Exemplo n.º 1
0
        /// <summary>
        /// Compares the spacing (as represented by grouping) of using directives in
        /// two lists. Returns null if they are the same, and otherwise returns a
        /// description of the first line at which to either remove or insert space
        /// to bring the list closer into line with the required spacing. (This presumes
        /// that the order is already correct.)
        /// </summary>
        /// <param name="requiredGroups">The required order and spacing, where
        /// spacing is denoted by grouping.</param>
        /// <param name="currentGroups">The current order and spacing.</param>
        /// <returns>Null if the spacing matches. Otherwise, a <see cref="SpaceChange"/>
        /// describing where to add or remove a blank line.</returns>
        public static SpaceChange GetNextModification(
            IEnumerable<IEnumerable<UsingDirective>> requiredGroups,
            IEnumerable<IEnumerable<UsingDirective>> currentGroups)
        {
            var requiredByGroup = requiredGroups
                .SelectMany((items, groupIndex) => items.Select(item => groupIndex));
            var currentByGroup = currentGroups
                .SelectMany((items, groupIndex) => items.Select(item => groupIndex));
            var itemsByGroup = requiredByGroup.Zip(currentByGroup, (required, actual) => new { required, actual });

            int index = 0;
            foreach (var groupIndices in itemsByGroup)
            {
                if (groupIndices.actual < groupIndices.required)
                {
                    return SpaceChange.Insert(index);
                }

                if (groupIndices.actual > groupIndices.required)
                {
                    return SpaceChange.Remove(index);
                }

                index += 1;
            }

            return null;
        }
Exemplo n.º 2
0
        /// <summary>
        /// Given a set of using directives which are already in the correct order, determines
        /// where to remove or add a blank line to bring them one step closer to the correct
        /// spacing. This method should be called repeatedly (applying each update that it
        /// generates between each call) until it returns null to indicate that the order
        /// is correct.
        /// </summary>
        /// <param name="requiredOrderByGroups">The correct order and spacing (e.g., as
        /// determined by a call to <see cref="FlattenImportsAndDetermineOrderAndSpacing"/>).</param>
        /// <param name="items">The directives as they are currently ordered and spaced.</param>
        /// <returns>Null if the directives are already in the correct order. Otherwise,
        /// a <see cref="SpaceChange"/> describing where to add or remove a blank line.</returns>
        public static SpaceChange GetNextSpacingModification(
            List <List <UsingDirective> > requiredOrderByGroups,
            List <UsingDirectiveOrSpace> items)
        {
            SpaceChange nextChange = null;

            if (requiredOrderByGroups != null)
            {
                var importsByGroup = new List <List <UsingDirective> >();
                foreach (UsingDirectiveOrSpace item in items)
                {
                    if (importsByGroup.Count == 0)
                    {
                        importsByGroup.Add(new List <UsingDirective>());
                    }

                    List <UsingDirective> currentGroup = importsByGroup[importsByGroup.Count - 1];

                    if (item.IsBlankLine)
                    {
                        if (currentGroup.Count > 0)
                        {
                            importsByGroup.Add(new List <UsingDirective>());
                        }
                    }
                    else
                    {
                        currentGroup.Add(item.Directive);
                    }
                }

                nextChange = SpacingChecker.GetNextModification(
                    requiredOrderByGroups,
                    importsByGroup);
            }

            return(nextChange);
        }