Find tool window: split 'show preview' setting to two for find/replace

platform/lang-impl/src/com/intellij/find/impl/FindInProjectUtil.java

@@ -378,6 +378,7 @@ public class FindInProjectUtil {
       presentation.setSearchPattern(null);
       presentation.setReplacePattern(null);
     }
+    presentation.setReplaceMode(findModel.isReplaceState());
   }
 
   @NotNull

platform/usageView/src/com/intellij/usages/UsageViewPresentation.java

@@ -50,6 +50,7 @@ public class UsageViewPresentation {
   private boolean myExcludeAvailable = true;
   private Pattern mySearchPattern;
   private Pattern myReplacePattern;
+  private boolean myReplaceMode;
 
   public String getTabText() {
     return myTabText;
@@ -234,6 +235,14 @@ public class UsageViewPresentation {
     return myReplacePattern;
   }
 
+  public boolean isReplaceMode() {
+    return myReplaceMode;
+  }
+
+  public void setReplaceMode(boolean replaceMode) {
+    myReplaceMode = replaceMode;
+  }
+
   @Override
   public boolean equals(Object o) {
     if (this == o) return true;

platform/usageView/src/com/intellij/usages/UsageViewSettings.kt

@@ -72,7 +72,10 @@ open class UsageViewSettings(
   var isShowModules by property(false)
 
   @get:OptionTag("IS_PREVIEW_USAGES")
-  var isPreviewUsages by property(true)
+  var isPreviewUsages by property(false)
+
+  @get:OptionTag("IS_REPLACE_PREVIEW_USAGES")
+  var isReplacePreviewUsages by property(true)
 
   @get:OptionTag("IS_SORT_MEMBERS_ALPHABETICALLY")
   var isSortAlphabetically by property(false)

platform/usageView/src/com/intellij/usages/impl/PreviewUsageAction.java

@@ -19,11 +19,11 @@ class PreviewUsageAction extends RuleAction {
 
   @Override
   protected boolean getOptionValue() {
-    return myView.getUsageViewSettings().isPreviewUsages();
+    return myView.isPreviewUsages();
   }
 
   @Override
-  protected void setOptionValue(final boolean value) {
-    myView.getUsageViewSettings().setPreviewUsages(value);
+  protected void setOptionValue(boolean value) {
+    myView.setPreviewUsages(value);
   }
 }

platform/usageView/src/com/intellij/usages/impl/UsageViewImpl.java

@@ -520,7 +520,7 @@ public class UsageViewImpl implements UsageView {
 
     myCentralPanel.add(myPreviewSplitter, BorderLayout.CENTER);
 
-    if (getUsageViewSettings().isPreviewUsages()) {
+    if (isPreviewUsages()) {
       myPreviewSplitter.setProportion(getUsageViewSettings().getPreviewUsagesSplitterProportion());
       treePane.putClientProperty(UIUtil.KEEP_BORDER_SIDES, SideBorder.RIGHT);
       final JBTabbedPane tabbedPane = new JBTabbedPane(SwingConstants.BOTTOM){
@@ -585,6 +585,18 @@ public class UsageViewImpl implements UsageView {
     }
   }
 
+  public boolean isPreviewUsages() {
+    return myPresentation.isReplaceMode() ? getUsageViewSettings().isReplacePreviewUsages() : getUsageViewSettings().isPreviewUsages();
+  }
+
+  public void setPreviewUsages(boolean state) {
+    if (myPresentation.isReplaceMode()) {
+      getUsageViewSettings().setReplacePreviewUsages(state);
+    } else {
+      getUsageViewSettings().setPreviewUsages(state);
+    }
+  }
+
   @NotNull
   private static UsageFilteringRule[] getActiveFilteringRules(final Project project) {
     final UsageFilteringRuleProvider[] providers = Extensions.getExtensions(UsageFilteringRuleProvider.EP_NAME);