private void CreateHyperlinkClickablePart(RichTextPart richtextpart, Point location, int widthRichTextPart, int heightLineFontsize)
{
HyperlinkClickablePart hyperlinkClickablepart = new HyperlinkClickablePart();
hyperlinkClickablepart.location = location;
hyperlinkClickablepart.width = widthRichTextPart;
hyperlinkClickablepart.height = heightLineFontsize;
hyperlinkClickablepart.richtextpart = richtextpart;
this.hyperlinkclickablepart.Add(hyperlinkClickablepart);
}
private void btnAddRichtext_Click(object sender, EventArgs e)
{
SolidBrush textcolor = new SolidBrush(this.pnlSelectTextColor.BackColor);
RichTextPart richtextpartFS12 = new RichTextPart(this.tbNewText.Text, "arial", 12, textcolor, (FontStyle)this.getTextStylesValue());
if (this.chxNewLine.Checked)
{
richtextpartFS12.AppendNewLine = true;
}
if (this.chxHyperlink.Checked)
{
richtextpartFS12.Href = this.tbHyperlink.Text;
}
this.markupRichtextControl.Append(richtextpartFS12);
this.Refresh();
}
protected override void OnPaint(PaintEventArgs paintEvtArgs)
{
int widthWithoutMargin = this.Width - this.Margin.Horizontal;
Point location = new Point(0, 0);
for (int i = 0; i < this.richtextparts.Count; ++i)
{
RichTextPart richTextPart = this.richtextparts[i];
if (richTextPart.IsLine)
{
Point linestart = location;
Point lineend = location;
linestart.X += MARGIN_LINE_LEFT;
linestart.Y += MARGIN_LINE_TOP;
lineend.X += this.Width - MARGIN_LINE_RIGHT;
lineend.Y += MARGIN_LINE_TOP;
richTextPart.DrawLine(paintEvtArgs, linestart, lineend);
location.Y += LINE_HEIGHT;
continue;
}
if (richTextPart.PrependBullit)
{
richTextPart.Text = "• " + richTextPart.Text;
}
if (richTextPart.Text.Length == 0)
{
continue;
}
SizeF textsize = richTextPart.GetSizeText(paintEvtArgs);
int heightLineFontsize = Convert.ToInt32(textsize.Height);
int widthRichTextPart = Convert.ToInt32(textsize.Width);
// Check if richTextPart needs to be an extra line/multiple line(s).
if (location.X + widthRichTextPart >= widthWithoutMargin)
{
int posstartpartofrichtextpart = 0;
int restTextLength = richTextPart.Text.Length - posstartpartofrichtextpart;
int widthpartoftextpart = 0;
int lastspacerichtextpart = 0;
int lastdotrichtextpart = 0;
// Check foreach characters where to split in this richtext part
for (int n = 0; n < richTextPart.Text.Length; ++n)
{
if (richTextPart.Text[n] == ' ')
{
lastspacerichtextpart = n;
}
else if (richTextPart.Text[n] == '.')
{
lastdotrichtextpart = n;
}
int posstartwrap = n;
if (this.wordwrapmodus == WordWrapMode.OnCharacter ||
lastspacerichtextpart == 0 && this.wordwrapmodus == WordWrapMode.OnWord)
{
posstartwrap = n;
}
else if (this.wordwrapmodus == WordWrapMode.OnWord ||
lastdotrichtextpart == 0 && this.wordwrapmodus == WordWrapMode.OnSentence)
{
posstartwrap = lastspacerichtextpart;
}
else if (this.wordwrapmodus == WordWrapMode.OnSentence)
{
posstartwrap = lastdotrichtextpart;
}
int textlengthpartofrichtextpart = posstartwrap - posstartpartofrichtextpart;
if (textlengthpartofrichtextpart == 0)
{
continue;
}
widthpartoftextpart = richTextPart.GetWidthTextPart(paintEvtArgs, posstartpartofrichtextpart, textlengthpartofrichtextpart);
int widthcharpartoftextpart = richTextPart.GetWidthTextPart(paintEvtArgs, posstartpartofrichtextpart, n - posstartpartofrichtextpart);
int charlocx = location.X + widthcharpartoftextpart;
if (charlocx >= widthWithoutMargin)
{
// A new line in control is needed for part of richtextpart.
richTextPart.DrawPart(paintEvtArgs, location, posstartpartofrichtextpart, textlengthpartofrichtextpart);
if (!String.IsNullOrEmpty(richTextPart.Href))
{
this.CreateHyperlinkClickablePart(richTextPart, location, widthpartoftextpart, heightLineFontsize);
}
// Update location position for next subpart of the richtextpart.
location.X = 0;
location.Y += heightLineFontsize;
// Update start position character and textlength for spliting next subpart of the richtextpart over multiple lines.
posstartpartofrichtextpart = posstartwrap;
restTextLength = richTextPart.Text.Length - posstartpartofrichtextpart;
widthRichTextPart = richTextPart.GetWidthTextPart(paintEvtArgs, posstartpartofrichtextpart, restTextLength);
}
}
// Draw rest of characters that still fit on one a line.
