public Pango.LayoutLine GetLineReadonly(int line)
{
IntPtr raw_ret = pango_layout_get_line_readonly(Handle, line);
Pango.LayoutLine ret = raw_ret == IntPtr.Zero ? null : (Pango.LayoutLine)GLib.Opaque.GetOpaque(raw_ret, typeof(Pango.LayoutLine), false);
return(ret);
}
public static Cairo.Region LayoutLineGetClipRegion(Pango.LayoutLine line, int x_origin, int y_origin, out int index_ranges, int n_ranges)
{
IntPtr raw_ret = gdk_pango_layout_line_get_clip_region(line == null ? IntPtr.Zero : line.Handle, x_origin, y_origin, out index_ranges, n_ranges);
Cairo.Region ret = new Cairo.Region(raw_ret);
return(ret);
}
private void OnBeginPrint(object sender, Gtk.BeginPrintArgs args)
{
Gtk.PrintOperation op = (Gtk.PrintOperation)sender;
Gtk.PrintContext context = args.Context;
timestamp_footer = CreateTimestampLayout(context);
// FIXME: These should be configurable settings later (UI Change)
margin_top = CmToPixel(1.5, context.DpiY);
margin_left = CmToPixel(1, context.DpiX);
margin_right = CmToPixel(1, context.DpiX);
margin_bottom = 0;
double max_height = Pango.Units.FromPixels((int)context.Height -
margin_top - margin_bottom - ComputeFooterHeight(context));
Gtk.TextIter position;
Gtk.TextIter end_iter;
Buffer.GetBounds(out position, out end_iter);
double page_height = 0;
bool done = position.Compare(end_iter) >= 0;
while (!done)
{
Gtk.TextIter line_end = position;
if (!line_end.EndsLine())
{
line_end.ForwardToLineEnd();
}
int paragraph_number = position.Line;
int indentation;
using (Pango.Layout layout = CreateParagraphLayout(
context, position, line_end, out indentation)) {
Pango.Rectangle ink_rect = Pango.Rectangle.Zero;
Pango.Rectangle logical_rect = Pango.Rectangle.Zero;
for (int line_in_paragraph = 0; line_in_paragraph < layout.LineCount;
line_in_paragraph++)
{
Pango.LayoutLine line = layout.GetLine(line_in_paragraph);
line.GetExtents(ref ink_rect, ref logical_rect);
if (page_height + logical_rect.Height >= max_height)
{
PageBreak page_break = new PageBreak(
paragraph_number, line_in_paragraph);
page_breaks.Add(page_break);
page_height = 0;
}
page_height += logical_rect.Height;
}
position.ForwardLine();
done = position.Compare(end_iter) >= 0;
}
}
op.NPages = page_breaks.Count + 1;
}
public static Size GetSize(this Pango.LayoutLine line)
{
var ext = new Pango.Rectangle();
var extl = new Pango.Rectangle();
var scale = Pango.Scale.PangoScale;
line.GetExtents(ref ext, ref extl);
return(new Size(extl.Width / scale, extl.Height / scale));
}
private void EllipsizeLayout(int width)
{
// no room to draw anything
if (width < 1)
{
layout.SetMarkup("");
return;
}
// plenty of room
int lw, lh;
layout.GetPixelSize(out lw, out lh);
if (width > lw)
{
return;
}
// not enough room for ...
int ell_w, ell_h;
Pango.Layout ell = layout.Copy();
ell.SetMarkup("...");
ell.GetPixelSize(out ell_w, out ell_h);
if (width < ell_w)
{
layout.SetMarkup("");
return;
}
// subtract ellipses width
width -= ell_w;
int index, trailing;
Pango.LayoutLine line = layout.GetLine(0);
if (line.XToIndex(width * 1024, out index, out trailing))
{
// Console.WriteLine ("length: {0} index: {1} trailing: {2}", layout.Text.Length, index, trailing);
// FIXME: breaks on accented chars
if (index < layout.Text.Length)
{
layout.SetMarkup(layout.Text.Substring(0, index) + "...");
}
}
}
public void DrawLayoutLine(Pango.LayoutLine line, int x, int y)
{
pango_renderer_draw_layout_line(Handle, line == null ? IntPtr.Zero : line.Handle, x, y);
}
public void OnDrawPage(object sender, Gtk.DrawPageArgs args)
{
using (Cairo.Context cr = args.Context.CairoContext) {
cr.MoveTo(margin_left, margin_top);
PageBreak start;
if (args.PageNr == 0)
{
start = new PageBreak(0, 0);
}
else
{
start = page_breaks [args.PageNr - 1];
}
PageBreak end;
if (args.PageNr < page_breaks.Count)
{
