// 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_edit.h" #include <algorithm> #include <memory> #include <utility> #include "core/fpdfapi/edit/cpdf_pagecontentgenerator.h" #include "core/fpdfapi/page/cpdf_form.h" #include "core/fpdfapi/page/cpdf_formobject.h" #include "core/fpdfapi/page/cpdf_imageobject.h" #include "core/fpdfapi/page/cpdf_page.h" #include "core/fpdfapi/page/cpdf_pageobject.h" #include "core/fpdfapi/page/cpdf_pathobject.h" #include "core/fpdfapi/page/cpdf_shadingobject.h" #include "core/fpdfapi/parser/cpdf_array.h" #include "core/fpdfapi/parser/cpdf_document.h" #include "core/fpdfapi/parser/cpdf_number.h" #include "core/fpdfapi/parser/cpdf_string.h" #include "core/fpdfdoc/cpdf_annot.h" #include "core/fpdfdoc/cpdf_annotlist.h" #include "fpdfsdk/fsdk_define.h" #include "public/fpdf_formfill.h" #include "third_party/base/stl_util.h" #ifdef PDF_ENABLE_XFA #include "fpdfsdk/fpdfxfa/cpdfxfa_context.h" #include "fpdfsdk/fpdfxfa/cpdfxfa_page.h" #endif // PDF_ENABLE_XFA #if _FX_OS_ == _FX_ANDROID_ #include <time.h> #else #include <ctime> #endif namespace { static_assert(FPDF_PAGEOBJ_TEXT == CPDF_PageObject::TEXT, "FPDF_PAGEOBJ_TEXT/CPDF_PageObject::TEXT mismatch"); static_assert(FPDF_PAGEOBJ_PATH == CPDF_PageObject::PATH, "FPDF_PAGEOBJ_PATH/CPDF_PageObject::PATH mismatch"); static_assert(FPDF_PAGEOBJ_IMAGE == CPDF_PageObject::IMAGE, "FPDF_PAGEOBJ_IMAGE/CPDF_PageObject::IMAGE mismatch"); static_assert(FPDF_PAGEOBJ_SHADING == CPDF_PageObject::SHADING, "FPDF_PAGEOBJ_SHADING/CPDF_PageObject::SHADING mismatch"); static_assert(FPDF_PAGEOBJ_FORM == CPDF_PageObject::FORM, "FPDF_PAGEOBJ_FORM/CPDF_PageObject::FORM mismatch"); bool IsPageObject(CPDF_Page* pPage) { if (!pPage || !pPage->m_pFormDict || !pPage->m_pFormDict->KeyExist("Type")) return false; CPDF_Object* pObject = pPage->m_pFormDict->GetObjectFor("Type")->GetDirect(); return pObject && !pObject->GetString().Compare("Page"); } } // namespace DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_CreateNewDocument() { CPDF_Document* pDoc = new CPDF_Document(nullptr); pDoc->CreateNewDoc(); time_t currentTime; CFX_ByteString DateStr; if (FSDK_IsSandBoxPolicyEnabled(FPDF_POLICY_MACHINETIME_ACCESS)) { if (-1 != time(¤tTime)) { tm* pTM = localtime(¤tTime); if (pTM) { DateStr.Format("D:%04d%02d%02d%02d%02d%02d", pTM->tm_year + 1900, pTM->tm_mon + 1, pTM->tm_mday, pTM->tm_hour, pTM->tm_min, pTM->tm_sec); } } } CPDF_Dictionary* pInfoDict = nullptr; pInfoDict = pDoc->GetInfo(); if (pInfoDict) { if (FSDK_IsSandBoxPolicyEnabled(FPDF_POLICY_MACHINETIME_ACCESS)) pInfoDict->SetNewFor<CPDF_String>("CreationDate", DateStr, false); pInfoDict->SetNewFor<CPDF_String>("Creator", L"PDFium"); } return FPDFDocumentFromCPDFDocument(pDoc); } DLLEXPORT void STDCALL FPDFPage_Delete(FPDF_DOCUMENT document, int page_index) { if (UnderlyingDocumentType* pDoc = UnderlyingFromFPDFDocument(document)) pDoc->DeletePage(page_index); } DLLEXPORT FPDF_PAGE STDCALL FPDFPage_New(FPDF_DOCUMENT document, int page_index, double width, double height) { CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); if (!pDoc) return nullptr; page_index = std::min(std::max(page_index, 0), pDoc->GetPageCount()); CPDF_Dictionary* pPageDict = pDoc->CreateNewPage(page_index); if (!pPageDict) return nullptr; CPDF_Array* pMediaBoxArray = pPageDict->SetNewFor<CPDF_Array>("MediaBox"); pMediaBoxArray->AddNew<CPDF_Number>(0); pMediaBoxArray->AddNew<CPDF_Number>(0); pMediaBoxArray->AddNew<CPDF_Number>(static_cast<FX_FLOAT>(width)); pMediaBoxArray->AddNew<CPDF_Number>(static_cast<FX_FLOAT>(height)); pPageDict->SetNewFor<CPDF_Number>("Rotate", 0); pPageDict->SetNewFor<CPDF_Dictionary>("Resources"); #ifdef PDF_ENABLE_XFA CPDFXFA_Page* pPage = new CPDFXFA_Page(static_cast<CPDFXFA_Context*>(document), page_index); pPage->LoadPDFPage(pPageDict); #else // PDF_ENABLE_XFA CPDF_Page* pPage = new CPDF_Page(pDoc, pPageDict, true); pPage->ParseContent(); #endif // PDF_ENABLE_XFA return pPage; } DLLEXPORT int STDCALL FPDFPage_GetRotation(FPDF_PAGE page) { CPDF_Page* pPage = CPDFPageFromFPDFPage(page); if (!IsPageObject(pPage)) return -1; CPDF_Dictionary* pDict = pPage->m_pFormDict; while (pDict) { if (pDict->KeyExist("Rotate")) { CPDF_Object* pRotateObj = pDict->GetObjectFor("Rotate")->GetDirect(); return pRotateObj ? pRotateObj->GetInteger() / 90 : 0; } if (!pDict->KeyExist("Parent")) break; pDict = ToDictionary(pDict->GetObjectFor("Parent")->GetDirect()); } return 0; } DLLEXPORT void STDCALL FPDFPage_InsertObject(FPDF_PAGE page, FPDF_PAGEOBJECT page_obj) { CPDF_PageObject* pPageObj = reinterpret_cast<CPDF_PageObject*>(page_obj); if (!pPageObj) return; std::unique_ptr<CPDF_PageObject> pPageObjHolder(pPageObj); CPDF_Page* pPage = CPDFPageFromFPDFPage(page); if (!IsPageObject(pPage)) return; pPage->GetPageObjectList()->push_back(std::move(pPageObjHolder)); switch (pPageObj->GetType()) { case CPDF_PageObject::TEXT: { break; } case CPDF_PageObject::PATH: { CPDF_PathObject* pPathObj = pPageObj->AsPath(); pPathObj->CalcBoundingBox(); break; } case CPDF_PageObject::IMAGE: { CPDF_ImageObject* pImageObj = pPageObj->AsImage(); pImageObj->CalcBoundingBox(); break; } case CPDF_PageObject::SHADING: { CPDF_ShadingObject* pShadingObj = pPageObj->AsShading(); pShadingObj->CalcBoundingBox(); break; } case CPDF_PageObject::FORM: { CPDF_FormObject* pFormObj = pPageObj->AsForm(); pFormObj->CalcBoundingBox(); break; } default: { ASSERT(false); break; } } } DLLEXPORT int STDCALL FPDFPage_CountObject(FPDF_PAGE page) { CPDF_Page* pPage = CPDFPageFromFPDFPage(page); if (!IsPageObject(pPage)) return -1; return pdfium::CollectionSize<int>(*pPage->GetPageObjectList()); } DLLEXPORT FPDF_PAGEOBJECT STDCALL FPDFPage_GetObject(FPDF_PAGE page, int index) { CPDF_Page* pPage = CPDFPageFromFPDFPage(page); if (!IsPageObject(pPage)) return nullptr; return pPage->GetPageObjectList()->GetPageObjectByIndex(index); } DLLEXPORT FPDF_BOOL STDCALL FPDFPage_HasTransparency(FPDF_PAGE page) { CPDF_Page* pPage = CPDFPageFromFPDFPage(page); return pPage && pPage->BackgroundAlphaNeeded(); } DLLEXPORT FPDF_BOOL STDCALL FPDFPageObj_HasTransparency(FPDF_PAGEOBJECT pageObject) { if (!pageObject) return false; CPDF_PageObject* pPageObj = reinterpret_cast<CPDF_PageObject*>(pageObject); int blend_type = pPageObj->m_GeneralState.GetBlendType(); if (blend_type != FXDIB_BLEND_NORMAL) return true; CPDF_Dictionary* pSMaskDict = ToDictionary(pPageObj->m_GeneralState.GetSoftMask()); if (pSMaskDict) return true; if (pPageObj->m_GeneralState.GetFillAlpha() != 1.0f) return true; if (pPageObj->IsPath() && pPageObj->m_GeneralState.GetStrokeAlpha() != 1.0f) { return true; } if (pPageObj->IsForm()) { const CPDF_Form* pForm = pPageObj->AsForm()->form(); if (pForm) { int trans = pForm->m_Transparency; if ((trans & PDFTRANS_ISOLATED) || (trans & PDFTRANS_GROUP)) return true; } } return false; } DLLEXPORT FPDF_BOOL STDCALL FPDFPage_GenerateContent(FPDF_PAGE page) { CPDF_Page* pPage = CPDFPageFromFPDFPage(page); if (!IsPageObject(pPage)) return false; CPDF_PageContentGenerator CG(pPage); CG.GenerateContent(); return true; } DLLEXPORT void STDCALL FPDFPageObj_Transform(FPDF_PAGEOBJECT page_object, double a, double b, double c, double d, double e, double f) { CPDF_PageObject* pPageObj = reinterpret_cast<CPDF_PageObject*>(page_object); if (!pPageObj) return; CFX_Matrix matrix((FX_FLOAT)a, (FX_FLOAT)b, (FX_FLOAT)c, (FX_FLOAT)d, (FX_FLOAT)e, (FX_FLOAT)f); pPageObj->Transform(matrix); } DLLEXPORT void STDCALL FPDFPage_TransformAnnots(FPDF_PAGE page, double a, double b, double c, double d, double e, double f) { CPDF_Page* pPage = CPDFPageFromFPDFPage(page); if (!pPage) return; CPDF_AnnotList AnnotList(pPage); for (size_t i = 0; i < AnnotList.Count(); ++i) { CPDF_Annot* pAnnot = AnnotList.GetAt(i); CFX_FloatRect rect = pAnnot->GetRect(); // transformAnnots Rectangle CFX_Matrix matrix((FX_FLOAT)a, (FX_FLOAT)b, (FX_FLOAT)c, (FX_FLOAT)d, (FX_FLOAT)e, (FX_FLOAT)f); rect.Transform(&matrix); CPDF_Array* pRectArray = pAnnot->GetAnnotDict()->GetArrayFor("Rect"); if (!pRectArray) pRectArray = pAnnot->GetAnnotDict()->SetNewFor<CPDF_Array>("Rect"); pRectArray->SetNewAt<CPDF_Number>(0, rect.left); pRectArray->SetNewAt<CPDF_Number>(1, rect.bottom); pRectArray->SetNewAt<CPDF_Number>(2, rect.right); pRectArray->SetNewAt<CPDF_Number>(3, rect.top); // TODO(unknown): Transform AP's rectangle } } DLLEXPORT void STDCALL FPDFPage_SetRotation(FPDF_PAGE page, int rotate) { CPDF_Page* pPage = CPDFPageFromFPDFPage(page); if (!IsPageObject(pPage)) return; CPDF_Dictionary* pDict = pPage->m_pFormDict; rotate %= 4; pDict->SetNewFor<CPDF_Number>("Rotate", rotate * 90); }