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1002 lines
30 KiB
1002 lines
30 KiB
// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "xfa/fgas/layout/cfx_txtbreak.h"
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#include <algorithm>
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#include "build/build_config.h"
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#include "core/fxcrt/fx_safe_types.h"
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#include "core/fxge/text_char_pos.h"
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#include "third_party/base/stl_util.h"
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#include "xfa/fgas/font/cfgas_gefont.h"
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#include "xfa/fgas/layout/cfx_char.h"
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#include "xfa/fgas/layout/fx_arabic.h"
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#include "xfa/fgas/layout/fx_linebreak.h"
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namespace {
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bool IsCtrlCode(wchar_t wch) {
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FX_CHARTYPE dwRet = FX_GetCharType(wch);
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return dwRet == FX_CHARTYPE::kTab || dwRet == FX_CHARTYPE::kControl;
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}
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} // namespace
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CFX_TxtBreak::CFX_TxtBreak()
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: CFX_Break(FX_LAYOUTSTYLE_None),
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m_iAlignment(CFX_TxtLineAlignment_Left),
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m_iCombWidth(360000) {}
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CFX_TxtBreak::~CFX_TxtBreak() {}
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void CFX_TxtBreak::SetLineWidth(float fLineWidth) {
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m_iLineWidth = FXSYS_roundf(fLineWidth * kConversionFactor);
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ASSERT(m_iLineWidth >= 20000);
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}
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void CFX_TxtBreak::SetAlignment(int32_t iAlignment) {
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ASSERT(iAlignment >= CFX_TxtLineAlignment_Left);
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ASSERT(iAlignment <= CFX_TxtLineAlignment_Justified);
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m_iAlignment = iAlignment;
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}
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void CFX_TxtBreak::SetCombWidth(float fCombWidth) {
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m_iCombWidth = FXSYS_roundf(fCombWidth * kConversionFactor);
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}
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void CFX_TxtBreak::AppendChar_Combination(CFX_Char* pCurChar) {
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wchar_t wch = pCurChar->char_code();
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wchar_t wForm;
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FX_SAFE_INT32 iCharWidth = 0;
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pCurChar->m_iCharWidth = -1;
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if (m_bCombText) {
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iCharWidth = m_iCombWidth;
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} else {
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wForm = wch;
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CFX_Char* pLastChar = GetLastChar(0, false, false);
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if (pLastChar &&
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(pLastChar->m_dwCharStyles & FX_TXTCHARSTYLE_ArabicShadda) == 0) {
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bool bShadda = false;
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if (wch == 0x0651) {
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wchar_t wLast = pLastChar->char_code();
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if (wLast >= 0x064C && wLast <= 0x0650) {
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wForm = FX_GetArabicFromShaddaTable(wLast);
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bShadda = true;
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}
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} else if (wch >= 0x064C && wch <= 0x0650) {
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if (pLastChar->char_code() == 0x0651) {
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wForm = FX_GetArabicFromShaddaTable(wch);
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bShadda = true;
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}
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}
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if (bShadda) {
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pLastChar->m_dwCharStyles |= FX_TXTCHARSTYLE_ArabicShadda;
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pLastChar->m_iCharWidth = 0;
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pCurChar->m_dwCharStyles |= FX_TXTCHARSTYLE_ArabicShadda;
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}
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}
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int32_t iCharWidthOut;
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if (m_pFont && m_pFont->GetCharWidth(wForm, &iCharWidthOut))
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iCharWidth = iCharWidthOut;
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else
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iCharWidth = 0;
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iCharWidth *= m_iFontSize;
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iCharWidth *= m_iHorizontalScale;
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iCharWidth /= 100;
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}
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iCharWidth *= -1;
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pCurChar->m_iCharWidth = iCharWidth.ValueOrDefault(0);
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}
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void CFX_TxtBreak::AppendChar_Tab(CFX_Char* pCurChar) {
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m_eCharType = FX_CHARTYPE::kTab;
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}
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CFX_BreakType CFX_TxtBreak::AppendChar_Control(CFX_Char* pCurChar) {
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m_eCharType = FX_CHARTYPE::kControl;
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CFX_BreakType dwRet = CFX_BreakType::None;
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if (!m_bSingleLine) {
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wchar_t wch = pCurChar->char_code();
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switch (wch) {
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case L'\v':
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case 0x2028:
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dwRet = CFX_BreakType::Line;
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break;
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case L'\f':
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dwRet = CFX_BreakType::Page;
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break;
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case 0x2029:
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dwRet = CFX_BreakType::Paragraph;
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break;
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default:
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if (wch == m_wParagraphBreakChar)
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dwRet = CFX_BreakType::Paragraph;
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break;
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}
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if (dwRet != CFX_BreakType::None)
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dwRet = EndBreak(dwRet);
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}
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return dwRet;
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}
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CFX_BreakType CFX_TxtBreak::AppendChar_Arabic(CFX_Char* pCurChar) {
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FX_CHARTYPE chartype = pCurChar->GetCharType();
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int32_t& iLineWidth = m_pCurLine->m_iWidth;
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wchar_t wForm;
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CFX_Char* pLastChar = nullptr;
