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HTMLParser.m
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// HTMLParser.m
//
// Public domain. https://github.com/nolanw/HTMLReader
#import "HTMLParser.h"
#import "HTMLComment.h"
#import "HTMLString.h"
#import "HTMLTokenizer.h"
@interface HTMLMarker : NSObject <NSCopying>
+ (instancetype)marker;
@end
typedef NS_ENUM(NSInteger, HTMLInsertionMode)
{
HTMLInvalidInsertionMode, // SPEC This faux insertion mode is just for us.
HTMLInitialInsertionMode,
HTMLBeforeHtmlInsertionMode,
HTMLBeforeHeadInsertionMode,
HTMLInHeadInsertionMode,
HTMLInHeadNoscriptInsertionMode,
HTMLAfterHeadInsertionMode,
HTMLInBodyInsertionMode,
HTMLTextInsertionMode,
HTMLInTableInsertionMode,
HTMLInTableTextInsertionMode,
HTMLInCaptionInsertionMode,
HTMLInColumnGroupInsertionMode,
HTMLInTableBodyInsertionMode,
HTMLInRowInsertionMode,
HTMLInCellInsertionMode,
HTMLInSelectInsertionMode,
HTMLInSelectInTableInsertionMode,
HTMLAfterBodyInsertionMode,
HTMLInFramesetInsertionMode,
HTMLAfterFramesetInsertionMode,
HTMLAfterAfterBodyInsertionMode,
HTMLAfterAfterFramesetInsertionMode,
HTMLForeignContentInsertionMode, // SPEC This faux insertion mode is just for us.
};
@interface HTMLParser ()
@property (readonly, strong, nonatomic) HTMLElement *currentNode;
@end
@implementation HTMLParser
{
HTMLTokenizer *_tokenizer;
HTMLInsertionMode _insertionMode;
HTMLInsertionMode _originalInsertionMode;
HTMLElement *_context;
NSMutableArray *_stackOfOpenElements;
HTMLElement *_headElementPointer;
HTMLElement *_formElementPointer;
HTMLDocument *_document;
NSMutableArray *_errors;
BOOL _framesetOkFlag;
BOOL _ignoreNextTokenIfLineFeed;
NSMutableArray *_activeFormattingElements;
NSMutableString *_pendingTableCharacters;
BOOL _fosterParenting;
BOOL _done;
BOOL _fragmentParsingAlgorithm;
}
- (instancetype)initWithString:(NSString *)string encoding:(HTMLStringEncoding)encoding context:(HTMLElement *)context
{
if ((self = [super init])) {
_tokenizer = [[HTMLTokenizer alloc] initWithString:string];
_tokenizer.parser = self;
_encoding = encoding;
_context = context;
_insertionMode = HTMLInitialInsertionMode;
_stackOfOpenElements = [NSMutableArray new];
_errors = [NSMutableArray new];
_framesetOkFlag = YES;
_activeFormattingElements = [NSMutableArray new];
_fragmentParsingAlgorithm = !!context;
if (context) {
if (context.htmlNamespace == HTMLNamespaceHTML) {
if (StringIsEqualToAnyOf(context.tagName, @"title", @"textarea")) {
_tokenizer.state = HTMLRCDATATokenizerState;
} else if (StringIsEqualToAnyOf(context.tagName, @"style", @"xmp", @"iframe", @"noembed", @"noframes")) {
_tokenizer.state = HTMLRAWTEXTTokenizerState;
} else if ([context.tagName isEqualToString:@"script"]) {
_tokenizer.state = HTMLScriptDataTokenizerState;
} else if ([context.tagName isEqualToString:@"noscript"]) {
_tokenizer.state = HTMLRAWTEXTTokenizerState;
} else if ([context.tagName isEqualToString:@"plaintext"]) {
_tokenizer.state = HTMLPLAINTEXTTokenizerState;
}
}
_encoding = (HTMLStringEncoding){
.encoding = NSUTF8StringEncoding,
.confidence = Irrelevant
};
}
}
return self;
}
- (instancetype)init
{
return [self initWithString:@"" encoding:(HTMLStringEncoding){.encoding = NSUTF8StringEncoding, .confidence = Tentative} context:nil];
}
- (NSString *)string
{
return _tokenizer.string;
}
- (HTMLDocument *)document
{
if (_document) return _document;
_document = [HTMLDocument new];
if (_fragmentParsingAlgorithm) {
HTMLElement *root = [[HTMLElement alloc] initWithTagName:@"html" attributes:nil];
_document.rootElement = root;
[_stackOfOpenElements setArray:@[ root ]];
[self resetInsertionModeAppropriately];
HTMLElement *nearestForm = _context;
while (nearestForm) {
if ([nearestForm.tagName isEqualToString:@"form"]) {
break;
}
nearestForm = nearestForm.parentElement;
}
_formElementPointer = (HTMLElement *)nearestForm;
}
for (id token in _tokenizer) {
if (_done) break;
[self processToken:token];
}
[self processToken:[HTMLEOFToken new]];
if (_context) {
HTMLNode *root = _document.children[0];
NSMutableOrderedSet *documentChildren = [_document mutableChildren];
[documentChildren removeAllObjects];
[documentChildren addObjectsFromArray:root.children.array];
}
return _document;
}
- (NSArray *)errors
{
return [_errors copy];
}
#pragma mark - The "initial" insertion mode