end = page_breaks [args.PageNr];
}
else
{
end = new PageBreak(-1, -1);
}
Gtk.PrintContext context = args.Context;
Gtk.TextIter position;
Gtk.TextIter end_iter;
Buffer.GetBounds(out position, out end_iter);
// Fast-forward to the right starting paragraph
while (position.Line < start.Paragraph)
{
position.ForwardLine();
}
bool done = position.Compare(end_iter) >= 0;
while (!done)
{
Gtk.TextIter line_end = position;
if (!line_end.EndsLine())
{
line_end.ForwardToLineEnd();
}
int paragraph_number = position.Line;
int indentation;
using (Pango.Layout layout = CreateParagraphLayout(
context, position, line_end, out indentation)) {
for (int line_number = 0;
line_number < layout.LineCount && !done;
line_number++)
{
// Skip the lines up to the starting line in the
// first paragraph on this page
if ((paragraph_number == start.Paragraph) &&
(line_number < start.Line))
{
continue;
}
// Break as soon as we hit the end line
if ((paragraph_number == end.Paragraph) &&
(line_number == end.Line))
{
done = true;
break;
}
Pango.LayoutLine line = layout.Lines [line_number];
Pango.Rectangle ink_rect = Pango.Rectangle.Zero;
Pango.Rectangle logical_rect = Pango.Rectangle.Zero;
line.GetExtents(ref ink_rect, ref logical_rect);
cr.MoveTo(margin_left + indentation,
cr.CurrentPoint.Y);
int line_height = Pango.Units.ToPixels(logical_rect.Height);
Cairo.PointD new_line_point = new Cairo.PointD(
margin_left + indentation,
cr.CurrentPoint.Y + line_height);
Pango.CairoHelper.ShowLayoutLine(cr, line);
cr.MoveTo(new_line_point);
}
}
position.ForwardLine();
done = done || position.Compare(end_iter) >= 0;
}
int total_height = (int)args.Context.Height;
int total_width = (int)args.Context.Width;
int footer_height = 0;
Cairo.PointD footer_anchor;
using (Pango.Layout pages_footer = CreatePagenumbersLayout(
args.Context, args.PageNr + 1, page_breaks.Count + 1)) {
Pango.Rectangle ink_footer_rect;
Pango.Rectangle logical_footer_rect;
pages_footer.GetExtents(out ink_footer_rect, out logical_footer_rect);
footer_anchor = new Cairo.PointD(
CmToPixel(0.5, args.Context.DpiX),
total_height - margin_bottom);
footer_height = Pango.Units.ToPixels(logical_footer_rect.Height);
cr.MoveTo(
total_width - Pango.Units.ToPixels(logical_footer_rect.Width) -
CmToPixel(0.5, args.Context.DpiX),
footer_anchor.Y);
Pango.CairoHelper.ShowLayoutLine(cr, pages_footer.Lines [0]);
}
cr.MoveTo(footer_anchor);
Pango.CairoHelper.ShowLayoutLine(cr, timestamp_footer.Lines [0]);
cr.MoveTo(CmToPixel(0.5, args.Context.DpiX),
total_height - margin_bottom - footer_height);
cr.LineTo(total_width - CmToPixel(0.5, args.Context.DpiX),
total_height - margin_bottom - footer_height);
cr.Stroke();
}
}
protected void prototype(Pango.Layout pl, double x, double y)
{
var text = pl.Text;
foreach (var l in pl.Lines)
{
Trace.WriteLine(text.Substring(l.StartIndex, Math.Min(l.Length, text.Length - l.StartIndex)));
}
Trace.WriteLine("----------");
// see also: https://github.com/GNOME/tomboy/blob/master/Tomboy/Addins/PrintNotes/PrintNotesNoteAddin.cs
// https://sourcecodebrowser.com/pango1.0/1.14.8/pango-renderer_8c.html#aaceb17b572fe371dc78068a27551ccbc
// try with run
var iter = pl.Iter;
var lastline = default(Pango.LayoutLine);
var lli = 0;
var ll = 0;
var li = 0;
//text = text.Replace ("\n", "");//.Replace("\r","");
do
{
if (iter.Run.Glyphs != null)
{
ll = iter.Run.Glyphs.NumGlyphs;
var newline = iter.Line != null && iter.Line.StartIndex != li;
if (newline)
{
li = iter.Line.StartIndex;
}
if (newline && iter.Line.IsParagraphStart)
{
lli++;
}
var s = text.Substring(lli, Math.Min(ll, text.Length - lli));
Trace.WriteLine(s);
lli += ll;
}
} while (iter.NextRun());
Trace.WriteLine("----------");
lastline = default(Pango.LayoutLine);
lli = 0;
ll = 0;
li = 0;
iter = pl.Iter;
var iRun = 0;
var numGlyph = 0;
