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315 lines
10 KiB
315 lines
10 KiB
// Copyright 2014 PDFium Authors. All rights reserved. |
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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_edit.h" |
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#include <algorithm> |
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#include <memory> |
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#include <utility> |
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#include "core/fpdfapi/edit/cpdf_pagecontentgenerator.h" |
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#include "core/fpdfapi/page/cpdf_form.h" |
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#include "core/fpdfapi/page/cpdf_formobject.h" |
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#include "core/fpdfapi/page/cpdf_imageobject.h" |
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#include "core/fpdfapi/page/cpdf_page.h" |
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#include "core/fpdfapi/page/cpdf_pageobject.h" |
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#include "core/fpdfapi/page/cpdf_pathobject.h" |
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#include "core/fpdfapi/page/cpdf_shadingobject.h" |
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#include "core/fpdfapi/parser/cpdf_array.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/fpdfdoc/cpdf_annot.h" |
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#include "core/fpdfdoc/cpdf_annotlist.h" |
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#include "fpdfsdk/fsdk_define.h" |
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#include "public/fpdf_formfill.h" |
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#include "third_party/base/stl_util.h" |
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#ifdef PDF_ENABLE_XFA |
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#include "fpdfsdk/fpdfxfa/cpdfxfa_context.h" |
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#include "fpdfsdk/fpdfxfa/cpdfxfa_page.h" |
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#endif // PDF_ENABLE_XFA |
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#if _FX_OS_ == _FX_ANDROID_ |
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#include <time.h> |
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#else |
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#include <ctime> |
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#endif |
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namespace { |
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static_assert(FPDF_PAGEOBJ_TEXT == CPDF_PageObject::TEXT, |
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"FPDF_PAGEOBJ_TEXT/CPDF_PageObject::TEXT mismatch"); |
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static_assert(FPDF_PAGEOBJ_PATH == CPDF_PageObject::PATH, |
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"FPDF_PAGEOBJ_PATH/CPDF_PageObject::PATH mismatch"); |
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static_assert(FPDF_PAGEOBJ_IMAGE == CPDF_PageObject::IMAGE, |
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"FPDF_PAGEOBJ_IMAGE/CPDF_PageObject::IMAGE mismatch"); |
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static_assert(FPDF_PAGEOBJ_SHADING == CPDF_PageObject::SHADING, |
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"FPDF_PAGEOBJ_SHADING/CPDF_PageObject::SHADING mismatch"); |
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static_assert(FPDF_PAGEOBJ_FORM == CPDF_PageObject::FORM, |
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"FPDF_PAGEOBJ_FORM/CPDF_PageObject::FORM mismatch"); |
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bool IsPageObject(CPDF_Page* pPage) { |
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if (!pPage || !pPage->m_pFormDict || !pPage->m_pFormDict->KeyExist("Type")) |
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return false; |
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CPDF_Object* pObject = pPage->m_pFormDict->GetObjectFor("Type")->GetDirect(); |
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return pObject && !pObject->GetString().Compare("Page"); |
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} |
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} // namespace |
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DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_CreateNewDocument() { |
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CPDF_Document* pDoc = new CPDF_Document(nullptr); |
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pDoc->CreateNewDoc(); |
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time_t currentTime; |
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CFX_ByteString DateStr; |
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if (FSDK_IsSandBoxPolicyEnabled(FPDF_POLICY_MACHINETIME_ACCESS)) { |
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if (-1 != time(¤tTime)) { |
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tm* pTM = localtime(¤tTime); |
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if (pTM) { |
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DateStr.Format("D:%04d%02d%02d%02d%02d%02d", pTM->tm_year + 1900, |
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pTM->tm_mon + 1, pTM->tm_mday, pTM->tm_hour, pTM->tm_min, |
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pTM->tm_sec); |
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} |
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} |
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} |
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CPDF_Dictionary* pInfoDict = nullptr; |
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pInfoDict = pDoc->GetInfo(); |
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if (pInfoDict) { |
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if (FSDK_IsSandBoxPolicyEnabled(FPDF_POLICY_MACHINETIME_ACCESS)) |
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pInfoDict->SetNewFor<CPDF_String>("CreationDate", DateStr, false); |
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pInfoDict->SetNewFor<CPDF_String>("Creator", L"PDFium"); |
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} |
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return FPDFDocumentFromCPDFDocument(pDoc); |
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} |
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DLLEXPORT void STDCALL FPDFPage_Delete(FPDF_DOCUMENT document, int page_index) { |
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if (UnderlyingDocumentType* pDoc = UnderlyingFromFPDFDocument(document)) |
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pDoc->DeletePage(page_index); |
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} |
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DLLEXPORT FPDF_PAGE STDCALL FPDFPage_New(FPDF_DOCUMENT document, |
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int page_index, |
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double width, |
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double height) { |
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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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page_index = std::min(std::max(page_index, 0), pDoc->GetPageCount()); |
