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696 lines
26 KiB
696 lines
26 KiB
// 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, PDC 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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// The line state contains:
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// In SCE_VISUALPROLOG_STRING: The closing quote and information about verbatim string.
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// and a stack of nesting kinds: comment, embedded (syntax) and (syntax) place holder
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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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#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 <string_view>
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#include <vector>
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#include <map>
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#include <algorithm>
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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 "Accessor.h"
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#include "StyleContext.h"
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#include "CharacterSet.h"
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#include "CharacterCategory.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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namespace {
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// Options used for LexerVisualProlog
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struct OptionsVisualProlog {
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bool verbatimStrings;
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bool backQuotedStrings;
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OptionsVisualProlog() {
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verbatimStrings = true;
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backQuotedStrings = false;
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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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DefineProperty("lexer.visualprolog.verbatim.strings", &OptionsVisualProlog::verbatimStrings,
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"Set to 0 to disable highlighting verbatim strings using '@'.");
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DefineProperty("lexer.visualprolog.backquoted.strings", &OptionsVisualProlog::backQuotedStrings,
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"Set to 1 to enable using back quotes (``) to delimit strings.");
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DefineWordListSets(visualPrologWordLists);
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}
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};
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LexicalClass lexicalClasses[] = {
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SCE_VISUALPROLOG_DEFAULT, "SCE_VISUALPROLOG_DEFAULT", "default", "Default style",
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SCE_VISUALPROLOG_KEY_MAJOR, "SCE_VISUALPROLOG_KEY_MAJOR", "keyword major", "Major keyword",
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SCE_VISUALPROLOG_KEY_MINOR, "SCE_VISUALPROLOG_KEY_MINOR", "keyword minor", "Minor keyword",
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SCE_VISUALPROLOG_KEY_DIRECTIVE, "SCE_VISUALPROLOG_KEY_DIRECTIVE", "keyword preprocessor", "Directove keyword",
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SCE_VISUALPROLOG_COMMENT_BLOCK, "SCE_VISUALPROLOG_COMMENT_BLOCK", "comment", "Multiline comment /* */",
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SCE_VISUALPROLOG_COMMENT_LINE, "SCE_VISUALPROLOG_COMMENT_LINE", "comment line", "Line comment % ...",
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SCE_VISUALPROLOG_COMMENT_KEY, "SCE_VISUALPROLOG_COMMENT_KEY", "comment documentation keyword", "Doc keyword in comment % @short ...",
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SCE_VISUALPROLOG_COMMENT_KEY_ERROR, "SCE_VISUALPROLOG_COMMENT_KEY_ERROR", "comment", "A non recognized doc keyword % @qqq ...",
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SCE_VISUALPROLOG_IDENTIFIER, "SCE_VISUALPROLOG_IDENTIFIER", "identifier", "Identifier (black)",
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SCE_VISUALPROLOG_VARIABLE, "SCE_VISUALPROLOG_VARIABLE", "variable identifier", "Variable (green)",
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SCE_VISUALPROLOG_ANONYMOUS, "SCE_VISUALPROLOG_ANONYMOUS", "variable anonymous identifier", "Anonymous Variable _XXX (dimmed green)",
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SCE_VISUALPROLOG_NUMBER, "SCE_VISUALPROLOG_NUMBER", "numeric", "Number",
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SCE_VISUALPROLOG_OPERATOR, "SCE_VISUALPROLOG_OPERATOR", "operator", "Operator",
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SCE_VISUALPROLOG_STRING, "SCE_VISUALPROLOG_STRING", "literal string", "String literal",
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SCE_VISUALPROLOG_STRING_QUOTE, "SCE_VISUALPROLOG_STRING_QUOTE", "literal string quote", "Quotes surrounding string literals",
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SCE_VISUALPROLOG_STRING_ESCAPE, "SCE_VISUALPROLOG_STRING_ESCAPE", "literal string escapesequence", "Escape sequence in string literal",
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SCE_VISUALPROLOG_STRING_ESCAPE_ERROR, "SCE_VISUALPROLOG_STRING_ESCAPE_ERROR", "error literal string escapesequence", "Error in escape sequence in string literal",
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SCE_VISUALPROLOG_STRING_EOL, "SCE_VISUALPROLOG_STRING_EOL", "literal string multiline raw escapesequence", "Verbatim/multiline string literal EOL",
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SCE_VISUALPROLOG_EMBEDDED, "SCE_VISUALPROLOG_EMBEDDED", "literal string embedded", "Embedded syntax [| ... |]",
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SCE_VISUALPROLOG_PLACEHOLDER, "SCE_VISUALPROLOG_PLACEHOLDER", "operator embedded", "Syntax place holder {| ... |}:ident in embedded syntax"
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};
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LexicalClass getLexicalClass(int style) {
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for (auto lc : lexicalClasses) {
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if (style == lc.value) {
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return lc;
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}
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}
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return {style, "", "unused", ""};
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}
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class LexerVisualProlog : public DefaultLexer {
