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904 lines
38 KiB
904 lines
38 KiB
// Scintilla source code edit control
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/** @file LexTADS3.cxx
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** Lexer for TADS3.
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**/
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// Copyright 1998-2006 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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/*
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* TADS3 is a language designed by Michael J. Roberts for the writing of text
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* based games. TADS comes from Text Adventure Development System. It has good
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* support for the processing and outputting of formatted text and much of a
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* TADS program listing consists of strings.
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*
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* TADS has two types of strings, those enclosed in single quotes (') and those
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* enclosed in double quotes ("). These strings have different symantics and
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* can be given different highlighting if desired.
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*
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* There can be embedded within both types of strings html tags
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* ( <tag key=value> ), library directives ( <.directive> ), and message
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* parameters ( {The doctor's/his} ).
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*
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* Double quoted strings can also contain interpolated expressions
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* ( << rug.moved ? ' and a hole in the floor. ' : nil >> ). These expressions
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* may themselves contain single or double quoted strings, although the double
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* quoted strings may not contain interpolated expressions.
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*
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* These embedded constructs influence the output and formatting and are an
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* important part of a program and require highlighting.
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*
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* LINKS
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* http://www.tads.org/
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*/
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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 const int T3_SINGLE_QUOTE = 1;
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static const int T3_INT_EXPRESSION = 2;
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static const int T3_INT_EXPRESSION_IN_TAG = 4;
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static const int T3_HTML_SQUOTE = 8;
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static inline bool IsEOL(const int ch, const int chNext) {
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return (ch == '\r' && chNext != '\n') || (ch == '\n');
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}
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/*
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* Test the current character to see if it's the START of an EOL sequence;
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* if so, skip ahead to the last character of the sequence and return true,
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* and if not just return false. There are a few places where we want to
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* check to see if a newline sequence occurs at a particular point, but
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* where a caller expects a subroutine to stop only upon reaching the END
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* of a newline sequence (in particular, CR-LF on Windows). That's why
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* IsEOL() above only returns true on CR if the CR isn't followed by an LF
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* - it doesn't want to admit that there's a newline until reaching the END
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* of the sequence. We meet both needs by saying that there's a newline
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* when we see the CR in a CR-LF, but skipping the CR before returning so
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* that the caller's caller will see that we've stopped at the LF.
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*/
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static inline bool IsEOLSkip(StyleContext &sc)
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{
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/* test for CR-LF */
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if (sc.ch == '\r' && sc.chNext == '\n')
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{
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/* got CR-LF - skip the CR and indicate that we're at a newline */
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sc.Forward();
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return true;
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}
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/*
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* in other cases, we have at most a 1-character newline, so do the
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* normal IsEOL test
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*/
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return IsEOL(sc.ch, sc.chNext);
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}
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static inline bool IsATADS3Operator(const int ch) {
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return 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 == '~';
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}
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static inline bool IsAWordChar(const int ch) {
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return isalnum(ch) || ch == '_';
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}
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static inline bool IsAWordStart(const int ch) {
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return isalpha(ch) || ch == '_';
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}
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static inline bool IsAHexDigit(const int ch) {
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int lch = tolower(ch);
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return isdigit(lch) || lch == 'a' || lch == 'b' || lch == 'c'
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|| lch == 'd' || lch == 'e' || lch == 'f';
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}
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static inline bool IsAnHTMLChar(int ch) {
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return isalnum(ch) || ch == '-' || ch == '_' || ch == '.';
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}
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static inline bool IsADirectiveChar(int ch) {
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return isalnum(ch) || isspace(ch) || ch == '-' || ch == '/';
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}
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static inline bool IsANumberStart(StyleContext &sc) {
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return isdigit(sc.ch)
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|| (!isdigit(sc.chPrev) && sc.ch == '.' && isdigit(sc.chNext));
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}
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inline static void ColouriseTADS3Operator(StyleContext &sc) {
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int initState = sc.state;
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int c = sc.ch;
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sc.SetState(c == '{' || c == '}' ? SCE_T3_BRACE : SCE_T3_OPERATOR);
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sc.ForwardSetState(initState);
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}
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static void ColouriseTADSHTMLString(StyleContext &sc, int &lineState) {
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int endState = sc.state;
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int chQuote = sc.ch;
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int chString = (lineState & T3_SINGLE_QUOTE) ? '\'' : '"';
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if (endState == SCE_T3_HTML_STRING) {
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if (lineState&T3_SINGLE_QUOTE) {
