129 lines
2.9 KiB
C++
129 lines
2.9 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2022 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "undostack.h"
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#include <QCoreApplication>
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namespace olive {
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const int UndoStack::kMaxUndoCommands = 200;
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UndoStack::UndoStack()
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{
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undo_action_ = new QAction();
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connect(undo_action_, &QAction::triggered, this, &UndoStack::undo);
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redo_action_ = new QAction();
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connect(redo_action_, &QAction::triggered, this, &UndoStack::redo);
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UpdateActions();
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}
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UndoStack::~UndoStack()
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{
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clear();
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delete undo_action_;
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delete redo_action_;
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}
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void UndoStack::pushIfHasChildren(MultiUndoCommand *command)
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{
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if (command->child_count() > 0) {
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push(command);
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} else {
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delete command;
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}
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}
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void UndoStack::push(UndoCommand *command)
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{
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command->redo_and_set_modified();
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commands_.push_back(command);
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if (commands_.size() > kMaxUndoCommands) {
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delete commands_.front();
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commands_.pop_front();
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}
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if (CanRedo()) {
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for (auto it=undone_commands_.cbegin(); it!=undone_commands_.cend(); it++) {
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delete (*it);
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}
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undone_commands_.clear();
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}
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UpdateActions();
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}
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void UndoStack::undo()
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{
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if (CanUndo()) {
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// Undo most recently done command
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commands_.back()->undo_and_set_modified();
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// Place at the front of the "undone commands" list
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undone_commands_.push_front(commands_.back());
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// Remove undone command from the commands list
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commands_.pop_back();
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// Update actions
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UpdateActions();
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}
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}
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void UndoStack::redo()
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{
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if (CanRedo()) {
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// Redo most recently undone command
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undone_commands_.front()->redo_and_set_modified();
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// Place at the back of the done commands list
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commands_.push_back(undone_commands_.front());
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// Remove done command from undone list
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undone_commands_.pop_front();
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// Update actions
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UpdateActions();
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}
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}
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void UndoStack::clear()
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{
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for (auto it=commands_.cbegin(); it!=commands_.cend(); it++) {
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delete (*it);
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}
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commands_.clear();
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}
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void UndoStack::UpdateActions()
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{
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undo_action_->setEnabled(CanUndo());
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redo_action_->setEnabled(CanRedo());
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undo_action_->setText(QCoreApplication::translate("UndoStack", "Undo %1").arg(CanUndo() ? commands_.back()->name() : QString()));
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redo_action_->setText(QCoreApplication::translate("UndoStack", "Redo %1").arg(CanRedo() ? undone_commands_.front()->name() : QString()));
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}
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}
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