25022127077

Committed 27 Apr 2026 10:06PM UTC coverage: 85.902% (+0.2%) from 85.669%

Build # 25022127077

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push

github

Committed by

HebaruSan

Commit Message

Merge #4591 Layout and scaling related fixes

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35 of 37 new or added lines in 7 files covered. (94.59%)

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94.44

/Core/Extensions/EnumerableExtensions.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Concurrent;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace CKAN.Extensions
{
    public static class EnumerableExtensions
    {
        public static ConcurrentDictionary<K, V> ToConcurrentDictionary<K, V>(this IEnumerable<KeyValuePair<K, V>> pairs)
            where K : class
            => new ConcurrentDictionary<K, V>(pairs);

        public static IEnumerable<T> AsParallelIf<T>(this IEnumerable<T> source,
                                                     bool                parallel)
            => parallel ? source.AsParallel()
                        : source;

        // https://stackoverflow.com/a/55591477/2422988
        public static ParallelQuery<T> WithProgress<T>(this ParallelQuery<T> source,
                                                       long                  totalCount,
                                                       IProgress<int>?       progress)
        {
            long count       = 0;
            int  prevPercent = -1;
            return progress == null
                ? source
                : source.Select(item =>
                {
                    var percent = (int)(100 * Interlocked.Increment(ref count) / totalCount);
                    if (percent > prevPercent)
                    {
                        progress.Report(percent);
                        prevPercent = percent;
                    }
                    return item;
                });
        }

        public static IEnumerable<T> Memoize<T>(this IEnumerable<T> source)
            => source is Memoized<T>
                   // Already memoized, don't wrap another layer
                   ? source
                   : new Memoized<T>(source);

        public static void RemoveWhere<K, V>(this Dictionary<K, V> source,
                                             Func<KeyValuePair<K, V>, bool> predicate)
            where K : class
        {
            var pairs = source.ToList();
            foreach (var kvp in pairs)
            {
                if (predicate(kvp))
                {
                    source.Remove(kvp.Key);
                }
            }
        }

        public static bool IntersectsWith<T>(this IEnumerable<T> source,
                                             IEnumerable<T>      other)
            => source.Intersect(other).Any();

        /// <summary>
        /// Sum a sequence of TimeSpans.
        /// Mysteriously not defined standardly.
        /// </summary>
        /// <param name="source">Sequence of TimeSpans to sum</param>
        /// <returns>
        /// Sum of the TimeSpans
        /// </returns>
        public static TimeSpan Sum(this IEnumerable<TimeSpan> source)
            => source.Aggregate(TimeSpan.Zero,
                                (a, b) => a + b);

        /// <summary>
        /// Zip a sequence with a sequence generated from the first sequence using the given function
        /// </summary>
        /// <typeparam name="T">Source sequence type</typeparam>
        /// <typeparam name="V">Type of elements returned by func</typeparam>
        /// <param name="source">Source sequence</param>
        /// <param name="func">Function to generate values of second sequence given source</param>
        /// <returns>Sequence of tuples containing pairs from each sequence</returns>
        public static IEnumerable<(T First, V Second)> ZipBy<T, V>(this IEnumerable<T> source, Func<IEnumerable<T>, IEnumerable<V>> func)
            => source.ToArray() is T[] array
                   ? array.Zip(func(array))
                   : Enumerable.Empty<(T First, V Second)>();

        /// <summary>
        /// Insert new elements between consecutive pairs of existing elements,
        /// preserving the original elements in order, and using null to
        /// represent the elements before the beginning and after the end.
        /// </summary>
        /// <param name="source">Sequence into which to inject</param>
        /// <param name="inBetween">Function to generate the new elements</param>
        /// <returns>Sequence with new elements in it</returns>
        public static IEnumerable<T> Inject<T>(this IEnumerable<T> source,
                                               Func<T?, T?, T>     inBetween)
            where T : class
        {
            using (var e = source.GetEnumerator())
            {
                if (e.MoveNext())
                {
                    yield return inBetween(null, e.Current);
                    yield return e.Current;
                    var prev = e.Current;
                    while (e.MoveNext())
                    {
                        yield return inBetween(prev, e.Current);
                        yield return e.Current;
                        prev = e.Current;
                    }
                    yield return inBetween(prev, null);
                }
                else
                {
                    yield return inBetween(null, null);
                }
            }
        }

