/// <summary>
/// Sends a win32 message to get the scrollbars' position.
/// </summary>
/// <returns>a POINT structore containing horizontal and vertical scrollbar position.</returns>
private unsafe Win32.POINT GetScrollPos()
{
Win32.POINT res = new Win32.POINT();
IntPtr ptr = new IntPtr(&res);
Win32.SendMessage(Handle, Win32.EM_GETSCROLLPOS, 0, ptr);
return(res);
}
/// <summary>
/// The on text changed overrided. Here we parse the text into RTF for the highlighting.
/// </summary>
/// <param name="e"></param>
protected override void OnTextChanged(EventArgs e)
{
if (mParsing)
{
return;
}
mParsing = true;
Win32.LockWindowUpdate(Handle);
base.OnTextChanged(e);
if (!mIsUndo)
{
mRedoStack.Clear();
mUndoList.Insert(0, mLastInfo);
this.LimitUndo();
mLastInfo = new UndoRedoInfo(Text, GetScrollPos(), SelectionStart);
}
// Save scroll bar an cursor position, changeing the RTF moves the cursor and scrollbars to top positin
Win32.POINT scrollPos = GetScrollPos();
int cursorLoc = SelectionStart;
// Created with an estimate of how big the stringbuilder has to be...
StringBuilder sb = new
StringBuilder((int)(Text.Length * 1.5 + 150));
// Adding RTF header
sb.Append(@"{\rtf1\fbidis\ansi\ansicpg1255\deff0\deflang1037{\fonttbl{");
//Font table creation
int fontCounter = 0;
Hashtable fonts = new Hashtable();
AddFontToTable(sb, Font, ref fontCounter, fonts);
foreach (HighlightDescriptor hd in mHighlightDescriptors)
{
if ((hd.Font != null) && !fonts.ContainsKey(hd.Font.Name))
{
AddFontToTable(sb, hd.Font, ref fontCounter, fonts);
}
}
sb.Append("}\n");
// ColorTable
sb.Append(@"{\colortbl ;");
Hashtable colors = new Hashtable();
int colorCounter = 1;
AddColorToTable(sb, ForeColor, ref colorCounter, colors);
AddColorToTable(sb, BackColor, ref colorCounter, colors);
foreach (HighlightDescriptor hd in mHighlightDescriptors)
{
if (!colors.ContainsKey(hd.Color))
{
AddColorToTable(sb, hd.Color, ref colorCounter, colors);
}
}
// Parsing text
sb.Append("}\n").Append(@"\viewkind4\uc1\pard\ltrpar");
SetDefaultSettings(sb, colors, fonts);
char[] sperators = mSeperators.GetAsCharArray();
// Replacing "\" to "\\" for RTF...
string[] lines = Text.Replace("\\", "\\\\").Replace("{", "\\{").Replace("}", "\\}").Split('\n');
for (int lineCounter = 0; lineCounter < lines.Length; lineCounter++)
{
if (lineCounter != 0)
{
AddNewLine(sb);
}
string line = lines[lineCounter];
string[] tokens = mCaseSesitive ? line.Split(sperators) : line.ToUpper().Split(sperators);
if (tokens.Length == 0)
{
sb.Append(line);
AddNewLine(sb);
continue;
}
int tokenCounter = 0;
for (int i = 0; i < line.Length;)
{
char curChar = line[i];
if (mSeperators.Contains(curChar))
{
sb.Append(curChar);
i++;
}
else
{
string curToken = tokens[tokenCounter++];
bool bAddToken = true;
foreach (HighlightDescriptor hd in mHighlightDescriptors)
{
string compareStr = mCaseSesitive ? hd.Token : hd.Token.ToUpper();
bool match = false;
// Check if the highlight descriptor matches the current toker according to the DescriptoRecognision property.
switch (hd.DescriptorRecognition)
{
case DescriptorRecognition.WholeWord:
if (curToken == compareStr)
{
match = true;
}
break;
case DescriptorRecognition.StartsWith:
if (curToken.StartsWith(compareStr))
{
match = true;
}
break;
case DescriptorRecognition.Contains:
if (curToken.IndexOf(compareStr) != -1)
{
match = true;
}
break;
}
if (!match) // If this token doesn't match chech the next one.
{
continue;
}
// printing this token will be handled by the inner code, don't apply default settings...
bAddToken = false;
// Set colors to current descriptor settings.
SetDescriptorSettings(sb, hd, colors, fonts);
// Print text affected by this descriptor.
switch (hd.DescriptorType)
{
case DescriptorType.Word:
sb.Append(line.Substring(i, curToken.Length));
SetDefaultSettings(sb, colors, fonts);
i += curToken.Length;
break;
case DescriptorType.ToEOL:
sb.Append(line.Remove(0, i));
i = line.Length;
SetDefaultSettings(sb, colors, fonts);
break;
case DescriptorType.ToCloseToken:
while ((line.IndexOf(hd.CloseToken, i) == -1) && (lineCounter < lines.Length))
{
sb.Append(line.Remove(0, i));
lineCounter++;
if (lineCounter < lines.Length)
{
AddNewLine(sb);
line = lines[lineCounter];
i = 0;
}
else
{
i = line.Length;
}
}
if (line.IndexOf(hd.CloseToken, i) != -1)
{
sb.Append(line.Substring(i, line.IndexOf(hd.CloseToken, i) + hd.CloseToken.Length - i));
line = line.Remove(0, line.IndexOf(hd.CloseToken, i) + hd.CloseToken.Length);
tokenCounter = 0;
tokens = mCaseSesitive ? line.Split(sperators) : line.ToUpper().Split(sperators);
SetDefaultSettings(sb, colors, fonts);
i = 0;
}
break;
}
break;
}
if (bAddToken)
{
// Print text with default settings...
sb.Append(line.Substring(i, curToken.Length));
i += curToken.Length;
}
}
}
}
// System.Diagnostics.Debug.WriteLine(sb.ToString());
Rtf = sb.ToString();
// Restore cursor and scrollbars location.
SelectionStart = cursorLoc;
mParsing = false;
SetScrollPos(scrollPos);
Win32.LockWindowUpdate((IntPtr)0);
Invalidate();
if (mAutoCompleteShown)
{
if (mFilterAutoComplete)
{
SetAutoCompleteItems();
SetAutoCompleteSize();
SetAutoCompleteLocation(false);
}
SetBestSelectedAutoCompleteItem();
}
}
/// <summary>
/// Sends a win32 message to set scrollbars position.
/// </summary>
/// <param name="point">a POINT conatining H/Vscrollbar scrollpos.</param>
private unsafe void SetScrollPos(Win32.POINT point)
{
IntPtr ptr = new IntPtr(&point);
Win32.SendMessage(Handle, Win32.EM_SETSCROLLPOS, 0, ptr);
}
public UndoRedoInfo(string text, Win32.POINT scrollPos, int cursorLoc)
{
Text = text;
ScrollPos = scrollPos;
CursorLocation = cursorLoc;
}