id)textColor.CGColor range:NSMakeRange(0, _stringLength)];
        [attString addAttribute:(id)kCTFontNameAttribute value:@"Courier" range:NSMakeRange(0, _stringLength)];

        CFAttributedStringRef attrString =(__bridge CFAttributedStringRef) attString;
        CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(attrString);
        CGMutablePathRef framePath = CGPathCreateMutable();
        CGPathAddRect(framePath, NULL, frameRect);
        CFRange currentRange = CFRangeMake(0, 0);
        CTFrameRef frameRef = CTFramesetterCreateFrame(framesetter, currentRange, framePath, NULL);
        CGPathRelease(framePath);
        CTFrameDraw(frameRef, context);
        CFRelease(frameRef);
        CFRelease(framesetter);
        [NSGraphicsContext restoreGraphicsState];
        CGContextRestoreGState(context);        
    }
}

- (void)setAddStampObject:(CStampSignatureObject *)stampObject keepToolModel:(BOOL)isToolModel {
    if (CAnnotationTypeStamp == self.annotationType ||
        CAnnotationTypeSignSignature == self.annotationType) {
        self.stampObject = stampObject;
        self.isStampModel = isToolModel;
        [NSCursor clearStampCursor];
    }
}

- (void)addAnnotationWithImage:(NSImage *)image page:(CPDFPage *)page point:(NSPoint)point {
    NSRect bounds = NSZeroRect;
    CPDFSelection *selection = [self currentSelection];
    
    CGFloat defaultWidth = 360;
    CGFloat defaultHeight = 90;
    NSSize defaultSize = ([page rotation] % 180 == 0) ? NSMakeSize(defaultWidth, defaultHeight) : NSMakeSize(defaultHeight, defaultWidth);

    bounds = CPDFListViewRectFromCenterAndSize(point, defaultSize);
    
    // Make sure it fits in the page
    bounds = CPDFListViewConstrainRect(bounds, [page boundsForBox:[self displayBox]],[CPDFListViewConfig defaultManager].annotationBorderOffset.floatValue);
//    bounds = CPDFListViewConstrainRect(bounds, [page boundsForBox:[self displayBox]]);

    if (page != nil) {
        BOOL isInitial = NSEqualSizes(bounds.size, NSZeroSize) && selection == nil;

        // new note added by note tool mode, don't add actual zero sized notes
        if (isInitial)
            bounds = CPDFListViewRectFromCenterAndSquareSize(bounds.origin, 8.0);
        
        CGFloat borderDefaultWidth = image.size.width;
        CGFloat borderScale = borderDefaultWidth/image.size.height;

         if (bounds.size.width/bounds.size.height > borderScale) {
             bounds.size.height = bounds.size.height;
             bounds.size.width  = bounds.size.height*borderScale;
         } else {
             bounds.size.width  = bounds.size.width;
             bounds.size.height = bounds.size.width/borderScale;
         }
        
        CPDFListStampAnnotation *newAnnotation = [[CPDFListStampAnnotation alloc] initWithDocument:self.document image:image];
        newAnnotation.bounds = bounds;
        [newAnnotation setBorderBoundsWithImage:image];

        [self addAnnotation:newAnnotation toPage:page];
        [[self undoManager] setActionName:NSLocalizedString(@"Add Note", @"Undo action name")];
        
        [self updateActiveAnnotations:@[newAnnotation]];
        [self setNeedsDisplayAnnotation:newAnnotation];
    }
    else NSBeep();
}

- (void)updateIsRightActiveAnnotations:(NSArray<CPDFAnnotation *> *)activeAnnotations {
    [self refreshActiveAnnotations:activeAnnotations isRight:YES];
}

- (void)updateActiveAnnotations:(NSArray<CPDFAnnotation *> *)activeAnnotations {
    [self refreshActiveAnnotations:activeAnnotations isRight:NO];
}

-(void)refreshActiveAnnotations:(NSArray<CPDFAnnotation *> *)activeAnnotations isRight:(BOOL)isRight {
//    for (CPDFAnnotation *annotation in self.activeAnnotations) {
//        if([annotation isKindOfClass:[CPDFLinkAnnotation class]]) {
//            CPDFLinkAnnotation *linkAnnotation = (CPDFLinkAnnotation *)annotation;
//            if((linkAnnotation.destination || linkAnnotation.URL.length > 0)) {
//            } else {
//                [self removeAnnotation:linkAnnotation];
//            }
//        }
//    }
    
    if(activeAnnotations) {
        NSArray *selectTure = [activeAnnotations filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"SELF in %@", self.activeAnnotations]];
        
        BOOL isSame = NO;
        if(self.activeAnnotations.count == activeAnnotations.count && self.activeAnnotations.count == selectTure.count) isSame = YES;
        
        if(!isSame) {
            self.activeAnnotations = [NSMutableArray arrayWithArray:activeAnnotations];
            
            if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewChangeatioActiveAnnotations:forActiveAnnotations:isRightMenu:)])
                [self.pdfListViewDelegate PDFListViewChangeatioActiveAnnotations:self forActiveAnnotations:self.activeAnnotations isRightMenu:isRight];
            
            dispatch_async(dispatch_get_main_queue(), ^{
                [[NSNotificationCenter defaultCenter] postNotificationName:CPDFListViewActiveAnnotationsChangeNotification object:self];
            });
        }
    } else if (!activeAnnotations && self.activeAnnotations.count > 0) {
        [self.activeAnnotations removeAllObjects];
        if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewChangeatioActiveAnnotations:forActiveAnnotations:isRightMenu:)])
            [self.pdfListViewDelegate PDFListViewChangeatioActiveAnnotations:self forActiveAnnotations:self.activeAnnotations isRightMenu:isRight];
        
        dispatch_async(dispatch_get_main_queue(), ^{
            [[NSNotificationCenter defaultCenter] postNotificationName:CPDFListViewActiveAnnotationsChangeNotification object:self];
        });
    }
}

