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// Copyright 2016 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 "core/fpdfapi/page/cpdf_pageobjectholder.h"
#include <algorithm>
#include <utility>
#include "constants/transparency.h"
#include "core/fpdfapi/page/cpdf_allstates.h"
#include "core/fpdfapi/page/cpdf_contentparser.h"
#include "core/fpdfapi/page/cpdf_pageobject.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
CPDF_PageObjectHolder::CPDF_PageObjectHolder(CPDF_Document* pDoc,
CPDF_Dictionary* pFormDict)
: m_pFormDict(pFormDict), m_pDocument(pDoc) {
// TODO(thestig): Check if |m_pFormDict| is never a nullptr and simplify
// callers that checks for that.
}
CPDF_PageObjectHolder::~CPDF_PageObjectHolder() {}
bool CPDF_PageObjectHolder::IsPage() const {
return false;
}
void CPDF_PageObjectHolder::StartParse(
std::unique_ptr<CPDF_ContentParser> pParser) {
ASSERT(m_ParseState == ParseState::kNotParsed);
m_pParser = std::move(pParser);
m_ParseState = ParseState::kParsing;
}
void CPDF_PageObjectHolder::ContinueParse(PauseIndicatorIface* pPause) {
if (m_ParseState == ParseState::kParsed)
return;
ASSERT(m_ParseState == ParseState::kParsing);
if (m_pParser->Continue(pPause))
return;
m_ParseState = ParseState::kParsed;
m_pDocument->IncrementParsedPageCount();
if (m_pParser->GetCurStates())
m_LastCTM = m_pParser->GetCurStates()->m_CTM;
m_pParser.reset();
}
void CPDF_PageObjectHolder::AddImageMaskBoundingBox(const CFX_FloatRect& box) {
m_MaskBoundingBoxes.push_back(box);
}
void CPDF_PageObjectHolder::Transform(const CFX_Matrix& matrix) {
for (auto& pObj : m_PageObjectList)
pObj->Transform(matrix);
}
CFX_FloatRect CPDF_PageObjectHolder::CalcBoundingBox() const {
if (m_PageObjectList.empty())
return CFX_FloatRect();
float left = 1000000.0f;
float right = -1000000.0f;
float bottom = 1000000.0f;
float top = -1000000.0f;
for (const auto& pObj : m_PageObjectList) {
left = std::min(left, pObj->m_Left);
right = std::max(right, pObj->m_Right);
bottom = std::min(bottom, pObj->m_Bottom);
top = std::max(top, pObj->m_Top);
}
return CFX_FloatRect(left, bottom, right, top);
}
void CPDF_PageObjectHolder::LoadTransInfo() {
if (!m_pFormDict)
return;
CPDF_Dictionary* pGroup = m_pFormDict->GetDictFor("Group");
if (!pGroup)
return;
if (pGroup->GetStringFor(pdfium::transparency::kGroupSubType) !=
pdfium::transparency::kTransparency) {
return;
}
m_Transparency.SetGroup();
if (pGroup->GetIntegerFor(pdfium::transparency::kI))
m_Transparency.SetIsolated();
}
size_t CPDF_PageObjectHolder::GetPageObjectCount() const {
return pdfium::CollectionSize<size_t>(m_PageObjectList);
}
CPDF_PageObject* CPDF_PageObjectHolder::GetPageObjectByIndex(
size_t index) const {
return m_PageObjectList.GetPageObjectByIndex(index);
}
void CPDF_PageObjectHolder::AppendPageObject(
std::unique_ptr<CPDF_PageObject> pPageObj) {
m_PageObjectList.push_back(std::move(pPageObj));
}
bool CPDF_PageObjectHolder::RemovePageObject(CPDF_PageObject* pPageObj) {
pdfium::FakeUniquePtr<CPDF_PageObject> p(pPageObj);
auto it =
std::find(std::begin(m_PageObjectList), std::end(m_PageObjectList), p);
if (it == std::end(m_PageObjectList))
return false;
it->release();
m_PageObjectList.erase(it);
return true;
}
bool CPDF_PageObjectHolder::ErasePageObjectAtIndex(size_t index) {
if (index >= m_PageObjectList.size())
return false;
m_PageObjectList.erase(m_PageObjectList.begin() + index);
return true;
}
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