Add hotkey for expand/collapse project tree

ide/che-core-ide-api/src/main/java/org/eclipse/che/ide/api/data/tree/TreeExpander.java

@@ -0,0 +1,47 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2016 Codenvy, S.A.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.ide.api.data.tree;
+
+import com.google.common.annotations.Beta;
+
+/**
+ * Component which performs basic tree operation such as expand and collapse.
+ *
+ * @author Vlad Zhukovskyi
+ * @since 5.0.0
+ */
+@Beta
+public interface TreeExpander {
+
+    /**
+     * Perform tree expand in case if {@link #isExpandEnabled()} returns {@code true}.
+     */
+    void expandTree();
+
+    /**
+     * Returns {@code true} in case if tree expand is possible.
+     *
+     * @return {@code true} in case if tree expand is possible, otherwise {@code false}
+     */
+    boolean isExpandEnabled();
+
+    /**
+     * Perform tree collapse in case if {@link #isCollapseEnabled()} returns {@code true}.
+     */
+    void collapseTree();
+
+    /**
+     * Returns {@code true} in case if tree collapse is possible.
+     *
+     * @return {@code true} in case if tree collapse is possible, otherwise {@code false}
+     */
+    boolean isCollapseEnabled();
+}

ide/che-core-ide-app/src/main/java/org/eclipse/che/ide/actions/common/CollapseTreeAction.java

@@ -0,0 +1,53 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2016 Codenvy, S.A.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.ide.actions.common;
+
+import org.eclipse.che.ide.api.action.Action;
+import org.eclipse.che.ide.api.action.ActionEvent;
+import org.eclipse.che.ide.api.data.tree.TreeExpander;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Base tree collapse action which consumes instance of {@link TreeExpander}.
+ *
+ * @author Vlad Zhukovskyi
+ * @see TreeExpander
+ * @since 5.0.0
+ */
+public abstract class CollapseTreeAction extends Action {
+
+    public abstract TreeExpander getTreeExpander();
+
+    public CollapseTreeAction() {
+        super("Collapse All");
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        final TreeExpander treeExpander = getTreeExpander();
+
+        checkNotNull(treeExpander);
+
+        if (!treeExpander.isCollapseEnabled()) {
+            return;
+        }
+
+        treeExpander.collapseTree();
+    }
+
+    @Override
+    public void update(ActionEvent e) {
+        final TreeExpander treeExpander = getTreeExpander();
+
+        e.getPresentation().setEnabledAndVisible(treeExpander.isCollapseEnabled());
+    }
+}

ide/che-core-ide-app/src/main/java/org/eclipse/che/ide/actions/common/ExpandTreeAction.java

@@ -0,0 +1,53 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2016 Codenvy, S.A.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.ide.actions.common;
+
+import org.eclipse.che.ide.api.action.Action;
+import org.eclipse.che.ide.api.action.ActionEvent;
+import org.eclipse.che.ide.api.data.tree.TreeExpander;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Base tree expand action which consumes instance of {@link TreeExpander}.
+ *
+ * @author Vlad Zhukovskyi
+ * @see TreeExpander
+ * @since 5.0.0
+ */
+public abstract class ExpandTreeAction extends Action {
+
+    public abstract TreeExpander getTreeExpander();
+
+    public ExpandTreeAction() {
+        super("Expand All");
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        final TreeExpander treeExpander = getTreeExpander();
+
+        checkNotNull(treeExpander);
+
+        if (!treeExpander.isExpandEnabled()) {
+            return;
+        }
+
+        treeExpander.expandTree();
+    }
+
+    @Override
+    public void update(ActionEvent e) {
+        final TreeExpander treeExpander = getTreeExpander();
+
+        e.getPresentation().setEnabledAndVisible(treeExpander.isExpandEnabled());
+    }
+}

ide/che-core-ide-app/src/main/java/org/eclipse/che/ide/part/explorer/project/ProjectExplorerPresenter.java

