// 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 "fpdfsdk/cba_annotiterator.h" #include <algorithm> #include "core/fpdfapi/page/cpdf_page.h" #include "fpdfsdk/cpdfsdk_annot.h" #include "fpdfsdk/cpdfsdk_pageview.h" namespace { CFX_FloatRect GetAnnotRect(const CPDFSDK_Annot* pAnnot) { return pAnnot->GetPDFAnnot()->GetRect(); } bool CompareByLeftAscending(const CPDFSDK_Annot* p1, const CPDFSDK_Annot* p2) { return GetAnnotRect(p1).left < GetAnnotRect(p2).left; } bool CompareByTopDescending(const CPDFSDK_Annot* p1, const CPDFSDK_Annot* p2) { return GetAnnotRect(p1).top > GetAnnotRect(p2).top; } } // namespace CBA_AnnotIterator::CBA_AnnotIterator(CPDFSDK_PageView* pPageView, CPDF_Annot::Subtype nAnnotSubtype) : m_eTabOrder(STRUCTURE), m_pPageView(pPageView), m_nAnnotSubtype(nAnnotSubtype) { CPDF_Page* pPDFPage = m_pPageView->GetPDFPage(); CFX_ByteString sTabs = pPDFPage->m_pFormDict->GetStringFor("Tabs"); if (sTabs == "R") m_eTabOrder = ROW; else if (sTabs == "C") m_eTabOrder = COLUMN; GenerateResults(); } CBA_AnnotIterator::~CBA_AnnotIterator() {} CPDFSDK_Annot* CBA_AnnotIterator::GetFirstAnnot() { return m_Annots.empty() ? nullptr : m_Annots.front(); } CPDFSDK_Annot* CBA_AnnotIterator::GetLastAnnot() { return m_Annots.empty() ? nullptr : m_Annots.back(); } CPDFSDK_Annot* CBA_AnnotIterator::GetNextAnnot(CPDFSDK_Annot* pAnnot) { auto iter = std::find(m_Annots.begin(), m_Annots.end(), pAnnot); if (iter == m_Annots.end()) return nullptr; ++iter; if (iter == m_Annots.end()) iter = m_Annots.begin(); return *iter; } CPDFSDK_Annot* CBA_AnnotIterator::GetPrevAnnot(CPDFSDK_Annot* pAnnot) { auto iter = std::find(m_Annots.begin(), m_Annots.end(), pAnnot); if (iter == m_Annots.end()) return nullptr; if (iter == m_Annots.begin()) iter = m_Annots.end(); return *(--iter); } void CBA_AnnotIterator::CollectAnnots(std::vector<CPDFSDK_Annot*>* pArray) { for (auto pAnnot : m_pPageView->GetAnnotList()) { if (pAnnot->GetAnnotSubtype() == m_nAnnotSubtype && !pAnnot->IsSignatureWidget()) { pArray->push_back(pAnnot); } } } CFX_FloatRect CBA_AnnotIterator::AddToAnnotsList( std::vector<CPDFSDK_Annot*>* sa, size_t idx) { CPDFSDK_Annot* pLeftTopAnnot = sa->at(idx); CFX_FloatRect rcLeftTop = GetAnnotRect(pLeftTopAnnot); m_Annots.push_back(pLeftTopAnnot); sa->erase(sa->begin() + idx); return rcLeftTop; } void CBA_AnnotIterator::AddSelectedToAnnots(std::vector<CPDFSDK_Annot*>* sa, std::vector<size_t>* aSelect) { for (size_t i = 0; i < aSelect->size(); ++i) m_Annots.push_back(sa->at(aSelect->at(i))); for (int i = aSelect->size() - 1; i >= 0; --i) sa->erase(sa->begin() + aSelect->at(i)); } void CBA_AnnotIterator::GenerateResults() { switch (m_eTabOrder) { case STRUCTURE: CollectAnnots(&m_Annots); break; case ROW: { std::vector<CPDFSDK_Annot*> sa; CollectAnnots(&sa); std::sort(sa.begin(), sa.end(), CompareByLeftAscending); while (!sa.empty()) { int nLeftTopIndex = -1; FX_FLOAT fTop = 0.0f; for (int i = sa.size() - 1; i >= 0; i--) { CFX_FloatRect rcAnnot = GetAnnotRect(sa[i]); if (rcAnnot.top > fTop) { nLeftTopIndex = i; fTop = rcAnnot.top; } } if (nLeftTopIndex < 0) continue; CFX_FloatRect rcLeftTop = AddToAnnotsList(&sa, nLeftTopIndex); std::vector<size_t> aSelect; for (size_t i = 0; i < sa.size(); ++i) { CFX_FloatRect rcAnnot = GetAnnotRect(sa[i]); FX_FLOAT fCenterY = (rcAnnot.top + rcAnnot.bottom) / 2.0f; if (fCenterY > rcLeftTop.bottom && fCenterY < rcLeftTop.top) aSelect.push_back(i); } AddSelectedToAnnots(&sa, &aSelect); } break; } case COLUMN: { std::vector<CPDFSDK_Annot*> sa; CollectAnnots(&sa); std::sort(sa.begin(), sa.end(), CompareByTopDescending); while (!sa.empty()) { int nLeftTopIndex = -1; FX_FLOAT fLeft = -1.0f; for (int i = sa.size() - 1; i >= 0; --i) { CFX_FloatRect rcAnnot = GetAnnotRect(sa[i]); if (fLeft < 0) { nLeftTopIndex = 0; fLeft = rcAnnot.left; } else if (rcAnnot.left < fLeft) { nLeftTopIndex = i; fLeft = rcAnnot.left; } } if (nLeftTopIndex < 0) continue; CFX_FloatRect rcLeftTop = AddToAnnotsList(&sa, nLeftTopIndex); std::vector<size_t> aSelect; for (size_t i = 0; i < sa.size(); ++i) { CFX_FloatRect rcAnnot = GetAnnotRect(sa[i]); FX_FLOAT fCenterX = (rcAnnot.left + rcAnnot.right) / 2.0f; if (fCenterX > rcLeftTop.left && fCenterX < rcLeftTop.right) aSelect.push_back(i); } AddSelectedToAnnots(&sa, &aSelect); } break; } } }