        /// <summary>
        /// Poor man's PLINQ, a trivially parallelized SelectMany that
        /// runs one process per item in the source sequence.
        /// For short sequences and long-running functions,
        /// when you don't feel like fighting with Partitioner.Create
        /// over how many items should be in each partition.
        /// </summary>
        /// <param name="source">The sequence to process</param>
        /// <param name="func">The function to apply to each item in the sequence</param>
        /// <returns>Sequence of all values from the function</returns>
        public static IEnumerable<V> SelectManyTasks<T, V>(this IReadOnlyCollection<T> source,
                                                           Func<T, IEnumerable<V>>     func)
        {
            if (source.Count <= 1)
            {
                return source.SelectMany(func);
            }
            else
            {
                var tasks = source.Select(item => Task.Run(() => func(item).ToArray()))
                                  // Force non-lazy creation of tasks
                                  .ToArray();
                return Utilities.WithRethrowInner(() =>
                {
                    // Without this, later tasks don't finish if an earlier one throws
                    Task.WaitAll(tasks);
                    return tasks.SelectMany(task => task.Result);
                });
            }
        }

        /// <summary>
        /// Generate a sequence from a linked list
        /// </summary>
        /// <param name="start">The first node</param>
        /// <param name="getNext">Function to go from one node to the next</param>
        /// <returns>All the nodes in the list as a sequence</returns>
        public static IEnumerable<T> TraverseNodes<T>(this T start, Func<T, T?> getNext)
            where T : class
        {
            for (T? t = start; t != null; t = Utilities.DefaultIfThrows(() => getNext(t)))
            {
                yield return t;
            }
        }

        /// <summary>
        /// Apply a function to a sequence and handle any exceptions that are thrown
        /// </summary>
        /// <typeparam name="TSrc">Type of source sequence</typeparam>
        /// <typeparam name="TDest">Type of destination sequence</typeparam>
        /// <param name="source">Source sequence</param>
        /// <param name="func">Function to apply to each item</param>
        /// <param name="onThrow">Function to call if there's an exception</param>
        /// <returns>Sequence of return values of given function</returns>
        public static IEnumerable<TDest?> SelectWithCatch<TSrc, TDest>(this IEnumerable<TSrc>       source,
                                                                       Func<TSrc, TDest>             func,
                                                                       Func<TSrc, Exception, TDest?> onThrow)
                where TDest : class
            => source.Select(item => Utilities.DefaultIfThrows(()  => func(item),
                                                               exc => onThrow(item, exc)));

        /// <summary>
        /// Apply a sequence-generating function to a sequence and combine the subsequences,
        /// skipping elements in the input sequence that throw exceptions.
        /// </summary>
        /// <param name="source">The sequence to process</param>
        /// <param name="func">The function that generates more subsequences</param>
        /// <returns>Sequence of values</returns>
        public static IEnumerable<V> SelectManyWithCatch<T, V>(this IEnumerable<T>     source,
                                                               Func<T, IEnumerable<V>> func)
            => source.SelectMany(elt => Utilities.DefaultIfThrows(() => func(elt))
                                        ?? Enumerable.Empty<V>());

        /// <summary>
        /// Get a hash code for a sequence with a variable number of elements
        /// </summary>
        /// <typeparam name="T">Type of the elements in the sequence</typeparam>
        /// <param name="source">The sequence</param>
        /// <returns></returns>
        public static int ToSequenceHashCode<T>(this IEnumerable<T> source)
            => source.Aggregate(new HashCode(),
                                (hc, item) =>
                                {
                                    hc.Add(item);
                                    return hc;
                                },
                                hc => hc.ToHashCode());

