mirror of https://github.com/dahall/Vanara.git
226 lines
9.5 KiB
C#
226 lines
9.5 KiB
C#
using System;
|
|
using System.Collections;
|
|
using System.Collections.Generic;
|
|
using System.Diagnostics;
|
|
using System.Linq;
|
|
using Vanara.Extensions;
|
|
using Vanara.InteropServices;
|
|
|
|
namespace Vanara.PInvoke
|
|
{
|
|
public static partial class Shell32
|
|
{
|
|
/// <summary>Represents a managed pointer to an ITEMIDLIST.</summary>
|
|
/// <seealso cref="System.Collections.Generic.IEnumerable{PIDL}"/>
|
|
[PInvokeData("Shtypes.h", MSDNShortId = "bb773321")]
|
|
public class PIDL : GenericSafeHandle, IEnumerable<PIDL>, IEquatable<PIDL>, IEquatable<IntPtr>
|
|
{
|
|
/// <summary>Initializes a new instance of the <see cref="PIDL"/> class.</summary>
|
|
/// <param name="pidl">The raw pointer to a native ITEMIDLIST.</param>
|
|
/// <param name="clone">if set to <c>true</c> clone the list before storing it.</param>
|
|
/// <param name="own">if set to <c>true</c><see cref="PIDL"/> will release the memory associated with the ITEMIDLIST when done.</param>
|
|
public PIDL(IntPtr pidl, bool clone = false, bool own = true) : base(clone ? IntILClone(pidl) : pidl, Free, clone || own) { }
|
|
|
|
/// <summary>Initializes a new instance of the <see cref="PIDL"/> class.</summary>
|
|
/// <param name="pidl">An existing <see cref="PIDL"/> that will be copied and managed.</param>
|
|
public PIDL(PIDL pidl) : this(pidl.handle, true) { }
|
|
|
|
/// <summary>Initializes a new instance of the <see cref="PIDL"/> class from a file path.</summary>
|
|
/// <param name="path">A string that contains the path.</param>
|
|
public PIDL(string path) : this(IntILCreateFromPath(path)) { }
|
|
|
|
/// <summary>Initializes a new instance of the <see cref="PIDL"/> class.</summary>
|
|
internal PIDL() : base(Free) { }
|
|
|
|
/// <summary>Gets a value representing a NULL PIDL.</summary>
|
|
/// <value>The null equivalent.</value>
|
|
public static PIDL Null { get; } = new PIDL();
|
|
|
|
/// <summary>Gets a value indicating whether this list is empty.</summary>
|
|
/// <value><c>true</c> if this list is empty; otherwise, <c>false</c>.</value>
|
|
public bool IsEmpty => ILIsEmpty(handle);
|
|
|
|
/// <summary>Gets the last SHITEMID in this ITEMIDLIST.</summary>
|
|
/// <value>The last SHITEMID.</value>
|
|
public PIDL LastId => new PIDL(ILFindLastID(handle), true);
|
|
|
|
/// <summary>Gets an ITEMIDLIST with the last ID removed. If this is the topmost ID, a clone of the current is returned.</summary>
|
|
public PIDL Parent
|
|
{
|
|
get
|
|
{
|
|
var p = new PIDL(this);
|
|
p.RemoveLastId();
|
|
return p;
|
|
}
|
|
}
|
|
|
|
/// <summary>Gets the size, in bytes, of the ITEMIDLIST.</summary>
|
|
public uint Size => ILGetSize(handle);
|
|
|
|
/// <summary>Combines the specified <see cref="PIDL"/> instances to create a new one.</summary>
|
|
/// <param name="firstPidl">The first <see cref="PIDL"/>.</param>
|
|
/// <param name="secondPidl">The second <see cref="PIDL"/>.</param>
|
|
/// <returns>A managed <see cref="PIDL"/> instance that contains both supplied lists in their respective order.</returns>
|
|
public static PIDL Combine(PIDL firstPidl, PIDL secondPidl) => ILCombine(firstPidl.handle, secondPidl.handle);
|
|
|
|
/// <summary>Performs an explicit conversion from <see cref="PIDL"/> to <see cref="IntPtr"/>.</summary>
