/
HtmlTreeBuilderState.java
1803 lines (1753 loc) · 77.6 KB
/
HtmlTreeBuilderState.java
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package org.jsoup.parser;
import org.jsoup.internal.StringUtil;
import org.jsoup.nodes.Attribute;
import org.jsoup.nodes.Attributes;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.DocumentType;
import org.jsoup.nodes.Element;
import org.jsoup.nodes.Node;
import java.util.ArrayList;
import static org.jsoup.internal.StringUtil.inSorted;
import static org.jsoup.parser.HtmlTreeBuilderState.Constants.*;
/**
* The Tree Builder's current state. Each state embodies the processing for the state, and transitions to other states.
*/
enum HtmlTreeBuilderState {
Initial {
boolean process(Token t, HtmlTreeBuilder tb) {
if (isWhitespace(t)) {
return true; // ignore whitespace until we get the first content
} else if (t.isComment()) {
tb.insert(t.asComment());
} else if (t.isDoctype()) {
// todo: parse error check on expected doctypes
// todo: quirk state check on doctype ids
Token.Doctype d = t.asDoctype();
DocumentType doctype = new DocumentType(
tb.settings.normalizeTag(d.getName()), d.getPublicIdentifier(), d.getSystemIdentifier());
doctype.setPubSysKey(d.getPubSysKey());
tb.getDocument().appendChild(doctype);
tb.onNodeInserted(doctype, t);
if (d.isForceQuirks())
tb.getDocument().quirksMode(Document.QuirksMode.quirks);
tb.transition(BeforeHtml);
} else {
// todo: check not iframe srcdoc
tb.transition(BeforeHtml);
return tb.process(t); // re-process token
}
return true;
}
},
BeforeHtml {
boolean process(Token t, HtmlTreeBuilder tb) {
if (t.isDoctype()) {
tb.error(this);
return false;
} else if (t.isComment()) {
tb.insert(t.asComment());
} else if (isWhitespace(t)) {
tb.insert(t.asCharacter()); // out of spec - include whitespace
} else if (t.isStartTag() && t.asStartTag().normalName().equals("html")) {
tb.insert(t.asStartTag());
tb.transition(BeforeHead);
} else if (t.isEndTag() && (inSorted(t.asEndTag().normalName(), BeforeHtmlToHead))) {
return anythingElse(t, tb);
} else if (t.isEndTag()) {
tb.error(this);
return false;
} else {
return anythingElse(t, tb);
}
return true;
}
private boolean anythingElse(Token t, HtmlTreeBuilder tb) {
tb.insertStartTag("html");
tb.transition(BeforeHead);
return tb.process(t);
}
},
BeforeHead {
boolean process(Token t, HtmlTreeBuilder tb) {
if (isWhitespace(t)) {
tb.insert(t.asCharacter()); // out of spec - include whitespace
} else if (t.isComment()) {
tb.insert(t.asComment());
} else if (t.isDoctype()) {
tb.error(this);
return false;
} else if (t.isStartTag() && t.asStartTag().normalName().equals("html")) {
return InBody.process(t, tb); // does not transition
} else if (t.isStartTag() && t.asStartTag().normalName().equals("head")) {
Element head = tb.insert(t.asStartTag());
tb.setHeadElement(head);
tb.transition(InHead);
} else if (t.isEndTag() && (inSorted(t.asEndTag().normalName(), BeforeHtmlToHead))) {
tb.processStartTag("head");
return tb.process(t);
} else if (t.isEndTag()) {
tb.error(this);
return false;
} else {
tb.processStartTag("head");
return tb.process(t);
}
return true;
}
},
InHead {
boolean process(Token t, HtmlTreeBuilder tb) {
if (isWhitespace(t)) {
tb.insert(t.asCharacter()); // out of spec - include whitespace
return true;
}
switch (t.type) {
case Comment:
tb.insert(t.asComment());
break;
case Doctype:
tb.error(this);
return false;
case StartTag:
Token.StartTag start = t.asStartTag();
String name = start.normalName();
if (name.equals("html")) {
return InBody.process(t, tb);
} else if (inSorted(name, InHeadEmpty)) {
Element el = tb.insertEmpty(start);
// jsoup special: update base the first time it is seen
if (name.equals("base") && el.hasAttr("href"))
tb.maybeSetBaseUri(el);
} else if (name.equals("meta")) {
tb.insertEmpty(start);
// todo: charset switches
} else if (name.equals("title")) {