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bool bAlef = false;
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if (!m_bCombText && m_eCharType >= FX_CHARTYPE::kArabicAlef &&
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m_eCharType <= FX_CHARTYPE::kArabicDistortion) {
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FX_SAFE_INT32 iCharWidth = 0;
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pLastChar = GetLastChar(1, true, false);
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if (pLastChar) {
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if (pLastChar->m_iCharWidth > 0)
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iLineWidth -= pLastChar->m_iCharWidth;
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iCharWidth = pLastChar->m_iCharWidth;
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CFX_Char* pPrevChar = GetLastChar(2, true, false);
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wForm = pdfium::arabic::GetFormChar(pLastChar, pPrevChar, pCurChar);
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bAlef = (wForm == 0xFEFF &&
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pLastChar->GetCharType() == FX_CHARTYPE::kArabicAlef);
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if (m_pFont) {
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int32_t iCharWidthOut = 0;
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m_pFont->GetCharWidth(wForm, &iCharWidthOut);
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iCharWidth = iCharWidthOut;
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}
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if (wForm == 0xFEFF)
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iCharWidth = 0;
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iCharWidth *= m_iFontSize;
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iCharWidth *= m_iHorizontalScale;
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iCharWidth /= 100;
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int32_t iCharWidthValid = iCharWidth.ValueOrDefault(0);
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pLastChar->m_iCharWidth = iCharWidthValid;
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iLineWidth += iCharWidthValid;
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}
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}
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m_eCharType = chartype;
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wForm = pdfium::arabic::GetFormChar(pCurChar, bAlef ? nullptr : pLastChar,
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nullptr);
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FX_SAFE_INT32 iCharWidth = 0;
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if (m_bCombText) {
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iCharWidth = m_iCombWidth;
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} else {
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if (m_pFont) {
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int32_t iCharWidthOut = 0;
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m_pFont->GetCharWidth(wForm, &iCharWidthOut);
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iCharWidth = iCharWidthOut;
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}
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if (wForm == 0xFEFF)
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iCharWidth = 0;
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iCharWidth *= m_iFontSize;
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iCharWidth *= m_iHorizontalScale;
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iCharWidth /= 100;
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}
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int32_t iCharWidthValid = iCharWidth.ValueOrDefault(0);
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pCurChar->m_iCharWidth = iCharWidthValid;
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iLineWidth += iCharWidthValid;
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m_pCurLine->IncrementArabicCharCount();
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if (!m_bSingleLine && IsGreaterThanLineWidth(iLineWidth))
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return EndBreak(CFX_BreakType::Line);
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return CFX_BreakType::None;
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}
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CFX_BreakType CFX_TxtBreak::AppendChar_Others(CFX_Char* pCurChar) {
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FX_CHARTYPE chartype = pCurChar->GetCharType();
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int32_t& iLineWidth = m_pCurLine->m_iWidth;
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FX_SAFE_INT32 iCharWidth = 0;
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m_eCharType = chartype;
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wchar_t wch = pCurChar->char_code();
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wchar_t wForm = wch;
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if (m_bCombText) {
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iCharWidth = m_iCombWidth;
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} else {
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int32_t iCharWidthOut;
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if (m_pFont && m_pFont->GetCharWidth(wForm, &iCharWidthOut))
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iCharWidth = iCharWidthOut;
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else
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iCharWidth = 0;
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iCharWidth *= m_iFontSize;
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iCharWidth *= m_iHorizontalScale;
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iCharWidth /= 100;
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}
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iCharWidth += m_iCharSpace;
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int32_t iCharWidthValid = iCharWidth.ValueOrDefault(0);
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pCurChar->m_iCharWidth = iCharWidthValid;
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iLineWidth += iCharWidthValid;
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if (!m_bSingleLine && chartype != FX_CHARTYPE::kSpace &&
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IsGreaterThanLineWidth(iLineWidth)) {
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return EndBreak(CFX_BreakType::Line);
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}
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return CFX_BreakType::None;
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}
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CFX_BreakType CFX_TxtBreak::AppendChar(wchar_t wch) {
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FX_CHARTYPE chartype = FX_GetCharType(wch);
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m_pCurLine->m_LineChars.emplace_back(wch, m_iHorizontalScale,
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m_iVerticalScale);
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CFX_Char* pCurChar = &m_pCurLine->m_LineChars.back();
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pCurChar->m_dwCharStyles = m_iAlignment | (1 << 8);
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CFX_BreakType dwRet1 = CFX_BreakType::None;
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if (chartype != FX_CHARTYPE::kCombination &&
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GetUnifiedCharType(m_eCharType) != GetUnifiedCharType(chartype) &&
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m_eCharType != FX_CHARTYPE::kUnknown && !m_bSingleLine &&
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IsGreaterThanLineWidth(m_pCurLine->m_iWidth) &&
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(m_eCharType != FX_CHARTYPE::kSpace ||
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chartype != FX_CHARTYPE::kControl)) {
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dwRet1 = EndBreak(CFX_BreakType::Line);
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if (!m_pCurLine->m_LineChars.empty())
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pCurChar = &m_pCurLine->m_LineChars.back();
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}
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CFX_BreakType dwRet2 = CFX_BreakType::None;
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if (wch == m_wParagraphBreakChar) {
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// This is handled in AppendChar_Control, but it seems like \n and \r
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// don't get matched as control characters so we go into AppendChar_other
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// and never detect the new paragraph ...