- (void)addActiveAnnotations:(NSArray<CPDFAnnotation *> *)activeAnnotations {
    BOOL isContains = YES;
    for (CPDFAnnotation *annotation in activeAnnotations) {
        if(![self.activeAnnotations containsObject:annotation]) {
            [self.activeAnnotations addObject:annotation];
            isContains = NO;
        }
    }
    
    if(!isContains) {
        if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewChangeatioActiveAnnotations:forActiveAnnotations:isRightMenu:)])
            [self.pdfListViewDelegate PDFListViewChangeatioActiveAnnotations:self forActiveAnnotations:self.activeAnnotations isRightMenu:NO];
        
        dispatch_async(dispatch_get_main_queue(), ^{
            [[NSNotificationCenter defaultCenter] postNotificationName:CPDFListViewActiveAnnotationsChangeNotification object:self];
        });
    }
}

- (void)removeActiveAnnotations:(NSArray<CPDFAnnotation *> *)removeAnnotations {
    BOOL isContains = NO;
    NSMutableArray *tarr = [NSMutableArray arrayWithArray:self.activeAnnotations];
    [tarr removeObjectsInArray:removeAnnotations];
    self.activeAnnotations = tarr;
    isContains = YES;

    if(isContains) {
        if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewChangeatioActiveAnnotations:forActiveAnnotations:isRightMenu:)])
            [self.pdfListViewDelegate PDFListViewChangeatioActiveAnnotations:self forActiveAnnotations:self.activeAnnotations isRightMenu:NO];
        
        dispatch_async(dispatch_get_main_queue(), ^{
            [[NSNotificationCenter defaultCenter] postNotificationName:CPDFListViewActiveAnnotationsChangeNotification object:self];
        });
    }
}

- (void)editAnnotation:(CPDFAnnotation *)annotation {
    if ([annotation isKindOfClass:[CPDFFreeTextAnnotation class]]) {
        [self editAnnotationFreeText:(CPDFFreeTextAnnotation *)annotation];
        [[self window] makeFirstResponder:self];
        
        [self setNeedsDisplayAnnotation:annotation];
    } else {
        if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewEditAnnotation:forAnnotation:)]) {
            [self.pdfListViewDelegate PDFListViewEditAnnotation:self forAnnotation:annotation];
        } else {
            [CPDFListView cancelPreviousPerformRequestsWithTarget:self selector:@selector(showHUDHint:) object:self.hoverAnnotation];

            if (!self.popOver) {
                _popOver = [[NSPopover alloc] init];
            }
            
            if([annotation isKindOfClass:[CPDFTextAnnotation class]]) {
                __block typeof(self) blockSelf = self;
                _popOver.delegate = self;
                CPDFListEditAnnotationViewController *vc = [[CPDFListEditAnnotationViewController alloc] initWithNibName:@"CPDFListEditAnnotationViewController" bundle:[NSBundle mainBundle] annotation:annotation];
                vc.pdflistView = self;
                _popOver.contentViewController = vc;
                vc.closeCallBack = ^{
                    [blockSelf.popOver close];
                };

                NSBox *box = (NSBox *)vc.view;
                NSView *popoverView = [[[self.popOver contentViewController] view] superview];
                [popoverView setWantsLayer:YES];
                
                vc.changeColorCallBack = ^{
                    NSColor *borColor = annotation.color?:[NSColor whiteColor];
                    [[popoverView layer] setBackgroundColor:borColor.CGColor];
                    [blockSelf setNeedsDisplayAnnotationViewForPage:annotation.page];
                };
                NSColor *borColor = annotation.color?:[NSColor whiteColor];
                [[popoverView layer] setBackgroundColor:borColor.CGColor];
                _popOver.animates = YES;
                _popOver.behavior = NSPopoverBehaviorTransient;
                [_popOver showRelativeToRect:[self convertRect:annotation.bounds fromPage:annotation.page] ofView:self preferredEdge:NSMaxXEdge];
            } else if(![annotation isKindOfClass:[CPDFLinkAnnotation class]]){
                CPDFListAnnotationNoteWindowController *wc = [CPDFListAnnotationNoteWindowController sharedInstance];
                CGRect rect = wc.window.frame;
                CGRect anBounds = [self convertRect:annotation.bounds fromPage:annotation.page];
                
                anBounds = [self convertRectToScreen:anBounds];
                rect.origin.x = anBounds.origin.x;
                rect.origin.y = anBounds.origin.y;
                if (@available(macOS 10.13, *))
                    [wc.window makeKeyAndOrderFront:nil];
                else
                    [wc showWindow:nil];
                [wc updateAnnotation:annotation];
                [wc.window setFrame:rect display:YES animate:NO];
                wc.window.title = @"";
            }
            
