X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftext.cpp;h=d18d7b5ba6c03fc233026afd178220d30b2babe0;hb=ef4660c4bdf38e126e13b426649fc2f997027b65;hp=31db228071943fc55f0f3942b16a32a50dcb3c90;hpb=6081ed9020ad22214a8e5b3829092f97b12d7c71;p=libs%2Fgltk.git

diff --git a/source/text.cpp b/source/text.cpp
index 31db228..d18d7b5 100644
--- a/source/text.cpp
+++ b/source/text.cpp
@@ -1,3 +1,10 @@
+/* $Id$
+
+This file is part of libmspgltk
+Copyright © 2009-2010  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
 #include <msp/gl/immediate.h>
 #include <msp/gl/matrix.h>
 #include "style.h"
@@ -86,6 +93,63 @@ void Text::insert(unsigned pos, const string &s)
 	}
 }
 
+unsigned Text::get_line_length(unsigned i) const
+{
+	if(i>=lines.size())
+		throw InvalidParameterValue("Invalid line number");
+	return lines[i].length;
+}
+
+void Text::offset_to_coords(unsigned offs, unsigned &row, unsigned &col) const
+{
+	if(lines.empty())
+	{
+		row=0;
+		col=0;
+		return;
+	}
+
+	for(unsigned i=0; i<lines.size(); ++i)
+		if(offs>=lines[i].start && offs<=lines[i].start+lines[i].length)
+		{
+			row=i;
+			col=offs-lines[i].start;
+			return;
+		}
+}
+
+unsigned Text::coords_to_offset(unsigned row, unsigned col) const
+{
+	if(row>=lines.size())
+		return text.size();
+
+	return lines[row].start+min(col, lines[row].length);
+}
+
+Geometry Text::coords_to_geometry(unsigned row, unsigned col) const
+{
+	if(row>=lines.size())
+		row=lines.size()-1;
+	const Line &line=lines[row];
+	if(col>line.length)
+		col=line.length;
+
+	const GL::Font *font=style->get_font();
+	float font_size=font->get_default_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);
+
+	Geometry geom;
+	geom.w=line.width;
+	geom.h=height;
+	geom.x=static_cast<unsigned>(font->get_string_width(text.substr(line.start, col))*font_size);
+	geom.y=(lines.size()-1-row)*line_spacing+y_offset;
+
+	return geom;
+}
+
 void Text::render(const Part &part, const Geometry &geom) const
 {
 	if(lines.empty())
@@ -94,7 +158,7 @@ void Text::render(const Part &part, const Geometry &geom) const
 	const GL::Font *font=style->get_font();
 	float font_size=font->get_default_size();
 	unsigned line_height=static_cast<unsigned>((font->get_ascent()-font->get_descent())*font_size);
-	unsigned line_spacing=font_size*6/5;
+	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);