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235 lines
9.2 KiB
C#
235 lines
9.2 KiB
C#
#region License Information (GPL v3)
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/*
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ShareX - A program that allows you to take screenshots and share any file type
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Copyright (c) 2007-2018 ShareX Team
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Optionally you can also view the license at <http://www.gnu.org/licenses/>.
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*/
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#endregion License Information (GPL v3)
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using ShareX.HelpersLib;
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using System;
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using System.Drawing;
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using System.Runtime.InteropServices;
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namespace ShareX.UploadersLib
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{
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/// <summary>
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/// Provides static methods to read system icons for both folders and files.
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/// </summary>
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/// <example>
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/// <code>IconReader.GetFileIcon("c:\\general.xls");</code>
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/// </example>
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public class IconReader
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{
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/// <summary>
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/// Options to specify the size of icons to return.
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/// </summary>
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public enum IconSize
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{
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/// <summary>
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/// Specify large icon - 32 pixels by 32 pixels.
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/// </summary>
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Large = 0,
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/// <summary>
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/// Specify small icon - 16 pixels by 16 pixels.
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/// </summary>
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Small = 1
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}
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/// <summary>
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/// Options to specify whether folders should be in the open or closed state.
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/// </summary>
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public enum FolderType
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{
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/// <summary>
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/// Specify open folder.
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/// </summary>
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Open = 0,
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/// <summary>
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/// Specify closed folder.
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/// </summary>
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Closed = 1
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}
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/// <summary>
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/// Returns an icon for a given file - indicated by the name parameter.
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/// </summary>
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/// <param name="name">Pathname for file.</param>
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/// <param name="size">Large or small</param>
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/// <param name="linkOverlay">Whether to include the link icon</param>
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/// <returns>System.Drawing.Icon</returns>
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public static Icon GetFileIcon(string name, IconSize size, bool linkOverlay)
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{
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uint flags = Shell32.SHGFI_ICON | Shell32.SHGFI_USEFILEATTRIBUTES;
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if (linkOverlay) flags += Shell32.SHGFI_LINKOVERLAY;
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if (IconSize.Small == size)
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{
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flags += Shell32.SHGFI_SMALLICON;
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}
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else
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{
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flags += Shell32.SHGFI_LARGEICON;
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}
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Shell32.SHFILEINFO shfi = new Shell32.SHFILEINFO();
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Shell32.SHGetFileInfo(name, Shell32.FILE_ATTRIBUTE_NORMAL, ref shfi, (uint)Marshal.SizeOf(shfi), flags);
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// Copy (clone) the returned icon to a new object, thus allowing us to clean-up properly
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Icon icon = (Icon)Icon.FromHandle(shfi.hIcon).Clone();
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NativeMethods.DestroyIcon(shfi.hIcon); // Cleanup
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return icon;
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}
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/// <summary>
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/// Used to access system folder icons.
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/// </summary>
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/// <param name="size">Specify large or small icons.</param>
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/// <param name="folderType">Specify open or closed FolderType.</param>
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/// <returns>System.Drawing.Icon</returns>
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public static Icon GetFolderIcon(IconSize size, FolderType folderType)
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{
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// Need to add size check, although errors generated at present!
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uint flags = Shell32.SHGFI_ICON; // | Shell32.SHGFI_USEFILEATTRIBUTES;
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if (FolderType.Open == folderType)
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{
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flags += Shell32.SHGFI_OPENICON;
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}
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if (IconSize.Small == size)
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{
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flags += Shell32.SHGFI_SMALLICON;
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}
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else
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{
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flags += Shell32.SHGFI_LARGEICON;
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}
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Shell32.SHFILEINFO shfi = new Shell32.SHFILEINFO();
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Shell32.SHGetFileInfo(null, Shell32.FILE_ATTRIBUTE_DIRECTORY, ref shfi, (uint)Marshal.SizeOf(shfi), flags);
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// Now clone the icon, so that it can be successfully stored in an ImageList
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Icon icon = (Icon)Icon.FromHandle(shfi.hIcon).Clone();
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NativeMethods.DestroyIcon(shfi.hIcon); // Cleanup
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return icon;
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}
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public static string GetDisplayName(string name, bool isDirectory)
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{
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uint flags = Shell32.SHGFI_TYPENAME | Shell32.SHGFI_USEFILEATTRIBUTES;
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Shell32.SHFILEINFO shfi = new Shell32.SHFILEINFO();
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uint fileType = isDirectory ? Shell32.FILE_ATTRIBUTE_DIRECTORY : Shell32.FILE_ATTRIBUTE_NORMAL;
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Shell32.SHGetFileInfo(name, fileType, ref shfi, (uint)Marshal.SizeOf(shfi), flags);
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return shfi.szTypeName;
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}
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}
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/// <summary>
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/// Wraps necessary Shell32.dll structures and functions required to retrieve Icon Handles using SHGetFileInfo. Code
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/// courtesy of MSDN Cold Rooster Consulting case study.
