Tapestry's Submit component renders out as <input type="submit">. Since
HTML 4.0 a submit button can be written as <button type="submit">. I
prefer this approach, because it makes it easier to distinguish between
real input elements (especially textfields) and buttons. I have created
a JIRA request for this: https://issues.apache.org/jira/browse/TAP5-1545
Hopefully it will get implemented in future Tapestry versions.
In the meanwhile I have helped myself out with a mixin that is able to
change the markup of the element (element name and attributes) it is
attached to. In case someone else finds this usefull this is the code:
import java.util.Collection;
import java.util.List;
import org.apache.tapestry5.BindingConstants;
import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.annotations.AfterRender;
import org.apache.tapestry5.annotations.BeforeRenderTemplate;
import org.apache.tapestry5.annotations.Parameter;
import org.apache.tapestry5.dom.Attribute;
import org.apache.tapestry5.dom.Element;
import org.apache.tapestry5.dom.Node;
/**
* Mixin that changes the markup of an element to desired values.
*/
public final class MarkupChanger {
/**
* The desired new name for the element.
*/
@Parameter(required = true, allowNull = false, defaultPrefix =
BindingConstants.LITERAL)
private String newElemName;
/**
* A string containing pairs of attribute names and values
separated by ",".
*/
@Parameter(allowNull = false, defaultPrefix = BindingConstants.LITERAL)
private String newAttribs;
/**
* The {@link Element} to change the markup.
*/
private Element originalElem;
/**
* In this render phase we can easily get the element that this
mixin is
* placed into by calling writer.getElement.
*
* @param writer
* {@link MarkupWriter} injected by Tapestry.
*/
@BeforeRenderTemplate
final void determineOriginalElem(final MarkupWriter writer ) {
this.originalElem = writer.getElement();
}
/**
* We do all the rewriting of markup in the final phase not to
interfere with
* the render phases of the original element.
*
* @param writer
* {@link MarkupWriter} injected by Tapestry.
*/
@AfterRender
final void changeMarkup(final MarkupWriter writer ) {
// Create a new element with the desired new name.
final Element newElem = writer.element(this.newElemName);
// Add all original attributes to the newly created element.
final Collection<Attribute> attribs =
this.originalElem.getAttributes();
for (final Attribute attrib : attribs) {
newElem.attribute(attrib.getName(), attrib.getValue());
}
// Add new attributes to the new element, possibly overwriting
original ones.
if (this.newAttribs != null && !this.newAttribs.isEmpty()) {
final String[] attribArr = this.newAttribs.split(",");
// parse null-String to null.
for (int i = 0; i < attribArr.length; i++) {
if ("null".equals(attribArr[i])) {
attribArr[i] = null;
}
}
newElem.forceAttributes(attribArr);
}
// Get children from the original element and add them to the
new one.
final List<Node> children = this.originalElem.getChildren();
for (final Node node : children) {
node.moveToBottom(newElem);
}
// End tag for new element.
writer.end();
// Remove the original element from DOM.
this.originalElem.remove();
}
}
Cheers nillehammer
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