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