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dwRet2 = CFX_BreakType::Paragraph;
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EndBreak(dwRet2);
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} else {
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switch (chartype) {
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case FX_CHARTYPE::kTab:
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AppendChar_Tab(pCurChar);
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break;
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case FX_CHARTYPE::kControl:
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dwRet2 = AppendChar_Control(pCurChar);
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break;
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case FX_CHARTYPE::kCombination:
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AppendChar_Combination(pCurChar);
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break;
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case FX_CHARTYPE::kArabicAlef:
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case FX_CHARTYPE::kArabicSpecial:
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case FX_CHARTYPE::kArabicDistortion:
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case FX_CHARTYPE::kArabicNormal:
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case FX_CHARTYPE::kArabicForm:
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case FX_CHARTYPE::kArabic:
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dwRet2 = AppendChar_Arabic(pCurChar);
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break;
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case FX_CHARTYPE::kUnknown:
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case FX_CHARTYPE::kSpace:
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case FX_CHARTYPE::kNumeric:
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case FX_CHARTYPE::kNormal:
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default:
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dwRet2 = AppendChar_Others(pCurChar);
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break;
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}
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}
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return std::max(dwRet1, dwRet2);
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}
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bool CFX_TxtBreak::EndBreak_SplitLine(CFX_BreakLine* pNextLine,
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bool bAllChars) {
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bool bDone = false;
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CFX_Char* pTC;
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if (!m_bSingleLine && IsGreaterThanLineWidth(m_pCurLine->m_iWidth)) {
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pTC = m_pCurLine->GetChar(m_pCurLine->m_LineChars.size() - 1);
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switch (pTC->GetCharType()) {
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case FX_CHARTYPE::kTab:
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case FX_CHARTYPE::kControl:
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case FX_CHARTYPE::kSpace:
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break;
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default:
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SplitTextLine(m_pCurLine.Get(), pNextLine, bAllChars);
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bDone = true;
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break;
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}
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}
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CFX_BreakPiece tp;
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if (bAllChars && !bDone) {
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int32_t iEndPos = m_pCurLine->m_iWidth;
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GetBreakPos(&m_pCurLine->m_LineChars, bAllChars, true, &iEndPos);
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}
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return false;
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}
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void CFX_TxtBreak::EndBreak_BidiLine(std::deque<FX_TPO>* tpos,
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CFX_BreakType dwStatus) {
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CFX_BreakPiece tp;
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FX_TPO tpo;
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CFX_Char* pTC;
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std::vector<CFX_Char>& chars = m_pCurLine->m_LineChars;
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if (!m_pCurLine->HasArabicChar()) {
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tp.m_dwStatus = dwStatus;
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tp.m_iStartPos = m_pCurLine->m_iStart;
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tp.m_iWidth = m_pCurLine->m_iWidth;
