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e6314d1382
Much in the spirit of bug 1434474. We right now call MediaFeatureChanges sync or async pretty randomly. This has caused bugs in the past like bug 1413143. Unify media feature changes, and only post them async, and flush them from FlushPendingNotifications. This also fixes a pre-existing problem where style wasn't flushed correctly from getComputedStyle when there were pending media feature values. MozReview-Commit-ID: H9S1M8fk5H4
82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* A struct defining a media feature change. */
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#ifndef mozilla_MediaFeatureChange_h__
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#define mozilla_MediaFeatureChange_h__
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#include "nsChangeHint.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/TypedEnumBits.h"
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namespace mozilla {
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enum class MediaFeatureChangeReason
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{
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// The viewport size the document has used has changed.
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//
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// This affects size media queries like min-width.
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ViewportChange = 1 << 0,
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// The effective text zoom has changed. This affects the meaning of em units,
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// and thus affects any media query that uses a Length.
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ZoomChange = 1 << 1,
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// The base min font size has changed. This can affect the meaning of em
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// units, if the previous default font-size has changed, and also zoom.
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MinFontSizeChange = 1 << 2,
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// The resolution has changed. This can affect device-pixel-ratio media
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// queries, for example.
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ResolutionChange = 1 << 3,
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// The medium has changed.
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MediumChange = 1 << 4,
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// The size-mode has changed.
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SizeModeChange = 1 << 5,
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// A system metric or multiple have changed. This affects all the media
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// features that expose the presence of a system metric directly.
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SystemMetricsChange = 1 << 6,
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// The fact of whether the device size is the page size has changed, thus
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// resolution media queries can change.
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DeviceSizeIsPageSizeChange = 1 << 7,
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// display-mode changed on the document, thus the display-mode media queries
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// may have changed.
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DisplayModeChange = 1 << 8,
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};
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MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(MediaFeatureChangeReason)
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struct MediaFeatureChange
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{
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nsRestyleHint mRestyleHint;
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nsChangeHint mChangeHint;
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MediaFeatureChangeReason mReason;
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MOZ_IMPLICIT MediaFeatureChange(MediaFeatureChangeReason aReason)
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: MediaFeatureChange(nsRestyleHint(0), nsChangeHint(0), aReason)
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{
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}
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MediaFeatureChange(nsRestyleHint aRestyleHint,
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nsChangeHint aChangeHint,
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MediaFeatureChangeReason aReason)
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: mRestyleHint(aRestyleHint)
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, mChangeHint(aChangeHint)
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, mReason(aReason)
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{
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}
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inline MediaFeatureChange& operator|=(const MediaFeatureChange& aOther)
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{
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mRestyleHint |= aOther.mRestyleHint;
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mChangeHint |= aOther.mChangeHint;
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mReason |= aOther.mReason;
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return *this;
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}
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};
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} // namespace mozilla
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#endif
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