Views:: Make Labels support text selection.

ui/native_theme/native_theme_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/native_theme/native_theme_win.h"
 
 #include <windows.h>
 #include <stddef.h>
 #include <uxtheme.h>
 #include <vsstyle.h>
@@ skipping 499 matching lines @@
   // MenuItem:
   const SkColor kMenuSchemeHighlightBackgroundColorInvert =
       SkColorSetRGB(0x30, 0x30, 0x30);
   // Table:
   const SkColor kPositiveTextColor = SkColorSetRGB(0x0b, 0x80, 0x43);
   const SkColor kNegativeTextColor = SkColorSetRGB(0xc5, 0x39, 0x29);
   // Results Tables:
   const SkColor kResultsTableUrlColor =
       md ? gfx::kGoogleBlue700 : SkColorSetRGB(0x0b, 0x80, 0x43);
   const SkColor kResultsTableSelectedUrlColor = SK_ColorWHITE;
+  // Label:
+  const SkColor kLabelTextSelectionBackgroundFocusedColor = gfx::kGoogleBlue700;
 
   switch (color_id) {
     // Windows
     case kColorId_WindowBackground:
       return system_colors_[COLOR_WINDOW];
 
     // Dialogs
     case kColorId_DialogBackground:
     case kColorId_BubbleBackground:
       if (ui::MaterialDesignController::IsSecondaryUiMaterial())
@@ skipping 12 matching lines @@
     case kColorId_ButtonEnabledColor:
       return system_colors_[COLOR_BTNTEXT];
     case kColorId_ButtonHoverColor:
       return kButtonHoverColor;
 
     // Label
     case kColorId_LabelEnabledColor:
       return system_colors_[COLOR_BTNTEXT];
     case kColorId_LabelDisabledColor:
       return system_colors_[COLOR_GRAYTEXT];
+    case kColorId_LabelTextSelectionColor:
+      return system_colors_[COLOR_HIGHLIGHTTEXT];
+    case kColorId_LabelTextSelectionBackgroundFocused:
+      return kLabelTextSelectionBackgroundFocusedColor;

[karandeepb, 2016/11/07 04:06:36]

Tested the patch on Windows as well. 

Had to change this. Auto color readability in Labels (which is enabled by
default) was changing the text selection color from white to black on Windows.
See Label::RecalculateColors. This background color causes white text selection
color on Windows, which is what we want.

 
     // Textfield
     case kColorId_TextfieldDefaultColor:
       return system_colors_[COLOR_WINDOWTEXT];
     case kColorId_TextfieldDefaultBackground:
       return system_colors_[COLOR_WINDOW];
     case kColorId_TextfieldReadOnlyColor:
       return system_colors_[COLOR_GRAYTEXT];
     case kColorId_TextfieldReadOnlyBackground:
       return system_colors_[COLOR_3DFACE];
@@ skipping 1550 matching lines @@
     break;
   case LAST:
     NOTREACHED();
     break;
   }
   theme_handles_[theme_name] = handle;
   return handle;
 }
 
 }  // namespace ui