src/BackStack.h

   1 // -*- C++ -*-
   2 /* This file is part of
   3  * ======================================================
   4  *
   5  *           LyX, The Document Processor
   6  *
   7  *          Copyright (C) 1997-1999 The LyX Team.
   8  *
   9  * ======================================================*/
  10
  11 #ifndef BACK_STACK_H
  12 #define BACK_STACK_H
  13
  14 #include <stack>
  15 #include "LString.h"
  16
  17 // Created by Alejandro Aguilar Sierra, 970806
  18
  19 /**  Utility to get back from a reference or from a child document.
  20  */
  21 class BackStack {
  22 private:
  23         ///
  24         struct BackStackItem {
  25                 BackStackItem(string const & f, int xx, int yy)
  26                         : fname(f), x(xx), y(yy) {}
  27                 ///
  28                 //void set(string f, int xx, int yy) {
  29                 //      fname = f;  x = xx;  y = yy;
  30                 //}
  31                 /// Filename
  32                 string fname;
  33                 /// Cursor x-position
  34                 int x;
  35                 /// Cursor y-position
  36                 int y;
  37         };
  38 public:
  39         ///
  40         void push(string f, int x, int y) {
  41                 BackStackItem bit(f, x, y);
  42                 stakk.push(bit);
  43         }
  44         ///
  45         string pop(int * x, int * y) {
  46                 BackStackItem bit = stakk.top();
  47                 *x = bit.x;
  48                 *y = bit.y;
  49                 stakk.pop();
  50                 return bit.fname;
  51         }
  52         ///
  53         bool empty() const {
  54                 return stakk.empty();
  55         }
  56 private:
  57         ///
  58         stack<BackStackItem> stakk;
  59 };
  60
  61 #endif