565 lines
21 KiB
C++
565 lines
21 KiB
C++
// Scintilla source code edit control
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/** @file LexProgress.cxx
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** Lexer for Progress 4GL.
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** Based on LexCPP.cxx of Neil Hodgson <neilh@scintilla.org>
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**/
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// Copyright 2006-2016 by Yuval Papish <Yuval@YuvCom.com>
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// The License.txt file describes the conditions under which this software may be distributed.
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/** TODO:
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SpeedScript support in html lexer
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Differentiate between labels and variables
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Option 1: By symbols table
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Option 2: As a single unidentified symbol in a sytactical line
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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 <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 "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 "SparseState.h"
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#include "DefaultLexer.h"
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using namespace Scintilla;
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namespace {
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// Use an unnamed namespace to protect the functions and classes from name conflicts
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bool IsSpaceEquiv(int state) {
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return (state == SCE_ABL_COMMENT ||
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state == SCE_ABL_LINECOMMENT ||
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state == SCE_ABL_DEFAULT);
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}
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void highlightTaskMarker(StyleContext &sc, LexAccessor &styler, WordList &markerList){
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if ((isoperator(sc.chPrev) || IsASpace(sc.chPrev)) && markerList.Length()) {
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const int lengthMarker = 50;
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char marker[lengthMarker+1];
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Sci_Position currPos = (Sci_Position) sc.currentPos;
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Sci_Position i = 0;
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while (i < lengthMarker) {
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char ch = styler.SafeGetCharAt(currPos + i);
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if (IsASpace(ch) || isoperator(ch)) {
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break;
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}
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marker[i] = ch;
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i++;
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}
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marker[i] = '\0';
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if (markerList.InListAbbreviated (marker,'(')) {
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sc.SetState(SCE_ABL_TASKMARKER);
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}
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}
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}
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bool IsStreamCommentStyle(int style) {
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return style == SCE_ABL_COMMENT;
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// style == SCE_ABL_LINECOMMENT; Only block comments are used for folding
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}
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// Options used for LexerABL
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struct OptionsABL {
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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 foldCompact;
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OptionsABL() {
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fold = false;
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foldSyntaxBased = true;
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foldComment = true;
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foldCommentMultiline = true;
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foldCompact = false;
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}
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};
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const char *const ablWordLists[] = {
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"Primary keywords and identifiers",
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"Keywords that opens a block, only when used to begin a syntactic line",
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"Keywords that opens a block anywhere in a syntactic line",
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"Task Marker", /* "END MODIFY START TODO" */
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0,
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};
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struct OptionSetABL : public OptionSet<OptionsABL> {
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OptionSetABL() {
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DefineProperty("fold", &OptionsABL::fold);
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DefineProperty("fold.abl.syntax.based", &OptionsABL::foldSyntaxBased,
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"Set this property to 0 to disable syntax based folding.");
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DefineProperty("fold.comment", &OptionsABL::foldComment,
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"This option enables folding multi-line comments and explicit fold points when using the ABL lexer. ");
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DefineProperty("fold.abl.comment.multiline", &OptionsABL::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.compact", &OptionsABL::foldCompact);
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DefineWordListSets(ablWordLists);
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}
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};
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}
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class LexerABL : public DefaultLexer {
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CharacterSet setWord;
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CharacterSet setNegationOp;
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CharacterSet setArithmethicOp;
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CharacterSet setRelOp;
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CharacterSet setLogicalOp;
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CharacterSet setWordStart;
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WordList keywords1; // regular keywords
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WordList keywords2; // block opening keywords, only when isSentenceStart
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WordList keywords3; // block opening keywords
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WordList keywords4; // Task Marker
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OptionsABL options;
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OptionSetABL osABL;
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public:
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LexerABL() :
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setWord(CharacterSet::setAlphaNum, "_", 0x80, true),
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setNegationOp(CharacterSet::setNone, "!"),
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setArithmethicOp(CharacterSet::setNone, "+-/*%"),
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setRelOp(CharacterSet::setNone, "=!<>"),
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setLogicalOp(CharacterSet::setNone, "|&"){
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}
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virtual ~LexerABL() {
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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 lvRelease4;
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}
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const char * SCI_METHOD PropertyNames() override {
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return osABL.PropertyNames();
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}
