FX_BOOL CPDF_OCContext::GetOCGVE(CPDF_Array* pExpression,
FX_BOOL bFromConfig,
int nLevel) {
if (nLevel > 32) {
return FALSE;
}
if (pExpression == NULL) {
return FALSE;
}
int32_t iCount = pExpression->GetCount();
CPDF_Object* pOCGObj;
CFX_ByteString csOperator = pExpression->GetString(0);
if (csOperator == FX_BSTRC("Not")) {
pOCGObj = pExpression->GetElementValue(1);
if (pOCGObj == NULL) {
return FALSE;
}
if (pOCGObj->GetType() == PDFOBJ_DICTIONARY) {
return !(bFromConfig ? LoadOCGState((CPDF_Dictionary*)pOCGObj)
: GetOCGVisible((CPDF_Dictionary*)pOCGObj));
}
if (pOCGObj->GetType() == PDFOBJ_ARRAY) {
return !GetOCGVE((CPDF_Array*)pOCGObj, bFromConfig, nLevel + 1);
}
return FALSE;
}
if (csOperator == FX_BSTRC("Or") || csOperator == FX_BSTRC("And")) {
FX_BOOL bValue = FALSE;
for (int32_t i = 1; i < iCount; i++) {
pOCGObj = pExpression->GetElementValue(1);
if (pOCGObj == NULL) {
continue;
}
FX_BOOL bItem = FALSE;
if (pOCGObj->GetType() == PDFOBJ_DICTIONARY) {
bItem = bFromConfig ? LoadOCGState((CPDF_Dictionary*)pOCGObj)
: GetOCGVisible((CPDF_Dictionary*)pOCGObj);
} else if (pOCGObj->GetType() == PDFOBJ_ARRAY) {
bItem = GetOCGVE((CPDF_Array*)pOCGObj, bFromConfig, nLevel + 1);
}
if (i == 1) {
bValue = bItem;
} else {
if (csOperator == FX_BSTRC("Or")) {
bValue = bValue || bItem;
} else {
bValue = bValue && bItem;
}
}
}
return bValue;
}
return FALSE;
}
FX_BOOL CPDF_OCContext::GetOCGVE(CPDF_Array* pExpression,
FX_BOOL bFromConfig,
int nLevel) {
if (nLevel > 32) {
return FALSE;
}
if (!pExpression) {
return FALSE;
}
int32_t iCount = pExpression->GetCount();
CPDF_Object* pOCGObj;
CFX_ByteString csOperator = pExpression->GetStringAt(0);
if (csOperator == "Not") {
pOCGObj = pExpression->GetElementValue(1);
if (!pOCGObj)
return FALSE;
if (CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
return !(bFromConfig ? LoadOCGState(pDict) : GetOCGVisible(pDict));
if (CPDF_Array* pArray = pOCGObj->AsArray())
return !GetOCGVE(pArray, bFromConfig, nLevel + 1);
return FALSE;
}
if (csOperator == "Or" || csOperator == "And") {
FX_BOOL bValue = FALSE;
for (int32_t i = 1; i < iCount; i++) {
pOCGObj = pExpression->GetElementValue(1);
if (!pOCGObj) {
continue;
}
FX_BOOL bItem = FALSE;
if (CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
bItem = bFromConfig ? LoadOCGState(pDict) : GetOCGVisible(pDict);
else if (CPDF_Array* pArray = pOCGObj->AsArray())
bItem = GetOCGVE(pArray, bFromConfig, nLevel + 1);
if (i == 1) {
bValue = bItem;
} else {
if (csOperator == "Or") {
bValue = bValue || bItem;
} else {
bValue = bValue && bItem;
}
}
}
return bValue;
}
return FALSE;
}
FX_BOOL CPDF_OCContext::LoadOCMDState(const CPDF_Dictionary* pOCMDDict,
FX_BOOL bFromConfig) {
CPDF_Array* pVE = pOCMDDict->GetArrayBy("VE");
if (pVE) {
return GetOCGVE(pVE, bFromConfig);
}
CFX_ByteString csP = pOCMDDict->GetStringBy("P", "AnyOn");
CPDF_Object* pOCGObj = pOCMDDict->GetElementValue("OCGs");
if (!pOCGObj)
return TRUE;
if (const CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
return bFromConfig ? LoadOCGState(pDict) : GetOCGVisible(pDict);
CPDF_Array* pArray = pOCGObj->AsArray();
if (!pArray)
return TRUE;
FX_BOOL bState = FALSE;
if (csP == "AllOn" || csP == "AllOff") {
bState = TRUE;
}
int32_t iCount = pArray->GetCount();
for (int32_t i = 0; i < iCount; i++) {
FX_BOOL bItem = TRUE;
CPDF_Dictionary* pItemDict = pArray->GetDictAt(i);
if (pItemDict)
bItem = bFromConfig ? LoadOCGState(pItemDict) : GetOCGVisible(pItemDict);
if ((csP == "AnyOn" && bItem) || (csP == "AnyOff" && !bItem))
return TRUE;
