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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Drawing;
namespace System.Windows.Forms.Tests.Text;
public class FontMetrics
{
[Theory]
[InlineData("Arial", 9.0f, 15)]
[InlineData("Arial", 12.0f, 18)]
[InlineData("Microsoft Sans Serif", 16.0f, 26)]
[InlineData("Times New Roman", 11.0f, 17)]
[InlineData("MS Gothic", 10.0f, 14)]
public void Font_GetHeight(string family, float size, int height)
{
using Font font = new(family, size);
if (font.Name != family)
{
// Not installed on this machine
return;
}
using var hfont = GdiCache.GetHFONTScope(font, FONT_QUALITY.CLEARTYPE_QUALITY);
Assert.Equal(height, hfont.Data.Height);
}
[Theory]
[InlineData("Arial", 9.0f, 3, 4)]
[InlineData("Arial", 12.0f, 3, 5)]
[InlineData("Microsoft Sans Serif", 16.0f, 5, 7)]
[InlineData("Times New Roman", 11.0f, 3, 5)]
[InlineData("MS Gothic", 10.0f, 3, 4)]
public void Font_GetTextMargins(string family, float size, int left, int right)
{
using Font font = new(family, size);
if (font.Name != family)
{
// Not installed on this machine
return;
}
using var hfont = GdiCache.GetHFONTScope(font, FONT_QUALITY.CLEARTYPE_QUALITY);
DRAWTEXTPARAMS margins = hfont.GetTextMargins();
Assert.Equal(left, margins.iLeftMargin);
Assert.Equal(right, margins.iRightMargin);
}
[Theory]
[InlineData("Arial", 9.0f, 73, 15)]
[InlineData("Arial", 12.0f, 95, 18)]
[InlineData("Microsoft Sans Serif", 16.0f, 136, 26)]
[InlineData("Times New Roman", 11.0f, 84, 17)]
[InlineData("MS Gothic", 10.0f, 91, 14)]
public void Font_GetTextExtent(string family, float size, int width, int height)
{
using Font font = new(family, size);
if (font.Name != family)
{
// Not installed on this machine
return;
}
using var hfont = GdiCache.GetHFONTScope(font, FONT_QUALITY.CLEARTYPE_QUALITY);
using var screen = GdiCache.GetScreenHdc();
Size extent = screen.HDC.GetTextExtent("Whizzo Butter", hfont);
Assert.Equal(width, extent.Width);
Assert.Equal(height, extent.Height);
}
[Theory(Skip = "Flaky in debug builds. See: https://github.com/dotnet/winforms/issues/8612")]
[MemberData(nameof(MeasureTextData))]
public void Font_MeasureText(string family, float size, Size proposedSize, uint dt, Size expected)
{
using Font font = new(family, size);
if (font.Name != family)
{
// Not installed on this machine
return;
}
using var hfont = GdiCache.GetHFONTScope(font, FONT_QUALITY.CLEARTYPE_QUALITY);
using var screen = GdiCache.GetScreenHdc();
Size measure = screen.HDC.MeasureText("Windows Foundation Classes", hfont, proposedSize, (TextFormatFlags)dt);
Assert.Equal(expected, measure);
}
public static TheoryData<string, float, Size, uint, Size> MeasureTextData =>
new()
{
{ "Arial", 9.0f, new Size(-1, -1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(173, 15) },
{ "Arial", 12.0f, new Size(-1, -1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(215, 18) },
{ "Microsoft Sans Serif", 16.0f, new Size(-1, -1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(299, 26) },
{ "Times New Roman", 11.0f, new Size(-1, -1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(179, 17) },
{ "MS Gothic", 10.0f, new Size(-1, -1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(189, 14) },
{ "Arial", 9.0f, new Size(0, 0), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(173, 15) },
{ "Arial", 12.0f, new Size(0, 0), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(215, 18) },
{ "Microsoft Sans Serif", 16.0f, new Size(0, 0), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(299, 26) },
{ "Times New Roman", 11.0f, new Size(0, 0), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(179, 17) },
{ "MS Gothic", 10.0f, new Size(0, 0), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(189, 14) },
{ "Arial", 9.0f, new Size(1, 1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(173, 15) },
{ "Arial", 12.0f, new Size(1, 1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(215, 18) },
{ "Microsoft Sans Serif", 16.0f, new Size(1, 1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(299, 26) },
{ "Times New Roman", 11.0f, new Size(1, 1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(179, 17) },
{ "MS Gothic", 10.0f, new Size(1, 1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(189, 14) },
{ "Arial", 9.0f, new Size(300, 300), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(173, 15) },