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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() : DefaultLexer("visualprolog", SCLEX_VISUALPROLOG) {
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}
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virtual ~LexerVisualProlog() {
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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 osVisualProlog.PropertyNames();
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}
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int SCI_METHOD PropertyType(const char* name) override {
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return osVisualProlog.PropertyType(name);
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}
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const char* SCI_METHOD DescribeProperty(const char* name) override {
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return osVisualProlog.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 osVisualProlog.PropertyGet(key);
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}
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const char* SCI_METHOD DescribeWordListSets() override {
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return osVisualProlog.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 NamedStyles() override {
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int namedStyles = 0;
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for (auto lc : lexicalClasses) {
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if (namedStyles < lc.value) {
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namedStyles = lc.value;
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}
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}
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return namedStyles;
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}
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const char* SCI_METHOD NameOfStyle(int style) override {
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return getLexicalClass(style).name;
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}
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const char* SCI_METHOD TagsOfStyle(int style) override {
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return getLexicalClass(style).tags;
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}
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const char* SCI_METHOD DescriptionOfStyle(int style) override {
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return getLexicalClass(style).description;
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}
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static ILexer5* LexerFactoryVisualProlog() {
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return new LexerVisualProlog();
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}
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};
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Sci_Position 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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Sci_Position 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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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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static bool isLowerLetter(int ch) {
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return ccLl == CategoriseCharacter(ch);
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}
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static bool isUpperLetter(int ch) {
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return ccLu == CategoriseCharacter(ch);
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}
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static bool isAlphaNum(int ch) {
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CharacterCategory cc = CategoriseCharacter(ch);
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return (ccLu == cc || ccLl == cc || ccLt == cc || ccLm == cc || ccLo == cc || ccNd == cc || ccNl == cc || ccNo == cc);
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}
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static bool isStringVerbatimOpenClose(int ch) {
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CharacterCategory cc = CategoriseCharacter(ch);
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return (ccPc <= cc && cc <= ccSo);
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}
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static bool isIdChar(int ch) {
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return ('_') == ch || isAlphaNum(ch);
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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, Sci_Position start) {
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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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Sci_Position i = 0;
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while (i < 100 && isLowerLetter(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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class lineState {
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public:
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bool verbatim = false;
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int closingQuote = 0;
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int kindStack = 0;
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bool isOpenStringVerbatim(int next) {
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if (next > 0x7FFF) {
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return false;
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}
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switch (next) {
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case L'<':
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closingQuote = L'>';
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return true;
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case L'>':
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closingQuote = L'<';
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return true;
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case L'(':
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closingQuote = L')';
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return true;
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case L')':
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closingQuote = L'(';
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return true;
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case L'[':
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closingQuote = L']';
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return true;
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case L']':