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tp.m_iStartChar = 0;
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tp.m_iChars = m_pCurLine->m_LineChars.size();
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tp.m_pChars = &m_pCurLine->m_LineChars;
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pTC = &chars[0];
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tp.m_dwCharStyles = pTC->m_dwCharStyles;
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tp.m_iHorizontalScale = pTC->horizonal_scale();
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tp.m_iVerticalScale = pTC->vertical_scale();
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m_pCurLine->m_LinePieces.push_back(tp);
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tpos->push_back({0, 0});
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return;
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}
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size_t iBidiNum = 0;
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for (size_t i = 0; i < m_pCurLine->m_LineChars.size(); ++i) {
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pTC = &chars[i];
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pTC->m_iBidiPos = static_cast<int32_t>(i);
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if (pTC->GetCharType() != FX_CHARTYPE::kControl)
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iBidiNum = i;
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if (i == 0)
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pTC->m_iBidiLevel = 1;
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}
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CFX_Char::BidiLine(&chars, iBidiNum + 1);
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tp.m_dwStatus = CFX_BreakType::Piece;
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tp.m_iStartPos = m_pCurLine->m_iStart;
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tp.m_pChars = &m_pCurLine->m_LineChars;
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int32_t iBidiLevel = -1;
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int32_t iCharWidth;
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int32_t i = 0;
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int32_t j = -1;
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int32_t iCount = pdfium::CollectionSize<int32_t>(m_pCurLine->m_LineChars);
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while (i < iCount) {
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pTC = &chars[i];
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if (iBidiLevel < 0) {
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iBidiLevel = pTC->m_iBidiLevel;
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tp.m_iWidth = 0;
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tp.m_iBidiLevel = iBidiLevel;
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tp.m_iBidiPos = pTC->m_iBidiOrder;
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tp.m_dwCharStyles = pTC->m_dwCharStyles;
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tp.m_iHorizontalScale = pTC->horizonal_scale();
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tp.m_iVerticalScale = pTC->vertical_scale();
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tp.m_dwStatus = CFX_BreakType::Piece;
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}
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if (iBidiLevel != pTC->m_iBidiLevel ||
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pTC->m_dwStatus != CFX_BreakType::None) {
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if (iBidiLevel == pTC->m_iBidiLevel) {
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tp.m_dwStatus = pTC->m_dwStatus;
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iCharWidth = pTC->m_iCharWidth;
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if (iCharWidth > 0)
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tp.m_iWidth += iCharWidth;
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i++;
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}
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tp.m_iChars = i - tp.m_iStartChar;
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m_pCurLine->m_LinePieces.push_back(tp);
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tp.m_iStartPos += tp.m_iWidth;
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tp.m_iStartChar = i;
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tpo.index = ++j;
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tpo.pos = tp.m_iBidiPos;
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tpos->push_back(tpo);
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iBidiLevel = -1;
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} else {
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iCharWidth = pTC->m_iCharWidth;
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if (iCharWidth > 0)
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tp.m_iWidth += iCharWidth;
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i++;
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}
