gecko-dev/layout/style/nsICSSLoaderObserver.h
Emilio Cobos Álvarez 919bb7ded3 Bug 1571530 - Cleanup slightly SheetComplete, and use the right boolean to notify. r=heycam
This is mostly straight-forward cleanup, but there's a behavior change which
was an oversight from bug 1386840, the regular mObservers stuff didn't pass the
right thing (was passing only mWasAlternate rather than whether it was
deferred).

I think that as a result, only in XML documents (since nsXMLContentSink is the
only thing that adds itself as a global CSS loader observer that ever looks at
this boolean), we may end up breaking this assert:

https://searchfox.org/mozilla-central/rev/9ae20497229225cb3fa729a787791f424ff8087b/dom/base/nsContentSink.cpp#183

(If there are any sheets with non-matching media queries and such).

But I couldn't find a test-case that broke it (tried SVG / XHTML), and in other
documents like pure XML you cannot specify a media query...

Differential Revision: https://phabricator.services.mozilla.com/D41091

--HG--
extra : moz-landing-system : lando
2019-08-16 10:56:16 +00:00

49 lines
1.9 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* internal interface for observing CSS style sheet loads */
#ifndef nsICSSLoaderObserver_h___
#define nsICSSLoaderObserver_h___
#include "nsISupports.h"
#define NS_ICSSLOADEROBSERVER_IID \
{ \
0xf51fbf2c, 0xfe4b, 0x4a15, { \
0xaf, 0x7e, 0x5e, 0x20, 0x64, 0x5f, 0xaf, 0x58 \
} \
}
namespace mozilla {
class StyleSheet;
}
class nsICSSLoaderObserver : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICSSLOADEROBSERVER_IID)
/**
* StyleSheetLoaded is called after aSheet is marked complete and before any
* load events associated with aSheet are fired.
* @param aSheet the sheet that was loaded. Guaranteed to always be
* non-null, even if aStatus indicates failure.
* @param aWasDeferred whether the sheet load was deferred, due to it being an
* alternate sheet, or having a non-matching media list.
* @param aStatus is a success code if the sheet loaded successfully and a
* failure code otherwise. Note that successful load of aSheet
* doesn't indicate anything about whether the data actually parsed
* as CSS, and doesn't indicate anything about the status of any child
* sheets of aSheet.
*/
NS_IMETHOD StyleSheetLoaded(mozilla::StyleSheet* aSheet, bool aWasDeferred,
nsresult aStatus) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsICSSLoaderObserver, NS_ICSSLOADEROBSERVER_IID)
#endif // nsICSSLoaderObserver_h___