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// 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 <memory>
#include <set>
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfdoc/cpdf_bookmark.h"
#include "core/fpdfdoc/cpdf_bookmarktree.h"
#include "core/fpdfdoc/cpdf_dest.h"
#include "core/fpdfdoc/cpdf_pagelabel.h"
#include "fpdfsdk/fsdk_define.h"
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
namespace {
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();
}
CPDF_LinkList* GetLinkList(CPDF_Page* page) {
if (!page)
return nullptr;
CPDF_Document* pDoc = page->m_pDocument.Get();
std::unique_ptr<CPDF_LinkList>* pHolder = pDoc->LinksContext();
if (!pHolder->get())
*pHolder = pdfium::MakeUnique<CPDF_LinkList>();
return pHolder->get();
}
unsigned long Utf16EncodeMaybeCopyAndReturnLength(const CFX_WideString& text,
void* buffer,
unsigned long buflen) {
CFX_ByteString encodedText = text.UTF16LE_Encode();
unsigned long len = encodedText.GetLength();
if (buffer && len <= buflen)
memcpy(buffer, encodedText.c_str(), len);
return len;
}
} // 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();
return Utf16EncodeMaybeCopyAndReturnLength(title, buffer, buflen);
}
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 nullptr;
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 && len <= buflen)
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 && len <= buflen)
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_BOOL STDCALL FPDFDest_GetLocationInPage(FPDF_DEST pDict,
FPDF_BOOL* hasXVal,
FPDF_BOOL* hasYVal,
FPDF_BOOL* hasZoomVal,
FS_FLOAT* x,
FS_FLOAT* y,
FS_FLOAT* zoom) {
if (!pDict)
return false;
auto dest = pdfium::MakeUnique<CPDF_Dest>(static_cast<CPDF_Object*>(pDict));
// FPDF_BOOL is an int, GetXYZ expects bools.
bool bHasX;
bool bHasY;
bool bHasZoom;
if (!dest->GetXYZ(&bHasX, &bHasY, &bHasZoom, x, y, zoom))
return false;
*hasXVal = bHasX;
*hasYVal = bHasY;
*hasZoomVal = bHasZoom;
return true;
}
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,
CFX_PointF(static_cast<float>(x), static_cast<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, CFX_PointF(static_cast<float>(x), static_cast<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->GetArrayFor("Annots");
if (!pAnnots)
return false;
for (size_t i = *startPos; i < pAnnots->GetCount(); i++) {
CPDF_Dictionary* pDict =
ToDictionary(static_cast<CPDF_Object*>(pAnnots->GetDirectObjectAt(i)));
if (!pDict)
continue;
if (pDict->GetStringFor("Subtype") == "Link") {
*startPos = static_cast<int>(i + 1);
*linkAnnot = static_cast<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->GetRectFor("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->GetArrayFor("QuadPoints");
if (!pArray)
return 0;
return static_cast<int>(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->GetArrayFor("QuadPoints");
if (!pArray)
return false;
if (quadIndex < 0 ||
static_cast<size_t>(quadIndex) >= pArray->GetCount() / 8 ||
(static_cast<size_t>(quadIndex * 8 + 7) >= 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;
}
DLLEXPORT unsigned long STDCALL FPDF_GetMetaText(FPDF_DOCUMENT document,
FPDF_BYTESTRING tag,
void* buffer,
unsigned long buflen) {
if (!tag)
return 0;
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return 0;
pDoc->LoadDocumentInfo();
CPDF_Dictionary* pInfo = pDoc->GetInfo();
if (!pInfo)
return 0;
CFX_WideString text = pInfo->GetUnicodeTextFor(tag);
return Utf16EncodeMaybeCopyAndReturnLength(text, buffer, buflen);
}
DLLEXPORT unsigned long STDCALL FPDF_GetPageLabel(FPDF_DOCUMENT document,
int page_index,
void* buffer,
unsigned long buflen) {
if (page_index < 0)
return 0;
// CPDF_PageLabel can deal with NULL |document|.
CPDF_PageLabel label(CPDFDocumentFromFPDFDocument(document));
CFX_WideString str;
if (!label.GetLabel(page_index, &str))
return 0;
return Utf16EncodeMaybeCopyAndReturnLength(str, buffer, buflen);
}