Implemented Find-Replace Overlay.

In response to issue #1090. Goals for this overlay are a simple
and modern UI/UX for finding/replacing in eclipse.

-- [Modern Find/Replace] Refactor FindReplaceDialog

The FindReplaceDialog's business-logic is now handled in the
FindReplacer.
The FindReplacer communicates using a FindReplaceStatus object which is
polled by FindReplaceDialog as needed and allows for displaying correct
messages in the Interface.

This Refactoring is required so that the business-logic can be reused in
the new FindReplace overlay, as proposed in issue #1090

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

@@ -0,0 +1,35 @@
+/*******************************************************************************
+ * Copyright (c) 2023 Vector Informatik GmbH and others.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Vector Informatik GmbH - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.ui.internal.findandreplace;
+
+public class FindReplaceLogicFindAllStatus implements IFindReplaceLogicStatus {
+	private int selectCount;
+
+	public FindReplaceLogicFindAllStatus(int selectCount) {
+		if (selectCount <= 0) {
+			// invalid value - what to do? Throw an exception?! @HeikoKlare
+		}
+		this.selectCount = selectCount;
+	}
+
+	public int getSelectCount() {
+		return selectCount;
+	}
+
+	@Override
+	public <T> T visit(IFindReplaceLogicStatusVisitor<T> visitor) {
+		return visitor.visit(this);
+	}
+
+}

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

@@ -0,0 +1,40 @@
+/*******************************************************************************
+ * Copyright (c) 2023 Vector Informatik GmbH and others.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Vector Informatik GmbH - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.ui.internal.findandreplace;
+
+/**
+ * Avoid using this class. It is used as a glue to correctly map to the
+ * error-messages generated by RegEx-Errors which are directly displayed in
+ * plain text.
+ *
+ * Prefer using and extending {@link FindReplaceLogicStatus}
+ */
+public class FindReplaceLogicMessage implements IFindReplaceLogicStatus {
+
+	private String message;
+
+	public FindReplaceLogicMessage(String message) {
+		this.message = message;
+	}
+
+	public String getMessage() {
+		return message;
+	}
+
+	@Override
+	public <T> T visit(IFindReplaceLogicStatusVisitor<T> visitor) {
+		return visitor.visit(this);
+	}
+
+}

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

@@ -0,0 +1,70 @@
+/*******************************************************************************
+ * Copyright (c) 2023 Vector Informatik GmbH and others.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Vector Informatik GmbH - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.ui.internal.findandreplace;
+
+import org.eclipse.ui.internal.texteditor.NLSUtility;
+
+public class FindReplaceLogicMessageGenerator implements IFindReplaceLogicStatusVisitor<String> {
+
+	@Override
+	public String visit(IFindReplaceLogicStatus status) {
+		return ""; //$NON-NLS-1$
+	}
+
+	@Override
+	public String visit(FindReplaceLogicReplaceAllStatus status) {
+		int replaceCount = status.getReplaceCount();
+		if (replaceCount == 1) {
+			return FindReplaceMessages.FindReplace_Status_replacement_label;
+		}
+		return NLSUtility.format(FindReplaceMessages.FindReplace_Status_replacements_label, replaceCount);
+	}
+
+	@Override
+	public String visit(FindReplaceLogicStatus status) {
+		FindReplaceLogicStatus.MessageCode messageCode = status.getMessageCode();
+		String message;
+		switch (messageCode) {
+		case NO_MATCH:
+			message = FindReplaceMessages.FindReplace_Status_noMatch_label;
+			break;
+		case WRAPPED:
+			message = FindReplaceMessages.FindReplace_Status_wrapped_label;
+			break;
+		case READONLY:
+			message = FindReplaceMessages.FindReplaceDialog_read_only;
+			break;
+		case NONE:
+		default:
+			message = ""; //$NON-NLS-1$
+		}
+
+		return message;
+	}
+
+	@Override
+	public String visit(FindReplaceLogicMessage status) {
+		return status.getMessage();
+	}
+
+	@Override
+	public String visit(FindReplaceLogicFindAllStatus status) {
+		int selectCount = status.getSelectCount();
+		if (selectCount == 1) {
+			return FindReplaceMessages.FindReplace_Status_selection_label;
+		}
+		return NLSUtility.format(FindReplaceMessages.FindReplace_Status_selections_label, selectCount);
+	}
+
+}

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

@@ -0,0 +1,32 @@
+/*******************************************************************************
+ * Copyright (c) 2023 Vector Informatik GmbH and others.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Vector Informatik GmbH - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.ui.internal.findandreplace;
+
+public class FindReplaceLogicReplaceAllStatus implements IFindReplaceLogicStatus {
+	private int replaceCount;
+
+	public FindReplaceLogicReplaceAllStatus(int replaceCount) {
+		this.replaceCount = replaceCount;
+	}
+
+	public int getReplaceCount() {
+		return replaceCount;
+	}
+
+	@Override
+	public <T> T visit(IFindReplaceLogicStatusVisitor<T> visitor) {
+		return visitor.visit(this);
+	}
+
+}

