Refactoring to v.2.0
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relikd
@@ -1,151 +1,91 @@
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//
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// RSHTMLLinkParser.m
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// RSXML
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// MIT License (MIT)
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//
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// Created by Brent Simmons on 8/7/16.
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// Copyright © 2016 Ranchero Software, LLC. All rights reserved.
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// Copyright (c) 2016 Brent Simmons
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// Copyright (c) 2018 Oleg Geier
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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// of the Software, and to permit persons to whom the Software is furnished to do
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// so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#import <libxml/xmlstring.h>
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#import "RSHTMLLinkParser.h"
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#import "RSSAXHTMLParser.h"
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#import "RSSAXParser.h"
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#import "RSXMLData.h"
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#import "RSXMLInternal.h"
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#import "RSHTMLMetadata.h"
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#import "NSDictionary+RSXML.h"
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@interface RSHTMLLinkParser() <RSSAXHTMLParserDelegate>
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@property (nonatomic, readonly) NSMutableArray *links;
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@property (nonatomic, readonly) RSXMLData *xmlData;
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@property (nonatomic, readonly) NSMutableArray *dictionaries;
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@interface RSHTMLLinkParser()
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@property (nonatomic, readonly) NSURL *baseURL;
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@property (nonatomic) NSMutableArray<RSHTMLMetadataAnchor*> *mutableLinksList;
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@property (nonatomic) NSMutableString *currentText;
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@end
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@interface RSHTMLLink()
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@property (nonatomic, readwrite) NSString *urlString; //absolute
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@property (nonatomic, readwrite) NSString *text;
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@property (nonatomic, readwrite) NSString *title; //title attribute inside anchor tag
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@end
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@implementation RSHTMLLinkParser
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#pragma mark - RSXMLParserDelegate
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#pragma mark - Class Methods
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+ (BOOL)isHTMLParser { return YES; }
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+ (NSArray *)htmlLinksWithData:(RSXMLData *)xmlData {
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- (BOOL)xmlParserWillStartParsing {
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_baseURL = [NSURL URLWithString:self.documentURI];
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_mutableLinksList = [NSMutableArray new];
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return YES;
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}
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RSHTMLLinkParser *parser = [[self alloc] initWithXMLData:xmlData];
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return parser.links;
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- (id)xmlParserWillReturnDocument {
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return [_mutableLinksList copy];
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}
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#pragma mark - Init
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#pragma mark - RSSAXParserDelegate
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- (instancetype)initWithXMLData:(RSXMLData *)xmlData {
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NSParameterAssert(xmlData.data);
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NSParameterAssert(xmlData.urlString);
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- (void)saxParser:(RSSAXParser *)SAXParser XMLStartElement:(const xmlChar *)localName attributes:(const xmlChar **)attributes {
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self = [super init];
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if (!self) {
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return nil;
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if (EqualBytes(localName, "a", 2)) { // 2 because length is not checked
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NSDictionary *attribs = [SAXParser attributesDictionaryHTML:attributes];
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if (!attribs || attribs.count == 0) {
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return;
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}
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NSString *href = [attribs rsxml_objectForCaseInsensitiveKey:@"href"];
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if (!href) {
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return;
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}
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RSHTMLMetadataAnchor *obj = [RSHTMLMetadataAnchor new];
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[self.mutableLinksList addObject:obj];
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// set link properties
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obj.tooltip = [attribs rsxml_objectForCaseInsensitiveKey:@"title"];
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obj.link = [[NSURL URLWithString:href relativeToURL:self.baseURL] absoluteString];
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// begin storing data for link description
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[SAXParser beginStoringCharacters];
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self.currentText = [NSMutableString new];
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}
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_links = [NSMutableArray new];
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_xmlData = xmlData;
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_dictionaries = [NSMutableArray new];
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_baseURL = [NSURL URLWithString:xmlData.urlString];
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[self parse];
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return self;
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}
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#pragma mark - Parse
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- (void)parse {
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RSSAXHTMLParser *parser = [[RSSAXHTMLParser alloc] initWithDelegate:self];
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[parser parseData:self.xmlData.data];
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[parser finishParsing];
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}
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- (RSHTMLLink *)currentLink {
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return self.links.lastObject;
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}
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static NSString *kHrefKey = @"href";
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- (NSString *)urlStringFromDictionary:(NSDictionary *)d {
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NSString *href = [d rsxml_objectForCaseInsensitiveKey:kHrefKey];
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if (!href) {
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return nil;
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}
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NSURL *absoluteURL = [NSURL URLWithString:href relativeToURL:self.baseURL];
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return absoluteURL.absoluteString;
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}
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static NSString *kTitleKey = @"title";
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- (NSString *)titleFromDictionary:(NSDictionary *)d {
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return [d rsxml_objectForCaseInsensitiveKey:kTitleKey];
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}
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- (void)handleLinkAttributes:(NSDictionary *)d {
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RSHTMLLink *link = self.currentLink;
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link.urlString = [self urlStringFromDictionary:d];
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link.title = [self titleFromDictionary:d];
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}
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static const char *kAnchor = "a";
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static const NSInteger kAnchorLength = 2;
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- (void)saxParser:(RSSAXHTMLParser *)SAXParser XMLStartElement:(const xmlChar *)localName attributes:(const xmlChar **)attributes {
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if (!RSSAXEqualTags(localName, kAnchor, kAnchorLength)) {
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return;
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}
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RSHTMLLink *link = [RSHTMLLink new];
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[self.links addObject:link];
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NSDictionary *d = [SAXParser attributesDictionary:attributes];
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if (!RSXMLIsEmpty(d)) {
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[self handleLinkAttributes:d];
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}
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[SAXParser beginStoringCharacters];
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}
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- (void)saxParser:(RSSAXParser *)SAXParser XMLEndElement:(const xmlChar *)localName {
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if (!RSSAXEqualTags(localName, kAnchor, kAnchorLength)) {
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return;
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if (self.currentText != nil) {
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NSString *str = SAXParser.currentStringWithTrimmedWhitespace;
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if (str) {
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[self.currentText appendString:str];
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}
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if (EqualBytes(localName, "a", 2)) { // 2 because length is not checked
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self.mutableLinksList.lastObject.title = self.currentText;
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self.currentText = nil;
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}
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}
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self.currentLink.text = SAXParser.currentStringWithTrimmedWhitespace;
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}
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@end
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@implementation RSHTMLLink
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@end
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