private static void ProcessEndElement(XmlReader reader, RTFCurrentState cs, RichTextBox rtb)
{
switch (reader.Name)
{
case "b":
cs.cf.dwEffects &= ~CFE.BOLD;
cs.cf.wWeight = FW.NORMAL;
cs.charFormatChanged = true;
break;
case "i":
cs.cf.dwEffects &= ~CFE.ITALIC;
cs.charFormatChanged = true;
break;
case "u":
cs.cf.dwEffects &= ~CFE.UNDERLINE;
cs.charFormatChanged = true;
break;
case "s":
cs.cf.dwEffects &= ~CFE.STRIKEOUT;
cs.charFormatChanged = true;
break;
case "sup":
cs.cf.dwEffects &= ~CFE.SUPERSCRIPT;
cs.charFormatChanged = true;
break;
case "sub":
cs.cf.dwEffects &= ~CFE.SUBSCRIPT;
cs.charFormatChanged = true;
break;
case "a":
int length = rtb.TextLength - cs.hyperlinkStart;
if (cs.hyperlink != null)
{
rtb.Select(cs.hyperlinkStart, length);
if (cs.hyperlink != rtb.SelectedText)
{
string rtfText = rtb.SelectedRtf;
int idx = rtfText.LastIndexOf('}');
if (idx != -1)
{
string head = rtfText.Substring(0, idx);
string tail = rtfText.Substring(idx);
rtb.SelectedRtf = head + @"\v #" + cs.hyperlink + @"\v0" + tail;
length = rtb.TextLength - cs.hyperlinkStart;
}
}
// reposition to final
rtb.Select(rtb.TextLength + 1, 0);
}
cs.links.Add(new KeyValuePair<int, int>(cs.hyperlinkStart, length));
cs.hyperlinkStart = -1;
break;
case "p":
cs.pf = cs.spf.Pop();
cs.paraFormatChanged = true;
break;
case "li":
cs.pf = cs.spf.Pop();
cs.paraFormatChanged = true;
break;
case "font":
cs.cf = cs.scf.Pop();
cs.charFormatChanged = true;
break;
}
}
private static void ProcessNode(RichTextBox rtb, HandleRef handleRef, XmlReader reader, RTFCurrentState cs)
{
switch (reader.NodeType)
{
case XmlNodeType.Element:
ProcessElement(reader, cs, rtb);
break;
case XmlNodeType.EndElement:
ProcessEndElement(reader, cs, rtb);
break;
case XmlNodeType.Text:
string strData = reader.Value;
bool bNewParagraph = (strData.IndexOf("\r\n", 0) >= 0) || (strData.IndexOf("\n", 0) >= 0);
if (strData.Length > 0)
{
// now, add text to control
int nStartCache = rtb.SelectionStart;
rtb.SelectedText = strData;
rtb.Select(nStartCache, strData.Length);
// apply format
if (cs.paraFormatChanged)
SetParaFormat(handleRef, cs.pf);
if (cs.charFormatChanged)
SetCharFormat(handleRef, cs.cf);
cs.charFormatChanged = false;
cs.paraFormatChanged = false;
// reposition to final
rtb.Select(rtb.TextLength + 1, 0);
// new paragraph requires to reset alignment
if (bNewParagraph)
{
cs.pf.dwMask = PFM.ALIGNMENT | PFM.NUMBERING;
cs.pf.wAlignment = PFA.LEFT;
cs.pf.wNumbering = 0;
cs.paraFormatChanged = true;
}
}
break;
case XmlNodeType.Whitespace:
case XmlNodeType.SignificantWhitespace:
rtb.SelectedText = reader.Value;
break;
case XmlNodeType.XmlDeclaration:
case XmlNodeType.ProcessingInstruction:
break;
case XmlNodeType.Comment:
break;
default:
break;
}
}
private static void ProcessElement(XmlReader reader, RTFCurrentState cs, RichTextBox rtb)
{
switch (reader.Name.ToLower())
{
case "b":
cs.cf.dwMask |= CFM.WEIGHT | CFM.BOLD;
cs.cf.dwEffects |= CFE.BOLD;
cs.cf.wWeight = FW.BOLD;
cs.charFormatChanged = true;
break;
case "i":
cs.cf.dwMask |= CFM.ITALIC;
cs.cf.dwEffects |= CFE.ITALIC;
cs.charFormatChanged = true;
break;
case "u":
cs.cf.dwMask |= CFM.UNDERLINE | CFM.UNDERLINETYPE;
cs.cf.dwEffects |= CFE.UNDERLINE;
cs.cf.bUnderlineType = CFU.UNDERLINE;
cs.charFormatChanged = true;
break;
case "s":
cs.cf.dwMask |= CFM.STRIKEOUT;
cs.cf.dwEffects |= CFE.STRIKEOUT;
