src/Serilog/Rendering/Padding.cs - dev - aprogrammer/serilog

src/Serilog/Rendering/Padding.cs
82 строки3 KB
Ivan Maximov
Make Alignment and LevelOverride readonly (#1884)
29 мар 2023, 05:45
29 мар 2023, 05:456b4fe06
// Copyright 2013-2017 Serilog Contributors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

namespace Serilog.Rendering;

static class Padding
{
    static readonly char[] PaddingChars = Enumerable.Repeat(' ', 80).ToArray();

    /// <summary>
    /// Writes the provided value to the output, applying direction-based padding when <paramref name="alignment"/> is provided.
    /// </summary>
    public static void Apply(TextWriter output, string value, in Alignment? alignment)
    {
        if (alignment == null || value.Length >= alignment.Value.Width)
        {
            output.Write(value);
            return;
        }

        var pad = alignment.Value.Width - value.Length;

        if (alignment.Value.Direction == AlignmentDirection.Left)
            output.Write(value);

        if (pad <= PaddingChars.Length)
        {
            output.Write(PaddingChars, 0, pad);
        }
        else
        {
            output.Write(new string(' ', pad));
        }

        if (alignment.Value.Direction == AlignmentDirection.Right)
            output.Write(value);
    }

#if FEATURE_WRITE_STRINGBUILDER
    /// <summary>
    /// Writes the provided value to the output, applying direction-based padding when <paramref name="alignment"/> is provided.
    /// This is a full copy of the method above that allows to write <see cref="StringBuilder"/> directly into provided
    /// <paramref name="output"/> without <see cref="StringBuilder.ToString()"/> call on the caller side.
    /// </summary>
    public static void Apply(TextWriter output, StringBuilder value, in Alignment? alignment)
    {
        if (alignment == null || value.Length >= alignment.Value.Width)
        {
            output.Write(value);
            return;
        }

        var pad = alignment.Value.Width - value.Length;

        if (alignment.Value.Direction == AlignmentDirection.Left)
            output.Write(value);

        if (pad <= PaddingChars.Length)
        {
            output.Write(PaddingChars, 0, pad);
        }
        else
        {
            output.Write(new string(' ', pad));
        }

        if (alignment.Value.Direction == AlignmentDirection.Right)
            output.Write(value);
    }
#endif
}