ext/scintilla/lexers/LexASY.cxx

   1 // Scintilla source code edit control
   2 //Author: instanton (email: soft_share<at>126<dot>com)
   3 // The License.txt file describes the conditions under which this software may be distributed.
   4
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <stdio.h>
   8 #include <stdarg.h>
   9 #include <assert.h>
  10
  11 #include "ILexer.h"
  12 #include "Scintilla.h"
  13 #include "SciLexer.h"
  14
  15 #include "WordList.h"
  16 #include "LexAccessor.h"
  17 #include "Accessor.h"
  18 #include "StyleContext.h"
  19 #include "CharacterSet.h"
  20 #include "LexerModule.h"
  21
  22 #ifdef SCI_NAMESPACE
  23 using namespace Scintilla;
  24 #endif
  25
  26 static void ColouriseAsyDoc(unsigned int startPos, int length, int initStyle,
  27                 WordList *keywordlists[], Accessor &styler) {
  28
  29         WordList &keywords = *keywordlists[0];
  30         WordList &keywords2 = *keywordlists[1];
  31
  32         CharacterSet setWordStart(CharacterSet::setAlpha, "_", 0x80, true);
  33         CharacterSet setWord(CharacterSet::setAlphaNum, "._", 0x80, true);
  34
  35         int visibleChars = 0;
  36
  37         StyleContext sc(startPos, length, initStyle, styler);
  38
  39         for (; sc.More(); sc.Forward()) {
  40
  41                 if (sc.atLineStart) {
  42                         if (sc.state == SCE_ASY_STRING) {
  43                                 sc.SetState(SCE_ASY_STRING);
  44                         }
  45                         visibleChars = 0;
  46                 }
  47
  48                 if (sc.ch == '\\') {
  49                         if (sc.chNext == '\n' || sc.chNext == '\r') {
  50                                 sc.Forward();
  51                                 if (sc.ch == '\r' && sc.chNext == '\n') {
  52                                         sc.Forward();
  53                                 }
  54 //                              continuationLine = true;
  55                                 continue;
  56                         }
  57                 }
  58
  59                 // Determine if the current state should terminate.
  60                 switch (sc.state) {
  61                         case SCE_ASY_OPERATOR:
  62                                 sc.SetState(SCE_ASY_DEFAULT);
  63                                 break;
  64                         case SCE_ASY_NUMBER:
  65                                 if (!setWord.Contains(sc.ch)) {
  66                                         sc.SetState(SCE_ASY_DEFAULT);
  67                                 }
  68                                 break;
  69                         case SCE_ASY_IDENTIFIER:
  70                                 if (!setWord.Contains(sc.ch) || (sc.ch == '.')) {
  71                                         char s[1000];
  72                                         sc.GetCurrentLowered(s, sizeof(s));
  73                                         if (keywords.InList(s)) {
  74                                                 sc.ChangeState(SCE_ASY_WORD);
  75                                         } else if (keywords2.InList(s)) {
  76                                                 sc.ChangeState(SCE_ASY_WORD2);
  77                                         }
  78                                         sc.SetState(SCE_ASY_DEFAULT);
  79                                 }
  80                                 break;
  81                         case SCE_ASY_COMMENT:
  82                                 if (sc.Match('*', '/')) {
  83                                         sc.Forward();
  84                                         sc.ForwardSetState(SCE_ASY_DEFAULT);
  85                                 }
  86                                 break;
  87                         case SCE_ASY_COMMENTLINE:
  88                                 if (sc.atLineStart) {
  89                                         sc.SetState(SCE_ASY_DEFAULT);
  90                                 }
  91                                 break;
  92                         case SCE_ASY_STRING:
  93                                 if (sc.atLineEnd) {
  94                                         sc.ChangeState(SCE_ASY_STRINGEOL);
  95                                 } else if (sc.ch == '\\') {
  96                                         if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
  97                                                 sc.Forward();
  98                                         }
  99                                 } else if (sc.ch == '\"') {
 100                                         sc.ForwardSetState(SCE_ASY_DEFAULT);
 101                                 }
 102                                 break;
 103                         case SCE_ASY_CHARACTER:
 104                                 if (sc.atLineEnd) {
 105                                         sc.ChangeState(SCE_ASY_STRINGEOL);
 106                                 } else  if (sc.ch == '\\') {
 107                                         if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
 108                                                 sc.Forward();
 109                                         }
 110                                 } else if (sc.ch == '\'') {
 111                                         sc.ForwardSetState(SCE_ASY_DEFAULT);
 112                                 }
 113                                 break;
 114                 }
 115
 116                 // Determine if a new state should be entered.