        }
    }
}

- (void)rotateStampAnnotation:(CPDFListStampAnnotation *)annotation rotateAngle:(NSInteger)angle {
    if([annotation isKindOfClass:[CPDFListStampAnnotation class]]) {
        CPDFListStampAnnotation *stampAnnotation = (CPDFListStampAnnotation *)annotation;
        NSInteger rotation = stampAnnotation.rotation;
        rotation = rotation - angle;
        
        if (rotation < 0) {
            rotation += 360;
        } else if (rotation >= 360) {
            rotation-=360;
        }

        [annotation setRotation:rotation];
         rotation = [annotation appearanceStreamRotation];

        
        [self setNeedsDisplayAnnotationViewForPage:annotation.page];
        
        [[[self undoManager] prepareWithInvocationTarget:self] rotateStampAnnotation:annotation rotateAngle:-angle];
    }
}

- (void)rotateSignatureAnnotation:(CPDFListSignatureAnnotation *)annotation rotateAngle:(NSInteger)angle {
    if([annotation isKindOfClass:[CPDFListSignatureAnnotation class]]) {
        CPDFListSignatureAnnotation *signatureAnnotation = (CPDFListSignatureAnnotation *)annotation;
        NSInteger rotation = signatureAnnotation.rotation;
        rotation = rotation - angle;
        
        if (rotation < 0) {
            rotation += 360;
        } else if (rotation >= 360) {
            rotation-=360;
        }

        [signatureAnnotation setRotation:rotation];
         rotation = [signatureAnnotation appearanceStreamRotation];

        
        [self setNeedsDisplayAnnotationViewForPage:annotation.page];
        
        [[[self undoManager] prepareWithInvocationTarget:self] rotateSignatureAnnotation:annotation rotateAngle:-angle];
    }
}

- (void)addAnnotationWithAnnotation:(CPDFAnnotation *)annotation toPage:(CPDFPage *)page {
    [self addAnnotation:annotation toPage:page];
}
- (void)addAnnotation:(CPDFAnnotation *)annotation toPage:(CPDFPage *)page {
    [[[self undoManager] prepareWithInvocationTarget:self] removeAnnotation:annotation];
    
    [annotation setModificationDate:[NSDate date]];
    //widget设置作者与fieldName冲突
    if (![annotation isKindOfClass:[CPDFWidgetAnnotation class]]) {
        [annotation setUserName:CPDFKitShareConfig.annotationAuthor?:NSFullUserName()];
    }
    [page addAnnotation:annotation];
    [self setNeedsDisplayAnnotation:annotation];
    [[self undoManager] setActionName:NSLocalizedString(@"Add Note", @"Undo action name")];
        
    dispatch_async(dispatch_get_main_queue(), ^{
        [[NSNotificationCenter defaultCenter] postNotificationName:CPDFListViewDidAddAnnotationNotification object:self userInfo:[NSDictionary dictionaryWithObjectsAndKeys:page, CPDFListViewPageKey, annotation, CPDFListViewAnnotationKey, nil]];
    });
    
    
    if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewAddAnnotations:forAddAnnotations:inPage:)])
        [self.pdfListViewDelegate PDFListViewAddAnnotations:self forAddAnnotations:@[annotation] inPage:page];
}

- (void)removeAnnotation:(CPDFAnnotation *)annotation {
    if ([annotation isKindOfClass:[CPDFTextAnnotation class]] && self.popOver.isShown) {
//        if (annotation.contents.length <= 0) {
            CPDFAnnotation *wasAnnotation = annotation;
            CPDFPage *page = wasAnnotation.page;
            
            [[[self undoManager] prepareWithInvocationTarget:self] addAnnotation:wasAnnotation toPage:page];
            
            [page removeAnnotation:wasAnnotation];
            [self annotationsChangedOnPage:page];
            [self setNeedsDisplayAnnotation:wasAnnotation];

            dispatch_async(dispatch_get_main_queue(), ^{
                [[NSNotificationCenter defaultCenter] postNotificationName:CPDFListViewDidRemoveAnnotationNotification object:self
                                                                  userInfo:[NSDictionary dictionaryWithObjectsAndKeys:wasAnnotation, CPDFListViewAnnotationKey, page, CPDFListViewPageKey, nil]];
            });
            
            if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewRemoveAnnotations:forRemoveAnnotations:inPage:)])
                [self.pdfListViewDelegate PDFListViewRemoveAnnotations:self forRemoveAnnotations:@[annotation] inPage:page];
//        }
    } else {
        CPDFAnnotation *wasAnnotation = annotation;
        CPDFPage *page = wasAnnotation.page;
        
        [[[self undoManager] prepareWithInvocationTarget:self] addAnnotation:wasAnnotation toPage:page];
        
        [page removeAnnotation:wasAnnotation];
        [self annotationsChangedOnPage:page];
        [self setNeedsDisplayAnnotation:wasAnnotation];

        dispatch_async(dispatch_get_main_queue(), ^{
            [[NSNotificationCenter defaultCenter] postNotificationName:CPDFListViewDidRemoveAnnotationNotification object:self
                                                              userInfo:[NSDictionary dictionaryWithObjectsAndKeys:wasAnnotation, CPDFListViewAnnotationKey, page, CPDFListViewPageKey, nil]];
        });
        
        if([self.pdfListViewDelegate respondsToSelector:@selector(PDFListViewRemoveAnnotations:forRemoveAnnotations:inPage:)])
            [self.pdfListViewDelegate PDFListViewRemoveAnnotations:self forRemoveAnnotations:@[annotation] inPage:page];
    }
}

