introduce getMouseHover, getMouseOut and getMouseMove in ICodeMining

This change allows code mining implementors to react on mouse move
events and call setCursor on the text widget for example.

Author: tobias-melcher

bundles/org.eclipse.jface.text/src/org/eclipse/jface/internal/text/codemining/CodeMiningLineContentAnnotation.java

@@ -70,11 +70,7 @@ public class CodeMiningLineContentAnnotation extends LineContentAnnotation imple
 	 * @param viewer   the viewer
 	 */
 	public CodeMiningLineContentAnnotation(Position position, ISourceViewer viewer) {
-		super(position, viewer);
-		fResolvedMinings= null;
-		fMinings= new ArrayList<>();
-		fBounds= new ArrayList<>();
-		afterPosition= false;
+		this(position, viewer, false);
 	}
 
 	/**
@@ -84,7 +80,23 @@ public CodeMiningLineContentAnnotation(Position position, ISourceViewer viewer)
 	 * @param viewer the viewer
 	 */
 	public CodeMiningLineContentAnnotation(Position position, ISourceViewer viewer, boolean afterPosition) {
-		super(position, viewer);
+		this(position, viewer, afterPosition, null, null, null);
+	}
+
+	/**
+	 * Code mining annotation constructor.
+	 *
+	 * @param position the position
+	 * @param viewer the viewer
+	 * @param onMouseHover the consumer to be called on mouse hover. If set, the implementor needs
+	 *            to take care of setting the cursor if wanted.
+	 * @param onMouseOut the consumer to be called on mouse out. If set, the implementor needs to
+	 *            take care of resetting the cursor.
+	 * @param onMouseMove the consumer to be called on mouse move
+	 */
+	public CodeMiningLineContentAnnotation(Position position, ISourceViewer viewer, boolean afterPosition, Consumer<MouseEvent> onMouseHover, Consumer<MouseEvent> onMouseOut,
+			Consumer<MouseEvent> onMouseMove) {
+		super(position, viewer, onMouseHover, onMouseOut, onMouseMove);
 		fResolvedMinings= null;
 		fMinings= new ArrayList<>();
 		fBounds= new ArrayList<>();

bundles/org.eclipse.jface.text/src/org/eclipse/jface/internal/text/codemining/CodeMiningLineHeaderAnnotation.java

@@ -69,7 +69,22 @@ public class CodeMiningLineHeaderAnnotation extends LineHeaderAnnotation impleme
 	 * @param viewer the viewer
 	 */
 	public CodeMiningLineHeaderAnnotation(Position position, ISourceViewer viewer) {
-		super(position, viewer);
+		this(position, viewer, null, null, null);
+	}
+
+	/**
+	 * Code mining annotation constructor.
+	 *
+	 * @param position the position
+	 * @param viewer the viewer
+	 * @param onMouseHover the consumer to be called on mouse hover. If set, the implementor needs
+	 *            to take care of setting the cursor if wanted.
+	 * @param onMouseOut the consumer to be called on mouse out. If set, the implementor needs to
+	 *            take care of resetting the cursor.
+	 * @param onMouseMove the consumer to be called on mouse move
+	 */
+	public CodeMiningLineHeaderAnnotation(Position position, ISourceViewer viewer, Consumer<MouseEvent> onMouseHover, Consumer<MouseEvent> onMouseOut, Consumer<MouseEvent> onMouseMove) {
+		super(position, viewer, onMouseHover, onMouseOut, onMouseMove);
 		fResolvedMinings= null;
 		fMinings= new ArrayList<>();
 		fBounds= new ArrayList<>();

bundles/org.eclipse.jface.text/src/org/eclipse/jface/internal/text/codemining/CodeMiningManager.java

@@ -23,11 +23,13 @@
 import java.util.Set;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.CompletableFuture;
+import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
 import org.osgi.framework.Bundle;
 
+import org.eclipse.swt.events.MouseEvent;
 import org.eclipse.swt.graphics.Rectangle;
 
 import org.eclipse.core.runtime.Assert;
@@ -262,7 +264,12 @@ private void renderCodeMinings(Map<Position, List<ICodeMining>> groups, ISourceV
 				if (first instanceof LineContentCodeMining m) {
 					afterPosition= m.isAfterPosition();
 				}
-				ann= inLineHeader ? new CodeMiningLineHeaderAnnotation(pos, viewer) : new CodeMiningLineContentAnnotation(pos, viewer, afterPosition);
+				Consumer<MouseEvent> mouseHover= first != null ? first.getMouseHover() : null;
+				Consumer<MouseEvent> mouseOut= first != null ? first.getMouseOut() : null;
+				Consumer<MouseEvent> mouseMove= first != null ? first.getMouseMove() : null;
+				ann= inLineHeader
+						? new CodeMiningLineHeaderAnnotation(pos, viewer, mouseHover, mouseOut, mouseMove)
+						: new CodeMiningLineContentAnnotation(pos, viewer, afterPosition, mouseHover, mouseOut, mouseMove);
 			} else if (ann instanceof ICodeMiningAnnotation && ((ICodeMiningAnnotation) ann).isInVisibleLines()) {
 				// annotation is in visible lines
 				annotationsToRedraw.add((ICodeMiningAnnotation) ann);

bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/codemining/ICodeMining.java

