Merge pull request #397 from NativeScript/niliev/fonts

add icon fonts section for Image and stretch property

app/ng-ui-category/icon-fonts/basics/article.md

@@ -3,3 +3,10 @@ The example demonstrates, how to use setup the  `font-family` property via CSS a
 
 <snippet id='icon-font-html-def'/>
 <snippet id='icon-font-css-class-def'/>
+
+With NativeScript 6 and above, we can use icon fonts with `Image` elements. For that purpose the `font://` prefix is needed to set the icon font code.
+
+<snippet id='icon-font-html-images'/>
+<snippet id='icon-font-css-class-def'/>
+
+>> **Note:** Images have specific stretch options (`none`, `aspectFit`, `aspectFill`). At the same time the icon fonts are having `font-size` which can control the size of our font. If you want to set the size of your icon through the `font-size` property then set `stretch` property to `none`. Any other values of the stretch property (including the default one) will cause the icon to be streched by measuring the image (or if there is no sizes set, the parent layout in whcih the image is nested).

app/ng-ui-category/icon-fonts/basics/basic.component.html

@@ -19,4 +19,15 @@
     <!-- Using IcoMoon-Free.ttf -->
     <Label text="&#xe904;" class="ico"></Label>
     <!-- << icon-font-html-def -->
+
+    <!-- >> icon-font-html-images -->
+    <!-- 
+        In case, when the stretch property is set to aspectFit or aspectFill
+        the font-sizde will be disreagarderd and the image will take the vailable space
+        assigned through width/height or through its parent size
+
+        Setting the stretch property to none will allow using the font-size property
+    -->
+    <Image src="font://&#xf51e;" stretch="none" class="fas"></Image>
+    <!-- << icon-font-html-images -->
 </StackLayout>