// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "public/fpdf_doc.h"
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#include <set>
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#include "core/fpdfapi/fpdf_page/include/cpdf_page.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
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#include "fpdfsdk/include/fsdk_define.h"
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#include "third_party/base/stl_util.h"
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namespace {
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CPDF_Bookmark FindBookmark(const CPDF_BookmarkTree& tree,
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CPDF_Bookmark bookmark,
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const CFX_WideString& title,
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std::set<CPDF_Dictionary*>* visited) {
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// Return if already checked to avoid circular calling.
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if (pdfium::ContainsKey(*visited, bookmark.GetDict()))
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return CPDF_Bookmark();
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visited->insert(bookmark.GetDict());
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if (bookmark.GetDict() &&
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bookmark.GetTitle().CompareNoCase(title.c_str()) == 0) {
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// First check this item.
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return bookmark;
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}
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// Go into children items.
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CPDF_Bookmark child = tree.GetFirstChild(bookmark);
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while (child.GetDict() && !pdfium::ContainsKey(*visited, child.GetDict())) {
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// Check this item and its children.
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CPDF_Bookmark found = FindBookmark(tree, child, title, visited);
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if (found.GetDict())
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return found;
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child = tree.GetNextSibling(child);
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}
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return CPDF_Bookmark();
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}
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CPDF_LinkList* GetLinkList(CPDF_Page* page) {
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if (!page)
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return nullptr;
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CPDF_Document* pDoc = page->m_pDocument;
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std::unique_ptr<CPDF_LinkList>* pHolder = pDoc->LinksContext();
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if (!pHolder->get())
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pHolder->reset(new CPDF_LinkList);
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return pHolder->get();
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}
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} // namespace
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DLLEXPORT FPDF_BOOKMARK STDCALL
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FPDFBookmark_GetFirstChild(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict) {
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return nullptr;
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CPDF_BookmarkTree tree(pDoc);
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CPDF_Bookmark bookmark =
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CPDF_Bookmark(ToDictionary(static_cast<CPDF_Object*>(pDict)));
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return tree.GetFirstChild(bookmark).GetDict();
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}
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DLLEXPORT FPDF_BOOKMARK STDCALL
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FPDFBookmark_GetNextSibling(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict) {
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if (!pDict)
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return nullptr;
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return nullptr;
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CPDF_BookmarkTree tree(pDoc);
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CPDF_Bookmark bookmark =
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CPDF_Bookmark(ToDictionary(static_cast<CPDF_Object*>(pDict)));
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return tree.GetNextSibling(bookmark).GetDict();
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}
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DLLEXPORT unsigned long STDCALL FPDFBookmark_GetTitle(FPDF_BOOKMARK pDict,
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void* buffer,
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unsigned long buflen) {
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if (!pDict)
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return 0;
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CPDF_Bookmark bookmark(ToDictionary(static_cast<CPDF_Object*>(pDict)));
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CFX_WideString title = bookmark.GetTitle();
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CFX_ByteString encodedTitle = title.UTF16LE_Encode();
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unsigned long len = encodedTitle.GetLength();
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if (buffer && buflen >= len) {
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FXSYS_memcpy(buffer, encodedTitle.c_str(), len);
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}
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return len;
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}
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DLLEXPORT FPDF_BOOKMARK STDCALL FPDFBookmark_Find(FPDF_DOCUMENT document,
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FPDF_WIDESTRING title) {
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if (!title || title[0] == 0)
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return nullptr;
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return nullptr;
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CPDF_BookmarkTree tree(pDoc);
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FX_STRSIZE len = CFX_WideString::WStringLength(title);
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CFX_WideString encodedTitle = CFX_WideString::FromUTF16LE(title, len);
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std::set<CPDF_Dictionary*> visited;
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return FindBookmark(tree, CPDF_Bookmark(), encodedTitle, &visited).GetDict();
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}
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DLLEXPORT FPDF_DEST STDCALL FPDFBookmark_GetDest(FPDF_DOCUMENT document,
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FPDF_BOOKMARK pDict) {
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if (!pDict)
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return nullptr;
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return nullptr;
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CPDF_Bookmark bookmark(ToDictionary(static_cast<CPDF_Object*>(pDict)));
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CPDF_Dest dest = bookmark.GetDest(pDoc);
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if (dest.GetObject())
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return dest.GetObject();
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// If this bookmark is not directly associated with a dest, we try to get
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// action
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CPDF_Action action = bookmark.GetAction();
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if (!action.GetDict())
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return nullptr;
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return action.GetDest(pDoc).GetObject();
