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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <svtools/scriptedtext.hxx>
#include <vector>
#include <rtl/ustring.hxx>
#include <vcl/outdev.hxx>
#include <vcl/font.hxx>
#include <tools/debug.hxx>
#include <tools/gen.hxx>
#include <com/sun/star/i18n/ScriptType.hpp>
#include <com/sun/star/i18n/XBreakIterator.hpp>
using namespace ::com::sun::star;
class SvtScriptedTextHelper_Impl
{
private:
OutputDevice& mrOutDevice; /// The output device for drawing the text.
vcl::Font maLatinFont; /// The font for latin text portions.
vcl::Font maAsianFont; /// The font for asian text portions.
vcl::Font maCmplxFont; /// The font for complex text portions.
vcl::Font maDefltFont; /// The default font of the output device.
OUString maText; /// The text.
std::vector< sal_Int32 > maPosVec; /// The start position of each text portion.
std::vector< sal_Int16 > maScriptVec; /// The script type of each text portion.
std::vector< sal_Int32 > maWidthVec; /// The output width of each text portion.
Size maTextSize; /// The size the text will take in the current output device.
/** Gets the font of the given script type. */
const vcl::Font& GetFont( sal_uInt16 _nScript ) const;
/** Sets a font on the output device depending on the script type. */
void SetOutDevFont( sal_uInt16 _nScript )
{ mrOutDevice.SetFont( GetFont( _nScript ) ); }
/** Fills maPosVec with positions of all changes of script type.
This method expects correctly initialized maPosVec and maScriptVec. */
void CalculateSizes();
/** Fills maPosVec with positions of all changes of script type and
maScriptVec with the script type of each portion. */
void CalculateBreaks(
const uno::Reference< i18n::XBreakIterator >& _xBreakIter );
public:
/** This constructor sets an output device and fonts for all script types. */
explicit SvtScriptedTextHelper_Impl(
OutputDevice& _rOutDevice );
/** Sets new fonts and recalculates the text width. */
void SetFonts( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _pCmplxFont );
/** Sets a new text and calculates all script breaks and the text width. */
void SetText(
const OUString& _rText,
const uno::Reference< i18n::XBreakIterator >& _xBreakIter );
/** Returns a size struct containing the width and height of the text in the current output device. */
const Size& GetTextSize() const { return maTextSize;}
/** Draws the text in the current output device. */
void DrawText( const Point& _rPos );
};
SvtScriptedTextHelper_Impl::SvtScriptedTextHelper_Impl(
OutputDevice& _rOutDevice ) :
mrOutDevice( _rOutDevice ),
maLatinFont( _rOutDevice.GetFont() ),
maAsianFont( _rOutDevice.GetFont() ),
maCmplxFont( _rOutDevice.GetFont() ),
maDefltFont( _rOutDevice.GetFont() )
{
}
const vcl::Font& SvtScriptedTextHelper_Impl::GetFont( sal_uInt16 _nScript ) const
{
switch( _nScript )
{
case i18n::ScriptType::LATIN: return maLatinFont;
case i18n::ScriptType::ASIAN: return maAsianFont;
case i18n::ScriptType::COMPLEX: return maCmplxFont;
}
return maDefltFont;
}
void SvtScriptedTextHelper_Impl::CalculateSizes()
{
maTextSize.setWidth(0);
maTextSize.setHeight(0);
mrOutDevice.Push(vcl::PushFlags::FONT | vcl::PushFlags::TEXTCOLOR);
// calculate text portion widths and total width
maWidthVec.clear();
if( !maPosVec.empty() )
{
DBG_ASSERT( maPosVec.size() - 1 == maScriptVec.size(),
"SvtScriptedTextHelper_Impl::CalculateWidth - invalid std::vectors" );
sal_Int32 nThisPos = maPosVec[ 0 ];
sal_Int32 nNextPos;
sal_Int32 nPosVecSize = maPosVec.size();
sal_Int32 nPosVecIndex = 1;
sal_Int16 nScript;
sal_Int32 nScriptVecIndex = 0;
sal_Int32 nCurrWidth;
while( nPosVecIndex < nPosVecSize )
{
nNextPos = maPosVec[ nPosVecIndex++ ];
nScript = maScriptVec[ nScriptVecIndex++ ];
SetOutDevFont( nScript );
nCurrWidth = mrOutDevice.GetTextWidth( maText, nThisPos, nNextPos - nThisPos );
maWidthVec.push_back( nCurrWidth );
maTextSize.AdjustWidth(nCurrWidth );
nThisPos = nNextPos;
}
}
// calculate maximum font height
SetOutDevFont( i18n::ScriptType::LATIN );
maTextSize.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) );
SetOutDevFont( i18n::ScriptType::ASIAN );
maTextSize.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) );
SetOutDevFont( i18n::ScriptType::COMPLEX );
maTextSize.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) );
mrOutDevice.Pop();
}
void SvtScriptedTextHelper_Impl::CalculateBreaks( const uno::Reference< i18n::XBreakIterator >& _xBreakIter )
{
maPosVec.clear();
maScriptVec.clear();
