src/history.cpp

/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2013 Santeri Piippo
 *
 *  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, see <http://www.gnu.org/licenses/>.
 */

#include "history.h"
#include "ldtypes.h"
#include "file.h"
#include "misc.h"
#include "gui.h"
#include "gldraw.h"

EXTERN_ACTION (undo)
EXTERN_ACTION (redo)

bool g_fullRefresh = false;

History::History() {
	setOpened (false);
	setPos (-1);
}

void History::undo() {
	if (m_changesets.size() == 0 || pos() == -1)
		return;
	
	const list& set = changeset (pos());
	g_fullRefresh = false;
	
	// Iterate the list in reverse and undo all actions
	for (const AbstractHistoryEntry * change : c_rev<AbstractHistoryEntry*> (set))
		change->undo();
	
	setPos (pos() - 1);
	
	if (!g_fullRefresh)
		g_win->refresh();
	else
		g_win->fullRefresh();
	
	updateActions();
}

void History::redo() {
	if (pos() == (long) m_changesets.size())
		return;
	
	const list& set = changeset (pos() + 1);
	g_fullRefresh = false;
	
	// Redo things - in the order as they were done in the first place
	for (const AbstractHistoryEntry * change : set)
		change->redo();
	
	setPos (pos() + 1);
	
	if (!g_fullRefresh)
		g_win->refresh();
	else
		g_win->fullRefresh();
	
	updateActions();
}

void History::clear() {
	for (vector<AbstractHistoryEntry*> set : m_changesets)
		for (AbstractHistoryEntry * change : set)
			delete change;
	
	m_changesets.clear();
}

void History::updateActions() const {
	ACTION (undo)->setEnabled (pos() != -1);
	ACTION (redo)->setEnabled (pos() < (long) m_changesets.size() - 1);
}

void History::open() {
	if (opened())
		return;
	
	setOpened (true);
}

void History::close() {
	if (!opened())
		return;
	
	setOpened (false);
	
	if (m_currentArchive.size() == 0)
		return;
	
	while (pos() < size() - 1)
		m_changesets.erase (size() - 1);
	
	m_changesets << m_currentArchive;
	m_currentArchive.clear();
	setPos (pos() + 1);
	updateActions();
}

void History::add (AbstractHistoryEntry* entry) {
	if (!opened()) {
		delete entry;
		return;
	}
	
	entry->setParent (this);
	m_currentArchive << entry;
}

// =============================================================================
void AddHistory::undo() const {
	LDOpenFile* f = parent()->file();
	LDObject* obj = f->object (index());
	f->forgetObject (obj);
	delete obj;
	
	g_fullRefresh = true;
}

void AddHistory::redo() const {
	LDOpenFile* f = parent()->file();
	LDObject* obj = parseLine (code());
	f->insertObj (index(), obj);
	g_win->R()->compileObject (obj);
}

AddHistory::~AddHistory() {}

// =============================================================================
// heh
void DelHistory::undo() const {
	LDOpenFile* f = parent()->file();
	LDObject* obj = parseLine (code());
	f->insertObj (index(), obj);
	g_win->R()->compileObject (obj);
}

void DelHistory::redo() const {
	LDOpenFile* f = parent()->file();
	LDObject* obj = f->object (index());
	f->forgetObject (obj);
	delete obj;
	
	g_fullRefresh = true;
}

DelHistory::~DelHistory() {}

// =============================================================================
void EditHistory::undo() const {
	LDObject* obj = g_curfile->object (index());
	LDObject* newobj = parseLine (oldCode());
	obj->replace (newobj);
	g_win->R()->compileObject (newobj);
}

void EditHistory::redo() const {
	LDObject* obj = g_curfile->object (index());
	LDObject* newobj = parseLine (newCode());
	obj->replace (newobj);
	g_win->R()->compileObject (newobj);
}

EditHistory::~EditHistory() {}

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

void SwapHistory::undo() const {
	LDObject::fromID (a)->swap (LDObject::fromID (b));
}

void SwapHistory::redo() const {
	undo(); // :v
}

SwapHistory::~SwapHistory() {}