[webkit-changes] [WebKit/WebKit] eb8157: Add method for observing web process state via WKW...

[bnham]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: eb81577b89c438828700491a6fd52306b678ac2f
      https://github.com/WebKit/WebKit/commit/eb81577b89c438828700491a6fd52306b678ac2f
  Author: Ben Nham <nham at apple.com>
  Date:   2024-09-25 (Wed, 25 Sep 2024)

  Changed paths:
    M Source/WebKit/UIProcess/API/Cocoa/WKWebView.mm
    M Source/WebKit/UIProcess/API/Cocoa/WKWebViewPrivate.h
    M Source/WebKit/UIProcess/Cocoa/PageClientImplCocoa.h
    M Source/WebKit/UIProcess/Cocoa/PageClientImplCocoa.mm
    M Source/WebKit/UIProcess/PageClient.h
    M Source/WebKit/UIProcess/WebPageProxy.cpp
    M Source/WebKit/UIProcess/WebPageProxy.h
    M Source/WebKit/UIProcess/WebProcessPool.h
    M Source/WebKit/UIProcess/WebProcessProxy.cpp
    M Source/WebKit/UIProcess/WebProcessProxy.h

  Log Message:
  -----------
  Add method for observing web process state via WKWebView
https://bugs.webkit.org/show_bug.cgi?id=280355
rdar://136707641

Reviewed by Brady Eidson.

For debugging purposes, it can be useful for the embedder to be able to observe process state
changes. For instance, the embedder might use this to add debug info to the tab title to let a user
quickly know if a tab is associated with a process that is in the foreground, background, or
suspended.

I did this by adding a `_webProcessState` property to WKWebView. The property is KVO-compliant. To
avoid perf issues, we only start shipping process state updates back to the embedder if the embedder
actually registers for KVO notifications on that property.

* Source/WebKit/UIProcess/API/Cocoa/WKWebView.mm:
(-[WKWebView addObserver:forKeyPath:options:context:]):
(-[WKWebView _webProcessState]):
* Source/WebKit/UIProcess/API/Cocoa/WKWebViewPrivate.h:
* Source/WebKit/UIProcess/Cocoa/PageClientImplCocoa.h:
* Source/WebKit/UIProcess/Cocoa/PageClientImplCocoa.mm:
(WebKit::PageClientImplCocoa::processDidUpdateThrottleState):
* Source/WebKit/UIProcess/PageClient.h:
(WebKit::PageClient::processDidUpdateThrottleState):
* Source/WebKit/UIProcess/WebPageProxy.cpp:
(WebKit::WebPageProxy::processDidUpdateThrottleState):
* Source/WebKit/UIProcess/WebPageProxy.h:
* Source/WebKit/UIProcess/WebProcessPool.h:
* Source/WebKit/UIProcess/WebProcessProxy.cpp:
(WebKit::WebProcessProxy::updateRuntimeStatistics):
* Source/WebKit/UIProcess/WebProcessProxy.h:

Canonical link: https://commits.webkit.org/284261@main



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