Highlight.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2014  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  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 #include "Code.hpp"
  28
  29 static void Skip(const char *data, size_t size, std::ostream &output, size_t &offset, cy::position &current, cy::position target) {
  30     while (current.line != target.line || current.column != target.column) {
  31         _assert(offset != size);
  32         char next(data[offset++]);
  33
  34         output.put(next);
  35
  36         _assert(current.line < target.line || current.line == target.line && current.column < target.column);
  37         if (next == '\n')
  38             current.lines();
  39         else
  40             current.columns();
  41     }
  42 }
  43
  44 struct CYColor {
  45     bool bold_;
  46     unsigned code_;
  47
  48     CYColor() {
  49     }
  50
  51     CYColor(bool bold, unsigned code) :
  52         bold_(bold),
  53         code_(code)
  54     {
  55     }
  56 };
  57
  58 void CYLexerHighlight(const char *data, size_t size, std::ostream &output, bool ignore) {
  59     CYStream stream(data, data + size);
  60     CYDriver driver(stream);
  61     driver.commented_ = true;
  62
  63     size_t offset(0);
  64     cy::position current;
  65
  66     CYLocalPool pool;
  67
  68     YYSTYPE value;
  69     cy::location location;
  70
  71     while (cylex(&value, &location, driver.scanner_) != 0) {
  72         CYColor color;
  73
  74         switch (value.highlight_) {
  75             case hi::Comment: color = CYColor(true, 30); break;
  76             case hi::Constant: color = CYColor(false, 31); break;
  77             case hi::Control: color = CYColor(false, 33); break;
  78             case hi::Error: color = CYColor(true, 31); break;
  79             case hi::Identifier: color = CYColor(false, 0); break;
  80             case hi::Meta: color = CYColor(false, 32); break;
  81             case hi::Nothing: color = CYColor(false, 0); break;
  82             case hi::Operator: color = CYColor(false, 36); break;
  83             case hi::Special: color = CYColor(false, 35); break;
  84             case hi::Structure: color = CYColor(true, 34); break;
  85             case hi::Type: color = CYColor(true, 34); break;
  86
  87             // XXX: maybe I should use nodefault here?
  88             default: color = CYColor(true, 0); break;
  89         }
  90
  91         Skip(data, size, output, offset, current, location.begin);
  92
  93         if (color.code_ != 0) {
  94             if (ignore)
  95                 output << CYIgnoreStart;
  96             output << "\e[" << (color.bold_ ? '1' : '0') << ";" << color.code_ << "m";
  97             if (ignore)
  98                 output << CYIgnoreEnd;
  99         }
 100
 101         Skip(data, size, output, offset, current, location.end);
 102
 103         if (color.code_ != 0) {
 104             if (ignore)
 105                 output << CYIgnoreStart;
 106             output << "\e[0m";
 107             if (ignore)
 108                 output << CYIgnoreEnd;
 109         }
 110     }
 111
 112     output.write(data + offset, size - offset);
 113 }