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https://github.com/aNNiMON/Own-Programming-Language-Tutorial.git
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Добавлен beautifier
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Victor
parent
d2a159bb45
commit
66415a6c31
@ -1,6 +1,7 @@
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package com.annimon.ownlang;
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import com.annimon.ownlang.exceptions.LexerException;
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import com.annimon.ownlang.parser.Beautifier;
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import com.annimon.ownlang.parser.Lexer;
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import com.annimon.ownlang.parser.Parser;
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import com.annimon.ownlang.parser.SourceLoader;
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@ -38,6 +39,7 @@ public final class Main {
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}
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boolean showTokens = false, showAst = false, showMeasurements = false;
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boolean beautifyMode = false;
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String input = null;
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for (int i = 0; i < args.length; i++) {
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switch (args[i]) {
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@ -45,6 +47,11 @@ public final class Main {
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case "--showast":
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showAst = true;
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break;
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case "-b":
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case "--beautify":
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beautifyMode = true;
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break;
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case "-t":
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case "--showtokens":
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@ -76,6 +83,10 @@ public final class Main {
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if (input == null) {
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throw new IllegalArgumentException("Empty input");
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}
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if (beautifyMode) {
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System.out.println(Beautifier.beautify(input));
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return;
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}
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run(input, showTokens, showAst, showMeasurements);
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}
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286
src/com/annimon/ownlang/parser/Beautifier.java
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286
src/com/annimon/ownlang/parser/Beautifier.java
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@ -0,0 +1,286 @@
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package com.annimon.ownlang.parser;
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import java.util.HashMap;
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import java.util.Map;
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/**
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*
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* @author aNNiMON
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*/
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public final class Beautifier {
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public static String beautify(String input) {
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return new Beautifier(input).beautify();
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}
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private enum OperatorMode {
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SPACES, RSPACES, TRIM, RTRIM, AS_SOURCE,
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}
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private static final String OPERATOR_CHARS = "+-*/%()[]=<>!&|.,^~?:";
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private static final Map<String, OperatorMode> OPERATORS;
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static {
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OPERATORS = new HashMap<>();
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OPERATORS.put("+", OperatorMode.SPACES);
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OPERATORS.put("-", OperatorMode.SPACES);
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OPERATORS.put("*", OperatorMode.SPACES);
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OPERATORS.put("/", OperatorMode.SPACES);
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OPERATORS.put("%", OperatorMode.SPACES);
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OPERATORS.put("(", OperatorMode.AS_SOURCE);
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OPERATORS.put(")", OperatorMode.AS_SOURCE);
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OPERATORS.put("[", OperatorMode.AS_SOURCE);
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OPERATORS.put("]", OperatorMode.AS_SOURCE);
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OPERATORS.put("=", OperatorMode.SPACES);
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OPERATORS.put("<", OperatorMode.SPACES);
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OPERATORS.put(">", OperatorMode.SPACES);
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OPERATORS.put(".", OperatorMode.TRIM);
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OPERATORS.put(",", OperatorMode.RSPACES);
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OPERATORS.put("^", OperatorMode.SPACES);
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OPERATORS.put("~", OperatorMode.RTRIM);
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OPERATORS.put("?", OperatorMode.SPACES);
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OPERATORS.put(":", OperatorMode.SPACES);
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OPERATORS.put("!", OperatorMode.RTRIM);
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OPERATORS.put("&", OperatorMode.SPACES);
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OPERATORS.put("|", OperatorMode.SPACES);
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OPERATORS.put("==", OperatorMode.SPACES);
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OPERATORS.put("!=", OperatorMode.SPACES);
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OPERATORS.put("<=", OperatorMode.SPACES);
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OPERATORS.put(">=", OperatorMode.SPACES);
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OPERATORS.put("+=", OperatorMode.SPACES);
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OPERATORS.put("-=", OperatorMode.SPACES);
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OPERATORS.put("*=", OperatorMode.SPACES);
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OPERATORS.put("/=", OperatorMode.SPACES);
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OPERATORS.put("%=", OperatorMode.SPACES);
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OPERATORS.put("&=", OperatorMode.SPACES);
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OPERATORS.put("^=", OperatorMode.SPACES);
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OPERATORS.put("|=", OperatorMode.SPACES);
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OPERATORS.put("::=", OperatorMode.SPACES);
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OPERATORS.put("<<=", OperatorMode.SPACES);
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OPERATORS.put(">>=", OperatorMode.SPACES);
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OPERATORS.put(">>>=", OperatorMode.SPACES);
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OPERATORS.put("++", OperatorMode.AS_SOURCE);
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OPERATORS.put("--", OperatorMode.AS_SOURCE);
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OPERATORS.put("::", OperatorMode.AS_SOURCE);
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OPERATORS.put("&&", OperatorMode.SPACES);
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OPERATORS.put("||", OperatorMode.SPACES);
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OPERATORS.put("<<", OperatorMode.SPACES);
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OPERATORS.put(">>", OperatorMode.SPACES);
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OPERATORS.put(">>>", OperatorMode.SPACES);
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}
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private final String input;
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private final int length;
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private final StringBuilder beautifiedCode, buffer;
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private int pos;
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private int indentLevel;
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public Beautifier(String input) {
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this.input = input;
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length = input.length();
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beautifiedCode = new StringBuilder();
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buffer = new StringBuilder();
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indentLevel = 0;
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}
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public String beautify() {
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while (pos < length) {
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final char current = peek(0);
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if (current == '"') processText();
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else if (current == '`') processExtendedWord();
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else if (OPERATOR_CHARS.indexOf(current) != -1) {
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processOperator();
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} else switch (current) {
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case '{':
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indentLevel += 2;
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addSpaceToLeft();
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beautifiedCode.append(current);
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newLineStrict();
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break;