@@ -16,6 +16,7 @@
 import java.util.concurrent.CompletableFuture;
 import java.util.function.Consumer;
 
+import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.StyledText;
 import org.eclipse.swt.events.MouseEvent;
 import org.eclipse.swt.graphics.Color;
@@ -115,6 +116,37 @@ public interface ICodeMining {
 	 */
 	Consumer<MouseEvent> getAction();
 
+	/**
+	 * Returns a consumer which is called when mouse is hovered over the code mining. If set, the
+	 * implementor needs to take care of setting the cursor if wanted.
+	 */
+	default Consumer<MouseEvent> getMouseHover() {
+		return e -> {
+			if (e.widget instanceof StyledText st) {
+				st.setCursor(st.getDisplay().getSystemCursor(SWT.CURSOR_HAND));
+			}
+		};
+	}
+
+	/**
+	 * Returns a consumer which is called when mouse is moved out of code mining. If set, the
+	 * implementor needs to take care of resetting the cursor.
+	 */
+	default Consumer<MouseEvent> getMouseOut() {
+		return e -> {
+			if (e.widget instanceof StyledText st) {
+				st.setCursor(null);
+			}
+		};
+	}
+
+	/**
+	 * Returns a consumer which is called when mouse is moved inside the code mining.
+	 */
+	default Consumer<MouseEvent> getMouseMove() {
+		return null;
+	}
+
 	/**
 	 * Dispose the mining. Typically shuts down or cancels all related asynchronous operations.
 	 */

bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/inlined/AbstractInlinedAnnotation.java

@@ -62,15 +62,39 @@ public abstract class AbstractInlinedAnnotation extends Annotation {
 
 	int fY;
 
+	private final Consumer<MouseEvent> onMouseHover;
+
+	private final Consumer<MouseEvent> onMouseOut;
+
+	private final Consumer<MouseEvent> onMouseMove;
+
 	/**
 	 * Inlined annotation constructor.
 	 *
 	 * @param position the position where the annotation must be drawn.
-	 * @param viewer   the {@link ISourceViewer} where the annotation must be drawn.
+	 * @param viewer the {@link ISourceViewer} where the annotation must be drawn.
 	 */
 	protected AbstractInlinedAnnotation(Position position, ISourceViewer viewer) {
+		this(position, viewer, null, null, null);
+	}
+
+	/**
+	 * Inlined annotation constructor.
+	 *
+	 * @param position the position where the annotation must be drawn.
+	 * @param viewer the {@link ISourceViewer} where the annotation must be drawn.
+	 * @param onMouseHover the consumer to be called on mouse hover. If set, the implementor needs
+	 *            to take care of setting the cursor if wanted.
+	 * @param onMouseOut the consumer to be called on mouse out. If set, the implementor needs to
+	 *            take care of resetting the cursor.
+	 * @param onMouseMove the consumer to be called on mouse move
+	 */
+	protected AbstractInlinedAnnotation(Position position, ISourceViewer viewer, Consumer<MouseEvent> onMouseHover, Consumer<MouseEvent> onMouseOut, Consumer<MouseEvent> onMouseMove) {
 		super(TYPE, false, ""); //$NON-NLS-1$
 		this.position= position;
+		this.onMouseHover= onMouseHover;
+		this.onMouseOut= onMouseOut;
+		this.onMouseMove= onMouseMove;
 	}
 
 	/**
@@ -165,8 +189,23 @@ public void draw(GC gc, StyledText textWidget, int widgetOffset, int length, Col
 	 * @param e the mouse event
 	 */
 	public void onMouseHover(MouseEvent e) {
-		StyledText styledText= (StyledText) e.widget;
-		styledText.setCursor(styledText.getDisplay().getSystemCursor(SWT.CURSOR_HAND));
+		if (onMouseHover != null) {
+			onMouseHover.accept(e);
+		} else {
+			StyledText styledText= (StyledText) e.widget;
+			styledText.setCursor(styledText.getDisplay().getSystemCursor(SWT.CURSOR_HAND));
+		}
+	}
+
+	/**
+	 * Called when mouse moved in the inlined annotation.
+	 *
+	 * @param e the mouse event
+	 */
+	public void onMouseMove(MouseEvent e) {
+		if (onMouseMove != null) {
+			onMouseMove.accept(e);
+		}
 	}
 
 	/**
@@ -175,8 +214,12 @@ public void onMouseHover(MouseEvent e) {
 	 * @param e the mouse event
 	 */
 	public void onMouseOut(MouseEvent e) {
-		StyledText styledText= (StyledText) e.widget;
-		styledText.setCursor(null);
+		if (onMouseOut != null) {
+			onMouseOut.accept(e);
+		} else {
+			StyledText styledText= (StyledText) e.widget;
+			styledText.setCursor(null);
+		}
 	}
 
