mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
6808a1e824
Without the change to ensure that valuePortion is nonnegative, duration might become negative, which it's not allowed to be. Without this change, this can happen when a transition starts off moving into negative value space, which happens when y1 in the timing function is negative. The result that we want should come from using the absolute value (rather than clamping to zero): if we reverse the transition when it's in this negative space, we want the same movement we'd get if it were the same distance into positive value space, just in the opposite direction. Additionally, I'm clamping valuePortion to be at most 1. This affects "bouncy" transitions where the timing function's y2 is greater than one. This is less critical, but ensures the invariant that a transition will never take longer than its specified time, which seems like a good thing to ensure. I believe doing this computation at this stage is preferable to doing it before the multiplication by oldPT.mReversePortion, since we should be clamping the value within the range of the complete transition, not just relative to the most recent reverse.
1027 lines
36 KiB
C++
1027 lines
36 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is nsTransitionManager.
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*
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* The Initial Developer of the Original Code is the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2009
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation (original author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* Code to start and animate CSS transitions. */
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#include "nsTransitionManager.h"
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#include "nsIContent.h"
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#include "nsStyleContext.h"
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#include "nsCSSProps.h"
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#include "mozilla/TimeStamp.h"
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#include "nsRefreshDriver.h"
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#include "nsRuleProcessorData.h"
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#include "nsIStyleRule.h"
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#include "nsRuleWalker.h"
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#include "nsRuleData.h"
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#include "nsSMILKeySpline.h"
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#include "gfxColor.h"
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#include "nsCSSPropertySet.h"
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#include "nsStyleAnimation.h"
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#include "nsEventDispatcher.h"
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#include "nsGUIEvent.h"
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#include "mozilla/dom/Element.h"
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using mozilla::TimeStamp;
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using mozilla::TimeDuration;
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namespace dom = mozilla::dom;
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/*****************************************************************************
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* Per-Element data *
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*****************************************************************************/
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struct ElementPropertyTransition
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{
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nsCSSProperty mProperty;
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nsStyleAnimation::Value mStartValue, mEndValue;
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TimeStamp mStartTime; // actual start plus transition delay
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// data from the relevant nsTransition
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TimeDuration mDuration;
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nsSMILKeySpline mTimingFunction;
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// This is the start value to be used for a check for whether a
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// transition is being reversed. Normally the same as mStartValue,
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// except when this transition started as the reversal of another
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// in-progress transition. Needed so we can handle two reverses in a
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// row.
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nsStyleAnimation::Value mStartForReversingTest;
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// Likewise, the portion (in value space) of the "full" reversed
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// transition that we're actually covering. For example, if a :hover
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// effect has a transition that moves the element 10px to the right
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// (by changing 'left' from 0px to 10px), and the mouse moves in to
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// the element (starting the transition) but then moves out after the
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// transition has advanced 4px, the second transition (from 10px/4px
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// to 0px) will have mReversePortion of 0.4. (If the mouse then moves
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// in again when the transition is back to 2px, the mReversePortion
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// for the third transition (from 0px/2px to 10px) will be 0.8.
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double mReversePortion;
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// Compute the portion of the *value* space that we should be through
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// at the given time. (The input to the transition timing function
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// has time units, the output has value units.)
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double ValuePortionFor(TimeStamp aRefreshTime) const;
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PRBool IsRemovedSentinel() const
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{
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return mStartTime.IsNull();
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}
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void SetRemovedSentinel()
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{
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// assign the null time stamp
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mStartTime = TimeStamp();
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}
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};
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double
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ElementPropertyTransition::ValuePortionFor(TimeStamp aRefreshTime) const
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{
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// Set |timePortion| to the portion of the way we are through the time
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// input to the transition's timing function (always within the range
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// 0-1).
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double duration = mDuration.ToSeconds();
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NS_ABORT_IF_FALSE(duration >= 0.0, "negative duration forbidden");
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double timePortion;
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if (duration == 0.0) {
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// When duration is zero, we can still have a transition when delay
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// is nonzero. mStartTime already incorporates delay.
