Splitting fpdfdoc/doc_* part II.

This splits the doc_ocg, doc_vt and doc_basic files into individual class files.

Review-Url: https://codereview.chromium.org/2187073005

1 files changed, 281 insertions, 0 deletions

diff --git a/core/fpdfdoc/cpdf_occontext.cpp b/core/fpdfdoc/cpdf_occontext.cpp
new file mode 100644
index 0000000000..9206b97e6f
--- /dev/null
+++ b/core/fpdfdoc/cpdf_occontext.cpp
@@ -0,0 +1,281 @@
+// Copyright 2016 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/fpdfdoc/include/cpdf_occontext.h"
+
+#include "core/fpdfapi/fpdf_page/cpdf_contentmarkdata.h"
+#include "core/fpdfapi/fpdf_page/include/cpdf_pageobject.h"
+#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
+#include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
+
+namespace {
+
+int32_t FindGroup(const CPDF_Array* pArray, const CPDF_Dictionary* pGroupDict) {
+  if (!pArray || !pGroupDict)
+    return -1;
+
+  for (size_t i = 0; i < pArray->GetCount(); i++) {
+    if (pArray->GetDictAt(i) == pGroupDict)
+      return i;
+  }
+  return -1;
+}
+
+bool HasIntent(const CPDF_Dictionary* pDict,
+               const CFX_ByteStringC& csElement,
+               const CFX_ByteStringC& csDef) {
+  CPDF_Object* pIntent = pDict->GetDirectObjectBy("Intent");
+  if (!pIntent)
+    return csElement == csDef;
+
+  CFX_ByteString bsIntent;
+  if (CPDF_Array* pArray = pIntent->AsArray()) {
+    for (size_t i = 0; i < pArray->GetCount(); i++) {
+      bsIntent = pArray->GetStringAt(i);
+      if (bsIntent == "All" || bsIntent == csElement)
+        return true;
+    }
+    return false;
+  }
+  bsIntent = pIntent->GetString();
+  return bsIntent == "All" || bsIntent == csElement;
+}
+
+CPDF_Dictionary* GetConfig(CPDF_Document* pDoc,
+                           const CPDF_Dictionary* pOCGDict) {
+  ASSERT(pOCGDict);
+  CPDF_Dictionary* pOCProperties = pDoc->GetRoot()->GetDictBy("OCProperties");
+  if (!pOCProperties)
+    return nullptr;
+
+  CPDF_Array* pOCGs = pOCProperties->GetArrayBy("OCGs");
+  if (!pOCGs)
+    return nullptr;
+
+  if (FindGroup(pOCGs, pOCGDict) < 0)
+    return nullptr;
+
+  CPDF_Dictionary* pConfig = pOCProperties->GetDictBy("D");
+  CPDF_Array* pConfigs = pOCProperties->GetArrayBy("Configs");
+  if (!pConfigs)
+    return pConfig;
+
+  for (size_t i = 0; i < pConfigs->GetCount(); i++) {
+    CPDF_Dictionary* pFind = pConfigs->GetDictAt(i);
+    if (pFind && HasIntent(pFind, "View", "View"))
+      return pFind;
+  }
+  return pConfig;
+}
+
+CFX_ByteString GetUsageTypeString(CPDF_OCContext::UsageType eType) {
+  CFX_ByteString csState;
+  switch (eType) {
+    case CPDF_OCContext::Design:
+      csState = "Design";
+      break;
+    case CPDF_OCContext::Print:
+      csState = "Print";
+      break;
+    case CPDF_OCContext::Export:
+      csState = "Export";
+      break;
+    default:
+      csState = "View";
+      break;
+  }
+  return csState;
+}
+
+}  // namespace
+
+CPDF_OCContext::CPDF_OCContext(CPDF_Document* pDoc, UsageType eUsageType)
+    : m_pDocument(pDoc), m_eUsageType(eUsageType) {
+  ASSERT(pDoc);
+}
+
+CPDF_OCContext::~CPDF_OCContext() {}
+
+bool CPDF_OCContext::LoadOCGStateFromConfig(
+    const CFX_ByteString& csConfig,
+    const CPDF_Dictionary* pOCGDict) const {
+  CPDF_Dictionary* pConfig = GetConfig(m_pDocument, pOCGDict);
+  if (!pConfig)
+    return true;
+
+  bool bState = pConfig->GetStringBy("BaseState", "ON") != "OFF";
+  CPDF_Array* pArray = pConfig->GetArrayBy("ON");
+  if (pArray) {
+    if (FindGroup(pArray, pOCGDict) >= 0)
+      bState = true;
+  }
+  pArray = pConfig->GetArrayBy("OFF");
+  if (pArray) {
+    if (FindGroup(pArray, pOCGDict) >= 0)
+      bState = false;
+  }
+  pArray = pConfig->GetArrayBy("AS");
+  if (!pArray)
+    return bState;
+
+  CFX_ByteString csFind = csConfig + "State";
+  for (size_t i = 0; i < pArray->GetCount(); i++) {
