From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 dom/xslt/xml/txXMLUtils.cpp | 181 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 181 insertions(+)
 create mode 100644 dom/xslt/xml/txXMLUtils.cpp

(limited to 'dom/xslt/xml/txXMLUtils.cpp')

diff --git a/dom/xslt/xml/txXMLUtils.cpp b/dom/xslt/xml/txXMLUtils.cpp
new file mode 100644
index 000000000..58687568d
--- /dev/null
+++ b/dom/xslt/xml/txXMLUtils.cpp
@@ -0,0 +1,181 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * XML utility classes
+ */
+
+#include "txXMLUtils.h"
+#include "nsString.h"
+#include "nsReadableUtils.h"
+#include "nsGkAtoms.h"
+#include "txStringUtils.h"
+#include "txNamespaceMap.h"
+#include "txXPathTreeWalker.h"
+#include "nsContentUtils.h"
+
+//------------------------------/
+//- Implementation of XMLUtils -/
+//------------------------------/
+
+// static
+nsresult
+XMLUtils::splitExpatName(const char16_t *aExpatName, nsIAtom **aPrefix,
+                         nsIAtom **aLocalName, int32_t* aNameSpaceID)
+{
+    /**
+     *  Expat can send the following:
+     *    localName
+     *    namespaceURI<separator>localName
+     *    namespaceURI<separator>localName<separator>prefix
+     */
+
+    const char16_t *uriEnd = nullptr;
+    const char16_t *nameEnd = nullptr;
+    const char16_t *pos;
+    for (pos = aExpatName; *pos; ++pos) {
+        if (*pos == kExpatSeparatorChar) {
+            if (uriEnd) {
+                nameEnd = pos;
+            }
+            else {
+                uriEnd = pos;
+            }
+        }
+    }
+
+    const char16_t *nameStart;
+    if (uriEnd) {
+        *aNameSpaceID =
+            txNamespaceManager::getNamespaceID(nsDependentSubstring(aExpatName,
+                                                                    uriEnd));
+        if (*aNameSpaceID == kNameSpaceID_Unknown) {
+            return NS_ERROR_FAILURE;
+        }
+
+        nameStart = (uriEnd + 1);
+        if (nameEnd)  {
+            const char16_t *prefixStart = nameEnd + 1;
+            *aPrefix = NS_Atomize(Substring(prefixStart, pos)).take();
+            if (!*aPrefix) {
+                return NS_ERROR_OUT_OF_MEMORY;
+            }
+        }
+        else {
+            nameEnd = pos;
+            *aPrefix = nullptr;
+        }
+    }
+    else {
+        *aNameSpaceID = kNameSpaceID_None;
+        nameStart = aExpatName;
+        nameEnd = pos;
+        *aPrefix = nullptr;
+    }
+
+    *aLocalName = NS_Atomize(Substring(nameStart, nameEnd)).take();
+
+    return *aLocalName ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
+}
+
+nsresult
+XMLUtils::splitQName(const nsAString& aName, nsIAtom** aPrefix,
+                     nsIAtom** aLocalName)
+{
+    const nsAFlatString& qName = PromiseFlatString(aName);
+    const char16_t* colon;
+    bool valid = XMLUtils::isValidQName(qName, &colon);
+    if (!valid) {
+        return NS_ERROR_FAILURE;
+    }
+
+    if (colon) {
+        const char16_t *end;
+        qName.EndReading(end);
+
+        *aPrefix = NS_Atomize(Substring(qName.get(), colon)).take();
+        *aLocalName = NS_Atomize(Substring(colon + 1, end)).take();
+    }
+    else {
+        *aPrefix = nullptr;
+        *aLocalName = NS_Atomize(aName).take();
+    }
+
+    return NS_OK;
+}
+
+/**
+ * Returns true if the given string has only whitespace characters
+ */
+bool XMLUtils::isWhitespace(const nsAFlatString& aText)
+{
+    nsAFlatString::const_char_iterator start, end;
+    aText.BeginReading(start);
+    aText.EndReading(end);
+    for ( ; start != end; ++start) {
+        if (!isWhitespace(*start)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+/**
+ * Normalizes the value of a XML processing instruction
+**/
+void XMLUtils::normalizePIValue(nsAString& piValue)
+{
+    nsAutoString origValue(piValue);
+    uint32_t origLength = origValue.Length();
+    uint32_t conversionLoop = 0;
+    char16_t prevCh = 0;
+    piValue.Truncate();
+
+    while (conversionLoop < origLength) {
+        char16_t ch = origValue.CharAt(conversionLoop);
+        switch (ch) {
+            case '>':
+            {
+                if (prevCh == '?') {
+                    piValue.Append(char16_t(' '));
+                }
+                break;
+            }
+            default:
+            {
+                break;
+            }
+        }
+        piValue.Append(ch);
+        prevCh = ch;
+        ++conversionLoop;
+    }
+}
+
+//static
+bool XMLUtils::isValidQName(const nsAFlatString& aQName,
+                            const char16_t** aColon)
+{
+  return NS_SUCCEEDED(nsContentUtils::CheckQName(aQName, true, aColon));
+}
+
+//static
+bool XMLUtils::getXMLSpacePreserve(const txXPathNode& aNode)
+{
+    nsAutoString value;
+    txXPathTreeWalker walker(aNode);
+    do {
+        if (walker.getAttr(nsGkAtoms::space, kNameSpaceID_XML, value)) {
+            if (TX_StringEqualsAtom(value, nsGkAtoms::preserve)) {
+                return true;
+            }
+            if (TX_StringEqualsAtom(value, nsGkAtoms::_default)) {
+                return false;
+            }
+        }
+    } while (walker.moveToParent());
+
+    return false;
+}
-- 
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