show warning in settings UI when user enables ligatures, and IDE is not launched using bundled JRE

add clickable link to Confluence page about JetBrains Runtime Environment

platform/lang-impl/src/com/intellij/application/options/colors/FontOptions.java

@@ -18,6 +18,7 @@ package com.intellij.application.options.colors;
 
 import com.intellij.application.options.EditorFontsConstants;
 import com.intellij.icons.AllIcons;
+import com.intellij.ide.IdeTooltipManager;
 import com.intellij.ide.ui.AntialiasingType;
 import com.intellij.ide.ui.UISettings;
 import com.intellij.openapi.application.ApplicationBundle;
@@ -27,10 +28,7 @@ import com.intellij.openapi.editor.colors.EditorColorsScheme;
 import com.intellij.openapi.editor.colors.FontPreferences;
 import com.intellij.openapi.ui.MessageType;
 import com.intellij.openapi.util.SystemInfo;
-import com.intellij.ui.DocumentAdapter;
-import com.intellij.ui.FontComboBox;
-import com.intellij.ui.FontInfoRenderer;
-import com.intellij.ui.IdeBorderFactory;
+import com.intellij.ui.*;
 import com.intellij.ui.components.JBCheckBox;
 import com.intellij.util.EventDispatcher;
 import com.intellij.util.ui.JBUI;
@@ -105,7 +103,11 @@ public class FontOptions extends JPanel implements OptionsPanel{
     myEnableLigaturesCheckbox.setBorder(null);
     panel.add(myEnableLigaturesCheckbox);
     JLabel warningIcon = new JLabel(AllIcons.General.BalloonWarning);
-    warningIcon.setToolTipText(ApplicationBundle.message("ligatures.jre.warning", ApplicationNamesInfo.getInstance().getFullProductName()));
+    IdeTooltipManager.getInstance().setCustomTooltip(
+      warningIcon,
+      new TooltipWithClickableLinks.ForBrowser(warningIcon,
+                                               ApplicationBundle.message("ligatures.jre.warning",
+                                                                         ApplicationNamesInfo.getInstance().getFullProductName())));
     warningIcon.setBorder(JBUI.Borders.emptyLeft(5));
     updateWarningIconVisibility(warningIcon);
     panel.add(warningIcon);

platform/platform-impl/src/com/intellij/ide/IdeTooltipManager.java

@@ -38,6 +38,7 @@ import com.intellij.ui.*;
 import com.intellij.ui.awt.RelativePoint;
 import com.intellij.ui.components.panels.Wrapper;
 import com.intellij.util.Alarm;
+import com.intellij.util.ObjectUtils;
 import com.intellij.util.ui.Html;
 import com.intellij.util.ui.JBInsets;
 import com.intellij.util.ui.JBUI;
@@ -57,6 +58,7 @@ import java.awt.event.AWTEventListener;
 import java.awt.event.MouseEvent;
 
 public class IdeTooltipManager implements ApplicationComponent, AWTEventListener {
+  private static final String CUSTOM_TOOLTIP = "custom.tooltip";
   public static final String IDE_TOOLTIP_PLACE = "IdeTooltip";
 
   public static final Color GRAPHITE_COLOR = new Color(100, 100, 100, 230);
@@ -177,7 +179,7 @@ public class IdeTooltipManager implements ApplicationComponent, AWTEventListener
     }
 
     String tooltipText = comp.getToolTipText(me);
-    if (tooltipText == null || tooltipText.trim().isEmpty()) return;
+    if ((tooltipText == null || tooltipText.trim().isEmpty()) && getCustomTooltip(comp) == null) return;
 
 
     boolean centerDefault = Boolean.TRUE.equals(comp.getClientProperty(UIUtil.CENTER_TOOLTIP_DEFAULT));
@@ -199,29 +201,40 @@ public class IdeTooltipManager implements ApplicationComponent, AWTEventListener
   }
 
   private void queueShow(final JComponent c, final MouseEvent me, final boolean toCenter, int shift, int posChangeX, int posChangeY) {
-    String aText = String.valueOf(c.getToolTipText(me));
-    final IdeTooltip tooltip = new IdeTooltip(c, me.getPoint(), null, /*new Object()*/c, aText) {
-      @Override
-      protected boolean beforeShow() {
-        myCurrentEvent = me;
+    IdeTooltip tooltip = getCustomTooltip(c);
+    if (tooltip == null) {
+      String aText = String.valueOf(c.getToolTipText(me));
+      tooltip = new IdeTooltip(c, me.getPoint(), null, /*new Object()*/c, aText) {
+        @Override
+        protected boolean beforeShow() {
+          myCurrentEvent = me;
 
