libreoffice/editeng/source/accessibility/AccessibleStringWrap.cxx

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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 <algorithm>
#include <tools/debug.hxx>
#include <vcl/outdev.hxx>

#include <editeng/svxfont.hxx>
#include <editeng/AccessibleStringWrap.hxx>

//------------------------------------------------------------------------
//
// AccessibleStringWrap implementation
//
//------------------------------------------------------------------------

AccessibleStringWrap::AccessibleStringWrap( OutputDevice& rDev, SvxFont& rFont, const OUString& rText ) :
    mrDev( rDev ),
    mrFont( rFont ),
    maText( rText )
{
}

void AccessibleStringWrap::GetCharacterBounds( sal_Int32 nIndex, Rectangle& rRect )
{
    DBG_ASSERT(nIndex >= 0 && nIndex <= USHRT_MAX,
               "SvxAccessibleStringWrap::GetCharacterBounds: index value overflow");

    mrFont.SetPhysFont( &mrDev );

    // #108900# Handle virtual position one-past-the end of the string
    if( nIndex >= maText.getLength() )
    {
        // create a caret bounding rect that has the height of the
        // current font and is one pixel wide.
        rRect.Left() = mrDev.GetTextWidth(maText);
        rRect.Top() = 0;
        rRect.SetSize( Size(mrDev.GetTextHeight(), 1) );
    }
    else
    {
        sal_Int32 aXArray[2];
        mrDev.GetCaretPositions( maText, aXArray, static_cast< sal_uInt16 >(nIndex), 1 );
        rRect.Left() = 0;
        rRect.Top() = 0;
        rRect.SetSize( Size(mrDev.GetTextHeight(), labs(aXArray[0] - aXArray[1])) );
        rRect.Move( ::std::min(aXArray[0], aXArray[1]), 0 );
    }

    if( mrFont.IsVertical() )
    {
        // #101701# Rotate to vertical
        rRect = Rectangle( Point(-rRect.Top(), rRect.Left()),
                           Point(-rRect.Bottom(), rRect.Right()));
    }
}

sal_Int32 AccessibleStringWrap::GetIndexAtPoint( const Point& rPoint )
{
    // search for character bounding box containing given point
    Rectangle aRect;
    sal_Int32 i, nLen = maText.getLength();
    for( i=0; i<nLen; ++i )
    {
        GetCharacterBounds(i, aRect);
        if( aRect.IsInside(rPoint) )
            return i;
    }

    return -1;
}

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