520 lines
17 KiB
C++
520 lines
17 KiB
C++
// Copyright 2014 The PDFium Authors
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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 <memory>
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#include <set>
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#include <utility>
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#include "constants/form_fields.h"
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#include "core/fpdfapi/page/cpdf_annotcontext.h"
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#include "core/fpdfapi/page/cpdf_page.h"
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#include "core/fpdfapi/parser/cpdf_array.h"
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#include "core/fpdfapi/parser/cpdf_dictionary.h"
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#include "core/fpdfapi/parser/cpdf_document.h"
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#include "core/fpdfapi/parser/cpdf_number.h"
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#include "core/fpdfapi/parser/cpdf_string.h"
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#include "core/fpdfapi/parser/fpdf_parser_decode.h"
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#include "core/fpdfdoc/cpdf_aaction.h"
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#include "core/fpdfdoc/cpdf_bookmark.h"
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#include "core/fpdfdoc/cpdf_bookmarktree.h"
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#include "core/fpdfdoc/cpdf_dest.h"
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#include "core/fpdfdoc/cpdf_linklist.h"
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#include "core/fpdfdoc/cpdf_pagelabel.h"
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#include "fpdfsdk/cpdfsdk_helpers.h"
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#include "public/fpdf_formfill.h"
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#include "third_party/base/check.h"
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#include "third_party/base/containers/contains.h"
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#include "third_party/base/numerics/safe_conversions.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 WideString& title,
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std::set<const CPDF_Dictionary*>* visited) {
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// Return if already checked to avoid circular calling.
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if (pdfium::Contains(*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::Contains(*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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CPDF_Document* pDoc = page->GetDocument();
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auto* pList = static_cast<CPDF_LinkList*>(pDoc->GetLinksContext());
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if (pList)
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return pList;
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auto pNewList = std::make_unique<CPDF_LinkList>();
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pList = pNewList.get();
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pDoc->SetLinksContext(std::move(pNewList));
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return pList;
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}
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} // namespace
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FPDF_EXPORT FPDF_BOOKMARK FPDF_CALLCONV
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FPDFBookmark_GetFirstChild(FPDF_DOCUMENT document, FPDF_BOOKMARK bookmark) {
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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 cBookmark(
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pdfium::WrapRetain(CPDFDictionaryFromFPDFBookmark(bookmark)));
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return FPDFBookmarkFromCPDFDictionary(
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tree.GetFirstChild(cBookmark).GetDict());
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}
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FPDF_EXPORT FPDF_BOOKMARK FPDF_CALLCONV
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FPDFBookmark_GetNextSibling(FPDF_DOCUMENT document, FPDF_BOOKMARK bookmark) {
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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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if (!bookmark)
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return nullptr;
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CPDF_BookmarkTree tree(pDoc);
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CPDF_Bookmark cBookmark(
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pdfium::WrapRetain(CPDFDictionaryFromFPDFBookmark(bookmark)));
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return FPDFBookmarkFromCPDFDictionary(
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tree.GetNextSibling(cBookmark).GetDict());
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}
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FPDF_EXPORT unsigned long FPDF_CALLCONV
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FPDFBookmark_GetTitle(FPDF_BOOKMARK bookmark,
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void* buffer,
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unsigned long buflen) {
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if (!bookmark)
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return 0;
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CPDF_Bookmark cBookmark(
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pdfium::WrapRetain(CPDFDictionaryFromFPDFBookmark(bookmark)));
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WideString title = cBookmark.GetTitle();
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return Utf16EncodeMaybeCopyAndReturnLength(title, buffer, buflen);
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}
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FPDF_EXPORT int FPDF_CALLCONV FPDFBookmark_GetCount(FPDF_BOOKMARK bookmark) {
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if (!bookmark)
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return 0;
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CPDF_Bookmark cBookmark(
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pdfium::WrapRetain(CPDFDictionaryFromFPDFBookmark(bookmark)));
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return cBookmark.GetCount();
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}
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FPDF_EXPORT FPDF_BOOKMARK FPDF_CALLCONV
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FPDFBookmark_Find(FPDF_DOCUMENT document, FPDF_WIDESTRING title) {
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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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WideString encodedTitle = WideStringFromFPDFWideString(title);
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if (encodedTitle.IsEmpty())
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return nullptr;
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CPDF_BookmarkTree tree(pDoc);
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std::set<const CPDF_Dictionary*> visited;
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return FPDFBookmarkFromCPDFDictionary(
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FindBookmark(tree, CPDF_Bookmark(), encodedTitle, &visited).GetDict());
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}
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FPDF_EXPORT FPDF_DEST FPDF_CALLCONV
