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// Copyright 2014 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 "xfa/fxfa/fm2js/cxfa_fmexpression.h"
#include <utility>
#include "core/fxcrt/cfx_widetextbuf.h"
namespace {
const wchar_t RUNTIMEBLOCKTEMPARRAY[] = L"pfm_ary";
const wchar_t RUNTIMEBLOCKTEMPARRAYINDEX[] = L"pfm_ary_idx";
const wchar_t kLessEqual[] = L" <= ";
const wchar_t kGreaterEqual[] = L" >= ";
const wchar_t kPlusEqual[] = L" += ";
const wchar_t kMinusEqual[] = L" -= ";
} // namespace
CXFA_FMExpression::CXFA_FMExpression(uint32_t line)
: m_type(XFA_FM_EXPTYPE_UNKNOWN), m_line(line) {}
CXFA_FMExpression::CXFA_FMExpression(uint32_t line, XFA_FM_EXPTYPE type)
: m_type(type), m_line(line) {}
bool CXFA_FMExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
return true;
}
bool CXFA_FMExpression::ToImpliedReturnJS(CFX_WideTextBuf& javascript) {
return true;
}
CXFA_FMFunctionDefinition::CXFA_FMFunctionDefinition(
uint32_t line,
bool isGlobal,
const WideStringView& wsName,
std::vector<WideStringView>&& arguments,
std::vector<std::unique_ptr<CXFA_FMExpression>>&& expressions)
: CXFA_FMExpression(line, XFA_FM_EXPTYPE_FUNC),
m_wsName(wsName),
m_pArguments(std::move(arguments)),
m_pExpressions(std::move(expressions)),
m_isGlobal(isGlobal) {}
CXFA_FMFunctionDefinition::~CXFA_FMFunctionDefinition() {}
bool CXFA_FMFunctionDefinition::ToJavaScript(CFX_WideTextBuf& javascript) {
if (m_isGlobal && m_pExpressions.empty()) {
javascript << L"// comments only";
return true;
}
if (m_isGlobal) {
javascript << L"(\n";
}
javascript << L"function ";
if (!m_wsName.IsEmpty() && m_wsName[0] == L'!') {
WideString tempName =
EXCLAMATION_IN_IDENTIFIER + m_wsName.Right(m_wsName.GetLength() - 1);
javascript << tempName;
} else {
javascript << m_wsName;
}
javascript << L"(";
bool bNeedComma = false;
for (const auto& identifier : m_pArguments) {
if (bNeedComma)
javascript << L", ";
if (identifier[0] == L'!') {
WideString tempIdentifier = EXCLAMATION_IN_IDENTIFIER +
identifier.Right(identifier.GetLength() - 1);
javascript << tempIdentifier;
} else {
javascript << identifier;
}
bNeedComma = true;
}
javascript << L")\n{\n";
javascript << L"var ";
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = null;\n";
for (const auto& expr : m_pExpressions) {
bool ret;
if (expr == m_pExpressions.back())
ret = expr->ToImpliedReturnJS(javascript);
else
ret = expr->ToJavaScript(javascript);
if (!ret || CFXA_IsTooBig(javascript))
return false;
}
javascript << L"return ";
if (m_isGlobal) {
javascript << XFA_FM_EXPTypeToString(GETFMVALUE);
javascript << L"(";
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L")";
} else {
javascript << RUNTIMEFUNCTIONRETURNVALUE;
}
javascript << L";\n}\n";
if (m_isGlobal) {
javascript << L").call(this);\n";
}
return true;
}
bool CXFA_FMFunctionDefinition::ToImpliedReturnJS(CFX_WideTextBuf&) {
return true;
}
CXFA_FMVarExpression::CXFA_FMVarExpression(
uint32_t line,
const WideStringView& wsName,
std::unique_ptr<CXFA_FMExpression> pInit)
: CXFA_FMExpression(line, XFA_FM_EXPTYPE_VAR),
m_wsName(wsName),
m_pInit(std::move(pInit)) {}
CXFA_FMVarExpression::~CXFA_FMVarExpression() {}
bool CXFA_FMVarExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
javascript << L"var ";
WideString tempName(m_wsName);
if (m_wsName[0] == L'!') {
tempName =
EXCLAMATION_IN_IDENTIFIER + m_wsName.Right(m_wsName.GetLength() - 1);
}
javascript << tempName;
javascript << L" = ";
if (m_pInit) {
if (!m_pInit->ToJavaScript(javascript))
return false;
javascript << tempName;
javascript << L" = ";
javascript << XFA_FM_EXPTypeToString(VARFILTER);
javascript << L"(";
javascript << tempName;
javascript << L");\n";
