From ac65e1c8153703b3f1df98d69dc5ef4cc9ea7c4a Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Fri, 3 Aug 2012 14:40:15 +0200
Subject: [PATCH] no syntax highlighting for large files (IDEA-89672)

---
 .../editor/highlighter/EditorHighlighterFactoryImpl.java   | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/platform/platform-impl/src/com/intellij/openapi/editor/highlighter/EditorHighlighterFactoryImpl.java b/platform/platform-impl/src/com/intellij/openapi/editor/highlighter/EditorHighlighterFactoryImpl.java
index 4c32efd347a6..e1b8949c9f14 100644
--- a/platform/platform-impl/src/com/intellij/openapi/editor/highlighter/EditorHighlighterFactoryImpl.java
+++ b/platform/platform-impl/src/com/intellij/openapi/editor/highlighter/EditorHighlighterFactoryImpl.java
@@ -17,14 +17,17 @@ package com.intellij.openapi.editor.highlighter;
 
 import com.intellij.lang.Language;
 import com.intellij.openapi.diagnostic.Logger;
+import com.intellij.openapi.editor.HighlighterColors;
 import com.intellij.openapi.editor.colors.EditorColorsManager;
 import com.intellij.openapi.editor.colors.EditorColorsScheme;
+import com.intellij.openapi.editor.ex.util.EmptyEditorHighlighter;
 import com.intellij.openapi.editor.ex.util.LexerEditorHighlighter;
 import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.fileTypes.*;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.LanguageSubstitutors;
+import com.intellij.psi.SingleRootFileViewProvider;
 import com.intellij.testFramework.LightVirtualFile;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -58,6 +61,10 @@ public class EditorHighlighterFactoryImpl extends EditorHighlighterFactory {
 
   @Override
   public EditorHighlighter createEditorHighlighter(@NotNull final VirtualFile vFile, @NotNull final EditorColorsScheme settings, final Project project) {
+    if (SingleRootFileViewProvider.isTooLarge(vFile)) {
+      return new EmptyEditorHighlighter(settings.getAttributes(HighlighterColors.TEXT));
+    }
+
     final FileType fileType = vFile.getFileType();
     if (fileType instanceof LanguageFileType) {
       LanguageFileType substFileType = substituteFileType(((LanguageFileType)fileType).getLanguage(), vFile, project);