- (void)initialInsertionModeHandleCharacterToken:(HTMLCharacterToken *)token
{
HTMLCharacterToken *afterWhitespace = [token afterLeadingWhitespaceToken];
if (afterWhitespace) {
[self initialInsertionModeHandleAnythingElse:afterWhitespace];
}
}
- (void)initialInsertionModeHandleCommentToken:(HTMLCommentToken *)token
{
[self insertComment:token.data inNode:_document];
}
- (void)initialInsertionModeHandleDOCTYPEToken:(HTMLDOCTYPEToken *)token
{
NSString *name = token.name;
NSString *public = token.publicIdentifier;
NSString *system = token.systemIdentifier;
if (^{
if (![name isEqualToString:@"html"]) return YES;
if ([public isEqualToString:@"-//W3C//DTD HTML 4.0//EN"] &&
(!system || [system isEqualToString:@"http://www.w3.org/TR/REC-html40/strict.dtd"]))
{
return NO;
}
if ([public isEqualToString:@"-//W3C//DTD HTML 4.01//EN"] &&
(!system || [system isEqualToString:@"http://www.w3.org/TR/html4/strict.dtd"]))
{
return NO;
}
if ([public isEqualToString:@"-//W3C//DTD XHTML 1.0 Strict//EN"] &&
[system isEqualToString:@"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"])
{
return NO;
}
if ([public isEqualToString:@"-//W3C//DTD XHTML 1.1//EN"] &&
[system isEqualToString:@"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"])
{
return NO;
}
if (public) return YES;
if (system && ![system isEqualToString:@"about:legacy-compat"]) return YES;
return NO;
}())
{
[self addParseError:@"Invalid DOCTYPE"];
}
_document.documentType = [[HTMLDocumentType alloc] initWithName:(token.name ?: @"html")
publicIdentifier:token.publicIdentifier
systemIdentifier:token.systemIdentifier];
_document.quirksMode = ^{
if (token.forceQuirks) return HTMLQuirksModeQuirks;
if (![name isEqualToString:@"html"]) return HTMLQuirksModeQuirks;
static NSString * Prefixes[] = {
@"+//Silmaril//dtd html Pro v0r11 19970101//",
@"-//AdvaSoft Ltd//DTD HTML 3.0 asWedit + extensions//",
@"-//AS//DTD HTML 3.0 asWedit + extensions//",
@"-//IETF//DTD HTML 2.0 Level 1//",
@"-//IETF//DTD HTML 2.0 Level 2//",
@"-//IETF//DTD HTML 2.0 Strict Level 1//",
@"-//IETF//DTD HTML 2.0 Strict Level 2//",
@"-//IETF//DTD HTML 2.0 Strict//",
@"-//IETF//DTD HTML 2.0//",
@"-//IETF//DTD HTML 2.1E//",
@"-//IETF//DTD HTML 3.0//",
@"-//IETF//DTD HTML 3.2 Final//",
@"-//IETF//DTD HTML 3.2//",
@"-//IETF//DTD HTML 3//",
@"-//IETF//DTD HTML Level 0//",
@"-//IETF//DTD HTML Level 1//",
@"-//IETF//DTD HTML Level 2//",
@"-//IETF//DTD HTML Level 3//",
@"-//IETF//DTD HTML Strict Level 0//",
@"-//IETF//DTD HTML Strict Level 1//",
@"-//IETF//DTD HTML Strict Level 2//",
@"-//IETF//DTD HTML Strict Level 3//",
@"-//IETF//DTD HTML Strict//",
@"-//IETF//DTD HTML//",
@"-//Metrius//DTD Metrius Presentational//",
@"-//Microsoft//DTD Internet Explorer 2.0 HTML Strict//",
@"-//Microsoft//DTD Internet Explorer 2.0 HTML//",
@"-//Microsoft//DTD Internet Explorer 2.0 Tables//",
@"-//Microsoft//DTD Internet Explorer 3.0 HTML Strict//",
@"-//Microsoft//DTD Internet Explorer 3.0 HTML//",
@"-//Microsoft//DTD Internet Explorer 3.0 Tables//",
@"-//Netscape Comm. Corp.//DTD HTML//",
@"-//Netscape Comm. Corp.//DTD Strict HTML//",
@"-//O'Reilly and Associates//DTD HTML 2.0//",
@"-//O'Reilly and Associates//DTD HTML Extended 1.0//",
@"-//O'Reilly and Associates//DTD HTML Extended Relaxed 1.0//",
@"-//SoftQuad Software//DTD HoTMetaL PRO 6.0::19990601::extensions to HTML 4.0//",
@"-//SoftQuad//DTD HoTMetaL PRO 4.0::19971010::extensions to HTML 4.0//",
@"-//Spyglass//DTD HTML 2.0 Extended//",
@"-//SQ//DTD HTML 2.0 HoTMetaL + extensions//",
@"-//Sun Microsystems Corp.//DTD HotJava HTML//",
@"-//Sun Microsystems Corp.//DTD HotJava Strict HTML//",
@"-//W3C//DTD HTML 3 1995-03-24//",
@"-//W3C//DTD HTML 3.2 Draft//",
@"-//W3C//DTD HTML 3.2 Final//",
@"-//W3C//DTD HTML 3.2//",
@"-//W3C//DTD HTML 3.2S Draft//",
@"-//W3C//DTD HTML 4.0 Frameset//",
@"-//W3C//DTD HTML 4.0 Transitional//",
@"-//W3C//DTD HTML Experimental 19960712//",
@"-//W3C//DTD HTML Experimental 970421//",
@"-//W3C//DTD W3 HTML//",
@"-//W3O//DTD W3 HTML 3.0//",
@"-//WebTechs//DTD Mozilla HTML 2.0//",
@"-//WebTechs//DTD Mozilla HTML//",
};
for (size_t i = 0; i < sizeof(Prefixes) / sizeof(Prefixes[0]); i++) {
if ([public hasPrefix:Prefixes[i]]) {
return HTMLQuirksModeQuirks;
}
}
if ([public isEqualToString:@"-//W3O//DTD W3 HTML Strict 3.0//EN//"] ||
[public isEqualToString:@"-/W3C/DTD HTML 4.0 Transitional/EN"] ||
[public isEqualToString:@"HTML"])
{
