diff options
Diffstat (limited to 'core/src/fpdfdoc/doc_ocg.cpp')
| -rw-r--r-- | core/src/fpdfdoc/doc_ocg.cpp | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/core/src/fpdfdoc/doc_ocg.cpp b/core/src/fpdfdoc/doc_ocg.cpp new file mode 100644 index 0000000000..39b8e37521 --- /dev/null +++ b/core/src/fpdfdoc/doc_ocg.cpp @@ -0,0 +1,300 @@ +// 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 "../../include/fpdfdoc/fpdf_doc.h"
+static FX_INT32 FPDFDOC_OCG_FindGroup(const CPDF_Object *pObject, const CPDF_Dictionary *pGroupDict)
+{
+ if (pObject == NULL || pGroupDict == NULL) {
+ return -1;
+ }
+ FX_INT32 iType = pObject->GetType();
+ if (iType == PDFOBJ_ARRAY) {
+ FX_DWORD dwCount = ((CPDF_Array*)pObject)->GetCount();
+ for (FX_DWORD i = 0; i < dwCount; i++) {
+ if (((CPDF_Array*)pObject)->GetDict(i) == pGroupDict) {
+ return i;
+ }
+ }
+ return -1;
+ }
+ if (pObject->GetDict() == pGroupDict) {
+ return 0;
+ }
+ return -1;
+}
+static FX_BOOL FPDFDOC_OCG_HasIntent(const CPDF_Dictionary *pDict, FX_BSTR csElement, FX_BSTR csDef = FX_BSTRC(""))
+{
+ FXSYS_assert(pDict != NULL);
+ CPDF_Object *pIntent = pDict->GetElementValue(FX_BSTRC("Intent"));
+ if (pIntent == NULL) {
+ return csElement == csDef;
+ }
+ CFX_ByteString bsIntent;
+ if (pIntent->GetType() == PDFOBJ_ARRAY) {
+ FX_DWORD dwCount = ((CPDF_Array*)pIntent)->GetCount();
+ for (FX_DWORD i = 0; i < dwCount; i++) {
+ bsIntent = ((CPDF_Array*)pIntent)->GetString(i);
+ if (bsIntent == FX_BSTRC("All") || bsIntent == csElement) {
+ return TRUE;
+ }
+ }
+ return FALSE;
+ }
+ bsIntent = pIntent->GetString();
+ return bsIntent == FX_BSTRC("All") || bsIntent == csElement;
+}
+static CPDF_Dictionary* FPDFDOC_OCG_GetConfig(CPDF_Document *pDoc, const CPDF_Dictionary *pOCGDict, FX_BSTR bsState)
+{
+ FXSYS_assert(pDoc && pOCGDict);
+ CPDF_Dictionary *pOCProperties = pDoc->GetRoot()->GetDict(FX_BSTRC("OCProperties"));
+ if (!pOCProperties) {
+ return NULL;
+ }
+ CPDF_Array *pOCGs = pOCProperties->GetArray(FX_BSTRC("OCGs"));
+ if (!pOCGs) {
+ return NULL;
+ }
+ if (FPDFDOC_OCG_FindGroup(pOCGs, pOCGDict) < 0) {
+ return NULL;
+ }
+ CPDF_Dictionary *pConfig = pOCProperties->GetDict(FX_BSTRC("D"));
+ CPDF_Array *pConfigs = pOCProperties->GetArray(FX_BSTRC("Configs"));
+ if (pConfigs) {
+ CPDF_Dictionary *pFind;
+ FX_INT32 iCount = pConfigs->GetCount();
+ for (FX_INT32 i = 0; i < iCount; i ++) {
+ pFind = pConfigs->GetDict(i);
+ if (!pFind) {
+ continue;
+ }
+ if (!FPDFDOC_OCG_HasIntent(pFind, FX_BSTRC("View"), FX_BSTRC("View"))) {
+ continue;
+ }
+ pConfig = pFind;
+ break;
+ }
+ }
+ return pConfig;
+}
+static CFX_ByteString FPDFDOC_OCG_GetUsageTypeString(CPDF_OCContext::UsageType eType)
+{
+ CFX_ByteString csState = FX_BSTRC("View");
+ if (eType == CPDF_OCContext::Design) {
+ csState = FX_BSTRC("Design");
+ } else if (eType == CPDF_OCContext::Print) {
+ csState = FX_BSTRC("Print");
+ } else if (eType == CPDF_OCContext::Export) {
+ csState = FX_BSTRC("Export");
+ }
+ return csState;
+}
+CPDF_OCContext::CPDF_OCContext(CPDF_Document *pDoc, UsageType eUsageType)
+{
+ FXSYS_assert(pDoc != NULL);
+ m_pDocument = pDoc;
+ m_eUsageType = eUsageType;
+}
+CPDF_OCContext::~CPDF_OCContext()
+{
+ m_OCGStates.RemoveAll();
+}
+FX_BOOL CPDF_OCContext::LoadOCGStateFromConfig(FX_BSTR csConfig, const CPDF_Dictionary *pOCGDict, FX_BOOL &bValidConfig) const
+{
+ CPDF_Dictionary *pConfig = FPDFDOC_OCG_GetConfig(m_pDocument, pOCGDict, csConfig);
+ if (!pConfig) {
+ return TRUE;
+ }
+ bValidConfig = TRUE;