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FPDFBookmark_GetDest(FPDF_DOCUMENT document, FPDF_BOOKMARK bookmark) {
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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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if (!bookmark)
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return nullptr;
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CPDF_Bookmark cBookmark(
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pdfium::WrapRetain(CPDFDictionaryFromFPDFBookmark(bookmark)));
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CPDF_Dest dest = cBookmark.GetDest(pDoc);
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if (dest.GetArray())
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return FPDFDestFromCPDFArray(dest.GetArray());
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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 = cBookmark.GetAction();
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if (!action.HasDict())
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return nullptr;
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return FPDFDestFromCPDFArray(action.GetDest(pDoc).GetArray());
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}
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FPDF_EXPORT FPDF_ACTION FPDF_CALLCONV
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FPDFBookmark_GetAction(FPDF_BOOKMARK bookmark) {
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if (!bookmark)
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return nullptr;
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CPDF_Bookmark cBookmark(
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pdfium::WrapRetain(CPDFDictionaryFromFPDFBookmark(bookmark)));
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return FPDFActionFromCPDFDictionary(cBookmark.GetAction().GetDict());
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}
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FPDF_EXPORT unsigned long FPDF_CALLCONV FPDFAction_GetType(FPDF_ACTION action) {
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if (!action)
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return PDFACTION_UNSUPPORTED;
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CPDF_Action cAction(pdfium::WrapRetain(CPDFDictionaryFromFPDFAction(action)));
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switch (cAction.GetType()) {
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case CPDF_Action::Type::kGoTo:
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return PDFACTION_GOTO;
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case CPDF_Action::Type::kGoToR:
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return PDFACTION_REMOTEGOTO;
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case CPDF_Action::Type::kGoToE:
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return PDFACTION_EMBEDDEDGOTO;
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case CPDF_Action::Type::kURI:
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return PDFACTION_URI;
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case CPDF_Action::Type::kLaunch:
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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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FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDFAction_GetDest(FPDF_DOCUMENT document,
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FPDF_ACTION action) {
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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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unsigned long type = FPDFAction_GetType(action);
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if (type != PDFACTION_GOTO && type != PDFACTION_REMOTEGOTO &&
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type != PDFACTION_EMBEDDEDGOTO) {
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return nullptr;
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}
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CPDF_Action cAction(pdfium::WrapRetain(CPDFDictionaryFromFPDFAction(action)));
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return FPDFDestFromCPDFArray(cAction.GetDest(pDoc).GetArray());
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}
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FPDF_EXPORT unsigned long FPDF_CALLCONV
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FPDFAction_GetFilePath(FPDF_ACTION action, void* buffer, unsigned long buflen) {
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unsigned long type = FPDFAction_GetType(action);
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if (type != PDFACTION_REMOTEGOTO && type != PDFACTION_EMBEDDEDGOTO &&
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type != PDFACTION_LAUNCH) {
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return 0;
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}
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CPDF_Action cAction(pdfium::WrapRetain(CPDFDictionaryFromFPDFAction(action)));
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ByteString path = cAction.GetFilePath().ToUTF8();
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return NulTerminateMaybeCopyAndReturnLength(path, buffer, buflen);
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}
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FPDF_EXPORT unsigned long FPDF_CALLCONV
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FPDFAction_GetURIPath(FPDF_DOCUMENT document,
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FPDF_ACTION action,
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void* buffer,
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unsigned long buflen) {
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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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unsigned long type = FPDFAction_GetType(action);
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if (type != PDFACTION_URI)
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return 0;
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CPDF_Action cAction(pdfium::WrapRetain(CPDFDictionaryFromFPDFAction(action)));
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ByteString path = cAction.GetURI(pDoc);
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const unsigned long len =
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pdfium::base::checked_cast<unsigned long>(path.GetLength() + 1);
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if (buffer && len <= buflen)
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memcpy(buffer, path.c_str(), len);
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return len;
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}
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FPDF_EXPORT int FPDF_CALLCONV FPDFDest_GetDestPageIndex(FPDF_DOCUMENT document,
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FPDF_DEST dest) {
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return -1;
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if (!dest)
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return -1;
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CPDF_Dest destination(pdfium::WrapRetain(CPDFArrayFromFPDFDest(dest)));
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return destination.GetDestPageIndex(pDoc);
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}
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FPDF_EXPORT unsigned long FPDF_CALLCONV
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FPDFDest_GetView(FPDF_DEST dest, unsigned long* pNumParams, FS_FLOAT* pParams) {
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if (!dest) {
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*pNumParams = 0;
