Move fpdfsdk/src up to fpdfsdk/.

This CL moves the files in fpdfsdk/src/ up one level to fpdfsdk/ and fixes
up the include paths, include guards and build files.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1799773002 .
diff --git a/fpdfsdk/fpdfdoc.cpp b/fpdfsdk/fpdfdoc.cpp
new file mode 100644
index 0000000..9fa9f4f
--- /dev/null
+++ b/fpdfsdk/fpdfdoc.cpp
@@ -0,0 +1,372 @@
+// 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 "public/fpdf_doc.h"
+
+#include <set>
+
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "fpdfsdk/include/fsdk_define.h"
+#include "third_party/base/stl_util.h"
+
+namespace {
+
+int THISMODULE = 0;
+
+CPDF_Bookmark FindBookmark(const CPDF_BookmarkTree& tree,
+                           CPDF_Bookmark bookmark,
+                           const CFX_WideString& title,
+                           std::set<CPDF_Dictionary*>* visited) {
+  // Return if already checked to avoid circular calling.
+  if (pdfium::ContainsKey(*visited, bookmark.GetDict()))
+    return CPDF_Bookmark();
+  visited->insert(bookmark.GetDict());
+
+  if (bookmark.GetDict() &&
+      bookmark.GetTitle().CompareNoCase(title.c_str()) == 0) {
+    // First check this item.
+    return bookmark;
+  }
+
+  // Go into children items.
+  CPDF_Bookmark child = tree.GetFirstChild(bookmark);
+  while (child.GetDict() && !pdfium::ContainsKey(*visited, child.GetDict())) {
+    // Check this item and its children.
+    CPDF_Bookmark found = FindBookmark(tree, child, title, visited);
+    if (found.GetDict())
+      return found;
+    child = tree.GetNextSibling(child);
+  }
+  return CPDF_Bookmark();
+}
+
+void ReleaseLinkList(void* data) {
+  delete (CPDF_LinkList*)data;
+}
+
+CPDF_LinkList* GetLinkList(CPDF_Page* page) {
+  if (!page)
+    return nullptr;
+
+  // Link list is stored with the document
+  CPDF_Document* pDoc = page->m_pDocument;
+  CPDF_LinkList* pLinkList = (CPDF_LinkList*)pDoc->GetPrivateData(&THISMODULE);
+  if (!pLinkList) {
+    pLinkList = new CPDF_LinkList;
+    pDoc->SetPrivateData(&THISMODULE, pLinkList, ReleaseLinkList);
+  }
+  return pLinkList;
+}
+
+}  // namespace
+
+DLLEXPORT FPDF_BOOKMARK STDCALL
+FPDFBookmark_GetFirstChild(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict) {
+  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
+  if (!pDoc)
+    return nullptr;
+  CPDF_BookmarkTree tree(pDoc);
+  CPDF_Bookmark bookmark =
+      CPDF_Bookmark(ToDictionary(static_cast<CPDF_Object*>(pDict)));
+  return tree.GetFirstChild(bookmark).GetDict();
+}
+
+DLLEXPORT FPDF_BOOKMARK STDCALL
+FPDFBookmark_GetNextSibling(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict) {
+  if (!pDict)
+    return nullptr;
+  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
+  if (!pDoc)
+    return nullptr;
+  CPDF_BookmarkTree tree(pDoc);
+  CPDF_Bookmark bookmark =
+      CPDF_Bookmark(ToDictionary(static_cast<CPDF_Object*>(pDict)));
+  return tree.GetNextSibling(bookmark).GetDict();
+}
+
+DLLEXPORT unsigned long STDCALL FPDFBookmark_GetTitle(FPDF_BOOKMARK pDict,
+                                                      void* buffer,
+                                                      unsigned long buflen) {
+  if (!pDict)
+    return 0;
+  CPDF_Bookmark bookmark(ToDictionary(static_cast<CPDF_Object*>(pDict)));