return HTMLQuirksModeQuirks;
}
if ([system isEqualToString:@"http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd"]) {
return HTMLQuirksModeQuirks;
}
if (!system) {
if ([public hasPrefix:@"-//W3C//DTD HTML 4.01 Frameset//"] ||
[public hasPrefix:@"-//W3C//DTD HTML 4.01 Transitional//"])
{
return HTMLQuirksModeQuirks;
}
}
if ([public hasPrefix:@"-//W3C//DTD XHTML 1.0 Frameset//"] ||
[public hasPrefix:@"-//W3C//DTD XHTML 1.0 Transitional//"])
{
return HTMLQuirksModeLimitedQuirks;
}
if (system) {
if ([public hasPrefix:@"-//W3C//DTD HTML 4.01 Frameset//"] ||
[public hasPrefix:@"-//W3C//DTD HTML 4.01 Transitional//"])
{
return HTMLQuirksModeLimitedQuirks;
}
}
return HTMLQuirksModeNoQuirks;
}();
[self switchInsertionMode:HTMLBeforeHtmlInsertionMode];
}
- (void)initialInsertionModeHandleAnythingElse:(id)token
{
[self addParseError:@"Expected DOCTYPE"];
_document.quirksMode = HTMLQuirksModeQuirks;
[self switchInsertionMode:HTMLBeforeHtmlInsertionMode];
[self reprocessToken:token];
}
#pragma mark The "before html" insertion mode
- (void)beforeHtmlInsertionModeHandleDOCTYPEToken:(HTMLDOCTYPEToken *)token
{
[self addParseError:@"Unexpected DOCTYPE"];
}
- (void)beforeHtmlInsertionModeHandleCommentToken:(HTMLCommentToken *)token
{
[self insertComment:token.data inNode:_document];
}
- (void)beforeHtmlInsertionModeHandleCharacterToken:(HTMLCharacterToken *)token
{
HTMLCharacterToken *afterWhitespace = [token afterLeadingWhitespaceToken];
if (afterWhitespace) {
[self beforeHtmlInsertionModeHandleAnythingElse:afterWhitespace];
}
}
- (void)beforeHtmlInsertionModeHandleStartTagToken:(HTMLStartTagToken *)token
{
if ([token.tagName isEqualToString:@"html"]) {
HTMLElement *html = [self createElementForToken:token];
[[_document mutableChildren] addObject:html];
[_stackOfOpenElements addObject:html];
[self switchInsertionMode:HTMLBeforeHeadInsertionMode];
} else {
[self beforeHtmlInsertionModeHandleAnythingElse:token];
}
}
- (void)beforeHtmlInsertionModeHandleEndTagToken:(HTMLEndTagToken *)token
{
if (StringIsEqualToAnyOf(token.tagName, @"head", @"body", @"html", @"br")) {
[self beforeHtmlInsertionModeHandleAnythingElse:token];
} else {
[self addParseError:@"Unexpected end tag named %@ before <html>", token.tagName];
}
}
- (void)beforeHtmlInsertionModeHandleAnythingElse:(id)token
{
HTMLElement *html = [[HTMLElement alloc] initWithTagName:@"html" attributes:nil];
[[_document mutableChildren] addObject:html];
[_stackOfOpenElements addObject:html];
[self switchInsertionMode:HTMLBeforeHeadInsertionMode];
[self reprocessToken:token];
}
#pragma mark The "before head" insertion mode
- (void)beforeHeadInsertionModeHandleCharacterToken:(HTMLCharacterToken *)token
{
HTMLCharacterToken *afterWhitespace = [token afterLeadingWhitespaceToken];
if (afterWhitespace) {
[self beforeHeadInsertionModeHandleAnythingElse:afterWhitespace];
}
}
- (void)beforeHeadInsertionModeHandleCommentToken:(HTMLCommentToken *)token
{
[self insertComment:token.data];
}
- (void)beforeHeadInsertionModeHandleDOCTYPEToken:(HTMLDOCTYPEToken *)token
{
[self addParseError:@"Unexpected DOCTYPE before <head>"];
}
- (void)beforeHeadInsertionModeHandleStartTagToken:(HTMLStartTagToken *)token
{
if ([token.tagName isEqualToString:@"html"]) {
[self processToken:token usingRulesForInsertionMode:HTMLInBodyInsertionMode];
} else if ([token.tagName isEqualToString:@"head"]) {
HTMLElement *head = [self insertElementForToken:token];
_headElementPointer = head;
[self switchInsertionMode:HTMLInHeadInsertionMode];
} else {
[self beforeHeadInsertionModeHandleAnythingElse:token];
}
}
- (void)beforeHeadInsertionModeHandleEndTagToken:(HTMLEndTagToken *)token
{
if (StringIsEqualToAnyOf(token.tagName, @"head", @"body", @"html", @"br")) {
[self beforeHeadInsertionModeHandleAnythingElse:token];
} else {
[self addParseError:@"Unexpected end tag named %@ before <head>", token.tagName];
}
}
- (void)beforeHeadInsertionModeHandleAnythingElse:(id)token
{
HTMLStartTagToken *fakeToken = [[HTMLStartTagToken alloc] initWithTagName:@"head"];
_headElementPointer = [self insertElementForToken:fakeToken];
[self switchInsertionMode:HTMLInHeadInsertionMode];
[self reprocessToken:token];
}
#pragma mark The "in head" insertion mode
- (void)inHeadInsertionModeHandleCharacterToken:(HTMLCharacterToken *)token
{
HTMLCharacterToken *leadingWhitespace = [token leadingWhitespaceToken];
