ext/scintilla/src/LexCrontab.cxx

   1 // Scintilla source code edit control
   2 /** @file LexCrontab.cxx
   3  ** Lexer to use with extended crontab files used by a powerful
   4  ** Windows scheduler/event monitor/automation manager nnCron.
   5  ** (http://nemtsev.eserv.ru/)
   6  **/
   7 // Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
   8 // The License.txt file describes the conditions under which this software may be distributed.
   9
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <ctype.h>
  13 #include <stdio.h>
  14 #include <stdarg.h>
  15
  16 #include "Platform.h"
  17
  18 #include "PropSet.h"
  19 #include "Accessor.h"
  20 #include "KeyWords.h"
  21 #include "Scintilla.h"
  22 #include "SciLexer.h"
  23
  24 #ifdef SCI_NAMESPACE
  25 using namespace Scintilla;
  26 #endif
  27
  28 static void ColouriseNncrontabDoc(unsigned int startPos, int length, int, WordList
  29 *keywordLists[], Accessor &styler)
  30 {
  31         int state = SCE_NNCRONTAB_DEFAULT;
  32         char chNext = styler[startPos];
  33         int lengthDoc = startPos + length;
  34         // create a buffer large enough to take the largest chunk...
  35         char *buffer = new char[length];
  36         int bufferCount = 0;
  37         // used when highliting environment variables inside quoted string:
  38         bool insideString = false;
  39
  40         // this assumes that we have 3 keyword list in conf.properties
  41         WordList &section = *keywordLists[0];
  42         WordList &keyword = *keywordLists[1];
  43         WordList &modifier = *keywordLists[2];
  44
  45         // go through all provided text segment
  46         // using the hand-written state machine shown below
  47         styler.StartAt(startPos);
  48         styler.StartSegment(startPos);
  49         for (int i = startPos; i < lengthDoc; i++) {
  50                 char ch = chNext;
  51                 chNext = styler.SafeGetCharAt(i + 1);
  52
  53                 if (styler.IsLeadByte(ch)) {
  54                         chNext = styler.SafeGetCharAt(i + 2);
  55                         i++;
  56                         continue;
  57                 }
  58                 switch(state) {
  59                         case SCE_NNCRONTAB_DEFAULT:
  60                                 if( ch == '\n' || ch == '\r' || ch == '\t' || ch == ' ') {
  61                                         // whitespace is simply ignored here...
  62                                         styler.ColourTo(i,SCE_NNCRONTAB_DEFAULT);
  63                                         break;
  64                                 } else if( ch == '#' && styler.SafeGetCharAt(i+1) == '(') {
  65                                         // signals the start of a task...
  66                                         state = SCE_NNCRONTAB_TASK;
  67                                         styler.ColourTo(i,SCE_NNCRONTAB_TASK);
  68                                 }
  69                                   else if( ch == '\\' && (styler.SafeGetCharAt(i+1) == ' ' ||
  70                                                                                  styler.SafeGetCharAt(i+1) == '\t')) {
  71                                         // signals the start of an extended comment...
  72                                         state = SCE_NNCRONTAB_COMMENT;
  73                                         styler.ColourTo(i,SCE_NNCRONTAB_COMMENT);
  74                                 } else if( ch == '#' ) {
  75                                         // signals the start of a plain comment...
  76                                         state = SCE_NNCRONTAB_COMMENT;
  77                                         styler.ColourTo(i,SCE_NNCRONTAB_COMMENT);
  78                                 } else if( ch == ')' && styler.SafeGetCharAt(i+1) == '#') {
  79                                         // signals the end of a task...
  80                                         state = SCE_NNCRONTAB_TASK;
  81                                         styler.ColourTo(i,SCE_NNCRONTAB_TASK);
  82                                 } else if( ch == '"') {
  83                                         state = SCE_NNCRONTAB_STRING;
  84                                         styler.ColourTo(i,SCE_NNCRONTAB_STRING);
  85                                 } else if( ch == '%') {
  86                                         // signals environment variables
  87                                         state = SCE_NNCRONTAB_ENVIRONMENT;
  88                                         styler.ColourTo(i,SCE_NNCRONTAB_ENVIRONMENT);
  89                                 } else if( ch == '<' && styler.SafeGetCharAt(i+1) == '%') {
  90                                         // signals environment variables
  91                                         state = SCE_NNCRONTAB_ENVIRONMENT;
  92                                         styler.ColourTo(i,SCE_NNCRONTAB_ENVIRONMENT);
  93                                 } else if( ch == '*' ) {
  94                                         // signals an asterisk
  95                                         // no state jump necessary for this simple case...
  96                                         styler.ColourTo(i,SCE_NNCRONTAB_ASTERISK);
  97                                 } else if( isalpha(ch) || ch == '<' ) {
  98                                         // signals the start of an identifier
  99                                         bufferCount = 0;
 100                                         buffer[bufferCount++] = ch;
 101                                         state = SCE_NNCRONTAB_IDENTIFIER;
 102                                 } else if( isdigit(ch) ) {
 103                                         // signals the start of a number
 104                                         bufferCount = 0;
 105                                         buffer[bufferCount++] = ch;
 106                                         state = SCE_NNCRONTAB_NUMBER;
 107                                 } else {
 108                                         // style it the default style..