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/// </summary>
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// This code has been left largely untouched from that in the CRC example. The main changes have been moving
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// the icon reading code over to the IconReader type.
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public class Shell32
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{
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[StructLayout(LayoutKind.Sequential)]
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public struct SHITEMID
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{
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public ushort cb;
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[MarshalAs(UnmanagedType.LPArray)]
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public byte[] abID;
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct ITEMIDLIST
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{
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public SHITEMID mkid;
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct BROWSEINFO
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{
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public IntPtr hwndOwner;
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public IntPtr pidlRoot;
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public IntPtr pszDisplayName;
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[MarshalAs(UnmanagedType.LPTStr)]
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public string lpszTitle;
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public uint ulFlags;
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public IntPtr lpfn;
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public int lParam;
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public IntPtr iImage;
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}
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// Browsing for directory.
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public const uint BIF_RETURNONLYFSDIRS = 0x0001;
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public const uint BIF_DONTGOBELOWDOMAIN = 0x0002;
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public const uint BIF_STATUSTEXT = 0x0004;
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public const uint BIF_RETURNFSANCESTORS = 0x0008;
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public const uint BIF_EDITBOX = 0x0010;
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public const uint BIF_VALIDATE = 0x0020;
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public const uint BIF_NEWDIALOGSTYLE = 0x0040;
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public const uint BIF_USENEWUI = BIF_NEWDIALOGSTYLE | BIF_EDITBOX;
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public const uint BIF_BROWSEINCLUDEURLS = 0x0080;
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public const uint BIF_BROWSEFORCOMPUTER = 0x1000;
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public const uint BIF_BROWSEFORPRINTER = 0x2000;
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public const uint BIF_BROWSEINCLUDEFILES = 0x4000;
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public const uint BIF_SHAREABLE = 0x8000;
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[StructLayout(LayoutKind.Sequential)]
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public struct SHFILEINFO
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{
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public IntPtr hIcon;
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public int iIcon;
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public uint dwAttributes;
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[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
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public string szDisplayName;
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[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
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public string szTypeName;
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}
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public const uint SHGFI_ICON = 0x000000100; // get icon
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public const uint SHGFI_DISPLAYNAME = 0x000000200; // get display name
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public const uint SHGFI_TYPENAME = 0x000000400; // get type name
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public const uint SHGFI_ATTRIBUTES = 0x000000800; // get attributes
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public const uint SHGFI_ICONLOCATION = 0x000001000; // get icon location
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public const uint SHGFI_EXETYPE = 0x000002000; // return exe type
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public const uint SHGFI_SYSICONINDEX = 0x000004000; // get system icon index
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public const uint SHGFI_LINKOVERLAY = 0x000008000; // put a link overlay on icon
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public const uint SHGFI_SELECTED = 0x000010000; // show icon in selected state
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public const uint SHGFI_ATTR_SPECIFIED = 0x000020000; // get only specified attributes
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public const uint SHGFI_LARGEICON = 0x000000000; // get large icon
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public const uint SHGFI_SMALLICON = 0x000000001; // get small icon
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public const uint SHGFI_OPENICON = 0x000000002; // get open icon
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public const uint SHGFI_SHELLICONSIZE = 0x000000004; // get shell size icon
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public const uint SHGFI_PIDL = 0x000000008; // pszPath is a pidl
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public const uint SHGFI_USEFILEATTRIBUTES = 0x000000010; // use passed dwFileAttribute
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public const uint SHGFI_ADDOVERLAYS = 0x000000020; // apply the appropriate overlays
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public const uint SHGFI_OVERLAYINDEX = 0x000000040; // Get the index of the overlay
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public const uint FILE_ATTRIBUTE_DIRECTORY = 0x00000010;
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public const uint FILE_ATTRIBUTE_NORMAL = 0x00000080;
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[DllImport("shell32.dll")]
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public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbFileInfo, uint uFlags);
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}
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} |