public class PropertiesAnnotator implements Annotator {private static final ExtensionPointName<DuplicatePropertyKeyAnnotationSuppressor>EP_NAME = ExtensionPointName.create("com.intellij.properties.duplicatePropertyKeyAnnotationSuppressor");@Overridepublic void annotate(@NotNull PsiElement element, @NotNull AnnotationHolder holder) {if (!(element instanceof Property property)) return;PropertiesFile propertiesFile = property.getPropertiesFile();final String key = property.getUnescapedKey();if (key == null) return;Collection<IProperty> others = propertiesFile.findPropertiesByKey(key);ASTNode keyNode = ((PropertyImpl)property).getKeyNode();if (keyNode == null) return;if (others.size() != 1 &&EP_NAME.findFirstSafe(suppressor -> suppressor.suppressAnnotationFor(property)) == null) {holder.newAnnotation(HighlightSeverity.ERROR,PropertiesBundle.message("duplicate.property.key.error.message")).range(keyNode).withFix(PropertiesQuickFixFactory.getInstance().createRemovePropertyFix(property)).create();}highlightTokens(property, keyNode, holder, new PropertiesHighlighter());ASTNode valueNode = ((PropertyImpl)property).getValueNode();if (valueNode != null) {highlightTokens(property, valueNode, holder, new PropertiesValueHighlighter());}}private static void highlightTokens(final Property property, final ASTNode node, final AnnotationHolder holder, PropertiesHighlighter highlighter) {Lexer lexer = highlighter.getHighlightingLexer();final String s = node.getText();lexer.start(s);while (lexer.getTokenType() != null) {IElementType elementType = lexer.getTokenType();TextAttributesKey[] keys = highlighter.getTokenHighlights(elementType);for (TextAttributesKey key : keys) {final String displayName = PropertiesComponent.getDisplayName(key);final HighlightSeverity severity = PropertiesComponent.getSeverity(key);if (severity != null && displayName != null) {int start = lexer.getTokenStart() + node.getTextRange().getStartOffset();int end = lexer.getTokenEnd() + node.getTextRange().getStartOffset();TextRange textRange = new TextRange(start, end);TextAttributes attributes = EditorColorsManager.getInstance().getGlobalScheme().getAttributes(key);AnnotationBuilder builder = holder.newAnnotation(severity, displayName).range(textRange).enforcedTextAttributes(attributes);int startOffset = textRange.getStartOffset();if (key == PropertiesComponent.PROPERTIES_INVALID_STRING_ESCAPE.getTextAttributesKey()) {builder = builder.withFix(new IntentionAction() {@Override@NotNullpublic String getText() {return PropertiesBundle.message("unescape");}@Override@NotNullpublic String getFamilyName() {return getText();}@Overridepublic boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) {if (!BaseIntentionAction.canModify(file)) return false;String text = file.getText();return text.length() > startOffset && text.charAt(startOffset) == '\\';}@Overridepublic void invoke(@NotNull Project project, Editor editor, PsiFile file) {if (file.getText().charAt(startOffset) == '\\') {editor.getDocument().deleteString(startOffset, startOffset + 1);}}@Overridepublic boolean startInWriteAction() {return true;}});}builder.create();}}lexer.advance();}}
}