+  CFX_WideString title = bookmark.GetTitle();
+  CFX_ByteString encodedTitle = title.UTF16LE_Encode();
+  unsigned long len = encodedTitle.GetLength();
+  if (buffer && buflen >= len) {
+    FXSYS_memcpy(buffer, encodedTitle.c_str(), len);
+  }
+  return len;
+}
+
+DLLEXPORT FPDF_BOOKMARK STDCALL FPDFBookmark_Find(FPDF_DOCUMENT document,
+                                                  FPDF_WIDESTRING title) {
+  if (!title || title[0] == 0)
+    return nullptr;
+  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
+  if (!pDoc)
+    return nullptr;
+  CPDF_BookmarkTree tree(pDoc);
+  FX_STRSIZE len = CFX_WideString::WStringLength(title);
+  CFX_WideString encodedTitle = CFX_WideString::FromUTF16LE(title, len);
+  std::set<CPDF_Dictionary*> visited;
+  return FindBookmark(tree, CPDF_Bookmark(), encodedTitle, &visited).GetDict();
+}
+
+DLLEXPORT FPDF_DEST STDCALL FPDFBookmark_GetDest(FPDF_DOCUMENT document,
+                                                 FPDF_BOOKMARK pDict) {
+  if (!pDict)
+    return nullptr;
+  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
+  if (!pDoc)
+    return nullptr;
+  CPDF_Bookmark bookmark(ToDictionary(static_cast<CPDF_Object*>(pDict)));
+  CPDF_Dest dest = bookmark.GetDest(pDoc);
+  if (dest.GetObject())
+    return dest.GetObject();
+  // If this bookmark is not directly associated with a dest, we try to get
+  // action
+  CPDF_Action action = bookmark.GetAction();
+  if (!action.GetDict())
+    return nullptr;
+  return action.GetDest(pDoc).GetObject();
+}
+
+DLLEXPORT FPDF_ACTION STDCALL FPDFBookmark_GetAction(FPDF_BOOKMARK pDict) {
+  if (!pDict)
+    return NULL;
+  CPDF_Bookmark bookmark(ToDictionary(static_cast<CPDF_Object*>(pDict)));
+  return bookmark.GetAction().GetDict();
+}
+
+DLLEXPORT unsigned long STDCALL FPDFAction_GetType(FPDF_ACTION pDict) {
+  if (!pDict)
+    return PDFACTION_UNSUPPORTED;
+
+  CPDF_Action action(ToDictionary(static_cast<CPDF_Object*>(pDict)));
+  CPDF_Action::ActionType type = action.GetType();
+  switch (type) {
+    case CPDF_Action::GoTo:
+      return PDFACTION_GOTO;
+    case CPDF_Action::GoToR:
+      return PDFACTION_REMOTEGOTO;
+    case CPDF_Action::URI:
+      return PDFACTION_URI;
+    case CPDF_Action::Launch:
+      return PDFACTION_LAUNCH;
+    default:
+      return PDFACTION_UNSUPPORTED;
+  }
+}
+
+DLLEXPORT FPDF_DEST STDCALL FPDFAction_GetDest(FPDF_DOCUMENT document,
+                                               FPDF_ACTION pDict) {
+  if (!pDict)
+    return nullptr;
+  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
+  if (!pDoc)
+    return nullptr;
+  CPDF_Action action(ToDictionary(static_cast<CPDF_Object*>(pDict)));
+  return action.GetDest(pDoc).GetObject();
+}
+
+DLLEXPORT unsigned long STDCALL FPDFAction_GetFilePath(FPDF_ACTION pDict,
+                                                       void* buffer,
+                                                       unsigned long buflen) {
+  unsigned long type = FPDFAction_GetType(pDict);
+  if (type != PDFACTION_REMOTEGOTO && type != PDFACTION_LAUNCH)
+    return 0;
+
+  CPDF_Action action(ToDictionary(static_cast<CPDF_Object*>(pDict)));
+  CFX_ByteString path = action.GetFilePath().UTF8Encode();