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if (aRefreshTime >= mStartTime) {
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timePortion = 0.0;
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} else {
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timePortion = 1.0;
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}
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} else {
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timePortion = (aRefreshTime - mStartTime).ToSeconds() / duration;
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if (timePortion < 0.0)
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timePortion = 0.0; // use start value during transition-delay
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if (timePortion > 1.0)
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timePortion = 1.0; // we might be behind on flushing
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}
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return mTimingFunction.GetSplineValue(timePortion);
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}
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/**
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* A style rule that maps property-nsStyleAnimation::Value pairs.
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*/
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class AnimValuesStyleRule : public nsIStyleRule
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{
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public:
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// nsISupports implementation
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NS_DECL_ISUPPORTS
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// nsIStyleRule implementation
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virtual void MapRuleInfoInto(nsRuleData* aRuleData);
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#ifdef DEBUG
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virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
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#endif
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void AddValue(nsCSSProperty aProperty, nsStyleAnimation::Value &aStartValue)
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{
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PropertyValuePair v = { aProperty, aStartValue };
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mPropertyValuePairs.AppendElement(v);
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}
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// Caller must fill in returned value, when non-null.
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nsStyleAnimation::Value* AddEmptyValue(nsCSSProperty aProperty)
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{
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PropertyValuePair *p = mPropertyValuePairs.AppendElement();
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if (!p) {
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return nsnull;
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}
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p->mProperty = aProperty;
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return &p->mValue;
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}
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struct PropertyValuePair {
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nsCSSProperty mProperty;
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nsStyleAnimation::Value mValue;
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};
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private:
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nsTArray<PropertyValuePair> mPropertyValuePairs;
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};
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struct ElementTransitions : public PRCList
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{
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ElementTransitions(dom::Element *aElement, nsIAtom *aElementProperty,
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nsTransitionManager *aTransitionManager)
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: mElement(aElement)
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, mElementProperty(aElementProperty)
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, mTransitionManager(aTransitionManager)
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{
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PR_INIT_CLIST(this);
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}
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~ElementTransitions()
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{
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PR_REMOVE_LINK(this);
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mTransitionManager->TransitionsRemoved();
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}
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void Destroy()
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{
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// This will call our destructor.
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mElement->DeleteProperty(mElementProperty);
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}
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void EnsureStyleRuleFor(TimeStamp aRefreshTime);
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// Either zero or one for each CSS property:
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nsTArray<ElementPropertyTransition> mPropertyTransitions;
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// This style rule overrides style data with the currently
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// transitioning value for an element that is executing a transition.
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// It only matches when styling with animation. When we style without
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// animation, we need to not use it so that we can detect any new
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// changes; if necessary we restyle immediately afterwards with
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// animation.
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nsRefPtr<AnimValuesStyleRule> mStyleRule;
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// The refresh time associated with mStyleRule.
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TimeStamp mStyleRuleRefreshTime;
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dom::Element *mElement;
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// the atom we use in mElement's prop table (must be a static atom,
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// i.e., in an atom list)
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nsIAtom *mElementProperty;
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nsTransitionManager *mTransitionManager;
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};
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static void
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ElementTransitionsPropertyDtor(void *aObject,
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nsIAtom *aPropertyName,
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void *aPropertyValue,
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void *aData)
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{
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ElementTransitions *et = static_cast<ElementTransitions*>(aPropertyValue);
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delete et;
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}
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void
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ElementTransitions::EnsureStyleRuleFor(TimeStamp aRefreshTime)
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{
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if (!mStyleRule || mStyleRuleRefreshTime != aRefreshTime) {
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mStyleRule = new AnimValuesStyleRule();
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mStyleRuleRefreshTime = aRefreshTime;
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for (PRUint32 i = 0, i_end = mPropertyTransitions.Length(); i < i_end; ++i)
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{
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ElementPropertyTransition &pt = mPropertyTransitions[i];
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if (pt.IsRemovedSentinel()) {
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continue;
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}
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nsStyleAnimation::Value *val = mStyleRule->AddEmptyValue(pt.mProperty);
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if (!val) {
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continue;
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}
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double valuePortion = pt.ValuePortionFor(aRefreshTime);
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#ifdef DEBUG
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PRBool ok =
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#endif
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nsStyleAnimation::Interpolate(pt.mProperty,
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pt.mStartValue, pt.mEndValue,
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valuePortion, *val);
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NS_ABORT_IF_FALSE(ok, "could not interpolate values");
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}
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}
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}
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NS_IMPL_ISUPPORTS1(AnimValuesStyleRule, nsIStyleRule)
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/* virtual */ void
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AnimValuesStyleRule::MapRuleInfoInto(nsRuleData* aRuleData)
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{
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nsStyleContext *contextParent = aRuleData->mStyleContext->GetParent();
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if (contextParent && contextParent->HasPseudoElementData()) {
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// Don't apply transitions to things inside of pseudo-elements.