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endState = SCE_T3_S_STRING;
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chString = '\'';
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} else if (lineState&T3_INT_EXPRESSION) {
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endState = SCE_T3_X_STRING;
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chString = '"';
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} else {
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endState = SCE_T3_HTML_DEFAULT;
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chString = '"';
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}
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chQuote = (lineState & T3_HTML_SQUOTE) ? '\'' : '"';
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} else {
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sc.SetState(SCE_T3_HTML_STRING);
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sc.Forward();
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}
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if (chQuote == '"')
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lineState &= ~T3_HTML_SQUOTE;
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else
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lineState |= T3_HTML_SQUOTE;
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while (sc.More()) {
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if (IsEOL(sc.ch, sc.chNext)) {
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return;
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}
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if (sc.ch == chQuote) {
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sc.ForwardSetState(endState);
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return;
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}
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if (sc.Match('\\', static_cast<char>(chQuote))) {
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sc.Forward(2);
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sc.SetState(endState);
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return;
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}
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if (sc.ch == chString) {
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sc.SetState(SCE_T3_DEFAULT);
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return;
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}
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if (sc.Match('<', '<')) {
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lineState |= T3_INT_EXPRESSION | T3_INT_EXPRESSION_IN_TAG;
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sc.SetState(SCE_T3_X_DEFAULT);
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sc.Forward(2);
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return;
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}
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if (sc.Match('\\', static_cast<char>(chQuote))
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|| sc.Match('\\', static_cast<char>(chString))
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|| sc.Match('\\', '\\')) {
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sc.Forward(2);
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} else {
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sc.Forward();
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}
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}
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}
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static void ColouriseTADS3HTMLTagStart(StyleContext &sc) {
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sc.SetState(SCE_T3_HTML_TAG);
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sc.Forward();
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if (sc.ch == '/') {
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sc.Forward();
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}
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while (IsAnHTMLChar(sc.ch)) {
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sc.Forward();
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}
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}
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static void ColouriseTADS3HTMLTag(StyleContext &sc, int &lineState) {
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int endState = sc.state;
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int chQuote = '"';
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int chString = '\'';
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switch (endState) {
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case SCE_T3_S_STRING:
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ColouriseTADS3HTMLTagStart(sc);
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sc.SetState(SCE_T3_HTML_DEFAULT);
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chQuote = '\'';
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chString = '"';
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break;
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case SCE_T3_D_STRING:
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case SCE_T3_X_STRING:
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ColouriseTADS3HTMLTagStart(sc);
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sc.SetState(SCE_T3_HTML_DEFAULT);
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break;
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case SCE_T3_HTML_DEFAULT:
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if (lineState&T3_SINGLE_QUOTE) {
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endState = SCE_T3_S_STRING;
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chQuote = '\'';
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chString = '"';
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} else if (lineState&T3_INT_EXPRESSION) {
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endState = SCE_T3_X_STRING;
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} else {
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endState = SCE_T3_D_STRING;
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}
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break;
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}
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while (sc.More()) {
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if (IsEOL(sc.ch, sc.chNext)) {
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return;
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}
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if (sc.Match('/', '>')) {
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sc.SetState(SCE_T3_HTML_TAG);
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sc.Forward(2);
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sc.SetState(endState);
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return;
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}
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if (sc.ch == '>') {
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sc.SetState(SCE_T3_HTML_TAG);
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sc.ForwardSetState(endState);
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return;
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}
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if (sc.ch == chQuote) {
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sc.SetState(endState);
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return;
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}
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if (sc.Match('\\', static_cast<char>(chQuote))) {
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sc.Forward();
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ColouriseTADSHTMLString(sc, lineState);
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if (sc.state == SCE_T3_X_DEFAULT)
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break;
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} else if (sc.ch == chString) {
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ColouriseTADSHTMLString(sc, lineState);
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} else if (sc.ch == '=') {
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ColouriseTADS3Operator(sc);
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} else {
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sc.Forward();
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}
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}
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}
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static void ColouriseTADS3Keyword(StyleContext &sc,
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WordList *keywordlists[], unsigned int endPos) {
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char s[250];
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WordList &keywords = *keywordlists[0];
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WordList &userwords1 = *keywordlists[1];
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WordList &userwords2 = *keywordlists[2];
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WordList &userwords3 = *keywordlists[3];
