Initial import

2008-12-02 12:01:29 +01:00
commit 05c35356ab
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+/***************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact:  Qt Software Information (qt-info@nokia.com)
+**
+** 
+** Non-Open Source Usage  
+** 
+** Licensees may use this file in accordance with the Qt Beta Version
+** License Agreement, Agreement version 2.2 provided with the Software or,
+** alternatively, in accordance with the terms contained in a written
+** agreement between you and Nokia.  
+** 
+** GNU General Public License Usage 
+** 
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the packaging
+** of this file.  Please review the following information to ensure GNU
+** General Public Licensing requirements will be met:
+**
+** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt GPL Exception version
+** 1.2, included in the file GPL_EXCEPTION.txt in this package.  
+** 
+***************************************************************************/
+#include "procommandmanager.h"
+
+using namespace Qt4ProjectManager::Internal;
+
+ProCommandGroup::ProCommandGroup(const QString &name)
+    : m_name(name) { }
+
+ProCommandGroup::~ProCommandGroup()
+{
+    qDeleteAll(m_commands);
+}
+
+void ProCommandGroup::appendCommand(ProCommand *cmd)
+{
+    m_commands.append(cmd);
+}
+
+void ProCommandGroup::undo()
+{
+    for(int i=m_commands.count(); i>0; --i) {
+        m_commands[i-1]->undo();
+    }
+}
+
+void ProCommandGroup::redo()
+{
+    for(int i=0; i<m_commands.count(); ++i) {
+        m_commands[i]->redo();
+    }
+}
+
+ProCommandManager::ProCommandManager(QObject *parent)
+    : QObject(parent)
+{
+    m_savepoint = 0;
+    m_pos = 0;
+    m_group = 0;
+}
+
+ProCommandManager::~ProCommandManager()
+{
+    qDeleteAll(m_groups);    
+}
+
+void ProCommandManager::beginGroup(const QString &name)
+{
+    Q_ASSERT(!m_group);
+
+    if (m_pos != m_groups.count()) {
+        int removecount = m_groups.count() - m_pos;
+        for(int i=0; i<removecount; ++i) {
+            delete m_groups.takeLast();
+        }
+        m_pos = m_groups.count();
+    }
+    
+    m_group = new ProCommandGroup(name);
+}
+
+bool ProCommandManager::hasGroup() const
+{
+    return (m_group != 0);
+}
+
+void ProCommandManager::endGroup()
+{
+    Q_ASSERT(m_group);
+
+    m_groups.append(m_group);
+    m_pos = m_groups.count();
+    m_group = 0;
+
+    emit modified();
+}
+
+bool ProCommandManager::command(ProCommand *cmd)
+{
+    Q_ASSERT(m_group);
+
+    if (cmd->redo()) {
+        m_group->appendCommand(cmd);
+        return true;
+    }
+
+    return false;
+}
+
+void ProCommandManager::undo()
+{
+    if (canUndo()) {
+        --m_pos;
+        m_groups[m_pos]->undo();
+    }
+
+    emit modified();
+}
+
+void ProCommandManager::redo()
+{
+    if (canRedo()) {
+        m_groups[m_pos]->redo();
+        ++m_pos;
+    }
+
+    emit modified();
+}
+
+bool ProCommandManager::isDirty() const
+{
+    if (m_groups.isEmpty())
+        return false;
+
+    if (m_pos != 0 && m_groups.at(m_pos - 1) == m_savepoint)
+        return false;
+
+    return true;
+}
+
+void ProCommandManager::notifySave()
+{
+    if (m_pos > 0)
+        m_savepoint = m_groups.at(m_pos - 1);
+}
+
+
+bool ProCommandManager::canUndo() const
+{
+    return (!m_groups.isEmpty() && m_pos > 0);
+}
+
+bool ProCommandManager::canRedo() const
+{
+    return (m_groups.count() > m_pos);
+}