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// FIXME (Bug 522599): Add tests for this.
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return;
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}
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for (PRUint32 i = 0, i_end = mPropertyValuePairs.Length(); i < i_end; ++i) {
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PropertyValuePair &cv = mPropertyValuePairs[i];
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if (aRuleData->mSIDs & nsCachedStyleData::GetBitForSID(
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nsCSSProps::kSIDTable[cv.mProperty]))
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{
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nsCSSValue *prop = aRuleData->ValueFor(cv.mProperty);
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if (prop->GetUnit() == eCSSUnit_Null) {
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#ifdef DEBUG
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PRBool ok =
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#endif
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nsStyleAnimation::UncomputeValue(cv.mProperty,
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aRuleData->mPresContext,
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cv.mValue, *prop);
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NS_ABORT_IF_FALSE(ok, "could not store computed value");
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}
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}
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}
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}
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#ifdef DEBUG
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/* virtual */ void
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AnimValuesStyleRule::List(FILE* out, PRInt32 aIndent) const
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{
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// WRITE ME?
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}
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#endif
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/*****************************************************************************
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* nsTransitionManager *
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*****************************************************************************/
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nsTransitionManager::nsTransitionManager(nsPresContext *aPresContext)
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: mPresContext(aPresContext)
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{
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PR_INIT_CLIST(&mElementTransitions);
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}
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nsTransitionManager::~nsTransitionManager()
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{
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NS_ABORT_IF_FALSE(!mPresContext, "Disconnect should have been called");
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}
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void
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nsTransitionManager::Disconnect()
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{
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// Content nodes might outlive the transition manager.
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RemoveAllTransitions();
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mPresContext = nsnull;
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}
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void
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nsTransitionManager::RemoveAllTransitions()
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{
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while (!PR_CLIST_IS_EMPTY(&mElementTransitions)) {
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ElementTransitions *head = static_cast<ElementTransitions*>(
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PR_LIST_HEAD(&mElementTransitions));
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head->Destroy();
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}
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}
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static PRBool
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TransExtractComputedValue(nsCSSProperty aProperty,
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nsStyleContext* aStyleContext,
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nsStyleAnimation::Value& aComputedValue)
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{
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PRBool result =
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nsStyleAnimation::ExtractComputedValue(aProperty, aStyleContext,
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aComputedValue);
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if (aProperty == eCSSProperty_visibility) {
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NS_ABORT_IF_FALSE(aComputedValue.GetUnit() ==
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nsStyleAnimation::eUnit_Enumerated,
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"unexpected unit");
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aComputedValue.SetIntValue(aComputedValue.GetIntValue(),
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nsStyleAnimation::eUnit_Visibility);
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}
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return result;
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}
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already_AddRefed<nsIStyleRule>
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nsTransitionManager::StyleContextChanged(dom::Element *aElement,
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nsStyleContext *aOldStyleContext,
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nsStyleContext *aNewStyleContext)
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{
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NS_PRECONDITION(aOldStyleContext->GetPseudo() ==
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aNewStyleContext->GetPseudo(),
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"pseudo type mismatch");
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// If we were called from ReparentStyleContext, this assertion would
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// actually fire. If we need to be called from there, we can probably
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// just remove it; the condition probably isn't critical, although
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// it's worth thinking about some more.
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NS_PRECONDITION(aOldStyleContext->HasPseudoElementData() ==
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aNewStyleContext->HasPseudoElementData(),
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"pseudo type mismatch");
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// NOTE: Things in this function (and ConsiderStartingTransition)
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// should never call PeekStyleData because we don't preserve gotten
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// structs across reframes.