+  unsigned long len = path.GetLength() + 1;
+  if (buffer && buflen >= len)
+    FXSYS_memcpy(buffer, path.c_str(), len);
+  return len;
+}
+
+DLLEXPORT unsigned long STDCALL FPDFAction_GetURIPath(FPDF_DOCUMENT document,
+                                                      FPDF_ACTION pDict,
+                                                      void* buffer,
+                                                      unsigned long buflen) {
+  if (!pDict)
+    return 0;
+  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
+  if (!pDoc)
+    return 0;
+  CPDF_Action action(ToDictionary(static_cast<CPDF_Object*>(pDict)));
+  CFX_ByteString path = action.GetURI(pDoc);
+  unsigned long len = path.GetLength() + 1;
+  if (buffer && buflen >= len)
+    FXSYS_memcpy(buffer, path.c_str(), len);
+  return len;
+}
+
+DLLEXPORT unsigned long STDCALL FPDFDest_GetPageIndex(FPDF_DOCUMENT document,
+                                                      FPDF_DEST pDict) {
+  if (!pDict)
+    return 0;
+  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
+  if (!pDoc)
+    return 0;
+  CPDF_Dest dest(static_cast<CPDF_Array*>(pDict));
+  return dest.GetPageIndex(pDoc);
+}
+
+DLLEXPORT FPDF_LINK STDCALL FPDFLink_GetLinkAtPoint(FPDF_PAGE page,
+                                                    double x,
+                                                    double y) {
+  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
+  if (!pPage)
+    return nullptr;
+
+  CPDF_LinkList* pLinkList = GetLinkList(pPage);
+  if (!pLinkList)
+    return nullptr;
+
+  return pLinkList->GetLinkAtPoint(pPage, (FX_FLOAT)x, (FX_FLOAT)y, nullptr)
+      .GetDict();
+}
+
+DLLEXPORT int STDCALL FPDFLink_GetLinkZOrderAtPoint(FPDF_PAGE page,
+                                                    double x,
+                                                    double y) {
+  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
+  if (!pPage)
+    return -1;
+
+  CPDF_LinkList* pLinkList = GetLinkList(pPage);
+  if (!pLinkList)
+    return -1;
+
+  int z_order = -1;
+  pLinkList->GetLinkAtPoint(pPage, (FX_FLOAT)x, (FX_FLOAT)y, &z_order);
+  return z_order;
+}
+
+DLLEXPORT FPDF_DEST STDCALL FPDFLink_GetDest(FPDF_DOCUMENT document,
+                                             FPDF_LINK pDict) {
+  if (!pDict)
+    return nullptr;
+  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
+  if (!pDoc)
+    return nullptr;
+  CPDF_Link link(ToDictionary(static_cast<CPDF_Object*>(pDict)));
+  FPDF_DEST dest = link.GetDest(pDoc).GetObject();
+  if (dest)
+    return dest;
+  // If this link is not directly associated with a dest, we try to get action
+  CPDF_Action action = link.GetAction();
+  if (!action.GetDict())
+    return nullptr;
+  return action.GetDest(pDoc).GetObject();
+}
+
+DLLEXPORT FPDF_ACTION STDCALL FPDFLink_GetAction(FPDF_LINK pDict) {
+  if (!pDict)
+    return nullptr;
+
+  CPDF_Link link(ToDictionary(static_cast<CPDF_Object*>(pDict)));
+  return link.GetAction().GetDict();
+}
+
+DLLEXPORT FPDF_BOOL STDCALL FPDFLink_Enumerate(FPDF_PAGE page,
+                                               int* startPos,
+                                               FPDF_LINK* linkAnnot) {
+  if (!startPos || !linkAnnot)
+    return FALSE;