        /// <summary>
        /// Accumulate a sequence of values based on a seed value and a function,
        /// similar to Aggregate but including intermediate values
        /// </summary>
        /// <typeparam name="TSource"></typeparam>
        /// <typeparam name="TResult"></typeparam>
        /// <param name="source">Input sequence</param>
        /// <param name="seed">First intermediate value, not included in return sequence</param>
        /// <param name="func">Function to transform a previous result and a next input sequence element into the next result</param>
        /// <returns></returns>
        public static IEnumerable<TResult> Accumulate<TSource, TResult>(this IEnumerable<TSource>       source,
                                                                        TResult                         seed,
                                                                        Func<TResult, TSource, TResult> func)
        {
            var result = seed;
            foreach (var item in source)
            {
                result = func(result, item);
                yield return result;


            }
        }

        public static IEnumerable<string> ExceptContainsAny(this   IEnumerable<string> source,
                                                            params string[]            strings)
            => source.Where(elt => !strings.Any(s => elt.Contains(s)));

        public static bool IsEmptyOrAny<T>(this IReadOnlyCollection<T> source,
                                           Func<T, bool>               func)
            => source.Count == 0 || source.Any(func);

        public static Dictionary<K, T[]> ToGroupedDictionary<T, K>(this IEnumerable<T> source,
                                                                   Func<T, K>          keyFunc)
            where K : notnull
            => source.GroupBy(keyFunc)
                     .ToDictionary(grp => grp.Key,
                                   grp => grp.ToArray());

        public static Dictionary<K, V[]> ToGroupedDictionary<T, K, V>(this IEnumerable<T> source,
                                                                      Func<T, K>          keyFunc,
                                                                      Func<T, V>          valFunc)
            where K : notnull
            => source.GroupBy(keyFunc, valFunc)
                     .ToDictionary(grp => grp.Key,
                                   grp => grp.ToArray());

    }

    /// <summary>
    /// Memoized lazy evaluation in C#!
    /// From https://stackoverflow.com/a/12428250/2422988
    /// </summary>
    public class Memoized<T> : IEnumerable<T>
    {
        public Memoized(IEnumerable<T> source)
        {
            this.source = source;
        }

        IEnumerator IEnumerable.GetEnumerator()
            => GetEnumerator();

        public IEnumerator<T> GetEnumerator()
        {
            lock (gate)
            {
                if (isCacheComplete)
                {
                    return cache.GetEnumerator();
                }
                else
                {
                    enumerator ??= source.GetEnumerator();
                }
            }
            return GetMemoizingEnumerator();
        }

        private IEnumerator<T> GetMemoizingEnumerator()
        {
            for (int index = 0; TryGetItem(index, out T? item); ++index)
            {
                yield return item;
            }
        }

        private bool TryGetItem(int index,
                                out T item)
        {
            lock (gate)
            {
                if (enumerator is not null && !IsItemInCache(index))
                {
                    // The iteration may have completed while waiting for the lock
                    #nullable disable
                    if (isCacheComplete)
                    {
                        item = default;
                        return false;
                    }
                    if (!enumerator.MoveNext())
                    {
                        item = default;
                        isCacheComplete = true;
                        enumerator.Dispose();
                        return false;
                    }
                    #nullable enable
                    cache.Add(enumerator.Current);
                }
                item = cache[index];
                return true;
            }
        }

        private bool IsItemInCache(int index)
            => index < cache.Count;

        private readonly IEnumerable<T>  source;
        private          IEnumerator<T>? enumerator;
        private readonly List<T>         cache = new List<T>();
        private          bool            isCacheComplete;
        private readonly object          gate = new object();
    }
}

