/// <summary>
/// Checks an import list against the configured ordering and spacing.
/// </summary>
/// <param name="holder">The import list container - either a file, or a namespace
/// declaration block.</param>
/// <param name="highlights">If the import does not meet the configured requirements,
/// we allocate a list containing a highlight describing the problem and return
/// it via this argument. (We allocate the list on demand to avoid allocations
/// in the happy path in which all the import lists are correctly ordered and
/// spaced.)</param>
private void CheckImports(
ICSharpTypeAndNamespaceHolderDeclaration holder, ref List <HighlightingInfo> highlights)
{
List <UsingDirectiveOrSpace> items = ImportReader.ReadImports(holder);
List <UsingDirective> imports;
List <List <UsingDirective> > requiredOrderByGroups;
ImportInspector.FlattenImportsAndDetermineOrderAndSpacing(
_config, items, out imports, out requiredOrderByGroups);
bool orderIsCorrect = true;
if (requiredOrderByGroups != null)
{
Relocation nextChange = ImportInspector.GetNextUsingToMove(requiredOrderByGroups, imports);
if (nextChange != null)
{
orderIsCorrect = false;
AddHighlight(holder, ref highlights, new UsingOrderHighlighting(holder, _config));
}
}
// If (and only if) the order is correct, we go on to check the spacing.
if (orderIsCorrect)
{
SpaceChange nextChange = ImportInspector.GetNextSpacingModification(requiredOrderByGroups, items);
if (nextChange != null)
{
AddHighlight(holder, ref highlights, new UsingSpacingHighlighting(holder, _config));
}
}
}
/// <summary>
/// Fixes the order of the using directives in a given file or namespace block
/// to match the specified configuration.
/// </summary>
/// <param name="holder">The file or namespace block in which to fix the order
/// of using directives (if any are present).</param>
/// <param name="configuration">The configuration determining the correct order.</param>
public static void FixOrder(
ICSharpTypeAndNamespaceHolderDeclaration holder,
OrderUsingsConfiguration configuration)
{
// The reordering proceeds one item at a time, so we just keep reapplying it
// until there's nothing left to do.
// To avoid hanging VS in the event that an error in the logic causes the
// sequence of modifications not to terminate, we ensure we don't try to
// apply more changes than there are using directives.
int tries = 0;
int itemCount = 0;
while (tries == 0 || tries <= itemCount)
{
List <UsingDirectiveOrSpace> items = ImportReader.ReadImports(holder);
List <UsingDirective> imports;
List <List <UsingDirective> > requiredOrderByGroups;
ImportInspector.FlattenImportsAndDetermineOrderAndSpacing(
configuration, items, out imports, out requiredOrderByGroups);
if (requiredOrderByGroups == null)
{
break;
}
itemCount = imports.Count;
Relocation nextChange = ImportInspector.GetNextUsingToMove(requiredOrderByGroups, imports);
if (nextChange != null)
{
IUsingDirective toMove = holder.Imports[nextChange.From];
IUsingDirective before = holder.Imports[nextChange.To];
holder.RemoveImport(toMove);
holder.AddImportBefore(toMove, before);
tries += 1;
}
else
{
break;
}
}
}
/// <summary>
/// Fixes the spacing of the using directives in a given file or namespace block
/// to match the specified configuration. (The directives must already be in
/// the correct order.)
/// </summary>
/// <param name="holder">The file or namespace block in which to fix the spacing
/// of using directives (if any are present).</param>
/// <param name="configuration">The configuration determining the correct spacing.</param>
public static void FixSpacing(
ICSharpTypeAndNamespaceHolderDeclaration holder,
OrderUsingsConfiguration configuration)
{
// The reordering proceeds one item at a time, so we just keep reapplying it
// until there's nothing left to do.
// To avoid hanging VS in the event that an error in the logic causes the
// sequence of modifications not to terminate, we ensure we don't try to
// apply more changes than there are either using directives or blank
// lines in the usings list.
int tries = 0;
int itemCount = 0;
while (tries == 0 || tries <= itemCount)
{
List <UsingDirectiveOrSpace> items = ImportReader.ReadImports(holder);
if (items == null)
{
return;
}
itemCount = items.Count;
List <UsingDirective> imports;
List <List <UsingDirective> > requiredOrderByGroups;
ImportInspector.FlattenImportsAndDetermineOrderAndSpacing(
configuration, items, out imports, out requiredOrderByGroups);
SpaceChange nextChange = ImportInspector.GetNextSpacingModification(requiredOrderByGroups, items);
if (nextChange != null)
{
IUsingDirective usingBeforeSpace = holder.Imports[nextChange.Index - 1];
if (nextChange.ShouldInsert)
{
using (WriteLockCookie.Create())
{
var newLineText = new StringBuffer("\r\n");
LeafElementBase newLine = TreeElementFactory.CreateLeafElement(
CSharpTokenType.NEW_LINE, newLineText, 0, newLineText.Length);
LowLevelModificationUtil.AddChildAfter(usingBeforeSpace, newLine);
}
}
else
{
var syb = usingBeforeSpace.NextSibling;
for (; syb != null && !(syb is IUsingDirective); syb = syb.NextSibling)
{
if (syb.NodeType == CSharpTokenType.NEW_LINE)
{
LowLevelModificationUtil.DeleteChild(syb);
}
}
}
}
else
{
break;
}
tries += 1;
}
}