Pango.LayoutLine line = null;
Pango.LayoutRun run;;
//text = text.Replace ("\n", "");//.Replace("\r","");
Action render = () => {
if (numGlyph == 0)
{
return;
}
ll = numGlyph;
var newline = line != null && line.StartIndex != li;
if (newline)
{
li = line.StartIndex;
}
if (iter.Line.StartIndex != line.StartIndex && iter.Line.IsParagraphStart)
{
ll--;
}
var s = text.Substring(lli, Math.Min(ll, text.Length - lli));
Trace.WriteLine(s);
if (iter.Line.IsParagraphStart)
{
ll++;
}
lli += ll;
};
do
{
var newRun = iter.Run.Glyphs != null && iter.Run.Item.Offset != iRun;
if (newRun)
{
iRun = iter.Run.Item.Offset;
render();
numGlyph = 0;
line = null;
}
if (line == null)
{
line = iter.Line;
run = iter.Run;
}
numGlyph++;
} while (iter.NextChar());
render();
iter = pl.Iter;
var logical_rect = new Pango.Rectangle();
var lineX = 0;
Action <string, Func <bool> > traceiter = (s, f) => {
lastline = null;
Trace.Write(s + "\t");
iter = pl.Iter;
do
{
var newLine = lastline == null || lastline.StartIndex != iter.Line.StartIndex;
Trace.Write(string.Format("{1}{0}", iter.Index, (newLine ? "|" : " ")));
if (newLine)
{
lastline = iter.Line;
}
} while (f());
Trace.WriteLine("");
};
traceiter("line", () => iter.NextLine());
traceiter("run", () => iter.NextRun());
traceiter("cluster", () => iter.NextCluster());
traceiter("char", () => iter.NextChar());
}
// TODO: mix with CairoContextBackendHandler.DrawTextLayout
void Analyselayout(Pango.Layout pl, double x, double y)
{
var text = pl.Text;
var iter = pl.Iter;
var lli = 0;
var ll = 0;
var li = 0;
var iRun = 0;
var numGlyph = 0;
Pango.LayoutLine line = null;
Pango.LayoutRun run;
Action render = () => {
if (numGlyph == 0)
{
return;
}
ll = numGlyph;
var newline = line != null && line.StartIndex != li;
if (newline)
{
li = line.StartIndex;
}
if (iter.Line.StartIndex != line.StartIndex && iter.Line.IsParagraphStart)
{
ll--;
}
var s = text.Substring(lli, Math.Min(ll, text.Length - lli));
Trace.WriteLine(s);
if (iter.Line.IsParagraphStart)
{
ll++;
}
lli += ll;
};
do
{
var newRun = iter.Run.Glyphs != null && iter.Run.Item.Offset != iRun;
if (newRun)
{
iRun = iter.Run.Item.Offset;
render();
numGlyph = 0;
line = null;
}
if (line == null)
{
line = iter.Line;
run = iter.Run;
}
numGlyph++;
} while (iter.NextChar());
render();
}
public static void LayoutLinePath(Cairo.Context cr, Pango.LayoutLine line)
{
pango_cairo_layout_line_path(cr == null ? IntPtr.Zero : cr.Handle, line == null ? IntPtr.Zero : line.Handle);
}
public static void ShowLayoutLine(Cairo.Context cr, Pango.LayoutLine line)
{
pango_cairo_show_layout_line(cr == null ? IntPtr.Zero : cr.Handle, line == null ? IntPtr.Zero : line.Handle);
}
IEnumerable <Line> Analyselayout(Pango.Layout pl)
{
var text = pl.Text;
var iter = pl.Iter;
var lli = 0;
var ll = 0;
var li = 0;
var iRun = 0;
var numGlyph = 0;
Pango.LayoutLine line = iter.Line;
Pango.LayoutRun run = iter.Run;
var scale = Pango.Scale.PangoScale;
Func <Line> render = () => {
if (numGlyph == 0)
{
return(default(Line));
}
ll = numGlyph;
var newline = line != null && line.StartIndex != li;
if (newline)
{
li = line.StartIndex;
}
if (iter.Line.StartIndex != line.StartIndex && iter.Line.IsParagraphStart)
{
ll--;
}
var llrect = new Pango.Rectangle();
var rect = new Pango.Rectangle();
line.GetExtents(ref rect, ref llrect);
var lline = new Line {
Pos = lli, Len = Math.Min(ll, text.Length - lli), Width = run.Glyphs.Width, Height = llrect.Height / scale
};
if (iter.Line.IsParagraphStart)
{
ll++;
}
lli += ll;
return(lline);
};
do
{
var newRun = iter.Run.Glyphs != null && iter.Run.Item.Offset != iRun;
if (newRun)
{
iRun = iter.Run.Item.Offset;
yield return(render());
numGlyph = 0;
line = null;
}
if (line == null)
{
line = iter.Line;
run = iter.Run;
}
numGlyph++;
} while(iter.NextChar());
yield return(render());
}
