utilities feature

Gallery.Share/Resources/Theme/DarkTheme.cs

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+using Gallery.Services;
+using Xamarin.Forms;
+
+namespace Gallery.Resources.Theme
+{
+    public class DarkTheme : Theme
+    {
+        private static DarkTheme instance;
+        public static DarkTheme Instance
+        {
+            get
+            {
+                if (instance == null)
+                {
+                    instance = new DarkTheme();
+                }
+                return instance;
+            }
+        }
+
+        public DarkTheme()
+        {
+            InitColors();
+            InitResources();
+        }
+
+        private void InitColors()
+        {
+            Add(StatusBarStyle, StatusBarStyles.WhiteText);
+            Add(NavigationColor, Color.FromRgb(0x11, 0x11, 0x11));
+
+            Add(Primary, Color.FromRgb(33, 150, 243));
+        }
+    }
+}

Gallery.Share/Resources/Theme/LightTheme.cs

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+using Gallery.Services;
+using Xamarin.Forms;
+
+namespace Gallery.Resources.Theme
+{
+    public class LightTheme : Theme
+    {
+        private static LightTheme instance;
+        public static LightTheme Instance
+        {
+            get
+            {
+                if (instance == null)
+                {
+                    instance = new LightTheme();
+                }
+                return instance;
+            }
+        }
+
+        public LightTheme()
+        {
+            InitColors();
+            InitResources();
+        }
+
+        private void InitColors()
+        {
+            Add(StatusBarStyle, StatusBarStyles.DarkText);
+            Add(NavigationColor, Color.FromRgb(0xf0, 0xf0, 0xf0));
+
+            Add(Primary, Color.FromRgb(33, 150, 243));
+        }
+    }
+}

Gallery.Share/Resources/Theme/Theme.cs

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+using Gallery.Resources.UI;
+using Xamarin.Forms;
+
+namespace Gallery.Resources.Theme
+{
+    public abstract class Theme : ResourceDictionary
+    {
+        public const string StatusBarStyle = nameof(StatusBarStyle);
+        public const string NavigationColor = nameof(NavigationColor);
+
+        public const string IconLightFamily = nameof(IconLightFamily);
+        public const string IconRegularFamily = nameof(IconRegularFamily);
+        public const string IconSolidFamily = nameof(IconSolidFamily);
+        public const string ScreenBottomPadding = nameof(ScreenBottomPadding);
+
+        public const string IconClose = nameof(IconClose);
+        public const string FontIconRefresh = nameof(FontIconRefresh);
+
+        public const string Primary = nameof(Primary);
+
+        protected void InitResources()
+        {
+            Add(IconLightFamily, Definition.IconLightFamily);
+            Add(IconRegularFamily, Definition.IconRegularFamily);
+            Add(IconSolidFamily, Definition.IconSolidFamily);
+            Add(ScreenBottomPadding, Definition.ScreenBottomPadding);
+
+            Add(FontIconRefresh, GetFontIcon(Definition.IconRefresh, Definition.IconSolidFamily));
+
+            Add(IconClose, Definition.IconClose);
+        }
+
+        private FontImageSource GetFontIcon(string icon, string family, Color color = default)
+        {
+            return new FontImageSource
+            {
+                FontFamily = family,
+                Glyph = icon,
+                Size = Definition.FontSizeTitle,
+                Color = color
+            };
+        }
+    }
+}