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int initState = sc.state;
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sc.SetState(SCE_T3_IDENTIFIER);
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while (sc.More() && (IsAWordChar(sc.ch))) {
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sc.Forward();
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}
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sc.GetCurrent(s, sizeof(s));
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if ( strcmp(s, "is") == 0 || strcmp(s, "not") == 0) {
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// have to find if "in" is next
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int n = 1;
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while (n + sc.currentPos < endPos && IsASpaceOrTab(sc.GetRelative(n)))
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n++;
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if (sc.GetRelative(n) == 'i' && sc.GetRelative(n+1) == 'n') {
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sc.Forward(n+2);
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sc.ChangeState(SCE_T3_KEYWORD);
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}
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} else if (keywords.InList(s)) {
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sc.ChangeState(SCE_T3_KEYWORD);
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} else if (userwords3.InList(s)) {
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sc.ChangeState(SCE_T3_USER3);
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} else if (userwords2.InList(s)) {
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sc.ChangeState(SCE_T3_USER2);
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} else if (userwords1.InList(s)) {
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sc.ChangeState(SCE_T3_USER1);
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}
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sc.SetState(initState);
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}
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static void ColouriseTADS3MsgParam(StyleContext &sc, int &lineState) {
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int endState = sc.state;
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int chQuote = '"';
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switch (endState) {
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case SCE_T3_S_STRING:
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sc.SetState(SCE_T3_MSG_PARAM);
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sc.Forward();
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chQuote = '\'';
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break;
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case SCE_T3_D_STRING:
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case SCE_T3_X_STRING:
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sc.SetState(SCE_T3_MSG_PARAM);
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sc.Forward();
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break;
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case SCE_T3_MSG_PARAM:
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if (lineState&T3_SINGLE_QUOTE) {
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endState = SCE_T3_S_STRING;
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chQuote = '\'';
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} else if (lineState&T3_INT_EXPRESSION) {
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endState = SCE_T3_X_STRING;
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} else {
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endState = SCE_T3_D_STRING;
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}
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break;
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}
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while (sc.More() && sc.ch != '}' && sc.ch != chQuote) {
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if (IsEOL(sc.ch, sc.chNext)) {
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return;
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}
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if (sc.ch == '\\') {
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sc.Forward();
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}
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sc.Forward();
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}
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if (sc.ch == chQuote) {
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sc.SetState(endState);
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} else {
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sc.ForwardSetState(endState);
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}
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}
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static void ColouriseTADS3LibDirective(StyleContext &sc, int &lineState) {
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int initState = sc.state;
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int chQuote = '"';
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switch (initState) {
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case SCE_T3_S_STRING:
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sc.SetState(SCE_T3_LIB_DIRECTIVE);
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sc.Forward(2);
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chQuote = '\'';
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break;
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case SCE_T3_D_STRING:
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sc.SetState(SCE_T3_LIB_DIRECTIVE);
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sc.Forward(2);
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break;
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case SCE_T3_LIB_DIRECTIVE:
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if (lineState&T3_SINGLE_QUOTE) {
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initState = SCE_T3_S_STRING;
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chQuote = '\'';
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} else {
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initState = SCE_T3_D_STRING;
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}
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break;
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}
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while (sc.More() && IsADirectiveChar(sc.ch)) {
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if (IsEOL(sc.ch, sc.chNext)) {
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return;
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}
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sc.Forward();
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};
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if (sc.ch == '>' || !sc.More()) {
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sc.ForwardSetState(initState);
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} else if (sc.ch == chQuote) {
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sc.SetState(initState);
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} else {
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sc.ChangeState(initState);
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sc.Forward();
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}
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}
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static void ColouriseTADS3String(StyleContext &sc, int &lineState) {
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int chQuote = sc.ch;
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int endState = sc.state;
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switch (sc.state) {
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case SCE_T3_DEFAULT:
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case SCE_T3_X_DEFAULT:
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if (chQuote == '"') {
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if (sc.state == SCE_T3_DEFAULT) {
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sc.SetState(SCE_T3_D_STRING);
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} else {
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sc.SetState(SCE_T3_X_STRING);
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}
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lineState &= ~T3_SINGLE_QUOTE;
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} else {
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sc.SetState(SCE_T3_S_STRING);
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lineState |= T3_SINGLE_QUOTE;
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}
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sc.Forward();
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break;
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case SCE_T3_S_STRING:
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chQuote = '\'';
|
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endState = lineState&T3_INT_EXPRESSION ?
