Adding upstream version 4:24.2.0.upstream/4%24.2.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 318 insertions, 0 deletions

diff --git a/svtools/source/control/scriptedtext.cxx b/svtools/source/control/scriptedtext.cxx
new file mode 100644
index 0000000000..e47924687b
--- /dev/null
+++ b/svtools/source/control/scriptedtext.cxx
@@ -0,0 +1,318 @@
+/* -*- 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: */