575 lines
17 KiB
C++
575 lines
17 KiB
C++
/** @file LexD.cxx
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** Lexer for D.
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**
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** Copyright (c) 2006 by Waldemar Augustyn <waldemar@wdmsys.com>
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** Converted to lexer object and added further folding features/properties by "Udo Lechner" <dlchnr(at)gmx(dot)net>
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**/
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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 <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 <string>
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#include <string_view>
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#include <map>
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#include <functional>
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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 "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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#include "DefaultLexer.h"
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using namespace Scintilla;
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using namespace Lexilla;
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/* Nested comments require keeping the value of the nesting level for every
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position in the document. But since scintilla always styles line by line,
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we only need to store one value per line. The non-negative number indicates
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nesting level at the end of the line.
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*/
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// Underscore, letter, digit and universal alphas from C99 Appendix D.
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static bool IsWordStart(int ch) {
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return (IsASCII(ch) && (isalpha(ch) || ch == '_')) || !IsASCII(ch);
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}
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static bool IsWord(int ch) {
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return (IsASCII(ch) && (isalnum(ch) || ch == '_')) || !IsASCII(ch);
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}
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static bool IsDoxygen(int ch) {
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if (IsASCII(ch) && islower(ch))
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return true;
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if (ch == '$' || ch == '@' || ch == '\\' ||
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ch == '&' || ch == '#' || ch == '<' || ch == '>' ||
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ch == '{' || ch == '}' || ch == '[' || ch == ']')
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return true;
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return false;
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}
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static bool IsStringSuffix(int ch) {
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return ch == 'c' || ch == 'w' || ch == 'd';
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}
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static bool IsStreamCommentStyle(int style) {
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return style == SCE_D_COMMENT ||
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style == SCE_D_COMMENTDOC ||
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style == SCE_D_COMMENTDOCKEYWORD ||
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style == SCE_D_COMMENTDOCKEYWORDERROR;
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}
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// An individual named option for use in an OptionSet
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// Options used for LexerD
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struct OptionsD {
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bool fold;
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bool foldSyntaxBased;
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bool foldComment;
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bool foldCommentMultiline;
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bool foldCommentExplicit;
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std::string foldExplicitStart;
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std::string foldExplicitEnd;
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bool foldExplicitAnywhere;
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bool foldCompact;
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int foldAtElseInt;
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bool foldAtElse;
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OptionsD() {
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fold = false;
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foldSyntaxBased = true;
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foldComment = false;
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foldCommentMultiline = true;
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foldCommentExplicit = true;
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foldExplicitStart = "";
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foldExplicitEnd = "";
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foldExplicitAnywhere = false;
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foldCompact = true;
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foldAtElseInt = -1;
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foldAtElse = false;
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}
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};
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static const char * const dWordLists[] = {
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"Primary keywords and identifiers",
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"Secondary keywords and identifiers",
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"Documentation comment keywords",
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"Type definitions and aliases",
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"Keywords 5",
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"Keywords 6",
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"Keywords 7",
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0,
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};
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struct OptionSetD : public OptionSet<OptionsD> {
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OptionSetD() {
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DefineProperty("fold", &OptionsD::fold);
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DefineProperty("fold.d.syntax.based", &OptionsD::foldSyntaxBased,
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"Set this property to 0 to disable syntax based folding.");
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DefineProperty("fold.comment", &OptionsD::foldComment);
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DefineProperty("fold.d.comment.multiline", &OptionsD::foldCommentMultiline,
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"Set this property to 0 to disable folding multi-line comments when fold.comment=1.");
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DefineProperty("fold.d.comment.explicit", &OptionsD::foldCommentExplicit,
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"Set this property to 0 to disable folding explicit fold points when fold.comment=1.");
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DefineProperty("fold.d.explicit.start", &OptionsD::foldExplicitStart,
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"The string to use for explicit fold start points, replacing the standard //{.");
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DefineProperty("fold.d.explicit.end", &OptionsD::foldExplicitEnd,
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"The string to use for explicit fold end points, replacing the standard //}.");
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DefineProperty("fold.d.explicit.anywhere", &OptionsD::foldExplicitAnywhere,
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"Set this property to 1 to enable explicit fold points anywhere, not just in line comments.");
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DefineProperty("fold.compact", &OptionsD::foldCompact);
