增加语法高亮
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@ -1,18 +1,38 @@
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package org.jcnc.jnotepad.ui.module;
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import javafx.application.Platform;
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import javafx.geometry.Insets;
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import javafx.scene.control.ContextMenu;
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import javafx.scene.control.MenuItem;
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import javafx.scene.input.KeyCode;
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import javafx.scene.input.KeyEvent;
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import org.fxmisc.richtext.CodeArea;
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import org.fxmisc.richtext.GenericStyledArea;
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import org.fxmisc.richtext.LineNumberFactory;
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import org.fxmisc.richtext.StyleClassedTextArea;
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import org.fxmisc.richtext.model.Paragraph;
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import org.fxmisc.richtext.model.StyleSpans;
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import org.fxmisc.richtext.model.StyleSpansBuilder;
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import org.jcnc.jnotepad.util.LogUtil;
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import org.jcnc.jnotepad.views.manager.BottomStatusBoxManager;
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import org.jcnc.jnotepad.views.manager.CenterTabPaneManager;
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import org.jcnc.jnotepad.views.root.center.main.center.tab.CenterTab;
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import org.reactfx.Subscription;
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import org.reactfx.collection.ListModification;
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import org.slf4j.Logger;
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import java.io.BufferedWriter;
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import java.io.File;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.time.Duration;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Objects;
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import java.util.function.Consumer;
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import java.util.function.Function;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* 行号文本区域
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@ -21,8 +41,41 @@ import java.io.IOException;
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*
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* @author luke
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*/
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public class LineNumberTextArea extends StyleClassedTextArea {
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public class LineNumberTextArea extends CodeArea {
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private static final String[] KEYWORDS = new String[]{
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"abstract", "assert", "boolean", "break", "byte",
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"case", "catch", "char", "class", "const",
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"continue", "default", "do", "double", "else",
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"enum", "extends", "final", "finally", "float",
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"for", "goto", "if", "implements", "import",
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"instanceof", "int", "interface", "long", "native",
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"new", "package", "private", "protected", "public",
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"return", "short", "static", "strictfp", "super",
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"switch", "synchronized", "this", "throw", "throws",
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"transient", "try", "void", "volatile", "while"
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};
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// 定义用于匹配关键字、括号、分号、字符串和注释的正则表达式模式
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private static final String KEYWORD_PATTERN = "\\b(" + String.join("|", KEYWORDS) + ")\\b";
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private static final String PAREN_PATTERN = "\\(|\\)";
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private static final String BRACE_PATTERN = "\\{|\\}";
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private static final String BRACKET_PATTERN = "\\[|\\]";
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private static final String SEMICOLON_PATTERN = "\\;";
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private static final String STRING_PATTERN = "\"([^\"\\\\]|\\\\.)*\"";
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private static final String COMMENT_PATTERN = "//[^\n]*" + "|" + "/\\*(.|\\R)*?\\*/" // 用于整体文本处理（文本块）
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+ "|" + "/\\*[^\\v]*" + "|" + "^\\h*\\*([^\\v]*|/)"; // 用于可见段落处理（逐行）
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// 使用正则表达式将关键字、括号、分号、字符串和注释的模式组合成一个复合模式
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private static final Pattern PATTERN = Pattern.compile(
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"(?<KEYWORD>" + KEYWORD_PATTERN + ")"
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+ "|(?<PAREN>" + PAREN_PATTERN + ")"
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+ "|(?<BRACE>" + BRACE_PATTERN + ")"
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+ "|(?<BRACKET>" + BRACKET_PATTERN + ")"
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+ "|(?<SEMICOLON>" + SEMICOLON_PATTERN + ")"
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+ "|(?<STRING>" + STRING_PATTERN + ")"
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+ "|(?<COMMENT>" + COMMENT_PATTERN + ")"
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);
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/**
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* 用于记录日志的静态Logger对象
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@ -35,14 +88,142 @@ public class LineNumberTextArea extends StyleClassedTextArea {
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* 用于创建 LineNumberTextArea 对象
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*/
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public LineNumberTextArea() {
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//上、右、下、左
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setPadding(new Insets(8, 0, 0, 0));
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setStyle("-fx-font-family: 'Courier New';");
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// 设置 LineNumberTextArea 的样式，包括边框和背景颜色
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getStyleClass().add("line-number-text-area");
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this.setParagraphGraphicFactory(LineNumberFactory.get(this));
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initListeners();
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// 上、右、下、左
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this.setPadding(new Insets(8, 0, 0, 0));
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// 在区域左侧添加行号
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this.setParagraphGraphicFactory(LineNumberFactory.get(this));
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this.setContextMenu(new DefaultContextMenu());
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// 重新计算所有文本的语法高亮，用户停止编辑区域后的500毫秒内
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Subscription cleanupWhenNoLongerNeedIt = this
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.multiPlainChanges()
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.successionEnds(Duration.ofMillis(500))
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.subscribe(ignore -> this.setStyleSpans(0, computeHighlighting(this.getText())));
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this.getVisibleParagraphs().addModificationObserver
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(
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new JavaKeywordsDemo.VisibleParagraphStyler<>(this, this::computeHighlighting)
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);
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// 自动缩进：在按下回车键时插入上一行的缩进
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final Pattern whiteSpace = Pattern.compile("^\\s+");
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this.addEventHandler(KeyEvent.KEY_PRESSED, kE ->
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{
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if (kE.getCode() == KeyCode.ENTER) {
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int caretPosition = this.getCaretPosition();
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int currentParagraph = this.getCurrentParagraph();
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Matcher m0 = whiteSpace.matcher(this.getParagraph(currentParagraph - 1).getSegments().get(0));
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if (m0.find()) {
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Platform.runLater(() -> this.insertText(caretPosition, m0.group()));
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}
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}
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});
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initListeners();
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this.getStylesheets().add(Objects.requireNonNull(getClass().getResource("/css/java_code_styles.css")).toString());
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}