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}
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if (i > tp.m_iStartChar) {
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tp.m_dwStatus = dwStatus;
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tp.m_iChars = i - tp.m_iStartChar;
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m_pCurLine->m_LinePieces.push_back(tp);
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tpo.index = ++j;
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tpo.pos = tp.m_iBidiPos;
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tpos->push_back(tpo);
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}
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if (j > -1) {
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if (j > 0) {
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std::sort(tpos->begin(), tpos->end());
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int32_t iStartPos = 0;
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for (i = 0; i <= j; i++) {
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tpo = (*tpos)[i];
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CFX_BreakPiece& ttp = m_pCurLine->m_LinePieces[tpo.index];
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ttp.m_iStartPos = iStartPos;
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iStartPos += ttp.m_iWidth;
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}
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}
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m_pCurLine->m_LinePieces[j].m_dwStatus = dwStatus;
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}
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}
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void CFX_TxtBreak::EndBreak_Alignment(const std::deque<FX_TPO>& tpos,
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bool bAllChars,
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CFX_BreakType dwStatus) {
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int32_t iNetWidth = m_pCurLine->m_iWidth;
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int32_t iGapChars = 0;
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bool bFind = false;
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for (auto it = tpos.rbegin(); it != tpos.rend(); ++it) {
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CFX_BreakPiece& ttp = m_pCurLine->m_LinePieces[it->index];
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if (!bFind)
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iNetWidth = ttp.GetEndPos();
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bool bArabic = FX_IsOdd(ttp.m_iBidiLevel);
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int32_t j = bArabic ? 0 : ttp.m_iChars - 1;
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while (j > -1 && j < ttp.m_iChars) {
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const CFX_Char* pTC = ttp.GetChar(j);
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if (pTC->m_eLineBreakType == FX_LINEBREAKTYPE::kDIRECT_BRK)
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iGapChars++;
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if (!bFind || !bAllChars) {
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FX_CHARTYPE chartype = pTC->GetCharType();
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if (chartype == FX_CHARTYPE::kSpace ||
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chartype == FX_CHARTYPE::kControl) {
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if (!bFind && bAllChars && pTC->m_iCharWidth > 0)
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iNetWidth -= pTC->m_iCharWidth;
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} else {
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bFind = true;
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if (!bAllChars)
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break;
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}
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}
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j += bArabic ? 1 : -1;
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}
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if (!bAllChars && bFind)
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break;
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}
|
|
|
|
int32_t iOffset = m_iLineWidth - iNetWidth;
|
|
if (iGapChars > 0 && m_iAlignment & CFX_TxtLineAlignment_Justified &&
|
|
dwStatus != CFX_BreakType::Paragraph) {
|
|
int32_t iStart = -1;
|
|
for (auto& tpo : tpos) {
|
|
CFX_BreakPiece& ttp = m_pCurLine->m_LinePieces[tpo.index];
|
|
if (iStart < -1)
|
|
iStart = ttp.m_iStartPos;
|
|
else
|
|
ttp.m_iStartPos = iStart;
|
|
|
|
for (int32_t j = 0; j < ttp.m_iChars && iGapChars > 0; j++, iGapChars--) {
|
|
CFX_Char* pTC = ttp.GetChar(j);
|
|
if (pTC->m_eLineBreakType != FX_LINEBREAKTYPE::kDIRECT_BRK ||
|
|
pTC->m_iCharWidth < 0) {
|
|
continue;
|
|
}
|
|
int32_t k = iOffset / iGapChars;
|
|
pTC->m_iCharWidth += k;
|
|
ttp.m_iWidth += k;
|
|
iOffset -= k;
|
|
}
|
|
iStart += ttp.m_iWidth;
|
