[gwt-contrib] Re: Custom element parsers for UiBinder

[ggeorg]

Hi Ray,

Please have a look at:

http://code.google.com/p/google-web-toolkit/issues/detail?id=4461

the attached patch is the simplest patch I could make. It adds support
for adding custom ElementParser(s) to UiBinder by tagging each widgets
that is using a custom parser with the @ElementParserToUse annotation,
e.g.: for GWT Mosaic's LayoutPanel the code is:

@ElementParserToUse(className =
"org.gwt.mosaic.ui.elementparsers.LayoutPanelParser")
public class LayoutPanel extends AbsolutePanel implements
HasLayoutManager,
    HasAnimation {
...
}

----

After applying the patch, the UiBinderWriter.registerParsers() looks
like this:

  private void registerParsers() {
    // TODO(rjrjr): Allow third-party parsers to register themselves
    // automagically

    addElementParser("com.google.gwt.dom.client.Element",
        "com.google.gwt.uibinder.elementparsers.DomElementParser");

    // Register widget parsers.
    addWidgetParser("UIObject");
    addWidgetParser("HasText");
    addWidgetParser("HasHTML");
    addWidgetParser("HasWidgets");
    addWidgetParser("HTMLPanel");
    addWidgetParser("DockPanel");
    addWidgetParser("StackPanel");
    addWidgetParser("DisclosurePanel");
    addWidgetParser("TabPanel");
    addWidgetParser("MenuItem");
    addWidgetParser("MenuBar");
    addWidgetParser("RadioButton");
    addWidgetParser("CellPanel");
    addWidgetParser("CustomButton");
    addWidgetParser("DialogBox");
    addWidgetParser("LayoutPanel");
    addWidgetParser("DockLayoutPanel");
    addWidgetParser("StackLayoutPanel");
    addWidgetParser("TabLayoutPanel");

    // Register custom widget parsers... (almost automagically)

    Collection<OwnerField> uiFields = ownerClass.getUiFields();

    if (uiFields == null) {
      return;
    }

    for (OwnerField uiField : uiFields) {
      JClassType fieldType = uiField.getType().getRawType().isClass();
      String uiClassName = fieldType.getQualifiedSourceName();

      if (elementParsers.containsKey(uiClassName)) {
        continue;
      }

      if (fieldType != null
          && fieldType.isAnnotationPresent(ElementParserToUse.class))
{
        String parserClassName = fieldType.getAnnotation
(ElementParserToUse.class).className();
        if (parserClassName != null && parserClassName.length() > 0) {
          addElementParser(uiClassName, parserClassName);
        }
      }
    }
  }


Kind Regards,
George.


On Jan 7, 12:04 am, Ray Ryan <rj...@google.com> wrote:
> How could I stop you? :-)
>
> Would you making an issue tracker entry about this and putting the patch
> there?

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