javadocs

platform/platform-impl/src/com/intellij/openapi/editor/impl/view/EditorCoordinateMapper.java

@@ -24,6 +24,13 @@ import org.jetbrains.annotations.NotNull;
 
 import java.awt.*;
 
+/**
+ * Performs transformations between various location representations in editor 
+ * (offset, logical position, visual position, pixel coordinates).
+ * 
+ * @see LogicalPosition
+ * @see VisualPosition
+ */
 class EditorCoordinateMapper {
   private final EditorView myView;
   private final Document myDocument;

platform/platform-impl/src/com/intellij/openapi/editor/impl/view/EditorPainter.java

@@ -43,6 +43,9 @@ import javax.swing.*;
 import java.awt.*;
 import java.util.Collection;
 
+/**
+ * Renders editor contents.
+ */
 class EditorPainter {
   private static final Stroke IME_COMPOSED_TEXT_UNDERLINE_STROKE = new BasicStroke(1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND, 0,
                                                                                    new float[]{0, 2, 0, 2}, 0);

platform/platform-impl/src/com/intellij/openapi/editor/impl/view/EditorSizeManager.java

@@ -34,6 +34,9 @@ import org.jetbrains.annotations.NotNull;
 import java.awt.*;
 import java.util.Collection;
 
+/**
+ * Calculates width (in pixels) of editor contents.
+ */
 class EditorSizeManager implements PrioritizedDocumentListener, Disposable, FoldingListener {
   private final EditorView myView;
   private final EditorImpl myEditor;

platform/platform-impl/src/com/intellij/openapi/editor/impl/view/FontLayoutService.java

@@ -23,6 +23,10 @@ import java.awt.*;
 import java.awt.font.FontRenderContext;
 import java.awt.font.GlyphVector;
 
+/**
+ * Encapsulates logic related to font metrics. Mock instance can be used in tests to make them independent on font properties on particular
+ * platform.
+ */
 public abstract class FontLayoutService {
   private static final FontLayoutService DEFAULT_INSTANCE = new DefaultFontLayoutService();
   private static FontLayoutService INSTANCE = DEFAULT_INSTANCE;

platform/platform-impl/src/com/intellij/openapi/editor/impl/view/IterationState.java

@@ -42,6 +42,10 @@ import java.util.Arrays;
 import java.util.Comparator;
 import java.util.List;
 
+/**
+ * Iterator over editor's text contents. Each iteration step corresponds to a text fragment having common graphical attributes 
+ * (font style, foreground and background color, effect type and color).  
+ */
 // This class should replace com.intellij.openapi.editor.impl.IterationState when new editor rendering engine will become default
 public class IterationState {
   private static final Logger LOG = Logger.getInstance(IterationState.class);

platform/platform-impl/src/com/intellij/openapi/editor/impl/view/VisualLineFragmentsIterator.java

@@ -25,6 +25,10 @@ import java.awt.*;
 import java.util.Iterator;
 import java.util.NoSuchElementException;
 
+/**
+ * Iterator over visual line's fragments. Fragment's text has the same font and directionality. Collapsed fold regions are also represented
+ * as fragments.
+ */
 class VisualLineFragmentsIterator implements Iterator<VisualLineFragmentsIterator.Fragment> {
 
   static Iterable<Fragment> create(final EditorView view, final int offset) {