src/stc/scintilla/src/LexFlagship.cxx

   1 // Scintilla source code edit control
   2 /** @file LexFlagShip.cxx
   3  ** Lexer for FlagShip
   4  ** (Syntactically compatible to other XBase dialects, like dBase, Clipper, Fox etc.)
   5  **/
   6 // Copyright 2005 by Randy Butler
   7 // Copyright 1998-2003 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 "StyleContext.h"
  21 #include "KeyWords.h"
  22 #include "Scintilla.h"
  23 #include "SciLexer.h"
  24
  25 static bool IsFlagShipComment(Accessor &styler, int pos, int len) {
  26         return len>0 && styler[pos]=='\'';
  27 }
  28
  29 static inline bool IsTypeCharacter(int ch) {
  30         return ch == '%' || ch == '&' || ch == '@' || ch == '!' || ch == '#' || ch == '$';
  31 }
  32
  33 // Extended to accept accented characters
  34 static inline bool IsAWordChar(int ch) {
  35         return ch >= 0x80 ||
  36                (isalnum(ch) || ch == '.' || ch == '_');
  37 }
  38
  39 static inline bool IsAWordStart(int ch) {
  40         return ch >= 0x80 ||
  41                (isalnum(ch) || ch == '_');
  42 }
  43
  44 static inline bool IsADateCharacter(const int ch) {
  45         return (ch < 0x80) &&
  46                 (isalnum(ch) || ch == '|' || ch == '-' || ch == '/' || ch == ':' || ch == ' ' || ch == '\t');
  47 }
  48
  49
  50 static void ColouriseFlagShipDoc(unsigned int startPos, int length, int initStyle,
  51                            WordList *keywordlists[], Accessor &styler) {
  52
  53         //bool FSScriptSyntax = true;
  54         WordList &keywords = *keywordlists[0];
  55         WordList &keywords2 = *keywordlists[1];
  56         WordList &keywords3 = *keywordlists[2];
  57         WordList &keywords4 = *keywordlists[3];
  58
  59         styler.StartAt(startPos);
  60
  61         int visibleChars = 0;
  62
  63         StyleContext sc(startPos, length, initStyle, styler);
  64
  65         for (; sc.More(); sc.Forward()) {
  66
  67                 if (sc.state == SCE_FS_OPERATOR) {
  68                         sc.SetState(SCE_FS_DEFAULT);
  69                 } else if (sc.state == SCE_FS_IDENTIFIER) {
  70                         if (!IsAWordChar(sc.ch)) {
  71                                 char s[100];
  72                                 sc.GetCurrentLowered(s, sizeof(s));
  73                                 if (keywords.InList(s)) {
  74                                         sc.ChangeState(SCE_FS_KEYWORD);
  75                                 } else if (keywords2.InList(s)) {
  76                                         sc.ChangeState(SCE_FS_KEYWORD2);
  77                                 } else if (keywords3.InList(s)) {
  78                                         sc.ChangeState(SCE_FS_KEYWORD3);
  79                                 } else if (keywords4.InList(s)) {
  80                                         sc.ChangeState(SCE_FS_KEYWORD4);
  81                                 }// Else, it is really an identifier...
  82                                 sc.SetState(SCE_FS_DEFAULT);
  83                         }
  84                 } else if (sc.state == SCE_FS_NUMBER) {
  85                         if (!IsAWordChar(sc.ch)) {
  86                                 sc.SetState(SCE_FS_DEFAULT);
  87                         }
  88                 } else if (sc.state == SCE_FS_STRING) {
  89                         // VB doubles quotes to preserve them, so just end this string
  90                         // state now as a following quote will start again
  91                         if (sc.ch == '\"') {
  92                                 if (tolower(sc.chNext) == 'c') {
  93                                         sc.Forward();
  94                                 }
  95                                 sc.ForwardSetState(SCE_FS_DEFAULT);
  96                         } else if (sc.atLineEnd) {
  97                                 sc.ChangeState(SCE_FS_STRINGEOL);
  98                                 sc.ForwardSetState(SCE_FS_DEFAULT);
  99                         }
 100                 } else if (sc.state == SCE_FS_COMMENT) {
 101                         if (sc.Match('*', '/')) {   // new code
 102                                 sc.Forward();
 103                                 sc.ForwardSetState(SCE_FS_DEFAULT);
 104                         //if (sc.atLineEnd) {       // old code
 105                         //      sc.SetState(SCE_FS_DEFAULT);
 106                         }
 107                 } else if (sc.state == SCE_FS_COMMENTLINE) {  //new code
 108                         if (sc.ch == '\r' || sc.ch == '\n') {
 109                                 sc.SetState(SCE_FS_DEFAULT);
 110                                 visibleChars = 0;
 111                         }
 112                 } else if (sc.state == SCE_FS_PREPROCESSOR) {
 113                         if (sc.atLineEnd) {
 114                                 sc.SetState(SCE_FS_DEFAULT);
 115                         }
 116                 } else if (sc.state == SCE_FS_DATE) {
 117                         if (sc.ch == '#' || !IsADateCharacter(sc.chNext)) {
 118                                 sc.ForwardSetState(SCE_FS_DEFAULT);
 119                         }
 120                 }
 121
 122                 // Determine if a new state should be entered.
