140 lines
4.4 KiB
Objective-C
140 lines
4.4 KiB
Objective-C
//
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// MIT License (MIT)
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//
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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 "RSOPMLParser.h"
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#import "RSOPMLItem.h"
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@interface RSOPMLParser()
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@property (nonatomic, assign) BOOL parsingHead;
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@property (nonatomic) RSOPMLItem *opmlDocument;
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@property (nonatomic) NSMutableArray<RSOPMLItem*> *itemStack;
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@end
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@implementation RSOPMLParser
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#pragma mark - RSXMLParserDelegate
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+ (BOOL)isOPMLParser { return YES; }
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+ (NSArray<const NSString*>*)parserRequireOrderedTags {
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return @[@"<opml", @"<outline"];
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}
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- (BOOL)xmlParserWillStartParsing {
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self.opmlDocument = [RSOPMLItem new];
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self.itemStack = [NSMutableArray arrayWithObject:self.opmlDocument];
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return YES;
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}
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- (id)xmlParserWillReturnDocument {
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return self.opmlDocument;
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}
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#pragma mark - RSSAXParserDelegate
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- (void)saxParser:(RSSAXParser *)SAXParser XMLStartElement:(const xmlChar *)localName prefix:(const xmlChar *)prefix uri:(const xmlChar *)uri numberOfNamespaces:(NSInteger)numberOfNamespaces namespaces:(const xmlChar **)namespaces numberOfAttributes:(NSInteger)numberOfAttributes numberDefaulted:(int)numberDefaulted attributes:(const xmlChar **)attributes {
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int len = xmlStrlen(localName);
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if (len == 7 && EqualBytes(localName, "outline", 7)) {
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RSOPMLItem *item = [RSOPMLItem new];
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item.attributes = [SAXParser attributesDictionary:attributes numberOfAttributes:numberOfAttributes];
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[self.itemStack.lastObject addChild:item];
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[self.itemStack addObject:item];
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}
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else if (len == 4 && EqualBytes(localName, "head", 4)) {
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self.parsingHead = YES;
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}
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else if (self.parsingHead) {
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[SAXParser beginStoringCharacters];
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}
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}
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- (void)saxParser:(RSSAXParser *)SAXParser XMLEndElement:(const xmlChar *)localName prefix:(const xmlChar *)prefix uri:(const xmlChar *)uri {
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int len = xmlStrlen(localName);
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if (len == 7 && EqualBytes(localName, "outline", 7)) {
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[self.itemStack removeLastObject]; // safe to be called on empty array
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}
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else if (len == 4 && EqualBytes(localName, "head", 4)) {
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self.parsingHead = NO;
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}
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else if (self.parsingHead) { // handle xml tags in head as if they were attributes
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NSString *key = [NSString stringWithFormat:@"%s", localName];
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[self.itemStack.lastObject setAttribute:SAXParser.currentStringWithTrimmedWhitespace forKey:key];
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}
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}
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- (NSString *)saxParser:(RSSAXParser *)SAXParser internedStringForName:(const xmlChar *)name prefix:(const xmlChar *)prefix {
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if (prefix) {
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return nil;
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}
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int len = xmlStrlen(name);
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switch (len) {
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case 4:
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if (EqualBytes(name, "text", 4)) return OPMLTextKey;
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if (EqualBytes(name, "type", 4)) return OPMLTypeKey;
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break;
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case 5:
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if (EqualBytes(name, "title", 5)) return OPMLTitleKey;
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break;
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case 6:
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if (EqualBytes(name, "xmlUrl", 6)) return OPMLXMLURLKey;
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break;
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case 7:
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if (EqualBytes(name, "version", 7)) return OPMLVersionKey;
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if (EqualBytes(name, "htmlUrl", 7)) return OPMLHMTLURLKey;
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break;
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case 11:
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if (EqualBytes(name, "description", 11)) return OPMLDescriptionKey;
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break;
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}
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return nil;
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}
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- (NSString *)saxParser:(RSSAXParser *)SAXParser internedStringForValue:(const void *)bytes length:(NSUInteger)length {
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if (length < 1) {
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return @"";
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} else if (length == 3) {
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if (EqualBytes(bytes, "RSS", 3)) return @"RSS";
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if (EqualBytes(bytes, "rss", 3)) return @"rss";
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}
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return nil;
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}
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@end
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