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// Copyright 2017 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 "xfa/fgas/layout/cfx_break.h"
#include <algorithm>
#include <vector>
#include "third_party/base/stl_util.h"
namespace {
const int kMinimumTabWidth = 160000;
} // namespace
CFX_Break::CFX_Break(uint32_t dwLayoutStyles)
: m_eCharType(FX_CHARTYPE_Unknown),
m_bSingleLine(false),
m_bCombText(false),
m_dwIdentity(0),
m_dwLayoutStyles(dwLayoutStyles),
m_iLineStart(0),
m_iLineWidth(2000000),
m_wParagraphBreakChar(L'\n'),
m_iFontSize(240),
m_iTabWidth(720000),
m_iHorizontalScale(100),
m_iVerticalScale(100),
m_iTolerance(0),
m_iCharSpace(0),
m_iDefChar(0),
m_wDefChar(0xFEFF),
m_pFont(nullptr),
m_pCurLine(nullptr),
m_iReadyLineIndex(-1) {
m_pCurLine = &m_Line[0];
}
CFX_Break::~CFX_Break() {}
void CFX_Break::Reset() {
m_eCharType = FX_CHARTYPE_Unknown;
m_Line[0].Clear();
m_Line[1].Clear();
}
void CFX_Break::SetLayoutStyles(uint32_t dwLayoutStyles) {
m_dwLayoutStyles = dwLayoutStyles;
m_bSingleLine = (m_dwLayoutStyles & FX_LAYOUTSTYLE_SingleLine) != 0;
m_bCombText = (m_dwLayoutStyles & FX_LAYOUTSTYLE_CombText) != 0;
}
void CFX_Break::SetHorizontalScale(int32_t iScale) {
iScale = std::max(iScale, 0);
if (m_iHorizontalScale == iScale)
return;
SetBreakStatus();
m_iHorizontalScale = iScale;
}
void CFX_Break::SetVerticalScale(int32_t iScale) {
if (iScale < 0)
iScale = 0;
if (m_iVerticalScale == iScale)
return;
SetBreakStatus();
m_iVerticalScale = iScale;
}
void CFX_Break::SetFont(const CFX_RetainPtr<CFGAS_GEFont>& pFont) {
if (!pFont || pFont == m_pFont)
return;
SetBreakStatus();
m_pFont = pFont;
FontChanged();
}
void CFX_Break::SetFontSize(float fFontSize) {
int32_t iFontSize = FXSYS_round(fFontSize * 20.0f);
if (m_iFontSize == iFontSize)
return;
SetBreakStatus();
m_iFontSize = iFontSize;
FontChanged();
}
void CFX_Break::SetBreakStatus() {
++m_dwIdentity;
int32_t iCount = m_pCurLine->CountChars();
if (iCount < 1)
return;
CFX_Char* tc = m_pCurLine->GetChar(iCount - 1);
if (tc->m_dwStatus == CFX_BreakType::None)
tc->m_dwStatus = CFX_BreakType::Piece;
}
FX_CHARTYPE CFX_Break::GetUnifiedCharType(FX_CHARTYPE chartype) const {
return chartype >= FX_CHARTYPE_ArabicAlef ? FX_CHARTYPE_Arabic : chartype;
}
void CFX_Break::FontChanged() {
m_iDefChar = 0;
if (!m_pFont || m_wDefChar == 0xFEFF)
return;
m_pFont->GetCharWidth(m_wDefChar, m_iDefChar, false);
m_iDefChar *= m_iFontSize;
}
void CFX_Break::SetTabWidth(float fTabWidth) {
// Note, the use of max here was only done in the TxtBreak code. Leaving this
// in for the RTFBreak code for consistency. If we see issues with tab widths
// we may need to fix this.
m_iTabWidth = std::max(FXSYS_round(fTabWidth * 20000.0f), kMinimumTabWidth);
}
void CFX_Break::SetDefaultChar(wchar_t wch) {
m_wDefChar = wch;
m_iDefChar = 0;
if (m_wDefChar == 0xFEFF || !m_pFont)
return;
m_pFont->GetCharWidth(m_wDefChar, m_iDefChar, false);
if (m_iDefChar < 0)
m_iDefChar = 0;
else
m_iDefChar *= m_iFontSize;
}
void CFX_Break::SetParagraphBreakChar(wchar_t wch) {
if (wch != L'\r' && wch != L'\n')
return;
m_wParagraphBreakChar = wch;
}
void CFX_Break::SetLineBreakTolerance(float fTolerance) {
m_iTolerance = FXSYS_round(fTolerance * 20000.0f);
}
void CFX_Break::SetCharSpace(float fCharSpace) {
m_iCharSpace = FXSYS_round(fCharSpace * 20000.0f);
}
void CFX_Break::SetLineBoundary(float fLineStart, float fLineEnd) {
if (fLineStart > fLineEnd)
return;
m_iLineStart = FXSYS_round(fLineStart * 20000.0f);
m_iLineWidth = FXSYS_round(fLineEnd * 20000.0f);
m_pCurLine->m_iStart = std::min(m_pCurLine->m_iStart, m_iLineWidth);
m_pCurLine->m_iStart = std::max(m_pCurLine->m_iStart, m_iLineStart);
}
CFX_Char* CFX_Break::GetLastChar(int32_t index,
bool bOmitChar,
bool bRichText) const {
std::vector<CFX_Char>& tca = m_pCurLine->m_LineChars;
if (!pdfium::IndexInBounds(tca, index))
return nullptr;
int32_t iStart = pdfium::CollectionSize<int32_t>(tca) - 1;
while (iStart > -1) {
CFX_Char* pTC = &tca[iStart--];
if (((bRichText && pTC->m_iCharWidth < 0) || bOmitChar) &&
pTC->GetCharType() == FX_CHARTYPE_Combination) {
continue;
}
if (--index < 0)
return pTC;
}
return nullptr;
}
int32_t CFX_Break::CountBreakPieces() const {
return HasLine() ? pdfium::CollectionSize<int32_t>(
m_Line[m_iReadyLineIndex].m_LinePieces)
: 0;
}
const CFX_BreakPiece* CFX_Break::GetBreakPieceUnstable(int32_t index) const {
if (!HasLine())
return nullptr;
if (!pdfium::IndexInBounds(m_Line[m_iReadyLineIndex].m_LinePieces, index))
return nullptr;
return &m_Line[m_iReadyLineIndex].m_LinePieces[index];
}
void CFX_Break::ClearBreakPieces() {
if (HasLine())
m_Line[m_iReadyLineIndex].Clear();
m_iReadyLineIndex = -1;
}
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