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closingQuote = L'[';
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return true;
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case L'{':
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closingQuote = L'}';
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return true;
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case L'}':
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closingQuote = L'{';
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return true;
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case L'_':
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case L'.':
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case L',':
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case L';':
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return false;
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default:
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if (isStringVerbatimOpenClose(next)) {
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closingQuote = next;
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return true;
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} else {
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return false;
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}
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}
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}
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enum kind {
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none = 0,
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comment = 1,
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embedded = 2,
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placeholder = 3
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};
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void setState(int state) {
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verbatim = state >> 31;
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closingQuote = state >> 16 & 0x7FFF;
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kindStack = state & 0xFFFF;
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}
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int getState() {
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return verbatim << 31 | closingQuote << 16 | (kindStack & 0xFFFF);
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}
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void enter(kind k) {
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kindStack = kindStack << 2 | k;
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}
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void leave(kind k) {
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if (k == currentKind()) {
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kindStack = kindStack >> 2;
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}
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}
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kind currentKind() {
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return static_cast<kind>(kindStack & 0x3);
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}
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kind stateKind2(int ks) {
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if (0 == ks) {
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return none;
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} else {
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kind k1 = stateKind2(ks >> 2);
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kind k2 = static_cast<kind>(ks & 0x3);
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if (embedded == k1 && k2 == comment) {
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return embedded;
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} else {
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return k2;
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}
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}
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}
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kind stateKind() {
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return stateKind2(kindStack);
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}
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};
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void SCI_METHOD LexerVisualProlog::Lex(Sci_PositionU startPos, Sci_Position 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 setNumber(CharacterSet::setNone, "0123456789abcdefABCDEFxoXO_");
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StyleContext sc(startPos, length, initStyle, styler, 0x7f);
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int styleBeforeDocKeyword = SCE_VISUALPROLOG_DEFAULT;
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lineState ls;
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if (sc.currentLine >= 1) {
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ls.setState(styler.GetLineState(sc.currentLine - 1));
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}
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bool newState = false;
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for (; sc.More(); sc.Forward()) {
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Sci_Position currentLineEntry = sc.currentLine;
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if (newState) {
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newState = false;
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int state;
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switch (ls.stateKind()) {
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case lineState::comment:
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state = SCE_VISUALPROLOG_COMMENT_BLOCK;
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break;
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case lineState::embedded:
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state = SCE_VISUALPROLOG_EMBEDDED;
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break;
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case lineState::placeholder:
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state = SCE_VISUALPROLOG_PLACEHOLDER;
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break;
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default:
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state = SCE_VISUALPROLOG_DEFAULT;
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break;
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}
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sc.SetState(state);
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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_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 (!(setNumber.Contains(sc.ch)) || (sc.Match('.') && IsADigit(sc.chNext))) {
