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/* -*- 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/. */
#ifndef mozilla_css_StylePreloadKind_h
#define mozilla_css_StylePreloadKind_h
#include <stdint.h>
namespace mozilla::css {
enum class StylePreloadKind : uint8_t {
// Not a preload.
None,
// An speculative load from the parser for a <link rel="stylesheet"> or
// @import stylesheet.
FromParser,
// A preload (speculative or not) for a <link rel="preload" as="style">
// element.
FromLinkRelPreloadElement,
// A preload for a "Link" rel=preload response header.
FromLinkRelPreloadHeader,
// A preload from an early-hints header.
FromEarlyHintsHeader,
};
inline bool IsLinkRelPreloadOrEarlyHint(StylePreloadKind aKind) {
return aKind == StylePreloadKind::FromLinkRelPreloadElement ||
aKind == StylePreloadKind::FromLinkRelPreloadHeader ||
aKind == StylePreloadKind::FromEarlyHintsHeader;
}
inline bool ShouldAssumeStandardsMode(StylePreloadKind aKind) {
switch (aKind) {
case StylePreloadKind::FromLinkRelPreloadHeader:
case StylePreloadKind::FromEarlyHintsHeader:
// For header preloads we guess non-quirks, because otherwise it is
// useless for modern pages.
//
// Link element preload is generally good because the speculative html
// parser deals with quirks mode properly.
return true;
case StylePreloadKind::None:
case StylePreloadKind::FromParser:
case StylePreloadKind::FromLinkRelPreloadElement:
break;
}
return false;
}
} // namespace mozilla::css
#endif // mozilla_css_StylePreloadKind_h
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