+  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
+  if (!pPage || !pPage->m_pFormDict)
+    return FALSE;
+  CPDF_Array* pAnnots = pPage->m_pFormDict->GetArrayBy("Annots");
+  if (!pAnnots)
+    return FALSE;
+  for (int i = *startPos; i < (int)pAnnots->GetCount(); i++) {
+    CPDF_Dictionary* pDict =
+        ToDictionary(static_cast<CPDF_Object*>(pAnnots->GetElementValue(i)));
+    if (!pDict)
+      continue;
+    if (pDict->GetStringBy("Subtype").Equal("Link")) {
+      *startPos = i + 1;
+      *linkAnnot = (FPDF_LINK)pDict;
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+
+DLLEXPORT FPDF_BOOL STDCALL FPDFLink_GetAnnotRect(FPDF_LINK linkAnnot,
+                                                  FS_RECTF* rect) {
+  if (!linkAnnot || !rect)
+    return FALSE;
+  CPDF_Dictionary* pAnnotDict =
+      ToDictionary(static_cast<CPDF_Object*>(linkAnnot));
+  CFX_FloatRect rt = pAnnotDict->GetRectBy("Rect");
+  rect->left = rt.left;
+  rect->bottom = rt.bottom;
+  rect->right = rt.right;
+  rect->top = rt.top;
+  return TRUE;
+}
+
+DLLEXPORT int STDCALL FPDFLink_CountQuadPoints(FPDF_LINK linkAnnot) {
+  if (!linkAnnot)
+    return 0;
+  CPDF_Dictionary* pAnnotDict =
+      ToDictionary(static_cast<CPDF_Object*>(linkAnnot));
+  CPDF_Array* pArray = pAnnotDict->GetArrayBy("QuadPoints");
+  if (!pArray)
+    return 0;
+  return pArray->GetCount() / 8;
+}
+
+DLLEXPORT FPDF_BOOL STDCALL FPDFLink_GetQuadPoints(FPDF_LINK linkAnnot,
+                                                   int quadIndex,
+                                                   FS_QUADPOINTSF* quadPoints) {
+  if (!linkAnnot || !quadPoints)
+    return FALSE;
+  CPDF_Dictionary* pAnnotDict =
+      ToDictionary(static_cast<CPDF_Object*>(linkAnnot));
+  CPDF_Array* pArray = pAnnotDict->GetArrayBy("QuadPoints");
+  if (pArray) {
+    if (quadIndex < 0 || quadIndex >= (int)pArray->GetCount() / 8 ||
+        ((quadIndex * 8 + 7) >= (int)pArray->GetCount()))
+      return FALSE;
+    quadPoints->x1 = pArray->GetNumberAt(quadIndex * 8);
+    quadPoints->y1 = pArray->GetNumberAt(quadIndex * 8 + 1);
+    quadPoints->x2 = pArray->GetNumberAt(quadIndex * 8 + 2);
+    quadPoints->y2 = pArray->GetNumberAt(quadIndex * 8 + 3);
+    quadPoints->x3 = pArray->GetNumberAt(quadIndex * 8 + 4);
+    quadPoints->y3 = pArray->GetNumberAt(quadIndex * 8 + 5);
+    quadPoints->x4 = pArray->GetNumberAt(quadIndex * 8 + 6);
+    quadPoints->y4 = pArray->GetNumberAt(quadIndex * 8 + 7);
+    return TRUE;
+  }
+  return FALSE;
+}
+
+DLLEXPORT unsigned long STDCALL FPDF_GetMetaText(FPDF_DOCUMENT doc,
+                                                 FPDF_BYTESTRING tag,
+                                                 void* buffer,
+                                                 unsigned long buflen) {
+  if (!tag)
+    return 0;
+  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(doc);
+  if (!pDoc)
+    return 0;
+  CPDF_Dictionary* pInfo = pDoc->GetInfo();
+  if (!pInfo)
+    return 0;
+  CFX_WideString text = pInfo->GetUnicodeTextBy(tag);
+  // Use UTF-16LE encoding
+  CFX_ByteString encodedText = text.UTF16LE_Encode();
+  unsigned long len = encodedText.GetLength();
+  if (buffer && buflen >= len) {
+    FXSYS_memcpy(buffer, encodedText.c_str(), len);
+  }
+  return len;
+}