On Mar 13, 2008, at 4:11 AM, Artem Ananiev wrote:
I work on dispatching web load/progress events for Java port and
have some questions about notifications in FrameLoaderClient class.
1. What is the right method to implement to get a 'page load
started' and 'page load finished' events? I tried the following
methods:
postProgressStartedNotification()
postProgressFinishedNotification()
and the problem is they don't accept any params, so I can't get an
URL being loaded. If I obtain the URL from frame->loader-
>documentLoader, it works for 'progress finished' notification, but
returns an old URL for 'progress started'.
I have no idea what you mean by "page load started" and "finished". If
you look at the Mac port you'll see many different types of calls for
these purposes. The ones you mention above are best for loading
progress, as in a progress bar.
2. What is the right method to implement to get a 'main document
load started'?
dispatchDidStartProvisionalLoad
3. As I understand, the right way to handle resources (for example,
images) loading is to track methods
assignIdentifierToInitialRequest()
dispatchWillSendRequest()
dispatchDidFinishLoading()
The latter two methods provide request identifiers which are
assigned in the former one. However, sometimes I see two
'dispatchWillSendRequest' calls with the same ids and different
URLs. For example, when loading www.google.com I the first URL is www.google.com
and the second is www.google.co.uk. How is this situation should be
handled?
dispatchWillSendRequest will be called repeatedly with different URLs
when a server does redirection. This is normal. How it should be
handled depends on what API you've devised.
4. There are several notifications about resource loading is finished:
dispatchDidFinishLoading()
dispatchDidFinishLoad()
dispatchDidFinishDocumentLoad()
didFinishLoad() - is this a notification?
finishedLoading() - is this a notification?
Some of them provide DocumentLoader instances, others have no
parameters passed. What is the difference between these methods? Are
some of them outdated and shouldn't be used at all?
- dispatchDidFinishLoading(DocumentLoader*, unsigned long identifier)
This is called when done loading an individual resource, such as an
image, script, or the main resource for a page.
- dispatchDidFinishDocumentLoad()
This is called when done loading the document for a frame, usually
HTML, but not all the resources such as images.
- dispatchDidFinishLoad()
This is called when done loading an entire frame and its resources.
Like the HTML load event.
-- Darin
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