|
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.ComponentModel;
namespace ScintillaNet
{
[TypeConverterAttribute(typeof(System.ComponentModel.ExpandableObjectConverter))]
public class DocumentNavigation : ScintillaHelperBase
{
bool _supressNext = false;
private Timer t = null;
internal DocumentNavigation(Scintilla scintilla) : base(scintilla)
{
t = new Timer();
t.Interval = _navigationPointTimeout;
t.Tick += new EventHandler(t_Tick);
scintilla.SelectionChanged += new EventHandler(scintilla_SelectionChanged);
}
internal bool ShouldSerialize()
{
return ShouldSerializeIsEnabled() || ShouldSerializeMaxHistorySize();
}
public void Reset()
{
_backwardStack.Clear();
_forewardStack.Clear();
ResetIsEnabled();
ResetMaxHistorySize();
}
private void t_Tick(object sender, EventArgs e)
{
t.Enabled = false;
int pos = NativeScintilla.GetCurrentPos();
if ((_forewardStack.Count == 0 || _forewardStack.Current.Start != pos) && (_backwardStack.Count == 0 || _backwardStack.Current.Start != pos))
_backwardStack.Push(newRange(pos));
}
private void scintilla_SelectionChanged(object sender, EventArgs e)
{
if (!_isEnabled)
return;
if (!_supressNext)
{
t.Enabled = false;
t.Enabled = true;
}
else
{
_supressNext = false;
}
}
#region IsEnabled
private bool _isEnabled = true;
public bool IsEnabled
{
get
{
return _isEnabled;
}
set
{
_isEnabled = value;
}
}
private bool ShouldSerializeIsEnabled()
{
return !_isEnabled;
}
private void ResetIsEnabled()
{
_isEnabled = true;
}
#endregion
#region MaxHistorySize
private int _maxHistorySize = 50;
public int MaxHistorySize
{
get
{
return _maxHistorySize;
}
set
{
_maxHistorySize = value;
_backwardStack.MaxCount = value;
_forewardStack.MaxCount = value;
}
}
private bool ShouldSerializeMaxHistorySize()
{
return _maxHistorySize != 50;
}
private void ResetMaxHistorySize()
{
_maxHistorySize = 50;
}
#endregion
#region BackwardStack
public FakeStack _backwardStack = new FakeStack();
[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public FakeStack BackwardStack
{
get
{
return _backwardStack;
}
set
{
_backwardStack = value;
}
}
#endregion
#region ForewardStack
public FakeStack _forewardStack = new FakeStack();
[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public FakeStack ForewardStack
{
get
{
return _forewardStack;
}
set
{
_forewardStack = value;
}
}
#endregion
#region NavigationPointTimeout
private int _navigationPointTimeout = 200;
public int NavigationPointTimeout
{
get
{
return _navigationPointTimeout;
}
set
{
_navigationPointTimeout = value;
}
}
private bool ShouldSerializeNavigationPointTimeout()
{
return _navigationPointTimeout != 200;
}
private void ResetNavigationPointTimeout()
{
_navigationPointTimeout = 200;
}
#endregion
public void NavigateBackward()
{
if (_backwardStack.Count == 0)
return;
int currentPos = Scintilla.Caret.Position;
if (currentPos == _backwardStack.Current.Start && _backwardStack.Count == 1)
return;
int pos = _backwardStack.Pop().Start;
if (pos != currentPos)
{
_forewardStack.Push(newRange(currentPos));
Scintilla.Caret.Goto(pos);
}
else
{
_forewardStack.Push(newRange(pos));
Scintilla.Caret.Goto(_backwardStack.Current.Start);
}
_supressNext = true;
}
public void NavigateForward()
{
if (!CanNavigateForward)
return;
int pos = _forewardStack.Pop().Start;
_backwardStack.Push(newRange(pos));
Scintilla.Caret.Goto(pos);
_supressNext = true;
}
[Browsable(false)]
public bool CanNavigateBackward
{
get
{
if (_backwardStack.Count == 0 || (NativeScintilla.GetCurrentPos() == _backwardStack.Current.Start && _backwardStack.Count == 1))
return false;
return true;
}
}
[Browsable(false)]
public bool CanNavigateForward
{
get
{
return _forewardStack.Count > 0;
}
}
private NavigationPont newRange(int pos)
{
NavigationPont mr = new NavigationPont(pos, Scintilla);
Scintilla.ManagedRanges.Add(mr);
return mr;
}
public class FakeStack : List<NavigationPont>
{
private int _maxCount = 50;
public int MaxCount
{
get
{
return _maxCount;
}
set
{
_maxCount = value;
}
}
public NavigationPont Pop()
{
NavigationPont ret = this[Count - 1];
RemoveAt(Count - 1);
return ret;
}
public void Push(NavigationPont value)
{
Add(value);
if (Count > MaxCount)
RemoveAt(0);
}
public NavigationPont Current
{
get
{
return this[Count - 1];
}
}
}
public class NavigationPont : ManagedRange
{
/// <summary>
/// Initializes a new instance of the NavigationPont class.
/// </summary>
public NavigationPont(int pos, Scintilla scintilla) : base(pos, pos, scintilla)
{
}
public override void Dispose()
{
Scintilla.DocumentNavigation.ForewardStack.Remove(this);
Scintilla.DocumentNavigation.BackwardStack.Remove(this);
base.Dispose();
}
}
}
}
|
By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.
If a file you wish to view isn't highlighted, and is a text file (not binary), please
let us know and we'll add colourisation support for it.
This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.
A list of licenses authors might use can be found here
This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.