private IDisposable EditTextBuffer()
{
if (_readOnlyRegion != null)
{
using (var edit = _historyTextBuffer.CreateReadOnlyRegionEdit()) {
edit.RemoveReadOnlyRegion(_readOnlyRegion);
_readOnlyRegion = null;
edit.Apply();
}
}
HistoryChanging?.Invoke(this, new EventArgs());
return(_textBufferIsEditable.Increment());
}
/// <summary>
/// Expands the read only region to the end of the current buffer
/// </summary>
private void ExtendReadOnlyRegion()
{
if (!textBuffer.EditInProgress)
{
if (readOnlyRegion != null)
{
var readOnlyRemove = textBuffer.CreateReadOnlyRegionEdit();
readOnlyRemove.RemoveReadOnlyRegion(readOnlyRegion);
readOnlyRemove.Apply();
}
var readOnlyEdit = textBuffer.CreateReadOnlyRegionEdit();
readOnlyRegion = readOnlyEdit.CreateReadOnlyRegion(new Span(0, textBuffer.CurrentSnapshot.Length));
readOnlyEdit.Apply();
}
}
public OpenSourceGeneratedFile(SourceGeneratedFileManager fileManager, ITextBuffer textBuffer, Workspace workspace, ProjectId projectId, string generatorTypeName, string generatorAssemblyName, string generatedSourceHintName, IThreadingContext threadingContext)
: base(threadingContext, assertIsForeground: true)
{
_fileManager = fileManager;
_textBuffer = textBuffer;
_workspace = workspace;
_projectId = projectId;
_generatorTypeName = generatorTypeName;
_generatorAssemblyName = generatorAssemblyName;
_generatedSourceHintName = generatedSourceHintName;
// We'll create a read-only region for the file, but it'll be a dynamic region we can temporarily suspend
// while we're doing edits.
using (var readOnlyRegionEdit = _textBuffer.CreateReadOnlyRegionEdit())
{
_readOnlyRegion = readOnlyRegionEdit.CreateDynamicReadOnlyRegion(
_textBuffer.CurrentSnapshot.GetFullSpan(),
SpanTrackingMode.EdgeInclusive,
EdgeInsertionMode.Deny,
callback: _ => !_updatingBuffer);
readOnlyRegionEdit.Apply();
}
_workspace.WorkspaceChanged += OnWorkspaceChanged;
_batchingWorkQueue = new AsyncBatchingDelay(
TimeSpan.FromSeconds(1),
UpdateBufferContentsAsync,
asyncListener: _fileManager._listener,
_cancellationTokenSource.Token);
}
private void SetReadOnlyRegionType(ReadOnlyRegionType value)
{
ITextBuffer buffer = WpfTextView.TextBuffer;
ITextSnapshot snapshot = buffer.CurrentSnapshot;
using (IReadOnlyRegionEdit edit = buffer.CreateReadOnlyRegionEdit()) {
edit.ClearReadOnlyRegion(ref _readOnlyRegionBegin);
edit.ClearReadOnlyRegion(ref _readOnlyRegionBody);
switch (value)
{
case ReadOnlyRegionType.BeginAndBody:
if (snapshot.Length > 0)
{
_readOnlyRegionBegin = edit.CreateReadOnlyRegion(new Span(0, 0), SpanTrackingMode.EdgeExclusive, EdgeInsertionMode.Deny);
_readOnlyRegionBody = edit.CreateReadOnlyRegion(new Span(0, snapshot.Length));
}
break;
case ReadOnlyRegionType.All:
_readOnlyRegionBody = edit.CreateReadOnlyRegion(new Span(0, snapshot.Length), SpanTrackingMode.EdgeExclusive, EdgeInsertionMode.Deny);
break;
}
edit.Apply();
}
}
public void Dispose()
{
using (var readOnlyRegionEdit = _textBuffer.CreateReadOnlyRegionEdit())
{
readOnlyRegionEdit.RemoveReadOnlyRegion(_readOnlyRegion);
readOnlyRegionEdit.Apply();
}
_workspace.WorkspaceChanged -= OnWorkspaceChanged;
// Cancel any remaining asynchronous work we may have had to update this file
_cancellationTokenSource.Cancel();
}
/// <summary>
/// Removes read-only region from buffer.
/// </summary>
public void RemoveProtection(ITextBuffer buffer, IReadOnlyRegion[] regions)
{
if (regions[0] != null)
{
Debug.Assert(regions[1] != null);
foreach (var region in regions)
{
using (var readonlyEdit = buffer.CreateReadOnlyRegionEdit())
{
readonlyEdit.RemoveReadOnlyRegion(region);
readonlyEdit.Apply();
}
}
}
}
/// <summary>
/// Marks the entire buffer as read-only.
/// </summary>
public void ApplyProtection(ITextBuffer buffer, IReadOnlyRegion[] regions, bool allowAppend = false)
{
using (var readonlyEdit = buffer.CreateReadOnlyRegionEdit())
{
int end = buffer.CurrentSnapshot.Length;
Span span = new Span(0, end);
var region0 = allowAppend ?
readonlyEdit.CreateReadOnlyRegion(span, SpanTrackingMode.EdgeExclusive, EdgeInsertionMode.Allow) :
readonlyEdit.CreateReadOnlyRegion(span, SpanTrackingMode.EdgeExclusive, EdgeInsertionMode.Deny);
// Create a second read-only region to prevent insert at start of buffer.
var region1 = (end > 0) ? readonlyEdit.CreateReadOnlyRegion(new Span(0, 0), SpanTrackingMode.EdgeExclusive, EdgeInsertionMode.Deny) : null;
readonlyEdit.Apply();
if (regions != null)
{
regions[0] = region0;
regions[1] = region1;
}
}
}
/// <summary>
/// Removes read-only region from buffer.
/// </summary>
public void RemoveProtection(ITextBuffer buffer, IReadOnlyRegion[] regions)
{
if (regions[0] != null)
{
Debug.Assert(regions[1] != null);
foreach (var region in regions)
{
using (var readonlyEdit = buffer.CreateReadOnlyRegionEdit())
{
readonlyEdit.RemoveReadOnlyRegion(region);
readonlyEdit.Apply();
}
}
}
}
/// <summary>
/// Marks the entire buffer as read-only.
/// </summary>
public void ApplyProtection(ITextBuffer buffer, IReadOnlyRegion[] regions, bool allowAppend = false)
{
using (var readonlyEdit = buffer.CreateReadOnlyRegionEdit())
{
int end = buffer.CurrentSnapshot.Length;
Span span = new Span(0, end);
var region0 = allowAppend ?
readonlyEdit.CreateReadOnlyRegion(span, SpanTrackingMode.EdgeExclusive, EdgeInsertionMode.Allow) :
readonlyEdit.CreateReadOnlyRegion(span, SpanTrackingMode.EdgeExclusive, EdgeInsertionMode.Deny);
// Create a second read-only region to prevent insert at start of buffer.
var region1 = (end > 0) ? readonlyEdit.CreateReadOnlyRegion(new Span(0, 0), SpanTrackingMode.EdgeExclusive, EdgeInsertionMode.Deny) : null;
readonlyEdit.Apply();
if (regions != null)
{
regions[0] = region0;
regions[1] = region1;
}
}
}
