// 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/fpdfdoc/ctypeset.h" #include #include "core/fpdfdoc/cline.h" #include "core/fpdfdoc/cpdf_variabletext.h" #include "core/fpdfdoc/cpvt_wordinfo.h" #include "core/fpdfdoc/csection.h" #include "third_party/base/stl_util.h" namespace { const uint8_t special_chars[128] = { 0x00, 0x0C, 0x08, 0x0C, 0x08, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x08, 0x00, 0x10, 0x00, 0x00, 0x28, 0x0C, 0x08, 0x00, 0x00, 0x28, 0x28, 0x28, 0x28, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x08, 0x08, 0x00, 0x00, 0x00, 0x08, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x0C, 0x00, 0x08, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x0C, 0x00, 0x08, 0x00, 0x00, }; bool IsLatin(uint16_t word) { if (word <= 0x007F) return !!(special_chars[word] & 0x01); return ((word >= 0x00C0 && word <= 0x00FF) || (word >= 0x0100 && word <= 0x024F) || (word >= 0x1E00 && word <= 0x1EFF) || (word >= 0x2C60 && word <= 0x2C7F) || (word >= 0xA720 && word <= 0xA7FF) || (word >= 0xFF21 && word <= 0xFF3A) || (word >= 0xFF41 && word <= 0xFF5A)); } bool IsDigit(uint32_t word) { return word >= 0x0030 && word <= 0x0039; } bool IsCJK(uint32_t word) { if ((word >= 0x1100 && word <= 0x11FF) || (word >= 0x2E80 && word <= 0x2FFF) || (word >= 0x3040 && word <= 0x9FBF) || (word >= 0xAC00 && word <= 0xD7AF) || (word >= 0xF900 && word <= 0xFAFF) || (word >= 0xFE30 && word <= 0xFE4F) || (word >= 0x20000 && word <= 0x2A6DF) || (word >= 0x2F800 && word <= 0x2FA1F)) { return true; } if (word >= 0x3000 && word <= 0x303F) { return ( word == 0x3005 || word == 0x3006 || word == 0x3021 || word == 0x3022 || word == 0x3023 || word == 0x3024 || word == 0x3025 || word == 0x3026 || word == 0x3027 || word == 0x3028 || word == 0x3029 || word == 0x3031 || word == 0x3032 || word == 0x3033 || word == 0x3034 || word == 0x3035); } return word >= 0xFF66 && word <= 0xFF9D; } bool IsPunctuation(uint32_t word) { if (word <= 0x007F) return !!(special_chars[word] & 0x08); if (word >= 0x0080 && word <= 0x00FF) { return (word == 0x0082 || word == 0x0084 || word == 0x0085 || word == 0x0091 || word == 0x0092 || word == 0x0093 || word <= 0x0094 || word == 0x0096 || word == 0x00B4 || word == 0x00B8); } if (word >= 0x2000 && word <= 0x206F) { return ( word == 0x2010 || word == 0x2011 || word == 0x2012 || word == 0x2013 || word == 0x2018 || word == 0x2019 || word == 0x201A || word == 0x201B || word == 0x201C || word == 0x201D || word == 0x201E || word == 0x201F || word == 0x2032 || word == 0x2033 || word == 0x2034 || word == 0x2035 || word == 0x2036 || word == 0x2037 || word == 0x203C || word == 0x203D || word == 0x203E || word == 0x2044); } if (word >= 0x3000 && word <= 0x303F) { return ( word == 0x3001 || word == 0x3002 || word == 0x3003 || word == 0x3005 || word == 0x3009 || word == 0x300A || word == 0x300B || word == 0x300C || word == 0x300D || word == 0x300F || word == 0x300E || word == 0x3010 || word == 0x3011 || word == 0x3014 || word == 0x3015 || word == 0x3016 || word == 0x3017 || word == 0x3018 || word == 0x3019 || word == 0x301A || word == 0x301B || word == 0x301D || word == 0x301E || word == 0x301F); } if (word >= 0xFE50 && word <= 0xFE6F) return (word >= 0xFE50 && word <= 0xFE5E) || word == 0xFE63; if (word >= 0xFF00 && word <= 0xFFEF) { return ( word == 0xFF01 || word == 0xFF02 || word == 0xFF07 || word == 0xFF08 || word == 