contrib/src/stc/scintilla/src/LexConf.cxx

   1 // Scintilla source code edit control
   2 /** @file LexConf.cxx
   3  ** Lexer for Apache Configuration Files.
   4  **
   5  ** First working version contributed by Ahmad Zawawi <zeus_go64@hotmail.com> on October 28, 2000.
   6  ** i created this lexer because i needed something pretty when dealing
   7  ** when Apache Configuration files...
   8  **/
   9 // Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
  10 // The License.txt file describes the conditions under which this software may be distributed.
  11
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <ctype.h>
  15 #include <stdio.h>
  16 #include <stdarg.h>
  17
  18 #include "Platform.h"
  19
  20 #include "PropSet.h"
  21 #include "Accessor.h"
  22 #include "KeyWords.h"
  23 #include "Scintilla.h"
  24 #include "SciLexer.h"
  25
  26 static void ColouriseConfDoc(unsigned int startPos, int length, int, WordList *keywordLists[], Accessor &styler)
  27 {
  28         int state = SCE_CONF_DEFAULT;
  29         char chNext = styler[startPos];
  30         int lengthDoc = startPos + length;
  31         // create a buffer large enough to take the largest chunk...
  32         char *buffer = new char[length];
  33         int bufferCount = 0;
  34
  35         // this assumes that we have 2 keyword list in conf.properties
  36         WordList &directives = *keywordLists[0];
  37         WordList &params = *keywordLists[1];
  38
  39         // go through all provided text segment
  40         // using the hand-written state machine shown below
  41         styler.StartAt(startPos);
  42         styler.StartSegment(startPos);
  43         for (int i = startPos; i < lengthDoc; i++) {
  44                 char ch = chNext;
  45                 chNext = styler.SafeGetCharAt(i + 1);
  46
  47                 if (styler.IsLeadByte(ch)) {
  48                         chNext = styler.SafeGetCharAt(i + 2);
  49                         i++;
  50                         continue;
  51                 }
  52                 switch(state) {
  53                         case SCE_CONF_DEFAULT:
  54                                 if( ch == '\n' || ch == '\r' || ch == '\t' || ch == ' ') {
  55                                         // whitespace is simply ignored here...
  56                                         styler.ColourTo(i,SCE_CONF_DEFAULT);
  57                                         break;
  58                                 } else if( ch == '#' ) {
  59                                         // signals the start of a comment...
  60                                         state = SCE_CONF_COMMENT;
  61                                         styler.ColourTo(i,SCE_CONF_COMMENT);
  62                                 } else if( ch == '.' /*|| ch == '/'*/) {
  63                                         // signals the start of a file...
  64                                         state = SCE_CONF_EXTENSION;
  65                                         styler.ColourTo(i,SCE_CONF_EXTENSION);
  66                                 } else if( ch == '"') {
  67                                         state = SCE_CONF_STRING;
  68                                         styler.ColourTo(i,SCE_CONF_STRING);
  69                                 } else if( ispunct(ch) ) {
  70                                         // signals an operator...
  71                                         // no state jump necessary for this
  72                                         // simple case...
  73                                         styler.ColourTo(i,SCE_CONF_OPERATOR);
  74                                 } else if( isalpha(ch) ) {
  75                                         // signals the start of an identifier
  76                                         bufferCount = 0;
  77                                         buffer[bufferCount++] = static_cast<char>(tolower(ch));
  78                                         state = SCE_CONF_IDENTIFIER;
  79                                 } else if( isdigit(ch) ) {
  80                                         // signals the start of a number
  81                                         bufferCount = 0;
  82                                         buffer[bufferCount++] = ch;
  83                                         //styler.ColourTo(i,SCE_CONF_NUMBER);
  84                                         state = SCE_CONF_NUMBER;
  85                                 } else {
  86                                         // style it the default style..
  87                                         styler.ColourTo(i,SCE_CONF_DEFAULT);
  88                                 }
  89                                 break;
  90
  91                         case SCE_CONF_COMMENT:
  92                                 // if we find a newline here,
  93                                 // we simply go to default state
  94                                 // else continue to work on it...
