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65ec6247 RD |
1 | // Scintilla source code edit control |
2 | /** @file LexVB.cxx | |
3 | ** Lexer for Visual Basic and VBScript. | |
4 | **/ | |
1e9bafca | 5 | // Copyright 1998-2005 by Neil Hodgson <neilh@scintilla.org> |
f6bcfd97 BP |
6 | // The License.txt file describes the conditions under which this software may be distributed. |
7 | ||
65ec6247 RD |
8 | #include <stdlib.h> |
9 | #include <string.h> | |
10 | #include <ctype.h> | |
11 | #include <stdio.h> | |
12 | #include <stdarg.h> | |
f6bcfd97 BP |
13 | |
14 | #include "Platform.h" | |
15 | ||
16 | #include "PropSet.h" | |
17 | #include "Accessor.h" | |
1a2fb4cd | 18 | #include "StyleContext.h" |
f6bcfd97 BP |
19 | #include "KeyWords.h" |
20 | #include "Scintilla.h" | |
21 | #include "SciLexer.h" | |
22 | ||
1e9bafca RD |
23 | // Internal state, highlighted as number |
24 | #define SCE_B_FILENUMBER SCE_B_DEFAULT+100 | |
25 | ||
26 | ||
1a2fb4cd | 27 | static bool IsVBComment(Accessor &styler, int pos, int len) { |
1e9bafca | 28 | return len > 0 && styler[pos] == '\''; |
1a2fb4cd | 29 | } |
f6bcfd97 | 30 | |
8e54aaed | 31 | static inline bool IsTypeCharacter(int ch) { |
1a2fb4cd | 32 | return ch == '%' || ch == '&' || ch == '@' || ch == '!' || ch == '#' || ch == '$'; |
f6bcfd97 BP |
33 | } |
34 | ||
8e54aaed RD |
35 | // Extended to accept accented characters |
36 | static inline bool IsAWordChar(int ch) { | |
37 | return ch >= 0x80 || | |
38 | (isalnum(ch) || ch == '.' || ch == '_'); | |
1a2fb4cd RD |
39 | } |
40 | ||
8e54aaed RD |
41 | static inline bool IsAWordStart(int ch) { |
42 | return ch >= 0x80 || | |
1e9bafca | 43 | (isalpha(ch) || ch == '_'); |
1a2fb4cd RD |
44 | } |
45 | ||
1e9bafca RD |
46 | static inline bool IsANumberChar(int ch) { |
47 | // Not exactly following number definition (several dots are seen as OK, etc.) | |
48 | // but probably enough in most cases. | |
9e730a78 | 49 | return (ch < 0x80) && |
1e9bafca RD |
50 | (isdigit(ch) || toupper(ch) == 'E' || |
51 | ch == '.' || ch == '-' || ch == '+'); | |
65ec6247 RD |
52 | } |
53 | ||
f6bcfd97 | 54 | static void ColouriseVBDoc(unsigned int startPos, int length, int initStyle, |
1a2fb4cd | 55 | WordList *keywordlists[], Accessor &styler, bool vbScriptSyntax) { |
f6bcfd97 BP |
56 | |
57 | WordList &keywords = *keywordlists[0]; | |
8e54aaed RD |
58 | WordList &keywords2 = *keywordlists[1]; |
59 | WordList &keywords3 = *keywordlists[2]; | |
60 | WordList &keywords4 = *keywordlists[3]; | |
65ec6247 | 61 | |
f6bcfd97 BP |
62 | styler.StartAt(startPos); |
63 | ||
d134f170 | 64 | int visibleChars = 0; |
1e9bafca RD |
65 | int fileNbDigits = 0; |
66 | ||
67 | // Do not leak onto next line | |
68 | if (initStyle == SCE_B_STRINGEOL || initStyle == SCE_B_COMMENT || initStyle == SCE_B_PREPROCESSOR) { | |
69 | initStyle = SCE_B_DEFAULT; | |
