Find/replace overlay: improve replace toggle button appearance

The button to toggle whether the replace bar in a find/replace overlay
is shown currently appears to be a rather heavyweight button with a
border. With this change, the button is replace with a lightweight
toolbar item like used for all other buttons in the overlay. This
improves the appearance as well as the implementation as the same
implementation patterns can now be applied to all buttons in the
overlay.

bundles/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/internal/findandreplace/overlay/FindReplaceOverlay.java

@@ -13,8 +13,6 @@
  *******************************************************************************/
 package org.eclipse.ui.internal.findandreplace.overlay;
 
-import static org.eclipse.ui.internal.findandreplace.overlay.FindReplaceShortcutUtil.registerActionShortcutsAtControl;
-
 import java.util.List;
 import java.util.function.Consumer;
 
@@ -28,7 +26,6 @@
 import org.eclipse.swt.events.FocusEvent;
 import org.eclipse.swt.events.FocusListener;
 import org.eclipse.swt.events.KeyListener;
-import org.eclipse.swt.events.SelectionListener;
 import org.eclipse.swt.events.ShellAdapter;
 import org.eclipse.swt.events.ShellEvent;
 import org.eclipse.swt.graphics.Color;
@@ -37,7 +34,6 @@
 import org.eclipse.swt.graphics.RGBA;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.layout.GridData;
-import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Display;
@@ -117,8 +113,8 @@ private final class KeyboardShortcuts {
 	private boolean replaceBarOpen;
 
 	private Composite container;
-	private Button replaceToggle;
-	private FindReplaceOverlayAction replaceToggleShortcut;
+	private AccessibleToolBar replaceToggleTools;
+	private ToolItem replaceToggle;
 
 	private Composite contentGroup;
 
@@ -474,7 +470,7 @@ private Control createDialog(final Composite parent) {
 	private void initializeSearchShortcutHandlers() {
 		searchTools.registerActionShortcutsAtControl(searchBar);
 		closeTools.registerActionShortcutsAtControl(searchBar);
-		registerActionShortcutsAtControl(replaceToggleShortcut, searchBar);
+		replaceToggleTools.registerActionShortcutsAtControl(searchBar);
 	}
 
 	/**
@@ -712,15 +708,15 @@ private void createMainContainer(final Composite parent) {
 	}
 
 	private void createReplaceToggle() {
-		replaceToggleShortcut = new FindReplaceOverlayAction(this::toggleReplace);
-		replaceToggleShortcut.addShortcuts(KeyboardShortcuts.TOGGLE_REPLACE);
-		replaceToggle = new Button(container, SWT.FLAT | SWT.PUSH);
-		GridDataFactory.fillDefaults().grab(false, true).align(GridData.BEGINNING, GridData.FILL)
-				.applyTo(replaceToggle);
-		replaceToggle.setToolTipText(replaceToggleShortcut
-				.addShortcutHintToTooltipText(FindReplaceMessages.FindReplaceOverlay_replaceToggle_toolTip));
-		replaceToggle.setImage(FindReplaceOverlayImages.get(FindReplaceOverlayImages.KEY_OPEN_REPLACE_AREA));
-		replaceToggle.addSelectionListener(SelectionListener.widgetSelectedAdapter(e -> toggleReplace()));
+		replaceToggleTools = new AccessibleToolBar(container);
+		GridDataFactory.fillDefaults().grab(false, true).align(GridData.CENTER, GridData.CENTER)
+				.applyTo(replaceToggleTools);
+
+		replaceToggle = new AccessibleToolItemBuilder(replaceToggleTools)
+				.withShortcuts(KeyboardShortcuts.TOGGLE_REPLACE)
+				.withImage(FindReplaceOverlayImages.get(FindReplaceOverlayImages.KEY_OPEN_REPLACE_AREA))
+				.withToolTipText(FindReplaceMessages.FindReplaceOverlay_replaceToggle_toolTip)
+				.withOperation(this::toggleReplace).build();
 	}
 
 	private void toggleReplace() {
@@ -765,7 +761,7 @@ private void createReplaceDialog() {
 	private void initializeReplaceShortcutHandlers() {
 		replaceTools.registerActionShortcutsAtControl(replaceBar);
 		closeTools.registerActionShortcutsAtControl(replaceBar);
-		registerActionShortcutsAtControl(replaceToggleShortcut, replaceBar);
+		replaceToggleTools.registerActionShortcutsAtControl(replaceBar);
 	}
 
 	private void enableSearchTools(boolean enable) {
@@ -778,8 +774,8 @@ private void enableReplaceToggle(boolean enable) {
 			return;
 		}
 		boolean visible = enable && findReplaceLogic.getTarget().isEditable();
-		((GridData) replaceToggle.getLayoutData()).exclude = !visible;
-		replaceToggle.setVisible(visible);
+		((GridData) replaceToggleTools.getLayoutData()).exclude = !visible;
+		replaceToggleTools.setVisible(visible);
 	}
 
 	private void enableReplaceTools(boolean enable) {