@@ -20,7 +20,9 @@
 import org.eclipse.che.commons.annotation.Nullable;
 import org.eclipse.che.ide.CoreLocalizationConstant;
 import org.eclipse.che.ide.Resources;
+import org.eclipse.che.ide.api.app.AppContext;
 import org.eclipse.che.ide.api.data.tree.Node;
+import org.eclipse.che.ide.api.data.tree.TreeExpander;
 import org.eclipse.che.ide.api.data.tree.settings.NodeSettings;
 import org.eclipse.che.ide.api.data.tree.settings.SettingsProvider;
 import org.eclipse.che.ide.api.mvp.View;
@@ -37,11 +39,13 @@
 import org.eclipse.che.ide.api.selection.Selection;
 import org.eclipse.che.ide.api.workspace.event.WorkspaceStoppedEvent;
 import org.eclipse.che.ide.part.explorer.project.ProjectExplorerView.ActionDelegate;
+import org.eclipse.che.ide.project.node.SyntheticNode;
 import org.eclipse.che.ide.project.node.SyntheticNodeUpdateEvent;
 import org.eclipse.che.ide.resource.Path;
 import org.eclipse.che.ide.resources.tree.ResourceNode;
 import org.eclipse.che.ide.ui.smartTree.NodeDescriptor;
 import org.eclipse.che.ide.ui.smartTree.Tree;
+import org.eclipse.che.ide.ui.smartTree.event.BeforeExpandNodeEvent;
 import org.eclipse.che.ide.ui.smartTree.event.SelectionChangedEvent;
 import org.eclipse.che.ide.ui.smartTree.event.SelectionChangedEvent.SelectionChangedHandler;
 import org.eclipse.che.providers.DynaObject;
@@ -74,6 +78,7 @@ public class ProjectExplorerPresenter extends BasePresenter implements ActionDel
     private final SettingsProvider         settingsProvider;
     private final CoreLocalizationConstant locale;
     private final Resources                resources;
+    private final TreeExpander             treeExpander;
 
     private static final int PART_SIZE = 500;
 
@@ -85,7 +90,8 @@ public ProjectExplorerPresenter(final ProjectExplorerView view,
                                     CoreLocalizationConstant locale,
                                     Resources resources,
                                     final ResourceNode.NodeFactory nodeFactory,
-                                    final SettingsProvider settingsProvider) {
+                                    final SettingsProvider settingsProvider,
+                                    final AppContext appContext) {
         this.view = view;
         this.nodeFactory = nodeFactory;
         this.settingsProvider = settingsProvider;
@@ -109,6 +115,50 @@ public void onSelectionChanged(SelectionChangedEvent event) {
                 setSelection(new Selection<>(event.getSelection()));
             }
         });
+
+        view.getTree().addBeforeExpandHandler(new BeforeExpandNodeEvent.BeforeExpandNodeHandler() {
+            @Override
+            public void onBeforeExpand(BeforeExpandNodeEvent event) {
+                final NodeDescriptor nodeDescriptor = view.getTree().getNodeDescriptor(event.getNode());
+
+                if (event.getNode() instanceof SyntheticNode && nodeDescriptor != null && nodeDescriptor.isExpandDeep()) {
+                    event.setCancelled(true);
+                }
+            }
+        });
+
+        treeExpander = new ProjectExplorerTreeExpander(view.getTree(), appContext);
+
+        registerNative();
+    }
+
+    /* Expose Project Explorer's internal API to the world, to allow automated Selenium scripts expand all projects tree. */
+    private native void registerNative() /*-{
+        var that = this;
+
+        var ProjectExplorer = {};
+
+        ProjectExplorer.expandAll = $entry(function() {
+            that.@org.eclipse.che.ide.part.explorer.project.ProjectExplorerPresenter::doExpand()();
+        })
+
+        ProjectExplorer.collapseAll = $entry(function() {
+            that.@org.eclipse.che.ide.part.explorer.project.ProjectExplorerPresenter::doCollapse()();
+        })
+
+        $wnd.IDE.ProjectExplorer = ProjectExplorer;
+    }-*/;
+
+    private void doExpand() {
+        if (treeExpander.isExpandEnabled()) {
+            treeExpander.expandTree();
+        }
+    }
+
+    private void doCollapse() {
+        if (treeExpander.isCollapseEnabled()) {
+            treeExpander.collapseTree();
+        }
     }
 
