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bgfx/3rdparty/scintilla/lexers/LexLisp.cxx
Branimir Karadžić a510b8f347 Added Scintilla imgui.
2015-06-08 17:07:35 -07:00

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// Scintilla source code edit control
/** @file LexLisp.cxx
** Lexer for Lisp.
** Written by Alexey Yutkin.
**/
// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <ctype.h>
#include "ILexer.h"
#include "Scintilla.h"
#include "SciLexer.h"
#include "WordList.h"
#include "LexAccessor.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "CharacterSet.h"
#include "LexerModule.h"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
#define SCE_LISP_CHARACTER 29
#define SCE_LISP_MACRO 30
#define SCE_LISP_MACRO_DISPATCH 31
static inline bool isLispoperator(char ch) {
if (IsASCII(ch) && isalnum(ch))
return false;
if (ch == '\'' || ch == '`' || ch == '(' || ch == ')' || ch == '[' || ch == ']' || ch == '{' || ch == '}')
return true;
return false;
}
static inline bool isLispwordstart(char ch) {
return IsASCII(ch) && ch != ';' && !isspacechar(ch) && !isLispoperator(ch) &&
ch != '\n' && ch != '\r' && ch != '\"';
}
static void classifyWordLisp(unsigned int start, unsigned int end, WordList &keywords, WordList &keywords_kw, Accessor &styler) {
assert(end >= start);
char s[100];
unsigned int i;
bool digit_flag = true;
for (i = 0; (i < end - start + 1) && (i < 99); i++) {
s[i] = styler[start + i];
s[i + 1] = '\0';
if (!isdigit(s[i]) && (s[i] != '.')) digit_flag = false;
}
char chAttr = SCE_LISP_IDENTIFIER;
if(digit_flag) chAttr = SCE_LISP_NUMBER;
else {
if (keywords.InList(s)) {
chAttr = SCE_LISP_KEYWORD;
} else if (keywords_kw.InList(s)) {
chAttr = SCE_LISP_KEYWORD_KW;
} else if ((s[0] == '*' && s[i-1] == '*') ||
(s[0] == '+' && s[i-1] == '+')) {
chAttr = SCE_LISP_SPECIAL;
}
}
styler.ColourTo(end, chAttr);
return;
}
static void ColouriseLispDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
WordList &keywords = *keywordlists[0];
WordList &keywords_kw = *keywordlists[1];
styler.StartAt(startPos);
int state = initStyle, radix = -1;
char chNext = styler[startPos];
unsigned int lengthDoc = startPos + length;
styler.StartSegment(startPos);
for (unsigned int i = startPos; i < lengthDoc; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (styler.IsLeadByte(ch)) {
chNext = styler.SafeGetCharAt(i + 2);
i += 1;
continue;
}
if (state == SCE_LISP_DEFAULT) {
if (ch == '#') {
styler.ColourTo(i - 1, state);
radix = -1;
state = SCE_LISP_MACRO_DISPATCH;
} else if (ch == ':' && isLispwordstart(chNext)) {
styler.ColourTo(i - 1, state);
state = SCE_LISP_SYMBOL;
} else if (isLispwordstart(ch)) {
styler.ColourTo(i - 1, state);
state = SCE_LISP_IDENTIFIER;
}
else if (ch == ';') {
styler.ColourTo(i - 1, state);
state = SCE_LISP_COMMENT;
}
else if (isLispoperator(ch) || ch=='\'') {
styler.ColourTo(i - 1, state);
styler.ColourTo(i, SCE_LISP_OPERATOR);
if (ch=='\'' && isLispwordstart(chNext)) {
state = SCE_LISP_SYMBOL;
}
}
else if (ch == '\"') {
styler.ColourTo(i - 1, state);
state = SCE_LISP_STRING;
}
} else if (state == SCE_LISP_IDENTIFIER || state == SCE_LISP_SYMBOL) {
if (!isLispwordstart(ch)) {
if (state == SCE_LISP_IDENTIFIER) {
classifyWordLisp(styler.GetStartSegment(), i - 1, keywords, keywords_kw, styler);
} else {
styler.ColourTo(i - 1, state);
}
state = SCE_LISP_DEFAULT;
} /*else*/
if (isLispoperator(ch) || ch=='\'') {
styler.ColourTo(i - 1, state);
styler.ColourTo(i, SCE_LISP_OPERATOR);
if (ch=='\'' && isLispwordstart(chNext)) {
state = SCE_LISP_SYMBOL;
}
}
} else if (state == SCE_LISP_MACRO_DISPATCH) {
if (!(IsASCII(ch) && isdigit(ch))) {
if (ch != 'r' && ch != 'R' && (i - styler.GetStartSegment()) > 1) {
