Core - Add CompositionUnderline.Style (IME)

https://source.chromium.org/chromium/chromium/src/+/master:ui/base/ime/win/imm32_manager.cc;l=82;drc=c70af83bc44f6829277cdc3621e7015d6e0d7530;bpv=1;bpt=1?q=GCS_COMPCLAUSE&ss=chromium%2Fchromium%2Fsrc

Resolves #3107

Author: amaitland

CefSharp.Core/Internals/CefBrowserHostWrapper.cpp

@@ -499,6 +499,7 @@ void CefBrowserHostWrapper::ImeSetComposition(String^ text, cli::array<Compositi
             c.color = underline.Color;
             c.background_color = underline.BackgroundColor;
             c.thick = (int)underline.Thick;
+            c.style = (cef_composition_underline_style_t)underline.Style;
             underlinesVector.push_back(c);
         }
     }

CefSharp/CefSharp.csproj

@@ -104,6 +104,7 @@
     <Compile Include="CdmRegistration.cs" />
     <Compile Include="DefaultApp.cs" />
     <Compile Include="DevToolsExtensions.cs" />
+    <Compile Include="Enums\CompositionUnderlineStyle.cs" />
     <Compile Include="Enums\SchemeOptions.cs" />
     <Compile Include="Internals\CefThread.cs" />
     <Compile Include="Internals\IBrowserRefCounter.cs" />

CefSharp/Enums/CompositionUnderlineStyle.cs

@@ -0,0 +1,29 @@
+// Copyright © 2020 The CefSharp Authors. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
+
+namespace CefSharp.Enums
+{
+    /// <summary>
+    /// Composition underline style.
+    /// </summary>
+    public enum CompositionUnderlineStyle
+    {
+        /// <summary>
+        /// Solid
+        /// </summary>
+        Solid,
+        /// <summary>
+        /// Dot
+        /// </summary>
+        Dot,
+        /// <summary>
+        /// Dash
+        /// </summary>
+        Dash,
+        /// <summary>
+        /// None
+        /// </summary>
+        None
+    }
+}

CefSharp/Structs/CompositionUnderline.cs

@@ -2,6 +2,8 @@
 //
 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
 
+using CefSharp.Enums;
+
 namespace CefSharp.Structs
 {
     /// <summary>
@@ -30,6 +32,11 @@ public struct CompositionUnderline
         /// </summary>
         public bool Thick { get; private set; }
 
+        /// <summary>
+        /// Style
+        /// </summary>
+        public CompositionUnderlineStyle Style { get; private set; }
+
         /// <summary>
         /// Constructor.
         /// </summary>
@@ -47,6 +54,26 @@ public CompositionUnderline(Range range, uint color, uint backGroundColor, bool
             BackgroundColor = backGroundColor;
             Thick = thick;
         }
+
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        /// <param name="range">Underline character range.</param>
+        /// <param name="color">Text color. 32-bit ARGB color value, not premultiplied. The color components are always in a known order.
+        /// Equivalent to the SkColor type.</param>
+        /// <param name="backGroundColor">Background color. 32-bit ARGB color value, not premultiplied. The color components are always in
+        /// a known order. Equivalent to the SkColor type.</param>
+        /// <param name="thick">True for thickunderline.</param>
+        /// <param name="style">Style</param>
+        public CompositionUnderline(Range range, uint color, uint backGroundColor, bool thick, CompositionUnderlineStyle style)
+            : this()
+        {
+            Range = range;
+            Color = color;
+            BackgroundColor = backGroundColor;
+            Thick = thick;
+            Style = style;
+        }
     }
 }