cpdf_annotcontext.cpp

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// Copyright 2018 The PDFium Authors
// 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 "core/fpdfapi/page/cpdf_annotcontext.h"
 
#include <utility>
 
#include "core/fpdfapi/page/cpdf_form.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "third_party/base/check.h"
 
#ifdef SetForm
#undef SetForm
#endif
 
CPDF_AnnotContext::CPDF_AnnotContext(RetainPtr<CPDF_Dictionary> pAnnotDict,
                                     IPDF_Page* pPage)
    : m_pAnnotDict(std::move(pAnnotDict)), m_pPage(pPage) {
  DCHECK(m_pAnnotDict);
  DCHECK(m_pPage);
  DCHECK(m_pPage->AsPDFPage());
}
 
CPDF_AnnotContext::~CPDF_AnnotContext() = default;
 
void CPDF_AnnotContext::SetForm(RetainPtr<CPDF_Stream> pStream) {
  if (!pStream)
    return;
 
  // Reset the annotation matrix to be the identity matrix, since the
  // appearance stream already takes matrix into account.
  pStream->GetMutableDict()->SetMatrixFor("Matrix", CFX_Matrix());
 
  m_pAnnotForm = std::make_unique<CPDF_Form>(
      m_pPage->GetDocument(), m_pPage->AsPDFPage()->GetMutableResources(),
      pStream);
  m_pAnnotForm->ParseContent();
}