1	using System;
2	using System.Collections;
3	using System.Collections.Generic;
4	using System.Collections.Concurrent;
5	using System.Linq;
6	using System.Threading;
7	using System.Threading.Tasks;
8
9	namespace CKAN.Extensions
10	{
11	public static class EnumerableExtensions
12	{
13	public static ConcurrentDictionary<K, V> ToConcurrentDictionary<K, V>(this IEnumerable<KeyValuePair<K, V>> pairs)
14	where K : class
15	=> new ConcurrentDictionary<K, V>(pairs);	2✔
16
17	public static IEnumerable<T> AsParallelIf<T>(this IEnumerable<T> source,
18	bool parallel)
19	=> parallel ? source.AsParallel()	2✔
20	: source;
21
22	// https://stackoverflow.com/a/55591477/2422988
23	public static ParallelQuery<T> WithProgress<T>(this ParallelQuery<T> source,
24	long totalCount,
25	IProgress<int>? progress)
26	{	2✔
27	long count = 0;	2✔
28	int prevPercent = -1;	2✔
29	return progress == null	2✔
30	? source
31	: source.Select(item =>
32	{	2✔
33	var percent = (int)(100 * Interlocked.Increment(ref count) / totalCount);	2✔
34	if (percent > prevPercent)	2✔
35	{	2✔
36	progress.Report(percent);	2✔
37	prevPercent = percent;	2✔
38	}	2✔
39	return item;	2✔
40	});	2✔
41	}	2✔
42
43	public static IEnumerable<T> Memoize<T>(this IEnumerable<T> source)
44	=> source is Memoized<T>	2✔
45	// Already memoized, don't wrap another layer
46	? source
47	: new Memoized<T>(source);
48
49	public static void RemoveWhere<K, V>(this Dictionary<K, V> source,
50	Func<KeyValuePair<K, V>, bool> predicate)
51	where K : class
52	{	2✔
53	var pairs = source.ToList();	2✔
54	foreach (var kvp in pairs)	8✔
55	{	2✔
56	if (predicate(kvp))	2✔
57	{	2✔
58	source.Remove(kvp.Key);	2✔
59	}	2✔
60	}	2✔
61	}	2✔
62
63	public static bool IntersectsWith<T>(this IEnumerable<T> source,
64	IEnumerable<T> other)
65	=> source.Intersect(other).Any();	2✔
66
67	/// <summary>
68	/// Sum a sequence of TimeSpans.
69	/// Mysteriously not defined standardly.
70	/// </summary>
71	/// <param name="source">Sequence of TimeSpans to sum</param>
72	/// <returns>
73	/// Sum of the TimeSpans
74	/// </returns>
75	public static TimeSpan Sum(this IEnumerable<TimeSpan> source)
76	=> source.Aggregate(TimeSpan.Zero,	2✔
77	(a, b) => a + b);	2✔
78
79	/// <summary>
80	/// Zip a sequence with a sequence generated from the first sequence using the given function
81	/// </summary>
82	/// <typeparam name="T">Source sequence type</typeparam>
83	/// <typeparam name="V">Type of elements returned by func</typeparam>
84	/// <param name="source">Source sequence</param>
85	/// <param name="func">Function to generate values of second sequence given source</param>
86	/// <returns>Sequence of tuples containing pairs from each sequence</returns>
87	public static IEnumerable<(T First, V Second)> ZipBy<T, V>(this IEnumerable<T> source, Func<IEnumerable<T>, IEnumerable<V>> func)
88	=> source.ToArray() is T[] array	2✔
89	? array.Zip(func(array))
90	: Enumerable.Empty<(T First, V Second)>();
91
92	/// <summary>
93	/// Insert new elements between consecutive pairs of existing elements,
94	/// preserving the original elements in order, and using null to
95	/// represent the elements before the beginning and after the end.
96	/// </summary>
97	/// <param name="source">Sequence into which to inject</param>
98	/// <param name="inBetween">Function to generate the new elements</param>
99	/// <returns>Sequence with new elements in it</returns>
100	public static IEnumerable<T> Inject<T>(this IEnumerable<T> source,
101	Func<T?, T?, T> inBetween)
102	where T : class
103	{	2✔
104	using (var e = source.GetEnumerator())	2✔
105	{	2✔
106	if (e.MoveNext())	2✔
107	{	2✔
108	yield return inBetween(null, e.Current);	2✔
109	yield return e.Current;	2✔
110	var prev = e.Current;	2✔
111	while (e.MoveNext())	2✔
112	{	2✔
113	yield return inBetween(prev, e.Current);	2✔
