src/frontends/controllers/ControlCommandBuffer.C

   1 /**
   2  * \file ControlCommandBuffer.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars
   7  * \author Asger and Juergen
   8  * \author John Levon
   9  *
  10  * Full author contact details are available in file CREDITS
  11  */
  12
  13 #include <config.h>
  14
  15
  16 #include "ControlCommandBuffer.h"
  17 #include "support/lyxalgo.h"
  18 #include "support/lstrings.h"
  19 #include "LyXAction.h"
  20 #include "lyxfunc.h"
  21 #include "debug.h"
  22
  23 using std::vector;
  24 using std::back_inserter;
  25 using std::transform;
  26 using std::endl;
  27
  28 namespace {
  29
  30 struct prefix_p {
  31         string p;
  32         prefix_p(string const & s)
  33                 : p(s) {}
  34         bool operator()(string const & s) const {
  35                 return prefixIs(s, p);
  36         }
  37 };
  38
  39 } // end of anon namespace
  40
  41
  42 ControlCommandBuffer::ControlCommandBuffer(LyXFunc & lf)
  43         : lyxfunc_(lf), history_pos_(history_.end())
  44 {
  45         transform(lyxaction.func_begin(), lyxaction.func_end(),
  46                 back_inserter(commands_), lyx::firster());
  47 }
  48
  49
  50 string const ControlCommandBuffer::historyUp()
  51 {
  52         if (history_pos_ == history_.begin())
  53                 return string();
  54
  55         return *(--history_pos_);
  56 }
  57
  58
  59 string const ControlCommandBuffer::historyDown()
  60 {
  61         if (history_pos_ == history_.end())
  62                 return "";
  63         if (history_pos_ + 1 == history_.end())
  64                 return "";
  65
  66         return *(++history_pos_);
  67 }
  68
  69
  70 vector<string> const
  71 ControlCommandBuffer::completions(string const & prefix, string & new_prefix)
  72 {
  73         vector<string> comp;
  74
  75         lyx::copy_if(commands_.begin(), commands_.end(),
  76                 back_inserter(comp), prefix_p(prefix));
  77
  78         if (comp.empty()) {
  79                 new_prefix = prefix;
  80                 return comp;
  81         }
  82
  83         if (comp.size() == 1) {
  84                 new_prefix = comp[0];
  85                 return vector<string>();
  86         }
  87
  88         // find maximal avaliable prefix
  89         string const tmp = comp[0];
  90         string test(prefix);
  91         if (tmp.length() > test.length())
  92                 test += tmp[test.length()];
  93         while (test.length() < tmp.length()) {
  94                 vector<string> vtmp;
  95                 lyx::copy_if(comp.begin(), comp.end(),
  96                         back_inserter(vtmp), prefix_p(test));
  97                 if (vtmp.size() != comp.size()) {
  98                         test.erase(test.length() - 1);
  99                         break;
 100                 }
 101                 test += tmp[test.length()];
 102         }
 103
 104         new_prefix = test;
 105         return comp;
 106 }
 107
 108
 109 void ControlCommandBuffer::dispatch(string const & str)
 110 {
 111         if (str.empty())
 112                 return;
 113
 114         history_.push_back(str);
 115         history_pos_ = history_.end();
 116         lyxfunc_.dispatch(str, true);
 117 }