1 files changed, 130 insertions, 0 deletions
diff --git a/core/fpdfapi/page/cpdf_clippath.cpp b/core/fpdfapi/page/cpdf_clippath.cpp
new file mode 100644
index 0000000000..8c268a1b5e
--- /dev/null
+++ b/core/fpdfapi/page/cpdf_clippath.cpp
@@ -0,0 +1,130 @@
+// 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_clippath.h"
+
+#include <utility>
+
+#include "core/fpdfapi/page/cpdf_path.h"
+#include "core/fpdfapi/page/cpdf_textobject.h"
+#include "third_party/base/stl_util.h"
+
+#define FPDF_CLIPPATH_MAX_TEXTS 1024
+
+CPDF_ClipPath::CPDF_ClipPath() {}
+
+CPDF_ClipPath::CPDF_ClipPath(const CPDF_ClipPath& that) : m_Ref(that.m_Ref) {}
+
+CPDF_ClipPath::~CPDF_ClipPath() {}
+
+uint32_t CPDF_ClipPath::GetPathCount() const {
+  return pdfium::CollectionSize<uint32_t>(m_Ref.GetObject()->m_PathAndTypeList);
+}
+
+CPDF_Path CPDF_ClipPath::GetPath(size_t i) const {
+  return m_Ref.GetObject()->m_PathAndTypeList[i].first;
+}
+
+uint8_t CPDF_ClipPath::GetClipType(size_t i) const {
+  return m_Ref.GetObject()->m_PathAndTypeList[i].second;
+}
+
+uint32_t CPDF_ClipPath::GetTextCount() const {
+  return pdfium::CollectionSize<uint32_t>(m_Ref.GetObject()->m_TextList);
+}
+
+CPDF_TextObject* CPDF_ClipPath::GetText(size_t i) const {
+  return m_Ref.GetObject()->m_TextList[i].get();
+}
+
+CFX_FloatRect CPDF_ClipPath::GetClipBox() const {
+  CFX_FloatRect rect;
+  FX_BOOL bStarted = FALSE;
+  int count = GetPathCount();
+  if (count) {
+    rect = GetPath(0).GetBoundingBox();
+    for (int i = 1; i < count; i++) {
+      CFX_FloatRect path_rect = GetPath(i).GetBoundingBox();
+      rect.Intersect(path_rect);
+    }
+    bStarted = TRUE;
+  }
+  count = GetTextCount();
+  if (count) {
+    CFX_FloatRect layer_rect;
+    FX_BOOL bLayerStarted = FALSE;
+    for (int i = 0; i < count; i++) {
+      CPDF_TextObject* pTextObj = GetText(i);
+      if (!pTextObj) {
+        if (!bStarted) {
+          rect = layer_rect;
+          bStarted = TRUE;
+        } else {
+          rect.Intersect(layer_rect);
+        }
+        bLayerStarted = FALSE;
+      } else {
+        if (!bLayerStarted) {
+          layer_rect = CFX_FloatRect(pTextObj->GetBBox(nullptr));
+          bLayerStarted = TRUE;
+        } else {
+          layer_rect.Union(CFX_FloatRect(pTextObj->GetBBox(nullptr)));
+        }
+      }
+    }
+  }
+  return rect;
+}
+
+void CPDF_ClipPath::AppendPath(CPDF_Path path, uint8_t type, bool bAutoMerge) {
+  PathData* pData = m_Ref.GetPrivateCopy();
+  if (!pData->m_PathAndTypeList.empty() && bAutoMerge) {
+    const CPDF_Path& old_path = pData->m_PathAndTypeList.back().first;
+    if (old_path.IsRect()) {
+      CFX_FloatRect old_rect(old_path.GetPointX(0), old_path.GetPointY(0),
+                             old_path.GetPointX(2), old_path.GetPointY(2));
+      CFX_FloatRect new_rect = path.GetBoundingBox();
+      if (old_rect.Contains(new_rect))
+        pData->m_PathAndTypeList.pop_back();
+    }
+  }
+  pData->m_PathAndTypeList.push_back(std::make_pair(path, type));
+}
+
+void CPDF_ClipPath::AppendTexts(
+    std::vector<std::unique_ptr<CPDF_TextObject>>* pTexts) {
+  PathData* pData = m_Ref.GetPrivateCopy();
+  if (pData->m_TextList.size() + pTexts->size() <= FPDF_CLIPPATH_MAX_TEXTS) {
+    for (size_t i = 0; i < pTexts->size(); i++)
+      pData->m_TextList.push_back(std::move((*pTexts)[i]));
+    pData->m_TextList.push_back(std::unique_ptr<CPDF_TextObject>());
+  }
+  pTexts->clear();
+}
+
+void CPDF_ClipPath::Transform(const CFX_Matrix& matrix) {
+  PathData* pData = m_Ref.GetPrivateCopy();
+  for (auto& obj : pData->m_PathAndTypeList)
+    obj.first.Transform(&matrix);
+  for (auto& text : pData->m_TextList) {
+    if (text)
+      text->Transform(matrix);
+  }
+}
+
+CPDF_ClipPath::PathData::PathData() {}
+
+CPDF_ClipPath::PathData::PathData(const PathData& that) {
+  m_PathAndTypeList = that.m_PathAndTypeList;
+
+  m_TextList.resize(that.m_TextList.size());
+  for (size_t i = 0; i < that.m_TextList.size(); ++i) {
+    if (that.m_TextList[i])
+      m_TextList[i].reset(that.m_TextList[i]->Clone());
+  }
+}
+
+CPDF_ClipPath::PathData::~PathData() {}