+    CPDF_Dictionary* pUsage = pArray->GetDictAt(i);
+    if (!pUsage)
+      continue;
+
+    if (pUsage->GetStringBy("Event", "View") != csConfig)
+      continue;
+
+    CPDF_Array* pOCGs = pUsage->GetArrayBy("OCGs");
+    if (!pOCGs)
+      continue;
+
+    if (FindGroup(pOCGs, pOCGDict) < 0)
+      continue;
+
+    CPDF_Dictionary* pState = pUsage->GetDictBy(csConfig);
+    if (!pState)
+      continue;
+
+    bState = pState->GetStringBy(csFind) != "OFF";
+  }
+  return bState;
+}
+
+bool CPDF_OCContext::LoadOCGState(const CPDF_Dictionary* pOCGDict) const {
+  if (!HasIntent(pOCGDict, "View", "View"))
+    return true;
+
+  CFX_ByteString csState = GetUsageTypeString(m_eUsageType);
+  CPDF_Dictionary* pUsage = pOCGDict->GetDictBy("Usage");
+  if (pUsage) {
+    CPDF_Dictionary* pState = pUsage->GetDictBy(csState);
+    if (pState) {
+      CFX_ByteString csFind = csState + "State";
+      if (pState->KeyExist(csFind))
+        return pState->GetStringBy(csFind) != "OFF";
+    }
+    if (csState != "View") {
+      pState = pUsage->GetDictBy("View");
+      if (pState && pState->KeyExist("ViewState"))
+        return pState->GetStringBy("ViewState") != "OFF";
+    }
+  }
+  return LoadOCGStateFromConfig(csState, pOCGDict);
+}
+
+bool CPDF_OCContext::GetOCGVisible(const CPDF_Dictionary* pOCGDict) {
+  if (!pOCGDict)
+    return false;
+
+  const auto it = m_OCGStates.find(pOCGDict);
+  if (it != m_OCGStates.end())
+    return it->second;
+
+  bool bState = LoadOCGState(pOCGDict);
+  m_OCGStates[pOCGDict] = bState;
+  return bState;
+}
+
+bool CPDF_OCContext::CheckObjectVisible(const CPDF_PageObject* pObj) {
+  const CPDF_ContentMarkData* pData = pObj->m_ContentMark.GetObject();
+  for (int i = 0; i < pData->CountItems(); i++) {
+    const CPDF_ContentMarkItem& item = pData->GetItem(i);
+    if (item.GetName() == "OC" &&
+        item.GetParamType() == CPDF_ContentMarkItem::PropertiesDict &&
+        !CheckOCGVisible(item.GetParam())) {
+      return false;
+    }
+  }
+  return true;
+}
+
+bool CPDF_OCContext::GetOCGVE(CPDF_Array* pExpression, int nLevel) {
+  if (nLevel > 32 || !pExpression)
+    return false;
+
+  CFX_ByteString csOperator = pExpression->GetStringAt(0);
+  if (csOperator == "Not") {
+    CPDF_Object* pOCGObj = pExpression->GetDirectObjectAt(1);
+    if (!pOCGObj)
+      return false;
+    if (CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
+      return !GetOCGVisible(pDict);
+    if (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->GetCount(); i++) {
+    CPDF_Object* pOCGObj = pExpression->GetDirectObjectAt(1);
+    if (!pOCGObj)
+      continue;
+
+    bool bItem = false;
+    if (CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
+      bItem = GetOCGVisible(pDict);
+    else if (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;
+}
+
+bool CPDF_OCContext::LoadOCMDState(const CPDF_Dictionary* pOCMDDict) {
+  CPDF_Array* pVE = pOCMDDict->GetArrayBy("VE");
+  if (pVE)
+    return GetOCGVE(pVE, 0);
+
+  CFX_ByteString csP = pOCMDDict->GetStringBy("P", "AnyOn");
+  CPDF_Object* pOCGObj = pOCMDDict->GetDirectObjectBy("OCGs");
+  if (!pOCGObj)
+    return true;
+
+  if (const CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
+    return GetOCGVisible(pDict);
+
+  CPDF_Array* pArray = pOCGObj->AsArray();
+  if (!pArray)
+    return true;
+
+  bool bState = (csP == "AllOn" || csP == "AllOff");
+  for (size_t i = 0; i < pArray->GetCount(); i++) {
+    bool bItem = true;
+    CPDF_Dictionary* pItemDict = pArray->GetDictAt(i);
+    if (pItemDict)
+      bItem = 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::CheckOCGVisible(const CPDF_Dictionary* pOCGDict) {
+  if (!pOCGDict)
+    return true;
+
+  CFX_ByteString csType = pOCGDict->GetStringBy("Type", "OCG");
+  if (csType == "OCG")
+    return GetOCGVisible(pOCGDict);
+  return LoadOCMDState(pOCGDict);
+}