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using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
namespace ScintillaNet
{
[TypeConverterAttribute(typeof(System.ComponentModel.ExpandableObjectConverter))]
public class Indentation : ScintillaHelperBase
{
internal Indentation(Scintilla scintilla) : base(scintilla) { }
internal bool ShouldSerialize()
{
return ShouldSerializeBackspaceUnindents() ||
ShouldSerializeIndentWidth() ||
ShouldSerializeShowGuides() ||
ShouldSerializeTabIndents() ||
ShouldSerializeTabWidth() ||
ShouldSerializeUseTabs();
}
#region TabWidth
public int TabWidth
{
get
{
return NativeScintilla.GetTabWidth();
}
set
{
NativeScintilla.SetTabWidth(value);
}
}
private bool ShouldSerializeTabWidth()
{
return TabWidth != 8;
}
private void ResetTabWidth()
{
TabWidth = 8;
}
#endregion
#region UseTabs
public bool UseTabs
{
get
{
return NativeScintilla.GetUseTabs();
}
set
{
NativeScintilla.SetUseTabs(value);
}
}
private bool ShouldSerializeUseTabs()
{
return !UseTabs;
}
private void ResetUseTabs()
{
UseTabs = true;
}
#endregion
#region IndentWidth
public int IndentWidth
{
get
{
return NativeScintilla.GetIndent();
}
set
{
NativeScintilla.SetIndent(value);
}
}
private bool ShouldSerializeIndentWidth()
{
return IndentWidth != 0;
}
private void ResetIndentWidth()
{
IndentWidth = 0;
}
#endregion
#region TabIndents
public bool TabIndents
{
get
{
return NativeScintilla.GetTabIndents();
}
set
{
NativeScintilla.SetTabIndents(value);
}
}
private bool ShouldSerializeTabIndents()
{
return !TabIndents;
}
private void ResetTabIndents()
{
TabIndents = false;
}
#endregion
#region BackspaceUnindents
public bool BackspaceUnindents
{
get
{
return NativeScintilla.GetBackSpaceUnIndents();
}
set
{
NativeScintilla.SetBackSpaceUnIndents(value);
}
}
private bool ShouldSerializeBackspaceUnindents()
{
return BackspaceUnindents;
}
private void ResetBackspaceUnindents()
{
BackspaceUnindents = false;
}
#endregion
#region ShowGuides
public bool ShowGuides
{
get
{
return NativeScintilla.GetIndentationGuides();
}
set
{
NativeScintilla.SetIndentationGuides(value);
}
}
private bool ShouldSerializeShowGuides()
{
return ShowGuides;
}
private void ResetShowGuides()
{
ShowGuides = false;
}
#endregion
#region Smart indenting support
/// <summary>
/// Enables the Smart Indenter so that On enter, it indents the next line.
/// </summary>
private SmartIndent _smartIndentType = SmartIndent.None;
public SmartIndent SmartIndentType
{
get { return _smartIndentType; }
set
{
_smartIndentType = value;
}
}
private bool ShouldSerializeSmartIndentType()
{
return _smartIndentType != SmartIndent.None;
}
private void ResetSmartIndentType()
{
_smartIndentType = SmartIndent.None;
}
/// <summary>
/// If Smart Indenting is enabled, this delegate will be added to the CharAdded multicast event.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
internal void CheckSmartIndent(char ch)
{
char newline = (Scintilla.EndOfLine.Mode == EndOfLineMode.CR) ? '\r' : '\n';
switch (SmartIndentType)
{
case SmartIndent.None:
return;
case SmartIndent.Simple:
if (ch == newline)
{
Line curLine = Scintilla.Lines.Current;
curLine.Indentation = curLine.Previous.Indentation;
Scintilla.CurrentPos = curLine.IndentPosition;
}
break;
case SmartIndent.CPP:
case SmartIndent.CPP2:
if (ch == newline)
{
Line curLine = Scintilla.Lines.Current;
Line tempLine = curLine;
int previousIndent;
string tempText;
do
{
tempLine = tempLine.Previous;
previousIndent = tempLine.Indentation;
tempText = tempLine.Text.Trim();
if (tempText.Length == 0) previousIndent = -1;
}
while ((tempLine.Number > 1) && (previousIndent < 0));
if (tempText.EndsWith("{"))
{
int bracePos = Scintilla.CurrentPos - 1;
while (bracePos > 0 && Scintilla.CharAt(bracePos) != '{') bracePos--;
if (bracePos > 0 && Scintilla.Styles.GetStyleAt(bracePos) == 10)
previousIndent += TabWidth;
}
curLine.Indentation = previousIndent;
Scintilla.CurrentPos = curLine.IndentPosition;
}
else if (ch == '}')
{
int position = Scintilla.CurrentPos;
Line curLine = Scintilla.Lines.Current;
int previousIndent = curLine.Previous.Indentation;
int match = Scintilla.SafeBraceMatch(position - 1);
if (match != -1)
{
previousIndent = Scintilla.Lines.FromPosition(match).Indentation;
curLine.Indentation = previousIndent;
}
}
break;
}
}
/// <summary>
/// For Custom Smart Indenting, assign a handler to this delegate property.
/// </summary>
public EventHandler<CharAddedEventArgs> SmartIndentCustomAction;
/// <summary>
/// Smart Indenting helper method
/// </summary>
/// <param name="line"></param>
/// <param name="indent"></param>
private void IndentLine(int line, int indent)
{
if (indent < 0)
{
return;
}
int selStart = Scintilla.Selection.Start;
int selEnd = Scintilla.Selection.End;
Line l = Scintilla.Lines[line];
int posBefore = l.IndentPosition;
l.Indentation = indent;
int posAfter = l.IndentPosition;
int posDifference = posAfter - posBefore;
if (posAfter > posBefore)
{
// Move selection on
if (selStart >= posBefore)
{
selStart += posDifference;
}
if (selEnd >= posBefore)
{
selEnd += posDifference;
}
}
else if (posAfter < posBefore)
{
// Move selection back
if (selStart >= posAfter)
{
if (selStart >= posBefore)
selStart += posDifference;
else
selStart = posAfter;
}
if (selEnd >= posAfter)
{
if (selEnd >= posBefore)
selEnd += posDifference;
else
selEnd = posAfter;
}
}
Scintilla.Selection.Start = selStart;
Scintilla.Selection.End = selEnd;
}
#endregion
}
}
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