} else {
javascript << L"\"\";\n";
}
return true;
}
bool CXFA_FMVarExpression::ToImpliedReturnJS(CFX_WideTextBuf& javascript) {
javascript << L"var ";
WideString tempName(m_wsName);
if (m_wsName[0] == L'!') {
tempName =
EXCLAMATION_IN_IDENTIFIER + m_wsName.Right(m_wsName.GetLength() - 1);
}
javascript << tempName;
javascript << L" = ";
if (m_pInit) {
if (!m_pInit->ToJavaScript(javascript))
return false;
javascript << tempName;
javascript << L" = ";
javascript << XFA_FM_EXPTypeToString(VARFILTER);
javascript << L"(";
javascript << tempName;
javascript << L");\n";
} else {
javascript << L"\"\";\n";
}
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = ";
javascript << tempName;
javascript << L";\n";
return true;
}
CXFA_FMExpExpression::CXFA_FMExpExpression(
uint32_t line,
std::unique_ptr<CXFA_FMSimpleExpression> pExpression)
: CXFA_FMExpression(line, XFA_FM_EXPTYPE_EXP),
m_pExpression(std::move(pExpression)) {}
CXFA_FMExpExpression::~CXFA_FMExpExpression() {}
bool CXFA_FMExpExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
bool ret = m_pExpression->ToJavaScript(javascript);
if (m_pExpression->GetOperatorToken() != TOKassign)
javascript << L";\n";
return ret;
}
bool CXFA_FMExpExpression::ToImpliedReturnJS(CFX_WideTextBuf& javascript) {
if (m_pExpression->GetOperatorToken() == TOKassign)
return m_pExpression->ToImpliedReturnJS(javascript);
if (m_pExpression->GetOperatorToken() == TOKstar ||
m_pExpression->GetOperatorToken() == TOKdotstar ||
m_pExpression->GetOperatorToken() == TOKdotscream ||
m_pExpression->GetOperatorToken() == TOKdotdot ||
m_pExpression->GetOperatorToken() == TOKdot) {
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = ";
javascript << XFA_FM_EXPTypeToString(GETFMVALUE);
javascript << L"(";
if (!m_pExpression->ToJavaScript(javascript))
return false;
javascript << L");\n";
return true;
}
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = ";
if (!m_pExpression->ToJavaScript(javascript))
return false;
javascript << L";\n";
return true;
}
CXFA_FMBlockExpression::CXFA_FMBlockExpression(
uint32_t line,
std::vector<std::unique_ptr<CXFA_FMExpression>>&& pExpressionList)
: CXFA_FMExpression(line, XFA_FM_EXPTYPE_BLOCK),
m_ExpressionList(std::move(pExpressionList)) {}
CXFA_FMBlockExpression::~CXFA_FMBlockExpression() {}
bool CXFA_FMBlockExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
javascript << L"{\n";
for (const auto& expr : m_ExpressionList) {
if (!expr->ToJavaScript(javascript) || CFXA_IsTooBig(javascript))
return false;
}
javascript << L"}\n";
return true;
}
bool CXFA_FMBlockExpression::ToImpliedReturnJS(CFX_WideTextBuf& javascript) {
javascript << L"{\n";
for (const auto& expr : m_ExpressionList) {
bool ret;
if (expr == m_ExpressionList.back())
ret = expr->ToImpliedReturnJS(javascript);
else
ret = expr->ToJavaScript(javascript);
if (!ret || CFXA_IsTooBig(javascript))
return false;
}
javascript << L"}\n";
return true;
}
CXFA_FMDoExpression::CXFA_FMDoExpression(
uint32_t line,
std::unique_ptr<CXFA_FMExpression> pList)
: CXFA_FMExpression(line), m_pList(std::move(pList)) {}
CXFA_FMDoExpression::~CXFA_FMDoExpression() {}
bool CXFA_FMDoExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
return m_pList->ToJavaScript(javascript);
}
bool CXFA_FMDoExpression::ToImpliedReturnJS(CFX_WideTextBuf& javascript) {
return m_pList->ToImpliedReturnJS(javascript);
}
CXFA_FMIfExpression::CXFA_FMIfExpression(
uint32_t line,
std::unique_ptr<CXFA_FMSimpleExpression> pExpression,
std::unique_ptr<CXFA_FMExpression> pIfExpression,
std::unique_ptr<CXFA_FMExpression> pElseExpression)
: CXFA_FMExpression(line, XFA_FM_EXPTYPE_IF),
m_pExpression(std::move(pExpression)),
