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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 "fxjs/xfa/cjx_node.h"
#include <memory>
#include <utility>
#include <vector>
#include "core/fxcrt/cfx_memorystream.h"
#include "core/fxcrt/fx_codepage.h"
#include "core/fxcrt/xml/cfx_xmldocument.h"
#include "core/fxcrt/xml/cfx_xmlnode.h"
#include "fxjs/js_resources.h"
#include "fxjs/xfa/cfxjse_engine.h"
#include "fxjs/xfa/cfxjse_value.h"
#include "xfa/fxfa/cxfa_eventparam.h"
#include "xfa/fxfa/cxfa_ffdoc.h"
#include "xfa/fxfa/cxfa_ffnotify.h"
#include "xfa/fxfa/parser/cxfa_document.h"
#include "xfa/fxfa/parser/cxfa_document_parser.h"
#include "xfa/fxfa/parser/cxfa_node.h"
#include "xfa/fxfa/parser/xfa_basic_data.h"
#include "xfa/fxfa/parser/xfa_utils.h"
namespace {
enum class EventAppliesToo : uint8_t {
kNone = 0,
kAll = 1,
kAllNonRecursive = 2,
kSubform = 3,
kFieldOrExclusion = 4,
kField = 5,
kSignature = 6,
kChoiceList = 7
};
struct XFA_ExecEventParaInfo {
public:
uint32_t m_uHash; // hashed as wide string.
XFA_EVENTTYPE m_eventType;
EventAppliesToo m_validFlags;
};
#undef PARA
#define PARA(a, b, c, d) a, c, d
const XFA_ExecEventParaInfo gs_eventParaInfos[] = {
{PARA(0x109d7ce7,
"mouseEnter",
XFA_EVENT_MouseEnter,
EventAppliesToo::kField)},
{PARA(0x1bfc72d9,
"preOpen",
XFA_EVENT_PreOpen,
EventAppliesToo::kChoiceList)},
{PARA(0x2196a452,
"initialize",
XFA_EVENT_Initialize,
EventAppliesToo::kAll)},
{PARA(0x27410f03,
"mouseExit",
XFA_EVENT_MouseExit,
EventAppliesToo::kField)},
{PARA(0x36f1c6d8,
"preSign",
XFA_EVENT_PreSign,
EventAppliesToo::kSignature)},
{PARA(0x4731d6ba,
"exit",
XFA_EVENT_Exit,
EventAppliesToo::kAllNonRecursive)},
{PARA(0x7233018a, "validate", XFA_EVENT_Validate, EventAppliesToo::kAll)},
{PARA(0x8808385e,
"indexChange",
XFA_EVENT_IndexChange,
EventAppliesToo::kSubform)},
{PARA(0x891f4606,
"change",
XFA_EVENT_Change,
EventAppliesToo::kFieldOrExclusion)},
{PARA(0x9f693b21,
"mouseDown",
XFA_EVENT_MouseDown,
EventAppliesToo::kField)},
{PARA(0xcdce56b3,
"full",
XFA_EVENT_Full,
EventAppliesToo::kFieldOrExclusion)},
{PARA(0xd576d08e, "mouseUp", XFA_EVENT_MouseUp, EventAppliesToo::kField)},
{PARA(0xd95657a6,
"click",
XFA_EVENT_Click,
EventAppliesToo::kFieldOrExclusion)},
{PARA(0xdbfbe02e, "calculate", XFA_EVENT_Calculate, EventAppliesToo::kAll)},
{PARA(0xe25fa7b8,
"postOpen",
XFA_EVENT_PostOpen,
EventAppliesToo::kChoiceList)},
{PARA(0xe28dce7e,
"enter",
XFA_EVENT_Enter,
EventAppliesToo::kAllNonRecursive)},
{PARA(0xfd54fbb7,
"postSign",
XFA_EVENT_PostSign,
EventAppliesToo::kSignature)},
};
#undef PARA
const XFA_ExecEventParaInfo* GetEventParaInfoByName(
WideStringView wsEventName) {
if (wsEventName.IsEmpty())
return nullptr;
uint32_t uHash = FX_HashCode_GetW(wsEventName, false);
auto* result = std::lower_bound(
std::begin(gs_eventParaInfos), std::end(gs_eventParaInfos), uHash,
[](const XFA_ExecEventParaInfo& iter, const uint16_t& hash) {
return iter.m_uHash < hash;
});
if (result != std::end(gs_eventParaInfos) && result->m_uHash == uHash)
return result;
return nullptr;
}
} // namespace
const CJX_MethodSpec CJX_Node::MethodSpecs[] = {
{"applyXSL", applyXSL_static},
{"assignNode", assignNode_static},
{"clone", clone_static},
{"getAttribute", getAttribute_static},
{"getElement", getElement_static},
{"isPropertySpecified", isPropertySpecified_static},
{"loadXML", loadXML_static},
{"saveFilteredXML", saveFilteredXML_static},
{"saveXML", saveXML_static},