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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 (!isIdChar(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);
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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 (!isIdChar(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 (!isLowerLetter(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_LINE:
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if (sc.MatchLineEnd()) {
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int nextState = (lineState::comment == ls.currentKind()) ? SCE_VISUALPROLOG_COMMENT_BLOCK : SCE_VISUALPROLOG_DEFAULT;
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sc.SetState(nextState);
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} else if (sc.Match('@')) {
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styleBeforeDocKeyword = SCE_VISUALPROLOG_COMMENT_LINE;
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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_BLOCK:
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if (sc.Match('*', '/')) {
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sc.Forward();
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ls.leave(lineState::comment);
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newState = true;
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} else if (sc.Match('/', '*')) {
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sc.Forward();
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ls.enter(lineState::comment);
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} else if (sc.Match('@')) {
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styleBeforeDocKeyword = SCE_VISUALPROLOG_COMMENT_BLOCK;
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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) || sc.MatchLineEnd()) {
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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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if (SCE_VISUALPROLOG_COMMENT_LINE == styleBeforeDocKeyword && sc.MatchLineEnd()) {
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// end line comment
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int nextState = (lineState::comment == ls.currentKind()) ? SCE_VISUALPROLOG_COMMENT_BLOCK : SCE_VISUALPROLOG_DEFAULT;
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sc.SetState(nextState);
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} else {
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sc.SetState(styleBeforeDocKeyword);
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if (SCE_VISUALPROLOG_COMMENT_BLOCK == styleBeforeDocKeyword && sc.Match('*', '/')) {
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// we have consumed the '*' if it comes immediately after the docKeyword
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sc.Forward();
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ls.leave(lineState::comment);
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newState = true;
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}
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}
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}
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break;
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case SCE_VISUALPROLOG_STRING_ESCAPE_ERROR:
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if (sc.atLineStart) {
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sc.SetState(SCE_VISUALPROLOG_DEFAULT);
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break;
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}
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[[fallthrough]];
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case SCE_VISUALPROLOG_STRING_ESCAPE:
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case SCE_VISUALPROLOG_STRING_QUOTE:
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case SCE_VISUALPROLOG_STRING_EOL:
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// return to SCE_VISUALPROLOG_STRING and treat as such (fallthrough)
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sc.SetState(SCE_VISUALPROLOG_STRING);
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[[fallthrough]];
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case SCE_VISUALPROLOG_STRING:
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if (sc.MatchLineEnd() | sc.atLineEnd) {
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if (ls.verbatim) {
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_EOL);
|
|
} else {
|
|
ls.closingQuote = 0;
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_ESCAPE_ERROR);
|
|
}
|
|
} else if (sc.Match(ls.closingQuote)) {
|
|
if (ls.verbatim && ls.closingQuote == sc.chNext) {
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_ESCAPE);
|
|
sc.Forward();
|
|
} else {
|
|
ls.closingQuote = 0;
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_QUOTE);
|
|
sc.ForwardSetState(SCE_VISUALPROLOG_DEFAULT);
|
|
}
|
|
} else if (!ls.verbatim && sc.Match('\\')) {
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_ESCAPE_ERROR);
|
|
sc.Forward();
|
|
if (sc.MatchLineEnd()) {
|
|
sc.ForwardSetState(SCE_VISUALPROLOG_DEFAULT);
|
|
} else {
|
|
if (sc.Match('"') || sc.Match('\'') || sc.Match('\\') || sc.Match('n') || sc.Match('l') || sc.Match('r') || sc.Match('t')) {
|
|
sc.ChangeState(SCE_VISUALPROLOG_STRING_ESCAPE);
|
|
} else if (sc.Match('u')) {
|
|
if (IsADigit(sc.chNext, 16)) {
|
|
sc.Forward();
|
|
if (IsADigit(sc.chNext, 16)) {
|
|
sc.Forward();
|
|
if (IsADigit(sc.chNext, 16)) {
|
|
sc.Forward();
|
|
if (IsADigit(sc.chNext, 16)) {
|
|
sc.Forward();
|
|
sc.ChangeState(SCE_VISUALPROLOG_STRING_ESCAPE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case SCE_VISUALPROLOG_EMBEDDED:
|
|
if (sc.Match('|', ']')) {
|
|
sc.Forward();
|
|
ls.leave(lineState::embedded);
|
|
newState = true;
|
|
} else if (sc.Match('[', '|')) {
|
|
sc.Forward();
|
|
ls.enter(lineState::embedded);
|
|
} else if (sc.Match('{', '|') && lineState::comment != ls.currentKind()) {
|
|
sc.SetState(SCE_VISUALPROLOG_DEFAULT);
|
|
} else if (sc.Match('/', '*')) {
|
|
sc.Forward();
|
|
ls.enter(lineState::comment);
|
|
} else if (sc.Match('*', '/')) {
|
|
sc.Forward();
|
|
ls.leave(lineState::comment);
|
|
newState = true;
|
|
}
|
|
break;
|
|
case SCE_VISUALPROLOG_PLACEHOLDER:
|
|
if (lineState::embedded == ls.currentKind()) {
|
|
sc.SetState(SCE_VISUALPROLOG_EMBEDDED);
|
|
} else {
|
|
sc.SetState(SCE_VISUALPROLOG_DEFAULT);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (currentLineEntry != sc.currentLine) {
|
|
styler.SetLineState(currentLineEntry, ls.getState());
|
|
}
|
|
if (sc.MatchLineEnd() | sc.atLineEnd) {
|
|
if (sc.More()) { // currentLine can be outside the document
|
|
styler.SetLineState(sc.currentLine, ls.getState());
|
|
}
|
|
}
|
|
|
|
// Determine if a new state should be entered.
