Port ContentAlignmentEditor

Closes #2018

.gitattributes

@@ -1 +1,4 @@
 * text=auto
+
+# Collapse XLF files in PRs by default
+*.xlf linguist-generated=true

src/System.Windows.Forms.Design.Editors/src/Misc/DpiHelper.cs

@@ -126,6 +126,15 @@ public static bool IsScalingRequired
             }
         }
 
+        /// <summary>
+        /// scale logical pixel to the factor
+        /// </summary>
+        public static int ConvertToGivenDpiPixel(int value, double pixelFactor)
+        {
+            var scaledValue = (int)Math.Round(value * pixelFactor);
+            return scaledValue == 0 ? 1 : scaledValue;
+        }
+
         /// <summary>
         ///  Transforms a horizontal or vertical integer coordinate from logical to device units
         ///  by scaling it up  for current DPI and rounding to nearest integer value
@@ -142,6 +151,20 @@ public static int LogicalToDeviceUnits(int value, int devicePixels = 0)
             return (int)Math.Round(scalingFactor * (double)value);
         }
 
+        /// <summary>
+        /// Transforms a horizontal or vertical integer coordinate from logical to device units
+        /// by scaling it up  for current DPI and rounding to nearest integer value
+        /// </summary>
+        public static double LogicalToDeviceUnits(double value, int devicePixels = 0)
+        {
+            if (devicePixels == 0)
+            {
+                return LogicalToDeviceUnitsScalingFactor * value;
+            }
+            double scalingFactor = devicePixels / LogicalDpi;
+            return scalingFactor * value;
+        }
+
         /// <summary>
         ///  Transforms a horizontal integer coordinate from logical to device units
         ///  by scaling it up  for current DPI and rounding to nearest integer value

src/System.Windows.Forms.Design.Editors/src/Resources/SR.resx

@@ -218,6 +218,36 @@ Press Ctrl+Enter to accept Text.</value>
   <data name="ImageCollectionEditorFormText" xml:space="preserve">
     <value>Images Collection Editor</value>
   </data>
+  <data name="ContentAlignmentEditorAccName" xml:space="preserve">
+    <value>Alignment Picker</value>
+  </data>
+  <data name="ContentAlignmentEditorBottomCenterAccName" xml:space="preserve">
+    <value>Bottom Middle</value>
+  </data>
+  <data name="ContentAlignmentEditorBottomLeftAccName" xml:space="preserve">
+    <value>Bottom Left</value>
+  </data>
+  <data name="ContentAlignmentEditorBottomRightAccName" xml:space="preserve">
+    <value>Bottom Right</value>
+  </data>
+  <data name="ContentAlignmentEditorMiddleCenterAccName" xml:space="preserve">
+    <value>Middle Center</value>
+  </data>
+  <data name="ContentAlignmentEditorMiddleLeftAccName" xml:space="preserve">
+    <value>Middle Left</value>
+  </data>
+  <data name="ContentAlignmentEditorMiddleRightAccName" xml:space="preserve">
+    <value>Middle Right</value>
+  </data>
+  <data name="ContentAlignmentEditorTopCenterAccName" xml:space="preserve">
+    <value>Top Center</value>
+  </data>
+  <data name="ContentAlignmentEditorTopLeftAccName" xml:space="preserve">
+    <value>Top Left</value>
+  </data>
+  <data name="ContentAlignmentEditorTopRightAccName" xml:space="preserve">
+    <value>Top Right</value>
+  </data>
   <data name="iconFileDescription" xml:space="preserve">
     <value>Icon files</value>
   </data>