114	yield return e.Current;	2✔
115	prev = e.Current;	2✔
116	}	2✔
117	yield return inBetween(prev, null);	2✔
118	}	2✔
119	else
120	{	×
121	yield return inBetween(null, null);	×
122	}	×
123	}	2✔
124	}	2✔
125
126	/// <summary>
127	/// Poor man's PLINQ, a trivially parallelized SelectMany that
128	/// runs one process per item in the source sequence.
129	/// For short sequences and long-running functions,
130	/// when you don't feel like fighting with Partitioner.Create
131	/// over how many items should be in each partition.
132	/// </summary>
133	/// <param name="source">The sequence to process</param>
134	/// <param name="func">The function to apply to each item in the sequence</param>
135	/// <returns>Sequence of all values from the function</returns>
136	public static IEnumerable<V> SelectManyTasks<T, V>(this IReadOnlyCollection<T> source,
137	Func<T, IEnumerable<V>> func)
138	{	2✔
139	if (source.Count <= 1)	2✔
UNCOV 140	{	×
UNCOV 141	return source.SelectMany(func);	×
142	}
143	else
144	{	2✔
145	var tasks = source.Select(item => Task.Run(() => func(item).ToArray()))	2✔
146	// Force non-lazy creation of tasks
147	.ToArray();
148	return Utilities.WithRethrowInner(() =>	2✔
149	{	2✔
150	// Without this, later tasks don't finish if an earlier one throws
151	Task.WaitAll(tasks);	2✔
152	return tasks.SelectMany(task => task.Result);	2✔
153	});	2✔
154	}
155	}	2✔
156
157	/// <summary>
158	/// Generate a sequence from a linked list
159	/// </summary>
160	/// <param name="start">The first node</param>
161	/// <param name="getNext">Function to go from one node to the next</param>
162	/// <returns>All the nodes in the list as a sequence</returns>
163	public static IEnumerable<T> TraverseNodes<T>(this T start, Func<T, T?> getNext)
164	where T : class
165	{	2✔
166	for (T? t = start; t != null; t = Utilities.DefaultIfThrows(() => getNext(t)))	6✔
167	{	2✔
168	yield return t;	2✔
169	}	2✔
170	}	2✔
171
172	/// <summary>
173	/// Apply a function to a sequence and handle any exceptions that are thrown
174	/// </summary>
175	/// <typeparam name="TSrc">Type of source sequence</typeparam>
176	/// <typeparam name="TDest">Type of destination sequence</typeparam>
177	/// <param name="source">Source sequence</param>
178	/// <param name="func">Function to apply to each item</param>
179	/// <param name="onThrow">Function to call if there's an exception</param>
180	/// <returns>Sequence of return values of given function</returns>
181	public static IEnumerable<TDest?> SelectWithCatch<TSrc, TDest>(this IEnumerable<TSrc> source,
182	Func<TSrc, TDest> func,
183	Func<TSrc, Exception, TDest?> onThrow)
184	where TDest : class
185	=> source.Select(item => Utilities.DefaultIfThrows(() => func(item),	2✔
186	exc => onThrow(item, exc)));	2✔
187
188	/// <summary>
189	/// Apply a sequence-generating function to a sequence and combine the subsequences,
190	/// skipping elements in the input sequence that throw exceptions.
191	/// </summary>
192	/// <param name="source">The sequence to process</param>
193	/// <param name="func">The function that generates more subsequences</param>
194	/// <returns>Sequence of values</returns>
195	public static IEnumerable<V> SelectManyWithCatch<T, V>(this IEnumerable<T> source,
196	Func<T, IEnumerable<V>> func)
197	=> source.SelectMany(elt => Utilities.DefaultIfThrows(() => func(elt))	2✔
198	?? Enumerable.Empty<V>());
199
200	/// <summary>
201	/// Get a hash code for a sequence with a variable number of elements
202	/// </summary>
203	/// <typeparam name="T">Type of the elements in the sequence</typeparam>
204	/// <param name="source">The sequence</param>
205	/// <returns></returns>
206	public static int ToSequenceHashCode<T>(this IEnumerable<T> source)
207	=> source.Aggregate(new HashCode(),	2✔