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DefineProperty("lexer.d.fold.at.else", &OptionsD::foldAtElseInt,
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"This option enables D folding on a \"} else {\" line of an if statement.");
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DefineProperty("fold.at.else", &OptionsD::foldAtElse);
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DefineWordListSets(dWordLists);
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}
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};
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class LexerD : public DefaultLexer {
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bool caseSensitive;
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WordList keywords;
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WordList keywords2;
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WordList keywords3;
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WordList keywords4;
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WordList keywords5;
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WordList keywords6;
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WordList keywords7;
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OptionsD options;
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OptionSetD osD;
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public:
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LexerD(bool caseSensitive_) :
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DefaultLexer("D", SCLEX_D),
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caseSensitive(caseSensitive_) {
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}
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virtual ~LexerD() {
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}
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void SCI_METHOD Release() override {
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delete this;
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}
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int SCI_METHOD Version() const override {
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return lvRelease5;
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}
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const char * SCI_METHOD PropertyNames() override {
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return osD.PropertyNames();
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}
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int SCI_METHOD PropertyType(const char *name) override {
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return osD.PropertyType(name);
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}
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const char * SCI_METHOD DescribeProperty(const char *name) override {
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return osD.DescribeProperty(name);
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}
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Sci_Position SCI_METHOD PropertySet(const char *key, const char *val) override;
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const char * SCI_METHOD PropertyGet(const char *key) override {
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return osD.PropertyGet(key);
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}
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const char * SCI_METHOD DescribeWordListSets() override {
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return osD.DescribeWordListSets();
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}
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Sci_Position SCI_METHOD WordListSet(int n, const char *wl) override;
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void SCI_METHOD Lex(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) override;
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void SCI_METHOD Fold(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) override;
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void * SCI_METHOD PrivateCall(int, void *) override {
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return 0;
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}
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static ILexer5 *LexerFactoryD() {
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return new LexerD(true);
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}
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static ILexer5 *LexerFactoryDInsensitive() {
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return new LexerD(false);
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}
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};
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Sci_Position SCI_METHOD LexerD::PropertySet(const char *key, const char *val) {
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if (osD.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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Sci_Position SCI_METHOD LexerD::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 = &keywords;
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break;
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case 1:
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wordListN = &keywords2;
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break;
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case 2:
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wordListN = &keywords3;
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break;
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case 3:
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wordListN = &keywords4;
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break;
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case 4:
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wordListN = &keywords5;
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break;
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case 5:
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wordListN = &keywords6;
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break;
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case 6:
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wordListN = &keywords7;
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break;
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}
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Sci_Position 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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void SCI_METHOD LexerD::Lex(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) {
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LexAccessor styler(pAccess);
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int styleBeforeDCKeyword = SCE_D_DEFAULT;
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StyleContext sc(startPos, length, initStyle, styler);
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Sci_Position curLine = styler.GetLine(startPos);
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int curNcLevel = curLine > 0? styler.GetLineState(curLine-1): 0;
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bool numFloat = false; // Float literals have '+' and '-' signs
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bool numHex = false;
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for (; sc.More(); sc.Forward()) {
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if (sc.atLineStart) {
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curLine = styler.GetLine(sc.currentPos);
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styler.SetLineState(curLine, curNcLevel);
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}
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// Determine if the current state should terminate.
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switch (sc.state) {
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case SCE_D_OPERATOR:
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sc.SetState(SCE_D_DEFAULT);
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break;
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case SCE_D_NUMBER:
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// We accept almost anything because of hex. and number suffixes
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if (IsASCII(sc.ch) && (isalnum(sc.ch) || sc.ch == '_')) {
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continue;
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} else if (sc.ch == '.' && sc.chNext != '.' && !numFloat) {
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// Don't parse 0..2 as number.
