[synfig.git] /

/* === S Y N F I G ========================================================= */
/*!     \file layerencapsulate.cpp
**      \brief Template File
**
**      $Id$
**
**      \legal
**      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**      Copyright (c) 2007, 2008 Chris Moore
**
**      This package 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 2 of
**      the License, or (at your option) any later version.
**
**      This package 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.
**      \endlegal
*/
/* ========================================================================= */

/* === H E A D E R S ======================================================= */

#ifdef USING_PCH
#       include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#       include <config.h>
#endif

#include "layerencapsulate.h"
#include "layeradd.h"
#include "layerremove.h"
#include <synfigapp/canvasinterface.h>

#include <synfigapp/general.h>

#endif

using namespace std;
using namespace etl;
using namespace synfig;
using namespace synfigapp;
using namespace Action;

/* === M A C R O S ========================================================= */

ACTION_INIT_NO_GET_LOCAL_NAME(Action::LayerEncapsulate);
ACTION_SET_NAME(Action::LayerEncapsulate,"layer_encapsulate");
ACTION_SET_LOCAL_NAME(Action::LayerEncapsulate,N_("Encapsulate"));
ACTION_SET_TASK(Action::LayerEncapsulate,"encapsulate");
ACTION_SET_CATEGORY(Action::LayerEncapsulate,Action::CATEGORY_LAYER);
ACTION_SET_PRIORITY(Action::LayerEncapsulate,0);
ACTION_SET_VERSION(Action::LayerEncapsulate,"0.0");
ACTION_SET_CVS_ID(Action::LayerEncapsulate,"$Id$");

/* === G L O B A L S ======================================================= */

/* === P R O C E D U R E S ================================================= */

/* === M E T H O D S ======================================================= */

Action::LayerEncapsulate::LayerEncapsulate()
{
}

synfig::String
Action::LayerEncapsulate::get_local_name()const
{
        return get_layer_descriptions(layers, _("Encapsulate Layer"), _("Encapsulate Layers"));
}

Action::ParamVocab
Action::LayerEncapsulate::get_param_vocab()
{
        ParamVocab ret(Action::CanvasSpecific::get_param_vocab());

        ret.push_back(ParamDesc("layer",Param::TYPE_LAYER)
                .set_local_name(_("Layer"))
                .set_desc(_("Layer to be encapsulated"))
                .set_supports_multiple()
        );

        return ret;
}

bool
Action::LayerEncapsulate::is_candidate(const ParamList &x)
{
        return candidate_check(get_param_vocab(),x);
}

bool
Action::LayerEncapsulate::set_param(const synfig::String& name, const Action::Param &param)
{
        if(name=="layer" && param.get_type()==Param::TYPE_LAYER)
        {
                layers.push_back(param.get_layer());

                return true;
        }

        return Action::CanvasSpecific::set_param(name,param);
}

bool
Action::LayerEncapsulate::is_ready()const
{
        if(layers.empty())
                return false;
        return Action::CanvasSpecific::is_ready();
}

int
Action::LayerEncapsulate::lowest_depth()const
{
        std::list<synfig::Layer::Handle>::const_iterator iter;
        int lowest_depth(0x7fffffff);

        for(iter=layers.begin();iter!=layers.end();++iter)
        {
                int depth((*iter)->get_depth());
                if(depth<lowest_depth)
                        lowest_depth=depth;
        }
        if(lowest_depth==0x7fffffff)
                return 0;
        return lowest_depth;
}

void
Action::LayerEncapsulate::prepare()
{

        if(!first_time())
                return;

        if(layers.empty())
                throw Error(_("No layers to encapsulate"));

        // First create the new canvas and layer
        if(!child_canvas)
                child_canvas=Canvas::create_inline(get_canvas());

        Layer::Handle new_layer(Layer::create("PasteCanvas"));

        new_layer->set_param("canvas",child_canvas);

        int target_depth(lowest_depth());

        // Add the layer
        {
                Action::Handle action(LayerAdd::create());

                action->set_param("canvas",get_canvas());
                action->set_param("canvas_interface",get_canvas_interface());
                action->set_param("new",new_layer);

                add_action(action);
        }

        // Move the layer
        {
                Action::Handle action(Action::create("layer_move"));

                assert(action);

                action->set_param("canvas",get_canvas());
                action->set_param("canvas_interface",get_canvas_interface());
                action->set_param("layer",new_layer);
                action->set_param("new_index",target_depth);

                add_action(action);
        }

        std::list<synfig::Layer::Handle>::reverse_iterator iter;

        for(iter=layers.rbegin();iter!=layers.rend();++iter)
        {
                Layer::Handle layer(*iter);

                Canvas::Handle subcanvas(layer->get_canvas());

                // Find the iterator for the layer
                Canvas::iterator iter=find(subcanvas->begin(),subcanvas->end(),layer);

                // If we couldn't find the layer in the canvas, then bail
                if(*iter!=layer)
                        throw Error(_("This layer doesn't exist anymore."));

                if(!subcanvas)
                        throw Error(_("This layer doesn't have a parent canvas"));

                // If the subcanvas isn't the same as the canvas,
                // then it had better be an inline canvas. If not,
                // bail
                if(get_canvas()!=subcanvas && !subcanvas->is_inline())
                        throw Error(_("This layer doesn't belong to this canvas anymore"));

                if(get_canvas()!=subcanvas)
                        throw Error(_("get_canvas()!=subcanvas"));

                // Remove the layer from the old canvas
                {
                        Action::Handle action(LayerRemove::create());

                        action->set_param("canvas",subcanvas);
                        action->set_param("canvas_interface",get_canvas_interface());
                        action->set_param("layer",layer);

                        add_action(action);
                }
                // Add the layer to the new canvas
                {
                        Action::Handle action(LayerAdd::create());

                        action->set_param("canvas",child_canvas);
                        action->set_param("canvas_interface",get_canvas_interface());
                        action->set_param("new",layer);

                        add_action(action);
                }
        }
}