 117                 if (sc.state == SCE_ASY_DEFAULT) {
 118                         if (setWordStart.Contains(sc.ch) || (sc.ch == '@')) {
 119                                 sc.SetState(SCE_ASY_IDENTIFIER);
 120                         } else if (sc.Match('/', '*')) {
 121                                 sc.SetState(SCE_ASY_COMMENT);
 122                                 sc.Forward();   //
 123                         } else if (sc.Match('/', '/')) {
 124                                 sc.SetState(SCE_ASY_COMMENTLINE);
 125                         } else if (sc.ch == '\"') {
 126                                 sc.SetState(SCE_ASY_STRING);
 127                         } else if (sc.ch == '\'') {
 128                                 sc.SetState(SCE_ASY_CHARACTER);
 129                         } else if (sc.ch == '#' && visibleChars == 0) {
 130                                 do {
 131                                         sc.Forward();
 132                                 } while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
 133                                 if (sc.atLineEnd) {
 134                                         sc.SetState(SCE_ASY_DEFAULT);
 135                                 }
 136                         } else if (isoperator(static_cast<char>(sc.ch))) {
 137                                 sc.SetState(SCE_ASY_OPERATOR);
 138                         }
 139                 }
 140
 141         }
 142         sc.Complete();
 143 }
 144
 145 static bool IsAsyCommentStyle(int style) {
 146         return style == SCE_ASY_COMMENT;
 147 }
 148
 149
 150 static inline bool isASYidentifier(int ch) {
 151         return
 152       ((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z')) ;
 153 }
 154
 155 static int ParseASYWord(unsigned int pos, Accessor &styler, char *word)
 156 {
 157   int length=0;
 158   char ch=styler.SafeGetCharAt(pos);
 159   *word=0;
 160
 161   while(isASYidentifier(ch) && length<100){
 162           word[length]=ch;
 163           length++;
 164           ch=styler.SafeGetCharAt(pos+length);
 165   }
 166   word[length]=0;
 167   return length;
 168 }
 169
 170 static bool IsASYDrawingLine(int line, Accessor &styler) {
 171         int pos = styler.LineStart(line);
 172         int eol_pos = styler.LineStart(line + 1) - 1;
 173
 174         int startpos = pos;
 175         char buffer[100]="";
 176
 177         while (startpos<eol_pos){
 178                 char ch = styler[startpos];
 179                 ParseASYWord(startpos,styler,buffer);
 180                 bool drawcommands = strncmp(buffer,"draw",4)==0||
 181                         strncmp(buffer,"pair",4)==0||strncmp(buffer,"label",5)==0;
 182                 if (!drawcommands && ch!=' ') return false;
 183                 else if (drawcommands) return true;
 184                 startpos++;
 185         }
 186         return false;
 187 }
 188
 189 static void FoldAsyDoc(unsigned int startPos, int length, int initStyle,
 190                                            WordList *[], Accessor &styler) {
 191         bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
 192         bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
 193         bool foldAtElse = styler.GetPropertyInt("fold.at.else", 0) != 0;
 194         unsigned int endPos = startPos + length;
 195         int visibleChars = 0;
 196         int lineCurrent = styler.GetLine(startPos);
 197         int levelCurrent = SC_FOLDLEVELBASE;
 198         if (lineCurrent > 0)
 199                 levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
 200         int levelMinCurrent = levelCurrent;
 201         int levelNext = levelCurrent;
 202         char chNext = styler[startPos];
 203         int styleNext = styler.StyleAt(startPos);
 204         int style = initStyle;
 205         for (unsigned int i = startPos; i < endPos; i++) {
 206                 char ch = chNext;
 207                 chNext = styler.SafeGetCharAt(i + 1);
 208                 int stylePrev = style;
 209                 style = styleNext;
 210                 styleNext = styler.StyleAt(i + 1);
 211                 bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
 212                 if (foldComment && IsAsyCommentStyle(style)) {
 213                         if (!IsAsyCommentStyle(stylePrev) && (stylePrev != SCE_ASY_COMMENTLINEDOC)) {
 214                                 levelNext++;
 215                         } else if (!IsAsyCommentStyle(styleNext) && (styleNext != SCE_ASY_COMMENTLINEDOC) && !atEOL) {
 216                                 levelNext--;
 217                         }
 218                 }
 219                 if (style == SCE_ASY_OPERATOR) {
 220                         if (ch == '{') {
 221                                 if (levelMinCurrent > levelNext) {
 222                                         levelMinCurrent = levelNext;
 223                                 }
 224                                 levelNext++;
 225                         } else if (ch == '}') {
 226                                 levelNext--;
 227                         }
 228                 }
 229
 230                 if (atEOL && IsASYDrawingLine(lineCurrent, styler)){
 231                         if (lineCurrent==0 && IsASYDrawingLine(lineCurrent + 1, styler))
 232                                 levelNext++;
 233                         else if (lineCurrent!=0 && !IsASYDrawingLine(lineCurrent - 1, styler)
 234                                 && IsASYDrawingLine(lineCurrent + 1, styler)
 235                                 )
 236                                 levelNext++;
 237                         else if (lineCurrent!=0 && IsASYDrawingLine(lineCurrent - 1, styler) &&
 238                                 !IsASYDrawingLine(lineCurrent+1, styler))
 239                                 levelNext--;
 240                 }
 241
 242                 if (atEOL) {
 243                         int levelUse = levelCurrent;
 244                         if (foldAtElse) {
 245                                 levelUse = levelMinCurrent;
 246                         }
 247                         int lev = levelUse | levelNext << 16;
 248                         if (visibleChars == 0 && foldCompact)
 249                                 lev |= SC_FOLDLEVELWHITEFLAG;
 250                         if (levelUse < levelNext)
 251                                 lev |= SC_FOLDLEVELHEADERFLAG;
 252                         if (lev != styler.LevelAt(lineCurrent)) {
 253                                 styler.SetLevel(lineCurrent, lev);
 254                         }
 255                         lineCurrent++;
 256                         levelCurrent = levelNext;
 257                         levelMinCurrent = levelCurrent;
 258                         visibleChars = 0;
 259                 }
 260                 if (!IsASpace(ch))
 261                         visibleChars++;
 262         }
 263 }
 264
 265 static const char * const asyWordLists[] = {
 266             "Primary keywords and identifiers",
 267             "Secondary keywords and identifiers",
 268             0,
 269         };
 270
 271 LexerModule lmASY(SCLEX_ASYMPTOTE, ColouriseAsyDoc, "asy", FoldAsyDoc, asyWordLists);