richTextPart.DrawPart(paintEvtArgs, location, posstartpartofrichtextpart, restTextLength);
if (!String.IsNullOrEmpty(richTextPart.Href))
{
widthpartoftextpart = richTextPart.GetWidthTextPart(paintEvtArgs, posstartpartofrichtextpart, restTextLength);
this.CreateHyperlinkClickablePart(richTextPart, location, widthpartoftextpart, heightLineFontsize);
}
}
else
{
if (!String.IsNullOrEmpty(richTextPart.Href))
{
this.CreateHyperlinkClickablePart(richTextPart, location, widthRichTextPart, heightLineFontsize);
}
richTextPart.Draw(paintEvtArgs, location);
}
if (richTextPart.PrependBullit)
{
richTextPart.Text = richTextPart.Text.Substring(2);
}
location = this.UpdateLocationNewRichTextPart(widthRichTextPart, heightLineFontsize, location, widthWithoutMargin);
if (richTextPart.AppendNewLine)
{
location.Y += heightLineFontsize;
location.X = 0;
}
}
}
/// <summary>
/// Add a new part of rich text to this control.
/// </summary>
/// <param name="newRichTextPart"></param>
public void Append(RichTextPart newRichTextPart)
{
this.richtextparts.Add(newRichTextPart);
}
/// <summary>
/// Parse the markup to RichTextParts and add them to the markuptextcontrol.
/// </summary>
/// <param name="markup"></param>
public void ParseMarkup(string markup)
{
MarkupTokenizer tokonizer = new MarkupTokenizer(markup);
tokonizer.FindTokens();
MarkupToken[] markuptokens = tokonizer.GetTokens();
SolidBrush solidbrushTextcolorDefault = new SolidBrush(Color.Black);
RichTextPart richtextpart = null;
bool previous_markuptokon_hyperlinktext = false;
for (int i = 0; i < markuptokens.Length; ++i)
{
if (markuptokens[i].IsLine)
{
richtextpart = new RichTextPart(Pens.Black);
this.markuptextcontrol.Append(richtextpart);
}
else
{
switch (markuptokens[i].CharLeft)
{
case '#':
// head
int headlevel = markuptokens[i].Level;
richtextpart = new RichTextPart(markuptokens[i].Text,
this.fontfamily,
this.headsfontsizes[headlevel],
solidbrushTextcolorDefault,
FontStyle.Bold);
richtextpart.AppendNewLine = true;
this.markuptextcontrol.Append(richtextpart);
previous_markuptokon_hyperlinktext = false;
break;
case '-':
// list
richtextpart = new RichTextPart(markuptokens[i].Text,
this.fontfamily,
this.fontsizedefault,
solidbrushTextcolorDefault,
FontStyle.Regular);
richtextpart.PrependBullit = true;
richtextpart.AppendNewLine = true;
this.markuptextcontrol.Append(richtextpart);
previous_markuptokon_hyperlinktext = false;
break;
case '*':
case '_':
// emphasis
int emphasislevel = markuptokens[i].Level;
int emphasisfontstyle = (int)FontStyle.Italic;
if (emphasislevel >= 1)
{
emphasisfontstyle = (int)FontStyle.Bold;
}
if (emphasislevel >= 2)
{
emphasisfontstyle += (int)FontStyle.Italic;
}
richtextpart = new RichTextPart(markuptokens[i].Text,
this.fontfamily,
this.fontsizedefault,
solidbrushTextcolorDefault,
(FontStyle)emphasisfontstyle);
this.markuptextcontrol.Append(richtextpart);
previous_markuptokon_hyperlinktext = false;
break;
case '~':
// strikethrough
richtextpart = new RichTextPart(markuptokens[i].Text,
this.fontfamily,
this.fontsizedefault,
solidbrushTextcolorDefault,
FontStyle.Strikeout);
this.markuptextcontrol.Append(richtextpart);
previous_markuptokon_hyperlinktext = false;
break;
case '[':
// hyperlink text
previous_markuptokon_hyperlinktext = true;
break;
case '(':
// hyperlink url
if (previous_markuptokon_hyperlinktext && i > 0)
{
FontStyle fontsylehyperlink = FontStyle.Underline;
SolidBrush solidbrushHyperlink = new SolidBrush(Color.Blue);
richtextpart = new RichTextPart(markuptokens[i - 1].Text,
this.fontfamily,
this.fontsizedefault,
solidbrushHyperlink,
fontsylehyperlink);
richtextpart.Href = markuptokens[i].Text;
this.markuptextcontrol.Append(richtextpart);
}
previous_markuptokon_hyperlinktext = false;
break;
case '`':
// TODO: literally and code highlighting
previous_markuptokon_hyperlinktext = false;
break;
default:
if (markuptokens[i].Nomarkup)
{
richtextpart = new RichTextPart(markuptokens[i].Text,
this.fontfamily,
this.fontsizedefault,
solidbrushTextcolorDefault,
FontStyle.Regular);
richtextpart.AppendNewLine = markuptokens[i].TextAppendNewLine;
this.markuptextcontrol.Append(richtextpart);
}
break;
}
}
}
this.markuptextcontrol.Refresh();
}