handleRcData(start, tb);
} else if (inSorted(name, InHeadRaw)) {
handleRawtext(start, tb);
} else if (name.equals("noscript")) {
// else if noscript && scripting flag = true: rawtext (jsoup doesn't run script, to handle as noscript)
tb.insert(start);
tb.transition(InHeadNoscript);
} else if (name.equals("script")) {
// skips some script rules as won't execute them
tb.tokeniser.transition(TokeniserState.ScriptData);
tb.markInsertionMode();
tb.transition(Text);
tb.insert(start);
} else if (name.equals("head")) {
tb.error(this);
return false;
} else if (name.equals("template")) {
tb.insert(start);
tb.insertMarkerToFormattingElements();
tb.framesetOk(false);
tb.transition(InTemplate);
tb.pushTemplateMode(InTemplate);
} else {
return anythingElse(t, tb);
}
break;
case EndTag:
Token.EndTag end = t.asEndTag();
name = end.normalName();
if (name.equals("head")) {
tb.pop();
tb.transition(AfterHead);
} else if (inSorted(name, Constants.InHeadEnd)) {
return anythingElse(t, tb);
} else if (name.equals("template")) {
if (!tb.onStack(name)) {
tb.error(this);
} else {
tb.generateImpliedEndTags(true);
if (!name.equals(tb.currentElement().normalName())) tb.error(this);
tb.popStackToClose(name);
tb.clearFormattingElementsToLastMarker();
tb.popTemplateMode();
tb.resetInsertionMode();
}
}
else {
tb.error(this);
return false;
}
break;
default:
return anythingElse(t, tb);
}
return true;
}
private boolean anythingElse(Token t, TreeBuilder tb) {
tb.processEndTag("head");
return tb.process(t);
}
},
InHeadNoscript {
boolean process(Token t, HtmlTreeBuilder tb) {
if (t.isDoctype()) {
tb.error(this);
} else if (t.isStartTag() && t.asStartTag().normalName().equals("html")) {
return tb.process(t, InBody);
} else if (t.isEndTag() && t.asEndTag().normalName().equals("noscript")) {
tb.pop();
tb.transition(InHead);
} else if (isWhitespace(t) || t.isComment() || (t.isStartTag() && inSorted(t.asStartTag().normalName(),
InHeadNoScriptHead))) {
return tb.process(t, InHead);
} else if (t.isEndTag() && t.asEndTag().normalName().equals("br")) {
return anythingElse(t, tb);
} else if ((t.isStartTag() && inSorted(t.asStartTag().normalName(), InHeadNoscriptIgnore)) || t.isEndTag()) {
tb.error(this);
return false;
} else {
return anythingElse(t, tb);
}
return true;
}
private boolean anythingElse(Token t, HtmlTreeBuilder tb) {
// note that this deviates from spec, which is to pop out of noscript and reprocess in head:
// https://html.spec.whatwg.org/multipage/parsing.html#parsing-main-inheadnoscript
// allows content to be inserted as data
tb.error(this);
tb.insert(new Token.Character().data(t.toString()));
return true;
}
},
AfterHead {
boolean process(Token t, HtmlTreeBuilder tb) {
if (isWhitespace(t)) {
tb.insert(t.asCharacter());
} else if (t.isComment()) {
tb.insert(t.asComment());
} else if (t.isDoctype()) {
tb.error(this);
} else if (t.isStartTag()) {
Token.StartTag startTag = t.asStartTag();
String name = startTag.normalName();
if (name.equals("html")) {
return tb.process(t, InBody);
} else if (name.equals("body")) {
tb.insert(startTag);
tb.framesetOk(false);
tb.transition(InBody);
} else if (name.equals("frameset")) {
tb.insert(startTag);
tb.transition(InFrameset);
} else if (inSorted(name, InBodyStartToHead)) {
tb.error(this);
Element head = tb.getHeadElement();
tb.push(head);
tb.process(t, InHead);
tb.removeFromStack(head);
} else if (name.equals("head")) {
tb.error(this);
return false;
} else {
anythingElse(t, tb);
}
} else if (t.isEndTag()) {
String name = t.asEndTag().normalName();
if (inSorted(name, AfterHeadBody)) {
anythingElse(t, tb);
} else if (name.equals("template")) {
tb.process(t, InHead);
}
else {
tb.error(this);
return false;
}
} else {
anythingElse(t, tb);
}
return true;
}
private boolean anythingElse(Token t, HtmlTreeBuilder tb) {
tb.processStartTag("body");
tb.framesetOk(true);
