Highlight.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2012  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Lesser General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify it under
   8  * the terms of the GNU Lesser General Public License as published by the
   9  * Free Software Foundation, either version 3 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "Highlight.hpp"
  23
  24 #include "Cycript.tab.hh"
  25 #include "Parser.hpp"
  26
  27 static void Skip(const char *data, size_t size, std::ostream &output, size_t &offset, cy::position &current, cy::position target) {
  28     while (current.line != target.line || current.column != target.column) {
  29         _assert(offset != size);
  30         char next(data[offset++]);
  31
  32         output.put(next);
  33
  34         _assert(current.line < target.line || current.line == target.line && current.column < target.column);
  35         if (next == '\n')
  36             current.lines();
  37         else
  38             current.columns();
  39     }
  40 }
  41
  42 struct CYColor {
  43     bool bold_;
  44     unsigned code_;
  45
  46     CYColor() {
  47     }
  48
  49     CYColor(bool bold, unsigned code) :
  50         bold_(bold),
  51         code_(code)
  52     {
  53     }
  54 };
  55
  56 void CYLexerHighlight(const char *data, size_t size, std::ostream &output, bool ignore) {
  57     CYStream stream(data, data + size);
  58     CYDriver driver(stream);
  59     driver.commented_ = true;
  60
  61     size_t offset(0);
  62     cy::position current;
  63
  64     CYLocalPool pool;
  65
  66     YYSTYPE value;
  67     cy::location location;
  68
  69     while (cylex(&value, &location, driver.scanner_) != 0) {
  70         CYColor color;
  71
  72         switch (value.highlight_) {
  73             case hi::Comment: color = CYColor(true, 30); break;
  74             case hi::Constant: color = CYColor(false, 31); break;
  75             case hi::Control: color = CYColor(false, 33); break;
  76             case hi::Escape: color = CYColor(true, 31); break;
  77             case hi::Identifier: color = CYColor(false, 0); break;
  78             case hi::Meta: color = CYColor(false, 32); break;
  79             case hi::Nothing: color = CYColor(false, 0); break;
  80             case hi::Operator: color = CYColor(false, 36); break;
  81             case hi::Structure: color = CYColor(true, 34); break;
  82             case hi::Type: color = CYColor(true, 34); break;
  83         }
  84
  85         Skip(data, size, output, offset, current, location.begin);
  86
  87         if (color.code_ != 0) {
  88             if (ignore)
  89                 output << CYIgnoreStart;
  90             output << "\e[" << (color.bold_ ? '1' : '0') << ";" << color.code_ << "m";
  91             if (ignore)
  92                 output << CYIgnoreEnd;
  93         }
  94
  95         Skip(data, size, output, offset, current, location.end);
  96
  97         if (color.code_ != 0) {
  98             if (ignore)
  99                 output << CYIgnoreStart;
 100             output << "\e[0m";
 101             if (ignore)
 102                 output << CYIgnoreEnd;
 103         }
 104     }
 105
 106     output.write(data + offset, size - offset);
 107 }