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int SCI_METHOD PropertyType(const char *name) override {
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return osABL.PropertyType(name);
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}
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const char * SCI_METHOD DescribeProperty(const char *name) override {
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return osABL.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 DescribeWordListSets() override {
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return osABL.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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int SCI_METHOD LineEndTypesSupported() override {
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return SC_LINE_END_TYPE_DEFAULT;
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}
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static ILexer4 *LexerFactoryABL() {
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return new LexerABL();
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}
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};
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Sci_Position SCI_METHOD LexerABL::PropertySet(const char *key, const char *val) {
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if (osABL.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 LexerABL::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 = &keywords1;
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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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}
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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 LexerABL::Lex(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) {
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LexAccessor styler(pAccess);
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setWordStart = CharacterSet(CharacterSet::setAlpha, "_", 0x80, true);
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int visibleChars = 0;
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int visibleChars1 = 0;
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int styleBeforeTaskMarker = SCE_ABL_DEFAULT;
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bool continuationLine = false;
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int commentNestingLevel = 0;
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bool isSentenceStart = true;
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bool possibleOOLChange = false;
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Sci_Position lineCurrent = styler.GetLine(startPos);
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if (initStyle == SCE_ABL_PREPROCESSOR) {
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// Set continuationLine if last character of previous line is '~'
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if (lineCurrent > 0) {
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Sci_Position endLinePrevious = styler.LineEnd(lineCurrent-1);
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if (endLinePrevious > 0) {
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continuationLine = styler.SafeGetCharAt(endLinePrevious-1) == '~';
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}
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}
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}
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// Look back to set variables that are actually invisible secondary states. The reason to avoid formal states is to cut down on state's bits
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if (startPos > 0) {
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Sci_Position back = startPos;
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bool checkCommentNestingLevel = (initStyle == SCE_ABL_COMMENT);
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bool checkIsSentenceStart = (initStyle == SCE_ABL_DEFAULT || initStyle == SCE_ABL_IDENTIFIER);
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char ch;
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char st;
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char chPrev;
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char chPrev_1;
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char chPrev_2;
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char chPrev_3;
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while (back >= 0 && (checkCommentNestingLevel || checkIsSentenceStart)) {
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ch = styler.SafeGetCharAt(back);
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styler.Flush(); // looking at styles so need to flush
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st = styler.StyleAt(back);
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chPrev = styler.SafeGetCharAt(back-1);
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// isSentenceStart is a non-visible state, used to identify where statements and preprocessor declerations can start
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if (checkIsSentenceStart && st != SCE_ABL_COMMENT && st != SCE_ABL_LINECOMMENT && st != SCE_ABL_CHARACTER && st != SCE_ABL_STRING ) {
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chPrev_1 = styler.SafeGetCharAt(back-2);
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chPrev_2 = styler.SafeGetCharAt(back-3);
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chPrev_3 = styler.SafeGetCharAt(back-4);
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if ((chPrev == '.' || chPrev == ':' || chPrev == '}' ||
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(chPrev_3 == 'e' && chPrev_2 == 'l' && chPrev_1 == 's' && chPrev == 'e') ||
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(chPrev_3 == 't' && chPrev_2 == 'h' && chPrev_1 == 'e' && chPrev == 'n')) &&
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(IsASpace(ch) || (ch == '/' && styler.SafeGetCharAt(back+1) == '*'))
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) {
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checkIsSentenceStart = false;
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isSentenceStart = true;
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}
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else if (IsASpace(chPrev) && ch == '{') {
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checkIsSentenceStart = false;
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isSentenceStart = false;
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}
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}
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// commentNestingLevel is a non-visible state, used to identify the nesting level of a comment
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if (checkCommentNestingLevel) {
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if (chPrev == '/' && ch == '*') {
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commentNestingLevel++;
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// eat the '/' so we don't miscount a */ if we see /*/*
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--back;
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}
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if (chPrev == '*' && ch == '/') {
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commentNestingLevel--;
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// eat the '*' so we don't miscount a /* if we see */*/
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--back;
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}
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}
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--back;
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}
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}
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StyleContext sc(startPos, length, initStyle, styler, static_cast<unsigned char>(0xff));
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Sci_Position lineEndNext = styler.LineEnd(lineCurrent);
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for (; sc.More();) {
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if (sc.atLineStart) {
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visibleChars = 0;
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visibleChars1 = 0;
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}
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if (sc.atLineEnd) {
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lineCurrent++;
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lineEndNext = styler.LineEnd(lineCurrent);
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}
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// Handle line continuation generically.
