[beast: 55/70] EBEAST: pick BrowserWindow defaults from a BrowserWindowDefaults CSS rule

[Tim Janik <timj src gnome org>]

commit f47481e91565d134aa2cf2f9bc19eb7940799e09
Author: Tim Janik <timj gnu org>
Date:   Tue Mar 7 17:53:37 2017 +0100

    EBEAST: pick BrowserWindow defaults from a BrowserWindowDefaults CSS rule
    
    Signed-off-by: Tim Janik <timj gnu org>

 ebeast/main.js |   26 ++++++++++++++++++++------
 1 files changed, 20 insertions(+), 6 deletions(-)
---
diff --git a/ebeast/main.js b/ebeast/main.js
index 83a064a..a676544 100644
--- a/ebeast/main.js
+++ b/ebeast/main.js
@@ -5,17 +5,32 @@ const Electron = require ('electron');
 var win;
 function create_window ()
 {
+  const FS = require ('fs');
   // avoid menu flicker, leave menu construction to the window
   Electron.Menu.setApplicationMenu (null);
+  // find some CSS presets needed as BrowserWindow defaults
+  let appcss = FS.readFileSync ('objects/app.css', 'UTF-8');
+  let rex = /\bBrowserWindowDefaults\s*{([^}]*)}/m;
+  appcss = rex.exec (appcss)[1];       // extract BrowserWindowDefaults section
+  rex = /\/\*([^*]|\*[^\/])*\*\//;
+  appcss = appcss.replace (rex, ' ');  // remove comments
+  rex = /\bbackgroundColor\s*:\s*([^;}]*)\s*[;}]/mi;
+  const backgroundColor = rex.exec (appcss)[1];
+  rex = /\bdefaultFontSize\s*:\s*([^;}]*)\s*[;}]/mi;
+  const defaultFontSize = rex.exec (appcss)[1];
+  rex = /\bdefaultMonospaceFontSize\s*:\s*([^;}]*)\s*[;}]/mi;
+  const defaultMonospaceFontSize = rex.exec (appcss)[1];
   // window configuraiton
   const options = {
-    width: 1820, height: 1024, // calling win.maximize() flickers, using a big size not
+    width:                             1820, // calling win.maximize() causes flicker
+    height:                            1365, // using a big initial size avoids flickering
+    backgroundColor:                   backgroundColor,
     webPreferences: {
-      defaultEncoding: 'UTF-8',
-      defaultFontSize:         15,
-      defaultMonospaceFontSize:        14,
+      defaultEncoding:                 'UTF-8',
+      defaultFontSize:                 parseInt (defaultFontSize),
+      defaultMonospaceFontSize:                parseInt (defaultMonospaceFontSize),
       defaultFontFamily: {
-       standard:       'Candara',      // 'Times New Roman',
+       standard:       'sans',         // 'Times New Roman',
        serif:          'Constantia',   // 'Times New Roman',
        sansSerif:      'Candara',      // 'Arial',
        monospace:      'Consolas',     // 'Courier New',
@@ -25,7 +40,6 @@ function create_window ()
     },
     show: false, // avoid incremental load effect, see 'ready-to-show'
     darkTheme: true,
-    backgroundColor: '#333333',
   };
   win = new Electron.BrowserWindow (options);
   win.once ('ready-to-show', () => { win.show(); });