if (leadingWhitespace) {
[self insertString:leadingWhitespace.string];
}
HTMLCharacterToken *afterLeadingWhitespace = [token afterLeadingWhitespaceToken];
if (afterLeadingWhitespace) {
[self inHeadInsertionModeHandleAnythingElse:afterLeadingWhitespace];
}
}
- (void)inHeadInsertionModeHandleCommentToken:(HTMLCommentToken *)token
{
[self insertComment:token.data];
}
- (void)inHeadInsertionModeHandleDOCTYPEToken:(HTMLDOCTYPEToken *)token
{
[self addParseError:@"Unexpected DOCTYPE in <head>"];
}
- (void)inHeadInsertionModeHandleStartTagToken:(HTMLStartTagToken *)token
{
if ([token.tagName isEqualToString:@"html"]) {
[self processToken:token usingRulesForInsertionMode:HTMLInBodyInsertionMode];
} else if (StringIsEqualToAnyOf(token.tagName, @"base", @"basefont", @"bgsound", @"link")) {
[self insertElementForToken:token];
[_stackOfOpenElements removeLastObject];
} else if ([token.tagName isEqualToString:@"meta"]) {
[self insertElementForToken:token];
[_stackOfOpenElements removeLastObject];
if (self.encoding.confidence == Tentative) {
NSString *charset = token.attributes[@"charset"];
if (charset) {
NSStringEncoding encoding = StringEncodingForLabel(charset);
if (encoding != InvalidStringEncoding() && (IsASCIICompatibleEncoding(encoding) || IsUTF16Encoding(encoding))) {
[self changeEncoding:encoding];
}
} else if (token.attributes[@"http-equiv"] && [token.attributes[@"http-equiv"] caseInsensitiveCompare:@"Content-Type"] == NSOrderedSame) {
NSString *content = token.attributes[@"content"];
if (content) {
NSScanner *scanner = [NSScanner scannerWithString:content];
NSString *encodingLabel;
for (;;) {
[scanner scanUpToString:@"charset" intoString:nil];
if (![scanner scanString:@"charset" intoString:nil]) {
break;
}
if ([scanner scanString:@"=" intoString:nil]) {
NSString *quote;
if ([scanner scanString:@"\"" intoString:nil]) {
quote = @"\"";
} else if ([scanner scanString:@"'" intoString:nil]) {
quote = @"'";
}
if (quote) {
NSRange labelRange = NSMakeRange(scanner.scanLocation, 0);
[scanner scanUpToString:quote intoString:nil];
if ([scanner scanString:quote intoString:nil]) {
labelRange.length = scanner.scanLocation - 1 - labelRange.location;
encodingLabel = [scanner.string substringWithRange:labelRange];
}
} else {
[scanner scanUpToString:@";" intoString:&encodingLabel];
}
break;
}
}
if (encodingLabel) {
NSStringEncoding encoding = StringEncodingForLabel(encodingLabel);
if (encoding != InvalidStringEncoding() && (IsASCIICompatibleEncoding(encoding) || IsUTF16Encoding(encoding))) {
[self changeEncoding:encoding];
}
}
}
}
}
} else if ([token.tagName isEqualToString:@"title"]) {
[self followGenericRCDATAElementParsingAlgorithmForToken:token];
} else if (StringIsEqualToAnyOf(token.tagName, @"noscript", @"noframes", @"style")) {
[self followGenericRawTextElementParsingAlgorithmForToken:token];
} else if ([token.tagName isEqualToString:@"script"]) {
NSUInteger index;
HTMLNode *adjustedInsertionLocation = [self appropriatePlaceForInsertingANodeIndex:&index];
HTMLElement *script = [self createElementForToken:token];
[[adjustedInsertionLocation mutableChildren] insertObject:script atIndex:index];
[_stackOfOpenElements addObject:script];
_tokenizer.state = HTMLScriptDataTokenizerState;
[self switchInsertionMode:HTMLTextInsertionMode];
} else if ([token.tagName isEqualToString:@"head"]) {
[self addParseError:@"<head> already started"];
} else {
[self inHeadInsertionModeHandleAnythingElse:token];
}
}
- (void)changeEncoding:(NSStringEncoding)newEncoding
{
HTMLStringEncoding encoding = self.encoding;
if (IsUTF16Encoding(encoding.encoding)) {
encoding.confidence = Certain;
_encoding = encoding;
return;
}
if (IsUTF16Encoding(newEncoding)) {
newEncoding = NSUTF8StringEncoding;
}
if (encoding.encoding == newEncoding) {
encoding.confidence = Certain;
_encoding = encoding;
return;
}
if (self.changeEncoding) {
self.changeEncoding((HTMLStringEncoding){ .encoding = newEncoding, .confidence = Certain });
[self stopParsing];
} else {
[self addParseError:@"Wanted to change string encoding but couldn't; continuing with misinterpreted resource"];
}
}
- (void)inHeadInsertionModeHandleEndTagToken:(HTMLEndTagToken *)token
{
if ([token.tagName isEqualToString:@"head"]) {
[_stackOfOpenElements removeLastObject];
[self switchInsertionMode:HTMLAfterHeadInsertionMode];