{ "Arial", 12.0f, new Size(300, 300), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(215, 18) },
{ "Microsoft Sans Serif", 16.0f, new Size(300, 300), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(299, 26) },
{ "Times New Roman", 11.0f, new Size(300, 300), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(179, 17) },
{ "MS Gothic", 10.0f, new Size(300, 300), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(189, 14) },
{ "Arial", 9.0f, new Size(int.MaxValue, int.MaxValue), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(173, 15) },
{ "Arial", 12.0f, new Size(int.MaxValue, int.MaxValue), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(215, 18) },
{ "Microsoft Sans Serif", 16.0f, new Size(int.MaxValue, int.MaxValue), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(299, 26) },
{ "Times New Roman", 11.0f, new Size(int.MaxValue, int.MaxValue), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(179, 17) },
{ "MS Gothic", 10.0f, new Size(int.MaxValue, int.MaxValue), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Size(189, 14) },
{ "Arial", 9.0f, new Size(1, 1), (uint)DRAW_TEXT_FORMAT.DT_SINGLELINE, new Size(173, 15) },
{ "Arial", 12.0f, new Size(1, 1), (uint)DRAW_TEXT_FORMAT.DT_SINGLELINE, new Size(215, 18) },
{ "Microsoft Sans Serif", 16.0f, new Size(1, 1), (uint)DRAW_TEXT_FORMAT.DT_SINGLELINE, new Size(299, 26) },
{ "Times New Roman", 11.0f, new Size(1, 1), (uint)DRAW_TEXT_FORMAT.DT_SINGLELINE, new Size(179, 17) },
{ "MS Gothic", 10.0f, new Size(1, 1), (uint)DRAW_TEXT_FORMAT.DT_SINGLELINE, new Size(189, 14) },
{ "Arial", 9.0f, new Size(int.MaxValue, int.MaxValue), (uint)DRAW_TEXT_FORMAT.DT_SINGLELINE, new Size(173, 15) },
{ "Arial", 12.0f, new Size(int.MaxValue, int.MaxValue), (uint)DRAW_TEXT_FORMAT.DT_SINGLELINE, new Size(215, 18) },
{ "Microsoft Sans Serif", 16.0f, new Size(int.MaxValue, int.MaxValue), (uint)DRAW_TEXT_FORMAT.DT_SINGLELINE, new Size(299, 26) },
{ "Times New Roman", 11.0f, new Size(int.MaxValue, int.MaxValue), (uint)DRAW_TEXT_FORMAT.DT_SINGLELINE, new Size(179, 17) },
{ "MS Gothic", 10.0f, new Size(int.MaxValue, int.MaxValue), (uint)DRAW_TEXT_FORMAT.DT_SINGLELINE, new Size(189, 14) },
};
[Theory]
[MemberData(nameof(AdjustData))]
public unsafe void Font_AdjustForVerticalAlignment(string family, float size, Rectangle bounds, uint dt, Rectangle expected)
{
using Font font = new(family, size);
if (font.Name != family)
{
// Not installed on this machine
return;
}
using var hfont = GdiCache.GetHFONTScope(font, FONT_QUALITY.CLEARTYPE_QUALITY);
using var screen = GdiCache.GetScreenHdc();
using SelectObjectScope fontSelection = new(screen, hfont.Object);
DRAWTEXTPARAMS param = default;
Rectangle result = screen.HDC.AdjustForVerticalAlignment(
"Windows Foundation Classes",
bounds,
(DRAW_TEXT_FORMAT)dt,
¶m);
Assert.Equal(expected, result);
}
public static TheoryData<string, float, Rectangle, uint, Rectangle> AdjustData =>
new()
{
{ "Arial", 9.0f, new Rectangle(1, 1, 1, 1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Rectangle(1, 1, 1, 1) },
{ "Arial", 12.0f, new Rectangle(1, 1, 1, 1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Rectangle(1, 1, 1, 1) },
{ "Microsoft Sans Serif", 16.0f, new Rectangle(1, 1, 1, 1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Rectangle(1, 1, 1, 1) },
{ "Times New Roman", 11.0f, new Rectangle(1, 1, 1, 1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Rectangle(1, 1, 1, 1) },
{ "MS Gothic", 10.0f, new Rectangle(1, 1, 1, 1), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Rectangle(1, 1, 1, 1) },
{ "Arial", 9.0f, new Rectangle(1, 1, 100, 100), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Rectangle(1, 86, 100, 100) },
{ "Arial", 12.0f, new Rectangle(1, 1, 100, 100), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Rectangle(1, 83, 100, 100) },
{ "Microsoft Sans Serif", 16.0f, new Rectangle(1, 1, 100, 100), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Rectangle(1, 75, 100, 100) },
{ "Times New Roman", 11.0f, new Rectangle(1, 1, 100, 100), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Rectangle(1, 84, 100, 100) },
{ "MS Gothic", 10.0f, new Rectangle(1, 1, 100, 100), (uint)DRAW_TEXT_FORMAT.DT_BOTTOM, new Rectangle(1, 87, 100, 100) },
};
}
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