- (void)drawPage:(CPDFPage *)pdfPage toContext:(CGContextRef)context {
    
    [super drawPage:pdfPage toContext:context];
    
    [self drawSelectionForPage:pdfPage inContext:context];
    
    BOOL isIncludText = NO;
    NSMutableArray *currentActiveAnnotations = [NSMutableArray array];
    NSMutableArray *currentPageAnnotations = [NSMutableArray array];

    for (CPDFAnnotation *an in self.activeAnnotations) {
        if([an.page isEqual:pdfPage]) {
            if([an isKindOfClass:[CPDFFreeTextAnnotation class]])
                isIncludText = YES;
            
            //多选注释框去除mark注释与便签注释
            if(!([an isKindOfClass:[CPDFMarkupAnnotation class]] || [an isKindOfClass:[CPDFTextAnnotation class]])) {
                [currentActiveAnnotations addObject:an];
            }
            
            [currentPageAnnotations addObject:an];
        }
    }
    
    if(currentActiveAnnotations.count > 1) {
        NSRect rect = [self selectionMultipleBoundsWithAnnotations:currentActiveAnnotations];
        
        CGFloat lineWidth = [self unitWidthOnPage:pdfPage];
        CGContextSaveGState(context);
        CGColorRef color = [CPDFListViewConfig defaultManager].annotationBorderColor.CGColor;
        CGContextSetStrokeColorWithColor(context, color);
        CGContextStrokeRectWithWidth(context, CGRectInset(NSRectToCGRect(rect), 0,0), lineWidth);
        CGContextRestoreGState(context);
        CGContextSaveGState(context);
        if(isIncludText) {
            [CPDFListView DrawFreeTextResizeHandle:context rect:rect radius: 4.0 * lineWidth active:true];
        } else {
            [CPDFListView DrawResizeHandles:context rect:rect radius:4.0 * lineWidth active:true];
        }
        CGContextRestoreGState(context);
    }
    
    if(self.multiplAnnotationObject &&
       !CGRectIsEmpty(self.multiplAnnotationObject.drawRect) &&
       self.multiplAnnotationObject.page == pdfPage) {
        CGRect selectAnnotationBounds = self.multiplAnnotationObject.drawRect;
        
        NSRect rect = selectAnnotationBounds;

        CGFloat lineWidth = [self unitWidthOnPage:pdfPage];
        CGContextSaveGState(context);
        CGColorRef color = [CPDFListViewConfig defaultManager].annotationBorderColor.CGColor;
        CGContextSetStrokeColorWithColor(context, color);
        CGContextStrokeRectWithWidth(context, CGRectInset(NSRectToCGRect(rect), 0,0), lineWidth);
        CGContextRestoreGState(context);
    }
    
    [currentPageAnnotations enumerateObjectsUsingBlock:^(CPDFAnnotation *annotation, NSUInteger idx, BOOL * _Nonnull stop) {
        if (annotation.page && [annotation.page isEqual:pdfPage]) {
            [annotation drawSelectionHighlightForView:self inContext:context isHover:NO];
        }
    }];
    
    [self.selectAnnotations enumerateObjectsUsingBlock:^(CPDFAnnotation *annotation, NSUInteger idx, BOOL * _Nonnull stop) {
        if (annotation.page && [annotation.page isEqual:pdfPage]) {
            [annotation drawSelectionHighlightForView:self inContext:context isHover:NO];
        }
    }];
    
    if (self.hoverAnnotation.page && [self.hoverAnnotation.page isEqual:pdfPage] && ![self.activeAnnotations containsObject:self.hoverAnnotation]) {
        [self.hoverAnnotation drawSelectionHighlightForView:self inContext:context isHover:YES];
    }
    
    if(!CGRectEqualToRect(self.multiplSelectBounds, CGRectZero) && [self.multiplSelectPage isEqual:pdfPage]) {
        @synchronized (self) {
            CGContextSetLineCap(context, kCGLineCapRound);
            CGContextSetLineWidth(context, 1.0);
            CGContextSetStrokeColorWithColor(context, [CPDFListViewConfig defaultManager].annotationBorderColor.CGColor);
            CGContextBeginPath(context);
            CGContextMoveToPoint(context, self.multiplSelectBounds.origin.x, self.multiplSelectBounds.origin.y);
            CGContextAddLineToPoint(context, self.multiplSelectBounds.origin.x+ self.multiplSelectBounds.size.width,self.multiplSelectBounds.origin.y);
            CGContextAddLineToPoint(context, self.multiplSelectBounds.origin.x + self.multiplSelectBounds.size.width,self.multiplSelectBounds.origin.y + + self.multiplSelectBounds.size.height);
            CGContextAddLineToPoint(context, self.multiplSelectBounds.origin.x,self.multiplSelectBounds.origin.y + + self.multiplSelectBounds.size.height);
            CGContextClosePath(context);
            CGFloat lengths[] = {5,5};
            CGContextSetLineDash(context, 0, lengths,2);
            CGContextStrokePath(context);
        }
    }
    
