Option #2 looks promising. I will try it! Thanks.
On Aug 18, 2011, at 4:22 PM, Robert Zeigler <robert.zeig...@roxanemy.com> wrote:
> If GWT is generating the scripts directory, why doesn't it know the
> directory? Or are you telling it the directory to use?
>
> In any event, I can think of a couple of possibilities. Basically, the
> problem is that you don't know the value of the directory until render time,
> but Tapestry puts all libraries to be imported into the document head, and
> all code to be executed (such as a variable declaration) occurs after page
> load (which is after loading the gwtSupport.js script).
>
> Option #1 (gross, btw, but it would get the job done):
> * Remove the @Import
> * @Inject JavaScriptSupport jsSupport;
> * In one of the render phase methods, generate the required value and write
> it to a file (eg: in the context).
> * jsSupport.includeJavaScriptLibrary("your generated file");
> * jsSupport.includeJavaScriptLibrary("context:js/gwtSupport.js");
>
> Option #2 (not as gross; still smells, but should work):
> * Leave the import in place
> * After render:
> void afterRender(MarkupWriter writer) {
> //find the gwt script:
> Element gwtScript;
> for(Node n : writer.getDocument().find("html/head").getChildren()) {
> if (!(n instanceof Element)) continue;
> Element el = (Element) n;
> if ("script".equals(el.getName()) && el.getAttribute("src") !=
> null && el.getAttribute("src").contains("gwtSupport.js")) {
> gwtScript = el;
> break;
> }
> }
> if (gwtScript == null)
> throw new RuntimeException("Couldn't find gwtSupport script!");
>
> Element myScript =
> getDocument().find("html/head").element("script","type","text/javascript");
> myScript.text("var myvar=" + myGeneratedValue);
> myScript.moveBefore(gwtScript);
> }
>
> In option 2, you're leveraging the fact that Tapestry renders a DOM tree on
> the server to find the gwtScript element in the document head and insert your
> custom script (with variable declaration) before it.
>
> Neither option is very pretty, but both should work.
>
>
> Robert
>
> On Aug 18, 2011, at 8/183:37 PM , Lenny Primak wrote:
>
>> Its a path to the GWT-generated scripts directory. Basically, there can be
>> many GWT modules, but supporting scripts are the same,
>> even though they are duplicated in different paths, so any path will do, but
>> there has to be one, just dynamically generated from
>> any of the available components.
>>
>> Thanks for your help!
>>
>> On Aug 18, 2011, at 3:34 PM, Robert Zeigler wrote:
>>
>>> Hm. Can you speak more to what the generated value is supposed to be/do?
>>> It appears that it doesn't matter /too/ much what it is since it doesn't
>>> matter if multiple component instances overwrite the value?
>>>
>>> Robert
>>>
>>> On Aug 18, 2011, at 8/183:24 PM , Lenny Primak wrote:
>>>
>>>> The variable's value is dynamically generated by the component that is
>>>> importing the library.
>>>> If there are multiple component, any component instance should win, and
>>>> that's ok.
>>>>
>>>>
>>>> On Aug 18, 2011, at 3:22 PM, Robert Zeigler wrote:
>>>>
>>>>> What if you include a bit of custom js in a separate file that defines
>>>>> the variable?
>>>>>
>>>>> component.js:
>>>>> var somevar="someval";
>>>>>
>>>>> Then:
>>>>>
>>>>> @Import(library={"component.js","context:js/gwtSupport.js"})
>>>>> public class GwtSupport{...}
>>>>>
>>>>> Pretty sure that the order of the libraries in your @Import will be
>>>>> honored in the import declarations on the page (but I don't remember
>>>>> offhand).
>>>>>
>>>>> Robert
>>>>>
>>>>> On Aug 18, 2011, at 8/183:14 PM , Lenny Primak wrote:
>>>>>
>>>>>> I have a component like this:
>>>>>>
>>>>>> @Import(library="context:js/gwtSupport.js")
>>>>>> public class GwtSupport
>>>>>> {
>>>>>> // intentionally left blank
>>>>>> }
>>>>>>
>>>>>>
>>>>>> gwtSupport.js (actually the GWT component itself which I have no control
>>>>>> over)
>>>>>> is trying to read a variable.
>>>>>>
>>>>>> I wasn't able to figure out a way to set it before gwtSupport.js gets
>>>>>> included.
>>>>>>
>>>>>> I tried addInitializerCall, addScript, etc. but they all come after
>>>>>> gwtSupport.js is included.
>>>>>>
>>>>>> What am I missing?
>>>>>>
>>>>>>
>>>>>>
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