36 lines
762 B
C++
36 lines
762 B
C++
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#include "undostack.hpp"
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void UndoStack::undo() {
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if(stack_position >= 0) {
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command_stack[stack_position]->undo();
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stack_position--;
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}
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}
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void UndoStack::redo() {
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if((stack_position + 1) < command_stack.size()) {
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stack_position++;
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command_stack[stack_position]->execute();
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}
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}
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Command* UndoStack::get_last_command() {
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if(command_stack.empty())
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return nullptr;
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if(stack_position >= 0)
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return command_stack[stack_position].get();
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return nullptr;
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}
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Command* UndoStack::get_next_command() {
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if(command_stack.empty())
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return nullptr;
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if((stack_position + 1) < command_stack.size())
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return command_stack[stack_position + 1].get();
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return nullptr;
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}
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