} else if (StringIsEqualToAnyOf(token.tagName, @"body", @"html", @"br")) {
[self inHeadInsertionModeHandleAnythingElse:token];
} else {
[self addParseError:@"Unexpected end tag named %@ in head", token.tagName];
}
}
- (void)inHeadInsertionModeHandleAnythingElse:(id)token
{
[_stackOfOpenElements removeLastObject];
[self switchInsertionMode:HTMLAfterHeadInsertionMode];
[self reprocessToken:token];
}
#pragma mark The "after head" insertion mode
- (void)afterHeadInsertionModeHandleCharacterToken:(HTMLCharacterToken *)token
{
HTMLCharacterToken *leadingWhitespace = [token leadingWhitespaceToken];
if (leadingWhitespace) {
[self insertString:leadingWhitespace.string];
}
HTMLCharacterToken *afterLeadingWhitespace = [token afterLeadingWhitespaceToken];
if (afterLeadingWhitespace) {
[self afterHeadInsertionModeHandleAnythingElse:afterLeadingWhitespace];
}
}
- (void)afterHeadInsertionModeHandleCommentToken:(HTMLCommentToken *)token
{
[self insertComment:token.data];
}
- (void)afterHeadInsertionModeHandleDOCTYPEToken:(HTMLDOCTYPEToken *)token
{
[self addParseError:@"Unexpected DOCTYPE after <head>"];
}
- (void)afterHeadInsertionModeHandleStartTagToken:(HTMLStartTagToken *)token
{
if ([token.tagName isEqualToString:@"html"]) {
[self processToken:token usingRulesForInsertionMode:HTMLInBodyInsertionMode];
} else if ([token.tagName isEqualToString:@"body"]) {
[self insertElementForToken:token];
_framesetOkFlag = NO;
[self switchInsertionMode:HTMLInBodyInsertionMode];
} else if ([token.tagName isEqualToString:@"frameset"]) {
[self insertElementForToken:token];
[self switchInsertionMode:HTMLInFramesetInsertionMode];
} else if (StringIsEqualToAnyOf(token.tagName, @"base", @"basefont", @"bgsound", @"link", @"meta", @"noframes", @"script", @"style", @"title")) {
[self addParseError:@"Misnested start tag named %@ after <head>", token.tagName];
[_stackOfOpenElements addObject:_headElementPointer];
[self processToken:token usingRulesForInsertionMode:HTMLInHeadInsertionMode];
[_stackOfOpenElements removeObject:_headElementPointer];
} else if ([token.tagName isEqualToString:@"head"]) {
[self addParseError:@"Start tag named head after <head>"];
} else {
[self afterHeadInsertionModeHandleAnythingElse:token];
}
}
- (void)afterHeadInsertionModeHandleEndTagToken:(HTMLEndTagToken *)token
{
if (StringIsEqualToAnyOf(token.tagName, @"body", @"html", @"br")) {
[self afterHeadInsertionModeHandleAnythingElse:token];
} else {
[self addParseError:@"Unexpected end tag named %@ after <head>", token.tagName];
}
}
- (void)afterHeadInsertionModeHandleAnythingElse:(id)token
{
[self insertElementForToken:[[HTMLStartTagToken alloc] initWithTagName:@"body"]];
[self switchInsertionMode:HTMLInBodyInsertionMode];
[self reprocessToken:token];
}
#pragma mark The "in body" insertion mode
- (void)inBodyInsertionModeHandleCharacterToken:(HTMLCharacterToken *)token
{
NSUInteger startingLength = token.string.length;
NSString *string = [token.string stringByReplacingOccurrencesOfString:@"\0" withString:@""];
for (NSUInteger i = 0, end = startingLength - string.length; i < end; i++) {
[self addParseError:@"Ignoring U+0000 NULL in <body>"];
}
if (string.length == 0) return;
[self reconstructTheActiveFormattingElements];
[self insertString:string];
NSCharacterSet *nonWhitespaceSet = [[NSCharacterSet characterSetWithCharactersInString:@"\t\n\f\r "] invertedSet];
if ([string rangeOfCharacterFromSet:nonWhitespaceSet].location != NSNotFound) {
_framesetOkFlag = NO;
}
}
- (void)inBodyInsertionModeHandleCommentToken:(HTMLCommentToken *)token
{
[self insertComment:token.data];
}
- (void)inBodyInsertionModeHandleDOCTYPEToken:(HTMLDOCTYPEToken *)token
{
[self addParseError:@"Unexpected DOCTYPE in <body>"];
}
- (void)inBodyInsertionModeHandleStartTagToken:(HTMLStartTagToken *)token
{
if ([token.tagName isEqualToString:@"html"]) {
[self addParseError:@"Start tag named html in <body>"];
HTMLElement *element = _stackOfOpenElements[0];
NSDictionary *attributes = token.attributes;
for (NSString *attributeName in attributes) {
if (!element[attributeName]) {
element[attributeName] = (NSString * __nonnull)attributes[attributeName];
}
}
} else if (StringIsEqualToAnyOf(token.tagName, @"base", @"basefont", @"bgsound", @"link", @"meta", @"noframes", @"script", @"style", @"title")) {
[self processToken:token usingRulesForInsertionMode:HTMLInHeadInsertionMode];