二、示例

1、定义SyntaxHighlighterFactory

public class SimpleSyntaxHighlighter extends SyntaxHighlighterBase {public static final TextAttributesKey SEPARATOR =createTextAttributesKey("SIMPLE_SEPARATOR", DefaultLanguageHighlighterColors.OPERATION_SIGN);public static final TextAttributesKey KEY =createTextAttributesKey("SIMPLE_KEY", DefaultLanguageHighlighterColors.KEYWORD);public static final TextAttributesKey VALUE =createTextAttributesKey("SIMPLE_VALUE", DefaultLanguageHighlighterColors.STRING);public static final TextAttributesKey COMMENT =createTextAttributesKey("SIMPLE_COMMENT", DefaultLanguageHighlighterColors.LINE_COMMENT);public static final TextAttributesKey BAD_CHARACTER =createTextAttributesKey("SIMPLE_BAD_CHARACTER", HighlighterColors.BAD_CHARACTER);private static final TextAttributesKey[] BAD_CHAR_KEYS = new TextAttributesKey[]{BAD_CHARACTER};private static final TextAttributesKey[] SEPARATOR_KEYS = new TextAttributesKey[]{SEPARATOR};private static final TextAttributesKey[] KEY_KEYS = new TextAttributesKey[]{KEY};private static final TextAttributesKey[] VALUE_KEYS = new TextAttributesKey[]{VALUE};private static final TextAttributesKey[] COMMENT_KEYS = new TextAttributesKey[]{COMMENT};private static final TextAttributesKey[] EMPTY_KEYS = new TextAttributesKey[0];@NotNull@Overridepublic Lexer getHighlightingLexer() {return new SimpleLexerAdapter();}@Overridepublic TextAttributesKey @NotNull [] getTokenHighlights(IElementType tokenType) {if (tokenType.equals(SimpleTypes.SEPARATOR)) {return SEPARATOR_KEYS;}if (tokenType.equals(SimpleTypes.KEY)) {return KEY_KEYS;}if (tokenType.equals(SimpleTypes.VALUE)) {return VALUE_KEYS;}if (tokenType.equals(SimpleTypes.COMMENT)) {return COMMENT_KEYS;}if (tokenType.equals(TokenType.BAD_CHARACTER)) {return BAD_CHAR_KEYS;}return EMPTY_KEYS;}}

<extensions defaultExtensionNs="com.intellij"><lang.syntaxHighlighterFactorylanguage="Simple"implementationClass="org.intellij.sdk.language.SimpleSyntaxHighlighterFactory"/>
</extensions>

2、定义颜色设置界面

public class SimpleColorSettingsPage implements ColorSettingsPage {private static final AttributesDescriptor[] DESCRIPTORS = new AttributesDescriptor[]{new AttributesDescriptor("Key", SimpleSyntaxHighlighter.KEY),new AttributesDescriptor("Separator", SimpleSyntaxHighlighter.SEPARATOR),new AttributesDescriptor("Value", SimpleSyntaxHighlighter.VALUE),new AttributesDescriptor("Bad value", SimpleSyntaxHighlighter.BAD_CHARACTER)};@Nullable@Overridepublic Icon getIcon() {return SimpleIcons.FILE;}@NotNull@Overridepublic SyntaxHighlighter getHighlighter() {return new SimpleSyntaxHighlighter();}@NotNull@Overridepublic String getDemoText() {return "# You are reading the \".properties\" entry.\n" +"! The exclamation mark can also mark text as comments.\n" +"website = https://en.wikipedia.org/\n" +"language = English\n" +"# The backslash below tells the application to continue reading\n" +"# the value onto the next line.\n" +"message = Welcome to \\\n" +"          Wikipedia!\n" +"# Add spaces to the key\n" +"key\\ with\\ spaces = This is the value that could be looked up with the key \"key with spaces\".\n" +"# Unicode\n" +"tab : \\u0009";}@Nullable@Overridepublic Map<String, TextAttributesKey> getAdditionalHighlightingTagToDescriptorMap() {return null;}@Overridepublic AttributesDescriptor @NotNull [] getAttributeDescriptors() {return DESCRIPTORS;}@Overridepublic ColorDescriptor @NotNull [] getColorDescriptors() {return ColorDescriptor.EMPTY_ARRAY;}@NotNull@Overridepublic String getDisplayName() {return "Simple";}}

支持通过用 分隔节点来对运算符或大括号等相关属性进行分组//，例如：

AttributesDescriptor[] DESCRIPTORS = new AttributesDescriptor[] {new AttributesDescriptor("Operators//Plus", MySyntaxHighlighter.PLUS),new AttributesDescriptor("Operators//Minus", MySyntaxHighlighter.MINUS),new AttributesDescriptor("Operators//Advanced//Sigma", MySyntaxHighlighter.SIGMA),new AttributesDescriptor("Operators//Advanced//Pi", MySyntaxHighlighter.PI),//...
};

<extensions defaultExtensionNs="com.intellij"><colorSettingsPageimplementation="org.intellij.sdk.language.SimpleColorSettingsPage"/>
</extensions>

3、测试运行

        颜色配置页面可从Settings | Editor | Color Scheme | Simple查看。如下图：