return tb.process(t);
}
},
InBody {
boolean process(Token t, HtmlTreeBuilder tb) {
switch (t.type) {
case Character: {
Token.Character c = t.asCharacter();
if (c.getData().equals(nullString)) {
// todo confirm that check
tb.error(this);
return false;
} else if (tb.framesetOk() && isWhitespace(c)) { // don't check if whitespace if frames already closed
tb.reconstructFormattingElements();
tb.insert(c);
} else {
tb.reconstructFormattingElements();
tb.insert(c);
tb.framesetOk(false);
}
break;
}
case Comment: {
tb.insert(t.asComment());
break;
}
case Doctype: {
tb.error(this);
return false;
}
case StartTag:
return inBodyStartTag(t, tb);
case EndTag:
return inBodyEndTag(t, tb);
case EOF:
if (tb.templateModeSize() > 0)
return tb.process(t, InTemplate);
// todo: error if stack contains something not dd, dt, li, p, tbody, td, tfoot, th, thead, tr, body, html
// stop parsing
break;
}
return true;
}
private boolean inBodyStartTag(Token t, HtmlTreeBuilder tb) {
final Token.StartTag startTag = t.asStartTag();
final String name = startTag.normalName();
final ArrayList<Element> stack;
Element el;
switch (name) {
case "a":
if (tb.getActiveFormattingElement("a") != null) {
tb.error(this);
tb.processEndTag("a");
// still on stack?
Element remainingA = tb.getFromStack("a");
if (remainingA != null) {
tb.removeFromActiveFormattingElements(remainingA);
tb.removeFromStack(remainingA);
}
}
tb.reconstructFormattingElements();
el = tb.insert(startTag);
tb.pushActiveFormattingElements(el);
break;
case "span":
// same as final else, but short circuits lots of checks
tb.reconstructFormattingElements();
tb.insert(startTag);
break;
case "li":
tb.framesetOk(false);
stack = tb.getStack();
for (int i = stack.size() - 1; i > 0; i--) {
el = stack.get(i);
if (el.normalName().equals("li")) {
tb.processEndTag("li");
break;
}
if (tb.isSpecial(el) && !inSorted(el.normalName(), Constants.InBodyStartLiBreakers))
break;
}
if (tb.inButtonScope("p")) {
tb.processEndTag("p");
}
tb.insert(startTag);
break;
case "html":
tb.error(this);
if (tb.onStack("template")) return false; // ignore
// otherwise, merge attributes onto real html (if present)
stack = tb.getStack();
if (stack.size() > 0) {
Element html = tb.getStack().get(0);
if (startTag.hasAttributes()) {
for (Attribute attribute : startTag.attributes) {
if (!html.hasAttr(attribute.getKey()))
html.attributes().put(attribute);
}
}
}
break;
case "body":
tb.error(this);
stack = tb.getStack();
if (stack.size() == 1 || (stack.size() > 2 && !stack.get(1).normalName().equals("body")) || tb.onStack("template")) {
// only in fragment case
return false; // ignore
} else {
tb.framesetOk(false);
Element body = stack.get(1);
if (startTag.hasAttributes()) {
for (Attribute attribute : startTag.attributes) {
if (!body.hasAttr(attribute.getKey()))
body.attributes().put(attribute);
}
}
}
break;
case "frameset":
tb.error(this);
stack = tb.getStack();
if (stack.size() == 1 || (stack.size() > 2 && !stack.get(1).normalName().equals("body"))) {
// only in fragment case
return false; // ignore
} else if (!tb.framesetOk()) {
return false; // ignore frameset
} else {
Element second = stack.get(1);
if (second.parent() != null)
second.remove();
// pop up to html element
while (stack.size() > 1)
stack.remove(stack.size() - 1);
tb.insert(startTag);
tb.transition(InFrameset);
}
break;
case "form":
if (tb.getFormElement() != null && !tb.onStack("template")) {
tb.error(this);
return false;
}
if (tb.inButtonScope("p")) {
tb.closeElement("p");
}
tb.insertForm(startTag, true, true); // won't associate to any template
break;
case "plaintext":
if (tb.inButtonScope("p")) {
tb.processEndTag("p");
}
tb.insert(startTag);
tb.tokeniser.transition(TokeniserState.PLAINTEXT); // once in, never gets out
break;
case "button":
if (tb.inButtonScope("button")) {
// close and reprocess
tb.error(this);
