Michael Gratton writes on June 23, 2018 8:22:
On Thu, Jun 21, 2018 at 11:47 PM, Gaute Hope <[email protected]> wrote:Do you have any suggestions for how I could design or circumvent this?Everything involving I/O that needs to be done on the main loop should be done asynchronously. That's precisely why GLib-based libs have such good support for async operations: To avoid blocking the GUI.In particular for WebKitGTK, if the data you need to exchange between the GUI process and WebExtension can be trivially formatted and re-parsed (GVariant helps a lot with that), then consider using webkit_web_view_run_javascript() instead of your own custom protobuf IPC.If the data you need to load from the GUI process is large enough, maybe consider registering a custom URI scheme handler using webkit_web_context_register_uri_scheme(), then let WebKitGTK handle getting the data to the WebProcess asynchronously for you.If neither of those are a good fit, write an async protobuf wrapper using a background thread, so that when it blocks, it doesn't block the GUI as well.Geary uses the first two of these approaches with WebKitGTK, and the last approach for interacting asynchronously with SQLite, and they all work quite well.
Hi Mike,thanks for your answer. As you might have noticed I have found a lot of inspiration in Geary when it comes to message rendering - thanks! I noticed that I could use the set_inner_html() on the body from iframe_get_content_document() without generating a request. This solves my problem.
The necessicity to do all DOM manipulation on the main WE-thread (sync'ed) and the interactivity between the webpage and the GUI allows my design to become a lot simpler if I can do sync'ed requests between my GUI thread and the WE-thread. Async-options would require me to keep blocking user-events and making my GUI inactive when I am waiting for a request to finish. I was hoping to avoid this since it would be really hard to reliably guard against this. Especially since external events / timers also need to be blocked untill the request is done. The last option is what I am doing now (I just choose to do most things sync'ed).
- gaute
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