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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/cfx_xmlelement.h"
#include <utility>
#include "core/fxcrt/cfx_widetextbuf.h"
#include "core/fxcrt/fx_extension.h"
#include "core/fxcrt/xml/cfx_xmlchardata.h"
#include "core/fxcrt/xml/cfx_xmltext.h"
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
CFX_XMLElement::CFX_XMLElement(const WideString& wsTag)
: CFX_XMLNode(), name_(wsTag) {
ASSERT(!name_.IsEmpty());
}
CFX_XMLElement::~CFX_XMLElement() = default;
FX_XMLNODETYPE CFX_XMLElement::GetType() const {
return FX_XMLNODE_Element;
}
std::unique_ptr<CFX_XMLNode> CFX_XMLElement::Clone() {
auto pClone = pdfium::MakeUnique<CFX_XMLElement>(name_);
pClone->attrs_ = attrs_;
// TODO(dsinclair): This clone is wrong. It doesn't clone child nodes just
// copies text nodes?
WideString wsText;
for (CFX_XMLNode* pChild = GetFirstChild(); pChild;
pChild = pChild->GetNextSibling()) {
if (pChild->GetType() == FX_XMLNODE_Text)
wsText += static_cast<CFX_XMLText*>(pChild)->GetText();
}
pClone->SetTextData(wsText);
return std::move(pClone);
}
WideString CFX_XMLElement::GetLocalTagName() const {
auto pos = name_.Find(L':');
return pos.has_value() ? name_.Right(name_.GetLength() - pos.value() - 1)
: name_;
}
WideString CFX_XMLElement::GetNamespacePrefix() const {
auto pos = name_.Find(L':');
return pos.has_value() ? name_.Left(pos.value()) : WideString();
}
WideString CFX_XMLElement::GetNamespaceURI() const {
WideString attr(L"xmlns");
WideString wsPrefix = GetNamespacePrefix();
if (!wsPrefix.IsEmpty()) {
attr += L":";
attr += wsPrefix;
}
const CFX_XMLNode* pNode = this;
while (pNode) {
if (pNode->GetType() != FX_XMLNODE_Element)
break;
auto* pElement = static_cast<const CFX_XMLElement*>(pNode);
if (!pElement->HasAttribute(attr)) {
pNode = pNode->GetParent();
continue;
}
return pElement->GetAttribute(attr);
}
return L"";
}
WideString CFX_XMLElement::GetTextData() const {
CFX_WideTextBuf buffer;
for (CFX_XMLNode* pChild = GetFirstChild(); pChild;
pChild = pChild->GetNextSibling()) {
if (pChild->GetType() == FX_XMLNODE_Text ||
pChild->GetType() == FX_XMLNODE_CharData) {
buffer << static_cast<CFX_XMLText*>(pChild)->GetText();
}
}
return buffer.MakeString();
}
void CFX_XMLElement::SetTextData(const WideString& wsText) {
// TODO(dsinclair): Shouldn't this remove the children if you set blank text?
if (wsText.IsEmpty())
return;
AppendChild(pdfium::MakeUnique<CFX_XMLText>(wsText));
}
void CFX_XMLElement::Save(const RetainPtr<IFX_SeekableStream>& pXMLStream) {
ByteStringView name_encoded = name_.UTF8Encode().AsStringView();
pXMLStream->WriteString("<");
pXMLStream->WriteString(name_encoded);
for (auto it : attrs_) {
// Note, the space between attributes is added by AttributeToString which
// writes a blank as the first character.
pXMLStream->WriteString(
AttributeToString(it.first, it.second).UTF8Encode().AsStringView());
}
if (!GetFirstChild()) {
pXMLStream->WriteString(" />\n");
return;
}
pXMLStream->WriteString(">\n");
for (CFX_XMLNode* pChild = GetFirstChild(); pChild;
pChild = pChild->GetNextSibling()) {
pChild->Save(pXMLStream);
}
pXMLStream->WriteString("</");
pXMLStream->WriteString(name_encoded);
pXMLStream->WriteString(">\n");
}
CFX_XMLElement* CFX_XMLElement::GetFirstChildNamed(
const WideStringView& name) const {
return GetNthChildNamed(name, 0);
}
CFX_XMLElement* CFX_XMLElement::GetNthChildNamed(const WideStringView& name,
size_t idx) const {
for (auto* child = GetFirstChild(); child; child = child->GetNextSibling()) {
if (child->GetType() != FX_XMLNODE_Element)
continue;
CFX_XMLElement* elem = static_cast<CFX_XMLElement*>(child);
if (elem->name_ != name)
continue;
if (idx == 0)
return elem;
--idx;
}
return nullptr;
}
bool CFX_XMLElement::HasAttribute(const WideString& name) const {
return attrs_.find(name) != attrs_.end();
}
WideString CFX_XMLElement::GetAttribute(const WideString& name) const {
auto it = attrs_.find(name);
return it != attrs_.end() ? it->second : L"";
}
void CFX_XMLElement::SetAttribute(const WideString& name,
const WideString& value) {
attrs_[name] = value;
}
void CFX_XMLElement::RemoveAttribute(const WideString& name) {
attrs_.erase(name);
}
WideString CFX_XMLElement::AttributeToString(const WideString& name,
const WideString& value) {
WideString ret = L" ";
ret += name;
ret += L"=\"";
ret += EncodeEntities(value);
ret += L"\"";
return ret;
}
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