package org.apache.isis.viewer.wicket.ui.components.widgets.themepicker;
import de.agilecoders.wicket.core.Bootstrap;
import de.agilecoders.wicket.core.settings.ActiveThemeProvider;
import de.agilecoders.wicket.core.settings.IBootstrapSettings;
import de.agilecoders.wicket.core.settings.ITheme;
import de.agilecoders.wicket.core.settings.SingleThemeProvider;
import de.agilecoders.wicket.core.util.Attributes;
import de.agilecoders.wicket.themes.markup.html.bootstrap.BootstrapThemeTheme;
import de.agilecoders.wicket.themes.markup.html.bootswatch.BootswatchTheme;
import de.agilecoders.wicket.themes.markup.html.bootswatch.BootswatchThemeProvider;
import de.agilecoders.wicket.themes.markup.html.vegibit.VegibitTheme;
import de.agilecoders.wicket.themes.markup.html.vegibit.VegibitThemeProvider;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import org.apache.wicket.AttributeModifier;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.html.list.ListItem;
import org.apache.wicket.markup.html.list.ListView;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.Model;
import org.apache.wicket.util.cookies.CookieUtils;
import org.apache.wicket.util.string.Strings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.isis.core.commons.config.IsisConfiguration;
import org.apache.isis.core.runtime.system.context.IsisContext;
/**
* A panel used as a Navbar item to change the application theme/skin
*/
public class ThemeChooser extends Panel {
private static final Logger LOG = LoggerFactory.getLogger(ThemeChooser.class);
/**
* A configuration setting which value determines whether the theme chooser should be available in the footer
*/
private static final String SHOW_THEME_PICKER_KEY = "isis.viewer.wicket.themes.showChooser";
private static final boolean SHOW_THEME_PICKER_DEFAULT = false;
/**
* A configuration setting which value could be a comma separated list of enabled theme names
*/
private static final String ENABLED_THEMES_KEY = "isis.viewer.wicket.themes.enabled";
/**
* The name of the cookie that stores the last user selection
*/
private static final String ISIS_THEME_COOKIE_NAME = "isis.themeChooser.theme";
/**
* Constructor
*
* @param id component id
*/
public ThemeChooser(String id) {
super(id);
initializeActiveThemeFromCookie();
ListView<String> themesView = new ListView<String>("themes", getThemeNames()) {
@Override
protected void populateItem(ListItem<String> item) {
final String themeName = item.getModelObject();
if (themeName.equals(getActiveThemeProvider().getActiveTheme().name())) {
item.add(AttributeModifier.append("class", "active"));
}
item.add(new AjaxLink<Void>("themeLink") {
// use Ajax link because Link's url looks like /ENTITY:3 and this confuses the browser
@Override
public void onClick(AjaxRequestTarget target) {
setActiveTheme(themeName);
saveActiveThemeToCookie(themeName);
target.add(getPage()); // repaint the whole page
}
}.setBody(Model.of(themeName)));
}
};
add(themesView);
}
private void saveActiveThemeToCookie(String themeName) {
CookieUtils cookieUtils = new CookieUtils();
cookieUtils.save(ISIS_THEME_COOKIE_NAME, themeName);
}
private void initializeActiveThemeFromCookie() {
CookieUtils cookieUtils = new CookieUtils();
String activeTheme = cookieUtils.load(ISIS_THEME_COOKIE_NAME);
if (!Strings.isEmpty(activeTheme)) {
setActiveTheme(activeTheme);
}
}
private void setActiveTheme(String activeTheme) {
IBootstrapSettings bootstrapSettings = Bootstrap.getSettings();
ITheme theme = getThemeByName(activeTheme);
getActiveThemeProvider().setActiveTheme(theme);
if (theme instanceof BootstrapThemeTheme) {
bootstrapSettings.setThemeProvider(new SingleThemeProvider(theme));
} else if (theme instanceof BootswatchTheme) {
bootstrapSettings.setThemeProvider(new BootswatchThemeProvider((BootswatchTheme) theme));
} else if (theme instanceof VegibitTheme) {
bootstrapSettings.setThemeProvider(new VegibitThemeProvider((VegibitTheme) theme));
}
}
private ITheme getThemeByName(String themeName) {
ITheme theme;
try {
if ("bootstrap-theme".equals(themeName)) {
theme = new BootstrapThemeTheme();
} else if (themeName.startsWith("veg")) {
theme = VegibitTheme.valueOf(themeName);
} else {
theme = BootswatchTheme.valueOf(themeName);
}
} catch (Exception x) {
LOG.warn("Cannot find a theme with name '"+themeName+"' in all available theme providers: " + x.getMessage());
// fallback to Bootstrap default theme if the parsing by name failed somehow
theme = new BootstrapThemeTheme();
}
return theme;
}
private ActiveThemeProvider getActiveThemeProvider() {
return Bootstrap.getSettings().getActiveThemeProvider();
}
@Override
protected void onComponentTag(ComponentTag tag) {
super.onComponentTag(tag);
tag.setName("li");
Attributes.addClass(tag, "dropdown");
}
private List<String> getThemeNames() {
final BootstrapThemeTheme bootstrapTheme = new BootstrapThemeTheme();
List<BootswatchTheme> bootswatchThemes = Arrays.asList(BootswatchTheme.values());
// List<VegibitTheme> vegibitThemes = Arrays.asList(VegibitTheme.values());
List<String> allThemes = new ArrayList<>();
allThemes.add(bootstrapTheme.name());
for (ITheme theme : bootswatchThemes) {
allThemes.add(theme.name());
}
// for (ITheme theme : vegibitThemes) {
// allThemes.add(theme.name());
// }
allThemes = filterThemes(allThemes);
return allThemes;
}
/**
* Filters which themes to show in the drop up by using the provided values
* in {@value #ENABLED_THEMES_KEY}
*
* @param allThemes All available themes
* @return A list of all enabled themes
*/
private List<String> filterThemes(List<String> allThemes) {
List<String> enabledThemes;
final String[] enabledThemesArray = getConfiguration().getList(ENABLED_THEMES_KEY);
if (enabledThemesArray.length > 0) {
final HashSet<String> enabledThemesSet = Sets.newHashSet(enabledThemesArray);
Iterable<String> enabled = Iterables.filter(allThemes, new Predicate<String>() {
@Override
public boolean apply(String themeName) {
return enabledThemesSet.contains(themeName);
}
});
enabledThemes = Lists.newArrayList(enabled);
} else {
enabledThemes = allThemes;
}
return enabledThemes;
}
@Override
protected void onConfigure() {
super.onConfigure();
boolean shouldShow = getConfiguration().getBoolean(SHOW_THEME_PICKER_KEY, SHOW_THEME_PICKER_DEFAULT);
setVisible(shouldShow);
}
private IsisConfiguration getConfiguration() {
return IsisContext.getConfiguration();
}
}