     @Override

ide/che-core-ide-app/src/main/java/org/eclipse/che/ide/part/explorer/project/ProjectExplorerTreeExpander.java

@@ -0,0 +1,80 @@
+package org.eclipse.che.ide.part.explorer.project;
+
+import com.google.common.base.Predicate;
+
+import org.eclipse.che.api.promises.client.Operation;
+import org.eclipse.che.api.promises.client.OperationException;
+import org.eclipse.che.ide.api.app.AppContext;
+import org.eclipse.che.ide.api.data.tree.Node;
+import org.eclipse.che.ide.api.data.tree.TreeExpander;
+import org.eclipse.che.ide.api.resources.Resource;
+import org.eclipse.che.ide.ui.smartTree.Tree;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.collect.Iterables.any;
+
+/**
+ * Project explorer tree expander. Takes care about resources loading state, in case if tree has been never expanded before, it requests
+ * infinite resource tree from the server and then expands project tree on the UI. On the second time it just expands project tree without
+ * additional resource requests.
+ *
+ * @author Vlad Zhukovskyi
+ * @since 5.0.0
+ * @see TreeExpander
+ */
+final class ProjectExplorerTreeExpander implements TreeExpander {
+
+    private Tree tree;
+    private AppContext appContext;
+
+    public ProjectExplorerTreeExpander(Tree tree, AppContext appContext) {
+        this.tree = tree;
+        this.appContext = appContext;
+    }
+
+    private final boolean[] everExpanded = new boolean[]{false};
+
+    @Override
+    public void expandTree() {
+        if (everExpanded[0]) {
+            tree.expandAll();
+
+            return;
+        }
+
+        appContext.getWorkspaceRoot().getTree(-1).then(new Operation<Resource[]>() {
+            @Override
+            public void apply(Resource[] ignored) throws OperationException {
+                everExpanded[0] = true;
+
+                tree.expandAll();
+            }
+        });
+    }
+
+    @Override
+    public boolean isExpandEnabled() {
+        return tree.getNodeStorage().getAllItemsCount() != 0;
+    }
+
+    @Override
+    public void collapseTree() {
+        tree.collapseAll();
+    }
+
+    @Override
+    public boolean isCollapseEnabled() {
+        return any(tree.getRootNodes(), isExpanded());
+    }
+
+    private Predicate<Node> isExpanded() {
+        return new Predicate<Node>() {
+            @Override
+            public boolean apply(@javax.annotation.Nullable Node node) {
+                checkNotNull(node);
+
+                return tree.isExpanded(node);
+            }
+        };
+    }
+}

ide/che-core-ide-app/src/main/java/org/eclipse/che/ide/resources/impl/ResourceManager.java

@@ -631,10 +631,10 @@ Promise<Resource[]> getRemoteResources(final Container container, final int dept
             return promises.resolve(NO_RESOURCES);
         }
 
+        int depthToReload = depth;
         final Optional<Resource[]> descendants = store.getAll(container.getLocation());
 
-        int depthToReload = depth;
-        if (descendants.isPresent()) {
+        if (depthToReload != -1 && descendants.isPresent()) {
             for (Resource resource : descendants.get()) {
                 if (resource.getLocation().segmentCount() - container.getLocation().segmentCount() > depth) {
                     depthToReload = resource.getLocation().segmentCount() - container.getLocation().segmentCount();