Gary Talent
587dd92414
git-subtree-dir: deps/nostalgia git-subtree-split: 9cb6bd4a32e9f39a858f72443ff5c6d40489fe22
45 lines
952 B
C++
45 lines
952 B
C++
/*
|
|
* Copyright 2016 - 2023 Gary Talent (gary@drinkingtea.net). All rights reserved.
|
|
*/
|
|
|
|
#include <studio/undostack.hpp>
|
|
|
|
namespace studio {
|
|
|
|
bool UndoCommand::mergeWith(UndoCommand const*) noexcept {
|
|
return false;
|
|
}
|
|
|
|
void UndoStack::push(ox::UPtr<UndoCommand> &&cmd) noexcept {
|
|
for (auto const i = m_stackIdx; i < m_stack.size();) {
|
|
oxIgnoreError(m_stack.erase(i));
|
|
}
|
|
cmd->redo();
|
|
redoTriggered.emit(cmd.get());
|
|
changeTriggered.emit(cmd.get());
|
|
if (m_stack.empty() || !(*m_stack.back().value)->mergeWith(cmd.get())) {
|
|
m_stack.emplace_back(std::move(cmd));
|
|
++m_stackIdx;
|
|
}
|
|
}
|
|
|
|
void UndoStack::redo() noexcept {
|
|
if (m_stackIdx < m_stack.size()) {
|
|
auto &c = m_stack[m_stackIdx++];
|
|
c->redo();
|
|
redoTriggered.emit(c.get());
|
|
changeTriggered.emit(c.get());
|
|
}
|
|
}
|
|
|
|
void UndoStack::undo() noexcept {
|
|
if (m_stackIdx) {
|
|
auto &c = m_stack[--m_stackIdx];
|
|
c->undo();
|
|
undoTriggered.emit(c.get());
|
|
changeTriggered.emit(c.get());
|
|
}
|
|
}
|
|
|
|
}
|