}

- (void)drawSelectionForPage:(CPDFPage *)pdfPage inContext:(CGContextRef)context {
    NSRect rect;
    NSUInteger pageIndex;
    @synchronized (self) {
        pageIndex = self.selectionPageIndex;
        rect = self.selectionRect;
    }
    if (pageIndex != NSNotFound) {
        BOOL isWidget = NO;
        for (CPDFAnnotation * annotation in self.activeAnnotations) {
            if ([annotation isForm]) {
                isWidget = YES;
                break;
            }
        }
        
        if (isWidget &&
            _toolMode != CFormToolMode) {
            return;
        }
        
        NSRect bounds = [pdfPage boundsForBox:[self displayBox]];
        CGFloat radius = HANDLE_SIZE * [self unitWidthOnPage:pdfPage];
        CGColorRef color = CGColorCreateGenericGray(0.0, 0.6);
        CGContextSetFillColorWithColor(context, color);
        CGColorRelease(color);
        CGContextBeginPath(context);
        CGContextAddRect(context, NSRectToCGRect(bounds));
        CGContextAddRect(context, NSRectToCGRect(rect));
        CGContextEOFillPath(context);
        if ([pdfPage pageIndex] != pageIndex) {
            color = CGColorCreateGenericGray(0.0, 0.3);
            CGContextSetFillColorWithColor(context, color);
            CGColorRelease(color);
            CGContextFillRect(context, NSRectToCGRect(rect));
        }
        [CPDFListView DrawResizeHandles:context rect:rect radius:radius active:true];
    }
}

- (void)removeShapeLayer {
    if (![self.shapeLayerTopH isEqual:nil] && ![self.shapeLayerBottomH isEqual:nil] && ![self.shapeLayerLeftV isEqual:nil] && ![self.shapeLayerRightV isEqual:nil]) {
        [self.shapeLayerTopH removeFromSuperlayer];
        [self.shapeLayerBottomH removeFromSuperlayer];
        [self.shapeLayerLeftV removeFromSuperlayer];
        [self.shapeLayerRightV removeFromSuperlayer];
        self.shapeLayerTopH = nil;
        self.shapeLayerBottomH = nil;
        self.shapeLayerLeftV = nil;
        self.shapeLayerRightV = nil;
    }
}

- (BOOL)consistentTypeWithAnnotation:(CPDFAnnotation *)annotation {
    if (self.annotationType == CAnnotationTypeSignSignature) {
        if (![annotation isKindOfClass:[CPDFSignatureAnnotation class]])
            return NO;
    } else if (self.annotationType == CAnnotationTypeStamp) {
        if (![annotation isKindOfClass:[CPDFStampAnnotation class]])
            return NO;
    } else if (self.annotationType == CAnnotationTypeAnchored) {
        if (![annotation isKindOfClass:[CPDFTextAnnotation class]])
            return NO;
    } else if (self.annotationType == CAnnotationTypeLink) {
        if (![annotation isKindOfClass:[CPDFLinkAnnotation class]])
            return NO;
    } else if (self.annotationType == CAnnotationTypeFreeText) {
        if (![annotation isKindOfClass:[CPDFFreeTextAnnotation class]])
            return NO;
    } else if (self.annotationType == CAnnotationTypeLine || self.annotationType == CAnnotationTypeArrow || self.annotationType == CAnnotationTypeSquare || self.annotationType == CAnnotationTypeCircle) {
        if (![annotation isKindOfClass:[CPDFLineAnnotation class]] && ![annotation isKindOfClass:[CPDFSquareAnnotation class]] && ![annotation isKindOfClass:[CPDFCircleAnnotation class]])
            return NO;
    } else if (self.annotationType == CAnnotationTypeHighlight || self.annotationType == CAnnotationTypeUnderline || self.annotationType == CAnnotationTypeStrikeOut) {
        if (![annotation isKindOfClass:[CPDFMarkupAnnotation class]])
            return NO;
    } else if (self.annotationType == CAnnotationTypeInk) {
        if (![annotation isKindOfClass:[CPDFInkAnnotation class]])
            return NO;
    } else if (self.annotationType == CAnnotationTypeRadioButton) {
        