0xFF09 || word == 0xFF0C || word == 0xFF0E || word == 0xFF0F || word == 0xFF1A || word == 0xFF1B || word == 0xFF1F || word == 0xFF3B || word == 0xFF3D || word == 0xFF40 || word == 0xFF5B || word == 0xFF5C || word == 0xFF5D || word == 0xFF61 || word == 0xFF62 || word == 0xFF63 || word == 0xFF64 || word == 0xFF65 || word == 0xFF9E || word == 0xFF9F); } return false; } bool IsConnectiveSymbol(uint32_t word) { return word <= 0x007F && (special_chars[word] & 0x20); } bool IsOpenStylePunctuation(uint32_t word) { if (word <= 0x007F) return !!(special_chars[word] & 0x04); return (word == 0x300A || word == 0x300C || word == 0x300E || word == 0x3010 || word == 0x3014 || word == 0x3016 || word == 0x3018 || word == 0x301A || word == 0xFF08 || word == 0xFF3B || word == 0xFF5B || word == 0xFF62); } bool IsCurrencySymbol(uint16_t word) { return (word == 0x0024 || word == 0x0080 || word == 0x00A2 || word == 0x00A3 || word == 0x00A4 || word == 0x00A5 || (word >= 0x20A0 && word <= 0x20CF) || word == 0xFE69 || word == 0xFF04 || word == 0xFFE0 || word == 0xFFE1 || word == 0xFFE5 || word == 0xFFE6); } bool IsPrefixSymbol(uint16_t word) { return IsCurrencySymbol(word) || word == 0x2116; } bool IsSpace(uint16_t word) { return word == 0x0020 || word == 0x3000; } bool NeedDivision(uint16_t prevWord, uint16_t curWord) { if ((IsLatin(prevWord) || IsDigit(prevWord)) && (IsLatin(curWord) || IsDigit(curWord))) { return false; } if (IsSpace(curWord) || IsPunctuation(curWord)) { return false; } if (IsConnectiveSymbol(prevWord) || IsConnectiveSymbol(curWord)) { return false; } if (IsSpace(prevWord) || IsPunctuation(prevWord)) { return true; } if (IsPrefixSymbol(prevWord)) { return false; } if (IsPrefixSymbol(curWord) || IsCJK(curWord)) { return true; } if (IsCJK(prevWord)) { return true; } return false; } } // namespace CTypeset::CTypeset(CSection* pSection) : m_rcRet(0.0f, 0.0f, 0.0f, 0.0f), m_pVT(pSection->m_pVT), m_pSection(pSection) {} CTypeset::~CTypeset() {} CPVT_FloatRect CTypeset::CharArray() { m_rcRet = CPVT_FloatRect(0, 0, 0, 0); if (m_pSection->m_LineArray.empty()) return m_rcRet; float fNodeWidth = m_pVT->GetPlateWidth() / (m_pVT->GetCharArray() <= 0 ? 1 : m_pVT->GetCharArray()); float fLineAscent = m_pVT->GetFontAscent(m_pVT->GetDefaultFontIndex(), m_pVT->GetFontSize()); float fLineDescent = m_pVT->GetFontDescent(m_pVT->GetDefaultFontIndex(), m_pVT->GetFontSize()); float x = 0.0f; float y = m_pVT->GetLineLeading() + fLineAscent; int32_t nStart = 0; CLine* pLine = m_pSection->m_LineArray.front().get(); switch (m_pVT->GetAlignment()) { case 0: pLine->m_LineInfo.fLineX = fNodeWidth * VARIABLETEXT_HALF; break; case 1: nStart = (m_pVT->GetCharArray() - pdfium::CollectionSize(m_pSection->m_WordArray)) / 2; pLine->m_LineInfo.fLineX = fNodeWidth * nStart - fNodeWidth * VARIABLETEXT_HALF; break; case 2: nStart = m_pVT->GetCharArray() - pdfium::CollectionSize(m_pSection->m_WordArray); pLine->m_LineInfo.fLineX = fNodeWidth * nStart - fNodeWidth * VARIABLETEXT_HALF; break; } for (int32_t w = 0, sz = pdfium::CollectionSize(m_pSection->m_WordArray); w < sz; w++) { if (w >= m_pVT->GetCharArray()) break; float fNextWidth = 0; if (pdfium::IndexInBounds(m_pSection->m_WordArray, w + 1)) { CPVT_WordInfo* pNextWord = m_pSection->m_WordArray[w + 1].get(); pNextWord->fWordTail = 0; fNextWidth = m_pVT->GetWordWidth(*pNextWord); } CPVT_WordInfo* pWord = m_pSection->m_WordArray[w].get(); pWord->fWordTail = 0; float fWordWidth = m_pVT->GetWordWidth(*pWord); float fWordAscent = m_pVT->GetWordAscent(*pWord); float fWordDescent = m_pVT->GetWordDescent(*pWord); x = (float)(fNodeWidth * (w + nStart + 0.5) - fWordWidth * VARIABLETEXT_HALF); pWord->fWordX = x; pWord->fWordY = y; if (w == 0) { pLine->m_LineInfo.fLineX = x; } if (w != pdfium::CollectionSize(m_pSection->m_WordArray) - 1) { pWord->fWordTail = (fNodeWidth - (fWordWidth + fNextWidth) * VARIABLETEXT_HALF > 0 ? fNodeWidth - (fWordWidth + fNextWidth) * VARIABLETEXT_HALF : 0); } else { pWord->fWordTail = 0; } x += fWordWidth; fLineAscent = std::max(fLineAscent, fWordAscent); fLineDescent = std::min(fLineDescent, fWordDescent); } pLine->m_LineInfo.nBeginWordIndex = 0; pLine->m_LineInfo.nEndWordIndex = pdfium::CollectionSize(m_pSection->m_WordArray) - 1; pLine->m_LineInfo.fLineY = y; pLine->m_LineInfo.fLineWidth = x - pLine->m_LineInfo.fLineX; pLine->m_LineInfo.fLineAscent = fLineAscent; pLine->m_LineInfo.fLineDescent = fLineDescent; m_rcRet = CPVT_FloatRect(0, 0, x, y - fLineDescent); return m_rcRet; } CFX_SizeF CTypeset::GetEditSize(float fFontSize) { ASSERT(m_pSection); ASSERT(m_pVT); SplitLines(false, fFontSize); return CFX_SizeF(m_rcRet.Width(), m_rcRet.Height()); } CPVT_FloatRect CTypeset::Typeset() { ASSERT(m_pVT); m_pSection->m_LineArray.clear(); SplitLines(true, 0.0f); OutputLines(); return m_rcRet; } void CTypeset::SplitLines(bool bTypeset, float fFontSize) { ASSERT(m_pVT); ASSERT(m_pSection); int32_t nLineHead = 0; int32_t nLineTail = 0; float fMaxX = 0.0f, fMaxY = 0.0f; float fLineWidth = 0.0f, fBackupLineWidth = 0.0f; float fLineAscent = 0.0f, fBackupLineAscent = 0.0f; float fLineDescent = 0.0f, fBackupLineDescent = 0.0f; int32_t nWordStartPos = 0; bool bFullWord = false; int32_t nLineFullWordIndex = 0; int32_t nCharIndex = 0; CPVT_LineInfo line; float fWordWidth = 0; float fTypesetWidth = std::max(m_pVT->GetPlateWidth() - m_pVT->GetLineIndent(), 0.0f); int32_t nTotalWords = pdfium::CollectionSize(m_pSection->m_WordArray); bool bOpened = false; if (nTotalWords > 0) { int32_t i = 0; while (i < nTotalWords) { CPVT_WordInfo* pWord = m_pSection->m_WordArray[i].get(); CPVT_WordInfo* pOldWord = pWord; if (i > 0) { pOldWord = m_pSection->m_WordArray[i - 1].get(); } if (pWord) { if (bTypeset) { fLineAscent = std::max(fLineAscent, m_pVT->GetWordAscent(*pWord)); fLineDescent = std::min(fLineDescent, m_pVT->GetWordDescent(*pWord)); fWordWidth = m_pVT->GetWordWidth(*pWord); } else { fLineAscent = std::max(fLineAscent, m_pVT->GetWordAscent(*pWord, fFontSize)); fLineDescent = std::min(fLineDescent, m_pVT->GetWordDescent(*pWord, fFontSize)); fWordWidth = m_pVT->GetWordWidth( pWord->nFontIndex, pWord->Word, m_pVT->GetSubWord(), m_pVT->GetCharSpace(), fFontSize, pWord->fWordTail); } if (!bOpened) { if (IsOpenStylePunctuation(pWord->Word)) { bOpened = true; bFullWord = true; } else if (pOldWord) { if (NeedDivision(pOldWord->Word, pWord->Word)) { bFullWord = true; } } } else { if (!IsSpace(pWord->Word) && !IsOpenStylePunctuation(pWord->Word)) { bOpened = false; } } if (bFullWord) { bFullWord = false; if (nCharIndex > 0) { nLineFullWordIndex++; } nWordStartPos = i; fBackupLineWidth = fLineWidth; fBackupLineAscent = fLineAscent; fBackupLineDescent = fLineDescent; } nCharIndex++; } if (m_pVT->IsAutoReturn() && fTypesetWidth > 0 && fLineWidth + fWordWidth > fTypesetWidth) { if (nLineFullWordIndex > 0) { i = nWordStartPos; fLineWidth = fBackupLineWidth; fLineAscent = fBackupLineAscent; fLineDescent = fBackupLineDescent; } if (nCharIndex == 1) { fLineWidth = fWordWidth; i++; } nLineTail = i - 1; if (bTypeset) { line.nBeginWordIndex = nLineHead; line.nEndWordIndex = nLineTail; line.nTotalWord = nLineTail - nLineHead + 1; line.fLineWidth = fLineWidth; line.fLineAscent = fLineAscent; line.fLineDescent = fLineDescent; m_pSection->AddLine(line); } fMaxY += (fLineAscent + m_pVT->GetLineLeading()); fMaxY -= fLineDescent; fMaxX = std::max(fLineWidth, fMaxX); nLineHead = i; fLineWidth = 0.0f; fLineAscent = 0.0f; fLineDescent = 0.0f; nCharIndex = 0; nLineFullWordIndex = 0; bFullWord = false; } else { fLineWidth += fWordWidth; i++; } } if (nLineHead <= nTotalWords - 1) { nLineTail = nTotalWords - 1; if (bTypeset) { line.nBeginWordIndex = nLineHead; line.nEndWordIndex = nLineTail; line.nTotalWord = nLineTail - nLineHead + 1; line.fLineWidth = fLineWidth; line.fLineAscent = fLineAscent; line.fLineDescent = fLineDescent; m_pSection->AddLine(line); } fMaxY += (fLineAscent + m_pVT->GetLineLeading()); fMaxY -= fLineDescent; fMaxX = std::max(fLineWidth, fMaxX); } } else { if (bTypeset) { fLineAscent = m_pVT->GetLineAscent(); fLineDescent = m_pVT->GetLineDescent(); } else { fLineAscent = m_pVT->GetFontAscent(m_pVT->GetDefaultFontIndex(), fFontSize); fLineDescent = m_pVT->GetFontDescent(m_pVT->GetDefaultFontIndex(), fFontSize); } if (bTypeset) { line.nBeginWordIndex = -1; line.nEndWordIndex = -1; line.nTotalWord = 0; line.fLineWidth = 0; line.fLineAscent = fLineAscent; line.fLineDescent = fLineDescent; m_pSection->AddLine(line); } fMaxY += m_pVT->GetLineLeading() + fLineAscent - fLineDescent; } m_rcRet = CPVT_FloatRect(0, 0, fMaxX, fMaxY); } void CTypeset::OutputLines() { ASSERT(m_pVT); ASSERT(m_pSection); float fMinX = 0.0f, fMinY = 0.0f, fMaxX = 0.0f, fMaxY = 0.0f; float fPosX = 0.0f, fPosY = 0.0f; float fLineIndent = m_pVT->GetLineIndent(); float fTypesetWidth = std::max(m_pVT->GetPlateWidth() - fLineIndent, 0.0f); switch (m_pVT->GetAlignment()) { default: case 0: fMinX = 0.0f; break; case 1: fMinX = (fTypesetWidth - m_rcRet.Width()) * VARIABLETEXT_HALF; break; case 2: fMinX = fTypesetWidth - m_rcRet.Width(); break; } fMaxX = fMinX + m_rcRet.Width(); fMinY = 0.0f; fMaxY = m_rcRet.Height(); int32_t nTotalLines = pdfium::CollectionSize(m_pSection->m_LineArray); if (nTotalLines > 0) { for (int32_t l = 0; l < nTotalLines; l++) { CLine* pLine = m_pSection->m_LineArray[l].get(); switch (m_pVT->GetAlignment()) { default: case 0: fPosX = 0; break; case 1: fPosX = (fTypesetWidth - pLine->m_LineInfo.fLineWidth) * VARIABLETEXT_HALF; break; case 2: fPosX = fTypesetWidth - pLine->m_LineInfo.fLineWidth; break; } fPosX += fLineIndent; fPosY += m_pVT->GetLineLeading(); fPosY += pLine->m_LineInfo.fLineAscent; pLine->m_LineInfo.fLineX = fPosX - fMinX; pLine->m_LineInfo.fLineY = fPosY - fMinY; for (int32_t w = pLine->m_LineInfo.nBeginWordIndex; w <= pLine->m_LineInfo.nEndWordIndex; w++) { if (pdfium::IndexInBounds(m_pSection->m_WordArray, w)) { CPVT_WordInfo* pWord = m_pSection->m_WordArray[w].get(); pWord->fWordX = fPosX - fMinX; pWord->fWordY = fPosY - fMinY; fPosX += m_pVT->GetWordWidth(*pWord); } } fPosY -= pLine->m_LineInfo.fLineDescent; } } m_rcRet = CPVT_FloatRect(fMinX, fMinY, fMaxX, fMaxY); }