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SCE_T3_X_DEFAULT : SCE_T3_DEFAULT;
|
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break;
|
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case SCE_T3_D_STRING:
|
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chQuote = '"';
|
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endState = SCE_T3_DEFAULT;
|
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break;
|
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case SCE_T3_X_STRING:
|
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chQuote = '"';
|
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endState = SCE_T3_X_DEFAULT;
|
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break;
|
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}
|
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while (sc.More()) {
|
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if (IsEOL(sc.ch, sc.chNext)) {
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return;
|
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}
|
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if (sc.ch == chQuote) {
|
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sc.ForwardSetState(endState);
|
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return;
|
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}
|
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if (sc.state == SCE_T3_D_STRING && sc.Match('<', '<')) {
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lineState |= T3_INT_EXPRESSION;
|
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sc.SetState(SCE_T3_X_DEFAULT);
|
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sc.Forward(2);
|
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return;
|
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}
|
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if (sc.Match('\\', static_cast<char>(chQuote))
|
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|| sc.Match('\\', '\\')) {
|
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sc.Forward(2);
|
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} else if (sc.ch == '{') {
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ColouriseTADS3MsgParam(sc, lineState);
|
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} else if (sc.Match('<', '.')) {
|
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ColouriseTADS3LibDirective(sc, lineState);
|
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} else if (sc.ch == '<') {
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ColouriseTADS3HTMLTag(sc, lineState);
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if (sc.state == SCE_T3_X_DEFAULT)
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return;
|
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} else {
|
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sc.Forward();
|
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}
|
|
}
|
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}
|
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static void ColouriseTADS3Comment(StyleContext &sc, int endState) {
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sc.SetState(SCE_T3_BLOCK_COMMENT);
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while (sc.More()) {
|
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if (IsEOL(sc.ch, sc.chNext)) {
|
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return;
|
|
}
|
|
if (sc.Match('*', '/')) {
|
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sc.Forward(2);
|
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sc.SetState(endState);
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return;
|
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}
|
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sc.Forward();
|
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}
|
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}
|
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|
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static void ColouriseToEndOfLine(StyleContext &sc, int initState, int endState) {
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sc.SetState(initState);
|
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while (sc.More()) {
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if (sc.ch == '\\') {
|
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sc.Forward();
|
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if (IsEOLSkip(sc)) {
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return;
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}
|
|
}
|
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if (IsEOL(sc.ch, sc.chNext)) {
|
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sc.SetState(endState);
|
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return;
|
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}
|
|
sc.Forward();
|
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}
|
|
}
|
|
|
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static void ColouriseTADS3Number(StyleContext &sc) {
|
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int endState = sc.state;
|
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bool inHexNumber = false;
|
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bool seenE = false;
|
|
bool seenDot = sc.ch == '.';
|
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sc.SetState(SCE_T3_NUMBER);
|
|
if (sc.More()) {
|
|
sc.Forward();
|
|
}
|
|
if (sc.chPrev == '0' && tolower(sc.ch) == 'x') {
|
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inHexNumber = true;
|
|
sc.Forward();
|
|
}
|
|
while (sc.More()) {
|
|
if (inHexNumber) {
|
|
if (!IsAHexDigit(sc.ch)) {
|
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break;
|
|
}
|
|
} else if (!isdigit(sc.ch)) {
|
|
if (!seenE && tolower(sc.ch) == 'e') {
|
|
seenE = true;
|
|
seenDot = true;
|
|
if (sc.chNext == '+' || sc.chNext == '-') {
|
|
sc.Forward();
|
|
}
|
|
} else if (!seenDot && sc.ch == '.') {
|
|
seenDot = true;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
sc.Forward();
|
|
}
|
|
sc.SetState(endState);
|
|
}
|
|
|
|
static void ColouriseTADS3Doc(unsigned int startPos, int length, int initStyle,
|
|
WordList *keywordlists[], Accessor &styler) {
|
|
int visibleChars = 0;
|
|
int bracketLevel = 0;
|
|
int lineState = 0;
|
|
unsigned int endPos = startPos + length;
|
|
int lineCurrent = styler.GetLine(startPos);
|
|
if (lineCurrent > 0) {
|
|
lineState = styler.GetLineState(lineCurrent-1);
|
|
}
|
|
StyleContext sc(startPos, length, initStyle, styler);
|
|
|
|
while (sc.More()) {
|
|
|
|
if (IsEOL(sc.ch, sc.chNext)) {
|
|
styler.SetLineState(lineCurrent, lineState);
|
|
lineCurrent++;
|
|
visibleChars = 0;
|
|
sc.Forward();
|
|
if (sc.ch == '\n') {
|
|
sc.Forward();
|
|
}
|
|
}
|
|
|
|
switch(sc.state) {
|
|
case SCE_T3_PREPROCESSOR:
|
|
case SCE_T3_LINE_COMMENT:
|
|
ColouriseToEndOfLine(sc, sc.state, lineState&T3_INT_EXPRESSION ?