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numFloat=true;
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continue;
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} else if ( ( sc.ch == '-' || sc.ch == '+' ) && ( /*sign and*/
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( !numHex && ( sc.chPrev == 'e' || sc.chPrev == 'E' ) ) || /*decimal or*/
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( sc.chPrev == 'p' || sc.chPrev == 'P' ) ) ) { /*hex*/
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// Parse exponent sign in float literals: 2e+10 0x2e+10
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continue;
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} else {
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sc.SetState(SCE_D_DEFAULT);
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}
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break;
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case SCE_D_IDENTIFIER:
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if (!IsWord(sc.ch)) {
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char s[1000];
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if (caseSensitive) {
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sc.GetCurrent(s, sizeof(s));
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} else {
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sc.GetCurrentLowered(s, sizeof(s));
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}
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if (keywords.InList(s)) {
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sc.ChangeState(SCE_D_WORD);
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} else if (keywords2.InList(s)) {
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sc.ChangeState(SCE_D_WORD2);
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} else if (keywords4.InList(s)) {
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sc.ChangeState(SCE_D_TYPEDEF);
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} else if (keywords5.InList(s)) {
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sc.ChangeState(SCE_D_WORD5);
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} else if (keywords6.InList(s)) {
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sc.ChangeState(SCE_D_WORD6);
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} else if (keywords7.InList(s)) {
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sc.ChangeState(SCE_D_WORD7);
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}
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sc.SetState(SCE_D_DEFAULT);
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}
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break;
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case SCE_D_COMMENT:
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if (sc.Match('*', '/')) {
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sc.Forward();
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sc.ForwardSetState(SCE_D_DEFAULT);
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}
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break;
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case SCE_D_COMMENTDOC:
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if (sc.Match('*', '/')) {
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sc.Forward();
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sc.ForwardSetState(SCE_D_DEFAULT);
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} else if (sc.ch == '@' || sc.ch == '\\') { // JavaDoc and Doxygen support
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// Verify that we have the conditions to mark a comment-doc-keyword
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if ((IsASpace(sc.chPrev) || sc.chPrev == '*') && (!IsASpace(sc.chNext))) {
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styleBeforeDCKeyword = SCE_D_COMMENTDOC;
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sc.SetState(SCE_D_COMMENTDOCKEYWORD);
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}
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}
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break;
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case SCE_D_COMMENTLINE:
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if (sc.atLineStart) {
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sc.SetState(SCE_D_DEFAULT);
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}
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break;
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case SCE_D_COMMENTLINEDOC:
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if (sc.atLineStart) {
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sc.SetState(SCE_D_DEFAULT);
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} else if (sc.ch == '@' || sc.ch == '\\') { // JavaDoc and Doxygen support
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// Verify that we have the conditions to mark a comment-doc-keyword
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if ((IsASpace(sc.chPrev) || sc.chPrev == '/' || sc.chPrev == '!') && (!IsASpace(sc.chNext))) {
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styleBeforeDCKeyword = SCE_D_COMMENTLINEDOC;
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sc.SetState(SCE_D_COMMENTDOCKEYWORD);
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}
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}
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break;
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case SCE_D_COMMENTDOCKEYWORD:
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if ((styleBeforeDCKeyword == SCE_D_COMMENTDOC) && sc.Match('*', '/')) {
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sc.ChangeState(SCE_D_COMMENTDOCKEYWORDERROR);
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sc.Forward();
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sc.ForwardSetState(SCE_D_DEFAULT);
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} else if (!IsDoxygen(sc.ch)) {
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char s[100];
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if (caseSensitive) {
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sc.GetCurrent(s, sizeof(s));
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} else {
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sc.GetCurrentLowered(s, sizeof(s));
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}
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if (!IsASpace(sc.ch) || !keywords3.InList(s + 1)) {
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sc.ChangeState(SCE_D_COMMENTDOCKEYWORDERROR);
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}
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sc.SetState(styleBeforeDCKeyword);
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}
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break;
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case SCE_D_COMMENTNESTED:
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if (sc.Match('+', '/')) {
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if (curNcLevel > 0)
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curNcLevel -= 1;
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curLine = styler.GetLine(sc.currentPos);
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styler.SetLineState(curLine, curNcLevel);
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sc.Forward();
