selection_memento.cc

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/*
    Copyright (C) 2014 Paul Davis

    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 2 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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "ardour/lmath.h"
#include "selection_memento.h"
#include "editing.h"
#include "public_editor.h"

#include "i18n.h"

SelectionMemento::SelectionMemento ()
{
}

SelectionMemento::~SelectionMemento ()
{
}

XMLNode&
SelectionMemento::get_state () {

        XMLNode* node = new XMLNode ("SelectionMemento");
        char buf[32];
        PublicEditor& editor = PublicEditor::instance();

        node->add_property ("mouse-mode", enum2str(editor.current_mouse_mode()));
        snprintf (buf, sizeof(buf), "%" PRId64, editor.get_current_zoom());
        node->add_property ("zoom", buf);
        snprintf (buf, sizeof (buf), "%" PRIi64, editor.leftmost_sample());
        node->add_property ("left-frame", buf);
        snprintf (buf, sizeof (buf), "%f", editor.get_y_origin());
        node->add_property ("y-origin", buf);

        node->add_child_nocopy (editor.get_selection().get_state());
        return *node;
}

int
SelectionMemento::set_state (const XMLNode& node, int /*version*/) {

        const XMLProperty* prop;
        PublicEditor& editor = PublicEditor::instance();
        if (node.name() != X_("SelectionMemento")) {
                return -1;
        }

        if ((prop = node.property ("mouse-mode"))) {
                Editing::MouseMode m = Editing::str2mousemode(prop->value());
                editor.set_mouse_mode (m, true);
        }

        if ((prop = node.property ("zoom"))) {
                /* older versions of ardour used floating point samples_per_pixel */
                double f = PBD::atof (prop->value());
                editor.reset_zoom (llrintf (f));
        }

        if ((prop = node.property ("left-frame")) != 0) {
                framepos_t pos;
                if (sscanf (prop->value().c_str(), "%" PRId64, &pos) == 1) {
                        if (pos < 0) {
                                pos = 0;
                        }
                        editor.reset_x_origin (pos);
                }
        }

        if ((prop = node.property ("y-origin")) != 0) {
                editor.reset_y_origin (atof (prop->value ().c_str()));
        }

        XMLNodeList children = node.children ();
        for (XMLNodeList::const_iterator i = children.begin(); i != children.end(); ++i) {
                editor.get_selection().set_state (**i, Stateful::current_state_version);
        }

        return 0;
}