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// guix-web - Web interface for GNU Guix
// Copyright © 2014 David Thompson <davet@gnu.org>
//
// This program is free software: you can redistribute it and/or
// modify it under the terms of the GNU Affero 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
// Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public
// License along with this program. If not, see
// <http://www.gnu.org/licenses/>.
var guix = {};
// Shorthand for Kefir module.
var K = Kefir;
// Here is a perfect example of why Scheme is better than JavaScript:
// + is an operator, not a function. So if I want to, say, compute
// the sum of an array of numbers, I need to write a wrapper function.
guix.add = function(x, y) {
return x + y;
};
guix.clamp = function(n, min, max) {
return Math.max(Math.min(n, max), min);
};
guix.chunk = function(array, size) {
return array.reduce(function(memo, value, i) {
var currentSlice = _(memo).last();
if(i / size < memo.length) {
currentSlice.push(value);
} else {
memo.push([value]);
}
return memo;
}, []);
};
// Mithril + Kefir integration
guix.withEmit = function(emitter) {
return emitter.emit.bind(emitter);
};
guix.withEmitAttr = function(attr, emitter) {
return m.withAttr(attr, guix.withEmit(emitter));
};
guix.makeModule = function(controller) {
var view = m.prop([]);
// Cheat the module system a bit.
return {
controller: function() {
controller().onValue(function(newView) {
m.startComputation();
view(newView);
m.endComputation();
});
},
view: function() {
return view();
}
};
};
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