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// Return sooner (before the startedAny check below) for the most
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// common case: no transitions specified or running.
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const nsStyleDisplay *disp = aNewStyleContext->GetStyleDisplay();
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nsCSSPseudoElements::Type pseudoType = aNewStyleContext->GetPseudoType();
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if (pseudoType != nsCSSPseudoElements::ePseudo_NotPseudoElement) {
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if (pseudoType != nsCSSPseudoElements::ePseudo_before &&
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pseudoType != nsCSSPseudoElements::ePseudo_after) {
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return nsnull;
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}
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NS_ASSERTION((pseudoType == nsCSSPseudoElements::ePseudo_before &&
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aElement->Tag() == nsGkAtoms::mozgeneratedcontentbefore) ||
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(pseudoType == nsCSSPseudoElements::ePseudo_after &&
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aElement->Tag() == nsGkAtoms::mozgeneratedcontentafter),
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"Unexpected aElement coming through");
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// Else the element we want to use from now on is the element the
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// :before or :after is attached to.
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aElement = aElement->GetParent()->AsElement();
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}
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ElementTransitions *et =
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GetElementTransitions(aElement, pseudoType, PR_FALSE);
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if (!et &&
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disp->mTransitionPropertyCount == 1 &&
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disp->mTransitions[0].GetDelay() == 0.0f &&
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disp->mTransitions[0].GetDuration() == 0.0f) {
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return nsnull;
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}
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if (aNewStyleContext->PresContext()->IsProcessingAnimationStyleChange()) {
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return nsnull;
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}
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|
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if (aNewStyleContext->GetParent() &&
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aNewStyleContext->GetParent()->HasPseudoElementData()) {
|
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// Ignore transitions on things that inherit properties from
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// pseudo-elements.
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// FIXME (Bug 522599): Add tests for this.
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return nsnull;
|
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}
|
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|
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// Per http://lists.w3.org/Archives/Public/www-style/2009Aug/0109.html
|
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// I'll consider only the transitions from the number of items in
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// 'transition-property' on down, and later ones will override earlier
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// ones (tracked using |whichStarted|).
|
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PRBool startedAny = PR_FALSE;
|
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nsCSSPropertySet whichStarted;
|
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for (PRUint32 i = disp->mTransitionPropertyCount; i-- != 0; ) {
|
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const nsTransition& t = disp->mTransitions[i];
|
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// Check delay and duration first, since they default to zero, and
|
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// when they're both zero, we can ignore the transition.
|
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if (t.GetDelay() != 0.0f || t.GetDuration() != 0.0f) {
|
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// We might have something to transition. See if any of the
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// properties in question changed and are animatable.
|
|
// FIXME: Would be good to find a way to share code between this
|
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// interpretation of transition-property and the one below.
|
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nsCSSProperty property = t.GetProperty();
|
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if (property == eCSSPropertyExtra_no_properties ||
|
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property == eCSSProperty_UNKNOWN) {
|
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// Nothing to do, but need to exclude this from cases below.
|
|
} else if (property == eCSSPropertyExtra_all_properties) {
|
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for (nsCSSProperty p = nsCSSProperty(0);
|
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p < eCSSProperty_COUNT_no_shorthands;
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p = nsCSSProperty(p + 1)) {
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ConsiderStartingTransition(p, t, aElement, et,
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aOldStyleContext, aNewStyleContext,
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&startedAny, &whichStarted);
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}
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} else if (nsCSSProps::IsShorthand(property)) {
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CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(subprop, property) {
|
|
ConsiderStartingTransition(*subprop, t, aElement, et,
|
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aOldStyleContext, aNewStyleContext,
|
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&startedAny, &whichStarted);
|
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}
|
|
} else {
|
|
ConsiderStartingTransition(property, t, aElement, et,
|
|
aOldStyleContext, aNewStyleContext,
|
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&startedAny, &whichStarted);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Stop any transitions for properties that are no longer in
|
|
// 'transition-property'.
|
|
// Also stop any transitions for properties that just changed (and are
|
|
// still in the set of properties to transition), but we didn't just
|
|
// start the transition because delay and duration are both zero.
