471 lines
17 KiB
C++
471 lines
17 KiB
C++
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// Scintilla source code edit control
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/** @file LexVisualProlog.cxx
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** Lexer for Visual Prolog.
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**/
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// Author Thomas Linder Puls, Prolog Development Denter A/S, http://www.visual-prolog.com
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// Based on Lexer for C++, C, Java, and JavaScript.
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// Copyright 1998-2005 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 <ctype.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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#ifdef _MSC_VER
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#pragma warning(disable: 4786)
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#endif
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#include <string>
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#include <vector>
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#include <map>
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#include <algorithm>
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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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#include "OptionSet.h"
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#ifdef SCI_NAMESPACE
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using namespace Scintilla;
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#endif
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// Options used for LexerVisualProlog
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struct OptionsVisualProlog {
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OptionsVisualProlog() {
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}
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};
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static const char *const visualPrologWordLists[] = {
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"Major keywords (class, predicates, ...)",
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"Minor keywords (if, then, try, ...)",
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"Directive keywords without the '#' (include, requires, ...)",
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"Documentation keywords without the '@' (short, detail, ...)",
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0,
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};
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struct OptionSetVisualProlog : public OptionSet<OptionsVisualProlog> {
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OptionSetVisualProlog() {
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DefineWordListSets(visualPrologWordLists);
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}
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};
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class LexerVisualProlog : public ILexer {
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WordList majorKeywords;
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WordList minorKeywords;
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WordList directiveKeywords;
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WordList docKeywords;
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OptionsVisualProlog options;
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OptionSetVisualProlog osVisualProlog;
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public:
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LexerVisualProlog() {
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}
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virtual ~LexerVisualProlog() {
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}
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void SCI_METHOD Release() {
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delete this;
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}
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int SCI_METHOD Version() const {
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return lvOriginal;
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}
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const char * SCI_METHOD PropertyNames() {
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return osVisualProlog.PropertyNames();
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}
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int SCI_METHOD PropertyType(const char *name) {
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return osVisualProlog.PropertyType(name);
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}
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const char * SCI_METHOD DescribeProperty(const char *name) {
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return osVisualProlog.DescribeProperty(name);
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}
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int SCI_METHOD PropertySet(const char *key, const char *val);
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const char * SCI_METHOD DescribeWordListSets() {
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return osVisualProlog.DescribeWordListSets();
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}
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int SCI_METHOD WordListSet(int n, const char *wl);
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void SCI_METHOD Lex(unsigned int startPos, int length, int initStyle, IDocument *pAccess);
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void SCI_METHOD Fold(unsigned int startPos, int length, int initStyle, IDocument *pAccess);
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void * SCI_METHOD PrivateCall(int, void *) {
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return 0;
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}
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static ILexer *LexerFactoryVisualProlog() {
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return new LexerVisualProlog();
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}
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};
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int SCI_METHOD LexerVisualProlog::PropertySet(const char *key, const char *val) {
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if (osVisualProlog.PropertySet(&options, key, val)) {
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return 0;
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}
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return -1;
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}
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int SCI_METHOD LexerVisualProlog::WordListSet(int n, const char *wl) {
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WordList *wordListN = 0;
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switch (n) {
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case 0:
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wordListN = &majorKeywords;
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break;
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case 1:
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wordListN = &minorKeywords;
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break;
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case 2:
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wordListN = &directiveKeywords;
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break;
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case 3:
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wordListN = &docKeywords;
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break;
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}
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int firstModification = -1;
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if (wordListN) {
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WordList wlNew;
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wlNew.Set(wl);
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if (*wordListN != wlNew) {
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wordListN->Set(wl);
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firstModification = 0;
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}
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}
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return firstModification;
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}