{"setAttribute", setAttribute_static},
{"setElement", setElement_static}};
CJX_Node::CJX_Node(CXFA_Node* node) : CJX_Tree(node) {
DefineMethods(MethodSpecs);
}
CJX_Node::~CJX_Node() = default;
bool CJX_Node::DynamicTypeIs(TypeTag eType) const {
return eType == static_type__ || ParentType__::DynamicTypeIs(eType);
}
CXFA_Node* CJX_Node::GetXFANode() const {
return ToNode(GetXFAObject());
}
CJS_Result CJX_Node::applyXSL(CFX_V8* runtime,
const std::vector<v8::Local<v8::Value>>& params) {
if (params.size() != 1)
return CJS_Result::Failure(JSMessage::kParamError);
// TODO(weili): check whether we need to implement this, pdfium:501.
return CJS_Result::Success();
}
CJS_Result CJX_Node::assignNode(
CFX_V8* runtime,
const std::vector<v8::Local<v8::Value>>& params) {
if (params.empty() || params.size() > 3)
return CJS_Result::Failure(JSMessage::kParamError);
// TODO(weili): check whether we need to implement this, pdfium:501.
return CJS_Result::Success();
}
CJS_Result CJX_Node::clone(CFX_V8* runtime,
const std::vector<v8::Local<v8::Value>>& params) {
if (params.size() != 1)
return CJS_Result::Failure(JSMessage::kParamError);
CXFA_Node* pCloneNode = GetXFANode()->Clone(runtime->ToBoolean(params[0]));
CFXJSE_Value* value =
GetDocument()->GetScriptContext()->GetOrCreateJSBindingFromMap(
pCloneNode);
return CJS_Result::Success(
value->DirectGetValue().Get(runtime->GetIsolate()));
}
CJS_Result CJX_Node::getAttribute(
CFX_V8* runtime,
const std::vector<v8::Local<v8::Value>>& params) {
if (params.size() != 1)
return CJS_Result::Failure(JSMessage::kParamError);
WideString expression = runtime->ToWideString(params[0]);
return CJS_Result::Success(runtime->NewString(
GetAttribute(expression.AsStringView()).ToUTF8().AsStringView()));
}
CJS_Result CJX_Node::getElement(
CFX_V8* runtime,
const std::vector<v8::Local<v8::Value>>& params) {
if (params.empty() || params.size() > 2)
return CJS_Result::Failure(JSMessage::kParamError);
WideString expression = runtime->ToWideString(params[0]);
int32_t iValue = params.size() >= 2 ? runtime->ToInt32(params[1]) : 0;
XFA_Element eElement = XFA_GetElementByName(expression.AsStringView());
if (eElement == XFA_Element::Unknown)
return CJS_Result::Success(runtime->NewNull());
CXFA_Node* pNode = GetOrCreateProperty<CXFA_Node>(iValue, eElement);
if (!pNode)
return CJS_Result::Success(runtime->NewNull());
CFXJSE_Value* value =
GetDocument()->GetScriptContext()->GetOrCreateJSBindingFromMap(pNode);
return CJS_Result::Success(
value->DirectGetValue().Get(runtime->GetIsolate()));
}
CJS_Result CJX_Node::isPropertySpecified(
CFX_V8* runtime,
const std::vector<v8::Local<v8::Value>>& params) {
if (params.empty() || params.size() > 3)
return CJS_Result::Failure(JSMessage::kParamError);
WideString expression = runtime->ToWideString(params[0]);
Optional<XFA_ATTRIBUTEINFO> attr =
XFA_GetAttributeByName(expression.AsStringView());
if (attr.has_value() && HasAttribute(attr.value().attribute))
return CJS_Result::Success(runtime->NewBoolean(true));
XFA_Element eType = XFA_GetElementByName(expression.AsStringView());
if (eType == XFA_Element::Unknown)
return CJS_Result::Success(runtime->NewBoolean(false));
bool bParent = params.size() < 2 || runtime->ToBoolean(params[1]);
int32_t iIndex = params.size() == 3 ? runtime->ToInt32(params[2]) : 0;
bool bHas = !!GetOrCreateProperty<CXFA_Node>(iIndex, eType);
if (!bHas && bParent && GetXFANode()->GetParent()) {
// Also check on the parent.