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}
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DLLEXPORT FPDF_ACTION STDCALL FPDFBookmark_GetAction(FPDF_BOOKMARK pDict) {
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if (!pDict)
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return nullptr;
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CPDF_Bookmark bookmark(ToDictionary(static_cast<CPDF_Object*>(pDict)));
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return bookmark.GetAction().GetDict();
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}
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DLLEXPORT unsigned long STDCALL FPDFAction_GetType(FPDF_ACTION pDict) {
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if (!pDict)
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return PDFACTION_UNSUPPORTED;
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CPDF_Action action(ToDictionary(static_cast<CPDF_Object*>(pDict)));
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CPDF_Action::ActionType type = action.GetType();
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switch (type) {
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case CPDF_Action::GoTo:
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return PDFACTION_GOTO;
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case CPDF_Action::GoToR:
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return PDFACTION_REMOTEGOTO;
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case CPDF_Action::URI:
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return PDFACTION_URI;
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case CPDF_Action::Launch:
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return PDFACTION_LAUNCH;
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default:
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return PDFACTION_UNSUPPORTED;
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}
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}
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DLLEXPORT FPDF_DEST STDCALL FPDFAction_GetDest(FPDF_DOCUMENT document,
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FPDF_ACTION pDict) {
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if (!pDict)
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return nullptr;
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return nullptr;
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CPDF_Action action(ToDictionary(static_cast<CPDF_Object*>(pDict)));
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return action.GetDest(pDoc).GetObject();
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}
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DLLEXPORT unsigned long STDCALL FPDFAction_GetFilePath(FPDF_ACTION pDict,
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void* buffer,
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unsigned long buflen) {
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unsigned long type = FPDFAction_GetType(pDict);
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if (type != PDFACTION_REMOTEGOTO && type != PDFACTION_LAUNCH)
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return 0;
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CPDF_Action action(ToDictionary(static_cast<CPDF_Object*>(pDict)));
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CFX_ByteString path = action.GetFilePath().UTF8Encode();
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unsigned long len = path.GetLength() + 1;
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if (buffer && buflen >= len)
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FXSYS_memcpy(buffer, path.c_str(), len);
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return len;
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}
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DLLEXPORT unsigned long STDCALL FPDFAction_GetURIPath(FPDF_DOCUMENT document,
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FPDF_ACTION pDict,
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void* buffer,
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unsigned long buflen) {
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if (!pDict)
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return 0;
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return 0;
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CPDF_Action action(ToDictionary(static_cast<CPDF_Object*>(pDict)));
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CFX_ByteString path = action.GetURI(pDoc);
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unsigned long len = path.GetLength() + 1;
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if (buffer && buflen >= len)
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FXSYS_memcpy(buffer, path.c_str(), len);
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return len;
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}
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DLLEXPORT unsigned long STDCALL FPDFDest_GetPageIndex(FPDF_DOCUMENT document,
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FPDF_DEST pDict) {
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if (!pDict)
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return 0;
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return 0;
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CPDF_Dest dest(static_cast<CPDF_Array*>(pDict));
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return dest.GetPageIndex(pDoc);
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}
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DLLEXPORT FPDF_LINK STDCALL FPDFLink_GetLinkAtPoint(FPDF_PAGE page,
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double x,
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double y) {
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
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if (!pPage)
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return nullptr;
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CPDF_LinkList* pLinkList = GetLinkList(pPage);
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if (!pLinkList)
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return nullptr;
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return pLinkList->GetLinkAtPoint(pPage, (FX_FLOAT)x, (FX_FLOAT)y, nullptr)
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.GetDict();
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}
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DLLEXPORT int STDCALL FPDFLink_GetLinkZOrderAtPoint(FPDF_PAGE page,
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double x,
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double y) {
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
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if (!pPage)
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return -1;
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CPDF_LinkList* pLinkList = GetLinkList(pPage);
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if (!pLinkList)
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return -1;
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int z_order = -1;
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pLinkList->GetLinkAtPoint(pPage, (FX_FLOAT)x, (FX_FLOAT)y, &z_order);
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return z_order;
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}
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DLLEXPORT FPDF_DEST STDCALL FPDFLink_GetDest(FPDF_DOCUMENT document,
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FPDF_LINK pDict) {
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if (!pDict)
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return nullptr;
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return nullptr;
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CPDF_Link link(ToDictionary(static_cast<CPDF_Object*>(pDict)));
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FPDF_DEST dest = link.GetDest(pDoc).GetObject();
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if (dest)
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return dest;
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// If this link is not directly associated with a dest, we try to get action
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CPDF_Action action = link.GetAction();
