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