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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/fpdfapi/parser/cpdf_number.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/cpdfsdk_helpers.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 WideString& title,
std::set<const 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->GetDocument();
std::unique_ptr<CPDF_LinkList>* pHolder = pDoc->LinksContext();
if (!pHolder->get())
*pHolder = pdfium::MakeUnique<CPDF_LinkList>();
return pHolder->get();
}
} // namespace
FPDF_EXPORT FPDF_BOOKMARK FPDF_CALLCONV
FPDFBookmark_GetFirstChild(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return nullptr;
CPDF_BookmarkTree tree(pDoc);
CPDF_Bookmark bookmark(CPDFDictionaryFromFPDFBookmark(pDict));
return FPDFBookmarkFromCPDFDictionary(tree.GetFirstChild(bookmark).GetDict());
}
FPDF_EXPORT FPDF_BOOKMARK FPDF_CALLCONV
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(CPDFDictionaryFromFPDFBookmark(pDict));
return FPDFBookmarkFromCPDFDictionary(
tree.GetNextSibling(bookmark).GetDict());
}
FPDF_EXPORT unsigned long FPDF_CALLCONV
FPDFBookmark_GetTitle(FPDF_BOOKMARK pDict, void* buffer, unsigned long buflen) {
if (!pDict)
return 0;
CPDF_Bookmark bookmark(CPDFDictionaryFromFPDFBookmark(pDict));
WideString title = bookmark.GetTitle();
return Utf16EncodeMaybeCopyAndReturnLength(title, buffer, buflen);
}
FPDF_EXPORT FPDF_BOOKMARK FPDF_CALLCONV
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);
size_t len = WideString::WStringLength(title);
WideString encodedTitle = WideString::FromUTF16LE(title, len);
std::set<const CPDF_Dictionary*> visited;
return FPDFBookmarkFromCPDFDictionary(
FindBookmark(tree, CPDF_Bookmark(), encodedTitle, &visited).GetDict());
}
FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDFBookmark_GetDest(FPDF_DOCUMENT document,
FPDF_BOOKMARK pDict) {
if (!pDict)
return nullptr;
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return nullptr;
CPDF_Bookmark bookmark(CPDFDictionaryFromFPDFBookmark(pDict));
CPDF_Dest dest = bookmark.GetDest(pDoc);
if (dest.GetArray())
return FPDFDestFromCPDFArray(dest.GetArray());
// 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 FPDFDestFromCPDFArray(action.GetDest(pDoc).GetArray());
}
FPDF_EXPORT FPDF_ACTION FPDF_CALLCONV
FPDFBookmark_GetAction(FPDF_BOOKMARK pDict) {
if (!pDict)
return nullptr;
CPDF_Bookmark bookmark(CPDFDictionaryFromFPDFBookmark(pDict));
return FPDFActionFromCPDFDictionary(bookmark.GetAction().GetDict());
}
FPDF_EXPORT unsigned long FPDF_CALLCONV FPDFAction_GetType(FPDF_ACTION pDict) {
if (!pDict)
return PDFACTION_UNSUPPORTED;
CPDF_Action action(CPDFDictionaryFromFPDFAction(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;
}
}
FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDFAction_GetDest(FPDF_DOCUMENT document,
FPDF_ACTION pDict) {
if (!pDict)
return nullptr;
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return nullptr;
CPDF_Action action(CPDFDictionaryFromFPDFAction(pDict));
return FPDFDestFromCPDFArray(action.GetDest(pDoc).GetArray());
}
FPDF_EXPORT unsigned long FPDF_CALLCONV
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(CPDFDictionaryFromFPDFAction(pDict));
ByteString path = action.GetFilePath().UTF8Encode();
unsigned long len = path.GetLength() + 1;
if (buffer && len <= buflen)
memcpy(buffer, path.c_str(), len);
return len;
}
FPDF_EXPORT unsigned long FPDF_CALLCONV
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(CPDFDictionaryFromFPDFAction(pDict));
ByteString path = action.GetURI(pDoc);
unsigned long len = path.GetLength() + 1;
if (buffer && len <= buflen)
memcpy(buffer, path.c_str(), len);
return len;
}
FPDF_EXPORT int FPDF_CALLCONV FPDFDest_GetDestPageIndex(FPDF_DOCUMENT document,
FPDF_DEST dest) {
if (!dest)
return -1;
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return -1;
CPDF_Dest destination(CPDFArrayFromFPDFDest(dest));
