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/*    */ package NET.worlds.scape;
/*    */ 
/*    */ import NET.worlds.console.Console;
/*    */ 
/*    */ 
/*    */ 
/*    */ 
/*    */ 
/*    */ 
/*    */ 
/*    */ 
/*    */ 
/*    */ 
/*    */ 
/*    */ 
/*    */ class UndoStack
/*    */ {
/* 18 */   private Undoable[] stack = new Undoable[100];
/*    */   
/*    */ 
/*    */   private int stackPtr;
/*    */   
/*    */ 
/*    */ 
/*    */   Undoable peek()
/*    */   {
/* 27 */     return this.stackPtr - 1 >= 0 ? this.stack[(this.stackPtr - 1)] : 
/* 28 */       this.stack[(this.stack.length - 1)];
/*    */   }
/*    */   
/*    */   void push(Undoable undo)
/*    */   {
/*    */     for (;;) {
/*    */       try {
/* 35 */         this.stack[(this.stackPtr++)] = undo;
/* 36 */         return;
/*    */       } catch (IndexOutOfBoundsException e) {
/* 38 */         this.stackPtr = 0;
/*    */       }
/*    */     }
/*    */   }
/*    */   
/*    */   boolean undo()
/*    */   {
/*    */     for (;;) {
/*    */       try {
/* 47 */         Undoable u = this.stack[(--this.stackPtr)];
/* 48 */         if (u != null) {
/* 49 */           u.undo();
/* 50 */           this.stack[this.stackPtr] = null;
/* 51 */           return true;
/*    */         }
/* 53 */         Console.println(Console.message("No-undo"));
/* 54 */         return false;
/*    */       } catch (IndexOutOfBoundsException e) {
/* 56 */         this.stackPtr = this.stack.length;
/*    */       }
/*    */     }
/*    */   }
/*    */ }


/* Location:              C:\Program Files (x86)\Worlds Inc\WorldsPlayer - Win7\lib\worlds.jar!\NET\worlds\scape\UndoStack.class
 * Java compiler version: 6 (50.0)
 * JD-Core Version:       0.7.1
 */