[gnome-shell/31-fix-hdpi-folder-icons: 14/14] appDisplay: Fix small app folder icons when using HIDPI

[Florian Müllner <fmuellner src gnome org>]

commit 92f1aec3dd1a373645aa0f70016440993a8ac997
Author: Nikita Churaev <lamefun x0r gmail com>
Date:   Sat Jan 6 02:54:33 2018 +0300

    appDisplay: Fix small app folder icons when using HIDPI
    
    While the scale factor is taken into account for app icons, we set
    an explicit size when combining the into a folder icon - unless we
    take the factor into account, the result will be too small on HiDPI
    displays.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=792259

 js/ui/appDisplay.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index c309471a0..3b50928b9 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -1192,11 +1192,12 @@ var FolderView = new Lang.Class({
                                    style_class: 'app-folder-icon' });
         layout.hookup_style(icon);
         let subSize = Math.floor(FOLDER_SUBICON_FRACTION * size);
+        let scale = St.ThemeContext.get_for_stage(global.stage).scale_factor;
 
         let numItems = this._allItems.length;
         let rtl = icon.get_text_direction() == Clutter.TextDirection.RTL;
         for (let i = 0; i < 4; i++) {
-            let bin = new St.Bin({ width: subSize, height: subSize });
+            let bin = new St.Bin({ width: subSize * scale, height: subSize * scale });
             if (i < numItems)
                 bin.child = this._allItems[i].app.create_icon_texture(subSize);
             layout.attach(bin, rtl ? (i + 1) % 2 : i % 2, Math.floor(i / 2), 1, 1);