|
|
if (et) {
|
|
PRBool checkProperties =
|
|
disp->mTransitions[0].GetProperty() != eCSSPropertyExtra_all_properties;
|
|
nsCSSPropertySet allTransitionProperties;
|
|
if (checkProperties) {
|
|
for (PRUint32 i = disp->mTransitionPropertyCount; i-- != 0; ) {
|
|
const nsTransition& t = disp->mTransitions[i];
|
|
// FIXME: Would be good to find a way to share code between this
|
|
// interpretation of transition-property and the one above.
|
|
nsCSSProperty property = t.GetProperty();
|
|
if (property == eCSSPropertyExtra_no_properties ||
|
|
property == eCSSProperty_UNKNOWN) {
|
|
// Nothing to do, but need to exclude this from cases below.
|
|
} else if (property == eCSSPropertyExtra_all_properties) {
|
|
for (nsCSSProperty p = nsCSSProperty(0);
|
|
p < eCSSProperty_COUNT_no_shorthands;
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|
p = nsCSSProperty(p + 1)) {
|
|
allTransitionProperties.AddProperty(p);
|
|
}
|
|
} else if (nsCSSProps::IsShorthand(property)) {
|
|
CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(subprop, property) {
|
|
allTransitionProperties.AddProperty(*subprop);
|
|
}
|
|
} else {
|
|
allTransitionProperties.AddProperty(property);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsTArray<ElementPropertyTransition> &pts = et->mPropertyTransitions;
|
|
PRUint32 i = pts.Length();
|
|
NS_ABORT_IF_FALSE(i != 0, "empty transitions list?");
|
|
nsStyleAnimation::Value currentValue;
|
|
do {
|
|
--i;
|
|
ElementPropertyTransition &pt = pts[i];
|
|
// properties no longer in 'transition-property'
|
|
if ((checkProperties &&
|
|
!allTransitionProperties.HasProperty(pt.mProperty)) ||
|
|
// properties whose computed values changed but delay and
|
|
// duration are both zero
|
|
!TransExtractComputedValue(pt.mProperty, aNewStyleContext,
|
|
currentValue) ||
|
|
currentValue != pt.mEndValue) {
|
|
// stop the transition
|
|
pts.RemoveElementAt(i);
|
|
}
|
|
} while (i != 0);
|
|
|
|
if (pts.IsEmpty()) {
|
|
et->Destroy();
|
|
et = nsnull;
|
|
}
|
|
}
|
|
|
|
if (!startedAny) {
|
|
return nsnull;
|
|
}
|
|
|
|
NS_ABORT_IF_FALSE(et, "must have element transitions if we started "
|
|
"any transitions");
|
|
|
|
// In the CSS working group discussion (2009 Jul 15 telecon,
|
|
// http://www.w3.org/mid/4A5E1470.4030904@inkedblade.net ) of
|
|
// http://lists.w3.org/Archives/Public/www-style/2009Jun/0121.html ,
|
|
// the working group decided that a transition property on an
|
|
// element should not cause any transitions if the property change
|
|
// is itself inheriting a value that is transitioning on an
|
|
// ancestor. So, to get the correct behavior, we continue the
|
|
// restyle that caused this transition using a "covering" rule that
|
|
// covers up any changes on which we started transitions, so that
|
|
// descendants don't start their own transitions. (In the case of
|
|
// negative transition delay, this covering rule produces different
|
|
// results than applying the transition rule immediately would).
|
|
// Our caller is responsible for restyling again using this covering
|
|
// rule.
|
|
|
|
nsRefPtr<AnimValuesStyleRule> coverRule = new AnimValuesStyleRule;
|
|
if (!coverRule) {
|
|
NS_WARNING("out of memory");
|
|
return nsnull;
|
|
}
|
|
|
|
nsTArray<ElementPropertyTransition> &pts = et->mPropertyTransitions;
|
|
for (PRUint32 i = 0, i_end = pts.Length(); i < i_end; ++i) {
|
|
ElementPropertyTransition &pt = pts[i];
|
|
if (whichStarted.HasProperty(pt.mProperty)) {
|
|
coverRule->AddValue(pt.mProperty, pt.mStartValue);
|
|
}
|
|
}
|
|
|
|
return coverRule.forget();
|
|
}
|
|
|
|
void
|
|
nsTransitionManager::ConsiderStartingTransition(nsCSSProperty aProperty,
|
|
const nsTransition& aTransition,
|
|
dom::Element *aElement,
|
|
ElementTransitions *&aElementTransitions,
|
|
nsStyleContext *aOldStyleContext,
|
|
nsStyleContext *aNewStyleContext,
|
|
PRBool *aStartedAny,
|
|
nsCSSPropertySet *aWhichStarted)
|
|
{
|
|
// IsShorthand itself will assert if aProperty is not a property.
