diff: oneside viewer - hide chevrone operations on state invalidation

* they will do nothing anyway

platform/diff-impl/src/com/intellij/diff/tools/fragmented/OnesideDiffChange.java

@@ -235,6 +235,7 @@ public class OnesideDiffChange {
 
     @Nullable
     public GutterIconRenderer createRenderer() {
+      if (myViewer.isStateIsOutOfDate()) return null;
       if (!myViewer.isEditable(mySide.other(), true)) return null;
       boolean bothEditable = myViewer.isEditable(mySide, true);
 

platform/diff-impl/src/com/intellij/diff/tools/fragmented/OnesideDiffViewer.java

@@ -383,6 +383,22 @@ public class OnesideDiffViewer extends TextDiffViewerBase {
     updateEditorCanBeTyped();
   }
 
+  @CalledInAwt
+  protected void markSuppressEditorTyping() {
+    mySuppressEditorTyping = true;
+    updateEditorCanBeTyped();
+  }
+
+  @CalledInAwt
+  protected void markStateIsOutOfDate() {
+    myStateIsOutOfDate = true;
+    if (myChangedBlockData != null) {
+      for (OnesideDiffChange diffChange : myChangedBlockData.getDiffChanges()) {
+        diffChange.updateGutterActions();
+      }
+    }
+  }
+
   @Nullable
   private EditorHighlighter buildHighlighter(@Nullable Project project,
                                              @NotNull DocumentContent content1,
@@ -611,8 +627,7 @@ public class OnesideDiffViewer extends TextDiffViewerBase {
         if (twosideStartLine == -1 || twosideEndLine == -1) {
           // this should never happen
           logDebugInfo(e, onesideStartPosition, onesideEndPosition, twosideStartLine, twosideEndLine);
-          mySuppressEditorTyping = true;
-          updateEditorCanBeTyped();
+          markSuppressEditorTyping();
           return;
         }
 
@@ -630,7 +645,7 @@ public class OnesideDiffViewer extends TextDiffViewerBase {
       finally {
         // TODO: we can avoid marking state out-of-date in some simple cases (like in SimpleDiffViewer)
         // but this will greatly increase complexity, so let's wait if it's actually required by users
-        myStateIsOutOfDate = true;
+        markStateIsOutOfDate();
 
         myFoldingModel.onDocumentChanged(e);
         scheduleRediff();
@@ -673,9 +688,8 @@ public class OnesideDiffViewer extends TextDiffViewerBase {
   protected void onDocumentChange(@NotNull DocumentEvent e) {
     if (myDuringTwosideDocumentModification) return;
 
-    myStateIsOutOfDate = true;
-    mySuppressEditorTyping = true;
-    updateEditorCanBeTyped();
+    markStateIsOutOfDate();
+    markSuppressEditorTyping();
 
     myFoldingModel.onDocumentChanged(e);
     scheduleRediff();