ext/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 #ifdef SCI_NAMESPACE
  26 using namespace Scintilla;
  27 #endif
  28
  29 static bool IsFlagShipComment(Accessor &styler, int pos, int len) {
  30         return len>0 && styler[pos]=='\'';
  31 }
  32
  33 static inline bool IsTypeCharacter(int ch) {
  34         return ch == '%' || ch == '&' || ch == '@' || ch == '!' || ch == '#' || ch == '$';
  35 }
  36
  37 // Extended to accept accented characters
  38 static inline bool IsAWordChar(int ch) {
  39         return ch >= 0x80 ||
  40                (isalnum(ch) || ch == '.' || ch == '_');
  41 }
  42
  43 static inline bool IsAWordStart(int ch) {
  44         return ch >= 0x80 ||
  45                (isalnum(ch) || ch == '_');
  46 }
  47
  48 static inline bool IsADateCharacter(const int ch) {
  49         return (ch < 0x80) &&
  50                 (isalnum(ch) || ch == '|' || ch == '-' || ch == '/' || ch == ':' || ch == ' ' || ch == '\t');
  51 }
  52
  53
  54 static void ColouriseFlagShipDoc(unsigned int startPos, int length, int initStyle,
  55                            WordList *keywordlists[], Accessor &styler) {
  56
  57         //bool FSScriptSyntax = true;
  58         WordList &keywords = *keywordlists[0];
  59         WordList &keywords2 = *keywordlists[1];
  60         WordList &keywords3 = *keywordlists[2];
  61         WordList &keywords4 = *keywordlists[3];
  62
  63         styler.StartAt(startPos);
  64
  65         int visibleChars = 0;
  66
  67         StyleContext sc(startPos, length, initStyle, styler);
  68
  69         for (; sc.More(); sc.Forward()) {
  70
  71                 if (sc.state == SCE_FS_OPERATOR) {
  72                         sc.SetState(SCE_FS_DEFAULT);
  73                 } else if (sc.state == SCE_FS_IDENTIFIER) {
  74                         if (!IsAWordChar(sc.ch)) {
  75                                 char s[100];
  76                                 sc.GetCurrentLowered(s, sizeof(s));
  77                                 if (keywords.InList(s)) {
  78                                         sc.ChangeState(SCE_FS_KEYWORD);
  79                                 } else if (keywords2.InList(s)) {
  80                                         sc.ChangeState(SCE_FS_KEYWORD2);
  81                                 } else if (keywords3.InList(s)) {
  82                                         sc.ChangeState(SCE_FS_KEYWORD3);
  83                                 } else if (keywords4.InList(s)) {
  84                                         sc.ChangeState(SCE_FS_KEYWORD4);
  85                                 }// Else, it is really an identifier...
  86                                 sc.SetState(SCE_FS_DEFAULT);
  87                         }
  88                 } else if (sc.state == SCE_FS_NUMBER) {
  89                         if (!IsAWordChar(sc.ch)) {
  90                                 sc.SetState(SCE_FS_DEFAULT);
  91                         }
  92                 } else if (sc.state == SCE_FS_STRING) {
  93                         // VB doubles quotes to preserve them, so just end this string
  94                         // state now as a following quote will start again
  95                         if (sc.ch == '\"') {
  96                                 if (tolower(sc.chNext) == 'c') {
  97                                         sc.Forward();
  98                                 }
  99                                 sc.ForwardSetState(SCE_FS_DEFAULT);
 100                         } else if (sc.atLineEnd) {
 101                                 sc.ChangeState(SCE_FS_STRINGEOL);
 102                                 sc.ForwardSetState(SCE_FS_DEFAULT);
 103                         }
 104                 } else if (sc.state == SCE_FS_COMMENT) {
 105                         if (sc.Match('*', '/')) {   // new code
 106                                 sc.Forward();
 107                                 sc.ForwardSetState(SCE_FS_DEFAULT);
 108                         //if (sc.atLineEnd) {       // old code
 109                         //      sc.SetState(SCE_FS_DEFAULT);
 110                         }
 111                 } else if (sc.state == SCE_FS_COMMENTLINE) {  //new code
 112                         if (sc.ch == '\r' || sc.ch == '\n') {
 113                                 sc.SetState(SCE_FS_DEFAULT);
 114                                 visibleChars = 0;
 115                         }
 116                 } else if (sc.state == SCE_FS_PREPROCESSOR) {
 117                         if (sc.atLineEnd) {
 118                                 sc.SetState(SCE_FS_DEFAULT);
 119                         }
 120                 } else if (sc.state == SCE_FS_DATE) {
 121                         if (sc.ch == '#' || !IsADateCharacter(sc.chNext)) {
 122                                 sc.ForwardSetState(SCE_FS_DEFAULT);
 123                         }
 124                 }
 125
 126                 // Determine if a new state should be entered.
