sym_diff_canvas_context.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/gpl-3.0.html
 */
 
#include <diff_merge/sym_diff_canvas_context.h>
#include <diff_merge/sch_diff_canvas_context.h>
#include <diff_merge/sym_item_diff.h>
#include <diff_merge/diff_scene.h>
 
#include <gal/painter.h>
#include <kiid.h>
#include <lib_symbol.h>
#include <sch_item.h>
#include <sch_view.h>
#include <widgets/widget_diff_canvas.h>
 
#include <map>
 
 
namespace KICAD_DIFF
{
 
void ConfigureSymDiffCanvasContext( WIDGET_DIFF_CANVAS& aCanvas, LIB_SYMBOL* aBefore, LIB_SYMBOL* aAfter )
{
    if( !aBefore && !aAfter )
    {
        aCanvas.SetContextItems( {} );
        return;
    }
 
    const DIFF_COLOR_THEME theme;
 
    auto colorFor = [&]( CHANGE_KIND aKind ) -> KIGFX::COLOR4D
    {
        switch( aKind )
        {
        case CHANGE_KIND::ADDED: return theme.added;
        case CHANGE_KIND::REMOVED: return theme.removed;
        default: return theme.modified;
        }
    };
 
    std::vector<SYM_ELEMENT>       elements = DiffSymbolElements( aBefore, aAfter );
    std::map<KIID, KIGFX::COLOR4D> overrides;
 
    for( const SYM_ELEMENT& element : elements )
    {
        overrides[element.item->m_Uuid] = colorFor( element.kind );
        const_cast<EDA_ITEM*>( element.item )->SetBrightened();
    }
 
    std::vector<KIGFX::VIEW_ITEM*> items;
 
    if( aAfter )
    {
        for( SCH_ITEM& item : aAfter->GetDrawItems() )
            items.push_back( &item );
    }
 
    for( const SYM_ELEMENT& element : elements )
    {
        if( element.kind == CHANGE_KIND::REMOVED )
            items.push_back( const_cast<EDA_ITEM*>( element.item ) );
    }
 
    aCanvas.SetWorldUnitLength( SCH_WORLD_UNIT );
    aCanvas.SetContextPainter( MakeSchDiffContextPainter( aCanvas.GetGAL(), nullptr, theme.reference, overrides ) );
    aCanvas.SetContextItems( items );
    aCanvas.ZoomToFit();
}
 
} // namespace KICAD_DIFF