m_pIfExpression(std::move(pIfExpression)),
m_pElseExpression(std::move(pElseExpression)) {}
CXFA_FMIfExpression::~CXFA_FMIfExpression() {}
bool CXFA_FMIfExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
javascript << L"if (";
if (m_pExpression) {
javascript << XFA_FM_EXPTypeToString(GETFMVALUE);
javascript << L"(";
if (!m_pExpression->ToJavaScript(javascript))
return false;
javascript << L")";
}
javascript << L")\n";
if (CFXA_IsTooBig(javascript))
return false;
if (m_pIfExpression) {
if (!m_pIfExpression->ToJavaScript(javascript))
return false;
if (CFXA_IsTooBig(javascript))
return false;
}
if (m_pElseExpression) {
if (m_pElseExpression->GetExpType() == XFA_FM_EXPTYPE_IF) {
javascript << L"else\n";
javascript << L"{\n";
if (!m_pElseExpression->ToJavaScript(javascript))
return false;
javascript << L"}\n";
} else {
javascript << L"else\n";
if (!m_pElseExpression->ToJavaScript(javascript))
return false;
}
}
return !CFXA_IsTooBig(javascript);
}
bool CXFA_FMIfExpression::ToImpliedReturnJS(CFX_WideTextBuf& javascript) {
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = 0;\n";
javascript << L"if (";
if (m_pExpression) {
javascript << XFA_FM_EXPTypeToString(GETFMVALUE);
javascript << L"(";
if (!m_pExpression->ToJavaScript(javascript))
return false;
javascript << L")";
}
javascript << L")\n";
if (CFXA_IsTooBig(javascript))
return false;
if (m_pIfExpression) {
if (!m_pIfExpression->ToImpliedReturnJS(javascript))
return false;
if (CFXA_IsTooBig(javascript))
return false;
}
if (m_pElseExpression) {
if (m_pElseExpression->GetExpType() == XFA_FM_EXPTYPE_IF) {
javascript << L"else\n";
javascript << L"{\n";
if (!m_pElseExpression->ToImpliedReturnJS(javascript))
return false;
javascript << L"}\n";
} else {
javascript << L"else\n";
if (!m_pElseExpression->ToImpliedReturnJS(javascript))
return false;
}
}
return !CFXA_IsTooBig(javascript);
}
CXFA_FMLoopExpression::~CXFA_FMLoopExpression() {}
bool CXFA_FMLoopExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
return true;
}
bool CXFA_FMLoopExpression::ToImpliedReturnJS(CFX_WideTextBuf&) {
return true;
}
CXFA_FMWhileExpression::CXFA_FMWhileExpression(
uint32_t line,
std::unique_ptr<CXFA_FMSimpleExpression> pCondition,
std::unique_ptr<CXFA_FMExpression> pExpression)
: CXFA_FMLoopExpression(line),
m_pCondition(std::move(pCondition)),
m_pExpression(std::move(pExpression)) {}
CXFA_FMWhileExpression::~CXFA_FMWhileExpression() {}
bool CXFA_FMWhileExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
javascript << L"while (";
if (!m_pCondition->ToJavaScript(javascript))
return false;
javascript << L")\n";
if (CFXA_IsTooBig(javascript))
return false;
if (!m_pExpression->ToJavaScript(javascript))
return false;
return !CFXA_IsTooBig(javascript);
}
bool CXFA_FMWhileExpression::ToImpliedReturnJS(CFX_WideTextBuf& javascript) {
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = 0;\n";
javascript << L"while (";
if (!m_pCondition->ToJavaScript(javascript))
return false;
javascript << L")\n";
if (CFXA_IsTooBig(javascript))
return false;
if (!m_pExpression->ToImpliedReturnJS(javascript))
return false;
return !CFXA_IsTooBig(javascript);
}
CXFA_FMBreakExpression::CXFA_FMBreakExpression(uint32_t line)
: CXFA_FMExpression(line, XFA_FM_EXPTYPE_BREAK) {}
CXFA_FMBreakExpression::~CXFA_FMBreakExpression() {}
bool CXFA_FMBreakExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = 0;\n";
javascript << L"break;\n";
return true;
}
bool CXFA_FMBreakExpression::ToImpliedReturnJS(CFX_WideTextBuf& javascript) {
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = 0;\n";
javascript << L"break;\n";
return true;
}
CXFA_FMContinueExpression::CXFA_FMContinueExpression(uint32_t line)
