I think I've done this differently on every project and every way has turned
out wrong. The way I do it now is objects in the environment. The great
thing about this way is you can set defaults for the entire site, override
them depending on development/production and override it at any point in the
page render cycle. For example the defaults are set this way in AppModule.
@Contribute(EnvironmentSetup.class)
public static void provideEnvironmentSetup(MappedConfiguration<Class,
Object> configuration) {
configuration.add(FrameworkEnvironment.class, new
FrameworkValues(null).withName("tb"));
configuration.add(ButtonEnvironment.class, new
ButtonValues(null));
configuration.add(FormEnvironment.class, new FormValues(null));
configuration.add(NavEnvironment.class, new NavValues(null));
configuration.add(TableEnvironment.class, new
TableValues(null));
}
To override them
@Contribute(EnvironmentSetup.class)
public static void provideEnvironmentSetup(MappedConfiguration<Class,
Object> configuration) {
configuration.override(TableEnvironment.class, new
TableValues(null).withType("table"));
configuration.override(FormEnvironment.class, new
FormValues(null).withType("form-horizontal"));
}
You'll need to set then in a markup filter
public void
contributeMarkupRenderer(OrderedConfiguration<MarkupRendererFilter>
configuration,
final Logger logger,
final EnvironmentSetup environmentSetup,
final Environment environment,
final JavaScriptSupport javaScriptSupport,
final ExcludeVisitor excludeVistior,
@InjectService(BootstrapVisitor.id) final
FrameworkVisitor
frameworkVisitor,
@InjectService("FrameworkProvider") final
FrameworkProvider
frameworkProvider) {
MarkupRendererFilter bootstrapFilter = new
MarkupRendererFilter() {
public void renderMarkup(MarkupWriter writer,
MarkupRenderer renderer) {
environmentSetup.push(); // push all the
defaults
renderer.renderMarkup(writer);
environmentSetup.pop(); // pop them after the
render
Don't forget
public void
contributePartialMarkupRenderer(OrderedConfiguration<PartialMarkupRendererFilter>
configuration,
Here is the service to push/pop them
@SuppressWarnings("rawtypes")
public class EnvironmentSetupImpl implements EnvironmentSetup {
private final Map<Class,Object> setup;
private final Environment environment;
public EnvironmentSetupImpl(Map<Class,Object> setup, Logger logger,
Environment environment) {
this.setup = setup;
this.environment = environment;
}
@SuppressWarnings("unchecked")
public void push() {
for ( Entry<Class, Object> entry : setup.entrySet() ) {
environment.push(entry.getKey(), entry.getValue());
}
}
@SuppressWarnings("unchecked")
public void pop() {
for ( Entry<Class, Object> entry : setup.entrySet() ) {
environment.pop(entry.getKey());
}
}
}
Now you can access them in pages/components/services. Plus by pushing new
ones you can override them at any point in the render cycle. I make the
constructor take the current one so you can chain them like this
environment.push(TableEnvironment.class, new
TableValues(environment.peekRequired(TableEnvironment.class)).withType("table-bordered"));
public class TableValues implements TableEnvironment {
private String type;
private boolean isInstrumented;
private String sortElement = "i";
private String[] sortElementAttributes = {"class","icon-random"};
private String prefix = "table";
public TableValues(TableEnvironment values) {
if ( values != null ) {
type = values.getType(null);
sortElement = values.getSortElement();
sortElementAttributes =
values.getSortElementAttributes();
}
}
Finally I created an EnvironmentBinding so you can do this
${env:InterfaceName.property}
https://github.com/trsvax/tapestry-bootstrap/blob/master/src/main/java/com/trsvax/bootstrap/services/EnvironmentBindingFactory.java
While this might seem like a lot of code it's all pretty straight forward
and can be implemented as a module so you can just drop it into any project.
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