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Language Server Protocol implementation for 1C (BSL) - 1C:Enterprise 8 and OneScript languages.
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/*
* This file is a part of BSL Language Server.
*
* Copyright (c) 2018-2024
* Alexey Sosnoviy , Nikita Fedkin and contributors
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*
* BSL Language Server is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3.0 of the License, or (at your option) any later version.
*
* BSL Language Server is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with BSL Language Server.
*/
package com.github._1c_syntax.bsl.languageserver.utils;
import com.github._1c_syntax.bsl.languageserver.context.symbol.ModuleSymbol;
import com.github._1c_syntax.bsl.parser.BSLLexer;
import lombok.experimental.UtilityClass;
import org.antlr.v4.runtime.ParserRuleContext;
import org.antlr.v4.runtime.Token;
import org.antlr.v4.runtime.tree.ParseTree;
import org.antlr.v4.runtime.tree.TerminalNode;
import org.eclipse.lsp4j.Position;
import org.eclipse.lsp4j.Range;
import java.util.Collection;
import java.util.List;
import java.util.Optional;
/**
* Набор методов для удобства работы с областями текста (ренджами)
*/
@UtilityClass
public final class Ranges {
/**
* Проверяет переданную область на пустоту
*
* @param range Проверяемая область
* @return Признак пустоты
*/
public boolean isEmpty(Range range) {
return create().equals(range);
}
public Range create() {
return create(0, 0, 0, 0);
}
public Range create(int startLine, int startChar, int endLine, int endChar) {
return new Range(new Position(startLine, startChar), new Position(endLine, endChar));
}
/**
* Создание Range для линии
*
* @param lineNo - номер строки
* @param startChar - номер первого символа
* @param endChar - номер последнего символа
* @return - полученный Range
*/
public Range create(int lineNo, int startChar, int endChar) {
return new Range(new Position(lineNo, startChar), new Position(lineNo, endChar));
}
public Range create(ParserRuleContext ruleContext) {
return create(ruleContext.getStart(), ruleContext.getStop());
}
public Range create(ParserRuleContext startCtx, ParserRuleContext endCtx) {
return create(startCtx.getStart(), endCtx.getStop());
}
public Range create(Token startToken, Token endToken) {
int startLine = startToken.getLine() - 1;
int startChar = startToken.getCharPositionInLine();
var tokenToCalculateEnd = endToken == null ? startToken : endToken;
int endLine = tokenToCalculateEnd.getLine() - 1;
int endChar;
if (tokenToCalculateEnd.getType() == Token.EOF) {
endChar = tokenToCalculateEnd.getCharPositionInLine();
} else {
endChar = tokenToCalculateEnd.getCharPositionInLine() + tokenToCalculateEnd.getText().length();
}
return create(startLine, startChar, endLine, endChar);
}
public Range create(List tokens) {
if (tokens.isEmpty()) {
return Ranges.create();
}
var firstElement = tokens.get(0);
var lastElement = tokens.get(tokens.size() - 1);
return Ranges.create(firstElement, lastElement);
}
public Range create(TerminalNode terminalNode) {
return create(terminalNode.getSymbol());
}
public Range create(TerminalNode startTerminalNode, TerminalNode stopTerminalNode) {
return create(startTerminalNode.getSymbol(), stopTerminalNode.getSymbol());
}
public Range create(Token token) {
int startLine = token.getLine() - 1;
int startChar = token.getCharPositionInLine();
int endLine = token.getLine() - 1;
int endChar = token.getCharPositionInLine() + token.getText().length();
return create(startLine, startChar, endLine, endChar);
}
/**
* Создание Range для узла дерева разбора.
*
* @param tree - дерево разбора.
* @return - полученный Range.
*/
public Range create(ParseTree tree) {
if (tree instanceof TerminalNode) {
return Ranges.create((TerminalNode) tree);
} else if (tree instanceof Token) {
return Ranges.create((Token) tree);
} else if (tree instanceof ParserRuleContext) {
return Ranges.create((ParserRuleContext) tree);
} else {
throw new IllegalArgumentException();
}
}
public boolean containsRange(Range bigger, Range smaller) {
return org.eclipse.lsp4j.util.Ranges.containsRange(bigger, smaller);
}
public boolean containsPosition(Range range, Position position) {
return org.eclipse.lsp4j.util.Ranges.containsPosition(range, position);
}
/**
* Натуральный порядок сравнения Range
*
* @param o1 - левый\меньший операнд
* @param o2 - правый\больший операнд
* @return 0 - равно, 1 - больше, -1 - меньше
*/
public int compare(Range o1, Range o2) {
if (o1.equals(o2)){
return 0;
}
final var startCompare = compare(o1.getStart(), o2.getStart());
if (startCompare != 0){
return startCompare;
}
return compare(o1.getEnd(), o2.getEnd());
}
/**
* Натуральный порядок сравнения Position
*
* @param pos1 - левый\меньший операнд
* @param pos2 - правый\больший операнд
* @return 0 - равно, 1 - больше, -1 - меньше
*/
public int compare(Position pos1, Position pos2) {
if (pos1.equals(pos2)){
return 0;
}
// 1,1 10,10
if (pos1.getLine() < pos2.getLine()) {
return -1;
}
// 10,10 1,1
if (pos1.getLine() > pos2.getLine()) {
return 1;
}
// 1,4 1,9
return Integer.compare(pos1.getCharacter(), pos2.getCharacter());
// 1,9 1,4
}
/**
* @deprecated Для совместимости метод оставлен, но будет удален в будущих версиях.
* Вместо него стоит использовать метод {@link ModuleSymbol#getSelectionRange()}
*/
@Deprecated(since = "0.20")
public Optional getFirstSignificantTokenRange(Collection tokens) {
return tokens.stream()
.filter(token -> token.getType() != Token.EOF)
.filter(token -> token.getType() != BSLLexer.WHITE_SPACE)
.map(Ranges::create)
.filter(range -> (!range.getStart().equals(range.getEnd())))
.findFirst();
}
}
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