From 2aa4a82499d4becd2284cdb482213d541b8804dd Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 28 Apr 2024 16:29:10 +0200
Subject: Adding upstream version 86.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 dom/xslt/xml/txXMLUtils.cpp | 164 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 164 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 0000000000..0688939ccb
--- /dev/null
+++ b/dom/xslt/xml/txXMLUtils.cpp
@@ -0,0 +1,164 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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, nsAtom** aPrefix,
+                                  nsAtom** 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, nsAtom** aPrefix,
+                              nsAtom** aLocalName) {
+  const char16_t* colon;
+  bool valid = XMLUtils::isValidQName(aName, &colon);
+  if (!valid) {
+    return NS_ERROR_FAILURE;
+  }
+
+  if (colon) {
+    const char16_t* end;
+    aName.EndReading(end);
+
+    *aPrefix = NS_Atomize(Substring(aName.BeginReading(), 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 nsAString& aText) {
+  nsString::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 nsAString& 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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