From 568003a86babf63f8134140c4ca2c925bb4f601c Mon Sep 17 00:00:00 2001
From: "Denis.Zhdanov" <Denis.Zhdanov@jetbrains.com>
Date: Mon, 22 Aug 2011 17:53:57 +0400
Subject: [PATCH] IDEA-72690 Auto Collapse File Header Code Folding seems
 broken

Corrected 'expanded' folding state processing for the regions that start at the zero offset
---
 .../folding/impl/UpdateFoldRegionsOperation.java     | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/UpdateFoldRegionsOperation.java b/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/UpdateFoldRegionsOperation.java
index 81c49caebc83..f0c7f7f27d59 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/UpdateFoldRegionsOperation.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/UpdateFoldRegionsOperation.java
@@ -153,8 +153,16 @@ class UpdateFoldRegionsOperation implements Runnable {
       if (caretOffset > myEditor.getDocument().getTextLength()) {
         return false;
       }
-      final int currentLine = document.getLineNumber(caretOffset);
-      caretInside = firstLine <= currentLine && currentLine <= lastLine;
+      if (caretOffset == 0 && myApplyDefaultState) {
+        // Caret is located at the zero position when the editor is just opened, so, any fold region that starts at the zero
+        // offset (e.g. file header provided by 'copyright' plugin) is always expanded. We want to avoid that, hence, corresponding
+        // control flow branch is introduced.
+        caretInside = false;
+      }
+      else {
+        final int currentLine = document.getLineNumber(caretOffset);
+        caretInside = firstLine <= currentLine && currentLine <= lastLine;
+      }
     }
 
     if (myApplyDefaultState) {