| // 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; |
| 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; |
| |
| std::unique_ptr<CPDF_Dest> dest( |
| new 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; |
| 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); |
| } |
