void PrintNotesNoteAddin::on_begin_print(const Glib::RefPtr<Gtk::PrintContext>& context)
{
m_timestamp_footer = create_layout_for_timestamp(context);
// Create and initialize the page margins
m_margin_top = cm_to_pixel (1.5, context->get_dpi_y());
m_margin_left = cm_to_pixel (1, context->get_dpi_x());
m_margin_right = cm_to_pixel (1, context->get_dpi_x());
m_margin_bottom = 0;
double max_height = pango_units_from_double(context->get_height()
- m_margin_top - m_margin_bottom
- compute_footer_height(context));
DBG_OUT("margins = %d %d %d %d", m_margin_top, m_margin_left,
m_margin_right, m_margin_bottom);
m_page_breaks.clear();
Gtk::TextIter position;
Gtk::TextIter end_iter;
get_buffer()->get_bounds (position, end_iter);
double page_height = 0;
bool done = position.compare (end_iter) >= 0;
while (!done) {
Gtk::TextIter line_end = position;
if (!line_end.ends_line ()) {
line_end.forward_to_line_end ();
}
int paragraph_number = position.get_line();
int indentation = 0;
Glib::RefPtr<Pango::Layout> layout = create_layout_for_paragraph(
context, position, line_end, indentation);
Pango::Rectangle ink_rect;
Pango::Rectangle logical_rect;
for(int line_in_paragraph = 0; line_in_paragraph < layout->get_line_count();
line_in_paragraph++) {
Glib::RefPtr<Pango::LayoutLine> line = layout->get_line(line_in_paragraph);
line->get_extents (ink_rect, logical_rect);
if ((page_height + logical_rect.get_height()) >= max_height) {
PageBreak(paragraph_number, line_in_paragraph);
m_page_breaks.push_back (PageBreak(paragraph_number, line_in_paragraph));
page_height = 0;
}
page_height += logical_rect.get_height();
}
position.forward_line ();
done = position.compare (end_iter) >= 0;
}
m_print_op->set_n_pages(m_page_breaks.size() + 1);
}
Glib::RefPtr<Pango::Layout>
PrintNotesNoteAddin::create_layout_for_paragraph(const Glib::RefPtr<Gtk::PrintContext> & context,
Gtk::TextIter p_start,
Gtk::TextIter p_end,
int & indentation)
{
Glib::RefPtr<Pango::Layout> layout = context->create_pango_layout();
layout->set_font_description(
get_window()->editor()->get_pango_context()->get_font_description());
int start_index = p_start.get_line_index();
indentation = 0;
double dpiX = context->get_dpi_x();
{
Pango::AttrList attr_list;
Gtk::TextIter segm_start = p_start;
Gtk::TextIter segm_end;
while (segm_start.compare (p_end) < 0) {
segm_end = segm_start;
std::list<Pango::Attribute> attrs;
get_paragraph_attributes (layout, dpiX, indentation,
segm_end, p_end, attrs);
guint si = (guint) (segm_start.get_line_index() - start_index);
guint ei = (guint) (segm_end.get_line_index() - start_index);
for(std::list<Pango::Attribute>::iterator iter = attrs.begin();
iter != attrs.end(); ++iter) {
Pango::Attribute & a(*iter);
a.set_start_index(si);
a.set_end_index(ei);
attr_list.insert(a);
}
segm_start = segm_end;
}
layout->set_attributes(attr_list);
}
gnote::DepthNoteTag::Ptr depth = get_buffer()->find_depth_tag(p_start);
if(depth) {
indentation += ((int) (dpiX / 3)) * depth->get_depth();
}
layout->set_width(pango_units_from_double((int)context->get_width() -
m_margin_left - m_margin_right - indentation));
layout->set_wrap (Pango::WRAP_WORD_CHAR);
layout->set_text (get_buffer()->get_slice (p_start, p_end, false));
return layout;
}
void PrintNotesNoteAddin::on_draw_page(const Glib::RefPtr<Gtk::PrintContext>& context, guint page_nr)
{
Cairo::RefPtr<Cairo::Context> cr = context->get_cairo_context();
cr->move_to (m_margin_left, m_margin_top);
PageBreak start;
if (page_nr != 0) {
start = m_page_breaks [page_nr - 1];
}
PageBreak end(-1, -1);
if (m_page_breaks.size() > page_nr) {
end = m_page_breaks [page_nr];
}
Gtk::TextIter position;
Gtk::TextIter end_iter;
get_buffer()->get_bounds (position, end_iter);
// Fast-forward to the starting line
while (position.get_line() < start.get_paragraph()) {
position.forward_line ();
}
bool done = position.compare (end_iter) >= 0;
while (!done) {
Gtk::TextIter line_end = position;
if (!line_end.ends_line ()) {
line_end.forward_to_line_end ();
}
int paragraph_number = position.get_line();
int indentation;
{
Glib::RefPtr<Pango::Layout> layout =
create_layout_for_paragraph (context,position, line_end, indentation);
for(int line_number = 0;
line_number < layout->get_line_count() && !done;
line_number++) {
// Skip the lines up to the starting line in the
// first paragraph on this page
if ((paragraph_number == start.get_paragraph()) &&
(line_number < start.get_line())) {
continue;
}
// Break as soon as we hit the end line
if ((paragraph_number == end.get_paragraph()) &&
(line_number == end.get_line())) {
done = true;
break;
}
Glib::RefPtr<Pango::LayoutLine> line = layout->get_line(line_number);
Pango::Rectangle ink_rect;
Pango::Rectangle logical_rect;
line->get_extents (ink_rect, logical_rect);
double curX, curY;
cr->get_current_point(curX, curY);
cr->move_to (m_margin_left + indentation, curY);
int line_height = pango_units_to_double(logical_rect.get_height());
double x, y;
x = m_margin_left + indentation;
cr->get_current_point(curX, curY);
y = curY + line_height;
pango_cairo_show_layout_line(cr->cobj(), line->gobj());
cr->move_to(x, y);
}
}
position.forward_line ();
done = done || (position.compare (end_iter) >= 0);
}
// Print the footer
int total_height = context->get_height();
int total_width = context->get_width();
int footer_height = 0;
double footer_anchor_x, footer_anchor_y;
{
Glib::RefPtr<Pango::Layout> pages_footer
= create_layout_for_pagenumbers (context, page_nr + 1,
m_page_breaks.size() + 1);
Pango::Rectangle ink_footer_rect;
Pango::Rectangle logical_footer_rect;
pages_footer->get_extents(ink_footer_rect, logical_footer_rect);
footer_anchor_x = cm_to_pixel(0.5, context->get_dpi_x());
footer_anchor_y = total_height - m_margin_bottom;
footer_height = pango_units_to_double(logical_footer_rect.get_height());
cr->move_to(total_width - pango_units_to_double(logical_footer_rect.get_width()) - cm_to_pixel(0.5, context->get_dpi_x()), footer_anchor_y);
pango_cairo_show_layout_line(cr->cobj(),
(pages_footer->get_line(0))->gobj());
}
cr->move_to(footer_anchor_x, footer_anchor_y);
pango_cairo_show_layout_line(cr->cobj(),
(m_timestamp_footer->get_line(0))->gobj());
cr->move_to(cm_to_pixel(0.5, context->get_dpi_x()),
total_height - m_margin_bottom - footer_height);
cr->line_to(total_width - cm_to_pixel(0.5, context->get_dpi_x()),
total_height - m_margin_bottom - footer_height);
cr->stroke();
}