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case '}':
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indentLevel -= 2;
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trimLeft();
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addToLeft('\n');
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indent();
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beautifiedCode.append(current);
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newLineStrict();
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break;
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case '\n':
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newLineStrict();
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break;
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default:
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beautifiedCode.append(current);
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next();
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break;
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}
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}
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return beautifiedCode.toString();
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}
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private void processText() {
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int index = pos + 1;
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while ((index = 1 + input.indexOf('"', index)) != -1) {
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if (input.charAt(index - 1) != '\\') {
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skipTo(index);
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return;
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}
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}
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}
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private void processExtendedWord() {
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skipTo("`");
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}
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private void processComment() {
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skipTo("\n");
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}
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private void processMultilineComment() {
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skipTo("*/");
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newLineStrict();
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pos--;
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}
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private void processOperator() {
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char current = peek(0);
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if (current == '/') {
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if (peek(1) == '/') {
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processComment();
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return;
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} else if (peek(1) == '*') {
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processMultilineComment();
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return;
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}
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}
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clearBuffer();
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while (true) {
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final String text = buffer.toString();
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if (!OPERATORS.containsKey(text + current) && !text.isEmpty()) {
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final OperatorMode mode = OPERATORS.get(text);
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switch (mode) {
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case SPACES:
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addSpaceToLeft();
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beautifiedCode.append(buffer);
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addSpaceToRight();
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break;
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case RSPACES:
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beautifiedCode.append(buffer);
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addSpaceToRight();
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break;
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case AS_SOURCE:
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beautifiedCode.append(buffer);
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break;
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case RTRIM:
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beautifiedCode.append(buffer);
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trimRight();
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break;
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case TRIM:
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trimLeft();
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beautifiedCode.append(buffer);
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trimRight();
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break;
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}
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return;
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}
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buffer.append(current);
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current = next();
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}
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}
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private void trimLeft() {
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while (isSpace(last())) {
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beautifiedCode.setLength(beautifiedCode.length() - 1);
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}
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}
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private void trimRight() {
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while (isSpace(peek(0))) {
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next();
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}
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}
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private void addSpaceToLeft() {
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addToLeft(' ');
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}
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private void addSpaceToRight() {
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if (peek(0) != ' ') {
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beautifiedCode.append(' ');
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}
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}
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private void addToLeft(char ch) {
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if (last() != ch) {
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beautifiedCode.append(ch);
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}
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}
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private boolean isSpace(char ch) {
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return " ".indexOf(ch) != -1;
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}
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private void newLineStrict() {
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beautifiedCode.append(System.lineSeparator());
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indent();
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do {
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next();
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} while (Character.isWhitespace(peek(0)));
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}
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private void indent() {
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indent(indentLevel);
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}
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private void indent(int count) {
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for (int i = 0; i < count; i++) {
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beautifiedCode.append(' ');
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}
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}
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private void skipTo(String text) {
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int index = input.indexOf(text, pos);
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if (index == -1) {
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index = length - 1;
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} else {
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index += text.length();
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}
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skipTo(index);
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}
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private void skipTo(int position) {
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beautifiedCode.append(input.substring(pos, position));
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pos += (position - pos);
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}
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private char last() {
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return beautifiedCode.charAt(beautifiedCode.length() - 1);
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}
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private void clearBuffer() {
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buffer.setLength(0);
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}
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private char next() {
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pos++;
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return peek(0);
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}
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private char peek(int relativePosition) {
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final int position = pos + relativePosition;
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if (position >= length) return '\0';
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return input.charAt(position);
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}
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}
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