-        if (!c.isShowing()) return false;
+          if (!c.isShowing()) return false;
 
-        String text = c.getToolTipText(myCurrentEvent);
-        if (text == null || text.trim().isEmpty()) return false;
+          String text = c.getToolTipText(myCurrentEvent);
+          if (text == null || text.trim().isEmpty()) return false;
 
-        JLayeredPane layeredPane = UIUtil.getParentOfType(JLayeredPane.class, c);
+          JLayeredPane layeredPane = UIUtil.getParentOfType(JLayeredPane.class, c);
 
-        final JEditorPane pane = initPane(text, new HintHint(me).setAwtTooltip(true), layeredPane);
-        final Wrapper wrapper = new Wrapper(pane);
-        setTipComponent(wrapper);
-        return true;
-      }
-    }.setToCenter(toCenter).setCalloutShift(shift).setPositionChangeShift(posChangeX, posChangeY).setLayer(Balloon.Layer.top);
+          final JEditorPane pane = initPane(text, new HintHint(me).setAwtTooltip(true), layeredPane);
+          final Wrapper wrapper = new Wrapper(pane);
+          setTipComponent(wrapper);
+          return true;
+        }
+      }.setToCenter(toCenter).setCalloutShift(shift).setPositionChangeShift(posChangeX, posChangeY).setLayer(Balloon.Layer.top);
+    }
 
     show(tooltip, false);
   }
 
+  public void setCustomTooltip(JComponent component, IdeTooltip tooltip) {
+    component.putClientProperty(CUSTOM_TOOLTIP, tooltip);
+  }
+
+  public IdeTooltip getCustomTooltip(JComponent component) {
+    return ObjectUtils.tryCast(component.getClientProperty(CUSTOM_TOOLTIP), IdeTooltip.class);
+  }
+
   public IdeTooltip show(final IdeTooltip tooltip, boolean now) {
     return show(tooltip, now, true);
   }

platform/platform-impl/src/com/intellij/ui/TooltipWithClickableLinks.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2000-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.ui;
+
+import com.intellij.ide.BrowserUtil;
+import com.intellij.ide.IdeTooltip;
+import com.intellij.ide.IdeTooltipManager;
+import com.intellij.ide.TooltipEvent;
+
+import javax.swing.*;
+import javax.swing.event.HyperlinkEvent;
+import javax.swing.event.HyperlinkListener;
+import java.awt.*;
+
+/**
+ * Custom tooltip implementation which supports clickable links in HTML text
+ *
+ * @see IdeTooltipManager#setCustomTooltip(JComponent, IdeTooltip)
+ */
+public class TooltipWithClickableLinks extends IdeTooltip {
+  public TooltipWithClickableLinks(JComponent component, String htmlText, HyperlinkListener hyperlinkListener) {
+    super(component, new Point(), createTipComponent(htmlText, hyperlinkListener), component, htmlText);
+  }
+
+  private static JComponent createTipComponent(String text, HyperlinkListener hyperlinkListener) {
+    JEditorPane pane = IdeTooltipManager.initPane(text, new HintHint().setAwtTooltip(true), null);
+    pane.addHyperlinkListener(hyperlinkListener);
+    return pane;
+  }
+
+  @Override
+  protected boolean canAutohideOn(TooltipEvent event) {
+    return !event.isIsEventInsideBalloon();
+  }
+
+  public static class ForBrowser extends TooltipWithClickableLinks {
+    public ForBrowser(JComponent component, String htmlText) {
+      super(component, htmlText, new HyperlinkAdapter() {
+        @Override
+        protected void hyperlinkActivated(HyperlinkEvent e) {
+          BrowserUtil.browse(e.getURL());
+        }
+      });
+    }
+  }
+}

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

@@ -533,7 +533,7 @@ checkbox.show.only.monospaced.fonts=Show only monospaced fonts
 primary.font=Primary font:
 secondary.font=Secondary font:
 use.ligatures=Enable font ligatures
-ligatures.jre.warning=The JRE you are running {0} with might have\nfunctional and performance issues related to ligatures support.\nTo avoid such issues, run IntelliJ IDEA with the bundled JRE.
+ligatures.jre.warning=<html>The JRE you are running {0} with might have<br>functional and performance issues related to ligatures support.<br>To avoid such issues, run {0} with <a href="https://confluence.jetbrains.com/display/IDEADEV/JetBrains+Runtime+Environment">JetBrains Runtime</a>.
 editbox.enter.tag.name=Enter tag name:
 title.tag.name=Tag Name
 title.xml=XML