70 | } | |
9e730a78 | 71 | |
1a2fb4cd RD |
72 | StyleContext sc(startPos, length, initStyle, styler); |
73 | ||
74 | for (; sc.More(); sc.Forward()) { | |
75 | ||
76 | if (sc.state == SCE_B_OPERATOR) { | |
77 | sc.SetState(SCE_B_DEFAULT); | |
8e54aaed | 78 | } else if (sc.state == SCE_B_IDENTIFIER) { |
1a2fb4cd | 79 | if (!IsAWordChar(sc.ch)) { |
8e54aaed RD |
80 | // In Basic (except VBScript), a variable name or a function name |
81 | // can end with a special character indicating the type of the value | |
82 | // held or returned. | |
83 | bool skipType = false; | |
84 | if (!vbScriptSyntax && IsTypeCharacter(sc.ch)) { | |
85 | sc.Forward(); // Skip it | |
86 | skipType = true; | |
87 | } | |
88 | if (sc.ch == ']') { | |
89 | sc.Forward(); | |
90 | } | |
91 | char s[100]; | |
92 | sc.GetCurrentLowered(s, sizeof(s)); | |
93 | if (skipType) { | |
94 | s[strlen(s) - 1] = '\0'; | |
95 | } | |
96 | if (strcmp(s, "rem") == 0) { | |
97 | sc.ChangeState(SCE_B_COMMENT); | |
98 | } else { | |
1a2fb4cd | 99 | if (keywords.InList(s)) { |
8e54aaed RD |
100 | sc.ChangeState(SCE_B_KEYWORD); |
101 | } else if (keywords2.InList(s)) { | |
102 | sc.ChangeState(SCE_B_KEYWORD2); | |
103 | } else if (keywords3.InList(s)) { | |
104 | sc.ChangeState(SCE_B_KEYWORD3); | |
105 | } else if (keywords4.InList(s)) { | |
106 | sc.ChangeState(SCE_B_KEYWORD4); | |
107 | } // Else, it is really an identifier... | |
108 | sc.SetState(SCE_B_DEFAULT); | |
f6bcfd97 BP |
109 | } |
110 | } | |
1a2fb4cd | 111 | } else if (sc.state == SCE_B_NUMBER) { |
1e9bafca RD |
112 | // We stop the number definition on non-numerical non-dot non-eE non-sign char |
113 | // Also accepts A-F for hex. numbers | |
114 | if (!IsANumberChar(sc.ch) && !(tolower(sc.ch) >= 'a' && tolower(sc.ch) <= 'f')) { | |
1a2fb4cd RD |
115 | sc.SetState(SCE_B_DEFAULT); |
116 | } | |
117 | } else if (sc.state == SCE_B_STRING) { | |
9e730a78 | 118 | // VB doubles quotes to preserve them, so just end this string |
1a2fb4cd RD |
119 | // state now as a following quote will start again |
120 | if (sc.ch == '\"') { | |
121 | if (tolower(sc.chNext) == 'c') { | |
122 | sc.Forward(); | |
f6bcfd97 | 123 | } |
1a2fb4cd | 124 | sc.ForwardSetState(SCE_B_DEFAULT); |
8e54aaed RD |
125 | } else if (sc.atLineEnd) { |
126 | sc.ChangeState(SCE_B_STRINGEOL); | |
127 | sc.ForwardSetState(SCE_B_DEFAULT); | |
1a2fb4cd RD |
128 | } |
129 | } else if (sc.state == SCE_B_COMMENT) { | |
130 | if (sc.atLineEnd) { | |
1e9bafca | 131 | sc.ForwardSetState(SCE_B_DEFAULT); |
1a2fb4cd RD |
132 | } |
133 | } else if (sc.state == SCE_B_PREPROCESSOR) { | |
134 | if (sc.atLineEnd) { | |
1e9bafca RD |
135 | sc.ForwardSetState(SCE_B_DEFAULT); |
136 | } | |
137 | } else if (sc.state == SCE_B_FILENUMBER) { | |
138 | if (IsADigit(sc.ch)) { | |
139 | fileNbDigits++; | |
140 | if (fileNbDigits > 3) { | |
141 | sc.ChangeState(SCE_B_DATE); | |