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if (sc.ch == '~') {
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if (static_cast<Sci_Position>((sc.currentPos+1)) >= lineEndNext) {
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lineCurrent++;
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lineEndNext = styler.LineEnd(lineCurrent);
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sc.Forward();
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if (sc.ch == '\r' && sc.chNext == '\n') {
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sc.Forward();
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}
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continuationLine = true;
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sc.Forward();
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continue;
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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_ABL_OPERATOR:
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sc.SetState(SCE_ABL_DEFAULT);
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break;
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case SCE_ABL_NUMBER:
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// We accept almost anything because of hex. and maybe number suffixes and scientific notations in the future
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if (!(setWord.Contains(sc.ch)
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|| ((sc.ch == '+' || sc.ch == '-') && (sc.chPrev == 'e' || sc.chPrev == 'E' ||
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sc.chPrev == 'p' || sc.chPrev == 'P')))) {
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sc.SetState(SCE_ABL_DEFAULT);
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}
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break;
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case SCE_ABL_IDENTIFIER:
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if (sc.atLineStart || sc.atLineEnd || (!setWord.Contains(sc.ch) && sc.ch != '-')) {
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char s[1000];
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sc.GetCurrentLowered(s, sizeof(s));
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bool isLastWordEnd = (s[0] == 'e' && s[1] =='n' && s[2] == 'd' && !IsAlphaNumeric(s[3]) && s[3] != '-'); // helps to identify "end trigger" phrase
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if ((isSentenceStart && keywords2.InListAbbreviated (s,'(')) || (!isLastWordEnd && keywords3.InListAbbreviated (s,'('))) {
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sc.ChangeState(SCE_ABL_BLOCK);
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isSentenceStart = false;
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}
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else if (keywords1.InListAbbreviated (s,'(')) {
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if (isLastWordEnd ||
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(s[0] == 'f' && s[1] =='o' && s[2] == 'r' && s[3] == 'w' && s[4] =='a' && s[5] == 'r' && s[6] == 'd'&& !IsAlphaNumeric(s[7]))) {
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sc.ChangeState(SCE_ABL_END);
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isSentenceStart = false;
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}
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else if ((s[0] == 'e' && s[1] =='l' && s[2] == 's' && s[3] == 'e') ||
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(s[0] == 't' && s[1] =='h' && s[2] == 'e' && s[3] == 'n')) {
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sc.ChangeState(SCE_ABL_WORD);
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isSentenceStart = true;
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}
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else {
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sc.ChangeState(SCE_ABL_WORD);
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isSentenceStart = false;
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}
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}
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sc.SetState(SCE_ABL_DEFAULT);
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}
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break;
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case SCE_ABL_PREPROCESSOR:
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if (sc.atLineStart && !continuationLine) {
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sc.SetState(SCE_ABL_DEFAULT);
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// Force Scintilla to acknowledge changed stated even though this change might happen outside of the current line
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possibleOOLChange = true;
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isSentenceStart = true;
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}
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break;
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case SCE_ABL_LINECOMMENT:
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if (sc.atLineStart && !continuationLine) {
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sc.SetState(SCE_ABL_DEFAULT);
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isSentenceStart = true;
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} else {
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styleBeforeTaskMarker = SCE_ABL_LINECOMMENT;
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highlightTaskMarker(sc, styler, keywords4);
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}
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break;
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case SCE_ABL_TASKMARKER:
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if (isoperator(sc.ch) || IsASpace(sc.ch)) {
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sc.SetState(styleBeforeTaskMarker);
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styleBeforeTaskMarker = SCE_ABL_DEFAULT;
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}
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// fall through
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case SCE_ABL_COMMENT:
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if (sc.Match('*', '/')) {
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sc.Forward();
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commentNestingLevel--;
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if (commentNestingLevel == 0) {
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sc.ForwardSetState(SCE_ABL_DEFAULT);
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possibleOOLChange = true;
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}
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} else if (sc.Match('/', '*')) {
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commentNestingLevel++;
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sc.Forward();
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}
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if (commentNestingLevel > 0) {
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styleBeforeTaskMarker = SCE_ABL_COMMENT;
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possibleOOLChange = true;
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highlightTaskMarker(sc, styler, keywords4);
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}
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break;
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case SCE_ABL_STRING:
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if (sc.ch == '~') {
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sc.Forward(); // Skip a character after a tilde
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} else if (sc.ch == '\"') {
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sc.ForwardSetState(SCE_ABL_DEFAULT);
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}
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break;
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case SCE_ABL_CHARACTER:
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if (sc.ch == '~') {
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sc.Forward(); // Skip a character after a tilde
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} else if (sc.ch == '\'') {
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sc.ForwardSetState(SCE_ABL_DEFAULT);
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}
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break;
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}
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if (sc.atLineEnd && !atLineEndBeforeSwitch) {
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// State exit processing consumed characters up to end of line.
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lineCurrent++;
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lineEndNext = styler.LineEnd(lineCurrent);
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}
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// Determine if a new state should be entered.
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if (sc.state == SCE_ABL_DEFAULT) {
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if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
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sc.SetState(SCE_ABL_NUMBER);
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isSentenceStart = false;
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} else if (!sc.atLineEnd && (setWordStart.Contains(sc.ch)) && sc.chPrev != '&') {
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sc.SetState(SCE_ABL_IDENTIFIER);
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} else if (sc.Match('/', '*')) {
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if (sc.chPrev == '.' || sc.chPrev == ':' || sc.chPrev == '}') {
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isSentenceStart = true;
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}
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sc.SetState(SCE_ABL_COMMENT);
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possibleOOLChange = true;
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commentNestingLevel++;
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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.ch == '\"') {
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sc.SetState(SCE_ABL_STRING);
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isSentenceStart = false;
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} else if (sc.ch == '\'') {
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sc.SetState(SCE_ABL_CHARACTER);