 127                 if (sc.state == SCE_FS_DEFAULT) {
 128                         if (sc.Match('/', '*')) {  // New code
 129                                 sc.SetState(SCE_FS_COMMENT);
 130                                 sc.Forward();   // Eat the * so it isn't used for the end of the comment
 131                         //if (sc.ch == '\'') {  // Old code
 132                         //      sc.SetState(SCE_FS_COMMENT); // old code
 133                         } else if (sc.Match('/', '/')) { // New code
 134                                 sc.SetState(SCE_FS_COMMENTLINE);
 135                         } else if (sc.ch == '\"') {
 136                                 sc.SetState(SCE_FS_STRING);
 137                         } else if (sc.ch == '#' && visibleChars == 0) {
 138                                 // Preprocessor commands are alone on their line
 139                                 sc.SetState(SCE_FS_PREPROCESSOR);
 140                         } else if (sc.ch == '#') {
 141                                 int n = 1;
 142                                 int chSeek = ' ';
 143                                 while ((n < 100) && (chSeek == ' ' || chSeek == '\t')) {
 144                                         chSeek = sc.GetRelative(n);
 145                                         n++;
 146                                 }
 147                                 if (IsADigit(chSeek)) {
 148                                         sc.SetState(SCE_FS_DATE);
 149                                 } else {
 150                                         sc.SetState(SCE_FS_OPERATOR);
 151                                 }
 152                         } else if (sc.ch == '&' && tolower(sc.chNext) == 'h') {
 153                                 sc.SetState(SCE_FS_NUMBER);
 154                         } else if (sc.ch == '&' && tolower(sc.chNext) == 'o') {
 155                                 sc.SetState(SCE_FS_NUMBER);
 156                         } else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 157                                 sc.SetState(SCE_FS_NUMBER);
 158                         } else if (IsAWordStart(sc.ch) || (sc.ch == '[')) {
 159                                 sc.SetState(SCE_FS_IDENTIFIER);
 160                         } else if (isoperator(static_cast<char>(sc.ch)) || (sc.ch == '\\')) {
 161                                 sc.SetState(SCE_FS_OPERATOR);
 162                         }
 163                 }
 164
 165                 if (sc.atLineEnd) {
 166                         visibleChars = 0;
 167                 }
 168                 if (!IsASpace(sc.ch)) {
 169                         visibleChars++;
 170                 }
 171         }
 172         sc.Complete();
 173 }
 174
 175 static void FoldFlagShipDoc(unsigned int startPos, int length, int,
 176                                                    WordList *[], Accessor &styler) {
 177
 178         int endPos = startPos + length;
 179
 180         // Backtrack to previous line in case need to fix its fold status
 181         int lineCurrent = styler.GetLine(startPos);
 182         if (startPos > 0) {
 183                 if (lineCurrent > 0) {
 184                         lineCurrent--;
 185                         startPos = styler.LineStart(lineCurrent);
 186                 }
 187         }
 188         int spaceFlags = 0;
 189         int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, IsFlagShipComment);
 190         char chNext = styler[startPos];
 191         for (int i = startPos; i < endPos; i++) {
 192                 char ch = chNext;
 193                 chNext = styler.SafeGetCharAt(i + 1);
 194
 195                 if ((ch == '\r' && chNext != '\n') || (ch == '\n') || (i == endPos)) {
 196                         int lev = indentCurrent;
 197                         int indentNext = styler.IndentAmount(lineCurrent + 1, &spaceFlags, IsFlagShipComment);
 198                         if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG)) {
 199                                 // Only non whitespace lines can be headers
 200                                 if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK)) {
 201                                         lev |= SC_FOLDLEVELHEADERFLAG;
 202                                 } else if (indentNext & SC_FOLDLEVELWHITEFLAG) {
 203                                         // Line after is blank so check the next - maybe should continue further?
 204                                         int spaceFlags2 = 0;
 205                                         int indentNext2 = styler.IndentAmount(lineCurrent + 2, &spaceFlags2, IsFlagShipComment);
 206                                         if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext2 & SC_FOLDLEVELNUMBERMASK)) {
 207                                                 lev |= SC_FOLDLEVELHEADERFLAG;
 208                                         }
 209                                 }
 210                         }
 211                         indentCurrent = indentNext;
 212                         styler.SetLevel(lineCurrent, lev);
 213                         lineCurrent++;
 214                 }
 215         }
 216 }
 217
 218
 219 static const char * const FSWordListDesc[] = {
 220         "Keywords",
 221         "functions",
 222         "user2",
 223         "user3",
 224         0
 225 };
 226
 227 LexerModule lmFlagShip(SCLEX_FLAGSHIP, ColouriseFlagShipDoc, "flagship", FoldFlagShipDoc, FSWordListDesc);
 228
 229
 230