142 | } | |
143 | } else if (sc.ch == '\r' || sc.ch == '\n' || sc.ch == ',') { | |
144 | // Regular uses: Close #1; Put #1, ...; Get #1, ... etc. | |
145 | // Too bad if date is format #27, Oct, 2003# or something like that... | |
146 | // Use regular number state | |
147 | sc.ChangeState(SCE_B_NUMBER); | |
1a2fb4cd | 148 | sc.SetState(SCE_B_DEFAULT); |
1e9bafca RD |
149 | } else if (sc.ch == '#') { |
150 | sc.ChangeState(SCE_B_DATE); | |
151 | sc.ForwardSetState(SCE_B_DEFAULT); | |
152 | } else { | |
153 | sc.ChangeState(SCE_B_DATE); | |
154 | } | |
155 | if (sc.state != SCE_B_FILENUMBER) { | |
156 | fileNbDigits = 0; | |
f6bcfd97 | 157 | } |
1a2fb4cd | 158 | } else if (sc.state == SCE_B_DATE) { |
1e9bafca RD |
159 | if (sc.atLineEnd) { |
160 | sc.ChangeState(SCE_B_STRINGEOL); | |
161 | sc.ForwardSetState(SCE_B_DEFAULT); | |
162 | } else if (sc.ch == '#') { | |
1a2fb4cd RD |
163 | sc.ForwardSetState(SCE_B_DEFAULT); |
164 | } | |
165 | } | |
9e730a78 | 166 | |
1a2fb4cd RD |
167 | if (sc.state == SCE_B_DEFAULT) { |
168 | if (sc.ch == '\'') { | |
169 | sc.SetState(SCE_B_COMMENT); | |
170 | } else if (sc.ch == '\"') { | |
171 | sc.SetState(SCE_B_STRING); | |
172 | } else if (sc.ch == '#' && visibleChars == 0) { | |
173 | // Preprocessor commands are alone on their line | |
174 | sc.SetState(SCE_B_PREPROCESSOR); | |
175 | } else if (sc.ch == '#') { | |
1e9bafca RD |
176 | // It can be a date literal, ending with #, or a file number, from 1 to 511 |
177 | // The date literal depends on the locale, so anything can go between #'s. | |
178 | // Can be #January 1, 1993# or #1 Jan 93# or #05/11/2003#, etc. | |
179 | // So we set the FILENUMBER state, and switch to DATE if it isn't a file number | |
180 | sc.SetState(SCE_B_FILENUMBER); | |
1a2fb4cd | 181 | } else if (sc.ch == '&' && tolower(sc.chNext) == 'h') { |
1e9bafca | 182 | // Hexadecimal number |
1a2fb4cd | 183 | sc.SetState(SCE_B_NUMBER); |
1e9bafca | 184 | sc.Forward(); |
1a2fb4cd | 185 | } else if (sc.ch == '&' && tolower(sc.chNext) == 'o') { |
1e9bafca | 186 | // Octal number |
1a2fb4cd | 187 | sc.SetState(SCE_B_NUMBER); |
1e9bafca | 188 | sc.Forward(); |
1a2fb4cd RD |
189 | } else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) { |
190 | sc.SetState(SCE_B_NUMBER); | |
191 | } else if (IsAWordStart(sc.ch) || (sc.ch == '[')) { | |
8e54aaed | 192 | sc.SetState(SCE_B_IDENTIFIER); |
1e9bafca | 193 | } else if (isoperator(static_cast<char>(sc.ch)) || (sc.ch == '\\')) { // Integer division |
1a2fb4cd | 194 | sc.SetState(SCE_B_OPERATOR); |
f6bcfd97 BP |
195 | } |
196 | } | |
9e730a78 | 197 | |
1a2fb4cd RD |
198 | if (sc.atLineEnd) { |
199 | visibleChars = 0; | |
200 | } | |
201 | if (!IsASpace(sc.ch)) { | |
202 | visibleChars++; | |
203 | } | |
f6bcfd97 | 204 | } |
1a2fb4cd | 205 | sc.Complete(); |
f6bcfd97 BP |
206 | } |
207 | ||
