private Pango.Layout CreateParagraphLayout(Gtk.PrintContext context,
Gtk.TextIter p_start,
Gtk.TextIter p_end,
out int indentation)
{
Pango.Layout layout = context.CreatePangoLayout();
layout.FontDescription = Window.Editor.Style.FontDesc;
int start_index = p_start.LineIndex;
indentation = 0;
double dpiX = context.DpiX;
using (Pango.AttrList attr_list = new Pango.AttrList()) {
Gtk.TextIter segm_start = p_start;
Gtk.TextIter segm_end;
while (segm_start.Compare(p_end) < 0)
{
segm_end = segm_start;
IEnumerable <Pango.Attribute> attrs =
GetParagraphAttributes(
layout, dpiX, out indentation,
ref segm_end, p_end);
uint si = (uint)(segm_start.LineIndex - start_index);
uint ei = (uint)(segm_end.LineIndex - start_index);
foreach (Pango.Attribute a in attrs)
{
a.StartIndex = si;
a.EndIndex = ei;
attr_list.Insert(a);
}
segm_start = segm_end;
}
layout.Attributes = attr_list;
}
DepthNoteTag depth = Buffer.FindDepthTag(p_start);
if (depth != null)
{
indentation += ((int)(dpiX / 3)) * depth.Depth;
}
layout.Width = Pango.Units.FromPixels((int)context.Width -
margin_left - margin_right - indentation);
layout.Wrap = Pango.WrapMode.WordChar;
layout.SetText(Buffer.GetSlice(p_start, p_end, false));
return(layout);
}
private IEnumerable <Pango.Attribute> GetParagraphAttributes(
Pango.Layout layout, double dpiX, out int indentation,
ref Gtk.TextIter position, Gtk.TextIter limit)
{
IList <Pango.Attribute> attributes = new List <Pango.Attribute> ();
indentation = 0;
Gtk.TextTag [] tags = position.Tags;
position.ForwardToTagToggle(null);
if (position.Compare(limit) > 0)
{
position = limit;
}
double screen_dpiX = Note.Window.Screen.WidthMm * 254d / Note.Window.Screen.Width;
foreach (Gtk.TextTag tag in tags)
{
if (tag.BackgroundSet)
{
Gdk.Color color = tag.BackgroundGdk;
attributes.Add(new Pango.AttrBackground(
color.Red, color.Green, color.Blue));
}
if (tag.ForegroundSet)
{
Gdk.Color color = tag.ForegroundGdk;
attributes.Add(new Pango.AttrForeground(
color.Red, color.Green, color.Blue));
}
if (tag.IndentSet)
{
layout.Indent = tag.Indent;
}
if (tag.LeftMarginSet)
{
indentation = (int)(tag.LeftMargin / screen_dpiX * dpiX);
}
if (tag.RightMarginSet)
{
indentation = (int)(tag.RightMargin / screen_dpiX * dpiX);
}
if (tag.FontDesc != null)
{
attributes.Add(new Pango.AttrFontDesc(tag.FontDesc));
}
if (tag.FamilySet)
{
attributes.Add(new Pango.AttrFamily(tag.Family));
}
if (tag.SizeSet)
{
attributes.Add(new Pango.AttrSize(tag.Size));
}
if (tag.StyleSet)
{
attributes.Add(new Pango.AttrStyle(tag.Style));
}
if (tag.UnderlineSet && tag.Underline != Pango.Underline.Error)
{
attributes.Add(new Pango.AttrUnderline(tag.Underline));
}
if (tag.WeightSet)
{
attributes.Add(new Pango.AttrWeight(tag.Weight));
}
if (tag.StrikethroughSet)
{
attributes.Add(new Pango.AttrStrikethrough(tag.Strikethrough));
}
if (tag.RiseSet)
{
attributes.Add(new Pango.AttrRise(tag.Rise));
}
if (tag.ScaleSet)
{
attributes.Add(new Pango.AttrScale(tag.Scale));
}
if (tag.StretchSet)
{
attributes.Add(new Pango.AttrStretch(tag.Stretch));
}
}
return(attributes);
}