tb.processEndTag("button");
tb.process(startTag);
} else {
tb.reconstructFormattingElements();
tb.insert(startTag);
tb.framesetOk(false);
}
break;
case "nobr":
tb.reconstructFormattingElements();
if (tb.inScope("nobr")) {
tb.error(this);
tb.processEndTag("nobr");
tb.reconstructFormattingElements();
}
el = tb.insert(startTag);
tb.pushActiveFormattingElements(el);
break;
case "table":
if (tb.getDocument().quirksMode() != Document.QuirksMode.quirks && tb.inButtonScope("p")) {
tb.processEndTag("p");
}
tb.insert(startTag);
tb.framesetOk(false);
tb.transition(InTable);
break;
case "input":
tb.reconstructFormattingElements();
el = tb.insertEmpty(startTag);
if (!el.attr("type").equalsIgnoreCase("hidden"))
tb.framesetOk(false);
break;
case "hr":
if (tb.inButtonScope("p")) {
tb.processEndTag("p");
}
tb.insertEmpty(startTag);
tb.framesetOk(false);
break;
case "image":
if (tb.getFromStack("svg") == null)
return tb.process(startTag.name("img")); // change <image> to <img>, unless in svg
else
tb.insert(startTag);
break;
case "isindex":
// how much do we care about the early 90s?
tb.error(this);
if (tb.getFormElement() != null)
return false;
tb.processStartTag("form");
if (startTag.hasAttribute("action")) {
Element form = tb.getFormElement();
if (form != null && startTag.hasAttribute("action")) {
String action = startTag.attributes.get("action");
form.attributes().put("action", action); // always LC, so don't need to scan up for ownerdoc
}
}
tb.processStartTag("hr");
tb.processStartTag("label");
// hope you like english.
String prompt = startTag.hasAttribute("prompt") ?
startTag.attributes.get("prompt") :
"This is a searchable index. Enter search keywords: ";
tb.process(new Token.Character().data(prompt));
// input
Attributes inputAttribs = new Attributes();
if (startTag.hasAttributes()) {
for (Attribute attr : startTag.attributes) {
if (!inSorted(attr.getKey(), Constants.InBodyStartInputAttribs))
inputAttribs.put(attr);
}
}
inputAttribs.put("name", "isindex");
tb.processStartTag("input", inputAttribs);
tb.processEndTag("label");
tb.processStartTag("hr");
tb.processEndTag("form");
break;
case "textarea":
tb.insert(startTag);
if (!startTag.isSelfClosing()) {
tb.tokeniser.transition(TokeniserState.Rcdata);
tb.markInsertionMode();
tb.framesetOk(false);
tb.transition(Text);
}
break;
case "xmp":
if (tb.inButtonScope("p")) {
tb.processEndTag("p");
}
tb.reconstructFormattingElements();
tb.framesetOk(false);
handleRawtext(startTag, tb);
break;
case "iframe":
tb.framesetOk(false);
handleRawtext(startTag, tb);
break;
case "noembed":
// also handle noscript if script enabled
handleRawtext(startTag, tb);
break;
case "select":
tb.reconstructFormattingElements();
tb.insert(startTag);
tb.framesetOk(false);
if (startTag.selfClosing) break; // don't change states if not added to the stack
HtmlTreeBuilderState state = tb.state();
if (state.equals(InTable) || state.equals(InCaption) || state.equals(InTableBody) || state.equals(InRow) || state.equals(InCell))
tb.transition(InSelectInTable);
else
tb.transition(InSelect);
break;
case "math":
tb.reconstructFormattingElements();
// todo: handle A start tag whose tag name is "math" (i.e. foreign, mathml)
tb.insert(startTag);
break;
case "svg":
tb.reconstructFormattingElements();
// todo: handle A start tag whose tag name is "svg" (xlink, svg)
tb.insert(startTag);
break;
// static final String[] Headings = new String[]{"h1", "h2", "h3", "h4", "h5", "h6"};
case "h1":
case "h2":
case "h3":
case "h4":
case "h5":
case "h6":
if (tb.inButtonScope("p")) {
tb.processEndTag("p");
}
if (inSorted(tb.currentElement().normalName(), Constants.Headings)) {
tb.error(this);
tb.pop();
}
tb.insert(startTag);
break;
// static final String[] InBodyStartPreListing = new String[]{"listing", "pre"};
case "pre":
case "listing":
if (tb.inButtonScope("p")) {
tb.processEndTag("p");
}
tb.insert(startTag);
