feat: add Fold All/Unfold All commands to Generic Editor

org.eclipse.lsp4e/META-INF/MANIFEST.MF

@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: Language Server Protocol client for Eclipse IDE (Incubation)
 Bundle-SymbolicName: org.eclipse.lsp4e;singleton:=true
-Bundle-Version: 0.18.30.qualifier
+Bundle-Version: 0.18.31.qualifier
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Require-Bundle: org.eclipse.core.runtime;bundle-version="3.12.0",
  org.eclipse.equinox.common;bundle-version="3.8.0",

org.eclipse.lsp4e/plugin.properties

@@ -47,4 +47,9 @@ command.open.quick.type.hierarchy.description = Open Quick Call Hierarchy for th
 view.callHierarchy.name = Call Hierarchy
 view.typeHierarchy.name = Type Hierarchy
 view.languageServers.name = Language Servers
-viewsCategory.name = Language Servers
+viewsCategory.name = Language Servers
+
+# Folding commands
+command.folding.foldAll.name = Fold All
+command.folding.unfoldAll.name = Unfold All
+menu.folding.name = Folding

org.eclipse.lsp4e/plugin.xml

@@ -154,6 +154,106 @@
       </foldingReconcilingStrategy>
    </extension>
 
+   <!-- folding: define commands -->
+   <extension point="org.eclipse.ui.commands">
+      <command
+            categoryId="org.eclipse.lsp4e.category"
+            id="org.eclipse.lsp4e.folding.collapseAll"
+            name="%command.folding.foldAll.name" />
+      <command
+            categoryId="org.eclipse.lsp4e.category"
+            id="org.eclipse.lsp4e.folding.expandAll"
+            name="%command.folding.unfoldAll.name" />
+   </extension>
+
+   <!-- folding: register command handlers -->
+   <extension point="org.eclipse.ui.handlers">
+      <handler
+            class="org.eclipse.lsp4e.operations.folding.FoldAllHandler"
+            commandId="org.eclipse.lsp4e.folding.collapseAll">
+         <activeWhen>
+            <or>
+               <reference definitionId="org.eclipse.lsp4e.textSelectionHasLanguageServer" />
+               <reference definitionId="org.eclipse.lsp4e.editorHasLanguageServer" />
+            </or>
+         </activeWhen>
+      </handler>
+      <handler
+            class="org.eclipse.lsp4e.operations.folding.UnfoldAllHandler"
+            commandId="org.eclipse.lsp4e.folding.expandAll">
+         <activeWhen>
+            <or>
+               <reference definitionId="org.eclipse.lsp4e.textSelectionHasLanguageServer" />
+               <reference definitionId="org.eclipse.lsp4e.editorHasLanguageServer" />
+            </or>
+         </activeWhen>
+      </handler>
+   </extension>
+
+   <!-- folding: register menu entries -->
+   <extension point="org.eclipse.ui.menus">
+      <menuContribution
+            allPopups="true"
+            locationURI="popup:org.eclipse.ui.genericeditor.source.menu?after=additions">
+         <separator name="org.eclipse.lsp4e.folding.group.start" visible="true"/>
+         <command commandId="org.eclipse.lsp4e.folding.collapseAll" label="%command.folding.foldAll.name">
+            <visibleWhen>
+               <reference definitionId="org.eclipse.lsp4e.textSelectionHasLanguageServer" />
+            </visibleWhen>
+         </command>
+         <command commandId="org.eclipse.lsp4e.folding.expandAll" label="%command.folding.unfoldAll.name">
+            <visibleWhen>
+               <reference definitionId="org.eclipse.lsp4e.textSelectionHasLanguageServer" />
+            </visibleWhen>
+         </command>
+         <separator name="org.eclipse.lsp4e.folding.group.end" visible="true"/>
+      </menuContribution>
+   </extension>
+
+   <!-- folding: add commands to main Window > Source menu contributed by TM4E -->
+   <extension point="org.eclipse.ui.menus">
+      <menuContribution locationURI="menu:org.eclipse.tm4e.source.menu?after=additions">
+         <separator name="org.eclipse.lsp4e.folding.main.group.start" visible="true"/>
+         <command commandId="org.eclipse.lsp4e.folding.collapseAll" label="%command.folding.foldAll.name">
+            <visibleWhen>
+               <or>
+                  <with variable="activeEditorInput">
+                     <test property="org.eclipse.lsp4e.hasLanguageServer" />
+                  </with>
+                  <with variable="activeEditor">
+                     <test property="org.eclipse.lsp4e.hasLanguageServer" />
+                  </with>
+               </or>
+            </visibleWhen>
+         </command>
+         <command commandId="org.eclipse.lsp4e.folding.expandAll" label="%command.folding.unfoldAll.name">
+            <visibleWhen>
+               <or>
+                  <with variable="activeEditorInput">
+                     <test property="org.eclipse.lsp4e.hasLanguageServer" />
+                  </with>
+                  <with variable="activeEditor">
+                     <test property="org.eclipse.lsp4e.hasLanguageServer" />
+                  </with>
+               </or>
+            </visibleWhen>
+         </command>
+         <separator name="org.eclipse.lsp4e.folding.main.group.end" visible="true"/>
+      </menuContribution>
+   </extension>
+
+   <!-- folding: key bindings -->
+   <extension point="org.eclipse.ui.bindings">
+      <key sequence="M1+M2+NUMPAD_DIVIDE"
+            commandId="org.eclipse.lsp4e.folding.collapseAll"
+            contextId="org.eclipse.ui.genericeditor.genericEditorContext"
+            schemeId="org.eclipse.ui.defaultAcceleratorConfiguration" />
+      <key sequence="M1+M2+NUMPAD_MULTIPLY"
+            commandId="org.eclipse.lsp4e.folding.expandAll"
+            contextId="org.eclipse.ui.genericeditor.genericEditorContext"
+            schemeId="org.eclipse.ui.defaultAcceleratorConfiguration" />
+   </extension>
+
 
