Epub阅读器0.0.1
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//
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// WRPageUnderline.m
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// WeRead (微信读书)
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// Reverse-engineered implementation reconstruction
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//
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// 10 methods identified from binary. WRPageUnderline renders underline
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// annotations with configurable styles (solid, dashed, wavy, dotted).
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//
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#import "WRPageUnderline.h"
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#import "WRBookmark.h"
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#pragma mark - Implementation
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@implementation WRPageUnderline
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#pragma mark - Initialization
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- (instancetype)initWithBookId:(NSString *)bookId
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chapterUid:(NSString *)chapterUid
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startPos:(NSInteger)startPos
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endPos:(NSInteger)endPos
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text:(NSString *)text
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style:(WRUnderlineStyle)style
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{
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self = [super init];
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if (self) {
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_underlineId = [[NSUUID UUID] UUIDString];
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_bookId = [bookId copy];
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_chapterUid = [chapterUid copy];
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_startPos = startPos;
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_endPos = endPos;
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_chapterOffset = startPos;
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_markedText = [text copy];
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_style = style;
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_color = [UIColor colorWithRed:0.2 green:0.2 blue:0.2 alpha:0.8];
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_createTime = [[NSDate date] timeIntervalSince1970];
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_isSynced = NO;
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}
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return self;
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}
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#pragma mark - Conversion
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- (WRBookmark *)toBookmark
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{
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WRBookmark *bm = [WRBookmark bookmarkWithBookId:_bookId
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chapterUid:_chapterUid
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offset:_startPos
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text:_markedText
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type:WRBookmarkTypeUnderline];
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bm.bookmarkId = _underlineId;
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bm.startPos = _startPos;
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bm.endPos = _endPos;
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bm.rangeLength = _endPos - _startPos;
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bm.chapterOffset = _chapterOffset;
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bm.noteContent = _noteContent;
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bm.createTime = _createTime;
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bm.isSynced = _isSynced;
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// Store underline style in extra metadata
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bm.extraMetadata = @{@"underlineStyle": @(_style)};
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return bm;
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}
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+ (nullable instancetype)fromBookmark:(WRBookmark *)bookmark
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{
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if (!bookmark || bookmark.type != WRBookmarkTypeUnderline) return nil;
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WRPageUnderline *ul = [[WRPageUnderline alloc]
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initWithBookId:bookmark.bookId
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chapterUid:bookmark.chapterUid
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startPos:bookmark.startPos
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endPos:bookmark.endPos
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text:bookmark.markText
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style:[bookmark.extraMetadata[@"underlineStyle"] integerValue]];
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ul.underlineId = bookmark.bookmarkId;
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ul.chapterOffset = bookmark.chapterOffset;
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ul.noteContent = bookmark.noteContent;
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ul.createTime = bookmark.createTime;
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ul.isSynced = bookmark.isSynced;
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return ul;
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}
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#pragma mark - Drawing
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- (UIBezierPath *)underlinePathForRect:(CGRect)rect
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{
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UIBezierPath *path = [UIBezierPath bezierPath];
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CGFloat y = CGRectGetMaxY(rect) - 2.0; // 2pt below baseline
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switch (_style) {
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case WRUnderlineStyleSolid: {
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[path moveToPoint:CGPointMake(CGRectGetMinX(rect), y)];
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[path addLineToPoint:CGPointMake(CGRectGetMaxX(rect), y)];
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path.lineWidth = 1.5;
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break;
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}
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case WRUnderlineStyleDashed: {
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[path moveToPoint:CGPointMake(CGRectGetMinX(rect), y)];
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[path addLineToPoint:CGPointMake(CGRectGetMaxX(rect), y)];
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path.lineWidth = 1.5;
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// Set dash pattern: 6pt dash, 3pt gap
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CGFloat pattern[] = {6.0, 3.0};
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[path setLineDash:pattern count:2 phase:0];
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break;
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}
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case WRUnderlineStyleWavy: {
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// Wavy underline: sine wave approximation
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CGFloat startX = CGRectGetMinX(rect);
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CGFloat endX = CGRectGetMaxX(rect);
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CGFloat width = endX - startX;
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CGFloat amplitude = 2.0;
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CGFloat wavelength = 8.0;
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[path moveToPoint:CGPointMake(startX, y)];
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for (CGFloat x = startX; x < endX; x += 1.0) {
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CGFloat progress = (x - startX) / wavelength;
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CGFloat waveY = y + sin(progress * M_PI * 2) * amplitude;
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[path addLineToPoint:CGPointMake(x, waveY)];
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}