208	(hc, item) =>
209	{	2✔
210	hc.Add(item);	2✔
211	return hc;	2✔
212	},	2✔
213	hc => hc.ToHashCode());	2✔
214
215	/// <summary>
216	/// Accumulate a sequence of values based on a seed value and a function,
217	/// similar to Aggregate but including intermediate values
218	/// </summary>
219	/// <typeparam name="TSource"></typeparam>
220	/// <typeparam name="TResult"></typeparam>
221	/// <param name="source">Input sequence</param>
222	/// <param name="seed">First intermediate value, not included in return sequence</param>
223	/// <param name="func">Function to transform a previous result and a next input sequence element into the next result</param>
224	/// <returns></returns>
225	public static IEnumerable<TResult> Accumulate<TSource, TResult>(this IEnumerable<TSource> source,
226	TResult seed,
227	Func<TResult, TSource, TResult> func)
228	{	2✔
229	var result = seed;	2✔
230	foreach (var item in source)	8✔
231	{	2✔
232	result = func(result, item);	2✔
233	yield return result;	2✔
234
235
236	}	2✔
237	}	×
238
239	public static IEnumerable<string> ExceptContainsAny(this IEnumerable<string> source,
240	params string[] strings)
241	=> source.Where(elt => !strings.Any(s => elt.Contains(s)));	2✔
242
243	public static bool IsEmptyOrAny<T>(this IReadOnlyCollection<T> source,
244	Func<T, bool> func)
245	=> source.Count == 0 \|\| source.Any(func);	2✔
246
247	public static Dictionary<K, T[]> ToGroupedDictionary<T, K>(this IEnumerable<T> source,
248	Func<T, K> keyFunc)
249	where K : notnull
250	=> source.GroupBy(keyFunc)	2✔
251	.ToDictionary(grp => grp.Key,	2✔
252	grp => grp.ToArray());	2✔
253
254	public static Dictionary<K, V[]> ToGroupedDictionary<T, K, V>(this IEnumerable<T> source,
255	Func<T, K> keyFunc,
256	Func<T, V> valFunc)
257	where K : notnull
258	=> source.GroupBy(keyFunc, valFunc)	2✔
259	.ToDictionary(grp => grp.Key,	2✔
260	grp => grp.ToArray());	2✔
261
262	}
263
264	/// <summary>
265	/// Memoized lazy evaluation in C#!
266	/// From https://stackoverflow.com/a/12428250/2422988
267	/// </summary>
268	public class Memoized<T> : IEnumerable<T>
269	{
270	public Memoized(IEnumerable<T> source)	2✔
271	{	2✔
272	this.source = source;	2✔
273	}	2✔
274
275	IEnumerator IEnumerable.GetEnumerator()
276	=> GetEnumerator();	2✔
277
278	public IEnumerator<T> GetEnumerator()
279	{	2✔
280	lock (gate)	2✔
281	{	2✔
282	if (isCacheComplete)	2✔
283	{	2✔
284	return cache.GetEnumerator();	2✔
285	}
286	else
287	{	2✔
288	enumerator ??= source.GetEnumerator();	2✔
289	}	2✔
290	}	2✔
291	return GetMemoizingEnumerator();	2✔
292	}	2✔
293
294	private IEnumerator<T> GetMemoizingEnumerator()
295	{	2✔
296	for (int index = 0; TryGetItem(index, out T? item); ++index)	6✔
297	{	2✔
298	yield return item;	2✔
299	}	2✔
300	}	2✔
301
302	private bool TryGetItem(int index,
303	out T item)
304	{	2✔
305	lock (gate)	2✔
306	{	2✔
307	if (enumerator is not null && !IsItemInCache(index))	2✔
308	{	2✔
309	// The iteration may have completed while waiting for the lock
310	#nullable disable
311	if (isCacheComplete)	2✔
312	{	×
313	item = default;	×
314	return false;	×
315	}
316	if (!enumerator.MoveNext())	2✔
317	{	2✔
318	item = default;	2✔
319	isCacheComplete = true;	2✔
320	enumerator.Dispose();	2✔
321	return false;	2✔
322	}
323	#nullable enable
324	cache.Add(enumerator.Current);	2✔
325	}	2✔
326	item = cache[index];	2✔
327	return true;	2✔
328	}
329	}	2✔
330
331	private bool IsItemInCache(int index)
332	=> index < cache.Count;	2✔
333
334	private readonly IEnumerable<T> source;
335	private IEnumerator<T>? enumerator;
336	private readonly List<T> cache = new List<T>();	2✔
337	private bool isCacheComplete;
338	private readonly object gate = new object();	2✔
339	}
340	}

KSP-CKAN / CKAN / 25022127077

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