auto* jsnode = GetXFANode()->GetParent()->JSObject();
bHas = jsnode->HasAttribute(attr.value().attribute) ||
!!jsnode->GetOrCreateProperty<CXFA_Node>(iIndex, eType);
}
return CJS_Result::Success(runtime->NewBoolean(bHas));
}
CJS_Result CJX_Node::loadXML(CFX_V8* runtime,
const std::vector<v8::Local<v8::Value>>& params) {
if (params.empty() || params.size() > 3)
return CJS_Result::Failure(JSMessage::kParamError);
ByteString expression = runtime->ToByteString(params[0]);
if (expression.IsEmpty())
return CJS_Result::Success();
bool bIgnoreRoot = true;
if (params.size() >= 2)
bIgnoreRoot = runtime->ToBoolean(params[1]);
bool bOverwrite = 0;
if (params.size() >= 3)
bOverwrite = runtime->ToBoolean(params[2]);
auto pParser = std::make_unique<CXFA_DocumentParser>(GetDocument());
CFX_XMLNode* pXMLNode = pParser->ParseXMLData(expression);
if (!pXMLNode)
return CJS_Result::Success();
CFX_XMLDocument* top_xml_doc =
GetXFANode()->GetDocument()->GetNotify()->GetHDOC()->GetXMLDocument();
top_xml_doc->AppendNodesFrom(pParser->GetXMLDoc().get());
if (bIgnoreRoot &&
(pXMLNode->GetType() != CFX_XMLNode::Type::kElement ||
XFA_RecognizeRichText(static_cast<CFX_XMLElement*>(pXMLNode)))) {
bIgnoreRoot = false;
}
CXFA_Node* pFakeRoot = GetXFANode()->Clone(false);
WideString wsContentType = GetCData(XFA_Attribute::ContentType);
if (!wsContentType.IsEmpty()) {
pFakeRoot->JSObject()->SetCData(XFA_Attribute::ContentType,
WideString(wsContentType), false, false);
}
CFX_XMLNode* pFakeXMLRoot = pFakeRoot->GetXMLMappingNode();
if (!pFakeXMLRoot) {
CFX_XMLNode* pThisXMLRoot = GetXFANode()->GetXMLMappingNode();
CFX_XMLNode* clone;
if (pThisXMLRoot) {
clone = pThisXMLRoot->Clone(top_xml_doc);
} else {
clone = top_xml_doc->CreateNode<CFX_XMLElement>(
WideString::FromASCII(GetXFANode()->GetClassName()));
}
pFakeXMLRoot = clone;
}
if (bIgnoreRoot) {
CFX_XMLNode* pXMLChild = pXMLNode->GetFirstChild();
while (pXMLChild) {
CFX_XMLNode* pXMLSibling = pXMLChild->GetNextSibling();
pXMLNode->RemoveChild(pXMLChild);
pFakeXMLRoot->AppendLastChild(pXMLChild);
pXMLChild = pXMLSibling;
}
} else {
pXMLNode->RemoveSelfIfParented();
pFakeXMLRoot->AppendLastChild(pXMLNode);
}
pParser->ConstructXFANode(pFakeRoot, pFakeXMLRoot);
pFakeRoot = pParser->GetRootNode();
if (!pFakeRoot)
return CJS_Result::Success();
if (bOverwrite) {
CXFA_Node* pChild = GetXFANode()->GetFirstChild();
CXFA_Node* pNewChild = pFakeRoot->GetFirstChild();
int32_t index = 0;
while (pNewChild) {
CXFA_Node* pItem = pNewChild->GetNextSibling();
pFakeRoot->RemoveChildAndNotify(pNewChild, true);
GetXFANode()->InsertChildAndNotify(index++, pNewChild);
pNewChild->SetFlagAndNotify(XFA_NodeFlag_Initialized);
pNewChild = pItem;
}
while (pChild) {
CXFA_Node* pItem = pChild->GetNextSibling();
GetXFANode()->RemoveChildAndNotify(pChild, true);
pFakeRoot->InsertChildAndNotify(pChild, nullptr);
pChild = pItem;
}
if (GetXFANode()->GetPacketType() == XFA_PacketType::Form &&
GetXFANode()->GetElementType() == XFA_Element::ExData) {
CFX_XMLNode* pTempXMLNode = GetXFANode()->GetXMLMappingNode();
GetXFANode()->SetXMLMappingNode(pFakeXMLRoot);
