terminal/src/cascadia/TerminalSettingsModel/ColorScheme.idl
Dustin L. Howett 295fa38295
Introduce MS.Term.Core.Color to replace W.U.Color for Core/Control/TSM (#9658)
This pull request introduces Microsoft.Terminal.Core.Color as an
alternative to both Windows.UI.Color and uint32_t/COLORREF in the
TerminalCore, ...Control, ...SettingsModel and ...SettingsEditor layers.

M.T.C.Color is trivially convertible to/from til::color and therefore
to/from COLORREF, W.U.Color, and any other color representation we might
need².

I've replaced almost every use of W.U.Color and uint32_t-as-color in the
above layers, with minor exception¹.

The need for this work is twofold.

First: We cannot bear a dependency from TerminalCore (which should,
on paper, be Windows 7 compatible) on Windows.UI or any other WinRT
namespace.

This work removes one big dependency on Windows.UI, but it does not go
all the way.

Second: TerminalCore chose to communicate mostly in packed uint32s
(COLORREF), which was inherently lossy and dangerous.

¹ The UI layers (TerminalControl, TerminalApp) still use
Windows.UI.Color as they are intimately connected to the UWP XAML UI.

² In the future, we might even be able to *use* the alpha channel...

## PR Checklist
* [x] I ran into the need for this when I introduced cursor inversion
* [X] Fixes a longstanding itch

## Validation Steps Performed
Built and ran all tests for the impacted layers, even the local ones!
2021-03-30 20:15:49 +00:00

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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
namespace Microsoft.Terminal.Settings.Model
{
[default_interface] runtimeclass ColorScheme : Windows.Foundation.IStringable {
ColorScheme(String name);
String Name;
Microsoft.Terminal.Core.Color Foreground;
Microsoft.Terminal.Core.Color Background;
Microsoft.Terminal.Core.Color SelectionBackground;
Microsoft.Terminal.Core.Color CursorColor;
// winrt::com_arrays prevent data binding.
// Instead of representing Table as a property,
// we expose the getter as a function.
Microsoft.Terminal.Core.Color[] Table();
void SetColorTableEntry(UInt8 index, Microsoft.Terminal.Core.Color value);
}
}