tb.reader.matchConsume("\n"); // ignore LF if next token
tb.framesetOk(false);
break;
// static final String[] DdDt = new String[]{"dd", "dt"};
case "dd":
case "dt":
tb.framesetOk(false);
stack = tb.getStack();
final int bottom = stack.size() - 1;
final int upper = bottom >= MaxStackScan ? bottom - MaxStackScan : 0;
for (int i = bottom; i >= upper; i--) {
el = stack.get(i);
if (inSorted(el.normalName(), Constants.DdDt)) {
tb.processEndTag(el.normalName());
break;
}
if (tb.isSpecial(el) && !inSorted(el.normalName(), Constants.InBodyStartLiBreakers))
break;
}
if (tb.inButtonScope("p")) {
tb.processEndTag("p");
}
tb.insert(startTag);
break;
// static final String[] InBodyStartOptions = new String[]{"optgroup", "option"};
case "optgroup":
case "option":
if (tb.currentElementIs("option"))
tb.processEndTag("option");
tb.reconstructFormattingElements();
tb.insert(startTag);
break;
// static final String[] InBodyStartRuby = new String[]{"rp", "rt"};
case "rp":
case "rt":
if (tb.inScope("ruby")) {
tb.generateImpliedEndTags();
if (!tb.currentElementIs("ruby")) {
tb.error(this);
tb.popStackToBefore("ruby"); // i.e. close up to but not include name
}
tb.insert(startTag);
}
// todo - is this right? drops rp, rt if ruby not in scope?
break;
// InBodyStartEmptyFormatters:
case "area":
case "br":
case "embed":
case "img":
case "keygen":
case "wbr":
tb.reconstructFormattingElements();
tb.insertEmpty(startTag);
tb.framesetOk(false);
break;
// Formatters:
case "b":
case "big":
case "code":
case "em":
case "font":
case "i":
case "s":
case "small":
case "strike":
case "strong":
case "tt":
case "u":
tb.reconstructFormattingElements();
el = tb.insert(startTag);
tb.pushActiveFormattingElements(el);
break;
default:
// todo - bring scan groups in if desired
if (!Tag.isKnownTag(name)) { // no special rules for custom tags
tb.insert(startTag);
} else if (inSorted(name, Constants.InBodyStartPClosers)) {
if (tb.inButtonScope("p")) {
tb.processEndTag("p");
}
tb.insert(startTag);
} else if (inSorted(name, Constants.InBodyStartToHead)) {
return tb.process(t, InHead);
} else if (inSorted(name, Constants.InBodyStartApplets)) {
tb.reconstructFormattingElements();
tb.insert(startTag);
tb.insertMarkerToFormattingElements();
tb.framesetOk(false);
} else if (inSorted(name, Constants.InBodyStartMedia)) {
tb.insertEmpty(startTag);
} else if (inSorted(name, Constants.InBodyStartDrop)) {
tb.error(this);
return false;
} else {
tb.reconstructFormattingElements();
tb.insert(startTag);
}
}
return true;
}
private static final int MaxStackScan = 24; // used for DD / DT scan, prevents runaway
private boolean inBodyEndTag(Token t, HtmlTreeBuilder tb) {
final Token.EndTag endTag = t.asEndTag();
final String name = endTag.normalName();
switch (name) {
case "template":
tb.process(t, InHead);
break;
case "sarcasm": // *sigh*
case "span":
// same as final fall through, but saves short circuit
return anyOtherEndTag(t, tb);
case "li":
if (!tb.inListItemScope(name)) {
tb.error(this);
return false;
} else {
tb.generateImpliedEndTags(name);
if (!tb.currentElementIs(name))
tb.error(this);
tb.popStackToClose(name);
}
break;
case "body":
if (!tb.inScope("body")) {
tb.error(this);
return false;
} else {
// todo: error if stack contains something not dd, dt, li, optgroup, option, p, rp, rt, tbody, td, tfoot, th, thead, tr, body, html
anyOtherEndTag(t, tb);
tb.transition(AfterBody);
}
break;
case "html":
boolean notIgnored = tb.processEndTag("body");
if (notIgnored)
return tb.process(endTag);
break;
case "form":
if (!tb.onStack("template")) {
Element currentForm = tb.getFormElement();
tb.setFormElement(null);
if (currentForm == null || !tb.inScope(name)) {
tb.error(this);
return false;
}
tb.generateImpliedEndTags();
if (!tb.currentElementIs(name))
tb.error(this);
// remove currentForm from stack. will shift anything under up.
