This page is part of multi-step Custom Language Support Tutorial. All previous steps must be executed in sequence for the code to work.
Code style settings enable defining formatting options. A code style settings provider creates an instance of the settings and also creates an options page in Settings. This example creates a Settings page that uses the default language code style settings, customized by a language code style settings provider.
Define Code Style SettingsDefine SimpleCodeStyleSettings for Simple Language by subclassing CustomCodeStyleSettings.
public class SimpleCodeStyleSettings extends CustomCodeStyleSettings { public SimpleCodeStyleSettings(CodeStyleSettings settings) { super("SimpleCodeStyleSettings", settings); } }
Define Code Style Settings ProviderThe code style settings provider gives the IntelliJ Platform a standard way to instantiate CustomCodeStyleSettings for the Simple Language.
Define SimpleCodeStyleSettingsProvider for Simple Language by subclassing CodeStyleSettingsProvider.
final class SimpleCodeStyleSettingsProvider extends CodeStyleSettingsProvider { @Override public CustomCodeStyleSettings createCustomSettings(@NotNull CodeStyleSettings settings) { return new SimpleCodeStyleSettings(settings); } @Override public String getConfigurableDisplayName() { return "Simple"; } @NotNull public CodeStyleConfigurable createConfigurable(@NotNull CodeStyleSettings settings, @NotNull CodeStyleSettings modelSettings) { return new CodeStyleAbstractConfigurable(settings, modelSettings, this.getConfigurableDisplayName()) { @Override protected @NotNull CodeStyleAbstractPanel createPanel(@NotNull CodeStyleSettings settings) { return new SimpleCodeStyleMainPanel(getCurrentSettings(), settings); } }; } private static class SimpleCodeStyleMainPanel extends TabbedLanguageCodeStylePanel { public SimpleCodeStyleMainPanel(CodeStyleSettings currentSettings, CodeStyleSettings settings) { super(SimpleLanguage.INSTANCE, currentSettings, settings); } } }
Register the Code Style Settings ProviderThe SimpleCodeStyleSettingsProvider implementation is registered with the IntelliJ Platform in the plugin configuration file using the com.intellij.codeStyleSettingsProvider extension point.
<extensions defaultExtensionNs="com.intellij"> <codeStyleSettingsProvider implementation="org.intellij.sdk.language.SimpleCodeStyleSettingsProvider"/> </extensions>
Define the Language Code Style Settings ProviderDefine SimpleLanguageCodeStyleSettingsProvider for Simple Language by subclassing LanguageCodeStyleSettingsProvider, which provides common code style settings for a specific language.
final class SimpleLanguageCodeStyleSettingsProvider extends LanguageCodeStyleSettingsProvider { @NotNull @Override public Language getLanguage() { return SimpleLanguage.INSTANCE; } @Override public void customizeSettings(@NotNull CodeStyleSettingsCustomizable consumer, @NotNull SettingsType settingsType) { if (settingsType == SettingsType.SPACING_SETTINGS) { consumer.showStandardOptions("SPACE_AROUND_ASSIGNMENT_OPERATORS"); consumer.renameStandardOption("SPACE_AROUND_ASSIGNMENT_OPERATORS", "Separator"); } else if (settingsType == SettingsType.BLANK_LINES_SETTINGS) { consumer.showStandardOptions("KEEP_BLANK_LINES_IN_CODE"); } } @Override public String getCodeSample(@NotNull SettingsType settingsType) { return """ # You are reading the ".properties" entry. ! The exclamation mark can also mark text as comments. website = https://en.wikipedia.org/ language = English # The backslash below tells the application to continue reading # the value onto the next line. message = Welcome to \\ Wikipedia! # Add spaces to the key key\\ with\\ spaces = This is the value that could be looked up with the key "key with spaces". # Unicode tab : \\u0009"""; } }
Register the Language Code Style Settings ProviderThe ``SimpleLanguageCodeStyleSettingsProvider` implementation is registered with the IntelliJ Platform in the plugin configuration file using the com.intellij.langCodeStyleSettingsProvider extension point.
<extensions defaultExtensionNs="com.intellij"> <langCodeStyleSettingsProvider implementation="org.intellij.sdk.language.SimpleLanguageCodeStyleSettingsProvider"/> </extensions>
Run the ProjectRun the plugin by using the Gradle runIde task.
In the IDE Development Instance, open the Simple Language code formatting page: .
19 March 2025
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