1a2fb4cd | 208 | static void FoldVBDoc(unsigned int startPos, int length, int, |
65ec6247 | 209 | WordList *[], Accessor &styler) { |
1a2fb4cd | 210 | int endPos = startPos + length; |
65ec6247 RD |
211 | |
212 | // Backtrack to previous line in case need to fix its fold status | |
213 | int lineCurrent = styler.GetLine(startPos); | |
214 | if (startPos > 0) { | |
215 | if (lineCurrent > 0) { | |
216 | lineCurrent--; | |
217 | startPos = styler.LineStart(lineCurrent); | |
65ec6247 RD |
218 | } |
219 | } | |
65ec6247 RD |
220 | int spaceFlags = 0; |
221 | int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, IsVBComment); | |
65ec6247 | 222 | char chNext = styler[startPos]; |
1a2fb4cd | 223 | for (int i = startPos; i < endPos; i++) { |
65ec6247 RD |
224 | char ch = chNext; |
225 | chNext = styler.SafeGetCharAt(i + 1); | |
65ec6247 | 226 | |
1a2fb4cd | 227 | if ((ch == '\r' && chNext != '\n') || (ch == '\n') || (i == endPos)) { |
65ec6247 RD |
228 | int lev = indentCurrent; |
229 | int indentNext = styler.IndentAmount(lineCurrent + 1, &spaceFlags, IsVBComment); | |
65ec6247 RD |
230 | if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG)) { |
231 | // Only non whitespace lines can be headers | |
232 | if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK)) { | |
233 | lev |= SC_FOLDLEVELHEADERFLAG; | |
234 | } else if (indentNext & SC_FOLDLEVELWHITEFLAG) { | |
235 | // Line after is blank so check the next - maybe should continue further? | |
236 | int spaceFlags2 = 0; | |
237 | int indentNext2 = styler.IndentAmount(lineCurrent + 2, &spaceFlags2, IsVBComment); | |
238 | if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext2 & SC_FOLDLEVELNUMBERMASK)) { | |
239 | lev |= SC_FOLDLEVELHEADERFLAG; | |
240 | } | |
241 | } | |
242 | } | |
243 | indentCurrent = indentNext; | |
244 | styler.SetLevel(lineCurrent, lev); | |
245 | lineCurrent++; | |
246 | } | |
247 | } | |
248 | } | |
249 | ||
1a2fb4cd RD |
250 | static void ColouriseVBNetDoc(unsigned int startPos, int length, int initStyle, |
251 | WordList *keywordlists[], Accessor &styler) { | |
252 | ColouriseVBDoc(startPos, length, initStyle, keywordlists, styler, false); | |
253 | } | |
254 | ||
255 | static void ColouriseVBScriptDoc(unsigned int startPos, int length, int initStyle, | |
256 | WordList *keywordlists[], Accessor &styler) { | |
257 | ColouriseVBDoc(startPos, length, initStyle, keywordlists, styler, true); | |
258 | } | |
259 | ||
9e730a78 RD |
260 | static const char * const vbWordListDesc[] = { |
261 | "Keywords", | |
8e54aaed RD |
262 | "user1", |
263 | "user2", | |
264 | "user3", | |
9e730a78 RD |
265 | 0 |
266 | }; | |
267 | ||
268 | LexerModule lmVB(SCLEX_VB, ColouriseVBNetDoc, "vb", FoldVBDoc, vbWordListDesc); | |
269 | LexerModule lmVBScript(SCLEX_VBSCRIPT, ColouriseVBScriptDoc, "vbscript", FoldVBDoc, vbWordListDesc); | |
1a2fb4cd | 270 |