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if (curNcLevel == 0) {
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sc.ForwardSetState(SCE_D_DEFAULT);
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}
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} else if (sc.Match('/','+')) {
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curNcLevel += 1;
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curLine = styler.GetLine(sc.currentPos);
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styler.SetLineState(curLine, curNcLevel);
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sc.Forward();
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}
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break;
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case SCE_D_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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if(IsStringSuffix(sc.chNext))
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sc.Forward();
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sc.ForwardSetState(SCE_D_DEFAULT);
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}
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break;
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case SCE_D_CHARACTER:
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if (sc.atLineEnd) {
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sc.ChangeState(SCE_D_STRINGEOL);
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} else 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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// Char has no suffixes
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sc.ForwardSetState(SCE_D_DEFAULT);
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}
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break;
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case SCE_D_STRINGEOL:
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if (sc.atLineStart) {
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sc.SetState(SCE_D_DEFAULT);
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}
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break;
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case SCE_D_STRINGB:
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if (sc.ch == '`') {
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if(IsStringSuffix(sc.chNext))
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sc.Forward();
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sc.ForwardSetState(SCE_D_DEFAULT);
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}
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break;
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case SCE_D_STRINGR:
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if (sc.ch == '"') {
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if(IsStringSuffix(sc.chNext))
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sc.Forward();
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sc.ForwardSetState(SCE_D_DEFAULT);
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}
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break;
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}
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// Determine if a new state should be entered.
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if (sc.state == SCE_D_DEFAULT) {
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if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
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sc.SetState(SCE_D_NUMBER);
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numFloat = sc.ch == '.';
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// Remember hex literal
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numHex = sc.ch == '0' && ( sc.chNext == 'x' || sc.chNext == 'X' );
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} else if ( (sc.ch == 'r' || sc.ch == 'x' || sc.ch == 'q')
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&& sc.chNext == '"' ) {
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// Limited support for hex and delimited strings: parse as r""
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sc.SetState(SCE_D_STRINGR);
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sc.Forward();
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} else if (IsWordStart(sc.ch) || sc.ch == '$') {
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sc.SetState(SCE_D_IDENTIFIER);
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} else if (sc.Match('/','+')) {
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curNcLevel += 1;
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curLine = styler.GetLine(sc.currentPos);
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styler.SetLineState(curLine, curNcLevel);
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sc.SetState(SCE_D_COMMENTNESTED);
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sc.Forward();
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} else if (sc.Match('/', '*')) {
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if (sc.Match("/**") || sc.Match("/*!")) { // Support of Qt/Doxygen doc. style
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sc.SetState(SCE_D_COMMENTDOC);
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} else {
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sc.SetState(SCE_D_COMMENT);
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}
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sc.Forward(); // Eat the * so it isn't used for the end of the comment
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} else if (sc.Match('/', '/')) {
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if ((sc.Match("///") && !sc.Match("////")) || sc.Match("//!"))
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// Support of Qt/Doxygen doc. style
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sc.SetState(SCE_D_COMMENTLINEDOC);
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else
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sc.SetState(SCE_D_COMMENTLINE);
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} else if (sc.ch == '"') {
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sc.SetState(SCE_D_STRING);
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} else if (sc.ch == '\'') {
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sc.SetState(SCE_D_CHARACTER);
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} else if (sc.ch == '`') {
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sc.SetState(SCE_D_STRINGB);
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} else if (isoperator(static_cast<char>(sc.ch))) {
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sc.SetState(SCE_D_OPERATOR);
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if (sc.ch == '.' && sc.chNext == '.') sc.Forward(); // Range operator
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}
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}
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}
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sc.Complete();
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}
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// Store both the current line's fold level and the next lines in the
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// level store to make it easy to pick up with each increment
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// and to make it possible to fiddle the current level for "} else {".
