vcs: Allow diff preview splitter in "Local Changes" to hide all inner...

vcs: Allow diff preview splitter in "Local Changes" to hide all inner components except toolwindow toolbar

platform/vcs-impl/src/com/intellij/openapi/vcs/changes/ChangesViewManager.java

@@ -180,7 +180,13 @@ public class ChangesViewManager implements ChangesViewI, ProjectComponent, Persi
     addBorder(changesToolbar.getComponent(), createBorder(JBColor.border(), SideBorder.RIGHT));
     BorderLayoutPanel changesPanel = simplePanel(createScrollPane(myView)).addToLeft(changesToolbar.getComponent());
 
-    BorderLayoutPanel contentPanel = simplePanel(changesPanel);
+    BorderLayoutPanel contentPanel = new BorderLayoutPanel() {
+      @Override
+      public Dimension getMinimumSize() {
+        return isMinimumSizeSet() ? super.getMinimumSize() : changesToolbar.getComponent().getPreferredSize();
+      }
+    };
+    contentPanel.addToCenter(changesPanel);
     if (isNonModalCommit()) {
       contentPanel.addToBottom(new ChangesViewCommitPanel(myProject));
     }

platform/vcs-impl/src/com/intellij/openapi/vcs/changes/PreviewDiffSplitterComponent.java

-/*
- * Copyright 2000-2017 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.openapi.vcs.changes;
 
 import com.intellij.ui.IdeBorderFactory;
@@ -22,6 +8,8 @@ import org.jetbrains.annotations.NotNull;
 
 import javax.swing.*;
 
+import static com.intellij.util.ui.JBUI.emptySize;
+
 public class PreviewDiffSplitterComponent extends JBSplitter {
   @NotNull private final JComponent myFirstComponent;
   @NotNull private final DiffPreviewUpdateProcessor myProcessor;
@@ -33,7 +21,6 @@ public class PreviewDiffSplitterComponent extends JBSplitter {
     super(splitterDimensionKey, 0.5f);
     myFirstComponent = firstComponent;
     myProcessor = processor;
-    setHonorComponentsMinimumSize(false);
     setFirstComponent(firstComponent);
     setDetailsOn(detailsOn);
   }
@@ -50,6 +37,10 @@ public class PreviewDiffSplitterComponent extends JBSplitter {
   private void updateVisibility() {
     setSecondComponent(myDetailsOn ? myProcessor.getComponent() : null);
     myFirstComponent.setBorder(myDetailsOn ? IdeBorderFactory.createBorder(SideBorder.RIGHT) : null);
+    JComponent secondComponent = getSecondComponent();
+    if (secondComponent != null) {
+      secondComponent.setMinimumSize(emptySize());
+    }
     revalidate();
     repaint();
   }