expose EditorImpl's getAscent() method in Editor interface

GitOrigin-RevId: a75822a2367a2d82623df60f9375804875e08efa

platform/editor-ui-api/src/com/intellij/openapi/editor/Editor.java

@@ -4,6 +4,7 @@ package com.intellij.openapi.editor;
 import com.intellij.openapi.Disposable;
 import com.intellij.openapi.actionSystem.DataProvider;
 import com.intellij.openapi.editor.colors.EditorColorsScheme;
+import com.intellij.openapi.editor.colors.EditorFontType;
 import com.intellij.openapi.editor.event.EditorMouseEventArea;
 import com.intellij.openapi.editor.event.EditorMouseListener;
 import com.intellij.openapi.editor.event.EditorMouseMotionListener;
@@ -444,4 +445,14 @@ public interface Editor extends UserDataHolder {
 
   @NotNull
   EditorKind getEditorKind();
+
+  /**
+   * Vertical distance, in pixels, between the top of visual line (corresponding coordinate is returned by {@link #visualLineToY(int)},
+   * {@link #visualPositionToXY(VisualPosition)}, etc) and baseline of text in that visual line.
+   */
+  default int getAscent() {
+    // actual implementation in EditorImpl is a bit more complex, but this gives an idea how it's constructed
+    return (int)(getContentComponent().getFontMetrics(getColorsScheme().getFont(EditorFontType.PLAIN)).getAscent() *
+                 getColorsScheme().getLineSpacing());
+  }
 }

platform/lang-impl/src/com/intellij/codeInsight/intention/impl/config/LazyEditor.java

@@ -304,4 +304,9 @@ class LazyEditor extends UserDataHolderBase implements Editor {
   public IndentsModel getIndentsModel() {
     return getEditor().getIndentsModel();
   }
+
+  @Override
+  public int getAscent() {
+    return getEditor().getAscent();
+  }
 }

platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupPreview.java

@@ -98,7 +98,7 @@ class LookupPreview {
         Editor editor = inlay.getEditor();
         g.setColor(JBColor.GRAY);
         g.setFont(getFont(editor));
-        g.drawString(suffix, r.x, r.y + ((EditorImpl)editor).getAscent());
+        g.drawString(suffix, r.x, r.y + editor.getAscent());
       }
 
       private Font getFont(@NotNull Editor editor) {

platform/lang-impl/src/com/intellij/psi/impl/source/tree/injected/EditorWindowImpl.java

@@ -905,4 +905,9 @@ class EditorWindowImpl extends com.intellij.injected.editor.EditorWindowImpl imp
   public void setCustomCursor(@NotNull Object requestor, @Nullable Cursor cursor) {
     myDelegate.setCustomCursor(requestor, cursor);
   }
+
+  @Override
+  public int getAscent() {
+    return myDelegate.getAscent();
+  }
 }

platform/platform-impl/src/com/intellij/openapi/editor/impl/EditorImpl.java

@@ -2063,6 +2063,7 @@ public final class EditorImpl extends UserDataHolderBase implements EditorEx, Hi
     return myCaretCursor.getCaretLocations(onlyIfShown);
   }
 
+  @Override
   public int getAscent() {
     return myView.getAscent();
   }

platform/xdebugger-impl/src/com/intellij/xdebugger/impl/XDebuggerInlayUtil.java

@@ -7,7 +7,6 @@ import com.intellij.openapi.editor.Inlay;
 import com.intellij.openapi.editor.colors.EditorColorsScheme;
 import com.intellij.openapi.editor.colors.FontPreferences;
 import com.intellij.openapi.editor.impl.ComplementaryFontsRegistry;
-import com.intellij.openapi.editor.impl.EditorImpl;
 import com.intellij.openapi.editor.impl.FontInfo;
 import com.intellij.openapi.editor.markup.TextAttributes;
 import com.intellij.openapi.fileEditor.FileEditor;
@@ -145,7 +144,7 @@ public class XDebuggerInlayUtil {
         int xEnd = editor.offsetToXY(value.refEndOffset, false, true).x;
         int width = g.getFontMetrics().stringWidth(value.value);
         curX = Math.max(curX, (xStart + xEnd - width) / 2);
-        g.drawString(value.value, curX, targetRegion.y + ((EditorImpl)editor).getAscent());
+        g.drawString(value.value, curX, targetRegion.y + editor.getAscent());
         g.drawLine(Math.min(xEnd, Math.max(xStart, curX + width / 2)), targetRegion.y, curX + width / 2, targetRegion.y + 2);
         g.drawLine(curX, targetRegion.y + 2, curX + width, targetRegion.y + 2);
         curX += width;