| // 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/cpdfsdk_annotiterator.h" |
| |
| #include <algorithm> |
| |
| #include "core/fpdfapi/page/cpdf_page.h" |
| #include "core/fpdfapi/parser/cpdf_dictionary.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; |
| } |
| |
| CPDFSDK_AnnotIterator::TabOrder GetTabOrder(CPDFSDK_PageView* pPageView) { |
| CPDF_Page* pPDFPage = pPageView->GetPDFPage(); |
| ByteString sTabs = pPDFPage->GetDict()->GetStringFor("Tabs"); |
| if (sTabs == "R") |
| return CPDFSDK_AnnotIterator::ROW; |
| if (sTabs == "C") |
| return CPDFSDK_AnnotIterator::COLUMN; |
| return CPDFSDK_AnnotIterator::STRUCTURE; |
| } |
| |
| } // namespace |
| |
| CPDFSDK_AnnotIterator::CPDFSDK_AnnotIterator(CPDFSDK_PageView* pPageView, |
| CPDF_Annot::Subtype nAnnotSubtype) |
| : m_pPageView(pPageView), |
| m_nAnnotSubtype(nAnnotSubtype), |
| m_eTabOrder(GetTabOrder(pPageView)) { |
| GenerateResults(); |
| } |
| |
| CPDFSDK_AnnotIterator::~CPDFSDK_AnnotIterator() = default; |
| |
| CPDFSDK_Annot* CPDFSDK_AnnotIterator::GetFirstAnnot() { |
| return m_Annots.empty() ? nullptr : m_Annots.front(); |
| } |
| |
| CPDFSDK_Annot* CPDFSDK_AnnotIterator::GetLastAnnot() { |
| return m_Annots.empty() ? nullptr : m_Annots.back(); |
| } |
| |
| CPDFSDK_Annot* CPDFSDK_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* CPDFSDK_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 CPDFSDK_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 CPDFSDK_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 CPDFSDK_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 CPDFSDK_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; |
| 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]); |
| 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; |
| 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]); |
| float fCenterX = (rcAnnot.left + rcAnnot.right) / 2.0f; |
| if (fCenterX > rcLeftTop.left && fCenterX < rcLeftTop.right) |
| aSelect.push_back(i); |
| } |
| AddSelectedToAnnots(&sa, &aSelect); |
| } |
| break; |
| } |
| } |
| } |