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/* cellrenderer-uri.vala
*
* Copyright (C) 2011 Matthias Klumpp
* based on work by Richard Hughes
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Author:
* Matthias Klumpp <matthias@nlinux.org>
*/
using GLib;
using Gtk;
using Gdk;
enum CruProp {
ZERO,
URI,
CLICKED
}
public class CellRendererUri : CellRendererText {
private HashTable<string, bool> clickTab;
public string uri { get; set; }
public signal void clicked (string url);
public CellRendererUri () {
uri = "";
clickTab = new HashTable <string, bool> (str_hash, str_equal);
}
private bool is_clicked () {
bool value = clickTab.lookup (uri);
return value;
}
private void set_clicked (bool b) {
if (b)
clickTab.insert (uri, true);
else
clickTab.remove (uri);
}
protected override bool activate (Event event, Widget widget,
string path, Rectangle background_area,
Rectangle cell_area, CellRendererState flags) {
if (uri == "")
return false;
set_clicked (true);
clicked (uri);
return true;
}
protected new void get_property (uint param_id, Value value, ParamSpec pspec) {
switch (param_id) {
case CruProp.URI:
value = uri;
break;
case CruProp.CLICKED:
bool ret = is_clicked ();
value = ret;
break;
default:
warning ("Invalid ID!");
break;
}
}
protected new void set_property (uint param_id, Value value, ParamSpec pspec) {
switch (param_id) {
case CruProp.URI:
uri = "";
uri = value.get_string ();
break;
case CruProp.CLICKED:
bool ret = value.get_boolean ();
set_clicked (ret);
break;
default:
warning ("Invalid property ID!");
break;
}
}
private void set_link_rgba (RGBA color, bool visited)
{
const double color_half = 0.5;
const double offset = 1.0 / 3;
if (visited) {
if (color.red < color_half && color.blue < color_half) {
color.red += offset;
color.blue += offset;
return;
}
if (color.green > color_half) {
color.green -= offset;
return;
}
} else {
if (color.blue < color_half) {
color.blue += offset;
return;
}
if (color.red > color_half && color.green > color_half) {
color.red -= offset;
color.green -= offset;
return;
}
}
debug ("cannot get color for %f,%f,%f", color.red, color.blue, color.green);
}
protected override void render (Cairo.Context cr,
Widget widget,
Rectangle background_area,
Rectangle cell_area,
CellRendererState flags)
{
bool ret;
StyleContext style;
RGBA rgba;
Color? color = null;
string color_string;
ret = is_clicked ();
/* get a copy of the widget color */
style = widget.get_style_context ();
/* set colour */
if (uri == "") {
rgba = style.get_color (StateFlags.NORMAL);
color_string = rgba.to_string ();
this.foreground = color_string;
this.underline = Pango.Underline.NONE;
} else if (ret) {
/* if we defined this in our theme, else find a compromise */
style.get_style ("visited-link-color", out color,
null);
if (color == null) {
rgba = style.get_color (StateFlags.NORMAL);
set_link_rgba (rgba, true);
color_string = rgba.to_string ();
} else {
color_string = color.to_string ();
}
this.foreground = color_string;
this.underline = Pango.Underline.SINGLE;
} else {
/* if we defined this in our theme, else find a compromise */
style.get_style ("link-color", out color,
null);
if (color == null) {
rgba = style.get_color (StateFlags.NORMAL);
set_link_rgba (rgba, false);
color_string = rgba.to_string ();
} else {
color_string = color.to_string ();
}
this.foreground = color_string;
this.underline = Pango.Underline.SINGLE;
}
/* can we select the text or click it? */
if (uri == "") {
this.editable = true;
this.mode = CellRendererMode.EDITABLE;
} else {
this.mode = CellRendererMode.ACTIVATABLE;
}
base.render (cr, widget, background_area, cell_area, flags);
}
}
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