|
|
if (sc.state == SCE_VISUALPROLOG_DEFAULT) {
|
|
if (options.verbatimStrings && sc.Match('@') && ls.isOpenStringVerbatim(sc.chNext)) {
|
|
ls.verbatim = true;
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_QUOTE);
|
|
sc.Forward();
|
|
} else if (IsADigit(sc.ch) || (sc.Match('.') && IsADigit(sc.chNext))) {
|
|
sc.SetState(SCE_VISUALPROLOG_NUMBER);
|
|
} else if (isLowerLetter(sc.ch)) {
|
|
sc.SetState(SCE_VISUALPROLOG_IDENTIFIER);
|
|
} else if (isUpperLetter(sc.ch)) {
|
|
sc.SetState(SCE_VISUALPROLOG_VARIABLE);
|
|
} else if (sc.Match('_')) {
|
|
sc.SetState(SCE_VISUALPROLOG_ANONYMOUS);
|
|
} else if (sc.Match('/', '*')) {
|
|
sc.SetState(SCE_VISUALPROLOG_COMMENT_BLOCK);
|
|
ls.enter(lineState::comment);
|
|
sc.Forward();
|
|
} else if (sc.Match('%')) {
|
|
sc.SetState(SCE_VISUALPROLOG_COMMENT_LINE);
|
|
} else if (sc.Match('[', '|')) {
|
|
sc.SetState(SCE_VISUALPROLOG_EMBEDDED);
|
|
ls.enter(lineState::embedded);
|
|
sc.Forward();
|
|
} else if (sc.Match('{', '|')) {
|
|
sc.SetState(SCE_VISUALPROLOG_PLACEHOLDER);
|
|
ls.enter(lineState::placeholder);
|
|
sc.Forward();
|
|
} else if (sc.Match('|', '}')) {
|
|
sc.SetState(SCE_VISUALPROLOG_PLACEHOLDER);
|
|
sc.Forward();
|
|
if (':' == sc.chNext) {
|
|
sc.Forward();
|
|
for (; isIdChar(sc.chNext); sc.Forward()) {
|
|
}
|
|
}
|
|
ls.leave(lineState::placeholder);
|
|
newState = true;
|
|
} else if (sc.Match('\'')) {
|
|
ls.verbatim = false;
|
|
ls.closingQuote = '\'';
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_QUOTE);
|
|
} else if (sc.Match('"')) {
|
|
ls.verbatim = false;
|
|
ls.closingQuote = '"';
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_QUOTE);
|
|
} else if (options.backQuotedStrings && sc.Match('`')) {
|
|
ls.verbatim = false;
|
|
ls.closingQuote = '`';
|
|
sc.SetState(SCE_VISUALPROLOG_STRING_QUOTE);
|
|
} else if (sc.Match('#')) {
|
|
sc.SetState(SCE_VISUALPROLOG_KEY_DIRECTIVE);
|
|
} else if (isoperator(static_cast<char>(sc.ch)) || sc.Match('\\') ||
|
|
(!options.verbatimStrings && sc.Match('@'))) {
|
|
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 {".
|
|
|
|
#if defined(__clang__)
|
|
#if __has_warning("-Wunused-but-set-variable")
|
|
// Disable warning for visibleChars
|
|
#pragma clang diagnostic ignored "-Wunused-but-set-variable"
|
|
#endif
|
|
#endif
|
|
|
|
void SCI_METHOD LexerVisualProlog::Fold(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument* pAccess) {
|
|
|
|
LexAccessor styler(pAccess);
|
|
|
|
Sci_PositionU endPos = startPos + length;
|
|
int visibleChars = 0;
|
|
Sci_Position 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 (Sci_PositionU 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<Sci_PositionU>(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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
extern const LexerModule lmVisualProlog(SCLEX_VISUALPROLOG, LexerVisualProlog::LexerFactoryVisualProlog, "visualprolog", visualPrologWordLists);
|