From e7ec0c6c4866de68ea1d02061992cd5ea5381853 Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Wed, 2 May 2018 14:46:55 +0200
Subject: [PATCH] IDEA-187518 Support italic in completion lookup element item
 text

---
 .../codeInsight/lookup/LookupElementBuilder.java       | 10 ++++++++++
 .../codeInsight/lookup/LookupElementPresentation.java  | 10 ++++++++++
 .../codeInsight/lookup/impl/LookupCellRenderer.java    |  9 ++++++---
 3 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/platform/lang-api/src/com/intellij/codeInsight/lookup/LookupElementBuilder.java b/platform/lang-api/src/com/intellij/codeInsight/lookup/LookupElementBuilder.java
index ba39aa60b1e3..e971874cd397 100644
--- a/platform/lang-api/src/com/intellij/codeInsight/lookup/LookupElementBuilder.java
+++ b/platform/lang-api/src/com/intellij/codeInsight/lookup/LookupElementBuilder.java
@@ -238,6 +238,16 @@ public final class LookupElementBuilder extends LookupElement {
     return new LookupElementBuilder(myLookupString, myObject, myInsertHandler, null, presentation, myPsiElement, myAllLookupStrings, myCaseSensitive);
   }
 
+  /**
+   * @since 2018.2
+   */
+  @Contract(pure=true)
+  public LookupElementBuilder withItemTextItalic(boolean italic) {
+    final LookupElementPresentation presentation = copyPresentation();
+    presentation.setItemTextItalic(italic);
+    return new LookupElementBuilder(myLookupString, myObject, myInsertHandler, null, presentation, myPsiElement, myAllLookupStrings, myCaseSensitive);
+  }
+
   /**
    * @deprecated use {@link #withTypeText(String)}
    */
diff --git a/platform/lang-api/src/com/intellij/codeInsight/lookup/LookupElementPresentation.java b/platform/lang-api/src/com/intellij/codeInsight/lookup/LookupElementPresentation.java
index 515273778b8e..8d3f3d106d35 100644
--- a/platform/lang-api/src/com/intellij/codeInsight/lookup/LookupElementPresentation.java
+++ b/platform/lang-api/src/com/intellij/codeInsight/lookup/LookupElementPresentation.java
@@ -40,6 +40,7 @@ public class LookupElementPresentation {
   private Color myItemTextForeground = JBColor.foreground();
   private boolean myItemTextBold;
   private boolean myItemTextUnderlined;
+  private boolean myItemTextItalic;
   private boolean myTypeGrayed;
   @Nullable private List<TextFragment> myTail;
 
@@ -59,6 +60,10 @@ public class LookupElementPresentation {
     myItemTextBold = bold;
   }
 
+  public void setItemTextItalic(boolean itemTextItalic) {
+    myItemTextItalic = itemTextItalic;
+  }
+
   public void setTailText(@Nullable String text) {
     setTailText(text, false);
   }
@@ -165,6 +170,10 @@ public class LookupElementPresentation {
     return myItemTextBold;
   }
 
+  public boolean isItemTextItalic() {
+    return myItemTextItalic;
+  }
+
   public boolean isItemTextUnderlined() {
     return myItemTextUnderlined;
   }
@@ -192,6 +201,7 @@ public class LookupElementPresentation {
     myTypeText = presentation.myTypeText;
     myStrikeout = presentation.myStrikeout;
     myItemTextBold = presentation.myItemTextBold;
+    myItemTextItalic = presentation.myItemTextItalic;
     myTypeGrayed = presentation.myTypeGrayed;
     myTypeIconRightAligned = presentation.myTypeIconRightAligned;
     myItemTextUnderlined = presentation.myItemTextUnderlined;
diff --git a/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupCellRenderer.java b/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupCellRenderer.java
index e83b13ab8a2e..ffea30063054 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupCellRenderer.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupCellRenderer.java
@@ -261,7 +261,7 @@ public class LookupCellRenderer implements ListCellRenderer {
                                 Color foreground,
                                 int allowedWidth,
                                 boolean nonFocusedSelection, FontMetrics fontMetrics) {
-    int style = getStyle(false, presentation.isStrikeout(), false);
+    int style = getStyle(false, presentation.isStrikeout(), false, false);
 
     for (LookupElementPresentation.TextFragment fragment : presentation.getTailFragments()) {
       if (allowedWidth < 0) {
@@ -341,7 +341,7 @@ public class LookupCellRenderer implements ListCellRenderer {
 
     Font customItemFont = myLookup.getCustomFont(item, bold);
     myNameComponent.setFont(customItemFont != null ? customItemFont : bold ? myBoldFont : myNormalFont);
-    int style = getStyle(bold, presentation.isStrikeout(), presentation.isItemTextUnderlined());
+    int style = getStyle(bold, presentation.isStrikeout(), presentation.isItemTextUnderlined(), presentation.isItemTextItalic());
 
     final FontMetrics metrics = getRealFontMetrics(item, bold);
     final String name = trimLabelText(presentation.getItemText(), allowedWidth, metrics);
@@ -361,7 +361,7 @@ public class LookupCellRenderer implements ListCellRenderer {
   }
 
   @SimpleTextAttributes.StyleAttributeConstant
-  private static int getStyle(boolean bold, boolean strikeout, boolean underlined) {
+  private static int getStyle(boolean bold, boolean strikeout, boolean underlined, boolean italic) {
     int style = bold ? SimpleTextAttributes.STYLE_BOLD : SimpleTextAttributes.STYLE_PLAIN;
     if (strikeout) {
       style |= SimpleTextAttributes.STYLE_STRIKEOUT;
@@ -369,6 +369,9 @@ public class LookupCellRenderer implements ListCellRenderer {
     if (underlined) {
       style |= SimpleTextAttributes.STYLE_UNDERLINE;
     }
+    if (italic) {
+      style |= SimpleTextAttributes.STYLE_ITALIC;
+    }
     return style;
   }