/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 *************************************************************/



#include "oox/vml/vmltextboxcontext.hxx"

namespace oox {
namespace vml {

// ============================================================================

using ::oox::core::ContextHandler2;
using ::oox::core::ContextHandler2Helper;
using ::oox::core::ContextHandlerRef;
using ::rtl::OUString;

// ============================================================================

TextPortionContext::TextPortionContext( ContextHandler2Helper& rParent,
        TextBox& rTextBox, const TextFontModel& rParentFont,
        sal_Int32 nElement, const AttributeList& rAttribs ) :
    ContextHandler2( rParent ),
    mrTextBox( rTextBox ),
    maFont( rParentFont ),
    mnInitialPortions( rTextBox.getPortionCount() )
{
    switch( nElement )
    {
        case XML_font:
            maFont.moName = rAttribs.getXString( XML_face );
            maFont.moColor = rAttribs.getXString( XML_color );
            maFont.monSize = rAttribs.getInteger( XML_size );
        break;
        case XML_u:
            OSL_ENSURE( !maFont.monUnderline, "TextPortionContext::TextPortionContext - nested <u> elements" );
            maFont.monUnderline = (rAttribs.getToken( XML_class, XML_TOKEN_INVALID ) == XML_font4) ? XML_double : XML_single;
        break;
        case XML_sub:
        case XML_sup:
            OSL_ENSURE( !maFont.monEscapement, "TextPortionContext::TextPortionContext - nested <sub> or <sup> elements" );
            maFont.monEscapement = nElement;
        break;
        case XML_b:
            OSL_ENSURE( !maFont.mobBold, "TextPortionContext::TextPortionContext - nested <b> elements" );
            maFont.mobBold = true;
        break;
        case XML_i:
            OSL_ENSURE( !maFont.mobItalic, "TextPortionContext::TextPortionContext - nested <i> elements" );
            maFont.mobItalic = true;
        break;
        case XML_s:
            OSL_ENSURE( !maFont.mobStrikeout, "TextPortionContext::TextPortionContext - nested <s> elements" );
            maFont.mobStrikeout = true;
        break;
        case XML_span:
        break;
        default:
            OSL_ENSURE( false, "TextPortionContext::TextPortionContext - unknown element" );
    }
}

ContextHandlerRef TextPortionContext::onCreateContext( sal_Int32 nElement, const AttributeList& rAttribs )
{
    OSL_ENSURE( nElement != XML_font, "TextPortionContext::onCreateContext - nested <font> elements" );
    return new TextPortionContext( *this, mrTextBox, maFont, nElement, rAttribs );
}

void TextPortionContext::onCharacters( const OUString& rChars )
{
    switch( getCurrentElement() )
    {
        case XML_span:
            // replace all NBSP characters with SP
            mrTextBox.appendPortion( maFont, rChars.replace( 0xA0, ' ' ) );
        break;
        default:
            mrTextBox.appendPortion( maFont, rChars );
    }
}

void TextPortionContext::onEndElement()
{
    /*  A child element without own child elements may contain a single space
        character, for example:

          <div>
            <font><i>abc</i></font>
            <font> </font>
            <font><b>def</b></font>
          </div>

        represents the italic text 'abc', an unformatted space character, and
        the bold text 'def'. Unfortunately, the XML parser skips the space
        character without issuing a 'characters' event. The class member
        'mnInitialPortions' contains the number of text portions existing when
        this context has been constructed. If no text has been added in the
        meantime, the space character has to be added manually.
     */
    if( mrTextBox.getPortionCount() == mnInitialPortions )
        mrTextBox.appendPortion( maFont, OUString( sal_Unicode( ' ' ) ) );
}

// ============================================================================

TextBoxContext::TextBoxContext( ContextHandler2Helper& rParent, TextBox& rTextBox, const AttributeList& /*rAttribs*/ ) :
    ContextHandler2( rParent ),
    mrTextBox( rTextBox )
{
}

ContextHandlerRef TextBoxContext::onCreateContext( sal_Int32 nElement, const AttributeList& rAttribs )
{
    switch( getCurrentElement() )
    {
        case VML_TOKEN( textbox ):
            if( nElement == XML_div ) return this;
        break;
        case XML_div:
            if( nElement == XML_font ) return new TextPortionContext( *this, mrTextBox, TextFontModel(), nElement, rAttribs );
        break;
    }
    return 0;
}

// ============================================================================

} // namespace vml
} // namespace oox