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79 lines
2.6 KiB
C#
79 lines
2.6 KiB
C#
/*
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* Greenshot - a free and open source screenshot tool
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* Copyright (C) 2007-2021 Thomas Braun, Jens Klingen, Robin Krom
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*
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* For more information see: http://getgreenshot.org/
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* The Greenshot project is hosted on GitHub https://github.com/greenshot/greenshot
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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namespace GreenshotOCRCommand {
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/// <summary>
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/// An attribute to specifiy the ProgID of the COM class to create. (As suggested by Kristen Wegner)
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/// </summary>
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[AttributeUsage(AttributeTargets.Interface)]
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public sealed class ComProgIdAttribute : Attribute {
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/// <summary>
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/// Extracts the attribute from the specified type.
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/// </summary>
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/// <param name="interfaceType">
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/// The interface type.
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/// </param>
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/// <returns>
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/// The <see cref="ComProgIdAttribute"/>.
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/// </returns>
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/// <exception cref="ArgumentNullException">
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/// <paramref name="interfaceType"/> is <see langword="null"/>.
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/// </exception>
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public static ComProgIdAttribute GetAttribute(Type interfaceType) {
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if (null == interfaceType) {
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throw new ArgumentNullException(nameof(interfaceType));
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}
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Type attributeType = typeof(ComProgIdAttribute);
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object[] attributes = interfaceType.GetCustomAttributes(attributeType, false);
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if (0 == attributes.Length) {
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Type[] interfaces = interfaceType.GetInterfaces();
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for (int i = 0; i < interfaces.Length; i++) {
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interfaceType = interfaces[i];
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attributes = interfaceType.GetCustomAttributes(attributeType, false);
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if (0 != attributes.Length) {
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break;
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}
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}
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}
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if (0 == attributes.Length) {
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return null;
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}
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return (ComProgIdAttribute)attributes[0];
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}
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/// <summary>Constructor</summary>
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/// <param name="value">The COM ProgID.</param>
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public ComProgIdAttribute(string value) {
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Value = value;
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}
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/// <summary>
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/// Returns the COM ProgID
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/// </summary>
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public string Value { get; }
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}
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}
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