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// Copyright 2017 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fxcrt/xml/cxml_element.h"
#include "core/fxcrt/xml/cxml_content.h"
#include "core/fxcrt/xml/cxml_parser.h"
namespace {
void SplitQualifiedName(const ByteStringView& bsFullName,
ByteStringView* bsSpace,
ByteStringView* bsName) {
if (bsFullName.IsEmpty())
return;
auto iStart = bsFullName.Find(':');
if (iStart.has_value()) {
*bsSpace = bsFullName.Left(iStart.value());
*bsName = bsFullName.Right(bsFullName.GetLength() - (iStart.value() + 1));
} else {
*bsName = bsFullName;
}
}
} // namespace
// static
std::unique_ptr<CXML_Element> CXML_Element::Parse(const void* pBuffer,
size_t size) {
CXML_Parser parser;
if (!parser.Init(static_cast<const uint8_t*>(pBuffer), size))
return nullptr;
return parser.ParseElement(nullptr, false);
}
CXML_Element::CXML_Element(const CXML_Element* pParent,
const ByteStringView& qSpace,
const ByteStringView& tagname)
: m_pParent(pParent), m_QSpaceName(qSpace), m_TagName(tagname) {}
CXML_Element::~CXML_Element() {}
CXML_Element* CXML_Element::AsElement() {
return this;
}
const CXML_Element* CXML_Element::AsElement() const {
return this;
}
ByteString CXML_Element::GetTagName() const {
return m_TagName;
}
ByteString CXML_Element::GetNamespaceURI(const ByteString& qName) const {
const CXML_Element* pElement = this;
do {
const WideString* pwsSpace;
if (qName.IsEmpty())
pwsSpace = pElement->Lookup("", "xmlns");
else
pwsSpace = pElement->Lookup("xmlns", qName);
if (pwsSpace)
return pwsSpace->UTF8Encode();
pElement = pElement->GetParent();
} while (pElement);
return ByteString();
}
void CXML_Element::GetAttrByIndex(size_t index,
ByteString* space,
ByteString* name,
WideString* value) const {
if (index >= m_AttrMap.size())
return;
const CXML_AttrItem& item = m_AttrMap[index];
*space = item.m_QSpaceName;
*name = item.m_AttrName;
*value = item.m_Value;
}
WideString CXML_Element::GetAttrValue(const ByteStringView& name) const {
ByteStringView bsSpace;
ByteStringView bsName;
SplitQualifiedName(name, &bsSpace, &bsName);
WideString attr;
const WideString* pValue = Lookup(ByteString(bsSpace), ByteString(bsName));
if (pValue)
attr = *pValue;
return attr;
}
int CXML_Element::GetAttrInteger(const ByteStringView& name) const {
ByteStringView bsSpace;
ByteStringView bsName;
SplitQualifiedName(name, &bsSpace, &bsName);
const WideString* pwsValue = Lookup(ByteString(bsSpace), ByteString(bsName));
return pwsValue ? pwsValue->GetInteger() : 0;
}
size_t CXML_Element::CountElements(const ByteStringView& space,
const ByteStringView& tag) const {
size_t count = 0;
for (const auto& pChild : m_Children) {
const CXML_Element* pKid = pChild->AsElement();
if (MatchesElement(pKid, space, tag))
count++;
}
return count;
}
CXML_Object* CXML_Element::GetChild(size_t index) const {
return index < m_Children.size() ? m_Children[index].get() : nullptr;
}
CXML_Element* CXML_Element::GetElement(const ByteStringView& space,
const ByteStringView& tag,
size_t nth) const {
for (const auto& pChild : m_Children) {
CXML_Element* pKid = pChild->AsElement();
if (MatchesElement(pKid, space, tag)) {
if (nth == 0)
return pKid;
--nth;
}
}
return nullptr;
}
void CXML_Element::SetAttribute(const ByteString& space,
const ByteString& name,
const WideString& value) {
for (CXML_AttrItem& item : m_AttrMap) {
if (item.Matches(space, name)) {
item.m_Value = value;
return;
}
}
m_AttrMap.push_back({space, name, WideString(value)});
}
// static
bool CXML_Element::MatchesElement(const CXML_Element* pKid,
const ByteStringView& space,
const ByteStringView& tag) {
return pKid && pKid->m_TagName == tag &&
(space.IsEmpty() || pKid->m_QSpaceName == space);
}
const WideString* CXML_Element::Lookup(const ByteString& space,
const ByteString& name) const {
for (const CXML_AttrItem& item : m_AttrMap) {
if (item.Matches(space, name))
return &item.m_Value;
}
return nullptr;
}
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