    } else if (self.annotationType == CAnnotationTypeCheckBox) {
        
    } else if (self.annotationType == CAnnotationTypeTextField) {
        
    } else if (self.annotationType == CAnnotationTypeComboBox) {
        
    } else if (self.annotationType == CAnnotationTypeListMenu) {
        
    } else if (self.annotationType == CAnnotationTypeActionButton) {
        
    } else if (self.annotationType == CAnnotationTypeSignature) {
        
    } else if (self.annotationType == CAnnotationTypeSignText) {
        
    } else if (self.annotationType == CAnnotationTypeSignFalse) {
        
    } else if (self.annotationType == CAnnotationTypeSignTure) {
        
    } else if (self.annotationType == CAnnotationTypeSignCircle) {
        
    } else if (self.annotationType == CAnnotationTypeSignLine) {
        
    } else if (self.annotationType == CAnnotationTypeSignDot) {
        
    } else if (self.annotationType == CAnnotationTypeSignConfig) {
        
    } else if (self.annotationType == CAnnotationTypeSignDate) {
        
    }
    return YES;
}

#pragma mark Zooming

- (void)zoomToRect:(NSRect)rect onPage:(CPDFPage *)page {
    if (NSIsEmptyRect(rect) == NO) {
        BOOL isLegacy = [NSScroller respondsToSelector:@selector(preferredScrollerStyle)] == NO || [NSScroller preferredScrollerStyle] == NSScrollerStyleLegacy;
        NSRect bounds = [self bounds];
        CGFloat scale = 1.0;
        if (isLegacy) {
            bounds.size.width -= [NSScroller scrollerWidth];
            bounds.size.height -= [NSScroller scrollerWidth];
        }
        if (NSWidth(bounds) * NSHeight(rect) > NSWidth(rect) * NSHeight(bounds))
            scale = NSHeight(bounds) / NSHeight(rect);
        else
            scale = NSWidth(bounds) / NSWidth(rect);
        [self setScaleFactor:scale];
        NSScrollView *scrollView = [self scrollView];
        if (isLegacy && ([scrollView hasHorizontalScroller] == NO || [scrollView hasVerticalScroller] == NO)) {
            if ([scrollView hasVerticalScroller])
                bounds.size.width -= [NSScroller scrollerWidth];
            if ([scrollView hasHorizontalScroller])
                bounds.size.height -= [NSScroller scrollerWidth];
            if (NSWidth(bounds) * NSHeight(rect) > NSWidth(rect) * NSHeight(bounds))
                scale = NSHeight(bounds) / NSHeight(rect);
            else
                scale = NSWidth(bounds) / NSWidth(rect);
            [self setScaleFactor:scale];
        }
        [self goToRect:rect onPage:page];
        
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            CGPoint tPagePoint = CGPointMake(rect.origin.x, rect.origin.y+rect.size.height);
            [self goToTargetPoint:tPagePoint onPage:page atScrollPosition:CScrollPositionTop];
        });
    }
}

#pragma mark - NSPopoverDelegate

- (void)popoverWillClose:(NSNotification *)notification {
    NSPopover *popover = notification.object;
    
    if([popover.contentViewController isKindOfClass:[CPDFListEditAnnotationViewController class]]) {
        CPDFListEditAnnotationViewController *listEditAnnotationViewController = (CPDFListEditAnnotationViewController *)popover.contentViewController;
        CPDFAnnotation *annotation = listEditAnnotationViewController.annotation;
        NSString *contensString = listEditAnnotationViewController.contentString;
        if([annotation isKindOfClass:[CPDFTextAnnotation class]]) {
            if(contensString && contensString.length > 0) {
                annotation.contents = listEditAnnotationViewController.contentString;
                [self setNeedsDisplayAnnotation:annotation];
            } else {
                if([self.activeAnnotations containsObject:annotation]) {
                    [self.activeAnnotations removeObject:annotation];
                }
                [self removeAnnotation:annotation];
            }
        } else {
            annotation.contents = listEditAnnotationViewController.contentString;
            [self setNeedsDisplayAnnotation:annotation];
        }

    }
    self.popOver = nil;
}

- (void)handlePageChangedNotification:(NSNotification *)notification {
    self.copyCount = 0;
}

#pragma mark - Form Alignment

- (KMPDFViewActiveFormsType)formAnnotionsType:(NSArray *)annotationArray {
    
    NSSet *set = [NSSet setWithArray:[annotationArray valueForKey:@"type"]];
    NSArray *array = [set allObjects];
    
    if (array.count > 1 || ![array.firstObject isEqualToString:@"Widget"]) {
        return KMPDFViewActiveFormsType_NotAllform;
    }
    
    PDFAnnotation *referenceAnnotation = annotationArray.firstObject;
    Class referenceAnnotationClass = [referenceAnnotation class];
    if ([referenceAnnotationClass isEqual:[CPDFButtonWidgetAnnotation class]]) {
        referenceAnnotationClass = [CPDFButtonWidgetAnnotation superclass];
    }
    
    if ([referenceAnnotationClass isEqual:[CPDFTextWidgetAnnotation class]]) {
        referenceAnnotationClass = [CPDFTextWidgetAnnotation superclass];
    }
    
    if ([referenceAnnotationClass isEqual:[CPDFChoiceWidgetAnnotation class]]) {
          referenceAnnotationClass = [CPDFChoiceWidgetAnnotation superclass];
      }
    
    if (annotationArray.count == 1) {
        if ([referenceAnnotation isKindOfClass:[CPDFTextWidgetAnnotation class]]) {
            return KMPDFViewActiveFormsType_TextSingle;
        } else {
            return KMPDFViewActiveFormsType_PureSingle;
        }
    }
    
    for (NSInteger i = 0; i < annotationArray.count; i++) {
        PDFAnnotation *annotation = [annotationArray objectAtIndex:i];
        if (![annotation isKindOfClass:[CPDFButtonWidgetAnnotation class]] && ![annotation isKindOfClass:[CPDFTextWidgetAnnotation class]] && ![annotation isKindOfClass:[CPDFChoiceWidgetAnnotation class]]) {
            return KMPDFViewActiveFormsType_Mix;
        }
    }
    
    if ([referenceAnnotation isKindOfClass:[CPDFTextWidgetAnnotation class]]){
        return KMPDFViewActiveFormsType_Text;
    }
    
    return KMPDFViewActiveFormsType_Pure;
}

- (void)formsAnnotationAlign:(KMPDFActiveFormsAlignType)type {
    CGRect zeroRect = CGRectNull;
    CGRect highestRect = CGRectZero;
    CGRect widthestRect = CGRectZero;
    
