GEModifierStack.cpp

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/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  

Doom 3 Source Code 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.

Doom 3 Source Code 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 Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#include "../../idlib/precompiled.h"
#pragma hdrstop

#include "GEApp.h"      
#include "GEModifierStack.h"

rvGEModifierStack::rvGEModifierStack ( )
{
        mCurrentModifier = -1;
}

rvGEModifierStack::~rvGEModifierStack ( )
{
        Reset ( );
}

void rvGEModifierStack::Reset ( void )
{
        int i;
        
        for ( i = 0; i < mModifiers.Num ( ); i ++ )
        {
                delete mModifiers[i];
        }
        
        mModifiers.Clear ( );
}

bool rvGEModifierStack::Append ( rvGEModifier* modifier )
{
        // TODO: Add the modifier and clear all redo modifiers
        if ( !modifier->IsValid ( ) )
        {
                delete modifier;
                return false;
        }

        while ( mCurrentModifier < mModifiers.Num ( ) - 1 )
        {
                delete mModifiers[mModifiers.Num()-1];
                mModifiers.RemoveIndex ( mModifiers.Num()-1 );
        }
        
        if ( !mMergeBlock && mModifiers.Num ( ) )
        {
                rvGEModifier* top = mModifiers[mModifiers.Num()-1];
                
                // See if the two modifiers can merge
                if ( top->GetWindow() == modifier->GetWindow() &&
                         !idStr::Icmp ( top->GetName ( ), modifier->GetName ( ) ) &&
                         top->CanMerge ( modifier ) )
                {
                        // Merge the two modifiers
                        if ( top->Merge ( modifier ) )
                        {
                                top->Apply ( );
                                
                                gApp.GetProperties().Update ( );
                                gApp.GetTransformer().Update ( );
                        
                                delete modifier;
                                return true;
                        }               
                }
        }
        
        mModifiers.Append ( modifier );
        mCurrentModifier = mModifiers.Num ( ) - 1;
        
        modifier->Apply ( );
        
        mMergeBlock = false;

        gApp.GetProperties().Update ( );
        gApp.GetTransformer().Update ( );

        return true;
}

bool rvGEModifierStack::Undo ( void )
{
        if ( mCurrentModifier < 0 )
        {
                return false;
        }
        
        mModifiers[mCurrentModifier]->Undo ( );
        mCurrentModifier--;

        gApp.GetProperties().Update ( );
        gApp.GetTransformer().Update ( );

        return true;
}

bool rvGEModifierStack::Redo ( void )
{
        if ( mCurrentModifier + 1 < mModifiers.Num ( ) )
        {
                mCurrentModifier++;
                mModifiers[mCurrentModifier]->Apply ( );
        }

        gApp.GetProperties().Update ( );
        gApp.GetTransformer().Update ( );

        return true;
}