cs.charFormatChanged = true;
break;
case "sup":
cs.cf.dwMask |= CFM.SUPERSCRIPT;
cs.cf.dwEffects |= CFE.SUPERSCRIPT;
cs.charFormatChanged = true;
break;
case "sub":
cs.cf.dwMask |= CFM.SUBSCRIPT;
cs.cf.dwEffects |= CFE.SUBSCRIPT;
cs.charFormatChanged = true;
break;
case "a":
cs.hyperlinkStart = rtb.TextLength;
cs.hyperlink = null;
while (reader.MoveToNextAttribute())
{
if (reader.Name.ToLower() == "href")
{
cs.hyperlink = reader.Value;
}
}
reader.MoveToElement();
break;
case "p":
cs.spf.Push(cs.pf);
while (reader.MoveToNextAttribute())
{
if (reader.Name.ToLower() == "align")
{
if (reader.Value == "left")
{
cs.pf.dwMask |= PFM.ALIGNMENT;
cs.pf.wAlignment = PFA.LEFT;
cs.paraFormatChanged = true;
}
else if (reader.Value == "right")
{
cs.pf.dwMask |= PFM.ALIGNMENT;
cs.pf.wAlignment = PFA.RIGHT;
cs.paraFormatChanged = true;
}
else if (reader.Value == "center")
{
cs.pf.dwMask |= PFM.ALIGNMENT;
cs.pf.wAlignment = PFA.CENTER;
cs.paraFormatChanged = true;
}
}
}
reader.MoveToElement();
break;
case "li":
cs.spf.Push(cs.pf);
if (cs.pf.wNumbering != PFN.BULLET)
{
cs.pf.dwMask |= PFM.NUMBERING;
cs.pf.wNumbering = PFN.BULLET;
cs.paraFormatChanged = true;
}
break;
case "font":
cs.scf.Push(cs.cf);
string strFont = cs.cf.szFaceName;
int crFont = cs.cf.crTextColor;
int yHeight = cs.cf.yHeight;
while (reader.MoveToNextAttribute())
{
switch (reader.Name.ToLower())
{
case "face":
cs.cf.dwMask |= CFM.FACE;
strFont = reader.Value;
break;
case "size":
cs.cf.dwMask |= CFM.SIZE;
yHeight = int.Parse(reader.Value);
yHeight *= (20 * 5);
break;
case "color":
cs.cf.dwMask |= CFM.COLOR;
string text = reader.Value;
if (text.StartsWith("#"))
{
string strCr = text.Substring(1);
int nCr = Convert.ToInt32(strCr, 16);
Color color = Color.FromArgb(nCr);
crFont = GetCOLORREF(color);
}
else if (!int.TryParse(text, out crFont))
{
Color color = Color.FromName(text);
crFont = GetCOLORREF(color);
}
break;
}
}
reader.MoveToElement();
cs.cf.szFaceName = strFont;
cs.cf.crTextColor = crFont;
cs.cf.yHeight = yHeight;
cs.cf.dwEffects &= ~CFE.AUTOCOLOR;
cs.charFormatChanged = true;
break;
}
}
public static void SetXHTMLText(this RichTextBox rtb, string xhtmlText)
{
if (EnvUtils.IsMonoRuntime())
{
SetXHTMLTextAsPlainText(rtb, xhtmlText);
return;
}
rtb.Clear();
RTFCurrentState cs = new RTFCurrentState();
var handleRef = new HandleRef(rtb, rtb.Handle);
cs.cf = GetDefaultCharFormat(handleRef); // to apply character formatting
cs.pf = GetDefaultParaFormat(handleRef); // to apply paragraph formatting
IntPtr oldMask = BeginUpdate(handleRef);
SetHideSelectionInternal(handleRef, true);
XmlReaderSettings settings = new XmlReaderSettings();
settings.ConformanceLevel = ConformanceLevel.Fragment;
settings.CheckCharacters = false;
try
{
using (StringReader stringreader = new StringReader(EscapeNonXMLChars(xhtmlText)))
{
XmlReader reader = XmlReader.Create(stringreader, settings);
while (reader.Read())
ProcessNode(rtb, handleRef, reader, cs);
}
}
catch (System.Xml.XmlException ex)
{
Debug.WriteLine(ex.Message);
}
// apply links style
CHARFORMAT ncf = new CHARFORMAT(CFM.LINK, CFE.LINK);
ncf.cbSize = Marshal.SizeOf(ncf);
foreach (var pair in cs.links)
{
rtb.Select(pair.Key, pair.Value);
SetCharFormat(handleRef, ncf);
}
SetHideSelectionInternal(handleRef, false);
// reposition to first
rtb.Select(0, 0);
EndUpdate(handleRef, oldMask);
rtb.Invalidate();
}
