1 files changed, 77 insertions, 0 deletions
diff --git a/core/fpdfapi/page/cpdf_pageobjectholder.cpp b/core/fpdfapi/page/cpdf_pageobjectholder.cpp
new file mode 100644
index 0000000000..bd7830de4d
--- /dev/null
+++ b/core/fpdfapi/page/cpdf_pageobjectholder.cpp
@@ -0,0 +1,77 @@
+// 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/fpdfapi/page/cpdf_pageobjectholder.h"
+
+#include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h"
+#include "core/fpdfapi/page/cpdf_pageobject.h"
+#include "core/fpdfapi/page/pageint.h"
+
+CPDF_PageObjectHolder::CPDF_PageObjectHolder()
+    : m_pFormDict(nullptr),
+      m_pFormStream(nullptr),
+      m_pDocument(nullptr),
+      m_pPageResources(nullptr),
+      m_pResources(nullptr),
+      m_Transparency(0),
+      m_bBackgroundAlphaNeeded(FALSE),
+      m_bHasImageMask(FALSE),
+      m_ParseState(CONTENT_NOT_PARSED) {}
+
+CPDF_PageObjectHolder::~CPDF_PageObjectHolder() {}
+
+void CPDF_PageObjectHolder::ContinueParse(IFX_Pause* pPause) {
+  if (!m_pParser) {
+    return;
+  }
+  m_pParser->Continue(pPause);
+  if (m_pParser->GetStatus() == CPDF_ContentParser::Done) {
+    m_ParseState = CONTENT_PARSED;
+    m_pParser.reset();
+  }
+}
+
+void CPDF_PageObjectHolder::Transform(const CFX_Matrix& matrix) {
+  for (auto& pObj : m_PageObjectList)
+    pObj->Transform(matrix);
+}
+
+CFX_FloatRect CPDF_PageObjectHolder::CalcBoundingBox() const {
+  if (m_PageObjectList.empty())
+    return CFX_FloatRect(0, 0, 0, 0);
+
+  FX_FLOAT left = 1000000.0f;
+  FX_FLOAT right = -1000000.0f;
+  FX_FLOAT bottom = 1000000.0f;
+  FX_FLOAT top = -1000000.0f;
+  for (const auto& pObj : m_PageObjectList) {
+    left = std::min(left, pObj->m_Left);
+    right = std::max(right, pObj->m_Right);
+    bottom = std::min(bottom, pObj->m_Bottom);
+    top = std::max(top, pObj->m_Top);
+  }
+  return CFX_FloatRect(left, bottom, right, top);
+}
+
+void CPDF_PageObjectHolder::LoadTransInfo() {
+  if (!m_pFormDict) {
+    return;
+  }
+  CPDF_Dictionary* pGroup = m_pFormDict->GetDictFor("Group");
+  if (!pGroup) {
+    return;
+  }
+  if (pGroup->GetStringFor("S") != "Transparency") {
+    return;
+  }
+  m_Transparency |= PDFTRANS_GROUP;
+  if (pGroup->GetIntegerFor("I")) {
+    m_Transparency |= PDFTRANS_ISOLATED;
+  }
+  if (pGroup->GetIntegerFor("K")) {
+    m_Transparency |= PDFTRANS_KNOCKOUT;
+  }
+}