    CPDFAnnotation *firstAnnotation = self.activeAnnotations.firstObject;
    CGRect leftestRect = firstAnnotation.bounds;
    CGRect rightestRect = firstAnnotation.bounds;
    CGRect topestRect = firstAnnotation.bounds;
    CGRect bottomestRect = firstAnnotation.bounds;
    
    CPDFAnnotation *leftestAnnotation = firstAnnotation;
    CPDFAnnotation *rightestAnnotation = firstAnnotation;
    CPDFAnnotation *topestAnnotation = firstAnnotation;
    CPDFAnnotation *bottomestAnnotation = firstAnnotation;
    
    CGFloat totalWidth = 0.;
    CGFloat totalHeight = 0.;

    for (CPDFAnnotation *annotation in self.activeAnnotations) {
        zeroRect = CGRectUnion(zeroRect, annotation.bounds);
        totalWidth += CGRectGetWidth(annotation.bounds);
        totalHeight += CGRectGetHeight(annotation.bounds);
        if (CGRectGetHeight(annotation.bounds) > CGRectGetHeight(highestRect)) {
            highestRect = annotation.bounds;
        }
        
        if (CGRectGetWidth(annotation.bounds) > CGRectGetWidth(widthestRect)) {
            widthestRect = annotation.bounds;
        }
        
        if (CGRectGetMinX(leftestRect) > CGRectGetMinX(annotation.bounds)) {
            leftestRect = annotation.bounds;
            leftestAnnotation = annotation;
        }
        
        if (CGRectGetMaxX(annotation.bounds) > CGRectGetMaxX(rightestRect)) {
            rightestRect = annotation.bounds;
            rightestAnnotation = annotation;
        }
        
        if (CGRectGetMaxY(annotation.bounds) > CGRectGetMaxY(topestRect)) {
            topestRect = annotation.bounds;
            topestAnnotation = annotation;
        }
        
        if (CGRectGetMinY(bottomestRect) > CGRectGetMinY(annotation.bounds)) {
            bottomestRect = annotation.bounds;
            bottomestAnnotation = annotation;
        }
    }

    if (type == KMPDFActiveFormsAlignType_Left ) {
        NSMutableArray *newBoundsArray = [NSMutableArray array];
        for (NSInteger i = 0; i< self.activeAnnotations.count; i++) {
            CPDFAnnotation *annotation = [self.activeAnnotations objectAtIndex:i];
            CGRect bounds = annotation.bounds;
            bounds.origin.x = zeroRect.origin.x;
            [newBoundsArray addObject:NSStringFromRect(bounds)];
        }
        [self changeAnnotationsAlign:self.activeAnnotations newBounds:newBoundsArray];
    } else if (type == KMPDFActiveFormsAlignType_Right) {
        NSMutableArray *newBoundsArray = [NSMutableArray array];
         for (NSInteger i = 0; i< self.activeAnnotations.count; i++) {
             CPDFAnnotation *annotation = [self.activeAnnotations objectAtIndex:i];
             CGRect bounds = annotation.bounds;
             bounds.origin.x = CGRectGetMaxX(zeroRect) - bounds.size.width;
             [newBoundsArray addObject:NSStringFromRect(bounds)];
         }
        [self changeAnnotationsAlign:self.activeAnnotations newBounds:newBoundsArray];
    } else if (type == KMPDFActiveFormsAlignType_Top) {
        NSMutableArray *newBoundsArray = [NSMutableArray array];
            for (NSInteger i = 0; i< self.activeAnnotations.count; i++) {
                CPDFAnnotation *annotation = [self.activeAnnotations objectAtIndex:i];
                CGRect bounds = annotation.bounds;
                bounds.origin.y =  CGRectGetMaxY(zeroRect) - bounds.size.height;
                [newBoundsArray addObject:NSStringFromRect(bounds)];
            }
        [self changeAnnotationsAlign:self.activeAnnotations newBounds:newBoundsArray];
    } else if (type == KMPDFActiveFormsAlignType_Bottom) {
        NSMutableArray *newBoundsArray = [NSMutableArray array];
        for (NSInteger i = 0; i< self.activeAnnotations.count; i++) {
            CPDFAnnotation *annotation = [self.activeAnnotations objectAtIndex:i];
            CGRect bounds = annotation.bounds;
            bounds.origin.y = CGRectGetMinY(zeroRect);
            [newBoundsArray addObject:NSStringFromRect(bounds)];
        }
        [self changeAnnotationsAlign:self.activeAnnotations newBounds:newBoundsArray];
    } else if (type == KMPDFActiveFormsAlignType_Horizontally) {
        NSMutableArray *newBoundsArray = [NSMutableArray array];
        for (NSInteger i = 0; i< self.activeAnnotations.count; i++) {
            CPDFAnnotation *annotation = [self.activeAnnotations objectAtIndex:i];
            CGRect bounds = annotation.bounds;
            bounds.origin.y = CGRectGetMidY(highestRect) - CGRectGetHeight(bounds)/2;
            [newBoundsArray addObject:NSStringFromRect(bounds)];
        }
        [self changeAnnotationsAlign:self.activeAnnotations newBounds:newBoundsArray];
    } else if (type == KMPDFActiveFormsAlignType_Vertical) {
        NSMutableArray *newBoundsArray = [NSMutableArray array];
        for (NSInteger i = 0; i< self.activeAnnotations.count; i++) {
            CPDFAnnotation *annotation = [self.activeAnnotations objectAtIndex:i];
            CGRect bounds = annotation.bounds;
            bounds.origin.x = CGRectGetMidX(widthestRect) - CGRectGetWidth(bounds)/2;
            [newBoundsArray addObject:NSStringFromRect(bounds)];
        }
        [self changeAnnotationsAlign:self.activeAnnotations newBounds:newBoundsArray];
    } else if (type == KMPDFActiveFormsAlignType_DisHorizontally) {
        CGFloat middleGap = CGRectGetWidth(zeroRect) - CGRectGetWidth(leftestRect) - CGRectGetWidth(rightestRect);
        CGFloat otherAnnotationsTotalWidth = totalWidth - CGRectGetWidth(leftestRect) - CGRectGetWidth(rightestRect);
        
