From 5953940291655be97dfd25d43c0cf0a6b4e38edf Mon Sep 17 00:00:00 2001 From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?= Date: Sun, 29 Jul 2012 00:34:26 +0200 Subject: [PATCH] Add filter for concise numbers (three most significant digits only). --- .../demoscenemusic/core/TemplateServlet.java | 2 + .../template/ConciseNumberFilter.java | 62 ++++++++++++++++++++++ 2 files changed, 64 insertions(+) create mode 100644 src/main/java/net/pterodactylus/demoscenemusic/template/ConciseNumberFilter.java diff --git a/src/main/java/net/pterodactylus/demoscenemusic/core/TemplateServlet.java b/src/main/java/net/pterodactylus/demoscenemusic/core/TemplateServlet.java index b6107a6..7b4f8c7 100644 --- a/src/main/java/net/pterodactylus/demoscenemusic/core/TemplateServlet.java +++ b/src/main/java/net/pterodactylus/demoscenemusic/core/TemplateServlet.java @@ -44,6 +44,7 @@ import net.pterodactylus.demoscenemusic.data.Track; import net.pterodactylus.demoscenemusic.data.TrackDerivative; import net.pterodactylus.demoscenemusic.data.User; import net.pterodactylus.demoscenemusic.page.ServletRequest; +import net.pterodactylus.demoscenemusic.template.ConciseNumberFilter; import net.pterodactylus.demoscenemusic.template.DurationFilter; import net.pterodactylus.demoscenemusic.template.PropertiesAccessor; import net.pterodactylus.demoscenemusic.template.TrackDerivativeAccessor; @@ -121,6 +122,7 @@ public class TemplateServlet extends HttpServlet { templateContextFactory.addFilter("sort", sortFilter); templateContextFactory.addFilter("matches", new MatchFilter()); templateContextFactory.addFilter("time", new DurationFilter()); + templateContextFactory.addFilter("concise", new ConciseNumberFilter()); templateContextFactory.addTemplateObject("core", core); templateContextFactory.addTemplateObject("dataManager", core.getDataManager()); diff --git a/src/main/java/net/pterodactylus/demoscenemusic/template/ConciseNumberFilter.java b/src/main/java/net/pterodactylus/demoscenemusic/template/ConciseNumberFilter.java new file mode 100644 index 0000000..9ea4b8c --- /dev/null +++ b/src/main/java/net/pterodactylus/demoscenemusic/template/ConciseNumberFilter.java @@ -0,0 +1,62 @@ +/* + * DemosceneMusic - ConciseNumberFilter.java - Copyright © 2012 David Roden + * + * 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 . + */ + +package net.pterodactylus.demoscenemusic.template; + +import java.util.Arrays; +import java.util.List; +import java.util.Map; + +import net.pterodactylus.util.number.Numbers; +import net.pterodactylus.util.template.Filter; +import net.pterodactylus.util.template.TemplateContext; + +/** + * {@link Filter} implementation that only shows the three most significant + * digits of a number, adding prefix for kilo (kibi, actually), mega (mebi), et + * cetera, as necessary. + * + * @author David ‘Bombe’ Roden + */ +public class ConciseNumberFilter implements Filter { + + private static final List prefixes = Arrays.asList("", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei"); + + /** + * {@inheritDoc} + */ + @Override + public Object format(TemplateContext templateContext, Object data, Map parameters) { + double number = Numbers.safeParseLong(data, 0L); + int prefix = 0; + while (number > 1023) { + prefix++; + number /= 1024.0; + } + if (number >= 1000) { + return String.format("%1.2f %s", number / 1024.0, prefixes.get(prefix + 1)); + } + if (number >= 100) { + return String.format("%1.0f %s", number, prefixes.get(prefix)); + } + if (number >= 10) { + return String.format("%1.1f %s", number, prefixes.get(prefix)); + } + return String.format("%1.2f %s", number, prefixes.get(prefix)); + } + +} -- 2.7.4