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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_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/logging.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");
}
void CalcBoundingBox(CPDF_PageObject* pPageObj) {
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: {
NOTREACHED();
break;
}
}
}
} // namespace
DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_CreateNewDocument() {
auto pDoc = pdfium::MakeUnique<CPDF_Document>(nullptr);
pDoc->CreateNewDoc();
time_t currentTime;
CFX_ByteString DateStr;
if (FSDK_IsSandBoxPolicyEnabled(FPDF_POLICY_MACHINETIME_ACCESS)) {
if (time(&currentTime) != -1) {
tm* pTM = localtime(&currentTime);
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 = 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");
}
// Caller takes ownership of pDoc.
return FPDFDocumentFromCPDFDocument(pDoc.release());
}
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 = pdfium::clamp(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<float>(width));
pMediaBoxArray->AddNew<CPDF_Number>(static_cast<float>(height));
pPageDict->SetNewFor<CPDF_Number>("Rotate", 0);
pPageDict->SetNewFor<CPDF_Dictionary>("Resources");
#ifdef PDF_ENABLE_XFA
auto pXFAPage = pdfium::MakeRetain<CPDFXFA_Page>(
static_cast<CPDFXFA_Context*>(document), page_index);
pXFAPage->LoadPDFPage(pPageDict);
return pXFAPage.Leak(); // Caller takes ownership.
#else // PDF_ENABLE_XFA
auto pPage = pdfium::MakeUnique<CPDF_Page>(pDoc, pPageDict, true);
pPage->ParseContent();
return pPage.release(); // Caller takes ownership.
#endif // PDF_ENABLE_XFA
}
DLLEXPORT int STDCALL FPDFPage_GetRotation(FPDF_PAGE page) {
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
return IsPageObject(pPage) ? pPage->GetPageRotation() : -1;
}
DLLEXPORT void STDCALL FPDFPage_InsertObject(FPDF_PAGE page,
FPDF_PAGEOBJECT page_obj) {
CPDF_PageObject* pPageObj = static_cast<CPDF_PageObject*>(page_obj);
if (!pPageObj)
return;
std::unique_ptr<CPDF_PageObject> pPageObjHolder(pPageObj);
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
if (!IsPageObject(pPage))
return;
pPageObj->SetDirty(true);
pPage->GetPageObjectList()->push_back(std::move(pPageObjHolder));
CalcBoundingBox(pPageObj);
}
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 = static_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 int STDCALL FPDFPageObj_GetType(FPDF_PAGEOBJECT pageObject) {
if (!pageObject)
return FPDF_PAGEOBJ_UNKNOWN;
CPDF_PageObject* pPageObj = static_cast<CPDF_PageObject*>(pageObject);
return pPageObj->GetType();
}
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 = static_cast<CPDF_PageObject*>(page_object);
if (!pPageObj)
return;
CFX_Matrix matrix((float)a, (float)b, (float)c, (float)d, (float)e, (float)f);
pPageObj->Transform(matrix);
}
DLLEXPORT void STDCALL FPDFPageObj_SetBlendMode(FPDF_PAGEOBJECT page_object,
FPDF_BYTESTRING blend_mode) {
CPDF_PageObject* pPageObj = static_cast<CPDF_PageObject*>(page_object);
if (!pPageObj)
return;
pPageObj->m_GeneralState.SetBlendMode(blend_mode);
pPageObj->SetDirty(true);
}
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((float)a, (float)b, (float)c, (float)d, (float)e,
(float)f);
matrix.TransformRect(rect);
CPDF_Dictionary* pAnnotDict = pAnnot->GetAnnotDict();
CPDF_Array* pRectArray = pAnnotDict->GetArrayFor("Rect");
if (pRectArray)
pRectArray->Clear();
else
pRectArray = pAnnotDict->SetNewFor<CPDF_Array>("Rect");
pRectArray->AddNew<CPDF_Number>(rect.left);
pRectArray->AddNew<CPDF_Number>(rect.bottom);
pRectArray->AddNew<CPDF_Number>(rect.right);
pRectArray->AddNew<CPDF_Number>(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;
rotate %= 4;
pPage->m_pFormDict->SetNewFor<CPDF_Number>("Rotate", rotate * 90);
}
FPDF_BOOL FPDFPageObj_SetFillColor(FPDF_PAGEOBJECT page_object,
unsigned int R,
unsigned int G,
unsigned int B,
unsigned int A) {
if (!page_object || R > 255 || G > 255 || B > 255 || A > 255)
return false;
float rgb[3] = {R / 255.f, G / 255.f, B / 255.f};
auto* pPageObj = static_cast<CPDF_PageObject*>(page_object);
pPageObj->m_GeneralState.SetFillAlpha(A / 255.f);
pPageObj->m_ColorState.SetFillColor(
CPDF_ColorSpace::GetStockCS(PDFCS_DEVICERGB), rgb, 3);
pPageObj->SetDirty(true);
return true;
}
DLLEXPORT FPDF_BOOL STDCALL FPDFPageObj_GetBounds(FPDF_PAGEOBJECT pageObject,
float* left,
float* bottom,
float* right,
float* top) {
if (!pageObject)
return false;
CPDF_PageObject* pPageObj = static_cast<CPDF_PageObject*>(pageObject);
CFX_FloatRect bbox = pPageObj->GetRect();
*left = bbox.left;
*bottom = bbox.bottom;
*right = bbox.right;
*top = bbox.top;
return true;
}