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if (!action.GetDict())
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return nullptr;
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return action.GetDest(pDoc).GetObject();
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}
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DLLEXPORT FPDF_ACTION STDCALL FPDFLink_GetAction(FPDF_LINK pDict) {
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if (!pDict)
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return nullptr;
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CPDF_Link link(ToDictionary(static_cast<CPDF_Object*>(pDict)));
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return link.GetAction().GetDict();
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}
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DLLEXPORT FPDF_BOOL STDCALL FPDFLink_Enumerate(FPDF_PAGE page,
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int* startPos,
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FPDF_LINK* linkAnnot) {
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if (!startPos || !linkAnnot)
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return FALSE;
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
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if (!pPage || !pPage->m_pFormDict)
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return FALSE;
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CPDF_Array* pAnnots = pPage->m_pFormDict->GetArrayBy("Annots");
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if (!pAnnots)
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return FALSE;
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for (size_t i = *startPos; i < pAnnots->GetCount(); i++) {
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CPDF_Dictionary* pDict =
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ToDictionary(static_cast<CPDF_Object*>(pAnnots->GetDirectObjectAt(i)));
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if (!pDict)
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continue;
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if (pDict->GetStringBy("Subtype") == "Link") {
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*startPos = static_cast<int>(i + 1);
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*linkAnnot = static_cast<FPDF_LINK>(pDict);
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return TRUE;
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}
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}
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return FALSE;
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}
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DLLEXPORT FPDF_BOOL STDCALL FPDFLink_GetAnnotRect(FPDF_LINK linkAnnot,
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FS_RECTF* rect) {
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if (!linkAnnot || !rect)
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return FALSE;
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CPDF_Dictionary* pAnnotDict =
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ToDictionary(static_cast<CPDF_Object*>(linkAnnot));
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CFX_FloatRect rt = pAnnotDict->GetRectBy("Rect");
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rect->left = rt.left;
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rect->bottom = rt.bottom;
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rect->right = rt.right;
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rect->top = rt.top;
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return TRUE;
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}
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DLLEXPORT int STDCALL FPDFLink_CountQuadPoints(FPDF_LINK linkAnnot) {
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if (!linkAnnot)
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return 0;
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CPDF_Dictionary* pAnnotDict =
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ToDictionary(static_cast<CPDF_Object*>(linkAnnot));
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CPDF_Array* pArray = pAnnotDict->GetArrayBy("QuadPoints");
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if (!pArray)
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return 0;
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return static_cast<int>(pArray->GetCount() / 8);
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}
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DLLEXPORT FPDF_BOOL STDCALL FPDFLink_GetQuadPoints(FPDF_LINK linkAnnot,
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int quadIndex,
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FS_QUADPOINTSF* quadPoints) {
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if (!linkAnnot || !quadPoints)
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return FALSE;
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CPDF_Dictionary* pAnnotDict =
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ToDictionary(static_cast<CPDF_Object*>(linkAnnot));
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CPDF_Array* pArray = pAnnotDict->GetArrayBy("QuadPoints");
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if (pArray) {
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if (quadIndex < 0 ||
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static_cast<size_t>(quadIndex) >= pArray->GetCount() / 8 ||
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(static_cast<size_t>(quadIndex * 8 + 7) >= pArray->GetCount()))
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return FALSE;
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quadPoints->x1 = pArray->GetNumberAt(quadIndex * 8);
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quadPoints->y1 = pArray->GetNumberAt(quadIndex * 8 + 1);
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quadPoints->x2 = pArray->GetNumberAt(quadIndex * 8 + 2);
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quadPoints->y2 = pArray->GetNumberAt(quadIndex * 8 + 3);
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quadPoints->x3 = pArray->GetNumberAt(quadIndex * 8 + 4);
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quadPoints->y3 = pArray->GetNumberAt(quadIndex * 8 + 5);
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quadPoints->x4 = pArray->GetNumberAt(quadIndex * 8 + 6);
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quadPoints->y4 = pArray->GetNumberAt(quadIndex * 8 + 7);
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return TRUE;
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}
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return FALSE;
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}
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DLLEXPORT unsigned long STDCALL FPDF_GetMetaText(FPDF_DOCUMENT doc,
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FPDF_BYTESTRING tag,
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void* buffer,
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unsigned long buflen) {
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if (!tag)
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return 0;
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(doc);
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if (!pDoc)
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return 0;
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CPDF_Dictionary* pInfo = pDoc->GetInfo();
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if (!pInfo)
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return 0;
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CFX_WideString text = pInfo->GetUnicodeTextBy(tag);
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// Use UTF-16LE encoding
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CFX_ByteString encodedText = text.UTF16LE_Encode();
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unsigned long len = encodedText.GetLength();
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if (buffer && buflen >= len) {
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FXSYS_memcpy(buffer, encodedText.c_str(), len);
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}
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return len;
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}
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