+ FX_BOOL bState = pConfig->GetString(FX_BSTRC("BaseState"), FX_BSTRC("ON")) != FX_BSTRC("OFF");
+ CPDF_Array *pArray = pConfig->GetArray(FX_BSTRC("ON"));
+ if (pArray) {
+ if (FPDFDOC_OCG_FindGroup(pArray, pOCGDict) >= 0) {
+ bState = TRUE;
+ }
+ }
+ pArray = pConfig->GetArray(FX_BSTRC("OFF"));
+ if (pArray) {
+ if (FPDFDOC_OCG_FindGroup(pArray, pOCGDict) >= 0) {
+ bState = FALSE;
+ }
+ }
+ pArray = pConfig->GetArray(FX_BSTRC("AS"));
+ if (pArray) {
+ CFX_ByteString csFind = csConfig + FX_BSTRC("State");
+ FX_INT32 iCount = pArray->GetCount();
+ for (FX_INT32 i = 0; i < iCount; i ++) {
+ CPDF_Dictionary *pUsage = pArray->GetDict(i);
+ if (!pUsage) {
+ continue;
+ }
+ if (pUsage->GetString(FX_BSTRC("Event"), FX_BSTRC("View")) != csConfig) {
+ continue;
+ }
+ CPDF_Array *pOCGs = pUsage->GetArray(FX_BSTRC("OCGs"));
+ if (!pOCGs) {
+ continue;
+ }
+ if (FPDFDOC_OCG_FindGroup(pOCGs, pOCGDict) < 0) {
+ continue;
+ }
+ CPDF_Dictionary *pState = pUsage->GetDict(csConfig);
+ if (!pState) {
+ continue;
+ }
+ bState = pState->GetString(csFind) != FX_BSTRC("OFF");
+ }
+ }
+ return bState;
+}
+FX_BOOL CPDF_OCContext::LoadOCGState(const CPDF_Dictionary *pOCGDict) const
+{
+ if (!FPDFDOC_OCG_HasIntent(pOCGDict, FX_BSTRC("View"), FX_BSTRC("View"))) {
+ return TRUE;
+ }
+ CFX_ByteString csState = FPDFDOC_OCG_GetUsageTypeString(m_eUsageType);
+ CPDF_Dictionary *pUsage = pOCGDict->GetDict(FX_BSTRC("Usage"));
+ if (pUsage) {
+ CPDF_Dictionary *pState = pUsage->GetDict(csState);
+ if (pState) {
+ CFX_ByteString csFind = csState + FX_BSTRC("State");
+ if (pState->KeyExist(csFind)) {
+ return pState->GetString(csFind) != FX_BSTRC("OFF");
+ }
+ }
+ if (csState != FX_BSTRC("View")) {
+ pState = pUsage->GetDict(FX_BSTRC("View"));
+ if (pState && pState->KeyExist(FX_BSTRC("ViewState"))) {
+ return pState->GetString(FX_BSTRC("ViewState")) != FX_BSTRC("OFF");
+ }
+ }
+ }
+ FX_BOOL bDefValid = FALSE;
+ return LoadOCGStateFromConfig(csState, pOCGDict, bDefValid);
+}
+FX_BOOL CPDF_OCContext::GetOCGVisible(const CPDF_Dictionary *pOCGDict)
+{
+ if (!pOCGDict) {
+ return FALSE;
+ }
+ FX_LPVOID bState = NULL;
+ if (m_OCGStates.Lookup(pOCGDict, bState)) {
+ return (FX_UINTPTR)bState != 0;
+ }
+ bState = (FX_LPVOID)(FX_UINTPTR)LoadOCGState(pOCGDict);
+ m_OCGStates.SetAt(pOCGDict, bState);
+ return (FX_UINTPTR)bState != 0;
+}
+FX_BOOL CPDF_OCContext::GetOCGVE(CPDF_Array *pExpression, FX_BOOL bFromConfig, int nLevel)
+{
+ if (nLevel > 32) {
+ return FALSE;
+ }
+ if (pExpression == NULL) {
+ return FALSE;
+ }
+ FX_INT32 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));
+ } else if (pOCGObj->GetType() == PDFOBJ_ARRAY) {
+ return !GetOCGVE((CPDF_Array*)pOCGObj, bFromConfig, nLevel + 1);
+ } else {
+ return FALSE;
+ }
+ }
+ if (csOperator == FX_BSTRC("Or") || csOperator == FX_BSTRC("And")) {
+ FX_BOOL bValue = FALSE;
+ for (FX_INT32 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::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;
+ }
+ FX_INT32 iCount = ((CPDF_Array*)pOCGObj)->GetCount();
+ for (FX_INT32 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;
+}
+FX_BOOL CPDF_OCContext::CheckOCGVisible(const CPDF_Dictionary *pOCGDict)
+{
+ if (pOCGDict == NULL) {
+ return TRUE;
+ }
+ CFX_ByteString csType = pOCGDict->GetString(FX_BSTRC("Type"), FX_BSTRC("OCG"));
+ if (csType == FX_BSTRC("OCG")) {
+ return GetOCGVisible(pOCGDict);
+ } else {
+ return LoadOCMDState(pOCGDict, FALSE);
+ }
+}
+void CPDF_OCContext::ResetOCContext()
+{
+ m_OCGStates.RemoveAll();
+}
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