 	/**

bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/inlined/InlinedAnnotationDrawingStrategy.java

@@ -198,9 +198,17 @@ private static void draw(LineHeaderAnnotation annotation, GC gc, StyledText text
 			annotation.draw(gc, textWidget, offset, length, color, x, y);
 		} else if (textWidget.getLineVerticalIndent(line) > 0) {
 			// Here vertical indent is done, the redraw of the full line width is done to avoid annotation clipping
-			Rectangle bounds= textWidget.getTextBounds(offset, offset);
 			Rectangle client= textWidget.getClientArea();
-			textWidget.redraw(0, bounds.y, client.width, bounds.height, false);
+			int y, height;
+			if (offset < charCount) {
+				Rectangle bounds= textWidget.getTextBounds(offset, offset);
+				y= bounds.y;
+				height= bounds.height;
+			} else {
+				y= 0;
+				height= client.height;
+			}
+			textWidget.redraw(0, y, client.width, height, false);
 		} else {
 			if (offset >= charCount) {
 				if (charCount > 0) {

bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/inlined/InlinedAnnotationSupport.java

@@ -290,7 +290,7 @@ public void mouseMove(MouseEvent e) {
 			update(e);
 			if (oldAnnotation != null) {
 				if (oldAnnotation.equals(fAnnotation)) {
-					// Same annotations which was hovered, do nothing.
+					fAnnotation.onMouseMove(e);
 					return;
 				} else {
 					oldAnnotation.onMouseOut(e);

bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/inlined/LineContentAnnotation.java

@@ -13,8 +13,11 @@
  */
 package org.eclipse.jface.text.source.inlined;
 
+import java.util.function.Consumer;
+
 import org.eclipse.swt.custom.StyleRange;
 import org.eclipse.swt.custom.StyledText;
+import org.eclipse.swt.events.MouseEvent;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.FontMetrics;
 import org.eclipse.swt.graphics.GC;
@@ -48,7 +51,22 @@ public class LineContentAnnotation extends AbstractInlinedAnnotation {
 	 * @param viewer   the {@link ISourceViewer} where the annotation must be drawn.
 	 */
 	public LineContentAnnotation(Position position, ISourceViewer viewer) {
-		super(position, viewer);
+		this(position, viewer, null, null, null);
+	}
+
+	/**
+	 * Line content annotation constructor.
+	 *
+	 * @param position the position where the annotation must be drawn.
+	 * @param viewer the {@link ISourceViewer} where the annotation must be drawn.
+	 * @param onMouseHover the consumer to be called on mouse hover. If set, the implementor needs
+	 *            to take care of setting the cursor if wanted.
+	 * @param onMouseOut the consumer to be called on mouse out. If set, the implementor needs to
+	 *            take care of resetting the cursor.
+	 * @param onMouseMove the consumer to be called on mouse move
+	 */
+	public LineContentAnnotation(Position position, ISourceViewer viewer, Consumer<MouseEvent> onMouseHover, Consumer<MouseEvent> onMouseOut, Consumer<MouseEvent> onMouseMove) {
+		super(position, viewer, onMouseHover, onMouseOut, onMouseMove);
 	}
 
 	/**

bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/inlined/LineHeaderAnnotation.java

@@ -13,7 +13,10 @@
  */
 package org.eclipse.jface.text.source.inlined;
 
+import java.util.function.Consumer;
+
 import org.eclipse.swt.custom.StyledText;
+import org.eclipse.swt.events.MouseEvent;
 
 import org.eclipse.jface.text.Position;
 import org.eclipse.jface.text.source.ISourceViewer;
@@ -34,7 +37,22 @@ public class LineHeaderAnnotation extends AbstractInlinedAnnotation {
 	 * @param viewer the {@link ISourceViewer} where the annotation must be drawn.
 	 */
 	public LineHeaderAnnotation(Position position, ISourceViewer viewer) {
-		super(position, viewer);
+		this(position, viewer, null, null, null);
+	}
+
+	/**
+	 * Line header annotation constructor.
+	 *
+	 * @param position the position where the annotation must be drawn.
+	 * @param viewer the {@link ISourceViewer} where the annotation must be drawn.
+	 * @param onMouseHover the consumer to be called on mouse hover. If set, the implementor needs
+	 *            to take care of setting the cursor if wanted.
+	 * @param onMouseOut the consumer to be called on mouse out. If set, the implementor needs to
+	 *            take care of resetting the cursor.
+	 * @param onMouseMove the consumer to be called on mouse move
+	 */
+	public LineHeaderAnnotation(Position position, ISourceViewer viewer, Consumer<MouseEvent> onMouseHover, Consumer<MouseEvent> onMouseOut, Consumer<MouseEvent> onMouseMove) {
+		super(position, viewer, onMouseHover, onMouseOut, onMouseMove);
 		oldLine= -1;
 	}