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