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// Functor used to truncate history
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struct After {
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int line;
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After(int line_) : line(line_) {}
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};
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// Look ahead to see which colour "end" should have (takes colour after the following keyword)
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static void endLookAhead(char s[], LexAccessor &styler, int start, CharacterSet &setIdentifier) {
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char ch = styler.SafeGetCharAt(start, '\n');
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while (' ' == ch) {
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start++;
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ch = styler.SafeGetCharAt(start, '\n');
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}
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int i = 0;
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while (i < 100 && setIdentifier.Contains(ch)){
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s[i] = ch;
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i++;
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ch = styler.SafeGetCharAt(start + i, '\n');
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}
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s[i] = '\0';
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}
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static void forwardEscapeLiteral(StyleContext &sc, int OwnChar, int EscapeState) {
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sc.Forward();
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if (sc.ch == OwnChar || sc.ch == '\\' || sc.ch == 'n' || sc.ch == 'l' || sc.ch == 'r' || sc.ch == 't') {
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sc.ChangeState(EscapeState);
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} else if (sc.ch == 'u') {
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if (IsADigit(sc.chNext, 16)) {
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sc.Forward();
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if (IsADigit(sc.chNext, 16)) {
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sc.Forward();
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if (IsADigit(sc.chNext, 16)) {
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sc.Forward();
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if (IsADigit(sc.chNext, 16)) {
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sc.Forward();
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sc.ChangeState(EscapeState);
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}
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}
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}
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}
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}
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}
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void SCI_METHOD LexerVisualProlog::Lex(unsigned int startPos, int length, int initStyle, IDocument *pAccess) {
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LexAccessor styler(pAccess);
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CharacterSet setDoxygen(CharacterSet::setAlpha, "$@\\&<>#{}[]");
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CharacterSet setLowerStart(CharacterSet::setLower);
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CharacterSet setVariableStart(CharacterSet::setUpper);
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CharacterSet setIdentifier(CharacterSet::setAlphaNum, "_", 0x80, true);
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int styleBeforeDocKeyword = SCE_VISUALPROLOG_DEFAULT;
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int currentLine = styler.GetLine(startPos);
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int nestLevel = 0;
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if (currentLine >= 1)
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{
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nestLevel = styler.GetLineState(currentLine - 1);
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}
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StyleContext sc(startPos, length, initStyle, styler, 0x7f);
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// Truncate ppDefineHistory before current line
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for (; sc.More(); sc.Forward()) {
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if (sc.atLineEnd) {
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// Update the line state, so it can be seen by next line
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styler.SetLineState(currentLine, nestLevel);
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currentLine++;
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}
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if (sc.atLineStart) {
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if ((sc.state == SCE_VISUALPROLOG_STRING) || (sc.state == SCE_VISUALPROLOG_CHARACTER)) {
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// Prevent SCE_VISUALPROLOG_STRING_EOL from leaking back to previous line which
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// ends with a line continuation by locking in the state upto this position.
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sc.SetState(sc.state);
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}
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}
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const bool atLineEndBeforeSwitch = sc.atLineEnd;
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// Determine if the current state should terminate.
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switch (sc.state) {
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case SCE_VISUALPROLOG_OPERATOR:
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sc.SetState(SCE_VISUALPROLOG_DEFAULT);
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break;
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case SCE_VISUALPROLOG_NUMBER:
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// We accept almost anything because of hex. and number suffixes
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if (!(setIdentifier.Contains(sc.ch) || (sc.ch == '.') || ((sc.ch == '+' || sc.ch == '-') && (sc.chPrev == 'e' || sc.chPrev == 'E')))) {
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sc.SetState(SCE_VISUALPROLOG_DEFAULT);
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}
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break;
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case SCE_VISUALPROLOG_IDENTIFIER:
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if (!setIdentifier.Contains(sc.ch)) {
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char s[1000];
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sc.GetCurrent(s, sizeof(s));
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if (0 == strcmp(s, "end")) {
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endLookAhead(s, styler, sc.currentPos, setIdentifier);
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}
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if (majorKeywords.InList(s)) {
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sc.ChangeState(SCE_VISUALPROLOG_KEY_MAJOR);
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} else if (minorKeywords.InList(s)) {
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sc.ChangeState(SCE_VISUALPROLOG_KEY_MINOR);
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}
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sc.SetState(SCE_VISUALPROLOG_DEFAULT);
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}
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break;
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case SCE_VISUALPROLOG_VARIABLE:
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case SCE_VISUALPROLOG_ANONYMOUS:
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if (!setIdentifier.Contains(sc.ch)) {
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sc.SetState(SCE_VISUALPROLOG_DEFAULT);
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}
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break;
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case SCE_VISUALPROLOG_KEY_DIRECTIVE:
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if (!setLowerStart.Contains(sc.ch)) {
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char s[1000];
