Open Radar

 
Summary: 

A WebView displayed by a WebPluginView that is itself displayed in a WebView does not process any interactive page elements that are driven by mouse-moved events.

This means that CSS :hover rules are never executed, and no JavaScript onmouseover events are ever fired.

All the static stuff works: CSS styling is applied correctly, and JavaScript onclick handlers execute as expected. Interestingly, the onmouseovers also execute as soon as I click in the corresponding element. It's just the mouse-moved stuff that does not work, it looks like the webview never gets any mouseMoved: events.


Steps to Reproduce:

check out the test project from

    http://github.com/liyanage/webplugin-with-webview-tester

build and run with these commands:

    xcodebuild -target Tester
    open build/Release/Tester.app

(note that this will install the test .webplugin into your ~/Library/Internet Plugins)

The test app opens with a web view showing an HTML page with some interactive elements. The page also has an <object> tag that loads a file with the special extension that triggers the web plugin. The plugin itself consists of a WebView and this WebView is again filled with a HTML page that has the same interactive elements as the page hosting the <object>.

Expected Results:

I expect the interactive elements in both the "outer" and the "inner" HTML pages to work the same.

Actual Results:

The inner web view doesn't process anything that is mouse-moved event-related.

Regression:

Always occurs.

Notes:

See additional information in this mailing list thread:

http://lists.apple.com/archives/Webkitsdk-dev/2009/Mar/msg00016.html