return destination.GetDestPageIndex(pDoc);
}
FPDF_EXPORT unsigned long FPDF_CALLCONV
FPDFDest_GetView(FPDF_DEST pDict,
unsigned long* pNumParams,
FS_FLOAT* pParams) {
if (!pDict) {
*pNumParams = 0;
return 0;
}
CPDF_Dest destination(CPDFArrayFromFPDFDest(pDict));
unsigned long nParams = destination.GetNumParams();
ASSERT(nParams <= 4);
*pNumParams = nParams;
for (unsigned long i = 0; i < nParams; ++i)
pParams[i] = destination.GetParam(i);
return destination.GetZoomMode();
}
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
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>(CPDFArrayFromFPDFDest(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;
}
FPDF_EXPORT FPDF_LINK FPDF_CALLCONV 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;
CPDF_Link link = pLinkList->GetLinkAtPoint(
pPage, CFX_PointF(static_cast<float>(x), static_cast<float>(y)), nullptr);
return FPDFLinkFromCPDFDictionary(link.GetDict());
}
FPDF_EXPORT int FPDF_CALLCONV 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;
}
FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDFLink_GetDest(FPDF_DOCUMENT document,
FPDF_LINK pDict) {
if (!pDict)
return nullptr;
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return nullptr;
CPDF_Link link(CPDFDictionaryFromFPDFLink(pDict));
FPDF_DEST dest = FPDFDestFromCPDFArray(link.GetDest(pDoc).GetArray());
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 FPDFDestFromCPDFArray(action.GetDest(pDoc).GetArray());
}
FPDF_EXPORT FPDF_ACTION FPDF_CALLCONV FPDFLink_GetAction(FPDF_LINK pDict) {
if (!pDict)
return nullptr;
CPDF_Link link(CPDFDictionaryFromFPDFLink(pDict));
return FPDFActionFromCPDFDictionary(link.GetAction().GetDict());
}
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFLink_Enumerate(FPDF_PAGE page,
int* start_pos,
FPDF_LINK* link_annot) {
if (!start_pos || !link_annot)
return false;
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
if (!pPage || !pPage->GetDict())
return false;
CPDF_Array* pAnnots = pPage->GetDict()->GetArrayFor("Annots");
if (!pAnnots)
return false;
for (size_t i = *start_pos; i < pAnnots->GetCount(); i++) {
CPDF_Dictionary* pDict = ToDictionary(pAnnots->GetDirectObjectAt(i));
if (!pDict)
continue;
if (pDict->GetStringFor("Subtype") == "Link") {
*start_pos = static_cast<int>(i + 1);
*link_annot = FPDFLinkFromCPDFDictionary(pDict);
return true;
}
}
return false;
}
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFLink_GetAnnotRect(FPDF_LINK link_annot,
FS_RECTF* rect) {
if (!link_annot || !rect)
return false;
CPDF_Dictionary* pAnnotDict = CPDFDictionaryFromFPDFLink(link_annot);
FSRECTFFromCFXFloatRect(pAnnotDict->GetRectFor("Rect"), rect);
return true;
}
FPDF_EXPORT int FPDF_CALLCONV FPDFLink_CountQuadPoints(FPDF_LINK link_annot) {
const CPDF_Array* pArray =
GetQuadPointsArrayFromDictionary(CPDFDictionaryFromFPDFLink(link_annot));
return pArray ? static_cast<int>(pArray->GetCount() / 8) : 0;
}
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFLink_GetQuadPoints(FPDF_LINK link_annot,
int quad_index,
FS_QUADPOINTSF* quad_points) {
if (!quad_points || quad_index < 0)
return false;
CPDF_Dictionary* pLinkDict = CPDFDictionaryFromFPDFLink(link_annot);
if (!pLinkDict)
return false;
const CPDF_Array* pArray = GetQuadPointsArrayFromDictionary(pLinkDict);
if (!pArray)
return false;
return GetQuadPointsAtIndex(pArray, static_cast<size_t>(quad_index),
quad_points);
}
FPDF_EXPORT unsigned long FPDF_CALLCONV 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;
const CPDF_Dictionary* pInfo = pDoc->GetInfo();
if (!pInfo)
return 0;
WideString text = pInfo->GetUnicodeTextFor(tag);
return Utf16EncodeMaybeCopyAndReturnLength(text, buffer, buflen);
}
FPDF_EXPORT unsigned long FPDF_CALLCONV
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));
Optional<WideString> str = label.GetLabel(page_index);
return str.has_value()
? Utf16EncodeMaybeCopyAndReturnLength(str.value(), buffer, buflen)
: 0;
}