} else if ([token.tagName isEqualToString:@"body"]) {
[self addParseError:@"Start tag named body in <body>"];
if (_stackOfOpenElements.count < 2 ||
![[_stackOfOpenElements[1] tagName] isEqualToString:@"body"])
{
return;
}
_framesetOkFlag = NO;
HTMLElement *body = _stackOfOpenElements[1];
NSDictionary *attributes = token.attributes;
for (NSString *attributeName in attributes) {
if (!body[attributeName]) {
body[attributeName] = (NSString * __nonnull)attributes[attributeName];
}
}
} else if ([token.tagName isEqualToString:@"frameset"]) {
[self addParseError:@"Start tag named frameset in <body>"];
if (_stackOfOpenElements.count < 2 ||
![[_stackOfOpenElements[1] tagName] isEqualToString:@"body"])
{
return;
}
if (!_framesetOkFlag) return;
HTMLNode *topOfStack = _stackOfOpenElements[0];
[[topOfStack mutableChildren] removeObject:_stackOfOpenElements[1]];
while (_stackOfOpenElements.count > 1) {
[_stackOfOpenElements removeLastObject];
}
[self insertElementForToken:token];
[self switchInsertionMode:HTMLInFramesetInsertionMode];
} else if (StringIsEqualToAnyOf(token.tagName, @"address", @"article", @"aside", @"blockquote", @"center", @"details", @"dialog", @"dir", @"div", @"dl", @"fieldset", @"figcaption", @"figure", @"footer", @"header", @"hgroup", @"main", @"nav", @"ol", @"p", @"section", @"summary", @"ul")) {
if ([self elementInButtonScopeWithTagName:@"p"]) {
[self closePElement];
}
[self insertElementForToken:token];
} else if ([token.tagName isEqualToString:@"menu"]) {
if ([self elementInButtonScopeWithTagName:@"p"]) {
[self closePElement];
}
if ([self.currentNode.tagName isEqualToString:@"menuitem"]) {
[_stackOfOpenElements removeObject:self.currentNode];
}
[self insertElementForToken:token];
} else if (StringIsEqualToAnyOf(token.tagName, @"h1", @"h2", @"h3", @"h4", @"h5", @"h6")) {
if ([self elementInButtonScopeWithTagName:@"p"]) {
[self closePElement];
}
if (StringIsEqualToAnyOf(self.currentNode.tagName, @"h1", @"h2", @"h3", @"h4", @"h5", @"h6")) {
[self addParseError:@"Nested header start tag %@ in <body>", token.tagName];
[_stackOfOpenElements removeLastObject];
}
[self insertElementForToken:token];
} else if (StringIsEqualToAnyOf(token.tagName, @"pre", @"listing")) {
if ([self elementInButtonScopeWithTagName:@"p"]) {
[self closePElement];
}
[self insertElementForToken:token];
_ignoreNextTokenIfLineFeed = YES;
_framesetOkFlag = NO;
} else if ([token.tagName isEqualToString:@"form"]) {
if (_formElementPointer) {
[self addParseError:@"Start tag named form within a form in <body>"];
return;
}
if ([self elementInButtonScopeWithTagName:@"p"]) {
[self closePElement];
}
HTMLElement *form = [self insertElementForToken:token];
_formElementPointer = form;
} else if ([token.tagName isEqualToString:@"li"]) {
_framesetOkFlag = NO;
HTMLElement *node = self.currentNode;
loop:
if ([node.tagName isEqualToString:@"li"]) {
[self generateImpliedEndTagsExceptForTagsNamed:@"li"];
if (![self.currentNode.tagName isEqualToString:@"li"]) {
[self addParseError:@"Misnested li tag in <body>"];
}
while (![self.currentNode.tagName isEqualToString:@"li"]) {
[_stackOfOpenElements removeLastObject];
}
[_stackOfOpenElements removeLastObject];
goto done;
}
if (IsSpecialElement(node) && !(node.htmlNamespace == HTMLNamespaceHTML && StringIsEqualToAnyOf(node.tagName, @"address", @"div", @"p"))) {
goto done;
}
node = [_stackOfOpenElements objectAtIndex:[_stackOfOpenElements indexOfObject:node] - 1];
goto loop;
done:
if ([self elementInButtonScopeWithTagName:@"p"]) {
[self closePElement];
}
[self insertElementForToken:token];
} else if ([token.tagName isEqualToString:@"dd"] || [token.tagName isEqualToString:@"dt"]) {
_framesetOkFlag = NO;
for (HTMLElement *node in _stackOfOpenElements.reverseObjectEnumerator) {
if ([node.tagName isEqualToString:@"dd"]) {
[self generateImpliedEndTagsExceptForTagsNamed:@"dd"];
if (![self.currentNode.tagName isEqualToString:@"dd"]) {
[self addParseError:@"Misnested dd tag in <body>"];
}
while (![self.currentNode.tagName isEqualToString:@"dd"]) {
[_stackOfOpenElements removeLastObject];
}
[_stackOfOpenElements removeLastObject];
break;
} else if ([node.tagName isEqualToString:@"dt"]) {
[self generateImpliedEndTagsExceptForTagsNamed:@"dt"];
if (![self.currentNode.tagName isEqualToString:@"dt"]) {
[self addParseError:@"Misnested dt tag in <body>"];
}
