vcl/unx/gtk3/a11y/atkimage.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21
  22 #include <string_view>
  23
  24 #include "atkwrapper.hxx"
  25
  26 #include <com/sun/star/accessibility/XAccessibleImage.hpp>
  27
  28 using namespace ::com::sun::star;
  29
  30 // FIXME
  31 static const gchar *
  32 getAsConst( std::u16string_view rString )
  33 {
  34     static const int nMax = 10;
  35     static OString aUgly[nMax];
  36     static int nIdx = 0;
  37     nIdx = (nIdx + 1) % nMax;
  38     aUgly[nIdx] = OUStringToOString( rString, RTL_TEXTENCODING_UTF8 );
  39     return aUgly[ nIdx ].getStr();
  40 }
  41
  42 /// @throws uno::RuntimeException
  43 static css::uno::Reference<css::accessibility::XAccessibleImage>
  44     getImage( AtkImage *pImage )
  45 {
  46     AtkObjectWrapper *pWrap = ATK_OBJECT_WRAPPER( pImage );
  47     if( pWrap )
  48     {
  49         if( !pWrap->mpImage.is() )
  50         {
  51             pWrap->mpImage.set(pWrap->mpContext, css::uno::UNO_QUERY);
  52         }
  53
  54         return pWrap->mpImage;
  55     }
  56
  57     return css::uno::Reference<css::accessibility::XAccessibleImage>();
  58 }
  59
  60 extern "C" {
  61
  62 static const gchar *
  63 image_get_image_description( AtkImage *image )
  64 {
  65     try {
  66         css::uno::Reference<css::accessibility::XAccessibleImage> pImage
  67             = getImage( image );
  68         if( pImage.is() )
  69             return getAsConst( pImage->getAccessibleImageDescription() );
  70     }
  71     catch(const uno::Exception&) {
  72         g_warning( "Exception in getAccessibleImageDescription()" );
  73     }
  74
  75     return nullptr;
  76 }
  77
  78 static void
  79 image_get_image_position( AtkImage     *image,
  80                           gint         *x,
  81                           gint         *y,
  82                           AtkCoordType  coord_type )
  83 {
  84     *x = *y = -1;
  85     if( ATK_IS_COMPONENT( image ) )
  86     {
  87         gint nWidth = -1;
  88         gint nHeight = -1;
  89         atk_component_get_extents(ATK_COMPONENT(image), x, y, &nWidth, &nHeight, coord_type);
  90     }
  91     else
  92         g_warning( "FIXME: no image position information" );
  93 }
  94
  95 static void
  96 image_get_image_size( AtkImage *image,
  97                       gint     *width,
  98                       gint     *height )
  99 {
 100     *width = *height = -1;
 101     try {
 102         css::uno::Reference<css::accessibility::XAccessibleImage> pImage
 103             = getImage( image );
 104         if( pImage.is() )
 105         {
 106             *width = pImage->getAccessibleImageWidth();
 107             *height = pImage->getAccessibleImageHeight();
 108         }
 109     }
 110     catch(const uno::Exception&) {
 111         g_warning( "Exception in getAccessibleImageHeight() or Width" );
 112     }
 113 }
 114
 115 static gboolean
 116 image_set_image_description( AtkImage *, const gchar * )
 117 {
 118     g_warning ("FIXME: no set image description");
 119     return FALSE;
 120 }
 121
 122 } // extern "C"
 123
 124 void
 125 imageIfaceInit (gpointer iface_, gpointer)
 126 {
 127   auto const iface = static_cast<AtkImageIface *>(iface_);
 128   g_return_if_fail (iface != nullptr);
 129
 130   iface->set_image_description = image_set_image_description;
 131   iface->get_image_description = image_get_image_description;
 132   iface->get_image_position = image_get_image_position;
 133   iface->get_image_size = image_get_image_size;
 134 }
 135
 136 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */