增加语法高亮
This commit is contained in:
parent
c537fa5046
commit
03f663deba
@ -1,18 +1,38 @@
|
||||
package org.jcnc.jnotepad.ui.module;
|
||||
|
||||
import javafx.application.Platform;
|
||||
import javafx.geometry.Insets;
|
||||
import javafx.scene.control.ContextMenu;
|
||||
import javafx.scene.control.MenuItem;
|
||||
import javafx.scene.input.KeyCode;
|
||||
import javafx.scene.input.KeyEvent;
|
||||
import org.fxmisc.richtext.CodeArea;
|
||||
import org.fxmisc.richtext.GenericStyledArea;
|
||||
import org.fxmisc.richtext.LineNumberFactory;
|
||||
import org.fxmisc.richtext.StyleClassedTextArea;
|
||||
import org.fxmisc.richtext.model.Paragraph;
|
||||
import org.fxmisc.richtext.model.StyleSpans;
|
||||
import org.fxmisc.richtext.model.StyleSpansBuilder;
|
||||
import org.jcnc.jnotepad.util.LogUtil;
|
||||
import org.jcnc.jnotepad.views.manager.BottomStatusBoxManager;
|
||||
import org.jcnc.jnotepad.views.manager.CenterTabPaneManager;
|
||||
import org.jcnc.jnotepad.views.root.center.main.center.tab.CenterTab;
|
||||
import org.reactfx.Subscription;
|
||||
import org.reactfx.collection.ListModification;
|
||||
import org.slf4j.Logger;
|
||||
|
||||
import java.io.BufferedWriter;
|
||||
import java.io.File;
|
||||
import java.io.FileWriter;
|
||||
import java.io.IOException;
|
||||
import java.time.Duration;
|
||||
import java.util.Collection;
|
||||
import java.util.Collections;
|
||||
import java.util.Objects;
|
||||
import java.util.function.Consumer;
|
||||
import java.util.function.Function;
|
||||
import java.util.regex.Matcher;
|
||||
import java.util.regex.Pattern;
|
||||
|
||||
/**
|
||||
* 行号文本区域
|
||||
@ -21,8 +41,41 @@ import java.io.IOException;
|
||||
*
|
||||
* @author luke
|
||||
*/
|
||||
public class LineNumberTextArea extends StyleClassedTextArea {
|
||||
public class LineNumberTextArea extends CodeArea {
|
||||
|
||||
private static final String[] KEYWORDS = new String[]{
|
||||
"abstract", "assert", "boolean", "break", "byte",
|
||||
"case", "catch", "char", "class", "const",
|
||||
"continue", "default", "do", "double", "else",
|
||||
"enum", "extends", "final", "finally", "float",
|
||||
"for", "goto", "if", "implements", "import",
|
||||
"instanceof", "int", "interface", "long", "native",
|
||||
"new", "package", "private", "protected", "public",
|
||||
"return", "short", "static", "strictfp", "super",
|
||||
"switch", "synchronized", "this", "throw", "throws",
|
||||
"transient", "try", "void", "volatile", "while"
|
||||
};
|
||||
|
||||
// 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
|
||||
private static final String KEYWORD_PATTERN = "\\b(" + String.join("|", KEYWORDS) + ")\\b";
|
||||
private static final String PAREN_PATTERN = "\\(|\\)";
|
||||
private static final String BRACE_PATTERN = "\\{|\\}";
|
||||
private static final String BRACKET_PATTERN = "\\[|\\]";
|
||||
private static final String SEMICOLON_PATTERN = "\\;";
|
||||
private static final String STRING_PATTERN = "\"([^\"\\\\]|\\\\.)*\"";
|
||||
private static final String COMMENT_PATTERN = "//[^\n]*" + "|" + "/\\*(.|\\R)*?\\*/" // 用于整体文本处理（文本块）
|
||||
+ "|" + "/\\*[^\\v]*" + "|" + "^\\h*\\*([^\\v]*|/)"; // 用于可见段落处理（逐行）
|
||||
|
||||
// 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
|
||||
private static final Pattern PATTERN = Pattern.compile(
|
||||
"(?<KEYWORD>" + KEYWORD_PATTERN + ")"
|
||||
+ "|(?<PAREN>" + PAREN_PATTERN + ")"
|
||||
+ "|(?<BRACE>" + BRACE_PATTERN + ")"
|
||||
+ "|(?<BRACKET>" + BRACKET_PATTERN + ")"
|
||||
+ "|(?<SEMICOLON>" + SEMICOLON_PATTERN + ")"
|
||||
+ "|(?<STRING>" + STRING_PATTERN + ")"
|
||||
+ "|(?<COMMENT>" + COMMENT_PATTERN + ")"
|
||||
);
|
||||
|
||||
/**
|
||||
* 用于记录日志的静态Logger对象
|
||||
@ -35,14 +88,142 @@ public class LineNumberTextArea extends StyleClassedTextArea {
|
||||
* 用于创建 LineNumberTextArea 对象
|
||||
*/
|
||||
public LineNumberTextArea() {
|
||||
//上、右、下、左
|
||||
setPadding(new Insets(8, 0, 0, 0));
|
||||
setStyle("-fx-font-family: 'Courier New';");
|
||||
// 设置 LineNumberTextArea 的样式，包括边框和背景颜色
|
||||
getStyleClass().add("line-number-text-area");
|
||||
this.setParagraphGraphicFactory(LineNumberFactory.get(this));
|
||||
initListeners();
|
||||
// 上、右、下、左
|
||||
this.setPadding(new Insets(8, 0, 0, 0));
|
||||
|
||||
// 在区域左侧添加行号
|
||||
this.setParagraphGraphicFactory(LineNumberFactory.get(this));
|
||||
this.setContextMenu(new DefaultContextMenu());
|
||||
|
||||
// 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
|
||||
Subscription cleanupWhenNoLongerNeedIt = this
|
||||
.multiPlainChanges()
|
||||
.successionEnds(Duration.ofMillis(500))
|
||||
.subscribe(ignore -> this.setStyleSpans(0, computeHighlighting(this.getText())));
|
||||
|
||||
this.getVisibleParagraphs().addModificationObserver
|
||||
(
|
||||
new JavaKeywordsDemo.VisibleParagraphStyler<>(this, this::computeHighlighting)
|
||||
);
|
||||
|
||||
// 自动缩进：在按下回车键时插入上一行的缩进
|
||||
final Pattern whiteSpace = Pattern.compile("^\\s+");
|
||||
this.addEventHandler(KeyEvent.KEY_PRESSED, kE ->
|
||||
{
|
||||
if (kE.getCode() == KeyCode.ENTER) {
|
||||
int caretPosition = this.getCaretPosition();
|
||||
int currentParagraph = this.getCurrentParagraph();
|
||||
Matcher m0 = whiteSpace.matcher(this.getParagraph(currentParagraph - 1).getSegments().get(0));
|
||||
if (m0.find()) {
|
||||
Platform.runLater(() -> this.insertText(caretPosition, m0.group()));
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
initListeners();
|
||||
this.getStylesheets().add(Objects.requireNonNull(getClass().getResource("/css/java_code_styles.css")).toString());
|
||||
|
||||
}
|
||||
|
||||
|
||||
private StyleSpans<Collection<String>> computeHighlighting(String text) {
|
||||
Matcher matcher = PATTERN.matcher(text);
|
||||
int lastKwEnd = 0;
|
||||
StyleSpansBuilder<Collection<String>> spansBuilder
|
||||
= new StyleSpansBuilder<>();
|
||||
while (matcher.find()) {
|
||||
String styleClass =
|
||||
matcher.group("KEYWORD") != null ? "keyword" :
|
||||
matcher.group("PAREN") != null ? "paren" :
|
||||
matcher.group("BRACE") != null ? "brace" :
|
||||
matcher.group("BRACKET") != null ? "bracket" :
|
||||
matcher.group("SEMICOLON") != null ? "semicolon" :
|
||||
matcher.group("STRING") != null ? "string" :
|
||||
matcher.group("COMMENT") != null ? "comment" :
|
||||
null; /* 永远不会发生 */
|
||||
assert styleClass != null;
|
||||
spansBuilder.add(Collections.emptyList(), matcher.start() - lastKwEnd);
|
||||
spansBuilder.add(Collections.singleton(styleClass), matcher.end() - matcher.start());
|
||||
lastKwEnd = matcher.end();
|
||||
}
|
||||
spansBuilder.add(Collections.emptyList(), text.length() - lastKwEnd);
|
||||
return spansBuilder.create();
|
||||
}
|
||||
|
||||
static class VisibleParagraphStyler<PS, SEG, S> implements Consumer<ListModification<? extends Paragraph<PS, SEG, S>>> {
|
||||
private final GenericStyledArea<PS, SEG, S> area;
|
||||
private final Function<String, StyleSpans<S>> computeStyles;
|
||||
private int prevParagraph, prevTextLength;
|
||||
|
||||
public VisibleParagraphStyler(GenericStyledArea<PS, SEG, S> area, Function<String, StyleSpans<S>> computeStyles) {
|
||||
this.computeStyles = computeStyles;
|
||||
this.area = area;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void accept(ListModification<? extends Paragraph<PS, SEG, S>> lm) {
|
||||
if (lm.getAddedSize() > 0) {
|
||||
Platform.runLater(() ->
|
||||
{
|
||||
int paragraph = Math.min(area.firstVisibleParToAllParIndex() + lm.getFrom(), area.getParagraphs().size() - 1);
|
||||
String text = area.getText(paragraph, 0, paragraph, area.getParagraphLength(paragraph));
|
||||
|
||||
if (paragraph != prevParagraph || text.length() != prevTextLength) {
|
||||
if (paragraph < area.getParagraphs().size() - 1) {
|
||||
int startPos = area.getAbsolutePosition(paragraph, 0);
|
||||
area.setStyleSpans(startPos, computeStyles.apply(text));
|
||||
}
|
||||
prevTextLength = text.length();
|
||||
prevParagraph = paragraph;
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private class DefaultContextMenu extends ContextMenu {
|
||||
private MenuItem fold, unfold, print;
|
||||
|
||||
public DefaultContextMenu() {
|
||||
fold = new MenuItem("折叠所选文本");
|
||||
fold.setOnAction(AE -> {
|
||||
hide();
|
||||
fold();
|
||||
});
|
||||
|
||||
unfold = new MenuItem("从光标处展开");
|
||||
unfold.setOnAction(AE -> {
|
||||
hide();
|
||||
unfold();
|
||||
});
|
||||
|
||||
print = new MenuItem("打印");
|
||||
print.setOnAction(AE -> {
|
||||
hide();
|
||||
print();
|
||||
});
|
||||
|
||||
getItems().addAll(fold, unfold, print);
|
||||
}
|
||||
|
||||
/**
|
||||
* 折叠多行所选文本，仅显示第一行并隐藏其余部分。
|
||||
*/
|
||||
private void fold() {
|
||||
((CodeArea) getOwnerNode()).foldSelectedParagraphs();
|
||||
}
|
||||
|
||||
/**
|
||||
* 展开当前行/段落（如果有折叠）。
|
||||
*/
|
||||
private void unfold() {
|
||||
CodeArea area = (CodeArea) getOwnerNode();
|
||||
area.unfoldParagraphs(area.getCurrentParagraph());
|
||||
}
|
||||
|
||||
private void print() {
|
||||
System.out.println(((CodeArea) getOwnerNode()).getText());
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
@ -87,7 +268,7 @@ public class LineNumberTextArea extends StyleClassedTextArea {
|
||||
// 记录保存操作的日志信息
|
||||
LogUtil.getLogger(this.getClass()).info("正在自动保存---");
|
||||
} catch (IOException ignored) {
|
||||
// 如果发生IO异常，记录忽略的日志信息，但不中断程序执行
|
||||
// 如果发生IO异常，记录忽视的日志信息，但不中断程序执行
|
||||
LogUtil.getLogger(this.getClass()).info("已忽视IO异常!");
|
||||
}
|
||||
}
|
||||
|
||||
27
src/main/resources/css/java_code_styles.css
Normal file
27
src/main/resources/css/java_code_styles.css
Normal file
@ -0,0 +1,27 @@
|
||||
.keyword {
|
||||
-fx-fill: purple;
|
||||
-fx-font-weight: bold;
|
||||
}
|
||||
.semicolon {
|
||||
-fx-font-weight: bold;
|
||||
}
|
||||
.paren {
|
||||
-fx-fill: firebrick;
|
||||
-fx-font-weight: bold;
|
||||
}
|
||||
.bracket {
|
||||
-fx-fill: darkgreen;
|
||||
-fx-font-weight: bold;
|
||||
}
|
||||
.brace {
|
||||
-fx-fill: teal;
|
||||
-fx-font-weight: bold;
|
||||
}
|
||||
.string {
|
||||
-fx-fill: blue;
|
||||
}
|
||||
|
||||
.comment {
|
||||
-fx-fill: cadetblue;
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user