1 // Scintilla source code edit control
2 // @file LexASY.cxx
3 //Author: instanton (email: soft_share<at>126<dot>com)
4 // The License.txt file describes the conditions under which this software may be distributed.
5 
6 #include <stdlib.h>
7 #include <string.h>
8 #include <stdio.h>
9 #include <stdarg.h>
10 #include <assert.h>
11 
12 #include "ILexer.h"
13 #include "Scintilla.h"
14 #include "SciLexer.h"
15 
16 #include "WordList.h"
17 #include "LexAccessor.h"
18 #include "Accessor.h"
19 #include "StyleContext.h"
20 #include "CharacterSet.h"
21 #include "LexerModule.h"
22 
23 using namespace Scintilla;
24 
ColouriseAsyDoc(Sci_PositionU startPos,Sci_Position length,int initStyle,WordList * keywordlists[],Accessor & styler)25 static void ColouriseAsyDoc(Sci_PositionU startPos, Sci_Position 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 
IsAsyCommentStyle(int style)144 static bool IsAsyCommentStyle(int style) {
145 	return style == SCE_ASY_COMMENT;
146 }
147 
148 
isASYidentifier(int ch)149 static inline bool isASYidentifier(int ch) {
150 	return
151       ((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z')) ;
152 }
153 
ParseASYWord(Sci_PositionU pos,Accessor & styler,char * word)154 static int ParseASYWord(Sci_PositionU 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 
IsASYDrawingLine(Sci_Position line,Accessor & styler)169 static bool IsASYDrawingLine(Sci_Position line, Accessor &styler) {
170 	Sci_Position pos = styler.LineStart(line);
171 	Sci_Position eol_pos = styler.LineStart(line + 1) - 1;
172 
173 	Sci_Position 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 
FoldAsyDoc(Sci_PositionU startPos,Sci_Position length,int initStyle,WordList * [],Accessor & styler)188 static void FoldAsyDoc(Sci_PositionU startPos, Sci_Position 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 	Sci_PositionU endPos = startPos + length;
194 	int visibleChars = 0;
195 	Sci_Position 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 (Sci_PositionU 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);
271