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isSentenceStart = false;
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} else if (sc.ch == '&' && visibleChars1 == 0 && isSentenceStart) {
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// Preprocessor commands are alone on their line
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sc.SetState(SCE_ABL_PREPROCESSOR);
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// Force Scintilla to acknowledge changed stated even though this change might happen outside of the current line
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possibleOOLChange = true;
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// Skip whitespace between & and preprocessor word
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do {
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sc.Forward();
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} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
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if (sc.atLineEnd) {
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sc.SetState(SCE_ABL_DEFAULT);
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}
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} else if (sc.Match('/','/') && (IsASpace(sc.chPrev) || isSentenceStart)) {
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// Line comments are valid after a white space or EOL
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sc.SetState(SCE_ABL_LINECOMMENT);
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// Skip whitespace between // and preprocessor word
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do {
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sc.Forward();
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} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
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if (sc.atLineEnd) {
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sc.SetState(SCE_ABL_DEFAULT);
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}
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} else if (isoperator(sc.ch)) {
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sc.SetState(SCE_ABL_OPERATOR);
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/* This code allows highlight of handles. Alas, it would cause the phrase "last-event:function"
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to be recognized as a BlockBegin */
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isSentenceStart = false;
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}
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else if ((sc.chPrev == '.' || sc.chPrev == ':' || sc.chPrev == '}') && (IsASpace(sc.ch))) {
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isSentenceStart = true;
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}
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}
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if (!IsASpace(sc.ch)) {
|
|
visibleChars1++;
|
|
}
|
|
if (!IsASpace(sc.ch) && !IsSpaceEquiv(sc.state)) {
|
|
visibleChars++;
|
|
}
|
|
continuationLine = false;
|
|
sc.Forward();
|
|
}
|
|
if (possibleOOLChange)
|
|
styler.ChangeLexerState(startPos, startPos + length);
|
|
sc.Complete();
|
|
}
|
|
|
|
|
|
// 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 LexerABL::Fold(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) {
|
|
|
|
if (!options.fold)
|
|
return;
|
|
|
|
LexAccessor styler(pAccess);
|
|
|
|
Sci_PositionU endPos = startPos + length;
|
|
int visibleChars = 0;
|
|
Sci_Position lineCurrent = styler.GetLine(startPos);
|
|
int levelCurrent = SC_FOLDLEVELBASE;
|
|
if (lineCurrent > 0)
|
|
levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
|
|
Sci_PositionU lineStartNext = styler.LineStart(lineCurrent+1);
|
|
int levelNext = levelCurrent;
|
|
char chNext = styler[startPos];
|
|
int styleNext = styler.StyleAt(startPos);
|
|
int style = initStyle;
|
|
for (Sci_PositionU i = startPos; i < endPos; i++) {
|
|
chNext = static_cast<char>(tolower(chNext)); // check tolower
|
|
char ch = chNext;
|
|
chNext = styler.SafeGetCharAt(i+1);
|
|
int stylePrev = style;
|
|
style = styleNext;
|
|
styleNext = styler.StyleAt(i+1);
|
|
bool atEOL = i == (lineStartNext-1);
|
|
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.foldSyntaxBased) {
|
|
if (style == SCE_ABL_BLOCK && !IsAlphaNumeric(chNext)) {
|
|
levelNext++;
|
|
}
|
|
else if (style == SCE_ABL_END && (ch == 'e' || ch == 'f')) {
|
|
levelNext--;
|
|
}
|
|
}
|
|
if (!IsASpace(ch))
|
|
visibleChars++;
|
|
if (atEOL || (i == endPos-1)) {
|
|
int lev = levelCurrent | levelNext << 16;
|
|
if (visibleChars == 0 && options.foldCompact)
|
|
lev |= SC_FOLDLEVELWHITEFLAG;
|
|
if (levelCurrent < levelNext)
|
|
lev |= SC_FOLDLEVELHEADERFLAG;
|
|
if (lev != styler.LevelAt(lineCurrent)) {
|
|
styler.SetLevel(lineCurrent, lev);
|
|
}
|
|
lineCurrent++;
|
|
lineStartNext = styler.LineStart(lineCurrent+1);
|
|
levelCurrent = levelNext;
|
|
if (atEOL && (i == static_cast<Sci_PositionU>(styler.Length()-1))) {
|
|
// There is an empty line at end of file so give it same level and empty
|
|
styler.SetLevel(lineCurrent, (levelCurrent | levelCurrent << 16) | SC_FOLDLEVELWHITEFLAG);
|
|
}
|
|
visibleChars = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
LexerModule lmProgress(SCLEX_PROGRESS, LexerABL::LexerFactoryABL, "abl", ablWordLists);
|