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CPDF_Dictionary* pPageDict = pDoc->CreateNewPage(page_index); |
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if (!pPageDict) |
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return nullptr; |
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CPDF_Array* pMediaBoxArray = pPageDict->SetNewFor<CPDF_Array>("MediaBox"); |
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pMediaBoxArray->AddNew<CPDF_Number>(0); |
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pMediaBoxArray->AddNew<CPDF_Number>(0); |
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pMediaBoxArray->AddNew<CPDF_Number>(static_cast<FX_FLOAT>(width)); |
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pMediaBoxArray->AddNew<CPDF_Number>(static_cast<FX_FLOAT>(height)); |
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pPageDict->SetNewFor<CPDF_Number>("Rotate", 0); |
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pPageDict->SetNewFor<CPDF_Dictionary>("Resources"); |
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#ifdef PDF_ENABLE_XFA |
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CPDFXFA_Page* pPage = |
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new CPDFXFA_Page(static_cast<CPDFXFA_Context*>(document), page_index); |
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pPage->LoadPDFPage(pPageDict); |
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#else // PDF_ENABLE_XFA |
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CPDF_Page* pPage = new CPDF_Page(pDoc, pPageDict, true); |
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pPage->ParseContent(); |
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#endif // PDF_ENABLE_XFA |
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return pPage; |
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} |
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DLLEXPORT int STDCALL FPDFPage_GetRotation(FPDF_PAGE page) { |
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
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if (!IsPageObject(pPage)) |
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return -1; |
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CPDF_Dictionary* pDict = pPage->m_pFormDict; |
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while (pDict) { |
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if (pDict->KeyExist("Rotate")) { |
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CPDF_Object* pRotateObj = pDict->GetObjectFor("Rotate")->GetDirect(); |
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return pRotateObj ? pRotateObj->GetInteger() / 90 : 0; |
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} |
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if (!pDict->KeyExist("Parent")) |
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break; |
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pDict = ToDictionary(pDict->GetObjectFor("Parent")->GetDirect()); |
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} |
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return 0; |
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} |
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DLLEXPORT void STDCALL FPDFPage_InsertObject(FPDF_PAGE page, |
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FPDF_PAGEOBJECT page_obj) { |
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CPDF_PageObject* pPageObj = reinterpret_cast<CPDF_PageObject*>(page_obj); |
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if (!pPageObj) |
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return; |
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std::unique_ptr<CPDF_PageObject> pPageObjHolder(pPageObj); |
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
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if (!IsPageObject(pPage)) |
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return; |
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pPage->GetPageObjectList()->push_back(std::move(pPageObjHolder)); |
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switch (pPageObj->GetType()) { |
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case CPDF_PageObject::TEXT: { |
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break; |
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} |
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case CPDF_PageObject::PATH: { |
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CPDF_PathObject* pPathObj = pPageObj->AsPath(); |
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pPathObj->CalcBoundingBox(); |
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break; |
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} |
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case CPDF_PageObject::IMAGE: { |
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CPDF_ImageObject* pImageObj = pPageObj->AsImage(); |
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pImageObj->CalcBoundingBox(); |
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break; |
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} |
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case CPDF_PageObject::SHADING: { |
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CPDF_ShadingObject* pShadingObj = pPageObj->AsShading(); |
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pShadingObj->CalcBoundingBox(); |
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break; |
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} |
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case CPDF_PageObject::FORM: { |
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CPDF_FormObject* pFormObj = pPageObj->AsForm(); |
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pFormObj->CalcBoundingBox(); |
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break; |
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} |
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default: { |
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ASSERT(false); |
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break; |
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} |
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} |
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} |
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DLLEXPORT int STDCALL FPDFPage_CountObject(FPDF_PAGE page) { |
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
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if (!IsPageObject(pPage)) |
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return -1; |
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return pdfium::CollectionSize<int>(*pPage->GetPageObjectList()); |
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} |
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DLLEXPORT FPDF_PAGEOBJECT STDCALL FPDFPage_GetObject(FPDF_PAGE page, |
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int index) { |
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
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if (!IsPageObject(pPage)) |
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return nullptr; |