 123                 if (sc.state == SCE_FS_DEFAULT) {
 124                         if (sc.Match('/', '*')) {  // New code
 125                                 sc.SetState(SCE_FS_COMMENT);
 126                                 sc.Forward();   // Eat the * so it isn't used for the end of the comment
 127                         //if (sc.ch == '\'') {  // Old code
 128                         //      sc.SetState(SCE_FS_COMMENT); // old code
 129                         } else if (sc.Match('/', '/')) { // New code
 130                                 sc.SetState(SCE_FS_COMMENTLINE);
 131                         } else if (sc.ch == '\"') {
 132                                 sc.SetState(SCE_FS_STRING);
 133                         } else if (sc.ch == '#' && visibleChars == 0) {
 134                                 // Preprocessor commands are alone on their line
 135                                 sc.SetState(SCE_FS_PREPROCESSOR);
 136                         } else if (sc.ch == '#') {
 137                                 int n = 1;
 138                                 int chSeek = ' ';
 139                                 while ((n < 100) && (chSeek == ' ' || chSeek == '\t')) {
 140                                         chSeek = sc.GetRelative(n);
 141                                         n++;
 142                                 }
 143                                 if (IsADigit(chSeek)) {
 144                                         sc.SetState(SCE_FS_DATE);
 145                                 } else {
 146                                         sc.SetState(SCE_FS_OPERATOR);
 147                                 }
 148                         } else if (sc.ch == '&' && tolower(sc.chNext) == 'h') {
 149                                 sc.SetState(SCE_FS_NUMBER);
 150                         } else if (sc.ch == '&' && tolower(sc.chNext) == 'o') {
 151                                 sc.SetState(SCE_FS_NUMBER);
 152                         } else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 153                                 sc.SetState(SCE_FS_NUMBER);
 154                         } else if (IsAWordStart(sc.ch) || (sc.ch == '[')) {
 155                                 sc.SetState(SCE_FS_IDENTIFIER);
 156                         } else if (isoperator(static_cast<char>(sc.ch)) || (sc.ch == '\\')) {
 157                                 sc.SetState(SCE_FS_OPERATOR);
 158                         }
 159                 }
 160
 161                 if (sc.atLineEnd) {
 162                         visibleChars = 0;
 163                 }
 164                 if (!IsASpace(sc.ch)) {
 165                         visibleChars++;
 166                 }
 167         }
 168         sc.Complete();
 169 }
 170
 171 static void FoldFlagShipDoc(unsigned int startPos, int length, int,
 172                                                    WordList *[], Accessor &styler) {
 173
 174         int endPos = startPos + length;
 175
 176         // Backtrack to previous line in case need to fix its fold status
 177         int lineCurrent = styler.GetLine(startPos);
 178         if (startPos > 0) {
 179                 if (lineCurrent > 0) {
 180                         lineCurrent--;
 181                         startPos = styler.LineStart(lineCurrent);
 182                 }
 183         }
 184         int spaceFlags = 0;
 185         int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, IsFlagShipComment);
 186         char chNext = styler[startPos];
 187         for (int i = startPos; i < endPos; i++) {
 188                 char ch = chNext;
 189                 chNext = styler.SafeGetCharAt(i + 1);
 190
 191                 if ((ch == '\r' && chNext != '\n') || (ch == '\n') || (i == endPos)) {
 192                         int lev = indentCurrent;
 193                         int indentNext = styler.IndentAmount(lineCurrent + 1, &spaceFlags, IsFlagShipComment);
 194                         if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG)) {
 195                                 // Only non whitespace lines can be headers
 196                                 if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK)) {
 197                                         lev |= SC_FOLDLEVELHEADERFLAG;
 198                                 } else if (indentNext & SC_FOLDLEVELWHITEFLAG) {
 199                                         // Line after is blank so check the next - maybe should continue further?
 200                                         int spaceFlags2 = 0;
 201                                         int indentNext2 = styler.IndentAmount(lineCurrent + 2, &spaceFlags2, IsFlagShipComment);
 202                                         if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext2 & SC_FOLDLEVELNUMBERMASK)) {
 203                                                 lev |= SC_FOLDLEVELHEADERFLAG;
 204                                         }
 205                                 }
 206                         }
 207                         indentCurrent = indentNext;
 208                         styler.SetLevel(lineCurrent, lev);
 209                         lineCurrent++;
 210                 }
 211         }
 212 }
 213
 214
 215 static const char * const FSWordListDesc[] = {
 216         "Keywords",
 217         "functions",
 218         "user2",
 219         "user3",
 220         0
 221 };
 222
 223 LexerModule lmFlagShip(SCLEX_FLAGSHIP, ColouriseFlagShipDoc, "flagship", FoldFlagShipDoc, FSWordListDesc);
 224
 225
 226