From 8cd48004dd68d5ea3e4d4f0fada256aa1b83186d Mon Sep 17 00:00:00 2001
From: Willem Van Lint <willem@vanlint.info>
Date: Sat, 9 Apr 2016 18:42:18 -0700
Subject: [PATCH] Fixed positioning for overlay

---
 src/text-editor-presenter.coffee | 12 +++++++-----
 static/text-editor-light.less    |  2 +-
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/text-editor-presenter.coffee b/src/text-editor-presenter.coffee
index ef1b403c3..e5a9cd589 100644
--- a/src/text-editor-presenter.coffee
+++ b/src/text-editor-presenter.coffee
@@ -459,19 +459,21 @@ class TextEditorPresenter
 
       pixelPosition = @pixelPositionForScreenPosition(screenPosition)
 
-      top = pixelPosition.top + @lineHeight
-      left = pixelPosition.left + @gutterWidth
+      # Fixed positioning.
+      top = @boundingClientRect.top + pixelPosition.top + @lineHeight
+      left = @boundingClientRect.left + pixelPosition.left + @gutterWidth
 
       if overlayDimensions = @overlayDimensions[decoration.id]
         {itemWidth, itemHeight, contentMargin} = overlayDimensions
 
-        rightDiff = left + @boundingClientRect.left + itemWidth + contentMargin - @windowWidth
+        rightDiff = left + itemWidth + contentMargin - @windowWidth
         left -= rightDiff if rightDiff > 0
 
-        leftDiff = left + @boundingClientRect.left + contentMargin
+        leftDiff = left + contentMargin
         left -= leftDiff if leftDiff < 0
 
-        if top + @boundingClientRect.top + itemHeight > @windowHeight and top - (itemHeight + @lineHeight) >= 0
+        if top + itemHeight > @windowHeight and
+           top - (itemHeight + @lineHeight) >= 0
           top -= itemHeight + @lineHeight
 
       pixelPosition.top = top
diff --git a/static/text-editor-light.less b/static/text-editor-light.less
index 7fafade1e..f5429fd7f 100644
--- a/static/text-editor-light.less
+++ b/static/text-editor-light.less
@@ -15,7 +15,7 @@ atom-text-editor[mini] {
 }
 
 atom-overlay {
-  position: absolute;
+  position: fixed;
   display: block;
   z-index: 4;
 }