|
|
SCE_T3_X_DEFAULT : SCE_T3_DEFAULT);
|
|
break;
|
|
case SCE_T3_S_STRING:
|
|
case SCE_T3_D_STRING:
|
|
case SCE_T3_X_STRING:
|
|
ColouriseTADS3String(sc, lineState);
|
|
visibleChars++;
|
|
break;
|
|
case SCE_T3_MSG_PARAM:
|
|
ColouriseTADS3MsgParam(sc, lineState);
|
|
break;
|
|
case SCE_T3_LIB_DIRECTIVE:
|
|
ColouriseTADS3LibDirective(sc, lineState);
|
|
break;
|
|
case SCE_T3_HTML_DEFAULT:
|
|
ColouriseTADS3HTMLTag(sc, lineState);
|
|
break;
|
|
case SCE_T3_HTML_STRING:
|
|
ColouriseTADSHTMLString(sc, lineState);
|
|
break;
|
|
case SCE_T3_BLOCK_COMMENT:
|
|
ColouriseTADS3Comment(sc, lineState&T3_INT_EXPRESSION ?
|
|
SCE_T3_X_DEFAULT : SCE_T3_DEFAULT);
|
|
break;
|
|
case SCE_T3_DEFAULT:
|
|
case SCE_T3_X_DEFAULT:
|
|
if (IsASpaceOrTab(sc.ch)) {
|
|
sc.Forward();
|
|
} else if (sc.ch == '#' && visibleChars == 0) {
|
|
ColouriseToEndOfLine(sc, SCE_T3_PREPROCESSOR, sc.state);
|
|
} else if (sc.Match('/', '*')) {
|
|
ColouriseTADS3Comment(sc, sc.state);
|
|
visibleChars++;
|
|
} else if (sc.Match('/', '/')) {
|
|
ColouriseToEndOfLine(sc, SCE_T3_LINE_COMMENT, sc.state);
|
|
} else if (sc.ch == '"') {
|
|
bracketLevel = 0;
|
|
ColouriseTADS3String(sc, lineState);
|
|
visibleChars++;
|
|
} else if (sc.ch == '\'') {
|
|
ColouriseTADS3String(sc, lineState);
|
|
visibleChars++;
|
|
} else if (sc.state == SCE_T3_X_DEFAULT && bracketLevel == 0
|
|
&& sc.Match('>', '>')) {
|
|
sc.Forward(2);
|
|
sc.SetState(SCE_T3_D_STRING);
|
|
if (lineState & T3_INT_EXPRESSION_IN_TAG)
|
|
sc.SetState(SCE_T3_HTML_STRING);
|
|
lineState &= ~(T3_SINGLE_QUOTE|T3_INT_EXPRESSION
|
|
|T3_INT_EXPRESSION_IN_TAG);
|
|
} else if (IsATADS3Operator(sc.ch)) {
|
|
if (sc.state == SCE_T3_X_DEFAULT) {
|
|
if (sc.ch == '(') {
|
|
bracketLevel++;
|
|
} else if (sc.ch == ')' && bracketLevel > 0) {
|
|
bracketLevel--;
|
|
}
|
|
}
|
|
ColouriseTADS3Operator(sc);
|
|
visibleChars++;
|
|
} else if (IsANumberStart(sc)) {
|
|
ColouriseTADS3Number(sc);
|
|
visibleChars++;
|
|
} else if (IsAWordStart(sc.ch)) {
|
|
ColouriseTADS3Keyword(sc, keywordlists, endPos);
|
|
visibleChars++;
|
|
} else if (sc.Match("...")) {
|
|
sc.SetState(SCE_T3_IDENTIFIER);
|
|
sc.Forward(3);
|
|
sc.SetState(SCE_T3_DEFAULT);
|
|
} else {
|
|
sc.Forward();
|
|
visibleChars++;
|
|
}
|
|
break;
|
|
default:
|
|
sc.SetState(SCE_T3_DEFAULT);
|
|
sc.Forward();
|
|
}
|
|
}
|
|
sc.Complete();
|
|
}
|
|
|
|
/*
|
|
TADS3 has two styles of top level block (TLB). Eg
|
|
|
|
// default style
|
|
silverKey : Key 'small silver key' 'small silver key'
|
|
"A small key glints in the sunlight. "
|
|
;
|
|
|
|
and
|
|
|
|
silverKey : Key {
|
|
'small silver key'
|
|
'small silver key'
|
|
"A small key glints in the sunlight. "
