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Diffstat (limited to 'fpdfsdk/cpdfsdk_annotiterator.cpp')
| -rw-r--r-- | fpdfsdk/cpdfsdk_annotiterator.cpp | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/fpdfsdk/cpdfsdk_annotiterator.cpp b/fpdfsdk/cpdfsdk_annotiterator.cpp new file mode 100644 index 0000000000..1c168454fe --- /dev/null +++ b/fpdfsdk/cpdfsdk_annotiterator.cpp @@ -0,0 +1,176 @@ +// 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 "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 + +CPDFSDK_AnnotIterator::CPDFSDK_AnnotIterator(CPDFSDK_PageView* pPageView, + CPDF_Annot::Subtype nAnnotSubtype) + : m_eTabOrder(STRUCTURE), + m_pPageView(pPageView), + m_nAnnotSubtype(nAnnotSubtype) { + CPDF_Page* pPDFPage = m_pPageView->GetPDFPage(); + ByteString sTabs = pPDFPage->m_pFormDict->GetStringFor("Tabs"); + if (sTabs == "R") + m_eTabOrder = ROW; + else if (sTabs == "C") + m_eTabOrder = COLUMN; + + GenerateResults(); +} + +CPDFSDK_AnnotIterator::~CPDFSDK_AnnotIterator() {} + +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; + } + } +} |