tb.removeFromStack(currentForm);
} else { // template on stack
if (!tb.inScope(name)) {
tb.error(this);
return false;
}
tb.generateImpliedEndTags();
if (!tb.currentElementIs(name)) tb.error(this);
tb.popStackToClose(name);
}
break;
case "p":
if (!tb.inButtonScope(name)) {
tb.error(this);
tb.processStartTag(name); // if no p to close, creates an empty <p></p>
return tb.process(endTag);
} else {
tb.generateImpliedEndTags(name);
if (!tb.currentElementIs(name))
tb.error(this);
tb.popStackToClose(name);
}
break;
case "dd":
case "dt":
if (!tb.inScope(name)) {
tb.error(this);
return false;
} else {
tb.generateImpliedEndTags(name);
if (!tb.currentElementIs(name))
tb.error(this);
tb.popStackToClose(name);
}
break;
case "h1":
case "h2":
case "h3":
case "h4":
case "h5":
case "h6":
if (!tb.inScope(Constants.Headings)) {
tb.error(this);
return false;
} else {
tb.generateImpliedEndTags(name);
if (!tb.currentElementIs(name))
tb.error(this);
tb.popStackToClose(Constants.Headings);
}
break;
case "br":
tb.error(this);
tb.processStartTag("br");
return false;
default:
// todo - move rest to switch if desired
if (inSorted(name, Constants.InBodyEndAdoptionFormatters)) {
return inBodyEndTagAdoption(t, tb);
} else if (inSorted(name, Constants.InBodyEndClosers)) {
if (!tb.inScope(name)) {
// nothing to close
tb.error(this);
return false;
} else {
tb.generateImpliedEndTags();
if (!tb.currentElementIs(name))
tb.error(this);
tb.popStackToClose(name);
}
} else if (inSorted(name, Constants.InBodyStartApplets)) {
if (!tb.inScope("name")) {
if (!tb.inScope(name)) {
tb.error(this);
return false;
}
tb.generateImpliedEndTags();
if (!tb.currentElementIs(name))
tb.error(this);
tb.popStackToClose(name);
tb.clearFormattingElementsToLastMarker();
}
} else {
return anyOtherEndTag(t, tb);
}
}
return true;
}
boolean anyOtherEndTag(Token t, HtmlTreeBuilder tb) {
final String name = t.asEndTag().normalName; // case insensitive search - goal is to preserve output case, not for the parse to be case sensitive
final ArrayList<Element> stack = tb.getStack();
// deviate from spec slightly to speed when super deeply nested
Element elFromStack = tb.getFromStack(name);
if (elFromStack == null) {
tb.error(this);
return false;
}
for (int pos = stack.size() - 1; pos >= 0; pos--) {
Element node = stack.get(pos);
if (node.normalName().equals(name)) {
tb.generateImpliedEndTags(name);
if (!tb.currentElementIs(name))
tb.error(this);
tb.popStackToClose(name);
break;
} else {
if (tb.isSpecial(node)) {
tb.error(this);
return false;
}
}
}
return true;
}
// Adoption Agency Algorithm.