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return 0;
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}
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CPDF_Dest destination(pdfium::WrapRetain(CPDFArrayFromFPDFDest(dest)));
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const unsigned long nParams =
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pdfium::base::checked_cast<unsigned long>(destination.GetNumParams());
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DCHECK(nParams <= 4);
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*pNumParams = nParams;
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for (unsigned long i = 0; i < nParams; ++i)
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pParams[i] = destination.GetParam(i);
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return destination.GetZoomMode();
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}
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FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
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FPDFDest_GetLocationInPage(FPDF_DEST dest,
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FPDF_BOOL* hasXVal,
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FPDF_BOOL* hasYVal,
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FPDF_BOOL* hasZoomVal,
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FS_FLOAT* x,
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FS_FLOAT* y,
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FS_FLOAT* zoom) {
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if (!dest)
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return false;
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CPDF_Dest destination(pdfium::WrapRetain(CPDFArrayFromFPDFDest(dest)));
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// FPDF_BOOL is an int, GetXYZ expects bools.
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bool bHasX;
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bool bHasY;
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bool bHasZoom;
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if (!destination.GetXYZ(&bHasX, &bHasY, &bHasZoom, x, y, zoom))
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return false;
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*hasXVal = bHasX;
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*hasYVal = bHasY;
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*hasZoomVal = bHasZoom;
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return true;
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}
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FPDF_EXPORT FPDF_LINK FPDF_CALLCONV 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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CPDF_Link link = pLinkList->GetLinkAtPoint(
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pPage, CFX_PointF(static_cast<float>(x), static_cast<float>(y)), nullptr);
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// Unretained reference in public API. NOLINTNEXTLINE
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return FPDFLinkFromCPDFDictionary(link.GetMutableDict());
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}
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FPDF_EXPORT int FPDF_CALLCONV 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(
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pPage, CFX_PointF(static_cast<float>(x), static_cast<float>(y)),
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&z_order);
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return z_order;
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}
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FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDFLink_GetDest(FPDF_DOCUMENT document,
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FPDF_LINK link) {
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if (!link)
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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 cLink(pdfium::WrapRetain(CPDFDictionaryFromFPDFLink(link)));
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FPDF_DEST dest = FPDFDestFromCPDFArray(cLink.GetDest(pDoc).GetArray());
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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 = cLink.GetAction();
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if (!action.HasDict())
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return nullptr;
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return FPDFDestFromCPDFArray(action.GetDest(pDoc).GetArray());
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}
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FPDF_EXPORT FPDF_ACTION FPDF_CALLCONV FPDFLink_GetAction(FPDF_LINK link) {
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if (!link)
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return nullptr;
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CPDF_Link cLink(pdfium::WrapRetain(CPDFDictionaryFromFPDFLink(link)));
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return FPDFActionFromCPDFDictionary(cLink.GetAction().GetDict());
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}
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FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFLink_Enumerate(FPDF_PAGE page,
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int* start_pos,
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FPDF_LINK* link_annot) {
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if (!start_pos || !link_annot)
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return false;
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
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if (!pPage)
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return false;
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RetainPtr<CPDF_Array> pAnnots = pPage->GetMutableAnnotsArray();
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if (!pAnnots)
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return false;
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for (size_t i = *start_pos; i < pAnnots->size(); i++) {
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RetainPtr<CPDF_Dictionary> pDict =
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ToDictionary(pAnnots->GetMutableDirectObjectAt(i));
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if (!pDict)
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continue;
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if (pDict->GetByteStringFor("Subtype") == "Link") {
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*start_pos = static_cast<int>(i + 1);
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*link_annot = FPDFLinkFromCPDFDictionary(pDict.Get());
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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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FPDF_EXPORT FPDF_ANNOTATION FPDF_CALLCONV
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FPDFLink_GetAnnot(FPDF_PAGE page, FPDF_LINK link_annot) {
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
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RetainPtr<CPDF_Dictionary> pAnnotDict(CPDFDictionaryFromFPDFLink(link_annot));
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if (!pPage || !pAnnotDict)
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return nullptr;
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auto pAnnotContext = std::make_unique<CPDF_AnnotContext>(
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std::move(pAnnotDict), IPDFPageFromFPDFPage(page));
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// Caller takes the ownership of the object.