DBG_ASSERT( _xBreakIter.is(), "SvtScriptedTextHelper_Impl::CalculateBreaks - no break iterator" );
sal_Int32 nLen = maText.getLength();
if( nLen )
{
if( _xBreakIter.is() )
{
sal_Int32 nThisPos = 0; // first position of this portion
sal_Int32 nNextPos = 0; // first position of next portion
sal_Int16 nPortScript; // script type of this portion
do
{
nPortScript = _xBreakIter->getScriptType( maText, nThisPos );
nNextPos = _xBreakIter->endOfScript( maText, nThisPos, nPortScript );
switch( nPortScript )
{
case i18n::ScriptType::LATIN:
case i18n::ScriptType::ASIAN:
case i18n::ScriptType::COMPLEX:
maPosVec.push_back( nThisPos );
maScriptVec.push_back( nPortScript );
break;
default:
{
/* *** handling of weak characters ***
- first portion is weak: Use OutputDevice::HasGlyphs() to find the correct font
- weak portion follows another portion: Script type of preceding portion is used */
if( maPosVec.empty() )
{
sal_Int32 nCharIx = 0;
sal_Int32 nNextCharIx = 0;
sal_Int16 nScript;
do
{
nScript = i18n::ScriptType::LATIN;
while( (nScript != i18n::ScriptType::WEAK) && (nCharIx == nNextCharIx) )
{
nNextCharIx = mrOutDevice.HasGlyphs( GetFont( nScript ), maText, nCharIx, nNextPos - nCharIx );
if( nCharIx == nNextCharIx )
++nScript;
}
if( nNextCharIx == nCharIx )
++nNextCharIx;
maPosVec.push_back( nCharIx );
maScriptVec.push_back( nScript );
nCharIx = nNextCharIx;
}
while( nCharIx < nNextPos && nCharIx != -1 );
}
// nothing to do for following portions
}
}
nThisPos = nNextPos;
}
while( (0 <= nThisPos) && (nThisPos < nLen) );
}
else // no break iterator: whole text LATIN
{
maPosVec.push_back( 0 );
maScriptVec.push_back( i18n::ScriptType::LATIN );
}
// push end position of last portion
if( !maPosVec.empty() )
maPosVec.push_back( nLen );
}
CalculateSizes();
}
void SvtScriptedTextHelper_Impl::SetFonts( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _pCmplxFont )
{
maLatinFont = _pLatinFont ? *_pLatinFont : maDefltFont;
maAsianFont = _pAsianFont ? *_pAsianFont : maDefltFont;
maCmplxFont = _pCmplxFont ? *_pCmplxFont : maDefltFont;
CalculateSizes();
}
void SvtScriptedTextHelper_Impl::SetText( const OUString& _rText, const uno::Reference< i18n::XBreakIterator >& _xBreakIter )
{
maText = _rText;
CalculateBreaks( _xBreakIter );
}
void SvtScriptedTextHelper_Impl::DrawText( const Point& _rPos )
{
if( maText.isEmpty() || maPosVec.empty() )
return;
DBG_ASSERT( maPosVec.size() - 1 == maScriptVec.size(), "SvtScriptedTextHelper_Impl::DrawText - invalid std::vectors" );
DBG_ASSERT( maScriptVec.size() == maWidthVec.size(), "SvtScriptedTextHelper_Impl::DrawText - invalid std::vectors" );
mrOutDevice.Push(vcl::PushFlags::FONT | vcl::PushFlags::TEXTCOLOR);
Point aCurrPos( _rPos );
sal_Int32 nThisPos = maPosVec[ 0 ];
sal_Int32 nNextPos;
sal_Int32 nPosVecSize = maPosVec.size();
sal_Int32 nPosVecIndex = 1;
sal_Int16 nScript;
sal_Int32 nVecIndex = 0;
while( nPosVecIndex < nPosVecSize )
{
nNextPos = maPosVec[ nPosVecIndex++ ];
nScript = maScriptVec[ nVecIndex ];
vcl::Font aFont = GetFont( nScript );
mrOutDevice.SetFont( aFont );
if (aFont.GetColor() == COL_AUTO)
mrOutDevice.SetTextColor( mrOutDevice.GetFillColor().IsDark() ? COL_WHITE : COL_BLACK);
mrOutDevice.DrawText( aCurrPos, maText, nThisPos, nNextPos - nThisPos );
aCurrPos.AdjustX(maWidthVec[ nVecIndex++ ] );
aCurrPos.AdjustX(mrOutDevice.GetTextHeight() / 5 ); // add 20% of font height as portion spacing
nThisPos = nNextPos;
}
mrOutDevice.Pop();
}
SvtScriptedTextHelper::SvtScriptedTextHelper( OutputDevice& _rOutDevice ) :
mpImpl( new SvtScriptedTextHelper_Impl( _rOutDevice ) )
{
}
SvtScriptedTextHelper::SvtScriptedTextHelper( const SvtScriptedTextHelper& _rCopy ) :
mpImpl( new SvtScriptedTextHelper_Impl( *_rCopy.mpImpl ) )
{
}
SvtScriptedTextHelper::~SvtScriptedTextHelper()
{
}
void SvtScriptedTextHelper::SetFonts( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _pCmplxFont )
{
mpImpl->SetFonts( _pLatinFont, _pAsianFont, _pCmplxFont );
}
void SvtScriptedTextHelper::SetDefaultFont()
{
mpImpl->SetFonts( nullptr, nullptr, nullptr );
}
void SvtScriptedTextHelper::SetText( const OUString& _rText, const uno::Reference< i18n::XBreakIterator >& _xBreakIter )
{
mpImpl->SetText( _rText, _xBreakIter );
}
const Size& SvtScriptedTextHelper::GetTextSize() const
{
return mpImpl->GetTextSize();
}
void SvtScriptedTextHelper::DrawText( const Point& _rPos )
{
mpImpl->DrawText( _rPos );
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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