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//
// HtmlMedia.m
// Coding_iOS
//
// Created by 王 原闯 on 14-9-5.
// Copyright (c) 2014年 Coding. All rights reserved.
//
#import "HtmlMedia.h"
@implementation HtmlMedia
- (instancetype)initWithString:(NSString *)htmlString showType:(MediaShowType)showType{
self = [super init];
if (self) {
_contentOrigional = htmlString;
if (![htmlString hasPrefix:@"<body>"]) {
htmlString = [NSString stringWithFormat:@"<body>%@</body>", htmlString];
}
_contentDisplay = [NSMutableString stringWithString:@""];
_mediaItems = [[NSMutableArray alloc] init];
NSData *data=[htmlString dataUsingEncoding:NSUTF8StringEncoding];
TFHpple *doc = [TFHpple hppleWithHTMLData:data];
TFHppleElement *rootElement = [doc peekAtSearchWithXPathQuery:@"//body"];
[self analyseHtmlElement:rootElement withShowType:showType];
_imageItems = [_mediaItems filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"type == %d OR type == %d", HtmlMediaItemType_Image, HtmlMediaItemType_EmotionMonkey]];
//过滤末尾无用的空格&空行
NSRange contentRange = [_contentDisplay rangeByTrimmingRightCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
if (_mediaItems.count > 0) {
HtmlMediaItem *item;
for (int i = (int)_mediaItems.count; i > 0; i--) {
item = [_mediaItems objectAtIndex:i-1];
if (item.displayStr.length > 0) {
contentRange.length = MAX(contentRange.length, item.range.location +item.range.length);
break;
}
}
}
if (contentRange.length < _contentDisplay.length) {
[_contentDisplay deleteCharactersInRange:NSMakeRange(contentRange.length, _contentDisplay.length - contentRange.length)];
}
}
return self;
}
- (void)analyseHtmlElement:(TFHppleElement* )element withShowType:(MediaShowType)showType{
HtmlMediaItem *item = nil;
if (element.isTextNode) {
if ([element.content stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]].length > 0) {
[_contentDisplay appendString:element.content];
}else if (![_contentDisplay hasSuffix:@"\n"] && _contentDisplay.length > 0){
NSCharacterSet *lineSet = [NSCharacterSet newlineCharacterSet];
if ([element.content rangeOfCharacterFromSet:lineSet].location != NSNotFound) {
[_contentDisplay appendString:@"\n"];
}else{
[_contentDisplay appendString:element.content];
}
}
}else if ([element.tagName isEqualToString:@"br"]){
if (![_contentDisplay hasSuffix:@"\n"] && _contentDisplay.length > 0) {
[_contentDisplay appendString:@"\n"];
}
}else if ([element.attributes[@"class"] isEqualToString:@"kdmath"]) {
item = [HtmlMediaItem htmlMediaItemWithType:HtmlMediaItemType_Math];
item.code = [element.text trimWhitespace];
}else if ([element.tagName isEqualToString:@"code"]) {
item = [HtmlMediaItem htmlMediaItemWithType:HtmlMediaItemType_Code];
item.code = [element.text trimWhitespace];
}else if ([element.tagName isEqualToString:@"a"]) {
NSDictionary *attributes = element.attributes;
NSString *element_Class = [attributes objectForKey:@"class"];
if ([element_Class isEqualToString:@"at-someone"]) {
//@了某个人
item = [HtmlMediaItem htmlMediaItemWithType:HtmlMediaItemType_ATUser];
item.href = [attributes objectForKey:@"href"];
item.name = element.text? element.text: @"";
}else if ([element_Class hasPrefix:@"bubble-markdown-image-link"]){
//图片
item = [HtmlMediaItem htmlMediaItemWithType:HtmlMediaItemType_Image];
item.href = [attributes objectForKey:@"href"];
TFHppleElement *child = [element.children firstObject];