while (![self.currentNode.tagName isEqualToString:@"dt"]) {
[_stackOfOpenElements removeLastObject];
}
[_stackOfOpenElements removeLastObject];
break;
} else if (IsSpecialElement(node) && !(node.htmlNamespace == HTMLNamespaceHTML && StringIsEqualToAnyOf(node.tagName, @"address", @"div", @"p"))) {
break;
}
}
if ([self elementInButtonScopeWithTagName:@"p"]) {
[self closePElement];
}
[self insertElementForToken:token];
} else if ([token.tagName isEqualToString:@"plaintext"]) {
if ([self elementInButtonScopeWithTagName:@"p"]) {
[self closePElement];
}
[self insertElementForToken:token];
_tokenizer.state = HTMLPLAINTEXTTokenizerState;
} else if ([token.tagName isEqualToString:@"button"]) {
if ([self elementInScopeWithTagName:@"button"]) {
[self addParseError:@"Nested button tag in <body>"];
[self generateImpliedEndTags];
while (![self.currentNode.tagName isEqualToString:@"button"]) {
[_stackOfOpenElements removeLastObject];
}
[_stackOfOpenElements removeLastObject];
}
[self reconstructTheActiveFormattingElements];
[self insertElementForToken:token];
_framesetOkFlag = NO;
} else if ([token.tagName isEqualToString:@"a"]) {
for (HTMLElement *element in _activeFormattingElements.reverseObjectEnumerator.allObjects) {
if ([element isEqual:[HTMLMarker marker]]) break;
if ([element.tagName isEqualToString:@"a"]) {
[self addParseError:@"Nested start tag 'a' in <body>"];
if (![self runAdoptionAgencyAlgorithmForTagName:@"a"]) {
[self inBodyInsertionModeHandleAnyOtherEndTagToken:token];
return;
}
[self removeElementFromListOfActiveFormattingElements:element];
[_stackOfOpenElements removeObject:element];
break;
}
}
[self reconstructTheActiveFormattingElements];
HTMLElement *element = [self insertElementForToken:token];
[self pushElementOnToListOfActiveFormattingElements:element];
} else if (StringIsEqualToAnyOf(token.tagName, @"b", @"big", @"code", @"em", @"font", @"i", @"s", @"small", @"strike", @"strong", @"tt", @"u")) {
[self reconstructTheActiveFormattingElements];
HTMLElement *element = [self insertElementForToken:token];
[self pushElementOnToListOfActiveFormattingElements:element];
} else if ([token.tagName isEqualToString:@"nobr"]) {
[self reconstructTheActiveFormattingElements];
if ([self elementInScopeWithTagName:@"nobr"]) {
[self addParseError:@"Misnested nobr tag in <body>"];
if (![self runAdoptionAgencyAlgorithmForTagName:@"nobr"]) {
[self inBodyInsertionModeHandleAnyOtherEndTagToken:token];
return;
}
[self reconstructTheActiveFormattingElements];
}
HTMLElement *element = [self insertElementForToken:token];
[self pushElementOnToListOfActiveFormattingElements:element];
} else if (StringIsEqualToAnyOf(token.tagName, @"applet", @"marquee", @"object")) {
[self reconstructTheActiveFormattingElements];
[self insertElementForToken:token];
[self pushMarkerOnToListOfActiveFormattingElements];
_framesetOkFlag = NO;
} else if ([token.tagName isEqualToString:@"table"]) {
if (_document.quirksMode != HTMLQuirksModeQuirks && [self elementInButtonScopeWithTagName:@"p"]) {
[self closePElement];
}
[self insertElementForToken:token];
_framesetOkFlag = NO;
[self switchInsertionMode:HTMLInTableInsertionMode];
} else if (StringIsEqualToAnyOf(token.tagName, @"area", @"br", @"embed", @"img", @"keygen", @"wbr")) {
[self reconstructTheActiveFormattingElements];
[self insertElementForToken:token];
[_stackOfOpenElements removeLastObject];
_framesetOkFlag = NO;
} else if ([token.tagName isEqualToString:@"input"]) {
[self reconstructTheActiveFormattingElements];
[self insertElementForToken:token];
[_stackOfOpenElements removeLastObject];
NSString *type = token.attributes[@"type"];
if (!type || [type caseInsensitiveCompare:@"hidden"] != NSOrderedSame) {
_framesetOkFlag = NO;
}
} else if (StringIsEqualToAnyOf(token.tagName, @"param", @"source", @"track")) {
[self insertElementForToken:token];
[_stackOfOpenElements removeLastObject];
} else if ([token.tagName isEqualToString:@"hr"]) {
if ([self elementInButtonScopeWithTagName:@"p"]) {
[self closePElement];
}
if ([self.currentNode.tagName isEqualToString:@"menuitem"]) {
[_stackOfOpenElements removeObject:self.currentNode];
}
[self insertElementForToken:token];
[_stackOfOpenElements removeLastObject];
_framesetOkFlag = NO;
} else if ([token.tagName isEqualToString:@"image"]) {
[self addParseError:@"It's spelled 'img' in <body>"];
[self reprocessToken:[token copyWithTagName:@"img"]];