|
|
/// <param name="pidl">The current <see cref="PIDL"/>.</param>
|
|
/// <returns>The result of the conversion.</returns>
|
|
public static explicit operator IntPtr(PIDL pidl) => pidl.handle;
|
|
|
|
/// <summary>Performs an implicit conversion from <see cref="IntPtr"/> to <see cref="PIDL"/>.</summary>
|
|
/// <param name="p">The pointer to a raw ITEMIDLIST.</param>
|
|
/// <returns>The result of the conversion.</returns>
|
|
public static implicit operator PIDL(IntPtr p) => new PIDL(p);
|
|
|
|
/// <summary>Combines the specified <see cref="PIDL"/> instances to create a new one.</summary>
|
|
/// <param name="first">The first <see cref="PIDL"/>.</param>
|
|
/// <param name="second">The second <see cref="PIDL"/>.</param>
|
|
/// <returns>A managed <see cref="PIDL"/> instance that contains both supplied lists in their respective order.</returns>
|
|
public static PIDL operator +(PIDL first, PIDL second) => Combine(first, second);
|
|
|
|
/// <summary>Appends the specified <see cref="PIDL"/> to the existing list.</summary>
|
|
/// <param name="appendPidl">The <see cref="PIDL"/> to append.</param>
|
|
public void Append(PIDL appendPidl)
|
|
{
|
|
var newPidl = IntILCombine(handle, appendPidl.DangerousGetHandle());
|
|
Free(handle);
|
|
SetHandle(newPidl);
|
|
}
|
|
|
|
/// <summary>Dumps this instance to a string a list of binary values.</summary>
|
|
/// <returns>A binary string of the contents.</returns>
|
|
public string Dump() => string.Join(" ", handle.ToIEnum<byte>((int)Size).Select(b => $"{b:X2}").ToArray());
|
|
|
|
/// <summary>Determines whether the specified <see cref="System.Object"/>, is equal to this instance.</summary>
|
|
/// <param name="obj">The <see cref="System.Object"/> to compare with this instance.</param>
|
|
/// <returns><c>true</c> if the specified <see cref="System.Object"/> is equal to this instance; otherwise, <c>false</c>.</returns>
|
|
public override bool Equals(object obj)
|
|
{
|
|
switch (obj)
|
|
{
|
|
case null:
|
|
return IsEmpty;
|
|
|
|
case PIDL pidl:
|
|
return Equals(pidl);
|
|
|
|
case IntPtr ptr:
|
|
return Equals(ptr);
|
|
|
|
default:
|
|
return base.Equals(obj);
|
|
}
|
|
}
|
|
|
|
/// <summary>Indicates whether the current object is equal to another object of the same type.</summary>
|
|
/// <param name="other">An object to compare with this object.</param>
|
|
/// <returns>true if the current object is equal to the <paramref name="other"/> parameter; otherwise, false.</returns>
|
|
public bool Equals(IntPtr other) => ILIsEqual(handle, other);
|
|
|
|
/// <summary>Indicates whether the current object is equal to another object of the same type.</summary>
|
|
/// <param name="other">An object to compare with this object.</param>
|
|
/// <returns>true if the current object is equal to the <paramref name="other"/> parameter; otherwise, false.</returns>
|
|
public bool Equals(PIDL other) => Equals(other?.handle ?? IntPtr.Zero);
|
|
|
|
/// <summary>Returns an enumerator that iterates through the collection.</summary>
|
|
/// <returns>A <see cref="T:System.Collections.Generic.IEnumerator{PIDL}"/> that can be used to iterate through the collection.</returns>
|
|
public IEnumerator<PIDL> GetEnumerator() => new InternalEnumerator(handle);
|
|
|
|
/// <summary>Returns a hash code for this instance.</summary>
|
|