 109                                         styler.ColourTo(i,SCE_NNCRONTAB_DEFAULT);
 110                                 }
 111                                 break;
 112
 113                         case SCE_NNCRONTAB_COMMENT:
 114                                 // if we find a newline here,
 115                                 // we simply go to default state
 116                                 // else continue to work on it...
 117                                 if( ch == '\n' || ch == '\r' ) {
 118                                         state = SCE_NNCRONTAB_DEFAULT;
 119                                 } else {
 120                                         styler.ColourTo(i,SCE_NNCRONTAB_COMMENT);
 121                                 }
 122                                 break;
 123
 124                         case SCE_NNCRONTAB_TASK:
 125                                 // if we find a newline here,
 126                                 // we simply go to default state
 127                                 // else continue to work on it...
 128                                 if( ch == '\n' || ch == '\r' ) {
 129                                         state = SCE_NNCRONTAB_DEFAULT;
 130                                 } else {
 131                                         styler.ColourTo(i,SCE_NNCRONTAB_TASK);
 132                                 }
 133                                 break;
 134
 135                         case SCE_NNCRONTAB_STRING:
 136                                 if( ch == '%' ) {
 137                                         state = SCE_NNCRONTAB_ENVIRONMENT;
 138                                         insideString = true;
 139                                         styler.ColourTo(i-1,SCE_NNCRONTAB_STRING);
 140                                         break;
 141                                 }
 142                                 // if we find the end of a string char, we simply go to default state
 143                                 // else we're still dealing with an string...
 144                                 if( (ch == '"' && styler.SafeGetCharAt(i-1)!='\\') ||
 145                                         (ch == '\n') || (ch == '\r') ) {
 146                                         state = SCE_NNCRONTAB_DEFAULT;
 147                                 }
 148                                 styler.ColourTo(i,SCE_NNCRONTAB_STRING);
 149                                 break;
 150
 151                         case SCE_NNCRONTAB_ENVIRONMENT:
 152                                 // if we find the end of a string char, we simply go to default state
 153                                 // else we're still dealing with an string...
 154                                 if( ch == '%' && insideString ) {
 155                                         state = SCE_NNCRONTAB_STRING;
 156                                         insideString = false;
 157                                         break;
 158                                 }
 159                                 if( (ch == '%' && styler.SafeGetCharAt(i-1)!='\\')
 160                                         || (ch == '\n') || (ch == '\r') || (ch == '>') ) {
 161                                         state = SCE_NNCRONTAB_DEFAULT;
 162                                         styler.ColourTo(i,SCE_NNCRONTAB_ENVIRONMENT);
 163                                         break;
 164                                 }
 165                                 styler.ColourTo(i+1,SCE_NNCRONTAB_ENVIRONMENT);
 166                                 break;
 167
 168                         case SCE_NNCRONTAB_IDENTIFIER:
 169                                 // stay  in CONF_IDENTIFIER state until we find a non-alphanumeric
 170                                 if( isalnum(ch) || (ch == '_') || (ch == '-') || (ch == '/') ||
 171                                         (ch == '$') || (ch == '.') || (ch == '<') || (ch == '>') ||
 172                                         (ch == '@') ) {
 173                                         buffer[bufferCount++] = ch;
 174                                 } else {
 175                                         state = SCE_NNCRONTAB_DEFAULT;
 176                                         buffer[bufferCount] = '\0';
 177
 178                                         // check if the buffer contains a keyword,
 179                                         // and highlight it if it is a keyword...
 180                                         if(section.InList(buffer)) {
 181                                                 styler.ColourTo(i,SCE_NNCRONTAB_SECTION );
 182                                         } else if(keyword.InList(buffer)) {
 183                                                 styler.ColourTo(i-1,SCE_NNCRONTAB_KEYWORD );
 184                                         } // else if(strchr(buffer,'/') || strchr(buffer,'.')) {
 185                                         //      styler.ColourTo(i-1,SCE_NNCRONTAB_EXTENSION);
 186                                         // }
 187                                           else if(modifier.InList(buffer)) {
 188                                                 styler.ColourTo(i-1,SCE_NNCRONTAB_MODIFIER );
 189                                           }     else {
 190                                                 styler.ColourTo(i-1,SCE_NNCRONTAB_DEFAULT);
 191                                         }
 192                                         // push back the faulty character
 193                                         chNext = styler[i--];
 194                                 }
 195                                 break;
 196
 197                         case SCE_NNCRONTAB_NUMBER:
 198                                 // stay  in CONF_NUMBER state until we find a non-numeric
 199                                 if( isdigit(ch) /* || ch == '.' */ ) {
 200                                         buffer[bufferCount++] = ch;
 201                                 } else {
 202                                         state = SCE_NNCRONTAB_DEFAULT;
 203                                         buffer[bufferCount] = '\0';
 204                                         // Colourize here... (normal number)
 205                                         styler.ColourTo(i-1,SCE_NNCRONTAB_NUMBER);
 206                                         // push back a character
 207                                         chNext = styler[i--];
 208                                 }
 209                                 break;
 210                 }
 211         }
 212         delete []buffer;
 213 }
 214
 215 static const char * const cronWordListDesc[] = {
 216         "Section keywords and Forth words",
 217         "nnCrontab keywords",
 218         "Modifiers",
 219         0
 220 };
 221
 222 LexerModule lmNncrontab(SCLEX_NNCRONTAB, ColouriseNncrontabDoc, "nncrontab", 0, cronWordListDesc);