|
|
}
|
|
|
|
Some constructs mandate one or the other, but usually the author has may choose
|
|
either.
|
|
|
|
T3_SEENSTART is used to indicate that a braceless TLB has been (potentially)
|
|
seen and is also used to match the closing ';' of the default style.
|
|
|
|
T3_EXPECTINGIDENTIFIER and T3_EXPECTINGPUNCTUATION are used to keep track of
|
|
what characters may be seen without incrementing the block level. The general
|
|
pattern is identifier <punc> identifier, acceptable punctuation characters
|
|
are ':', ',', '(' and ')'. No attempt is made to ensure that punctuation
|
|
characters are syntactically correct, eg parentheses match. A ')' always
|
|
signifies the start of a block. We just need to check if it is followed by a
|
|
'{', in which case we let the brace handling code handle the folding level.
|
|
|
|
expectingIdentifier == false && expectingIdentifier == false
|
|
Before the start of a TLB.
|
|
|
|
expectingIdentifier == true && expectingIdentifier == true
|
|
Currently in an identifier. Will accept identifier or punctuation.
|
|
|
|
expectingIdentifier == true && expectingIdentifier == false
|
|
Just seen a punctuation character & now waiting for an identifier to start.
|
|
|
|
expectingIdentifier == false && expectingIdentifier == truee
|
|
We were in an identifier and have seen space. Now waiting to see a punctuation
|
|
character
|
|
|
|
Space, comments & preprocessor directives are always acceptable and are
|
|
equivalent.
|
|
*/
|
|
|
|
static const int T3_SEENSTART = 1 << 12;
|
|
static const int T3_EXPECTINGIDENTIFIER = 1 << 13;
|
|
static const int T3_EXPECTINGPUNCTUATION = 1 << 14;
|
|
|
|
static inline bool IsStringTransition(int s1, int s2) {
|
|
return s1 != s2
|
|
&& (s1 == SCE_T3_S_STRING || s1 == SCE_T3_X_STRING
|
|
|| (s1 == SCE_T3_D_STRING && s2 != SCE_T3_X_DEFAULT))
|
|
&& s2 != SCE_T3_LIB_DIRECTIVE
|
|
&& s2 != SCE_T3_MSG_PARAM
|
|
&& s2 != SCE_T3_HTML_TAG
|
|
&& s2 != SCE_T3_HTML_STRING;
|
|
}
|
|
|
|
static inline bool IsATADS3Punctuation(const int ch) {
|
|
return ch == ':' || ch == ',' || ch == '(' || ch == ')';
|
|
}
|
|
|
|
static inline bool IsAnIdentifier(const int style) {
|
|
return style == SCE_T3_IDENTIFIER
|
|
|| style == SCE_T3_USER1
|
|
|| style == SCE_T3_USER2
|
|
|| style == SCE_T3_USER3;
|
|
}
|
|
|
|
static inline bool IsAnOperator(const int style) {
|
|
return style == SCE_T3_OPERATOR || style == SCE_T3_BRACE;
|
|
}
|
|
|
|
static inline bool IsSpaceEquivalent(const int ch, const int style) {
|
|
return isspace(ch)
|
|
|| style == SCE_T3_BLOCK_COMMENT
|
|
|| style == SCE_T3_LINE_COMMENT
|
|
|| style == SCE_T3_PREPROCESSOR;
|
|
}
|
|
|
|