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sc.GetCurrent(s, sizeof(s));
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if (!directiveKeywords.InList(s+1)) {
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sc.ChangeState(SCE_VISUALPROLOG_IDENTIFIER);
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}
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sc.SetState(SCE_VISUALPROLOG_DEFAULT);
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}
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break;
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case SCE_VISUALPROLOG_COMMENT_BLOCK:
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if (sc.Match('*', '/')) {
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sc.Forward();
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nestLevel--;
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int nextState = (nestLevel == 0) ? SCE_VISUALPROLOG_DEFAULT : SCE_VISUALPROLOG_COMMENT_BLOCK;
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sc.ForwardSetState(nextState);
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} else if (sc.Match('/', '*')) {
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sc.Forward();
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nestLevel++;
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} else if (sc.ch == '%') {
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sc.SetState(SCE_VISUALPROLOG_COMMENT_LINE);
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} else if (sc.ch == '@') {
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styleBeforeDocKeyword = sc.state;
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sc.SetState(SCE_VISUALPROLOG_COMMENT_KEY_ERROR);
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}
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break;
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case SCE_VISUALPROLOG_COMMENT_LINE:
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if (sc.atLineEnd) {
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int nextState = (nestLevel == 0) ? SCE_VISUALPROLOG_DEFAULT : SCE_VISUALPROLOG_COMMENT_BLOCK;
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sc.SetState(nextState);
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} else if (sc.ch == '@') {
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styleBeforeDocKeyword = sc.state;
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sc.SetState(SCE_VISUALPROLOG_COMMENT_KEY_ERROR);
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}
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break;
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case SCE_VISUALPROLOG_COMMENT_KEY_ERROR:
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if (!setDoxygen.Contains(sc.ch)) {
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char s[1000];
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sc.GetCurrent(s, sizeof(s));
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if (docKeywords.InList(s+1)) {
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sc.ChangeState(SCE_VISUALPROLOG_COMMENT_KEY);
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}
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sc.SetState(styleBeforeDocKeyword);
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}
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if (SCE_VISUALPROLOG_COMMENT_LINE == styleBeforeDocKeyword && sc.atLineStart) {
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sc.SetState(SCE_VISUALPROLOG_DEFAULT);
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} else if (SCE_VISUALPROLOG_COMMENT_BLOCK == styleBeforeDocKeyword && sc.atLineStart) {
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sc.SetState(SCE_VISUALPROLOG_COMMENT_BLOCK);
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}
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break;
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case SCE_VISUALPROLOG_STRING_ESCAPE:
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case SCE_VISUALPROLOG_STRING_ESCAPE_ERROR:
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// return to SCE_VISUALPROLOG_STRING and treat as such (fall-through)
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sc.SetState(SCE_VISUALPROLOG_STRING);
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case SCE_VISUALPROLOG_STRING:
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if (sc.atLineEnd) {
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sc.SetState(SCE_VISUALPROLOG_STRING_EOL_OPEN);
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} else if (sc.ch == '"') {
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sc.ForwardSetState(SCE_VISUALPROLOG_DEFAULT);
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} else if (sc.ch == '\\') {
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sc.SetState(SCE_VISUALPROLOG_STRING_ESCAPE_ERROR);
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forwardEscapeLiteral(sc, '"', SCE_VISUALPROLOG_STRING_ESCAPE);
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}
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break;
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case SCE_VISUALPROLOG_CHARACTER_TOO_MANY:
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if (sc.atLineStart) {
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sc.SetState(SCE_VISUALPROLOG_DEFAULT);
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} else if (sc.ch == '\'') {
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sc.SetState(SCE_VISUALPROLOG_CHARACTER);
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sc.ForwardSetState(SCE_VISUALPROLOG_DEFAULT);
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}
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break;
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case SCE_VISUALPROLOG_CHARACTER:
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if (sc.atLineEnd) {
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sc.SetState(SCE_VISUALPROLOG_STRING_EOL_OPEN); // reuse STRING_EOL_OPEN for this
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} else if (sc.ch == '\'') {
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sc.SetState(SCE_VISUALPROLOG_CHARACTER_ESCAPE_ERROR);
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sc.ForwardSetState(SCE_VISUALPROLOG_DEFAULT);
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} else {
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if (sc.ch == '\\') {
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sc.SetState(SCE_VISUALPROLOG_CHARACTER_ESCAPE_ERROR);
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forwardEscapeLiteral(sc, '\'', SCE_VISUALPROLOG_CHARACTER);
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}
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sc.ForwardSetState(SCE_VISUALPROLOG_CHARACTER);
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if (sc.ch == '\'') {
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sc.ForwardSetState(SCE_VISUALPROLOG_DEFAULT);
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} else {
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sc.SetState(SCE_VISUALPROLOG_CHARACTER_TOO_MANY);
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}
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}
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break;
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case SCE_VISUALPROLOG_STRING_EOL_OPEN:
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if (sc.atLineStart) {
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sc.SetState(SCE_VISUALPROLOG_DEFAULT);
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}
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break;
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case SCE_VISUALPROLOG_STRING_VERBATIM_SPECIAL:
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case SCE_VISUALPROLOG_STRING_VERBATIM_EOL:
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// return to SCE_VISUALPROLOG_STRING_VERBATIM and treat as such (fall-through)
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sc.SetState(SCE_VISUALPROLOG_STRING_VERBATIM);
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case SCE_VISUALPROLOG_STRING_VERBATIM:
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if (sc.atLineEnd) {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_VERBATIM_EOL);
|
||
|
|
} else if (sc.ch == '\"') {
|
||
|
|
if (sc.chNext == '\"') {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_VERBATIM_SPECIAL);
|
||
|
|
sc.Forward();
|
||
|
|
} else {
|
||
|
|
sc.ForwardSetState(SCE_VISUALPROLOG_DEFAULT);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (sc.atLineEnd && !atLineEndBeforeSwitch) {
|
||
|
|
// State exit processing consumed characters up to end of line.