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

@@ -0,0 +1,38 @@
+/*******************************************************************************
+ * Copyright (c) 2023 Vector Informatik GmbH and others.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Vector Informatik GmbH - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.ui.internal.findandreplace;
+
+public class FindReplaceLogicStatus implements IFindReplaceLogicStatus {
+
+	public enum MessageCode {
+		NO_MATCH,
+		NONE, WRAPPED, READONLY,
+	}
+
+	private MessageCode messageCode;
+
+	public FindReplaceLogicStatus(MessageCode errorCode) {
+		this.messageCode = errorCode;
+	}
+
+	public MessageCode getMessageCode() {
+		return messageCode;
+	}
+
+	@Override
+	public <T> T visit(IFindReplaceLogicStatusVisitor<T> visitor) {
+		return visitor.visit(this);
+	}
+
+}

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

@@ -0,0 +1,66 @@
+/*******************************************************************************
+ * Copyright (c) 2023 Vector Informatik GmbH and others.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Vector Informatik GmbH - initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.ui.internal.findandreplace;
+
+import org.eclipse.osgi.util.NLS;
+
+final public class FindReplaceMessages extends NLS {
+
+	public static final String BUNDLE_NAME = FindReplaceMessages.class.getName();
+
+	private FindReplaceMessages() {
+		// Do not instantiate
+	}
+
+	static {
+		NLS.initializeMessages(BUNDLE_NAME, FindReplaceMessages.class);
+	}
+
+	public static String FindReplace_Status_replacement_label;
+	public static String FindReplace_Status_replacements_label;
+	public static String FindReplace_Status_noMatchWithValue_label;
+	public static String FindReplace_Status_wrapped_label;
+	public static String FindReplaceDialog_read_only;
+	public static String FindReplace_Status_selections_label;
+	public static String FindReplace_Status_selection_label;
+	public static String FindReplace_Status_noMatch_Label;
+	public static String FindReplace_Status_noMatch_label;
+	public static String FindNext_Status_noMatch_label;
+
+	// The "classic" Find/Replace-Dialog
+	public static String FindReplace_Dialog_Title;
+	public static String FindReplace_Find_label;
+	public static String FindReplace_Replace_label;
+	public static String FindReplace_Direction;
+	public static String FindReplace_ForwardRadioButton_label;
+	public static String FindReplace_BackwardRadioButton_label;
+	public static String FindReplace_Scope;
+	public static String FindReplace_GlobalRadioButton_label;
+	public static String FindReplace_SelectedRangeRadioButton_label;
+	public static String FindReplace_Options;
+	public static String FindReplace_CaseCheckBox_label;
+	public static String FindReplace_WrapCheckBox_label;
+	public static String FindReplace_WholeWordCheckBox_label;
+	public static String FindReplace_IncrementalCheckBox_label;
+	public static String FindReplace_RegExCheckbox_label;
+	public static String FindReplace_FindNextButton_label;
+	public static String FindReplace_ReplaceFindButton_label;
+	public static String FindReplace_ReplaceSelectionButton_label;
+	public static String FindReplace_ReplaceAllButton_label;
+	public static String FindReplace_SelectAllButton_label;
+	public static String FindReplace_CloseButton_label;
+
+
+}

bundles/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/internal/findandreplace/FindReplaceMessages.properties

@@ -0,0 +1,47 @@
+################################################################################
+# Copyright (c) 2023 Vector Informatik GmbH and others_
+#
+# This program and the accompanying materials
+# are made available under the terms of the Eclipse Public License 2_0
+# which accompanies this distribution, and is available at
+# https://www_eclipse_org/legal/epl-2_0/
+#
+# SPDX-License-Identifier: EPL-2_0
+#
+# Contributors:
+#     Vector Informatik GmbH - initial API and implementation
+############################################################################
+
+# FindReplace_Status_noMatch_label=String not found
+FindReplace_Status_noMatchWithValue_label=String {0} not found
+FindReplace_Status_replacement_label=1 match replaced
+FindReplace_Status_replacements_label={0} matches replaced
+FindReplace_Status_selection_label=1 match selected
+FindReplace_Status_selections_label={0} matches selected
+FindReplace_Status_wrapped_label=Wrapped search
+FindReplace_Status_noMatch_label=String not found
+FindNext_Status_noMatch_label=String {0} not found
+FindReplaceDialog_read_only=Cannot replace. File is read-only.
+
+# Messages for the "classic" Find-Replace-Dialog
+FindReplace_Dialog_Title= Find/Replace
+FindReplace_Find_label=&Find:
+FindReplace_Replace_label=R&eplace with:
+FindReplace_Direction=Direction
+FindReplace_ForwardRadioButton_label=F&orward
+FindReplace_BackwardRadioButton_label=&Backward
+FindReplace_Scope=Scope
+FindReplace_GlobalRadioButton_label=A&ll
+FindReplace_SelectedRangeRadioButton_label=Selec&ted lines
+FindReplace_Options=Options
+FindReplace_CaseCheckBox_label=&Case sensitive
+FindReplace_WrapCheckBox_label=Wra&p search
+FindReplace_WholeWordCheckBox_label=&Whole word
+FindReplace_IncrementalCheckBox_label=&Incremental
+FindReplace_RegExCheckbox_label= Regular e&xpressions
+FindReplace_FindNextButton_label=Fi&nd
+FindReplace_ReplaceFindButton_label=Replace/Fin&d
+FindReplace_ReplaceSelectionButton_label=&Replace
+FindReplace_ReplaceAllButton_label=Replace &All
+FindReplace_SelectAllButton_label=&Select All
+FindReplace_CloseButton_label=Close