        CGFloat gap = (middleGap - otherAnnotationsTotalWidth)/(self.activeAnnotations.count - 1);
        NSMutableArray *annotationsCopyArray = [self.activeAnnotations mutableCopy];
        [annotationsCopyArray sortUsingComparator:^NSComparisonResult(id  _Nonnull obj1, id  _Nonnull obj2) {
            CPDFAnnotation *annotation1 = (CPDFAnnotation *)obj1;
            CPDFAnnotation *annotation2 = (CPDFAnnotation *)obj2;
            if (annotation1.bounds.origin.x < annotation2.bounds.origin.x) {
                return NSOrderedAscending;
            } else {
                return NSOrderedDescending;
            }
        }];
        
        [annotationsCopyArray removeObject:leftestAnnotation];
        [annotationsCopyArray removeObject:rightestAnnotation];
        
        NSMutableArray *newBoundsArray = [NSMutableArray array];
        
        CGFloat leftStartX = CGRectGetMaxX(leftestRect) + gap;
        for (NSInteger i = 0; i < annotationsCopyArray.count; i++) {
            CPDFAnnotation *annotation = [annotationsCopyArray objectAtIndex:i];
            CGRect bounds = annotation.bounds;
            bounds.origin.x =  leftStartX;
            [newBoundsArray addObject:NSStringFromRect(bounds)];
            leftStartX += CGRectGetWidth(bounds) + gap;
        }
        [self changeAnnotationsAlign:annotationsCopyArray newBounds:newBoundsArray];
    } else if (type == KMPDFActiveFormsAlignType_DisVertical) {
        CGFloat middleGap = CGRectGetHeight(zeroRect) - CGRectGetHeight(topestRect) - CGRectGetHeight(bottomestRect);
        CGFloat otherAnnotationsTotalHeight = totalHeight - CGRectGetHeight(topestRect) - CGRectGetHeight(bottomestRect);
        
        CGFloat gap = (middleGap - otherAnnotationsTotalHeight)/(self.activeAnnotations.count - 1);
        NSMutableArray *annotationsCopyArray = [self.activeAnnotations mutableCopy];
        [annotationsCopyArray sortUsingComparator:^NSComparisonResult(id  _Nonnull obj1, id  _Nonnull obj2) {
            CPDFAnnotation *annotation1 = (CPDFAnnotation *)obj1;
            CPDFAnnotation *annotation2 = (CPDFAnnotation *)obj2;
            if (annotation1.bounds.origin.y < annotation2.bounds.origin.y) {
                return NSOrderedAscending;
            } else {
                return NSOrderedDescending;
            }
        }];
        
        [annotationsCopyArray removeObject:topestAnnotation];
        [annotationsCopyArray removeObject:bottomestAnnotation];
        
        NSMutableArray *newBoundsArray = [NSMutableArray array];
        
        CGFloat bottomStartY = CGRectGetMaxY(bottomestRect) + gap;
        for (NSInteger i = 0; i < annotationsCopyArray.count; i++) {
            PDFAnnotation *annotation = [annotationsCopyArray objectAtIndex:i];
            CGRect bounds = annotation.bounds;
            bounds.origin.y =  bottomStartY;
            [newBoundsArray addObject:NSStringFromRect(bounds)];
            bottomStartY += CGRectGetHeight(bounds) + gap;
        }
        [self changeAnnotationsAlign:annotationsCopyArray newBounds:newBoundsArray];
    }
}

- (void)changeAnnotationsAlign:(NSArray *)annotationArray newBounds:(NSArray *)newBoundsArray {
    NSMutableArray * oldBoundsArray = [NSMutableArray array];
    for (NSInteger i = 0; i < annotationArray.count; i++) {
        CPDFAnnotation *annotation = [annotationArray objectAtIndex:i];
        [oldBoundsArray addObject:NSStringFromRect(annotation.bounds)];
        annotation.bounds = NSRectFromString([newBoundsArray objectAtIndex:i]);
    }
    [[[self undoManager] prepareWithInvocationTarget:self] changeAnnotationsAlign:annotationArray newBounds:oldBoundsArray];
    [self setNeedsDisplay:YES];
}

@end