if (pTempXMLNode && !pTempXMLNode->GetParent())
pFakeXMLRoot = pTempXMLNode;
else
pFakeXMLRoot = nullptr;
}
MoveBufferMapData(pFakeRoot, GetXFANode());
} else {
CXFA_Node* pChild = pFakeRoot->GetFirstChild();
while (pChild) {
CXFA_Node* pItem = pChild->GetNextSibling();
pFakeRoot->RemoveChildAndNotify(pChild, true);
GetXFANode()->InsertChildAndNotify(pChild, nullptr);
pChild->SetFlagAndNotify(XFA_NodeFlag_Initialized);
pChild = pItem;
}
}
if (pFakeXMLRoot) {
pFakeRoot->SetXMLMappingNode(std::move(pFakeXMLRoot));
}
pFakeRoot->SetFlag(XFA_NodeFlag_HasRemovedChildren);
return CJS_Result::Success();
}
CJS_Result CJX_Node::saveFilteredXML(
CFX_V8* runtime,
const std::vector<v8::Local<v8::Value>>& params) {
// TODO(weili): Check whether we need to implement this, pdfium:501.
return CJS_Result::Success();
}
CJS_Result CJX_Node::saveXML(CFX_V8* runtime,
const std::vector<v8::Local<v8::Value>>& params) {
if (params.size() > 1)
return CJS_Result::Failure(JSMessage::kParamError);
if (params.size() == 1 &&
!runtime->ToWideString(params[0]).EqualsASCII("pretty")) {
return CJS_Result::Failure(JSMessage::kValueError);
}
// TODO(weili): Check whether we need to save pretty print XML, pdfium:501.
ByteString bsXMLHeader = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
if (GetXFANode()->GetPacketType() != XFA_PacketType::Form &&
GetXFANode()->GetPacketType() != XFA_PacketType::Datasets) {
return CJS_Result::Success(runtime->NewString(""));
}
CFX_XMLNode* pElement = nullptr;
if (GetXFANode()->GetPacketType() == XFA_PacketType::Datasets) {
pElement = GetXFANode()->GetXMLMappingNode();
if (!pElement || pElement->GetType() != CFX_XMLNode::Type::kElement) {
return CJS_Result::Success(
runtime->NewString(bsXMLHeader.AsStringView()));
}
XFA_DataExporter_DealWithDataGroupNode(GetXFANode());
}
auto pMemoryStream = pdfium::MakeRetain<CFX_MemoryStream>();
pMemoryStream->WriteString(bsXMLHeader.AsStringView());
if (GetXFANode()->GetPacketType() == XFA_PacketType::Form) {
XFA_DataExporter_RegenerateFormFile(GetXFANode(), pMemoryStream, true);
} else {
pElement->Save(pMemoryStream);
}
return CJS_Result::Success(runtime->NewString(
ByteStringView(pMemoryStream->GetBuffer(), pMemoryStream->GetSize())));
}
CJS_Result CJX_Node::setAttribute(
CFX_V8* runtime,
const std::vector<v8::Local<v8::Value>>& params) {
if (params.size() != 2)
return CJS_Result::Failure(JSMessage::kParamError);
// Note: yes, arglist is spec'd absolutely backwards from what any sane
// person would do, namely value first, attribute second.
WideString attributeValue = runtime->ToWideString(params[0]);
WideString attribute = runtime->ToWideString(params[1]);
// Pass them to our method, however, in the more usual manner.
SetAttribute(attribute.AsStringView(), attributeValue.AsStringView(), true);
return CJS_Result::Success();
}
CJS_Result CJX_Node::setElement(
CFX_V8* runtime,
const std::vector<v8::Local<v8::Value>>& params) {
if (params.size() != 1 && params.size() != 2)
return CJS_Result::Failure(JSMessage::kParamError);
// TODO(weili): check whether we need to implement this, pdfium:501.