/// <returns>A hash code for this instance, suitable for use in hashing algorithms and data structures like a hash table.</returns>
|
|
public override int GetHashCode() => new Collections.EnumerableEqualityComparer<byte>().GetHashCode(handle.ToIEnum<byte>((int)Size));
|
|
|
|
/// <summary>Inserts the specified <see cref="PIDL"/> before the existing list.</summary>
|
|
/// <param name="insertPidl">The <see cref="PIDL"/> to insert.</param>
|
|
public void Insert(PIDL insertPidl)
|
|
{
|
|
var newPidl = IntILCombine(insertPidl.handle, handle);
|
|
Free(handle);
|
|
SetHandle(newPidl);
|
|
}
|
|
|
|
/// <summary>Determines if this instance is a parent or ancestor of a supplied PIDL.</summary>
|
|
/// <param name="childPidl">Child instance to test.</param>
|
|
/// <param name="immediate">If <c>true</c>, narrows test to immediate children only.</param>
|
|
/// <returns><c>true</c> if this instance is a parent or ancestor of a supplied PIDL.</returns>
|
|
public bool IsParentOf(PIDL childPidl, bool immediate = true) => ILIsParent((IntPtr)this, (IntPtr)childPidl, immediate);
|
|
|
|
/// <summary>Removes the last identifier from the list.</summary>
|
|
public bool RemoveLastId() => ILRemoveLastID(handle);
|
|
|
|
/// <summary>Returns a <see cref="System.String"/> that represents this instance.</summary>
|
|
/// <returns>A <see cref="System.String"/> that represents this instance.</returns>
|
|
public override string ToString() => ToString(SIGDN.SIGDN_NORMALDISPLAY);
|
|
|
|
/// <summary>
|
|
/// Returns a <see cref="System.String"/> that represents this instance base according to the format provided by <paramref name="displayNameFormat"/>.
|
|
/// </summary>
|
|
/// <param name="displayNameFormat">The desired display name format.</param>
|
|
/// <returns>A <see cref="System.String"/> that represents this instance.</returns>
|
|
public string ToString(SIGDN displayNameFormat)
|
|
{
|
|
try
|
|
{
|
|
SHGetNameFromIDList(this, displayNameFormat, out var name).ThrowIfFailed();
|
|
return name;
|
|
}
|
|
catch (Exception ex) { Debug.WriteLine($"Error: PIDL:ToString = {ex}"); }
|
|
return null;
|
|
}
|
|
|
|
/// <summary>Returns an enumerator that iterates through a collection.</summary>
|
|
/// <returns>An <see cref="T:System.Collections.IEnumerator"/> object that can be used to iterate through the collection.</returns>
|
|
IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
|
|
|
|
private static bool Free(IntPtr pidl)
|
|
{
|
|
ILFree(pidl); return true;
|
|
}
|
|
|
|
private class InternalEnumerator : IEnumerator<PIDL>
|
|
{
|
|
private readonly IntPtr pidl;
|
|
private IntPtr currentPidl;
|
|
private bool start;
|
|
|
|
public InternalEnumerator(IntPtr handle)
|
|
{
|
|
start = true;
|
|
pidl = handle;
|
|
currentPidl = IntPtr.Zero;
|
|
}
|
|
|
|
public PIDL Current => currentPidl == IntPtr.Zero ? null : ILCloneFirst(currentPidl);
|
|
|
|
object IEnumerator.Current => Current;
|
|
|
|
public void Dispose()
|
|
{
|
|
}
|
|
|
|
public bool MoveNext()
|
|
{
|
|
if (start)
|
|
{
|
|
start = false;
|
|
currentPidl = pidl;
|
|
return true;
|
|
}
|
|
|
|
var newPidl = ILNext(currentPidl);
|
|
if (ILIsEmpty(newPidl)) return false;
|
|
currentPidl = newPidl;
|
|
return true;
|
|
}
|
|
|
|
public void Reset()
|
|
{
|
|
start = true;
|
|
currentPidl = IntPtr.Zero;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} |