5. Syntax Highlighter and Color Settings Page
5.1. Define a syntax highlighter
package com.simpleplugin;
import com.intellij.lexer.Lexer;
import com.intellij.openapi.editor.DefaultLanguageHighlighterColors;
import com.intellij.openapi.editor.HighlighterColors;
import com.intellij.openapi.editor.colors.TextAttributesKey;
import com.intellij.openapi.fileTypes.SyntaxHighlighterBase;
import com.intellij.psi.TokenType;
import com.intellij.psi.tree.IElementType;
import com.simpleplugin.psi.SimpleTypes;
import org.jetbrains.annotations.NotNull;
import static com.intellij.openapi.editor.colors.TextAttributesKey.createTextAttributesKey;
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
@Override
public Lexer getHighlightingLexer() {
return new SimpleLexerAdapter();
}
@NotNull
@Override
public TextAttributesKey[] getTokenHighlights(IElementType tokenType) {
if (tokenType.equals(SimpleTypes.SEPARATOR)) {
return SEPARATOR_KEYS;
} else if (tokenType.equals(SimpleTypes.KEY)) {
return KEY_KEYS;
} else if (tokenType.equals(SimpleTypes.VALUE)) {
return VALUE_KEYS;
} else if (tokenType.equals(SimpleTypes.COMMENT)) {
return COMMENT_KEYS;
} else if (tokenType.equals(TokenType.BAD_CHARACTER)) {
return BAD_CHAR_KEYS;
} else {
return EMPTY_KEYS;
}
}
}
5.2. Define a syntax highlighter factory
package com.simpleplugin;
import com.intellij.openapi.fileTypes.SyntaxHighlighter;
import com.intellij.openapi.fileTypes.SyntaxHighlighterFactory;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import org.jetbrains.annotations.NotNull;
public class SimpleSyntaxHighlighterFactory extends SyntaxHighlighterFactory {
@NotNull
@Override
public SyntaxHighlighter getSyntaxHighlighter(Project project, VirtualFile virtualFile) {
return new SimpleSyntaxHighlighter();
}
}
5.3. Register the syntax highlighter factory
<lang.syntaxHighlighterFactory key="Simple" implementationClass="com.simpleplugin.SimpleSyntaxHighlighterFactory"/>
5.4. Run the project
5.5. Define a color settings page
package com.simpleplugin;
import com.intellij.openapi.editor.colors.TextAttributesKey;
import com.intellij.openapi.fileTypes.SyntaxHighlighter;
import com.intellij.openapi.options.colors.AttributesDescriptor;
import com.intellij.openapi.options.colors.ColorDescriptor;
import com.intellij.openapi.options.colors.ColorSettingsPage;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import javax.swing.*;
import java.util.Map;
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),
};
@Nullable
@Override
public Icon getIcon() {
return SimpleIcons.FILE;
}
@NotNull
@Override
public SyntaxHighlighter getHighlighter() {
return new SimpleSyntaxHighlighter();
}
@NotNull
@Override
public String getDemoText() {
return "# You are reading the \".properties\" entry.\n" +
"! The exclamation mark can also mark text as comments.\n" +
"website = http://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
@Override
public Map<String, TextAttributesKey> getAdditionalHighlightingTagToDescriptorMap() {
return null;
}
@NotNull
@Override
public AttributesDescriptor[] getAttributeDescriptors() {
return DESCRIPTORS;
}
@NotNull
@Override
public ColorDescriptor[] getColorDescriptors() {
return ColorDescriptor.EMPTY_ARRAY;
}
@NotNull
@Override
public String getDisplayName() {
return "Simple";
}
}
5.6. Register the color settings page
<colorSettingsPage implementation="com.simpleplugin.SimpleColorSettingsPage"/>
5.7. Run the project
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