if ((csP == "AllOn" && !bItem) || (csP == "AllOff" && bItem))
return FALSE;
}
return bState;
}
bool CPDF_OCContext::GetOCGVE(const CPDF_Array* pExpression, int nLevel) const {
if (nLevel > 32 || !pExpression)
return false;
ByteString csOperator = pExpression->GetStringAt(0);
if (csOperator == "Not") {
const CPDF_Object* pOCGObj = pExpression->GetDirectObjectAt(1);
if (!pOCGObj)
return false;
if (const CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
return !GetOCGVisible(pDict);
if (const CPDF_Array* pArray = pOCGObj->AsArray())
return !GetOCGVE(pArray, nLevel + 1);
return false;
}
if (csOperator != "Or" && csOperator != "And")
return false;
bool bValue = false;
for (size_t i = 1; i < pExpression->size(); i++) {
const CPDF_Object* pOCGObj = pExpression->GetDirectObjectAt(1);
if (!pOCGObj)
continue;
bool bItem = false;
if (const CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
bItem = GetOCGVisible(pDict);
else if (const CPDF_Array* pArray = pOCGObj->AsArray())
bItem = GetOCGVE(pArray, nLevel + 1);
if (i == 1) {
bValue = bItem;
} else {
if (csOperator == "Or") {
bValue = bValue || bItem;
} else {
bValue = bValue && bItem;
}
}
}
return bValue;
}
FX_BOOL CPDF_OCContext::LoadOCMDState(const CPDF_Dictionary* pOCMDDict,
FX_BOOL bFromConfig) {
FXSYS_assert(pOCMDDict != NULL);
CPDF_Array* pVE = pOCMDDict->GetArray(FX_BSTRC("VE"));
if (pVE != NULL) {
return GetOCGVE(pVE, bFromConfig);
}
CFX_ByteString csP = pOCMDDict->GetString(FX_BSTRC("P"), FX_BSTRC("AnyOn"));
CPDF_Object* pOCGObj = pOCMDDict->GetElementValue(FX_BSTRC("OCGs"));
if (pOCGObj == NULL) {
return TRUE;
}
if (pOCGObj->GetType() == PDFOBJ_DICTIONARY) {
return bFromConfig ? LoadOCGState((CPDF_Dictionary*)pOCGObj)
: GetOCGVisible((CPDF_Dictionary*)pOCGObj);
}
if (pOCGObj->GetType() != PDFOBJ_ARRAY) {
return TRUE;
}
FX_BOOL bState = FALSE;
if (csP == FX_BSTRC("AllOn") || csP == FX_BSTRC("AllOff")) {
bState = TRUE;
}
int32_t iCount = ((CPDF_Array*)pOCGObj)->GetCount();
for (int32_t i = 0; i < iCount; i++) {
FX_BOOL bItem = TRUE;
CPDF_Dictionary* pItemDict = ((CPDF_Array*)pOCGObj)->GetDict(i);
if (pItemDict) {
bItem = bFromConfig ? LoadOCGState(pItemDict) : GetOCGVisible(pItemDict);
}
if (csP == FX_BSTRC("AnyOn") && bItem) {
return TRUE;
}
if (csP == FX_BSTRC("AnyOff") && !bItem) {
return TRUE;
}
if (csP == FX_BSTRC("AllOn") && !bItem) {
return FALSE;
}
if (csP == FX_BSTRC("AllOff") && bItem) {
return FALSE;
}
}
return bState;
}
bool CPDF_OCContext::LoadOCMDState(const CPDF_Dictionary* pOCMDDict) const {
const CPDF_Array* pVE = pOCMDDict->GetArrayFor("VE");
if (pVE)
return GetOCGVE(pVE, 0);
ByteString csP = pOCMDDict->GetStringFor("P", "AnyOn");
const CPDF_Object* pOCGObj = pOCMDDict->GetDirectObjectFor("OCGs");
if (!pOCGObj)
return true;
if (const CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
return GetOCGVisible(pDict);
const CPDF_Array* pArray = pOCGObj->AsArray();
if (!pArray)
return true;
bool bState = (csP == "AllOn" || csP == "AllOff");
// At least one entry of OCGs needs to be a valid dictionary for it to be
// considered present. See "OCGs" in table 4.49 in the PDF 1.7 spec.
bool bValidEntrySeen = false;
for (size_t i = 0; i < pArray->size(); i++) {
bool bItem = true;
const CPDF_Dictionary* pItemDict = pArray->GetDictAt(i);
if (!pItemDict)
continue;
bValidEntrySeen = true;
bItem = GetOCGVisible(pItemDict);
if ((csP == "AnyOn" && bItem) || (csP == "AnyOff" && !bItem))
return true;
if ((csP == "AllOn" && !bItem) || (csP == "AllOff" && bItem))
return false;
}
return !bValidEntrySeen || bState;
}