if (child && [child.attributes objectForKey:@"src"]) {
item.src = [child.attributes objectForKey:@"src"];
}else{
item.src = [attributes objectForKey:@"href"];
}
}else{
//网址
if (element.text.length > 0) {
item = [HtmlMediaItem htmlMediaItemWithType:HtmlMediaItemType_AutoLink];
item.href = [attributes objectForKey:@"href"];
item.linkStr = element.text;
}
}
}else if ([element.tagName isEqualToString:@"img"]){
NSDictionary *attributes = element.attributes;
NSString *element_Class = [attributes objectForKey:@"class"];
if ([element_Class isEqualToString:@"emotion emoji"]){
//Emoji
NSString *emojiAliase = [NSString stringWithFormat:@":%@:", [attributes objectForKey:@"title"]];
NSString *emojiCode = [emojiAliase toEmoji];
if (emojiCode) {
[_contentDisplay appendString:emojiCode];
}else{
item = [HtmlMediaItem htmlMediaItemWithType:HtmlMediaItemType_EmotionEmoji];
item.src = [attributes objectForKey:@"src"];
NSString *emotionStr;
if ([attributes objectForKey:@"title"]) {
emotionStr = [NSString stringWithFormat:@"%@", [attributes objectForKey:@"title"]];
}else if (item.src){
emotionStr = [NSString stringWithFormat:@"%@", [[item.src componentsSeparatedByString:@"/"].lastObject componentsSeparatedByString:@"."].firstObject];
}
item.title = emotionStr;
}
}else if ([element_Class isEqualToString:@"emotion monkey"]){
//Monkey
item = [HtmlMediaItem htmlMediaItemWithType:HtmlMediaItemType_EmotionMonkey];
item.src = [attributes objectForKey:@"src"];
NSString *emotionStr;
if ([attributes objectForKey:@"title"]) {
emotionStr = [NSString stringWithFormat:@"%@", [attributes objectForKey:@"title"]];
}else if (item.src){
emotionStr = [NSString stringWithFormat:@"%@", [[item.src componentsSeparatedByString:@"/"].lastObject componentsSeparatedByString:@"."].firstObject];
}
item.title = emotionStr;
}else {
//图片
item = [HtmlMediaItem htmlMediaItemWithType:HtmlMediaItemType_Image];
item.src = [attributes objectForKey:@"src"];
}
}
if (item) {
item.showType = showType;
item.range = NSMakeRange(_contentDisplay.length, item.displayStr.length);
[_mediaItems addObject:item];
[_contentDisplay appendString:item.displayStr];
return;
}
if (element.hasChildren) {
for (TFHppleElement *child in [element children]) {
[self analyseHtmlElement:child withShowType:showType];
}
}
}
- (void)removeItem:(HtmlMediaItem *)delItem{
NSInteger index = [_mediaItems indexOfObject:delItem];
if (index != NSNotFound) {
//处理链接左侧字符串尾部的空格
if (delItem.range.location > 0) {
NSString *lStr = [_contentDisplay substringToIndex:delItem.range.location];
NSRange lRange = [lStr rangeByTrimmingRightCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSUInteger diffLength = lStr.length - lRange.length;
if (diffLength > 0) {
delItem.range = NSMakeRange(delItem.range.location - diffLength, delItem.range.length + diffLength);
}
}
//处理链接右侧字符串头部的空格
if (delItem.range.location + delItem.range.length < _contentDisplay.length) {
NSString *rStr = [_contentDisplay substringFromIndex:delItem.range.location + delItem.range.length];
NSRange rRange = [rStr rangeByTrimmingLeftCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSUInteger diffLength = rStr.length - rRange.length;
if (diffLength > 0) {
delItem.range = NSMakeRange(delItem.range.location, delItem.range.length + diffLength);
}
}
//更新 _contentDisplay 和 delItem 后面 items 的 range
if (delItem.range.length > 0) {
