mirror of
https://github.com/classilla/tenfourfox.git
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182 lines
4.7 KiB
C++
182 lines
4.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* XML utility classes
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*/
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#include "txXMLUtils.h"
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#include "nsString.h"
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#include "nsReadableUtils.h"
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#include "nsGkAtoms.h"
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#include "txStringUtils.h"
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#include "txNamespaceMap.h"
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#include "txXPathTreeWalker.h"
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#include "nsContentUtils.h"
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//------------------------------/
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//- Implementation of XMLUtils -/
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//------------------------------/
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// static
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nsresult
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XMLUtils::splitExpatName(const char16_t *aExpatName, nsIAtom **aPrefix,
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nsIAtom **aLocalName, int32_t* aNameSpaceID)
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{
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/**
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* Expat can send the following:
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* localName
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* namespaceURI<separator>localName
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* namespaceURI<separator>localName<separator>prefix
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*/
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const char16_t *uriEnd = nullptr;
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const char16_t *nameEnd = nullptr;
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const char16_t *pos;
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for (pos = aExpatName; *pos; ++pos) {
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if (*pos == kExpatSeparatorChar) {
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if (uriEnd) {
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nameEnd = pos;
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}
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else {
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uriEnd = pos;
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}
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}
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}
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const char16_t *nameStart;
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if (uriEnd) {
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*aNameSpaceID =
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txNamespaceManager::getNamespaceID(nsDependentSubstring(aExpatName,
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uriEnd));
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if (*aNameSpaceID == kNameSpaceID_Unknown) {
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return NS_ERROR_FAILURE;
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}
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nameStart = (uriEnd + 1);
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if (nameEnd) {
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const char16_t *prefixStart = nameEnd + 1;
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*aPrefix = NS_NewAtom(Substring(prefixStart, pos)).take();
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if (!*aPrefix) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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else {
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nameEnd = pos;
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*aPrefix = nullptr;
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}
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}
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else {
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*aNameSpaceID = kNameSpaceID_None;
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nameStart = aExpatName;
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nameEnd = pos;
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*aPrefix = nullptr;
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}
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*aLocalName = NS_NewAtom(Substring(nameStart, nameEnd)).take();
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return *aLocalName ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
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}
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nsresult
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XMLUtils::splitQName(const nsAString& aName, nsIAtom** aPrefix,
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nsIAtom** aLocalName)
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{
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const nsAFlatString& qName = PromiseFlatString(aName);
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const char16_t* colon;
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bool valid = XMLUtils::isValidQName(qName, &colon);
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if (!valid) {
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return NS_ERROR_FAILURE;
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}
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if (colon) {
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const char16_t *end;
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qName.EndReading(end);
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*aPrefix = NS_NewAtom(Substring(qName.get(), colon)).take();
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*aLocalName = NS_NewAtom(Substring(colon + 1, end)).take();
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}
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else {
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*aPrefix = nullptr;
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*aLocalName = NS_NewAtom(aName).take();
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}
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return NS_OK;
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}
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/**
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* Returns true if the given string has only whitespace characters
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*/
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bool XMLUtils::isWhitespace(const nsAFlatString& aText)
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{
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nsAFlatString::const_char_iterator start, end;
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aText.BeginReading(start);
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aText.EndReading(end);
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for ( ; start != end; ++start) {
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if (!isWhitespace(*start)) {
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return false;
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}
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}
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return true;
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}
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/**
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* Normalizes the value of a XML processing instruction
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**/
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void XMLUtils::normalizePIValue(nsAString& piValue)
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{
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nsAutoString origValue(piValue);
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uint32_t origLength = origValue.Length();
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uint32_t conversionLoop = 0;
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char16_t prevCh = 0;
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piValue.Truncate();
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while (conversionLoop < origLength) {
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char16_t ch = origValue.CharAt(conversionLoop);
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switch (ch) {
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case '>':
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{
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if (prevCh == '?') {
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piValue.Append(char16_t(' '));
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}
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break;
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}
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default:
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{
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break;
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}
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}
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piValue.Append(ch);
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prevCh = ch;
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++conversionLoop;
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}
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}
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//static
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bool XMLUtils::isValidQName(const nsAFlatString& aQName,
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const char16_t** aColon)
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{
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return NS_SUCCEEDED(nsContentUtils::CheckQName(aQName, true, aColon));
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}
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//static
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bool XMLUtils::getXMLSpacePreserve(const txXPathNode& aNode)
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{
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nsAutoString value;
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txXPathTreeWalker walker(aNode);
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do {
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if (walker.getAttr(nsGkAtoms::space, kNameSpaceID_XML, value)) {
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if (TX_StringEqualsAtom(value, nsGkAtoms::preserve)) {
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return true;
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}
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if (TX_StringEqualsAtom(value, nsGkAtoms::_default)) {
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return false;
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}
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}
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} while (walker.moveToParent());
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return false;
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}
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