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 #include "ControlCommandBuffer.h"
  16 #include "bufferview_funcs.h"
  17 #include "debug.h"
  18 #include "lyxfunc.h"
  19 #include "LyXAction.h"
  20 #include "frontends/LyXView.h"
  21 #include "support/lyxalgo.h"
  22 #include "support/lstrings.h"
  23
  24 using std::vector;
  25 using std::back_inserter;
  26 using std::transform;
  27 using std::endl;
  28 using namespace bv_funcs;
  29
  30 namespace {
  31
  32 struct prefix_p {
  33         string p;
  34         prefix_p(string const & s)
  35                 : p(s) {}
  36         bool operator()(string const & s) const {
  37                 return prefixIs(s, p);
  38         }
  39 };
  40
  41 } // end of anon namespace
  42
  43
  44 ControlCommandBuffer::ControlCommandBuffer(LyXView & lv)
  45         : lv_(lv), history_pos_(history_.end())
  46 {
  47         transform(lyxaction.func_begin(), lyxaction.func_end(),
  48                 back_inserter(commands_), lyx::firster());
  49 }
  50
  51
  52 string const ControlCommandBuffer::historyUp()
  53 {
  54         if (history_pos_ == history_.begin())
  55                 return string();
  56
  57         return *(--history_pos_);
  58 }
  59
  60
  61 string const ControlCommandBuffer::historyDown()
  62 {
  63         if (history_pos_ == history_.end())
  64                 return "";
  65         if (history_pos_ + 1 == history_.end())
  66                 return "";
  67
  68         return *(++history_pos_);
  69 }
  70
  71
  72 string const ControlCommandBuffer::getCurrentState() const
  73 {
  74         return currentState(lv_.view().get());
  75 }
  76
  77
  78 vector<string> const
  79 ControlCommandBuffer::completions(string const & prefix, string & new_prefix)
  80 {
  81         vector<string> comp;
  82
  83         lyx::copy_if(commands_.begin(), commands_.end(),
  84                 back_inserter(comp), prefix_p(prefix));
  85
  86         if (comp.empty()) {
  87                 new_prefix = prefix;
  88                 return comp;
  89         }
  90
  91         if (comp.size() == 1) {
  92                 new_prefix = comp[0];
  93                 return vector<string>();
  94         }
  95
  96         // find maximal avaliable prefix
  97         string const tmp = comp[0];
  98         string test(prefix);
  99         if (tmp.length() > test.length())
 100                 test += tmp[test.length()];
 101         while (test.length() < tmp.length()) {
 102                 vector<string> vtmp;
 103                 lyx::copy_if(comp.begin(), comp.end(),
 104                         back_inserter(vtmp), prefix_p(test));
 105                 if (vtmp.size() != comp.size()) {
 106                         test.erase(test.length() - 1);
 107                         break;
 108                 }
 109                 test += tmp[test.length()];
 110         }
 111
 112         new_prefix = test;
 113         return comp;
 114 }
 115
 116
 117 void ControlCommandBuffer::dispatch(string const & str)
 118 {
 119         if (str.empty())
 120                 return;
 121
 122         history_.push_back(str);
 123         history_pos_ = history_.end();
 124         lv_.getLyXFunc().dispatch(str, true);
 125 }