|
}
|
|
} else if (m_iAlignment & CFX_TxtLineAlignment_Center ||
|
|
m_iAlignment & CFX_TxtLineAlignment_Right) {
|
|
if (m_iAlignment & CFX_TxtLineAlignment_Center &&
|
|
!(m_iAlignment & CFX_TxtLineAlignment_Right)) {
|
|
iOffset /= 2;
|
|
}
|
|
if (iOffset > 0) {
|
|
for (auto& ttp : m_pCurLine->m_LinePieces)
|
|
ttp.m_iStartPos += iOffset;
|
|
}
|
|
}
|
|
}
|
|
|
|
CFX_BreakType CFX_TxtBreak::EndBreak(CFX_BreakType dwStatus) {
|
|
ASSERT(dwStatus != CFX_BreakType::None);
|
|
|
|
if (!m_pCurLine->m_LinePieces.empty()) {
|
|
if (dwStatus != CFX_BreakType::Piece)
|
|
m_pCurLine->m_LinePieces.back().m_dwStatus = dwStatus;
|
|
return m_pCurLine->m_LinePieces.back().m_dwStatus;
|
|
}
|
|
|
|
if (HasLine()) {
|
|
if (m_Lines[m_iReadyLineIndex].m_LinePieces.empty())
|
|
return CFX_BreakType::None;
|
|
|
|
if (dwStatus != CFX_BreakType::Piece)
|
|
m_Lines[m_iReadyLineIndex].m_LinePieces.back().m_dwStatus = dwStatus;
|
|
return m_Lines[m_iReadyLineIndex].m_LinePieces.back().m_dwStatus;
|
|
}
|
|
|
|
if (m_pCurLine->m_LineChars.empty())
|
|
return CFX_BreakType::None;
|
|
|
|
m_pCurLine->m_LineChars.back().m_dwStatus = dwStatus;
|
|
if (dwStatus == CFX_BreakType::Piece)
|
|
return dwStatus;
|
|
|
|
m_iReadyLineIndex = m_pCurLine == &m_Lines[0] ? 0 : 1;
|
|
CFX_BreakLine* pNextLine = &m_Lines[1 - m_iReadyLineIndex];
|
|
bool bAllChars = m_iAlignment > CFX_TxtLineAlignment_Right;
|
|
if (!EndBreak_SplitLine(pNextLine, bAllChars)) {
|
|
std::deque<FX_TPO> tpos;
|
|
EndBreak_BidiLine(&tpos, dwStatus);
|
|
if (m_iAlignment > CFX_TxtLineAlignment_Left)
|
|
EndBreak_Alignment(tpos, bAllChars, dwStatus);
|
|
}
|
|
|
|
m_pCurLine = pNextLine;
|
|
CFX_Char* pTC = GetLastChar(0, false, false);
|
|
m_eCharType = pTC ? pTC->GetCharType() : FX_CHARTYPE::kUnknown;
|
|
|
|
return dwStatus;
|
|
}
|
|
|
|
int32_t CFX_TxtBreak::GetBreakPos(std::vector<CFX_Char>* pChars,
|
|
bool bAllChars,
|
|
bool bOnlyBrk,
|
|
int32_t* pEndPos) {
|
|
std::vector<CFX_Char>& chars = *pChars;
|
|
int32_t iLength = pdfium::CollectionSize<int32_t>(chars) - 1;
|
|
if (iLength < 1)
|
|
return iLength;
|
|
|
|
int32_t iBreak = -1;
|
|
int32_t iBreakPos = -1;
|
|
int32_t iIndirect = -1;
|
|
int32_t iIndirectPos = -1;
|
|
int32_t iLast = -1;
|
|
int32_t iLastPos = -1;
|
|
if (m_bSingleLine || *pEndPos <= m_iLineWidth) {
|
|
if (!bAllChars)
|
|
return iLength;
|
|
|
|
iBreak = iLength;
|
|
iBreakPos = *pEndPos;
|
|
}
|
|
|
|
FX_LINEBREAKTYPE eType;
|
|
FX_BREAKPROPERTY nCur;
|
|
FX_BREAKPROPERTY nNext;
|
|
CFX_Char* pCur = &chars[iLength--];
|
|
if (bAllChars)
|
|
pCur->m_eLineBreakType = FX_LINEBREAKTYPE::kUNKNOWN;
|
|
|
|
nNext = FX_GetBreakProperty(pCur->char_code());
|
|
int32_t iCharWidth = pCur->m_iCharWidth;
|
|
if (iCharWidth > 0)
|
|
*pEndPos -= iCharWidth;
|
|
|
|
while (iLength >= 0) {
|
|
pCur = &chars[iLength];
|
|
nCur = FX_GetBreakProperty(pCur->char_code());
|
|
if (nNext == FX_BREAKPROPERTY::kSP)
|
|
eType = FX_LINEBREAKTYPE::kPROHIBITED_BRK;
|
|
else
|
|
eType = GetLineBreakTypeFromPair(nCur, nNext);
|
|
if (bAllChars)
|
|
pCur->m_eLineBreakType = eType;
|
|
if (!bOnlyBrk) {
|
|
if (m_bSingleLine || *pEndPos <= m_iLineWidth ||
|
|
nCur == FX_BREAKPROPERTY::kSP) {
|
|
if (eType == FX_LINEBREAKTYPE::kDIRECT_BRK && iBreak < 0) {
|
|
iBreak = iLength;
|
|
iBreakPos = *pEndPos;
|
|
if (!bAllChars)
|
|
return iLength;
|
|
} else if (eType == FX_LINEBREAKTYPE::kINDIRECT_BRK && iIndirect < 0) {
|
|
iIndirect = iLength;
|
|
iIndirectPos = *pEndPos;
|
|
}
|
|
if (iLast < 0) {
|
|
iLast = iLength;
|
|
iLastPos = *pEndPos;
|
|
}
|
|
}
|
|
iCharWidth = pCur->m_iCharWidth;
|
|
if (iCharWidth > 0)
|
|
*pEndPos -= iCharWidth;
|
|
}
|
|
nNext = nCur;
|
|
iLength--;
|
|
}
|
|
if (bOnlyBrk)
|
|
return 0;
|
|
if (iBreak > -1) {
|
|
*pEndPos = iBreakPos;
|
|
return iBreak;
|
|
}
|
|
if (iIndirect > -1) {
|
|
*pEndPos = iIndirectPos;
|
|
return iIndirect;
|
|
}
|
|
if (iLast > -1) {
|
|
*pEndPos = iLastPos;
|
|
return iLast;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void CFX_TxtBreak::SplitTextLine(CFX_BreakLine* pCurLine,
|
|
CFX_BreakLine* pNextLine,
|
|
bool bAllChars) {
|
|
ASSERT(pCurLine);
|
|
ASSERT(pNextLine);
|
|
|
|
if (pCurLine->m_LineChars.size() < 2)
|
|
return;
|
|
|
|
int32_t iEndPos = pCurLine->m_iWidth;
|
|
std::vector<CFX_Char>& curChars = pCurLine->m_LineChars;
|
|
int32_t iCharPos = GetBreakPos(&curChars, bAllChars, false, &iEndPos);
|
|
if (iCharPos < 0)
|
|
iCharPos = 0;
|
|
|
|
iCharPos++;
|
|
if (iCharPos >= pdfium::CollectionSize<int32_t>(pCurLine->m_LineChars)) {
|
|
pNextLine->Clear();
|
|
CFX_Char* pTC = &curChars[iCharPos - 1];
|
|
pTC->m_eLineBreakType = FX_LINEBREAKTYPE::kUNKNOWN;
|
|
return;
|
|
}
|
|
|
|
pNextLine->m_LineChars =
|
|
std::vector<CFX_Char>(curChars.begin() + iCharPos, curChars.end());
|
|
curChars.erase(curChars.begin() + iCharPos, curChars.end());
|
|
pCurLine->m_iWidth = iEndPos;
|
|
CFX_Char* pTC = &curChars[iCharPos - 1];
|
|
pTC->m_eLineBreakType = FX_LINEBREAKTYPE::kUNKNOWN;
|
|
int32_t iWidth = 0;
|
|
for (size_t i = 0; i < pNextLine->m_LineChars.size(); ++i) {
|
|
if (pNextLine->m_LineChars[i].GetCharType() >= FX_CHARTYPE::kArabicAlef) {
|
|
