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215 lines
5.9 KiB
C++
215 lines
5.9 KiB
C++
// Scintilla source code edit control
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/** @file LexLout.cxx
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** Lexer for the Basser Lout (>= version 3) typesetting language
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**/
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// Copyright 2003 by Kein-Hong Man <mkh@pl.jaring.my>
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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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#ifdef SCI_NAMESPACE
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using namespace Scintilla;
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#endif
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static inline bool IsAWordChar(const int ch) {
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return (ch < 0x80) && (isalpha(ch) || ch == '@' || ch == '_');
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}
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static inline bool IsAnOther(const int ch) {
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return (ch < 0x80) && (ch == '{' || ch == '}' ||
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ch == '!' || ch == '$' || ch == '%' || ch == '&' || ch == '\'' ||
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ch == '(' || ch == ')' || ch == '*' || ch == '+' || ch == ',' ||
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ch == '-' || ch == '.' || ch == '/' || ch == ':' || ch == ';' ||
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ch == '<' || ch == '=' || ch == '>' || ch == '?' || ch == '[' ||
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ch == ']' || ch == '^' || ch == '`' || ch == '|' || ch == '~');
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}
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static void ColouriseLoutDoc(unsigned int startPos, int length, int initStyle,
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WordList *keywordlists[], Accessor &styler) {
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WordList &keywords = *keywordlists[0];
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WordList &keywords2 = *keywordlists[1];
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WordList &keywords3 = *keywordlists[2];
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int visibleChars = 0;
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int firstWordInLine = 0;
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int leadingAtSign = 0;
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StyleContext sc(startPos, length, initStyle, styler);
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for (; sc.More(); sc.Forward()) {
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if (sc.atLineStart && (sc.state == SCE_LOUT_STRING)) {
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// Prevent SCE_LOUT_STRINGEOL from leaking back to previous line
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sc.SetState(SCE_LOUT_STRING);
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}
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// Determine if the current state should terminate.
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if (sc.state == SCE_LOUT_COMMENT) {
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if (sc.atLineEnd) {
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sc.SetState(SCE_LOUT_DEFAULT);
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visibleChars = 0;
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}
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} else if (sc.state == SCE_LOUT_NUMBER) {
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if (!IsADigit(sc.ch) && sc.ch != '.') {
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sc.SetState(SCE_LOUT_DEFAULT);
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}
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} else if (sc.state == SCE_LOUT_STRING) {
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if (sc.ch == '\\') {
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if (sc.chNext == '\"' || sc.chNext == '\\') {
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sc.Forward();
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}
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} else if (sc.ch == '\"') {
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sc.ForwardSetState(SCE_LOUT_DEFAULT);
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} else if (sc.atLineEnd) {
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sc.ChangeState(SCE_LOUT_STRINGEOL);
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sc.ForwardSetState(SCE_LOUT_DEFAULT);
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visibleChars = 0;
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}
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} else if (sc.state == SCE_LOUT_IDENTIFIER) {
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if (!IsAWordChar(sc.ch)) {
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char s[100];
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sc.GetCurrent(s, sizeof(s));
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if (leadingAtSign) {
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if (keywords.InList(s)) {
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sc.ChangeState(SCE_LOUT_WORD);
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} else {
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sc.ChangeState(SCE_LOUT_WORD4);
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}
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} else if (firstWordInLine && keywords3.InList(s)) {
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sc.ChangeState(SCE_LOUT_WORD3);
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}
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sc.SetState(SCE_LOUT_DEFAULT);
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}
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} else if (sc.state == SCE_LOUT_OPERATOR) {
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if (!IsAnOther(sc.ch)) {
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char s[100];
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sc.GetCurrent(s, sizeof(s));
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if (keywords2.InList(s)) {
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sc.ChangeState(SCE_LOUT_WORD2);
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}
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sc.SetState(SCE_LOUT_DEFAULT);
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}
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}
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// Determine if a new state should be entered.
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if (sc.state == SCE_LOUT_DEFAULT) {
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if (sc.ch == '#') {
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sc.SetState(SCE_LOUT_COMMENT);
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} else if (sc.ch == '\"') {
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sc.SetState(SCE_LOUT_STRING);
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} else if (IsADigit(sc.ch) ||
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(sc.ch == '.' && IsADigit(sc.chNext))) {
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sc.SetState(SCE_LOUT_NUMBER);
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} else if (IsAWordChar(sc.ch)) {
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firstWordInLine = (visibleChars == 0);
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leadingAtSign = (sc.ch == '@');
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sc.SetState(SCE_LOUT_IDENTIFIER);
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} else if (IsAnOther(sc.ch)) {
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sc.SetState(SCE_LOUT_OPERATOR);
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}
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}
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if (sc.atLineEnd) {
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// Reset states to begining of colourise so no surprises
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// if different sets of lines lexed.
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visibleChars = 0;
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}
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if (!IsASpace(sc.ch)) {
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visibleChars++;
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}
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}
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sc.Complete();
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}
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static void FoldLoutDoc(unsigned int startPos, int length, int, WordList *[],
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Accessor &styler) {
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unsigned int endPos = startPos + length;
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int visibleChars = 0;
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int 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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bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
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int styleNext = styler.StyleAt(startPos);
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char s[10] = "";
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for (unsigned int i = startPos; i < endPos; 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_LOUT_WORD) {
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if (ch == '@') {
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for (unsigned int j = 0; j < 8; j++) {
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if (!IsAWordChar(styler[i + j])) {
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break;
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}
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s[j] = styler[i + j];
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s[j + 1] = '\0';
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}
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if (strcmp(s, "@Begin") == 0) {
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levelCurrent++;
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} else if (strcmp(s, "@End") == 0) {
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levelCurrent--;
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}
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}
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} else if (style == SCE_LOUT_OPERATOR) {
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if (ch == '{') {
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levelCurrent++;
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} else if (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 && foldCompact) {
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lev |= SC_FOLDLEVELWHITEFLAG;
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}
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if ((levelCurrent > levelPrev) && (visibleChars > 0)) {
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lev |= SC_FOLDLEVELHEADERFLAG;
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}
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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 loutWordLists[] = {
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"Predefined identifiers",
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"Predefined delimiters",
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"Predefined keywords",
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0,
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};
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LexerModule lmLout(SCLEX_LOUT, ColouriseLoutDoc, "lout", FoldLoutDoc, loutWordLists);
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