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return pPage->GetPageObjectList()->GetPageObjectByIndex(index); |
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} |
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DLLEXPORT FPDF_BOOL STDCALL FPDFPage_HasTransparency(FPDF_PAGE page) { |
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
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return pPage && pPage->BackgroundAlphaNeeded(); |
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} |
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DLLEXPORT FPDF_BOOL STDCALL |
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FPDFPageObj_HasTransparency(FPDF_PAGEOBJECT pageObject) { |
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if (!pageObject) |
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return false; |
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CPDF_PageObject* pPageObj = reinterpret_cast<CPDF_PageObject*>(pageObject); |
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int blend_type = pPageObj->m_GeneralState.GetBlendType(); |
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if (blend_type != FXDIB_BLEND_NORMAL) |
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return true; |
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CPDF_Dictionary* pSMaskDict = |
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ToDictionary(pPageObj->m_GeneralState.GetSoftMask()); |
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if (pSMaskDict) |
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return true; |
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if (pPageObj->m_GeneralState.GetFillAlpha() != 1.0f) |
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return true; |
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if (pPageObj->IsPath() && pPageObj->m_GeneralState.GetStrokeAlpha() != 1.0f) { |
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return true; |
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} |
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if (pPageObj->IsForm()) { |
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const CPDF_Form* pForm = pPageObj->AsForm()->form(); |
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if (pForm) { |
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int trans = pForm->m_Transparency; |
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if ((trans & PDFTRANS_ISOLATED) || (trans & PDFTRANS_GROUP)) |
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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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DLLEXPORT FPDF_BOOL STDCALL FPDFPage_GenerateContent(FPDF_PAGE page) { |
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
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if (!IsPageObject(pPage)) |
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return false; |
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CPDF_PageContentGenerator CG(pPage); |
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CG.GenerateContent(); |
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return true; |
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} |
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DLLEXPORT void STDCALL FPDFPageObj_Transform(FPDF_PAGEOBJECT page_object, |
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double a, |
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double b, |
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double c, |
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double d, |
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double e, |
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double f) { |
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CPDF_PageObject* pPageObj = reinterpret_cast<CPDF_PageObject*>(page_object); |
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if (!pPageObj) |
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return; |
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CFX_Matrix matrix((FX_FLOAT)a, (FX_FLOAT)b, (FX_FLOAT)c, (FX_FLOAT)d, |
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(FX_FLOAT)e, (FX_FLOAT)f); |
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pPageObj->Transform(matrix); |
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} |
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DLLEXPORT void STDCALL FPDFPage_TransformAnnots(FPDF_PAGE page, |
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double a, |
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double b, |
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double c, |
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double d, |
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double e, |
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double f) { |
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
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if (!pPage) |
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return; |
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CPDF_AnnotList AnnotList(pPage); |
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for (size_t i = 0; i < AnnotList.Count(); ++i) { |
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CPDF_Annot* pAnnot = AnnotList.GetAt(i); |
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CFX_FloatRect rect = pAnnot->GetRect(); // transformAnnots Rectangle |
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CFX_Matrix matrix((FX_FLOAT)a, (FX_FLOAT)b, (FX_FLOAT)c, (FX_FLOAT)d, |
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(FX_FLOAT)e, (FX_FLOAT)f); |
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matrix.TransformRect(rect); |
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CPDF_Array* pRectArray = pAnnot->GetAnnotDict()->GetArrayFor("Rect"); |
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if (!pRectArray) |
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pRectArray = pAnnot->GetAnnotDict()->SetNewFor<CPDF_Array>("Rect"); |
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pRectArray->SetNewAt<CPDF_Number>(0, rect.left); |
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pRectArray->SetNewAt<CPDF_Number>(1, rect.bottom); |
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pRectArray->SetNewAt<CPDF_Number>(2, rect.right); |
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pRectArray->SetNewAt<CPDF_Number>(3, rect.top); |
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// TODO(unknown): Transform AP's rectangle |
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} |
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} |
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DLLEXPORT void STDCALL FPDFPage_SetRotation(FPDF_PAGE page, int rotate) { |
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
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if (!IsPageObject(pPage)) |
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return; |
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CPDF_Dictionary* pDict = pPage->m_pFormDict; |
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rotate %= 4; |
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pDict->SetNewFor<CPDF_Number>("Rotate", rotate * 90); |
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}
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