pCurLine->DecrementArabicCharCount();
|
|
pNextLine->IncrementArabicCharCount();
|
|
}
|
|
iWidth += std::max(0, pNextLine->m_LineChars[i].m_iCharWidth);
|
|
pNextLine->m_LineChars[i].m_dwStatus = CFX_BreakType::None;
|
|
}
|
|
pNextLine->m_iWidth = iWidth;
|
|
}
|
|
|
|
struct FX_FORMCHAR {
|
|
uint16_t wch;
|
|
uint16_t wForm;
|
|
int32_t iWidth;
|
|
};
|
|
|
|
size_t CFX_TxtBreak::GetDisplayPos(const Run* pTxtRun,
|
|
TextCharPos* pCharPos) const {
|
|
if (!pTxtRun || pTxtRun->iLength < 1)
|
|
return 0;
|
|
|
|
Engine* pEngine = pTxtRun->pEdtEngine;
|
|
const wchar_t* pStr = pTxtRun->wsStr.c_str();
|
|
int32_t* pWidths = pTxtRun->pWidths;
|
|
int32_t iLength = pTxtRun->iLength - 1;
|
|
RetainPtr<CFGAS_GEFont> pFont = pTxtRun->pFont;
|
|
uint32_t dwStyles = pTxtRun->dwStyles;
|
|
CFX_RectF rtText(*pTxtRun->pRect);
|
|
bool bRTLPiece = (pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_OddBidiLevel) != 0;
|
|
float fFontSize = pTxtRun->fFontSize;
|
|
int32_t iFontSize = FXSYS_roundf(fFontSize * 20.0f);
|
|
int32_t iAscent = pFont->GetAscent();
|
|
int32_t iDescent = pFont->GetDescent();
|
|
int32_t iMaxHeight = iAscent - iDescent;
|
|
float fFontHeight = fFontSize;
|
|
float fAscent = fFontHeight * iAscent / iMaxHeight;
|
|
float fX = rtText.left;
|
|
float fY;
|
|
float fCharWidth;
|
|
int32_t iHorScale = pTxtRun->iHorizontalScale;
|
|
int32_t iVerScale = pTxtRun->iVerticalScale;
|
|
bool bSkipSpace = pTxtRun->bSkipSpace;
|
|
FX_FORMCHAR formChars[3];
|
|
float fYBase;
|
|
|
|
if (bRTLPiece)
|
|
fX = rtText.right();
|
|
|
|
fYBase = rtText.top + (rtText.height - fFontSize) / 2.0f;
|
|
fY = fYBase + fAscent;
|
|
|
|
size_t szCount = 0;
|
|
int32_t iNext = 0;
|
|
wchar_t wPrev = 0xFEFF;
|
|
wchar_t wNext = 0xFEFF;
|
|
wchar_t wForm = 0xFEFF;
|
|
wchar_t wLast = 0xFEFF;
|
|
bool bShadda = false;
|
|
bool bLam = false;
|
|
for (int32_t i = 0; i <= iLength; i++) {
|
|
int32_t iAbsolute = i + pTxtRun->iStart;
|
|
int32_t iWidth;
|
|
wchar_t wch;
|
|
if (pEngine) {
|
|
wch = pEngine->GetChar(iAbsolute);
|
|
iWidth = pEngine->GetWidthOfChar(iAbsolute);
|
|
} else {
|
|
wch = *pStr++;
|
|
iWidth = *pWidths++;
|
|
}
|
|
|
|
FX_CHARTYPE chartype = FX_GetCharType(wch);
|
|
if (chartype == FX_CHARTYPE::kArabicAlef && iWidth == 0) {
|
|
wPrev = 0xFEFF;
|
|
wLast = wch;
|
|
continue;
|
|
}
|
|
|
|
if (chartype >= FX_CHARTYPE::kArabicAlef) {
|
|
if (i < iLength) {
|
|
if (pEngine) {
|
|
iNext = i + 1;
|
|
while (iNext <= iLength) {
|
|
int32_t iNextAbsolute = iNext + pTxtRun->iStart;
|
|
wNext = pEngine->GetChar(iNextAbsolute);
|
|
if (FX_GetCharType(wNext) != FX_CHARTYPE::kCombination)
|
|
break;
|
|
|
|
iNext++;
|
|
}
|
|
if (iNext > iLength)
|
|
wNext = 0xFEFF;
|
|
} else {
|
|
int32_t j = -1;
|
|
do {
|
|
j++;
|
|
if (i + j >= iLength)
|
|
break;
|
|
|
|
wNext = pStr[j];
|
|
} while (FX_GetCharType(wNext) == FX_CHARTYPE::kCombination);
|
|
if (i + j >= iLength)
|
|
wNext = 0xFEFF;
|
|
}
|
|
} else {
|
|
wNext = 0xFEFF;
|
|
}
|
|
|
|
wForm = pdfium::arabic::GetFormChar(wch, wPrev, wNext);
|
|
bLam = (wPrev == 0x0644 && wch == 0x0644 && wNext == 0x0647);
|
|
} else if (chartype == FX_CHARTYPE::kCombination) {
|
|
wForm = wch;
|
|
if (wch >= 0x064C && wch <= 0x0651) {
|
|
if (bShadda) {
|
|
wForm = 0xFEFF;
|
|
bShadda = false;
|
|
} else {
|
|
wNext = 0xFEFF;
|
|
if (pEngine) {
|
|
iNext = i + 1;
|
|
if (iNext <= iLength) {
|
|
int32_t iNextAbsolute = iNext + pTxtRun->iStart;
|
|
wNext = pEngine->GetChar(iNextAbsolute);
|
|
}
|
|
} else {
|
|
if (i < iLength)
|
|
wNext = *pStr;
|
|
}
|
|
if (wch == 0x0651) {
|
|
if (wNext >= 0x064C && wNext <= 0x0650) {
|
|
wForm = FX_GetArabicFromShaddaTable(wNext);
|
|
bShadda = true;
|
|
}
|
|
} else {
|
|
if (wNext == 0x0651) {
|
|
wForm = FX_GetArabicFromShaddaTable(wch);
|
|
bShadda = true;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
bShadda = false;
|
|
}
|
|
} else if (chartype == FX_CHARTYPE::kNumeric) {
|
|
wForm = wch;
|
|
} else if (wch == L'.') {
|
|
wForm = wch;
|
|
} else if (wch == L',') {
|
|
wForm = wch;
|
|
} else if (bRTLPiece) {
|
|
wForm = FX_GetMirrorChar(wch);
|
|
} else {
|
|
wForm = wch;
|
|
}
|
|
if (chartype != FX_CHARTYPE::kCombination)
|
|
bShadda = false;
|
|
if (chartype < FX_CHARTYPE::kArabicAlef)
|
|
bLam = false;
|
|
|
|
bool bEmptyChar =
|
|
(chartype >= FX_CHARTYPE::kTab && chartype <= FX_CHARTYPE::kControl);
|
|
if (wForm == 0xFEFF)
|
|
bEmptyChar = true;
|
|
|
|
int32_t iForms = bLam ? 3 : 1;
|
|
szCount += (bEmptyChar && bSkipSpace) ? 0 : iForms;
|
|
if (!pCharPos) {
|
|
if (iWidth > 0)
|
|
wPrev = wch;
|
|
wLast = wch;
|
|
continue;
|
|
}
|
|
|
|
int32_t iCharWidth = iWidth;
|
|
if (iCharWidth < 0)
|
|
iCharWidth = -iCharWidth;
|
|
|
|
iCharWidth /= iFontSize;
|
|
formChars[0].wch = wch;
|
|
formChars[0].wForm = wForm;
|
|
formChars[0].iWidth = iCharWidth;
|
|
if (bLam) {
|
|
formChars[1].wForm = 0x0651;
|
|
iCharWidth = 0;
|
|
pFont->GetCharWidth(0x0651, &iCharWidth);
|
|
formChars[1].iWidth = iCharWidth;
|
|
formChars[2].wForm = 0x0670;
|
|
iCharWidth = 0;
|
|
pFont->GetCharWidth(0x0670, &iCharWidth);
|
|
formChars[2].iWidth = iCharWidth;
|
|
}
|
|
|
|
for (int32_t j = 0; j < iForms; j++) {
|
|
