Highlight.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2013  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 3 of the License,
  10  * or (at your option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "Highlight.hpp"
  23 #include "Parser.hpp"
  24
  25 #include "Cycript.tab.hh"
  26 #include "Driver.hpp"
  27
  28 static void Skip(const char *data, size_t size, std::ostream &output, size_t &offset, cy::position &current, cy::position target) {
  29     while (current.line != target.line || current.column != target.column) {
  30         _assert(offset != size);
  31         char next(data[offset++]);
  32
  33         output.put(next);
  34
  35         _assert(current.line < target.line || current.line == target.line && current.column < target.column);
  36         if (next == '\n')
  37             current.lines();
  38         else
  39             current.columns();
  40     }
  41 }
  42
  43 struct CYColor {
  44     bool bold_;
  45     unsigned code_;
  46
  47     CYColor() {
  48     }
  49
  50     CYColor(bool bold, unsigned code) :
  51         bold_(bold),
  52         code_(code)
  53     {
  54     }
  55 };
  56
  57 void CYLexerHighlight(const char *data, size_t size, std::ostream &output, bool ignore) {
  58     CYStream stream(data, data + size);
  59     CYDriver driver(stream);
  60     driver.commented_ = true;
  61
  62     size_t offset(0);
  63     cy::position current;
  64
  65     CYLocalPool pool;
  66
  67     YYSTYPE value;
  68     cy::location location;
  69
  70     while (cylex(&value, &location, driver.scanner_) != 0) {
  71         CYColor color;
  72
  73         switch (value.highlight_) {
  74             case hi::Comment: color = CYColor(true, 30); break;
  75             case hi::Constant: color = CYColor(false, 31); break;
  76             case hi::Control: color = CYColor(false, 33); break;
  77             case hi::Escape: color = CYColor(true, 31); break;
  78             case hi::Identifier: color = CYColor(false, 0); break;
  79             case hi::Meta: color = CYColor(false, 32); break;
  80             case hi::Nothing: color = CYColor(false, 0); break;
  81             case hi::Operator: color = CYColor(false, 36); break;
  82             case hi::Structure: color = CYColor(true, 34); break;
  83             case hi::Type: color = CYColor(true, 34); break;
  84
  85             // XXX: maybe I should use nodefault here?
  86             default: color = CYColor(true, 0); break;
  87         }
  88
  89         Skip(data, size, output, offset, current, location.begin);
  90
  91         if (color.code_ != 0) {
  92             if (ignore)
  93                 output << CYIgnoreStart;
  94             output << "\e[" << (color.bold_ ? '1' : '0') << ";" << color.code_ << "m";
  95             if (ignore)
  96                 output << CYIgnoreEnd;
  97         }
  98
  99         Skip(data, size, output, offset, current, location.end);
 100
 101         if (color.code_ != 0) {
 102             if (ignore)
 103                 output << CYIgnoreStart;
 104             output << "\e[0m";
 105             if (ignore)
 106                 output << CYIgnoreEnd;
 107         }
 108     }
 109
 110     output.write(data + offset, size - offset);
 111 }