static char peekAhead(unsigned int startPos, unsigned int endPos,
|
|
Accessor &styler) {
|
|
for (unsigned int i = startPos; i < endPos; i++) {
|
|
int style = styler.StyleAt(i);
|
|
char ch = styler[i];
|
|
if (!IsSpaceEquivalent(ch, style)) {
|
|
if (IsAnIdentifier(style)) {
|
|
return 'a';
|
|
}
|
|
if (IsATADS3Punctuation(ch)) {
|
|
return ':';
|
|
}
|
|
if (ch == '{') {
|
|
return '{';
|
|
}
|
|
return '*';
|
|
}
|
|
}
|
|
return ' ';
|
|
}
|
|
|
|
static void FoldTADS3Doc(unsigned int startPos, int length, int initStyle,
|
|
WordList *[], Accessor &styler) {
|
|
unsigned int endPos = startPos + length;
|
|
int lineCurrent = styler.GetLine(startPos);
|
|
int levelCurrent = SC_FOLDLEVELBASE;
|
|
if (lineCurrent > 0)
|
|
levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
|
|
int seenStart = levelCurrent & T3_SEENSTART;
|
|
int expectingIdentifier = levelCurrent & T3_EXPECTINGIDENTIFIER;
|
|
int expectingPunctuation = levelCurrent & T3_EXPECTINGPUNCTUATION;
|
|
levelCurrent &= SC_FOLDLEVELNUMBERMASK;
|
|
int levelMinCurrent = levelCurrent;
|
|
int levelNext = levelCurrent;
|
|
char chNext = styler[startPos];
|
|
int styleNext = styler.StyleAt(startPos);
|
|
int style = initStyle;
|
|
char ch = chNext;
|
|
int stylePrev = style;
|
|
bool redo = false;
|
|
for (unsigned int i = startPos; i < endPos; i++) {
|
|
if (redo) {
|
|
redo = false;
|
|
i--;
|
|
} else {
|
|
ch = chNext;
|
|
chNext = styler.SafeGetCharAt(i + 1);
|
|
stylePrev = style;
|
|
style = styleNext;
|
|
styleNext = styler.StyleAt(i + 1);
|
|
}
|
|
bool atEOL = IsEOL(ch, chNext);
|
|
|
|
if (levelNext == SC_FOLDLEVELBASE) {
|
|
if (IsSpaceEquivalent(ch, style)) {
|
|
if (expectingPunctuation) {
|
|
expectingIdentifier = 0;
|
|
}
|
|
if (style == SCE_T3_BLOCK_COMMENT) {
|
|
levelNext++;
|
|
}
|
|
} else if (ch == '{') {
|
|
levelNext++;
|
|
seenStart = 0;
|
|
} else if (ch == '\'' || ch == '"' || ch == '[') {
|
|
levelNext++;
|
|
if (seenStart) {
|
|
redo = true;
|
|
}
|
|
} else if (ch == ';') {
|
|
seenStart = 0;
|
|
expectingIdentifier = 0;
|
|
expectingPunctuation = 0;
|
|
} else if (expectingIdentifier && expectingPunctuation) {
|
|
if (IsATADS3Punctuation(ch)) {
|
|
if (ch == ')' && peekAhead(i+1, endPos, styler) != '{') {
|
|
levelNext++;
|
|
} else {
|
|
expectingPunctuation = 0;
|
|
}
|
|
} else if (!IsAnIdentifier(style)) {
|
|
levelNext++;
|
|
}
|
|
} else if (expectingIdentifier && !expectingPunctuation) {
|
|
if (!IsAnIdentifier(style)) {
|
|
levelNext++;
|
|
} else {
|
|
expectingPunctuation = T3_EXPECTINGPUNCTUATION;
|
|
}
|
|
} else if (!expectingIdentifier && expectingPunctuation) {
|
|
if (!IsATADS3Punctuation(ch)) {
|
|
levelNext++;
|
|
} else {
|
|