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private StyleSpans<Collection<String>> computeHighlighting(String text) {
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Matcher matcher = PATTERN.matcher(text);
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int lastKwEnd = 0;
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StyleSpansBuilder<Collection<String>> spansBuilder
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= new StyleSpansBuilder<>();
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while (matcher.find()) {
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String styleClass =
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matcher.group("KEYWORD") != null ? "keyword" :
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matcher.group("PAREN") != null ? "paren" :
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matcher.group("BRACE") != null ? "brace" :
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matcher.group("BRACKET") != null ? "bracket" :
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matcher.group("SEMICOLON") != null ? "semicolon" :
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matcher.group("STRING") != null ? "string" :
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matcher.group("COMMENT") != null ? "comment" :
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null; /* 永远不会发生 */
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assert styleClass != null;
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spansBuilder.add(Collections.emptyList(), matcher.start() - lastKwEnd);
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spansBuilder.add(Collections.singleton(styleClass), matcher.end() - matcher.start());
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lastKwEnd = matcher.end();
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}
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spansBuilder.add(Collections.emptyList(), text.length() - lastKwEnd);
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return spansBuilder.create();
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}
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static class VisibleParagraphStyler<PS, SEG, S> implements Consumer<ListModification<? extends Paragraph<PS, SEG, S>>> {
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private final GenericStyledArea<PS, SEG, S> area;
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private final Function<String, StyleSpans<S>> computeStyles;
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private int prevParagraph, prevTextLength;
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public VisibleParagraphStyler(GenericStyledArea<PS, SEG, S> area, Function<String, StyleSpans<S>> computeStyles) {
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this.computeStyles = computeStyles;
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this.area = area;
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}
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@Override
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public void accept(ListModification<? extends Paragraph<PS, SEG, S>> lm) {
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if (lm.getAddedSize() > 0) {
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Platform.runLater(() ->
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{
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int paragraph = Math.min(area.firstVisibleParToAllParIndex() + lm.getFrom(), area.getParagraphs().size() - 1);
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String text = area.getText(paragraph, 0, paragraph, area.getParagraphLength(paragraph));
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if (paragraph != prevParagraph || text.length() != prevTextLength) {
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if (paragraph < area.getParagraphs().size() - 1) {
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int startPos = area.getAbsolutePosition(paragraph, 0);
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area.setStyleSpans(startPos, computeStyles.apply(text));
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}
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prevTextLength = text.length();
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prevParagraph = paragraph;
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}
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});
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}
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}
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}
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private class DefaultContextMenu extends ContextMenu {
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private MenuItem fold, unfold, print;
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public DefaultContextMenu() {
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fold = new MenuItem("折叠所选文本");
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fold.setOnAction(AE -> {
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hide();
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fold();
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});
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unfold = new MenuItem("从光标处展开");
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unfold.setOnAction(AE -> {
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hide();
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unfold();
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});
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print = new MenuItem("打印");
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print.setOnAction(AE -> {
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hide();
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print();
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});
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getItems().addAll(fold, unfold, print);
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}
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/**
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* 折叠多行所选文本，仅显示第一行并隐藏其余部分。
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*/
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private void fold() {
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((CodeArea) getOwnerNode()).foldSelectedParagraphs();
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}
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/**
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* 展开当前行/段落（如果有折叠）。
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*/
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private void unfold() {
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CodeArea area = (CodeArea) getOwnerNode();
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area.unfoldParagraphs(area.getCurrentParagraph());
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}
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private void print() {
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System.out.println(((CodeArea) getOwnerNode()).getText());
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}
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}
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/**
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// 记录保存操作的日志信息
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LogUtil.getLogger(this.getClass()).info("正在自动保存---");
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} catch (IOException ignored) {
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// 如果发生IO异常，记录忽略的日志信息，但不中断程序执行
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// 如果发生IO异常，记录忽视的日志信息，但不中断程序执行
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LogUtil.getLogger(this.getClass()).info("已忽视IO异常!");
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}
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}
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}
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}
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27
src/main/resources/css/java_code_styles.css
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27
src/main/resources/css/java_code_styles.css
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.keyword {
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-fx-fill: purple;
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-fx-font-weight: bold;
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}
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.semicolon {
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-fx-font-weight: bold;
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}
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.paren {
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-fx-fill: firebrick;
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-fx-font-weight: bold;
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}
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.bracket {
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-fx-fill: darkgreen;
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-fx-font-weight: bold;
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}
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.brace {
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-fx-fill: teal;
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-fx-font-weight: bold;
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}
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.string {
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-fx-fill: blue;
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}
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.comment {
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-fx-fill: cadetblue;
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}
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