/// <summary>
/// Performs the formatting command on the currectly selected range of text.
/// </summary>
/// <param name="command">The <see cref="AppKit.TextKit.Formatter.LanguageFormatCommand"/> to apply.</param>
public void PerformFormattingCommand(LanguageFormatCommand command)
{
NSRange range = SelectedRange;
// Apply to start of line?
if (command.Postfix == "")
{
// Yes, find start
range = Formatter.FindLineBoundries(TextStorage.Value, SelectedRange);
}
// Yes, get selected text
var location = range.Location;
var line = TextStorage.Value.Substring((int)range.Location, (int)range.Length);
// Apply command
var output = command.Prefix;
output += line;
output += command.Postfix;
TextStorage.BeginEditing();
Replace(range, output);
TextStorage.EndEditing();
Formatter.HighlightSyntaxRegion(TextStorage.Value, range);
}
/// <summary>
/// Outdents the currently selected text.
/// </summary>
public void OutdentText()
{
// Grab range
var range = Formatter.FindLineBoundries(TextStorage.Value, SelectedRange);
var line = TextStorage.Value.Substring((int)range.Location, (int)range.Length);
// Decrease tab indent
var output = DecreaseTabIndent(line);
// reformat section
TextStorage.BeginEditing();
Replace(range, output);
TextStorage.EndEditing();
SelectedRange = new NSRange(range.Location, output.Length);
Formatter.HighlightSyntaxRegion(TextStorage.Value, SelectedRange);
}
/// <summary>
/// Process any drag operations initialized by the user to this <see cref="AppKit.TextKit.Formatter.SourceTextView"/>.
/// If one or more files have dragged in, the contents of those files will be copied into the document at the
/// current cursor location.
/// </summary>
/// <returns><c>true</c>, if drag operation was performed, <c>false</c> otherwise.</returns>
/// <param name="sender">The caller that initiated the drag operation.</param>
/// <remarks>
/// See Apple's drag and drop docs for more details (https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/DragandDrop/DragandDrop.html)
/// </remarks>
public override bool PerformDragOperation(NSDraggingInfo sender)
{
// Attempt to read filenames from pasteboard
var plist = (NSArray)sender.DraggingPasteboard.GetPropertyListForType(NSPasteboard.NSFilenamesType);
// Was a list of files returned from Finder?
if (plist != null)
{
// Yes, process list
for (nuint n = 0; n < plist.Count; ++n)
{
// Get the current file
var path = plist.GetItem <NSString> (n);
var url = NSUrl.FromString(path);
var contents = File.ReadAllText(path);
// Insert contents at cursor
NSRange range = SelectedRange;
TextStorage.BeginEditing();
Replace(range, contents);
TextStorage.EndEditing();
// Expand range to fully encompass new content and
// reformat
range = new NSRange(range.Location, contents.Length);
range = Formatter.FindLineBoundries(TextStorage.Value, range);
Formatter.HighlightSyntaxRegion(TextStorage.Value, range);
}
// Inform caller of success
return(true);
}
else
{
// No, allow base class to handle
return(base.PerformDragOperation(sender));
}
}
/// <summary>
/// Look for special keys being pressed and does specific processing based on
/// the key.
/// </summary>
/// <param name="theEvent">The event.</param>
public override void KeyDown(NSEvent theEvent)
{
NSRange range = new NSRange(0, 0);
string line = "";
int indentLevel = 0;
bool consumeKeystroke = false;
// Avoid processing if no Formatter has been attached
if (Formatter == null)
{
return;
}
// Trap all errors
try {
// Get the code of current character
var c = theEvent.Characters [0];
var charCode = (int)theEvent.Characters [0];
// Preprocess based on character code
switch (charCode)
{
case EnterKey:
// Get the tab indent level
range = Formatter.FindLineBoundries(TextStorage.Value, SelectedRange);
line = TextStorage.Value.Substring((int)range.Location, (int)range.Length);
indentLevel = CalculateIndentLevel(line);
break;
case TabKey:
// Is a range selected?
if (SelectedRange.Length > 0)
{
// Increase tab indent over the entire selection
IndentText();
consumeKeystroke = true;
}
break;
case ShiftTabKey:
// Is a range selected?
if (SelectedRange.Length > 0)
{
// Increase tab indent over the entire selection
OutdentText();
consumeKeystroke = true;
}
break;
default:
// Are we completing closures
if (CompleteClosures)
{
if (WrapClosures && SelectedRange.Length > 0)
{
// Yes, see if we are starting a closure
foreach (LanguageClosure closure in Formatter.Language.Closures)
{
// Found?
if (closure.StartingCharacter == c)
{
// Yes, get selected text
var location = SelectedRange.Location;
line = TextStorage.Value.Substring((int)SelectedRange.Location, (int)SelectedRange.Length);
var output = "";
output += closure.StartingCharacter;
output += line;
output += closure.EndingCharacter;
TextStorage.BeginEditing();
Replace(SelectedRange, output);
TextStorage.EndEditing();
if (SelectAfterWrap)
{
SelectedRange = new NSRange(location, output.Length);
}
consumeKeystroke = true;
Formatter.HighlightSyntaxRegion(TextStorage.Value, SelectedRange);
}
}
}
else
{
// Yes, see if we are in a language defined closure
foreach (LanguageClosure closure in Formatter.Language.Closures)
{
// Found?
if (closure.StartingCharacter == c)
{
// Is this a valid location for a completion?
if (Formatter.TrailingCharacterIsWhitespaceOrTerminator(TextStorage.Value, SelectedRange))
{
// Yes, complete closure
consumeKeystroke = true;
var output = "";
output += closure.StartingCharacter;
output += closure.EndingCharacter;
TextStorage.BeginEditing();
InsertText(new NSString(output));
TextStorage.EndEditing();
SelectedRange = new NSRange(SelectedRange.Location - 1, 0);
}
}
}
}
}
break;
}
// Call base to handle event
if (!consumeKeystroke)
{
base.KeyDown(theEvent);
}
// Post process based on character code
switch (charCode)
{
case EnterKey:
// Tab indent the new line to the same level
if (indentLevel > 0)
{
var indent = TabIndent(indentLevel);
TextStorage.BeginEditing();
InsertText(new NSString(indent));
TextStorage.EndEditing();
}
break;
}
} catch {
// Call base to process on any error
base.KeyDown(theEvent);
}
//Console.WriteLine ("Key: {0}", (int)theEvent.Characters[0]);
}