/// <summary>
/// Executes the emacs command
/// </summary>
/// <param name="view"></param>
/// <param name="metadata"></param>
public void Execute(ITextView view, IEmacsCommandMetadata metadata, bool evaluateUniversalArgument = true)
{
using (BufferMonitor bufferMonitor = BufferMonitor.Create(view.TextBuffer))
{
try
{
EmacsCommand command = CreateCommand(metadata);
EmacsCommand inverseCommand = null;
IEmacsCommandMetadata inverseCommandMetadata = null;
var context = new EmacsCommandContext(
this, this.TextStructureNavigatorSelectorService,
this.EditorOperationsFactoryService.GetEditorOperations(view),
view, CommandRouterProvider.GetCommandRouter(view));
if (command != null)
{
var history = this.TextUndoHistoryRegistry.GetHistory(context.TextBuffer);
using (var transaction = CreateTransaction(metadata, history))
{
var repeatCount = 1;
bool shouldExecuteInverse = false;
if (evaluateUniversalArgument)
{
// Check if we should execute the inverse logic of the command by checking if the universal argument is lower than 0
shouldExecuteInverse = GetUniversalArgumentOrDefault() < 0;
if (shouldExecuteInverse)
{
// Search the inverse command using the metadata
inverseCommandMetadata = GetCommandMetadata(metadata.InverseCommand);
inverseCommand = CreateCommand(inverseCommandMetadata);
}
// If the command specifies that can be repeated use the universal argument as the counter, otherwise execute the command only once.
if (metadata.CanBeRepeated)
{
repeatCount = Math.Abs(GetUniversalArgumentOrDefault(1));
}
}
for (; repeatCount > 0; repeatCount--)
{
if (shouldExecuteInverse)
{
// Execute the inverse logic
if (inverseCommand != null)
{
inverseCommand.Execute(context);
}
else
{
command.ExecuteInverse(context);
}
}
else
{
// Execute the normal logic
command.Execute(context);
}
}
// TODO: Check command error and rollback the transaction
if (transaction != null)
{
transaction.Complete();
}
// If the command executed was a kill command, then we want to append the text that was cut
// to any currently text cut for the view.
// If the command is not a kill command and we have had some cut commands executed previously
// that accumulated deleted text, then we want to put the data on the clipboard and reset
// the accumulated text.
if (metadata.IsKillCommand)
{
view.AppendKillString(bufferMonitor.BufferChanges);
}
else
{
view.FlushKillSring(this.ClipboardRing);
}
this.LastExecutedCommand = shouldExecuteInverse ? inverseCommandMetadata : metadata;
}
}
}
catch (NoOperationException)
{
// Do nothing
}
}
}
public void Execute(ITextView view, IEmacsCommandMetadata metadata, bool evaluateUniversalArgument = true)
{
try
{
changes = new StringBuilder();
view.TextBuffer.Changed += OnTextBufferChanged;
EmacsCommand command = CreateCommand(metadata);
EmacsCommand emacsCommand = null;
IEmacsCommandMetadata metadata1 = null;
var context = new EmacsCommandContext(this, TextStructureNavigatorSelectorService,
EditorOperationsFactoryService.GetEditorOperations(view), view,
CommandRouterProvider.GetCommandRouter(view));
if (ClipboardRing.Count == 0 || ClipboardRing.Last() != Clipboard.GetText())
{
ClipboardRing.Add(Clipboard.GetText());
}
if (command == null)
{
return;
}
ITextUndoHistory history = TextUndoHistoryRegistry.GetHistory(context.TextBuffer);
using (ITextUndoTransaction transaction = CreateTransaction(metadata, history))
{
int num = 1;
bool flag = false;
if (evaluateUniversalArgument)
{
flag = GetUniversalArgumentOrDefault(0) < 0;
if (flag)
{
metadata1 = GetCommandMetadata(metadata.InverseCommand);
emacsCommand = CreateCommand(metadata1);
}
if (metadata.CanBeRepeated)
{
num = Math.Abs(GetUniversalArgumentOrDefault(1));
}
}
for (; num > 0; --num)
{
if (flag)
{
if (emacsCommand != null)
{
emacsCommand.Execute(context);
}
else
{
command.ExecuteInverse(context);
}
}
else
{
command.Execute(context);
}
}
if (transaction != null)
{
transaction.Complete();
}
if (context.Clipboard.Length > 0)
{
ClipboardRing.Add(context.Clipboard.ToString());
Clipboard.SetText(context.Clipboard.ToString());
}
else if (changes.Length > 0 && metadata.CopyDeletedTextToTheClipboard)
{
ClipboardRing.Add(changes.ToString());
Clipboard.SetText(changes.ToString());
}
LastExecutedCommand = flag ? metadata1 : metadata;
}
}
catch (NoOperationException ex)
{
}
finally
{
view.TextBuffer.Changed -= OnTextBufferChanged;
}
}