if (ch == ')' && peekAhead(i+1, endPos, styler) != '{') {
|
|
levelNext++;
|
|
} else {
|
|
expectingIdentifier = T3_EXPECTINGIDENTIFIER;
|
|
expectingPunctuation = 0;
|
|
}
|
|
}
|
|
} else if (!expectingIdentifier && !expectingPunctuation) {
|
|
if (IsAnIdentifier(style)) {
|
|
seenStart = T3_SEENSTART;
|
|
expectingIdentifier = T3_EXPECTINGIDENTIFIER;
|
|
expectingPunctuation = T3_EXPECTINGPUNCTUATION;
|
|
}
|
|
}
|
|
|
|
if (levelNext != SC_FOLDLEVELBASE && style != SCE_T3_BLOCK_COMMENT) {
|
|
expectingIdentifier = 0;
|
|
expectingPunctuation = 0;
|
|
}
|
|
|
|
} else if (levelNext == SC_FOLDLEVELBASE+1 && seenStart
|
|
&& ch == ';' && IsAnOperator(style)) {
|
|
levelNext--;
|
|
seenStart = 0;
|
|
} else if (style == SCE_T3_BLOCK_COMMENT) {
|
|
if (stylePrev != SCE_T3_BLOCK_COMMENT) {
|
|
levelNext++;
|
|
} else if (styleNext != SCE_T3_BLOCK_COMMENT && !atEOL) {
|
|
// Comments don't end at end of line and the next character may be unstyled.
|
|
levelNext--;
|
|
}
|
|
} else if (ch == '\'' || ch == '"') {
|
|
if (IsStringTransition(style, stylePrev)) {
|
|
if (levelMinCurrent > levelNext) {
|
|
levelMinCurrent = levelNext;
|
|
}
|
|
levelNext++;
|
|
} else if (IsStringTransition(style, styleNext)) {
|
|
levelNext--;
|
|
}
|
|
} else if (IsAnOperator(style)) {
|
|
if (ch == '{' || ch == '[') {
|
|
// Measure the minimum before a '{' to allow
|
|
// folding on "} else {"
|
|
if (levelMinCurrent > levelNext) {
|
|
levelMinCurrent = levelNext;
|
|
}
|
|
levelNext++;
|
|
} else if (ch == '}' || ch == ']') {
|
|
levelNext--;
|
|
}
|
|
}
|
|
|
|
if (atEOL) {
|
|
if (seenStart && levelNext == SC_FOLDLEVELBASE) {
|
|
switch (peekAhead(i+1, endPos, styler)) {
|
|
case ' ':
|
|
case '{':
|
|
break;
|
|
case '*':
|
|
levelNext++;
|
|
break;
|
|
case 'a':
|
|
if (expectingPunctuation) {
|
|
levelNext++;
|
|
}
|
|
break;
|
|
case ':':
|
|
if (expectingIdentifier) {
|
|
levelNext++;
|
|
}
|
|
break;
|
|
}
|
|
if (levelNext != SC_FOLDLEVELBASE) {
|
|
expectingIdentifier = 0;
|
|
expectingPunctuation = 0;
|
|
}
|
|
}
|
|
int lev = levelMinCurrent | (levelNext | expectingIdentifier
|
|
| expectingPunctuation | seenStart) << 16;
|
|
if (levelMinCurrent < levelNext)
|
|
lev |= SC_FOLDLEVELHEADERFLAG;
|
|
if (lev != styler.LevelAt(lineCurrent)) {
|
|
styler.SetLevel(lineCurrent, lev);
|
|
}
|
|
lineCurrent++;
|
|
levelCurrent = levelNext;
|
|
levelMinCurrent = levelCurrent;
|
|
}
|
|
}
|
|
}
|
|
|
|
static const char * const tads3WordList[] = {
|
|
"TADS3 Keywords",
|
|
"User defined 1",
|
|
"User defined 2",
|
|
"User defined 3",
|
|
0
|
|
};
|
|
|
|
LexerModule lmTADS3(SCLEX_TADS3, ColouriseTADS3Doc, "tads3", FoldTADS3Doc, tads3WordList);
|