: CXFA_FMExpression(line, XFA_FM_EXPTYPE_CONTINUE) {}
CXFA_FMContinueExpression::~CXFA_FMContinueExpression() {}
bool CXFA_FMContinueExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = 0;\n";
javascript << L"continue;\n";
return true;
}
bool CXFA_FMContinueExpression::ToImpliedReturnJS(CFX_WideTextBuf& javascript) {
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = 0;\n";
javascript << L"continue;\n";
return true;
}
CXFA_FMForExpression::CXFA_FMForExpression(
uint32_t line,
const WideStringView& wsVariant,
std::unique_ptr<CXFA_FMSimpleExpression> pAssignment,
std::unique_ptr<CXFA_FMSimpleExpression> pAccessor,
int32_t iDirection,
std::unique_ptr<CXFA_FMSimpleExpression> pStep,
std::unique_ptr<CXFA_FMExpression> pList)
: CXFA_FMLoopExpression(line),
m_wsVariant(wsVariant),
m_pAssignment(std::move(pAssignment)),
m_pAccessor(std::move(pAccessor)),
m_bDirection(iDirection == 1),
m_pStep(std::move(pStep)),
m_pList(std::move(pList)) {}
CXFA_FMForExpression::~CXFA_FMForExpression() {}
bool CXFA_FMForExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
javascript << L"{\nvar ";
WideString tempVariant;
if (m_wsVariant[0] == L'!') {
tempVariant = EXCLAMATION_IN_IDENTIFIER +
m_wsVariant.Right(m_wsVariant.GetLength() - 1);
javascript << tempVariant;
} else {
tempVariant = m_wsVariant;
javascript << m_wsVariant;
}
javascript << L" = null;\n";
javascript << L"for (";
javascript << tempVariant;
javascript << L" = ";
javascript << XFA_FM_EXPTypeToString(GETFMVALUE);
javascript << L"(";
if (!m_pAssignment->ToJavaScript(javascript))
return false;
javascript << L"); ";
javascript << tempVariant;
if (CFXA_IsTooBig(javascript))
return false;
javascript << (m_bDirection ? kLessEqual : kGreaterEqual);
javascript << XFA_FM_EXPTypeToString(GETFMVALUE);
javascript << L"(";
if (!m_pAccessor->ToJavaScript(javascript))
return false;
javascript << L"); ";
javascript << tempVariant;
javascript << (m_bDirection ? kPlusEqual : kMinusEqual);
if (CFXA_IsTooBig(javascript))
return false;
if (m_pStep) {
javascript << XFA_FM_EXPTypeToString(GETFMVALUE);
javascript << L"(";
if (!m_pStep->ToJavaScript(javascript))
return false;
javascript << L")";
if (CFXA_IsTooBig(javascript))
return false;
} else {
javascript << L"1";
}
javascript << L")\n";
if (!m_pList->ToJavaScript(javascript))
return false;
javascript << L"}\n";
return !CFXA_IsTooBig(javascript);
}
bool CXFA_FMForExpression::ToImpliedReturnJS(CFX_WideTextBuf& javascript) {
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = 0;\n";
javascript << L"{\nvar ";
WideString tempVariant;
if (m_wsVariant[0] == L'!') {
tempVariant = EXCLAMATION_IN_IDENTIFIER +
m_wsVariant.Right(m_wsVariant.GetLength() - 1);
javascript << tempVariant;
} else {
tempVariant = m_wsVariant;
javascript << m_wsVariant;
}
javascript << L" = null;\n";
javascript << L"for (";
javascript << tempVariant;
javascript << L" = ";
javascript << XFA_FM_EXPTypeToString(GETFMVALUE);
javascript << L"(";
if (!m_pAssignment->ToJavaScript(javascript))
return false;
javascript << L"); ";
javascript << tempVariant;
if (CFXA_IsTooBig(javascript))
return false;
javascript << (m_bDirection ? kLessEqual : kGreaterEqual);
javascript << XFA_FM_EXPTypeToString(GETFMVALUE);
javascript << L"(";
if (!m_pAccessor->ToJavaScript(javascript))
return false;
javascript << L"); ";
javascript << tempVariant;
javascript << L" += ";
javascript << (m_bDirection ? kPlusEqual : kMinusEqual);
if (CFXA_IsTooBig(javascript))
return false;
if (m_pStep) {
javascript << XFA_FM_EXPTypeToString(GETFMVALUE);
javascript << L"(";
if (!m_pStep->ToJavaScript(javascript))
return false;
javascript << L")";