private boolean inBodyEndTagAdoption(Token t, HtmlTreeBuilder tb) {
final Token.EndTag endTag = t.asEndTag();
final String name = endTag.normalName();
final ArrayList<Element> stack = tb.getStack();
Element el;
for (int i = 0; i < 8; i++) {
Element formatEl = tb.getActiveFormattingElement(name);
if (formatEl == null)
return anyOtherEndTag(t, tb);
else if (!tb.onStack(formatEl)) {
tb.error(this);
tb.removeFromActiveFormattingElements(formatEl);
return true;
} else if (!tb.inScope(formatEl.normalName())) {
tb.error(this);
return false;
} else if (tb.currentElement() != formatEl)
tb.error(this);
Element furthestBlock = null;
Element commonAncestor = null;
boolean seenFormattingElement = false;
// the spec doesn't limit to < 64, but in degenerate cases (9000+ stack depth) this prevents run-aways
final int stackSize = stack.size();
int bookmark = -1;
for (int si = 1; si < stackSize && si < 64; si++) {
// TODO: this no longer matches the current spec at https://html.spec.whatwg.org/#adoption-agency-algorithm and should be updated
el = stack.get(si);
if (el == formatEl) {
commonAncestor = stack.get(si - 1);
seenFormattingElement = true;
// Let a bookmark note the position of the formatting element in the list of active formatting elements relative to the elements on either side of it in the list.
bookmark = tb.positionOfElement(el);
} else if (seenFormattingElement && tb.isSpecial(el)) {
furthestBlock = el;
break;
}
}
if (furthestBlock == null) {
tb.popStackToClose(formatEl.normalName());
tb.removeFromActiveFormattingElements(formatEl);
return true;
}
Element node = furthestBlock;
Element lastNode = furthestBlock;
for (int j = 0; j < 3; j++) {
if (tb.onStack(node))
node = tb.aboveOnStack(node);
if (!tb.isInActiveFormattingElements(node)) { // note no bookmark check
tb.removeFromStack(node);
continue;
} else if (node == formatEl)
break;
Element replacement = new Element(tb.tagFor(node.nodeName(), ParseSettings.preserveCase), tb.getBaseUri());
// case will follow the original node (so honours ParseSettings)
tb.replaceActiveFormattingElement(node, replacement);
tb.replaceOnStack(node, replacement);
node = replacement;
if (lastNode == furthestBlock) {
// move the aforementioned bookmark to be immediately after the new node in the list of active formatting elements.
// not getting how this bookmark both straddles the element above, but is inbetween here...
bookmark = tb.positionOfElement(node) + 1;
}
if (lastNode.parent() != null)
lastNode.remove();
node.appendChild(lastNode);
lastNode = node;
}
if (commonAncestor != null) { // safety check, but would be an error if null
if (inSorted(commonAncestor.normalName(), Constants.InBodyEndTableFosters)) {
if (lastNode.parent() != null)
lastNode.remove();
tb.insertInFosterParent(lastNode);
} else {
if (lastNode.parent() != null)
lastNode.remove();
commonAncestor.appendChild(lastNode);
}
}
Element adopter = new Element(formatEl.tag(), tb.getBaseUri());
adopter.attributes().addAll(formatEl.attributes());
adopter.appendChildren(furthestBlock.childNodes());
furthestBlock.appendChild(adopter);
tb.removeFromActiveFormattingElements(formatEl);
// insert the new element into the list of active formatting elements at the position of the aforementioned bookmark.
tb.pushWithBookmark(adopter, bookmark);
tb.removeFromStack(formatEl);
tb.insertOnStackAfter(furthestBlock, adopter);
}
return true;
}
},
Text {
// in script, style etc. normally treated as data tags
boolean process(Token t, HtmlTreeBuilder tb) {
if (t.isCharacter()) {
tb.insert(t.asCharacter());
} else if (t.isEOF()) {
tb.error(this);
// if current node is script: already started
tb.pop();
tb.transition(tb.originalState());
return tb.process(t);
} else if (t.isEndTag()) {
// if: An end tag whose tag name is "script" -- scripting nesting level, if evaluating scripts
tb.pop();
tb.transition(tb.originalState());
}
return true;
}
},
InTable {
boolean process(Token t, HtmlTreeBuilder tb) {
if (t.isCharacter() && inSorted(tb.currentElement().normalName(), InTableFoster)) {
tb.newPendingTableCharacters();
tb.markInsertionMode();
tb.transition(InTableText);
return tb.process(t);
} else if (t.isComment()) {
tb.insert(t.asComment());
return true;
} else if (t.isDoctype()) {
tb.error(this);
return false;
} else if (t.isStartTag()) {
Token.StartTag startTag = t.asStartTag();
String name = startTag.normalName();
if (name.equals("caption")) {
tb.clearStackToTableContext();
tb.insertMarkerToFormattingElements();
tb.insert(startTag);
tb.transition(InCaption);
} else if (name.equals("colgroup")) {