From 6aa63c362c4974a108a1faaf79887e4839e869a7 Mon Sep 17 00:00:00 2001
From: Maximilian Wittmer <Maximilian.Wittmer@vector.com>
Date: Fri, 19 Jul 2024 13:38:59 +0200
Subject: [PATCH] Find/Replace overlay: add content assist in RegEx mode

Adds a content assist feature when the Overlay is in RegEx mode.
Uses the same content proposals as the find/replace dialog.
---
 .../overlay/FindReplaceOverlay.java           | 30 ++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/bundles/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/internal/findandreplace/overlay/FindReplaceOverlay.java b/bundles/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/internal/findandreplace/overlay/FindReplaceOverlay.java
index d9f8cda37f6..060e365d62a 100644
--- a/bundles/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/internal/findandreplace/overlay/FindReplaceOverlay.java
+++ b/bundles/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/internal/findandreplace/overlay/FindReplaceOverlay.java
@@ -53,12 +53,14 @@
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.dialogs.IPageChangedListener;
 import org.eclipse.jface.dialogs.PageChangedEvent;
+import org.eclipse.jface.fieldassist.TextContentAdapter;
 import org.eclipse.jface.layout.GridDataFactory;
 import org.eclipse.jface.layout.GridLayoutFactory;
 import org.eclipse.jface.resource.JFaceColors;
 import org.eclipse.jface.window.Window;
 
 import org.eclipse.jface.text.FindReplaceDocumentAdapter;
+import org.eclipse.jface.text.FindReplaceDocumentAdapterContentProposalProvider;
 import org.eclipse.jface.text.IFindReplaceTarget;
 import org.eclipse.jface.text.IFindReplaceTargetExtension;
 import org.eclipse.jface.text.ITextViewer;
@@ -67,6 +69,7 @@
 import org.eclipse.ui.IWorkbenchPart;
 import org.eclipse.ui.IWorkbenchPartReference;
 import org.eclipse.ui.PlatformUI;
+import org.eclipse.ui.fieldassist.ContentAssistCommandAdapter;
 import org.eclipse.ui.internal.findandreplace.FindReplaceLogic;
 import org.eclipse.ui.internal.findandreplace.FindReplaceMessages;
 import org.eclipse.ui.internal.findandreplace.HistoryStore;
@@ -75,6 +78,7 @@
 import org.eclipse.ui.part.MultiPageEditorSite;
 
 import org.eclipse.ui.texteditor.IAbstractTextEditorHelpContextIds;
+import org.eclipse.ui.texteditor.ITextEditorActionDefinitionIds;
 import org.eclipse.ui.texteditor.StatusTextEditor;
 
 public class FindReplaceOverlay extends Dialog {
@@ -143,6 +147,7 @@ private final class KeyboardShortcuts {
 	private Color normalTextForegroundColor;
 	private boolean positionAtTop = true;
 	private final TargetPartVisibilityHandler targetPartVisibilityHandler;
+	private ContentAssistCommandAdapter contentAssistSearchField, contentAssistReplaceField;
 
 	public FindReplaceOverlay(Shell parent, IWorkbenchPart part, IFindReplaceTarget target) {
 		super(parent);
@@ -360,7 +365,8 @@ public int open() {
 
 		getShell().layout();
 		updatePlacementAndVisibility();
-
+		updateContentAssistAvailability();
+		searchBar.forceFocus();
 		return returnCode;
 	}
 
@@ -537,6 +543,7 @@ private void createRegexSearchButton() {
 					activateInFindReplacerIf(SearchOptions.REGEX, regexSearchButton.getSelection());
 					wholeWordSearchButton.setEnabled(!findReplaceLogic.isActive(SearchOptions.REGEX));
 					updateIncrementalSearch();
+					updateContentAssistAvailability();
 				}).withShortcuts(KeyboardShortcuts.OPTION_REGEX).build();
 		regexSearchButton.setSelection(findReplaceLogic.isActive(SearchOptions.REGEX));
 	}
@@ -594,6 +601,14 @@ private void createReplaceTools() {
 				}).withShortcuts(KeyboardShortcuts.SEARCH_ALL).build();
 	}
 
+	private ContentAssistCommandAdapter createContentAssistField(HistoryTextWrapper control, boolean isFind) {
+		TextContentAdapter contentAdapter = new TextContentAdapter();
+		FindReplaceDocumentAdapterContentProposalProvider findProposer = new FindReplaceDocumentAdapterContentProposalProvider(
+				isFind);
+		return new ContentAssistCommandAdapter(control.getTextBar(), contentAdapter, findProposer,
+				ITextEditorActionDefinitionIds.CONTENT_ASSIST_PROPOSALS, new char[0], true);
+	}
+
 	private void createSearchBar() {
 		HistoryStore searchHistory = new HistoryStore(getDialogSettings(), "searchhistory", //$NON-NLS-1$
 				HISTORY_SIZE);
@@ -624,6 +639,7 @@ public void focusLost(FocusEvent e) {
 
 		});
 		searchBar.setMessage(FindReplaceMessages.FindReplaceOverlay_searchBar_message);
+		contentAssistSearchField = createContentAssistField(searchBar, true);
 	}
 
 	private void updateIncrementalSearch() {
@@ -645,6 +661,7 @@ private void createReplaceBar() {
 			replaceBar.setForeground(normalTextForegroundColor);
 			searchBar.setForeground(normalTextForegroundColor);
 		}));
+		contentAssistReplaceField = createContentAssistField(replaceBar, false);
 	}
 
 	private void createFindContainer() {
@@ -993,4 +1010,15 @@ private void removeSearchScope() {
 		findReplaceLogic.activate(SearchOptions.GLOBAL);
 		searchInSelectionButton.setSelection(false);
 	}
+
+	private void setContentAssistsEnablement(boolean enable) {
+		contentAssistSearchField.setEnabled(enable);
+		if (okayToUse(replaceBar)) {
+			contentAssistReplaceField.setEnabled(enable);
+		}
+	}
+
+	private void updateContentAssistAvailability() {
+		setContentAssistsEnablement(findReplaceLogic.isRegExSearchAvailableAndActive());
+	}
 }
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