if (CFXA_IsTooBig(javascript))
return false;
} else {
javascript << L"1";
}
javascript << L")\n";
if (!m_pList->ToImpliedReturnJS(javascript))
return false;
javascript << L"}\n";
return !CFXA_IsTooBig(javascript);
}
CXFA_FMForeachExpression::CXFA_FMForeachExpression(
uint32_t line,
const WideStringView& wsIdentifier,
std::vector<std::unique_ptr<CXFA_FMSimpleExpression>>&& pAccessors,
std::unique_ptr<CXFA_FMExpression> pList)
: CXFA_FMLoopExpression(line),
m_wsIdentifier(wsIdentifier),
m_pAccessors(std::move(pAccessors)),
m_pList(std::move(pList)) {}
CXFA_FMForeachExpression::~CXFA_FMForeachExpression() {}
bool CXFA_FMForeachExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
javascript << L"{\n";
javascript << L"var ";
if (m_wsIdentifier[0] == L'!') {
WideString tempIdentifier =
EXCLAMATION_IN_IDENTIFIER +
m_wsIdentifier.Right(m_wsIdentifier.GetLength() - 1);
javascript << tempIdentifier;
} else {
javascript << m_wsIdentifier;
}
javascript << L" = null;\n";
javascript << L"var ";
javascript << RUNTIMEBLOCKTEMPARRAY;
javascript << L" = ";
javascript << XFA_FM_EXPTypeToString(CONCATFMOBJECT);
javascript << L"(";
for (const auto& expr : m_pAccessors) {
if (!expr->ToJavaScript(javascript))
return false;
if (expr != m_pAccessors.back())
javascript << L", ";
if (CFXA_IsTooBig(javascript))
return false;
}
javascript << L");\n";
javascript << L"var ";
javascript << RUNTIMEBLOCKTEMPARRAYINDEX;
javascript << (L" = 0;\n");
javascript << L"while(";
javascript << RUNTIMEBLOCKTEMPARRAYINDEX;
javascript << L" < ";
javascript << RUNTIMEBLOCKTEMPARRAY;
javascript << L".length)\n{\n";
if (m_wsIdentifier[0] == L'!') {
WideString tempIdentifier =
EXCLAMATION_IN_IDENTIFIER +
m_wsIdentifier.Right(m_wsIdentifier.GetLength() - 1);
javascript << tempIdentifier;
} else {
javascript << m_wsIdentifier;
}
javascript << L" = ";
javascript << RUNTIMEBLOCKTEMPARRAY;
javascript << L"[";
javascript << RUNTIMEBLOCKTEMPARRAYINDEX;
javascript << L"++];\n";
if (!m_pList->ToJavaScript(javascript))
return false;
javascript << L"}\n";
javascript << L"}\n";
return !CFXA_IsTooBig(javascript);
}
bool CXFA_FMForeachExpression::ToImpliedReturnJS(CFX_WideTextBuf& javascript) {
javascript << RUNTIMEFUNCTIONRETURNVALUE;
javascript << L" = 0;\n";
javascript << L"{\n";
javascript << L"var ";
if (m_wsIdentifier[0] == L'!') {
WideString tempIdentifier =
EXCLAMATION_IN_IDENTIFIER +
m_wsIdentifier.Right(m_wsIdentifier.GetLength() - 1);
javascript << tempIdentifier;
} else {
javascript << m_wsIdentifier;
}
javascript << L" = null;\n";
javascript << L"var ";
javascript << RUNTIMEBLOCKTEMPARRAY;
javascript << L" = ";
javascript << XFA_FM_EXPTypeToString(CONCATFMOBJECT);
javascript << L"(";
for (const auto& expr : m_pAccessors) {
if (!expr->ToJavaScript(javascript))
return false;
if (expr != m_pAccessors.back())
javascript << L", ";
if (CFXA_IsTooBig(javascript))
return false;
}
javascript << L");\n";
javascript << L"var ";
javascript << RUNTIMEBLOCKTEMPARRAYINDEX;
javascript << L" = 0;\n";
javascript << L"while(";
javascript << RUNTIMEBLOCKTEMPARRAYINDEX;
javascript << L" < ";
javascript << RUNTIMEBLOCKTEMPARRAY;
javascript << L".length)\n{\n";
if (m_wsIdentifier[0] == L'!') {
WideString tempIdentifier =
EXCLAMATION_IN_IDENTIFIER +
m_wsIdentifier.Right(m_wsIdentifier.GetLength() - 1);
javascript << tempIdentifier;
} else {
javascript << m_wsIdentifier;
}
javascript << L" = ";
javascript << RUNTIMEBLOCKTEMPARRAY;
javascript << L"[";
javascript << RUNTIMEBLOCKTEMPARRAYINDEX;
javascript << L"++];\n";
if (!m_pList->ToImpliedReturnJS(javascript))
return false;
javascript << L"}\n";
javascript << L"}\n";
return !CFXA_IsTooBig(javascript);
}