  95                                 if( ch == '\n' || ch == '\r' ) {
  96                                         state = SCE_CONF_DEFAULT;
  97                                 } else {
  98                                         styler.ColourTo(i,SCE_CONF_COMMENT);
  99                                 }
 100                                 break;
 101
 102                         case SCE_CONF_EXTENSION:
 103                                 // if we find a non-alphanumeric char,
 104                                 // we simply go to default state
 105                                 // else we're still dealing with an extension...
 106                                 if( isalnum(ch) || (ch == '_') ||
 107                                         (ch == '-') || (ch == '$') ||
 108                                         (ch == '/') || (ch == '.') || (ch == '*') )
 109                                 {
 110                                         styler.ColourTo(i,SCE_CONF_EXTENSION);
 111                                 } else {
 112                                         state = SCE_CONF_DEFAULT;
 113                                         chNext = styler[i--];
 114                                 }
 115                                 break;
 116
 117                         case SCE_CONF_STRING:
 118                                 // if we find the end of a string char, we simply go to default state
 119                                 // else we're still dealing with an string...
 120                                 if( (ch == '"' && styler.SafeGetCharAt(i-1)!='\\') || (ch == '\n') || (ch == '\r') ) {
 121                                         state = SCE_CONF_DEFAULT;
 122                                 }
 123                                 styler.ColourTo(i,SCE_CONF_STRING);
 124                                 break;
 125
 126                         case SCE_CONF_IDENTIFIER:
 127                                 // stay  in CONF_IDENTIFIER state until we find a non-alphanumeric
 128                                 if( isalnum(ch) || (ch == '_') || (ch == '-') || (ch == '/') || (ch == '$') || (ch == '.') || (ch == '*')) {
 129                                         buffer[bufferCount++] = static_cast<char>(tolower(ch));
 130                                 } else {
 131                                         state = SCE_CONF_DEFAULT;
 132                                         buffer[bufferCount] = '\0';
 133
 134                                         // check if the buffer contains a keyword, and highlight it if it is a keyword...
 135                                         if(directives.InList(buffer)) {
 136                                                 styler.ColourTo(i-1,SCE_CONF_DIRECTIVE );
 137                                         } else if(params.InList(buffer)) {
 138                                                 styler.ColourTo(i-1,SCE_CONF_PARAMETER );
 139                                         } else if(strchr(buffer,'/') || strchr(buffer,'.')) {
 140                                                 styler.ColourTo(i-1,SCE_CONF_EXTENSION);
 141                                         } else {
 142                                                 styler.ColourTo(i-1,SCE_CONF_DEFAULT);
 143                                         }
 144
 145                                         // push back the faulty character
 146                                         chNext = styler[i--];
 147
 148                                 }
 149                                 break;
 150
 151                         case SCE_CONF_NUMBER:
 152                                 // stay  in CONF_NUMBER state until we find a non-numeric
 153                                 if( isdigit(ch) || ch == '.') {
 154                                         buffer[bufferCount++] = ch;
 155                                 } else {
 156                                         state = SCE_CONF_DEFAULT;
 157                                         buffer[bufferCount] = '\0';
 158
 159                                         // Colourize here...
 160                                         if( strchr(buffer,'.') ) {
 161                                                 // it is an IP address...
 162                                                 styler.ColourTo(i-1,SCE_CONF_IP);
 163                                         } else {
 164                                                 // normal number
 165                                                 styler.ColourTo(i-1,SCE_CONF_NUMBER);
 166                                         }
 167
 168                                         // push back a character
 169                                         chNext = styler[i--];
 170                                 }
 171                                 break;
 172
 173                 }
 174         }
 175         delete []buffer;
 176 }
 177
 178 static const char * const confWordListDesc[] = {
 179         "Directives",
 180         "Parameters",
 181         0
 182 };
 183
 184 LexerModule lmConf(SCLEX_CONF, ColouriseConfDoc, "conf", 0, confWordListDesc);