X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftext.cpp;h=1d824e0ddb9ca590f551748921503e626bcdd931;hb=7c1b1b44dc3726d6cdb4681f9d44189eb4102a5a;hp=1d7a7930dc4bc58c695e8d2082fb5895e9598f66;hpb=8d09cdc5e642af9a2e1210ce708790c5b41cb585;p=libs%2Fgltk.git

diff --git a/source/text.cpp b/source/text.cpp
index 1d7a793..1d824e0 100644
--- a/source/text.cpp
+++ b/source/text.cpp
@@ -115,6 +115,22 @@ void Text::insert(unsigned pos, const string &s)
 	}
 }
 
+unsigned Text::get_visible_lines(const Part &part, const Geometry &parent, unsigned *fit_height) const
+{
+	const GL::Font &font = style->get_font();
+	float font_size = style->get_font_size();
+	unsigned line_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*font_size);
+	unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
+
+	const Sides &margin = part.get_margin();
+	unsigned vmargin = margin.top+margin.bottom+line_height-line_spacing;
+	unsigned n_lines = min<unsigned>(lines.size(), max((max(parent.h, vmargin)-vmargin)/line_spacing, 1U));
+	if(fit_height)
+		*fit_height = line_height+(n_lines-1)*line_spacing;
+
+	return n_lines;
+}
+
 unsigned Text::get_line_length(unsigned i) const
 {
 	if(i>=lines.size())
@@ -225,14 +241,11 @@ void Text::process_lines(const Part &part, const Geometry &parent, unsigned firs
 
 	const GL::Font &font = style->get_font();
 	float font_size = style->get_font_size();
-	unsigned line_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*font_size);
 	unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
-	unsigned height = line_height+(lines.size()-1)*line_spacing;
 	int y_offset = static_cast<int>(-font.get_descent()*font_size);
 
-	const Sides &margin = part.get_margin();
-	unsigned fit_height = parent.h-margin.top-margin.bottom+line_spacing-line_height;
-	unsigned n_lines = min<unsigned>(lines.size(), max(fit_height/line_spacing, 1U));
+	unsigned fit_height;
+	unsigned n_lines = get_visible_lines(part, parent, &fit_height);
 	first_row = min<unsigned>(first_row, lines.size()-n_lines);
 
 	for(unsigned i=0; i<n_lines; ++i)
@@ -241,7 +254,7 @@ void Text::process_lines(const Part &part, const Geometry &parent, unsigned firs
 
 		Geometry rgeom;
 		rgeom.w = line.width;
-		rgeom.h = height;
+		rgeom.h = fit_height;
 		rgeom.y = (n_lines-1-i)*line_spacing+y_offset;
 		part.get_alignment().apply(rgeom, parent, part.get_margin());