state = SCE_LISP_DEFAULT;
} else {
switch (ch) {
case '|': state = SCE_LISP_MULTI_COMMENT; break;
case 'o':
case 'O': radix = 8; state = SCE_LISP_MACRO; break;
case 'x':
case 'X': radix = 16; state = SCE_LISP_MACRO; break;
case 'b':
case 'B': radix = 2; state = SCE_LISP_MACRO; break;
case '\\': state = SCE_LISP_CHARACTER; break;
case ':':
case '-':
case '+': state = SCE_LISP_MACRO; break;
case '\'': if (isLispwordstart(chNext)) {
state = SCE_LISP_SPECIAL;
} else {
styler.ColourTo(i - 1, SCE_LISP_DEFAULT);
styler.ColourTo(i, SCE_LISP_OPERATOR);
state = SCE_LISP_DEFAULT;
}
break;
default: if (isLispoperator(ch)) {
styler.ColourTo(i - 1, SCE_LISP_DEFAULT);
styler.ColourTo(i, SCE_LISP_OPERATOR);
}
state = SCE_LISP_DEFAULT;
break;
}
}
}
} else if (state == SCE_LISP_MACRO) {
if (isLispwordstart(ch) && (radix == -1 || IsADigit(ch, radix))) {
state = SCE_LISP_SPECIAL;
} else {
state = SCE_LISP_DEFAULT;
}
} else if (state == SCE_LISP_CHARACTER) {
if (isLispoperator(ch)) {
styler.ColourTo(i, SCE_LISP_SPECIAL);
state = SCE_LISP_DEFAULT;
} else if (isLispwordstart(ch)) {
styler.ColourTo(i, SCE_LISP_SPECIAL);
state = SCE_LISP_SPECIAL;
} else {
state = SCE_LISP_DEFAULT;
}
} else if (state == SCE_LISP_SPECIAL) {
if (!isLispwordstart(ch) || (radix != -1 && !IsADigit(ch, radix))) {
styler.ColourTo(i - 1, state);
state = SCE_LISP_DEFAULT;
}
if (isLispoperator(ch) || ch=='\'') {
styler.ColourTo(i - 1, state);
styler.ColourTo(i, SCE_LISP_OPERATOR);
if (ch=='\'' && isLispwordstart(chNext)) {
state = SCE_LISP_SYMBOL;
}
}
} else {
if (state == SCE_LISP_COMMENT) {
if (atEOL) {
styler.ColourTo(i - 1, state);
state = SCE_LISP_DEFAULT;
}
} else if (state == SCE_LISP_MULTI_COMMENT) {
if (ch == '|' && chNext == '#') {
i++;
chNext = styler.SafeGetCharAt(i + 1);
styler.ColourTo(i, state);
state = SCE_LISP_DEFAULT;
}
} else if (state == SCE_LISP_STRING) {
if (ch == '\\') {
if (chNext == '\"' || chNext == '\'' || chNext == '\\') {
i++;
chNext = styler.SafeGetCharAt(i + 1);
}
} else if (ch == '\"') {
styler.ColourTo(i, state);
state = SCE_LISP_DEFAULT;
}
}
}
}
styler.ColourTo(lengthDoc - 1, state);
}
static void FoldLispDoc(unsigned int startPos, int length, int /* initStyle */, WordList *[],
Accessor &styler) {
unsigned int lengthDoc = startPos + length;
int visibleChars = 0;
int lineCurrent = styler.GetLine(startPos);
int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
int levelCurrent = levelPrev;
char chNext = styler[startPos];
int styleNext = styler.StyleAt(startPos);
for (unsigned int i = startPos; i < lengthDoc; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
int style = styleNext;
styleNext = styler.StyleAt(i + 1);
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (style == SCE_LISP_OPERATOR) {
if (ch == '(' || ch == '[' || ch == '{') {
levelCurrent++;
} else if (ch == ')' || ch == ']' || ch == '}') {
levelCurrent--;
}
}
if (atEOL) {
int lev = levelPrev;
if (visibleChars == 0)
lev |= SC_FOLDLEVELWHITEFLAG;
if ((levelCurrent > levelPrev) && (visibleChars > 0))
lev |= SC_FOLDLEVELHEADERFLAG;
if (lev != styler.LevelAt(lineCurrent)) {
styler.SetLevel(lineCurrent, lev);
}
lineCurrent++;
levelPrev = levelCurrent;
visibleChars = 0;
}
if (!isspacechar(ch))
visibleChars++;
}
// Fill in the real level of the next line, keeping the current flags as they will be filled in later
int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
styler.SetLevel(lineCurrent, levelPrev | flagsNext);
}
static const char * const lispWordListDesc[] = {
"Functions and special operators",
"Keywords",
0
};
LexerModule lmLISP(SCLEX_LISP, ColouriseLispDoc, "lisp", FoldLispDoc, lispWordListDesc);
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