52 lines
966 B
Java
Executable File
52 lines
966 B
Java
Executable File
package mindustry.editor;
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import arc.struct.Seq;
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public class OperationStack{
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private static final int maxSize = 10;
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private Seq<DrawOperation> stack = new Seq<>();
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private int index = 0;
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public OperationStack(){
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}
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public void clear(){
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stack.clear();
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index = 0;
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}
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public void add(DrawOperation action){
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stack.truncate(stack.size + index);
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index = 0;
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stack.add(action);
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if(stack.size > maxSize){
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stack.remove(0);
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}
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}
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public boolean canUndo(){
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return !(stack.size - 1 + index < 0);
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}
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public boolean canRedo(){
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return !(index > -1 || stack.size + index < 0);
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}
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public void undo(){
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if(!canUndo()) return;
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stack.get(stack.size - 1 + index).undo();
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index--;
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}
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public void redo(){
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if(!canRedo()) return;
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index++;
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stack.get(stack.size - 1 + index).redo();
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}
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}
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