Add "Restore defaults" to editor font options

platform/editor-ui-ex/src/com/intellij/openapi/editor/colors/impl/AppEditorFontOptions.java

@@ -22,6 +22,7 @@ import com.intellij.openapi.components.State;
 import com.intellij.openapi.components.Storage;
 import com.intellij.openapi.editor.colors.EditorFontCache;
 import com.intellij.openapi.editor.colors.FontPreferences;
+import com.intellij.openapi.editor.colors.ModifiableFontPreferences;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -64,6 +65,10 @@ public class AppEditorFontOptions implements PersistentStateComponent<AppEditorF
         SECONDARY_FONT_FAMILY = fontFamilies.get(1);
       }
     }
+
+    private static PersistentFontPreferences getDefaultState() {
+      return new PersistentFontPreferences();
+    }
   }
 
 
@@ -79,17 +84,25 @@ public class AppEditorFontOptions implements PersistentStateComponent<AppEditorF
 
   @Override
   public void loadState(PersistentFontPreferences state) {
-    myFontPreferences.clear();
-    int fontSize = UISettings.restoreFontSize(state.FONT_SIZE, state.FONT_SCALE);
-    myFontPreferences.register(state.FONT_FAMILY, fontSize);
-    myFontPreferences.setLineSpacing(state.LINE_SPACING);
-    myFontPreferences.setUseLigatures(state.USE_LIGATURES);
-    if (state.SECONDARY_FONT_FAMILY != null) {
-      myFontPreferences.register(state.SECONDARY_FONT_FAMILY, fontSize);
-    }
+    copyState(state, myFontPreferences);
     myFontPreferences.setChangeListener(() -> EditorFontCache.getInstance().reset());
   }
 
+  private static void copyState(PersistentFontPreferences state, @NotNull ModifiableFontPreferences fontPreferences) {
+    fontPreferences.clear();
+    int fontSize = UISettings.restoreFontSize(state.FONT_SIZE, state.FONT_SCALE);
+    fontPreferences.register(state.FONT_FAMILY, fontSize);
+    fontPreferences.setLineSpacing(state.LINE_SPACING);
+    fontPreferences.setUseLigatures(state.USE_LIGATURES);
+    if (state.SECONDARY_FONT_FAMILY != null) {
+      fontPreferences.register(state.SECONDARY_FONT_FAMILY, fontSize);
+    }
+  }
+
+  public static void initDefaults(@NotNull ModifiableFontPreferences fontPreferences) {
+    copyState(PersistentFontPreferences.getDefaultState(), fontPreferences);
+  }
+
   @NotNull
   public FontPreferences getFontPreferences() {
     return myFontPreferences;

platform/lang-impl/src/com/intellij/application/options/editor/fonts/AppEditorFontConfigurable.java

@@ -77,10 +77,7 @@ public class AppEditorFontConfigurable implements SearchableConfigurable, NoScro
   @Override
   public void reset() {
     getStoredPreferences().copyTo(getUIFontPreferences());
-    AppEditorFontOptionsPanel optionsPanel = getFontPanel().getOptionsPanel();
-    optionsPanel.updateWarning();
-    optionsPanel.updateOptionsList();
-    getFontPanel().updatePreview();
+    getFontPanel().getOptionsPanel().updateOnChangedFont();
   }
 
   @NotNull

platform/lang-impl/src/com/intellij/application/options/editor/fonts/AppEditorFontOptionsPanel.java

@@ -17,12 +17,16 @@ package com.intellij.application.options.editor.fonts;
 
 import com.intellij.application.options.colors.AbstractFontOptionsPanel;
 import com.intellij.application.options.colors.ColorAndFontOptions;
+import com.intellij.application.options.colors.ColorAndFontSettingsListener;
 import com.intellij.icons.AllIcons;
 import com.intellij.ide.DataManager;
 import com.intellij.openapi.application.ApplicationBundle;
 import com.intellij.openapi.editor.colors.EditorColorsManager;
 import com.intellij.openapi.editor.colors.EditorColorsScheme;
 import com.intellij.openapi.editor.colors.FontPreferences;
+import com.intellij.openapi.editor.colors.ModifiableFontPreferences;
+import com.intellij.openapi.editor.colors.impl.AppEditorFontOptions;
+import com.intellij.openapi.editor.colors.impl.FontPreferencesImpl;
 import com.intellij.openapi.options.Configurable;
 import com.intellij.openapi.options.ex.Settings;
 import com.intellij.ui.HoverHyperlinkLabel;
@@ -34,14 +38,20 @@ import javax.swing.*;
 import javax.swing.event.HyperlinkEvent;
 import javax.swing.event.HyperlinkListener;
 import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
 
 public class AppEditorFontOptionsPanel extends AbstractFontOptionsPanel {
   private final EditorColorsScheme myScheme;
   private JPanel myWarningPanel;
   private JLabel myEditorFontLabel;
+  private JButton myRestoreButton;
+  private FontPreferences myDefaultPreferences;
 
   protected AppEditorFontOptionsPanel(EditorColorsScheme scheme) {
     myScheme = scheme;
+    myDefaultPreferences = new FontPreferencesImpl();
+    AppEditorFontOptions.initDefaults((ModifiableFontPreferences)myDefaultPreferences);
     updateOptionsList();
   }
 
@@ -57,9 +67,44 @@ public class AppEditorFontOptionsPanel extends AbstractFontOptionsPanel {
     topPanel.add(myWarningPanel, c);
     c.gridy = 1;
     topPanel.add(createFontSettingsPanel(), c);
+    c.insets = JBUI.insets(5, 0, 0, 0);
+    c.fill = GridBagConstraints.HORIZONTAL;
+    c.gridy = 2;
+    topPanel.add(new JSeparator(), c);
+    c.gridy = 3;
+    c.fill = GridBagConstraints.NONE;
+    myRestoreButton = new JButton(ApplicationBundle.message("settings.editor.font.restored.defaults"));
+    myRestoreButton.addActionListener(new ActionListener() {
+      @Override
+      public void actionPerformed(ActionEvent e) {
+        restoreDefaults();
+      }
+    });
+    addListener(new ColorAndFontSettingsListener.Abstract() {
+      @Override
+      public void fontChanged() {
+        updateWarning();
+        updateRestoreButtonState();
+      }
+    });
+    topPanel.add(myRestoreButton, c);
     return topPanel;
   }
 
+  private void restoreDefaults() {
+    AppEditorFontOptions.initDefaults((ModifiableFontPreferences)getFontPreferences());
+    updateOnChangedFont();
+  }
+
+  public void updateOnChangedFont() {
+    updateOptionsList();
+    fireFontChanged();
+  }
+
+  private void updateRestoreButtonState() {
+    myRestoreButton.setEnabled(!myDefaultPreferences.equals(getFontPreferences()));
+  }
+
   private JPanel createMessagePanel() {
     JPanel messagePanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
     messagePanel.add(new JLabel(AllIcons.General.BalloonWarning));

platform/platform-resources-en/src/messages/ApplicationBundle.properties

@@ -540,6 +540,7 @@ error.scheme.must.have.a.name=Scheme must have a name
 error.illegal.scheme.name=Illegal scheme name
 error.a.scheme.with.this.name.already.exists.or.was.deleted.without.applying.the.changes=A scheme with this name already exists or was deleted without applying the changes
 title.select.font=Select Font
+settings.editor.font.restored.defaults=Restore Defaults
 settings.editor.font.overwrite=Use color scheme font instead of the
 settings.editor.console.font.overwrite=Use console font instead of the
 action.apply.editor.font.settings=Apply editor font settings