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void SCI_METHOD LexerD::Fold(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) {
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if (!options.fold)
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return;
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LexAccessor styler(pAccess);
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Sci_PositionU endPos = startPos + length;
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int visibleChars = 0;
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Sci_Position lineCurrent = styler.GetLine(startPos);
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int levelCurrent = SC_FOLDLEVELBASE;
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if (lineCurrent > 0)
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levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
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int levelMinCurrent = levelCurrent;
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int levelNext = levelCurrent;
|
|
char chNext = styler[startPos];
|
|
int styleNext = styler.StyleAt(startPos);
|
|
int style = initStyle;
|
|
bool foldAtElse = options.foldAtElseInt >= 0 ? options.foldAtElseInt != 0 : options.foldAtElse;
|
|
const bool userDefinedFoldMarkers = !options.foldExplicitStart.empty() && !options.foldExplicitEnd.empty();
|
|
for (Sci_PositionU i = startPos; i < endPos; i++) {
|
|
char ch = chNext;
|
|
chNext = styler.SafeGetCharAt(i + 1);
|
|
int stylePrev = style;
|
|
style = styleNext;
|
|
styleNext = styler.StyleAt(i + 1);
|
|
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
|
|
if (options.foldComment && options.foldCommentMultiline && IsStreamCommentStyle(style)) {
|
|
if (!IsStreamCommentStyle(stylePrev)) {
|
|
levelNext++;
|
|
} else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
|
|
// Comments don't end at end of line and the next character may be unstyled.
|
|
levelNext--;
|
|
}
|
|
}
|
|
if (options.foldComment && options.foldCommentExplicit && ((style == SCE_D_COMMENTLINE) || options.foldExplicitAnywhere)) {
|
|
if (userDefinedFoldMarkers) {
|
|
if (styler.Match(i, options.foldExplicitStart.c_str())) {
|
|
levelNext++;
|
|
} else if (styler.Match(i, options.foldExplicitEnd.c_str())) {
|
|
levelNext--;
|
|
}
|
|
} else {
|
|
if ((ch == '/') && (chNext == '/')) {
|
|
char chNext2 = styler.SafeGetCharAt(i + 2);
|
|
if (chNext2 == '{') {
|
|
levelNext++;
|
|
} else if (chNext2 == '}') {
|
|
levelNext--;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (options.foldSyntaxBased && (style == SCE_D_OPERATOR)) {
|
|
if (ch == '{') {
|
|
// Measure the minimum before a '{' to allow
|
|
// folding on "} else {"
|
|
if (levelMinCurrent > levelNext) {
|
|
levelMinCurrent = levelNext;
|
|
}
|
|
levelNext++;
|
|
} else if (ch == '}') {
|
|
levelNext--;
|
|
}
|
|
}
|
|
if (atEOL || (i == endPos-1)) {
|
|
if (options.foldComment && options.foldCommentMultiline) { // Handle nested comments
|
|
int nc;
|
|
nc = styler.GetLineState(lineCurrent);
|
|
nc -= lineCurrent>0? styler.GetLineState(lineCurrent-1): 0;
|
|
levelNext += nc;
|
|
}
|
|
int levelUse = levelCurrent;
|
|
if (options.foldSyntaxBased && foldAtElse) {
|
|
levelUse = levelMinCurrent;
|
|
}
|
|
int lev = levelUse | levelNext << 16;
|
|
if (visibleChars == 0 && options.foldCompact)
|
|
lev |= SC_FOLDLEVELWHITEFLAG;
|
|
if (levelUse < levelNext)
|
|
lev |= SC_FOLDLEVELHEADERFLAG;
|
|
if (lev != styler.LevelAt(lineCurrent)) {
|
|
styler.SetLevel(lineCurrent, lev);
|
|
}
|
|
lineCurrent++;
|
|
levelCurrent = levelNext;
|
|
levelMinCurrent = levelCurrent;
|
|
visibleChars = 0;
|
|
}
|
|
if (!IsASpace(ch))
|
|
visibleChars++;
|
|
}
|
|
}
|
|
|
|
LexerModule lmD(SCLEX_D, LexerD::LexerFactoryD, "d", dWordLists);
|