    <!-- ===================================== -->
    <!-- Find References Support               -->
@@ -464,7 +564,7 @@
             contentType="org.eclipse.core.runtime.text">
          <enabledWhen>
             <reference definitionId="org.eclipse.lsp4e.editorHasLanguageServer" />
-         </enabledWhen>            
+         </enabledWhen>
       </reconcilingStrategy>
    </extension>
 

org.eclipse.lsp4e/pom.xml

@@ -10,7 +10,7 @@
 	</parent>
 	<artifactId>org.eclipse.lsp4e</artifactId>
 	<packaging>eclipse-plugin</packaging>
-	<version>0.18.30-SNAPSHOT</version>
+	<version>0.18.31-SNAPSHOT</version>
 
 	<build>
 		<plugins>

org.eclipse.lsp4e/src/org/eclipse/lsp4e/operations/folding/FoldAllHandler.java

@@ -0,0 +1,29 @@
+/*******************************************************************************
+ * Copyright (c) 2025 Vegard IT GmbH and others.
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *  Sebastian Thomschke (Vegard IT GmbH) - initial implementation.
+ *******************************************************************************/
+package org.eclipse.lsp4e.operations.folding;
+
+import org.eclipse.core.commands.AbstractHandler;
+import org.eclipse.core.commands.ExecutionEvent;
+import org.eclipse.jdt.annotation.Nullable;
+import org.eclipse.jface.text.source.projection.ProjectionViewer;
+import org.eclipse.lsp4e.ui.UI;
+
+public class FoldAllHandler extends AbstractHandler {
+
+	@Override
+	public @Nullable Object execute(final ExecutionEvent event) {
+		if (UI.getActiveTextViewer() instanceof final ProjectionViewer viewer && viewer.isProjectionMode()) {
+			UI.runOnUIThread(() -> viewer.doOperation(ProjectionViewer.COLLAPSE_ALL));
+		}
+		return null;
+	}
+}

org.eclipse.lsp4e/src/org/eclipse/lsp4e/operations/folding/UnfoldAllHandler.java

@@ -0,0 +1,29 @@
+/*******************************************************************************
+ * Copyright (c) 2025 Vegard IT GmbH and others.
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *  Sebastian Thomschke (Vegard IT GmbH) - initial implementation.
+ *******************************************************************************/
+package org.eclipse.lsp4e.operations.folding;
+
+import org.eclipse.core.commands.AbstractHandler;
+import org.eclipse.core.commands.ExecutionEvent;
+import org.eclipse.jdt.annotation.Nullable;
+import org.eclipse.jface.text.source.projection.ProjectionViewer;
+import org.eclipse.lsp4e.ui.UI;
+
+public class UnfoldAllHandler extends AbstractHandler {
+
+	@Override
+	public @Nullable Object execute(final ExecutionEvent event) {
+		if (UI.getActiveTextViewer() instanceof final ProjectionViewer viewer && viewer.isProjectionMode()) {
+			UI.runOnUIThread(() -> viewer.doOperation(ProjectionViewer.EXPAND_ALL));
+		}
+		return null;
+	}
+}