X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftext.cpp;h=5fc546c21dfe30a0c2eb9eb30662703490bf0c7e;hb=0af3c2393bd00f39db3bfaf5b78a7a44f0fd5ff1;hp=d48c33f0a3ba1f7ca8350ff2a908c3d76204082c;hpb=a87d05583cb7dffaf0e0f5eb9f9b2fc0bcf656e1;p=libs%2Fgltk.git

diff --git a/source/text.cpp b/source/text.cpp
index d48c33f..5fc546c 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"
@@ -8,36 +15,45 @@ using namespace std;
 namespace Msp {
 namespace GLtk {
 
-Text::Text(const Style *const &s):
-	style(s)
+Text::Text():
+	style(0)
 { }
 
-Text::Text(const Style *const &s, const string &t):
-	style(s)
+Text::Text(const Style &s, const string &t):
+	style(&s)
 {
 	set(t);
 }
 
+void Text::set_style(const Style *s)
+{
+	style = s;
+
+	float font_size = style->get_font()->get_default_size();
+	for(vector<Line>::iterator i=lines.begin(); i!=lines.end(); ++i)
+		i->width = static_cast<unsigned>(style->get_font()->get_string_width(text.substr(i->start, i->length))*font_size);
+}
+
 unsigned Text::get_width() const
 {
-	unsigned width=0;
+	unsigned width = 0;
 	for(vector<Line>::const_iterator i=lines.begin(); i!=lines.end(); ++i)
-		width=max(width, i->width);
+		width = max(width, i->width);
 	return width;
 }
 
 unsigned Text::get_height() 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=line_height*6/5;
+	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 = line_height*6/5;
 	return line_height+(lines.size()-1)*line_spacing;
 }
 
 void Text::set(const string &t)
 {
-	text=t;
+	text = t;
 	find_lines();
 }
 
@@ -52,10 +68,10 @@ void Text::erase(unsigned pos, unsigned len)
 		find_lines();
 	else
 	{
-		i->length-=len;
+		i->length -= len;
 
 		for(++i; i!=lines.end(); ++i)
-			i->start-=len;
+			i->start -= len;
 	}
 }
 
@@ -70,18 +86,68 @@ void Text::insert(unsigned pos, const string &s)
 		vector<Line>::iterator i;
 		for(i=lines.begin(); (i!=lines.end() && i->start+i->length<pos); ++i) ;
 
-		i->length+=s.size();
+		i->length += s.size();
 
 		for(++i; i!=lines.end(); ++i)
-			i->start+=s.size();
+			i->start += s.size();
 	}
 }
 
-void Text::update_style()
+unsigned Text::get_line_length(unsigned i) const
 {
-	float font_size=style->get_font()->get_default_size();
-	for(vector<Line>::iterator i=lines.begin(); i!=lines.end(); ++i)
-		i->width=static_cast<unsigned>(style->get_font()->get_string_width(text.substr(i->start, i->length))*font_size);
+	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
@@ -89,24 +155,24 @@ void Text::render(const Part &part, const Geometry &geom) const
 	if(lines.empty())
 		return;
 
-	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 height=line_height+(lines.size()-1)*line_spacing;
-	int y_offset=static_cast<int>(-font->get_descent()*font_size);
+	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);
 
-	const GL::Color &color=style->get_font_color();
+	const GL::Color &color = style->get_font_color();
 	GL::Immediate imm((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2));
 	imm.color(color.r, color.g, color.b);
 	for(unsigned i=0; i<lines.size(); ++i)
 	{
-		const Line &line=lines[i];
+		const Line &line = lines[i];
 
 		Geometry rgeom;
-		rgeom.w=line.width;
-		rgeom.h=height;
-		rgeom.y=(lines.size()-1-i)*line_spacing+y_offset;
+		rgeom.w = line.width;
+		rgeom.h = height;
+		rgeom.y = (lines.size()-1-i)*line_spacing+y_offset;
 		part.get_alignment().apply(rgeom, geom, part.get_margin());
 
 		GL::push_matrix();
@@ -128,21 +194,21 @@ Text &Text::operator=(const string &t)
 void Text::find_lines()
 {
 	lines.clear();
-	float font_size=style->get_font()->get_default_size();
-	string::size_type start=0;
+	float font_size = style->get_font()->get_default_size();
+	string::size_type start = 0;
 	while(1)
 	{
-		string::size_type newline=text.find('\n', start);
+		string::size_type newline = text.find('\n', start);
 
 		Line line;
-		line.start=start;
-		line.length=(newline==string::npos ? text.size() : newline)-start;
-		line.width=static_cast<unsigned>(style->get_font()->get_string_width(text.substr(line.start, line.length))*font_size);
+		line.start = start;
+		line.length = (newline==string::npos ? text.size() : newline)-start;
+		line.width = static_cast<unsigned>(style->get_font()->get_string_width(text.substr(line.start, line.length))*font_size);
 		lines.push_back(line);
 
 		if(newline==string::npos)
 			break;
-		start=newline+1;
+		start = newline+1;
 	}
 }