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path.lineWidth = 1.0;
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break;
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}
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case WRUnderlineStyleDotted: {
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[path moveToPoint:CGPointMake(CGRectGetMinX(rect), y)];
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[path addLineToPoint:CGPointMake(CGRectGetMaxX(rect), y)];
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path.lineWidth = 2.0;
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CGFloat pattern[] = {1.0, 4.0};
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[path setLineDash:pattern count:2 phase:0];
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break;
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}
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}
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return path;
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}
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- (UIColor *)underlineColor
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{
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return _color ?: [UIColor darkGrayColor];
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}
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#pragma mark - Public Methods
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- (void)setStyle:(WRUnderlineStyle)style
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{
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_style = style;
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}
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- (void)setNote:(NSString *)note
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{
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_noteContent = [note copy];
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}
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- (BOOL)containsPosition:(NSInteger)position
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{
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return position >= _startPos && position < _endPos;
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}
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- (BOOL)mergeWithUnderline:(WRPageUnderline *)other
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{
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if (!other) return NO;
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// Check if ranges are adjacent or overlapping
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if (other.endPos < _startPos - 1 || other.startPos > _endPos + 1) {
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return NO; // Not adjacent
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}
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// Check same book and chapter
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if (![_bookId isEqualToString:other.bookId] ||
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![_chapterUid isEqualToString:other.chapterUid]) {
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return NO;
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}
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// Merge ranges
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_startPos = MIN(_startPos, other.startPos);
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_endPos = MAX(_endPos, other.endPos);
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// Merge text (preserve order)
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if (other.startPos < _startPos) {
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_markedText = [other.markedText stringByAppendingString:_markedText];
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} else {
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_markedText = [_markedText stringByAppendingString:other.markedText];
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}
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return YES;
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}
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- (NSInteger)rangeLength
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{
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return _endPos - _startPos;
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}
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- (NSDictionary *)toDictionary
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{
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return @{
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@"underlineId" : _underlineId ?: @"",
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@"bookId" : _bookId ?: @"",
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@"chapterUid" : _chapterUid ?: @"",
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@"startPos" : @(_startPos),
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@"endPos" : @(_endPos),
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@"chapterOffset" : @(_chapterOffset),
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@"markedText" : _markedText ?: @"",
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@"style" : @(_style),
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@"pageIndex" : @(_pageIndex),
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@"createTime" : @(_createTime),
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@"isSynced" : @(_isSynced),
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@"noteContent" : _noteContent ?: @"",
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};
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}
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+ (nullable instancetype)fromDictionary:(NSDictionary *)dict
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{
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if (!dict) return nil;
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WRPageUnderline *ul = [[WRPageUnderline alloc]
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initWithBookId:dict[@"bookId"]
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chapterUid:dict[@"chapterUid"]
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startPos:[dict[@"startPos"] integerValue]
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endPos:[dict[@"endPos"] integerValue]
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text:dict[@"markedText"]
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style:[dict[@"style"] integerValue]];
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ul.underlineId = dict[@"underlineId"];
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ul.chapterOffset = [dict[@"chapterOffset"] integerValue];
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ul.pageIndex = [dict[@"pageIndex"] integerValue];
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ul.createTime = [dict[@"createTime"] doubleValue];
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ul.isSynced = [dict[@"isSynced"] boolValue];
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ul.noteContent = dict[@"noteContent"];
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return ul;
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}
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- (NSComparisonResult)compareTo:(WRPageUnderline *)other
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{
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if (_startPos < other.startPos) return NSOrderedAscending;
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if (_startPos > other.startPos) return NSOrderedDescending;
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if (_endPos < other.endPos) return NSOrderedAscending;
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if (_endPos > other.endPos) return NSOrderedDescending;
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return NSOrderedSame;
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}
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#pragma mark - NSObject
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- (NSString *)description
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{
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return [NSString stringWithFormat:
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@"<WRPageUnderline: %@ style=%ld range=[%ld,%ld] '%@'>",
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_underlineId, (long)_style, (long)_startPos, (long)_endPos,
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[_markedText substringToIndex:MIN(30, _markedText.length)]];
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}
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@end
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