return CJS_Result::Success();
}
void CJX_Node::ns(CFXJSE_Value* pValue,
bool bSetting,
XFA_Attribute eAttribute) {
if (bSetting) {
ThrowInvalidPropertyException();
return;
}
pValue->SetString(
TryNamespace().value_or(WideString()).ToUTF8().AsStringView());
}
void CJX_Node::model(CFXJSE_Value* pValue,
bool bSetting,
XFA_Attribute eAttribute) {
if (bSetting) {
ThrowInvalidPropertyException();
return;
}
pValue->Assign(GetDocument()->GetScriptContext()->GetOrCreateJSBindingFromMap(
GetXFANode()->GetModelNode()));
}
void CJX_Node::isContainer(CFXJSE_Value* pValue,
bool bSetting,
XFA_Attribute eAttribute) {
if (bSetting) {
ThrowInvalidPropertyException();
return;
}
pValue->SetBoolean(GetXFANode()->IsContainerNode());
}
void CJX_Node::isNull(CFXJSE_Value* pValue,
bool bSetting,
XFA_Attribute eAttribute) {
if (bSetting) {
ThrowInvalidPropertyException();
return;
}
if (GetXFANode()->GetElementType() == XFA_Element::Subform) {
pValue->SetBoolean(false);
return;
}
pValue->SetBoolean(GetContent(false).IsEmpty());
}
void CJX_Node::oneOfChild(CFXJSE_Value* pValue,
bool bSetting,
XFA_Attribute eAttribute) {
if (bSetting) {
ThrowInvalidPropertyException();
return;
}
std::vector<CXFA_Node*> properties =
GetXFANode()->GetNodeListWithFilter(XFA_NODEFILTER_OneOfProperty);
if (!properties.empty()) {
pValue->Assign(
GetDocument()->GetScriptContext()->GetOrCreateJSBindingFromMap(
properties.front()));
}
}
XFA_EventError CJX_Node::execSingleEventByName(WideStringView wsEventName,
XFA_Element eType) {
CXFA_FFNotify* pNotify = GetDocument()->GetNotify();
if (!pNotify)
return XFA_EventError::kNotExist;
const XFA_ExecEventParaInfo* eventParaInfo =
GetEventParaInfoByName(wsEventName);
if (!eventParaInfo)
return XFA_EventError::kNotExist;
switch (eventParaInfo->m_validFlags) {
case EventAppliesToo::kNone:
return XFA_EventError::kNotExist;
case EventAppliesToo::kAll:
case EventAppliesToo::kAllNonRecursive:
return pNotify->ExecEventByDeepFirst(
GetXFANode(), eventParaInfo->m_eventType, false,
eventParaInfo->m_validFlags == EventAppliesToo::kAll);
case EventAppliesToo::kSubform:
if (eType != XFA_Element::Subform)
return XFA_EventError::kNotExist;
return pNotify->ExecEventByDeepFirst(
GetXFANode(), eventParaInfo->m_eventType, false, false);
case EventAppliesToo::kFieldOrExclusion: {
if (eType != XFA_Element::ExclGroup && eType != XFA_Element::Field)
return XFA_EventError::kNotExist;
CXFA_Node* pParentNode = GetXFANode()->GetParent();
if (pParentNode &&
pParentNode->GetElementType() == XFA_Element::ExclGroup) {
// TODO(dsinclair): This seems like a bug, we do the same work twice?
pNotify->ExecEventByDeepFirst(GetXFANode(), eventParaInfo->m_eventType,
false, false);
}
return pNotify->ExecEventByDeepFirst(
GetXFANode(), eventParaInfo->m_eventType, false, false);
}
case EventAppliesToo::kField:
if (eType != XFA_Element::Field)
return XFA_EventError::kNotExist;
return pNotify->ExecEventByDeepFirst(
GetXFANode(), eventParaInfo->m_eventType, false, false);
case EventAppliesToo::kSignature: {
if (!GetXFANode()->IsWidgetReady())
return XFA_EventError::kNotExist;
if (GetXFANode()->GetUIChildNode()->GetElementType() !=
XFA_Element::Signature) {
return XFA_EventError::kNotExist;
}
return pNotify->ExecEventByDeepFirst(
GetXFANode(), eventParaInfo->m_eventType, false, false);
}
case EventAppliesToo::kChoiceList: {
if (!GetXFANode()->IsWidgetReady())
return XFA_EventError::kNotExist;
if (GetXFANode()->GetUIChildNode()->GetElementType() !=
XFA_Element::ChoiceList) {
return XFA_EventError::kNotExist;
}
return pNotify->ExecEventByDeepFirst(
GetXFANode(), eventParaInfo->m_eventType, false, false);
}
}
return XFA_EventError::kNotExist;
}