|
||
|
|
currentLine++;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Determine if a new state should be entered.
|
||
|
|
if (sc.state == SCE_VISUALPROLOG_DEFAULT) {
|
||
|
|
if (sc.Match('@', '\"')) {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_VERBATIM);
|
||
|
|
sc.Forward();
|
||
|
|
} else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_NUMBER);
|
||
|
|
} else if (setLowerStart.Contains(sc.ch)) {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_IDENTIFIER);
|
||
|
|
} else if (setVariableStart.Contains(sc.ch)) {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_VARIABLE);
|
||
|
|
} else if (sc.ch == '_') {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_ANONYMOUS);
|
||
|
|
} else if (sc.Match('/', '*')) {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_COMMENT_BLOCK);
|
||
|
|
nestLevel = 1;
|
||
|
|
sc.Forward(); // Eat the * so it isn't used for the end of the comment
|
||
|
|
} else if (sc.ch == '%') {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_COMMENT_LINE);
|
||
|
|
} else if (sc.ch == '\"') {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_STRING);
|
||
|
|
} else if (sc.ch == '\'') {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_CHARACTER);
|
||
|
|
} else if (sc.ch == '#') {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_KEY_DIRECTIVE);
|
||
|
|
} else if (isoperator(static_cast<char>(sc.ch)) || sc.ch == '\\') {
|
||
|
|
sc.SetState(SCE_VISUALPROLOG_OPERATOR);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
sc.Complete();
|
||
|
|
styler.Flush();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Store both the current line's fold level and the next lines in the
|
||
|
|
// level store to make it easy to pick up with each increment
|
||
|
|
// and to make it possible to fiddle the current level for "} else {".
|
||
|
|
|
||
|
|
void SCI_METHOD LexerVisualProlog::Fold(unsigned int startPos, int length, int initStyle, IDocument *pAccess) {
|
||
|
|
|
||
|
|
LexAccessor styler(pAccess);
|
||
|
|
|
||
|
|
unsigned int endPos = startPos + length;
|
||
|
|
int visibleChars = 0;
|
||
|
|
int currentLine = styler.GetLine(startPos);
|
||
|
|
int levelCurrent = SC_FOLDLEVELBASE;
|
||
|
|
if (currentLine > 0)
|
||
|
|
levelCurrent = styler.LevelAt(currentLine-1) >> 16;
|
||
|
|
int levelMinCurrent = levelCurrent;
|
||
|
|
int levelNext = levelCurrent;
|
||
|
|
char chNext = styler[startPos];
|
||
|
|
int styleNext = styler.StyleAt(startPos);
|
||
|
|
int style = initStyle;
|
||
|
|
for (unsigned int i = startPos; i < endPos; i++) {
|
||
|
|
char ch = chNext;
|
||
|
|
chNext = styler.SafeGetCharAt(i + 1);
|
||
|
|
style = styleNext;
|
||
|
|
styleNext = styler.StyleAt(i + 1);
|
||
|
|
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
|
||
|
|
if (style == SCE_VISUALPROLOG_OPERATOR) {
|
||
|
|
if (ch == '{') {
|
||
|
|
// Measure the minimum before a '{' to allow
|
||
|
|
// folding on "} else {"
|
||
|
|
if (levelMinCurrent > levelNext) {
|
||
|
|
levelMinCurrent = levelNext;
|
||
|
|
}
|
||
|
|
levelNext++;
|
||
|
|
} else if (ch == '}') {
|
||
|
|
levelNext--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!IsASpace(ch))
|
||
|
|
visibleChars++;
|
||
|
|
if (atEOL || (i == endPos-1)) {
|
||
|
|
int levelUse = levelCurrent;
|
||
|
|
int lev = levelUse | levelNext << 16;
|
||
|
|
if (levelUse < levelNext)
|
||
|
|
lev |= SC_FOLDLEVELHEADERFLAG;
|
||
|
|
if (lev != styler.LevelAt(currentLine)) {
|
||
|
|
styler.SetLevel(currentLine, lev);
|
||
|
|
}
|
||
|
|
currentLine++;
|
||
|
|
levelCurrent = levelNext;
|
||
|
|
levelMinCurrent = levelCurrent;
|
||
|
|
if (atEOL && (i == static_cast<unsigned int>(styler.Length()-1))) {
|
||
|
|
// There is an empty line at end of file so give it same level and empty
|
||
|
|
styler.SetLevel(currentLine, (levelCurrent | levelCurrent << 16) | SC_FOLDLEVELWHITEFLAG);
|
||
|
|
}
|
||
|
|
visibleChars = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
LexerModule lmVisualProlog(SCLEX_VISUALPROLOG, LexerVisualProlog::LexerFactoryVisualProlog, "visualprolog", visualPrologWordLists);
|