} else if ([token.tagName isEqualToString:@"textarea"]) {
[self insertElementForToken:token];
_ignoreNextTokenIfLineFeed = YES;
_tokenizer.state = HTMLRCDATATokenizerState;
_framesetOkFlag = NO;
[self switchInsertionMode:HTMLTextInsertionMode];
} else if ([token.tagName isEqualToString:@"xmp"]) {
if ([self elementInButtonScopeWithTagName:@"p"]) {
[self closePElement];
}
[self reconstructTheActiveFormattingElements];
_framesetOkFlag = NO;
[self followGenericRawTextElementParsingAlgorithmForToken:token];
} else if ([token.tagName isEqualToString:@"iframe"]) {
_framesetOkFlag = NO;
[self followGenericRawTextElementParsingAlgorithmForToken:token];
} else if ([token.tagName isEqualToString:@"noembed"] || [token.tagName isEqualToString:@"noscript"]) {
[self followGenericRawTextElementParsingAlgorithmForToken:token];
} else if ([token.tagName isEqualToString:@"select"]) {
[self reconstructTheActiveFormattingElements];
[self insertElementForToken:token];
_framesetOkFlag = NO;
switch (_insertionMode) {
case HTMLInTableInsertionMode:
case HTMLInCaptionInsertionMode:
case HTMLInTableBodyInsertionMode:
case HTMLInRowInsertionMode:
case HTMLInCellInsertionMode:
[self switchInsertionMode:HTMLInSelectInTableInsertionMode];
break;
default:
[self switchInsertionMode:HTMLInSelectInsertionMode];
break;
}
} else if (StringIsEqualToAnyOf(token.tagName, @"optgroup", @"option")) {
if ([self.currentNode.tagName isEqualToString:@"option"]) {
[_stackOfOpenElements removeLastObject];
}
[self reconstructTheActiveFormattingElements];
[self insertElementForToken:token];
} else if ([token.tagName isEqualToString:@"menuitem"]) {
if ([self.currentNode.tagName isEqualToString:@"menuitem"]) {
[_stackOfOpenElements removeObject:self.currentNode];
}
// SPEC: Missing as of 2016-Jul-03 but tests and nearby commentary suggest its presence in order to act like <option>.
[self reconstructTheActiveFormattingElements];
[self insertElementForToken:token];
} else if (StringIsEqualToAnyOf(token.tagName, @"rp", @"rt")) {
if ([self elementInScopeWithTagName:@"ruby"]) {
[self generateImpliedEndTags];
if (![self.currentNode.tagName isEqualToString:@"ruby"]) {
[self addParseError:@"Start tag named %@ outside of ruby in <body>", token.tagName];
}
}
[self insertElementForToken:token];
} else if ([token.tagName isEqualToString:@"math"]) {
[self reconstructTheActiveFormattingElements];
AdjustMathMLAttributesForToken(token);
AdjustForeignAttributesForToken(token);
HTMLElement *element = [self createElementForToken:token inNamespace:HTMLNamespaceMathML];
[self insertElement:element];
if (token.selfClosingFlag) {
[_stackOfOpenElements removeLastObject];
}
} else if ([token.tagName isEqualToString:@"svg"]) {
[self reconstructTheActiveFormattingElements];
AdjustSVGAttributesForToken(token);
AdjustForeignAttributesForToken(token);
HTMLElement *element = [self createElementForToken:token inNamespace:HTMLNamespaceSVG];
[self insertElement:element];
if (token.selfClosingFlag) {
[_stackOfOpenElements removeLastObject];
}
} else if (StringIsEqualToAnyOf(token.tagName, @"caption", @"col", @"colgroup", @"frame", @"head", @"tbody", @"td", @"tfoot", @"th", @"thead", @"tr")) {
[self addParseError:@"Start tag named %@ ignored in <body>", token.tagName];
} else {
[self reconstructTheActiveFormattingElements];
[self insertElementForToken:token];
}
}
- (void)inBodyInsertionModeHandleEOFToken:(HTMLEOFToken *)token
{
for (HTMLElement *node in _stackOfOpenElements) {
if (!StringIsEqualToAnyOf(node.tagName, @"dd", @"dt", @"li", @"p", @"tbody", @"td", @"tfoot", @"th", @"thead", @"tr", @"body", @"html")) {
[self addParseError:@"Unclosed %@ element in <body> at end of file", node.tagName];
break;
}
}
[self stopParsing];
}
- (void)inBodyInsertionModeHandleEndTagToken:(HTMLEndTagToken *)token
{
if (StringIsEqualToAnyOf(token.tagName, @"body", @"html")) {
if (![self elementInScopeWithTagName:@"body"]) {
[self addParseError:@"End tag named %@ without body in scope in <body>", token.tagName];
return;
}
for (HTMLElement *element in _stackOfOpenElements.reverseObjectEnumerator) {
if (!StringIsEqualToAnyOf(element.tagName, @"dd", @"dt", @"li", @"optgroup", @"option", @"p", @"rp", @"rt", @"tbody", @"td", @"tfoot", @"th", @"thead", @"tr", @"body", @"html")) {
[self addParseError:@"Misplaced %@ element in <body>", element.tagName];
break;