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return FPDFAnnotationFromCPDFAnnotContext(pAnnotContext.release());
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}
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FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFLink_GetAnnotRect(FPDF_LINK link_annot,
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FS_RECTF* rect) {
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if (!link_annot || !rect)
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return false;
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CPDF_Dictionary* pAnnotDict = CPDFDictionaryFromFPDFLink(link_annot);
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*rect = FSRectFFromCFXFloatRect(pAnnotDict->GetRectFor("Rect"));
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return true;
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}
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FPDF_EXPORT int FPDF_CALLCONV FPDFLink_CountQuadPoints(FPDF_LINK link_annot) {
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RetainPtr<const CPDF_Array> pArray =
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GetQuadPointsArrayFromDictionary(CPDFDictionaryFromFPDFLink(link_annot));
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return pArray ? static_cast<int>(pArray->size() / 8) : 0;
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}
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FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
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FPDFLink_GetQuadPoints(FPDF_LINK link_annot,
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int quad_index,
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FS_QUADPOINTSF* quad_points) {
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if (!quad_points || quad_index < 0)
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return false;
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const CPDF_Dictionary* pLinkDict = CPDFDictionaryFromFPDFLink(link_annot);
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if (!pLinkDict)
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return false;
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RetainPtr<const CPDF_Array> pArray =
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GetQuadPointsArrayFromDictionary(pLinkDict);
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if (!pArray)
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return false;
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return GetQuadPointsAtIndex(std::move(pArray),
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static_cast<size_t>(quad_index), quad_points);
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}
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FPDF_EXPORT FPDF_ACTION FPDF_CALLCONV FPDF_GetPageAAction(FPDF_PAGE page,
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int aa_type) {
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CPDF_Page* pdf_page = CPDFPageFromFPDFPage(page);
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if (!pdf_page)
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return nullptr;
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CPDF_AAction aa(pdf_page->GetDict()->GetDictFor(pdfium::form_fields::kAA));
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CPDF_AAction::AActionType type;
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if (aa_type == FPDFPAGE_AACTION_OPEN)
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type = CPDF_AAction::kOpenPage;
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else if (aa_type == FPDFPAGE_AACTION_CLOSE)
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type = CPDF_AAction::kClosePage;
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else
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return nullptr;
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if (!aa.ActionExist(type))
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return nullptr;
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CPDF_Action action = aa.GetAction(type);
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return FPDFActionFromCPDFDictionary(action.GetDict());
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}
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FPDF_EXPORT unsigned long FPDF_CALLCONV
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FPDF_GetFileIdentifier(FPDF_DOCUMENT document,
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FPDF_FILEIDTYPE id_type,
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void* buffer,
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unsigned long buflen) {
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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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// Check if |id_type| is valid.
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if (id_type != FILEIDTYPE_PERMANENT && id_type != FILEIDTYPE_CHANGING)
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return 0;
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|
RetainPtr<const CPDF_Array> pFileId = pDoc->GetFileIdentifier();
|
|
if (!pFileId)
|
|
return 0;
|
|
|
|
size_t nIndex = id_type == FILEIDTYPE_PERMANENT ? 0 : 1;
|
|
RetainPtr<const CPDF_String> pValue =
|
|
ToString(pFileId->GetDirectObjectAt(nIndex));
|
|
if (!pValue)
|
|
return 0;
|
|
|
|
return NulTerminateMaybeCopyAndReturnLength(pValue->GetString(), buffer,
|
|
buflen);
|
|
}
|
|
|
|
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;
|
|
|
|
RetainPtr<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));
|
|
absl::optional<WideString> str = label.GetLabel(page_index);
|
|
return str.has_value()
|
|
? Utf16EncodeMaybeCopyAndReturnLength(str.value(), buffer, buflen)
|
|
: 0;
|
|
}
|