PDFPlugin: <embed> and <object> PDFs affect their parent frame's page scale

[Tim Horton]

Detecting whether or not a PDFPlugin is a full-page plugin or not is not as simple as checking isMainFrame(), because <embed> and <object> will cause PDFPlugin to live in the main frame, while still not being full-page. We also have to check that the main frame's document is a PluginDocument, and whether that PluginDocument's PluginWidget is our PDFPlugin's PluginView.

[Tim Horton]

<rdar://problem/12752315>

[Tim Horton]

Created attachment 176083 [details]
patch

[Tim Horton]

Thanks, Dan!

http://trac.webkit.org/changeset/136316

[Darin Adler]

Comment on attachment 176083 [details]
patch

View in context: https://bugs.webkit.org/attachment.cgi?id=176083&action=review

> Source/WebKit2/WebProcess/Plugins/PDF/PDFPlugin.mm:664
> +    Document* document = webFrame()->coreFrame()->document();
> +    if (document->isPluginDocument())
> +        return (static_cast<PluginDocument*>(document)->pluginWidget() == pluginView());
> +
> +    return false;

Normally we do early return for the failure cases, not the main case, so it would be:

    if (!isPluginDocument)
        return false;

    return ......;

Also, the patch has extra parentheses in the return statement that we don’t do.

But I think this reads better with &&:

    return document->isPluginDocument() && static_cast<PluginDocument*>(document)->pluginWidget() == pluginView();

[Tim Horton]

Created attachment 177290 [details]
followup style patch

Oooh, yes, much better. Posting a follow-up patch.

[Tim Horton]

Followup style patch is http://trac.webkit.org/changeset/136422