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 Jürgen
   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
  17 #include "BufferView.h"
  18 #include "cursor.h"
  19 #include "lyxfunc.h"
  20 #include "LyXAction.h"
  21 #include "funcrequest.h"
  22
  23 #include "frontends/LyXView.h"
  24
  25 #include "support/lyxalgo.h"
  26 #include "support/lstrings.h"
  27
  28 using std::back_inserter;
  29 using std::transform;
  30 using std::string;
  31 using std::vector;
  32
  33 namespace lyx {
  34
  35 using support::prefixIs;
  36
  37 namespace frontend {
  38
  39 namespace {
  40
  41 class prefix_p {
  42 public:
  43         string p;
  44         prefix_p(string const & s)
  45                 : p(s) {}
  46         bool operator()(string const & s) const {
  47                 return prefixIs(s, p);
  48         }
  49 };
  50
  51 } // end of anon namespace
  52
  53
  54 ControlCommandBuffer::ControlCommandBuffer(LyXView & lv)
  55         : lv_(lv), history_pos_(history_.end())
  56 {
  57         transform(lyxaction.func_begin(), lyxaction.func_end(),
  58                 back_inserter(commands_), firster());
  59 }
  60
  61
  62 string const ControlCommandBuffer::historyUp()
  63 {
  64         if (history_pos_ == history_.begin())
  65                 return string();
  66
  67         return *(--history_pos_);
  68 }
  69
  70
  71 string const ControlCommandBuffer::historyDown()
  72 {
  73         if (history_pos_ == history_.end())
  74                 return string();
  75         if (history_pos_ + 1 == history_.end())
  76                 return string();
  77
  78         return *(++history_pos_);
  79 }
  80
  81
  82 string const ControlCommandBuffer::getCurrentState() const
  83 {
  84         return lv_.view()->cursor().currentState();
  85 }
  86
  87
  88 vector<string> const
  89 ControlCommandBuffer::completions(string const & prefix, string & new_prefix)
  90 {
  91         vector<string> comp;
  92
  93         copy_if(commands_.begin(), commands_.end(),
  94                 back_inserter(comp), prefix_p(prefix));
  95
  96         if (comp.empty()) {
  97                 new_prefix = prefix;
  98                 return comp;
  99         }
 100
 101         if (comp.size() == 1) {
 102                 new_prefix = comp[0];
 103                 return vector<string>();
 104         }
 105
 106         // find maximal available prefix
 107         string const tmp = comp[0];
 108         string test = prefix;
 109         if (tmp.length() > test.length())
 110                 test += tmp[test.length()];
 111         while (test.length() < tmp.length()) {
 112                 vector<string> vtmp;
 113                 copy_if(comp.begin(), comp.end(),
 114                         back_inserter(vtmp), prefix_p(test));
 115                 if (vtmp.size() != comp.size()) {
 116                         test.erase(test.length() - 1);
 117                         break;
 118                 }
 119                 test += tmp[test.length()];
 120         }
 121
 122         new_prefix = test;
 123         return comp;
 124 }
 125
 126
 127 void ControlCommandBuffer::dispatch(string const & str)
 128 {
 129         if (str.empty())
 130                 return;
 131
 132         history_.push_back(str);
 133         history_pos_ = history_.end();
 134         FuncRequest func = lyxaction.lookupFunc(str);
 135         func.origin = FuncRequest::COMMANDBUFFER;
 136         lv_.getLyXFunc().dispatch(func);
 137 }
 138
 139 } // namespace frontend
 140 } // namespace lyx