wForm = (wchar_t)formChars[j].wForm;
|
|
iCharWidth = formChars[j].iWidth;
|
|
if (j > 0) {
|
|
chartype = FX_CHARTYPE::kCombination;
|
|
wch = wForm;
|
|
wLast = (wchar_t)formChars[j - 1].wForm;
|
|
}
|
|
if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
|
|
pCharPos->m_GlyphIndex = pFont->GetGlyphIndex(wForm);
|
|
#if defined(OS_MACOSX)
|
|
pCharPos->m_ExtGID = pCharPos->m_GlyphIndex;
|
|
#endif
|
|
// TODO(npm): change widths in this method to unsigned to avoid implicit
|
|
// cast in the following line.
|
|
pCharPos->m_FontCharWidth = iCharWidth;
|
|
}
|
|
|
|
fCharWidth = fFontSize * iCharWidth / 1000.0f;
|
|
if (bRTLPiece && chartype != FX_CHARTYPE::kCombination)
|
|
fX -= fCharWidth;
|
|
|
|
if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
|
|
pCharPos->m_Origin = CFX_PointF(fX, fY);
|
|
|
|
if ((dwStyles & FX_LAYOUTSTYLE_CombText) != 0) {
|
|
int32_t iFormWidth = iCharWidth;
|
|
pFont->GetCharWidth(wForm, &iFormWidth);
|
|
float fOffset = fFontSize * (iCharWidth - iFormWidth) / 2000.0f;
|
|
pCharPos->m_Origin.x += fOffset;
|
|
}
|
|
|
|
if (chartype == FX_CHARTYPE::kCombination) {
|
|
FX_RECT rtBBox;
|
|
if (pFont->GetCharBBox(wForm, &rtBBox)) {
|
|
pCharPos->m_Origin.y =
|
|
fYBase + fFontSize - fFontSize * rtBBox.Height() / iMaxHeight;
|
|
}
|
|
if (wForm == wch && wLast != 0xFEFF) {
|
|
if (FX_GetCharType(wLast) == FX_CHARTYPE::kCombination) {
|
|
FX_RECT rtBox;
|
|
if (pFont->GetCharBBox(wLast, &rtBox))
|
|
pCharPos->m_Origin.y -= fFontSize * rtBox.Height() / iMaxHeight;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (!bRTLPiece && chartype != FX_CHARTYPE::kCombination)
|
|
fX += fCharWidth;
|
|
|
|
if (!bEmptyChar || (bEmptyChar && !bSkipSpace)) {
|
|
pCharPos->m_bGlyphAdjust = true;
|
|
pCharPos->m_AdjustMatrix[0] = -1;
|
|
pCharPos->m_AdjustMatrix[1] = 0;
|
|
pCharPos->m_AdjustMatrix[2] = 0;
|
|
pCharPos->m_AdjustMatrix[3] = 1;
|
|
|
|
if (iHorScale != 100 || iVerScale != 100) {
|
|
pCharPos->m_AdjustMatrix[0] =
|
|
pCharPos->m_AdjustMatrix[0] * iHorScale / 100.0f;
|
|
pCharPos->m_AdjustMatrix[1] =
|
|
pCharPos->m_AdjustMatrix[1] * iHorScale / 100.0f;
|
|
pCharPos->m_AdjustMatrix[2] =
|
|
pCharPos->m_AdjustMatrix[2] * iVerScale / 100.0f;
|
|
pCharPos->m_AdjustMatrix[3] =
|
|
pCharPos->m_AdjustMatrix[3] * iVerScale / 100.0f;
|
|
}
|
|
pCharPos++;
|
|
}
|
|
}
|
|
if (iWidth > 0)
|
|
wPrev = static_cast<wchar_t>(formChars[0].wch);
|
|
wLast = wch;
|
|
}
|
|
return szCount;
|
|
}
|
|
|
|
std::vector<CFX_RectF> CFX_TxtBreak::GetCharRects(const Run* pTxtRun,
|
|
bool bCharBBox) const {
|
|
if (!pTxtRun || pTxtRun->iLength < 1)
|
|
return std::vector<CFX_RectF>();
|
|
|
|
Engine* pEngine = pTxtRun->pEdtEngine;
|
|
const wchar_t* pStr = pTxtRun->wsStr.c_str();
|
|
int32_t* pWidths = pTxtRun->pWidths;
|
|
int32_t iLength = pTxtRun->iLength;
|
|
CFX_RectF rect(*pTxtRun->pRect);
|
|
float fFontSize = pTxtRun->fFontSize;
|
|
float fScale = fFontSize / 1000.0f;
|
|
RetainPtr<CFGAS_GEFont> pFont = pTxtRun->pFont;
|
|
if (!pFont)
|
|
bCharBBox = false;
|
|
|
|
FX_RECT bbox;
|
|
if (bCharBBox)
|
|
bCharBBox = pFont->GetBBox(&bbox);
|
|
|
|
float fLeft = std::max(0.0f, bbox.left * fScale);
|
|
float fHeight = fabs(bbox.Height() * fScale);
|
|
bool bRTLPiece = !!(pTxtRun->dwCharStyles & FX_TXTCHARSTYLE_OddBidiLevel);
|
|
bool bSingleLine = !!(pTxtRun->dwStyles & FX_LAYOUTSTYLE_SingleLine);
|
|
bool bCombText = !!(pTxtRun->dwStyles & FX_LAYOUTSTYLE_CombText);
|
|
wchar_t wch;
|
|
int32_t iCharSize;
|
|
float fCharSize;
|
|
float fStart = bRTLPiece ? rect.right() : rect.left;
|
|
|
|
std::vector<CFX_RectF> rtArray(iLength);
|
|
for (int32_t i = 0; i < iLength; i++) {
|
|
int32_t iAbsolute = i + pTxtRun->iStart;
|
|
if (pEngine) {
|
|
wch = pEngine->GetChar(iAbsolute);
|
|
iCharSize = pEngine->GetWidthOfChar(iAbsolute);
|
|
} else {
|
|
wch = *pStr++;
|
|
iCharSize = *pWidths++;
|
|
}
|
|
fCharSize = static_cast<float>(iCharSize) / kConversionFactor;
|
|
bool bRet = (!bSingleLine && IsCtrlCode(wch));
|
|
if (!(wch == L'\v' || wch == L'\f' || wch == 0x2028 || wch == 0x2029 ||
|
|
wch == L'\n')) {
|
|
bRet = false;
|
|
}
|
|
if (bRet)
|
|
fCharSize = fFontSize / 2.0f;
|
|
rect.left = fStart;
|
|
if (bRTLPiece) {
|
|
rect.left -= fCharSize;
|
|
fStart -= fCharSize;
|
|
} else {
|
|
fStart += fCharSize;
|
|
}
|
|
rect.width = fCharSize;
|
|
|
|
if (bCharBBox && !bRet) {
|
|
int32_t iCharWidth = 1000;
|
|
pFont->GetCharWidth(wch, &iCharWidth);
|
|
float fRTLeft = 0, fCharWidth = 0;
|
|
if (iCharWidth > 0) {
|
|
fCharWidth = iCharWidth * fScale;
|
|
fRTLeft = fLeft;
|
|
if (bCombText)
|
|
fRTLeft = (rect.width - fCharWidth) / 2.0f;
|
|
}
|
|
CFX_RectF rtBBoxF;
|
|
rtBBoxF.left = rect.left + fRTLeft;
|
|
rtBBoxF.top = rect.top + (rect.height - fHeight) / 2.0f;
|
|
rtBBoxF.width = fCharWidth;
|
|
rtBBoxF.height = fHeight;
|
|
rtBBoxF.top = std::max(rtBBoxF.top, 0.0f);
|
|
rtArray[i] = rtBBoxF;
|
|
continue;
|
|
}
|
|
rtArray[i] = rect;
|
|
}
|
|
return rtArray;
|
|
}
|
|
|
|
CFX_TxtBreak::Engine::~Engine() = default;
|
|
|
|
CFX_TxtBreak::Run::Run() = default;
|
|
|
|
CFX_TxtBreak::Run::~Run() = default;
|
|
|
|
CFX_TxtBreak::Run::Run(const CFX_TxtBreak::Run& other) = default;
|