[_mediaItems enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(HtmlMediaItem * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
if (idx > index) {
obj.range = NSMakeRange(obj.range.location - delItem.range.length, obj.range.length);
}else{
*stop = YES;
}
}];
[_contentDisplay replaceCharactersInRange:delItem.range withString:@""];
}
//删除 delItem
[_mediaItems removeObject:delItem];
}
}
- (BOOL)needToShowDetail{
for (HtmlMediaItem *item in _mediaItems) {
if (item.type == HtmlMediaItemType_Code || item.type == HtmlMediaItemType_Math) {
return YES;
}
}
return NO;
}
+ (instancetype)htmlMediaWithString:(NSString *)htmlString showType:(MediaShowType)showType{
return [[[self class] alloc] initWithString:htmlString showType:showType];
}
+ (void)addMediaItem:(HtmlMediaItem *)curItem toString:(NSMutableString *)curString andMediaItems:(NSMutableArray *)itemList{
[itemList addObject:curItem];
[curString appendString:curItem.displayStr];
}
+ (void)addLinkStr:(NSString *)linkStr type:(HtmlMediaItemType)type toString:(NSMutableString *)curString andMediaItems:(NSMutableArray *)itemList{
if (!linkStr || !curString) {
return;
}
HtmlMediaItem *curItem = [HtmlMediaItem htmlMediaItemWithType:type];
curItem.linkStr = linkStr;
curItem.range = NSMakeRange(curString.length, curItem.displayStr.length);
[itemList addObject:curItem];
[curString appendString:curItem.displayStr];
}
+ (void)addMediaItemUser:(User *)curUser toString:(NSMutableString *)curString andMediaItems:(NSMutableArray *)itemList{
HtmlMediaItem *userItem = [HtmlMediaItem htmlMediaItemWithTypeATUser:curUser mediaRange:NSMakeRange(curString.length, curUser.name.length)];
[self addMediaItem:userItem toString:curString andMediaItems:itemList];
}
@end
@implementation HtmlMediaItem
- (instancetype)init
{
self = [super init];
if (self) {
}
return self;
}
+ (instancetype)htmlMediaItemWithType:(HtmlMediaItemType)type{
HtmlMediaItem *item = [[HtmlMediaItem alloc] init];
item.type = type;
return item;
}
+ (instancetype)htmlMediaItemWithTypeATUser:(User *)curUser mediaRange:(NSRange)curRange{
HtmlMediaItem *item = [HtmlMediaItem htmlMediaItemWithType:HtmlMediaItemType_ATUser];
item.name = curUser.name;
item.href = [NSString stringWithFormat:@"/u/%@", curUser.global_key];
item.range = curRange;
return item;
}
- (NSString *)displayStr{
NSString *displayStr;
switch (_type) {
case HtmlMediaItemType_Image:
displayStr = (_showType % MediaShowTypeImage == 0)? @"[图片]": @"";
break;
case HtmlMediaItemType_Code:
displayStr = (_showType % MediaShowTypeCode == 0)? [NSString stringWithFormat:@"[%@]", _code]: @"[code]";
break;
case HtmlMediaItemType_EmotionEmoji:
displayStr = [NSString stringWithFormat:@"[%@]", _title];
break;
case HtmlMediaItemType_EmotionMonkey:
displayStr = (_showType % MediaShowTypeMonkey == 0)? @"[洋葱猴]": @"";
break;
case HtmlMediaItemType_ATUser:
displayStr = _name;
break;
case HtmlMediaItemType_AutoLink:
case HtmlMediaItemType_CustomLink:
displayStr = [_linkStr stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
break;
case HtmlMediaItemType_Math:
displayStr = @"[math]";
break;
default:
displayStr = @"";
break;
}
return displayStr? displayStr : @"";
}
- (BOOL)isGif{
return self.type == HtmlMediaItemType_Image && [self.src rangeOfString:@".gif"].location != NSNotFound;
}
@end
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