|
|
NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(aProperty),
|
|
"property out of range");
|
|
|
|
if (aWhichStarted->HasProperty(aProperty)) {
|
|
// A later item in transition-property already started a
|
|
// transition for this property, so we ignore this one.
|
|
// See comment above and
|
|
// http://lists.w3.org/Archives/Public/www-style/2009Aug/0109.html .
|
|
return;
|
|
}
|
|
|
|
if (nsCSSProps::kAnimTypeTable[aProperty] == eStyleAnimType_None) {
|
|
return;
|
|
}
|
|
|
|
ElementPropertyTransition pt;
|
|
nsStyleAnimation::Value dummyValue;
|
|
PRBool shouldAnimate =
|
|
TransExtractComputedValue(aProperty, aOldStyleContext, pt.mStartValue) &&
|
|
TransExtractComputedValue(aProperty, aNewStyleContext, pt.mEndValue) &&
|
|
pt.mStartValue != pt.mEndValue &&
|
|
// Check that we can interpolate between these values
|
|
// (If this is ever a performance problem, we could add a
|
|
// CanInterpolate method, but it seems fine for now.)
|
|
nsStyleAnimation::Interpolate(aProperty, pt.mStartValue, pt.mEndValue,
|
|
0.5, dummyValue);
|
|
|
|
PRUint32 currentIndex = nsTArray<ElementPropertyTransition>::NoIndex;
|
|
if (aElementTransitions) {
|
|
nsTArray<ElementPropertyTransition> &pts =
|
|
aElementTransitions->mPropertyTransitions;
|
|
for (PRUint32 i = 0, i_end = pts.Length(); i < i_end; ++i) {
|
|
if (pts[i].mProperty == aProperty) {
|
|
currentIndex = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
nsPresContext *presContext = aNewStyleContext->PresContext();
|
|
|
|
if (!shouldAnimate) {
|
|
if (currentIndex != nsTArray<ElementPropertyTransition>::NoIndex) {
|
|
// We're in the middle of a transition, but just got a
|
|
// non-transition style change changing to exactly the
|
|
// current in-progress value. (This is quite easy to cause
|
|
// using 'transition-delay'.)
|
|
nsTArray<ElementPropertyTransition> &pts =
|
|
aElementTransitions->mPropertyTransitions;
|
|
pts.RemoveElementAt(currentIndex);
|
|
if (pts.IsEmpty()) {
|
|
aElementTransitions->Destroy();
|
|
// |aElementTransitions| is now a dangling pointer!
|
|
aElementTransitions = nsnull;
|
|
}
|
|
// WalkTransitionRule already called RestyleForAnimation.
|
|
}
|
|
return;
|
|
}
|
|
|
|
TimeStamp mostRecentRefresh =
|
|
presContext->RefreshDriver()->MostRecentRefresh();
|
|
|
|
const nsTimingFunction &tf = aTransition.GetTimingFunction();
|
|
float delay = aTransition.GetDelay();
|
|
float duration = aTransition.GetDuration();
|
|
if (duration < 0.0) {
|
|
// The spec says a negative duration is treated as zero.
|
|
duration = 0.0;
|
|
}
|
|
pt.mStartForReversingTest = pt.mStartValue;
|
|
pt.mReversePortion = 1.0;
|
|
|
|
// We need to check two things if we have a currently running
|
|
// transition for this property.
|
|
if (currentIndex != nsTArray<ElementPropertyTransition>::NoIndex) {
|
|
const ElementPropertyTransition &oldPT =
|
|
aElementTransitions->mPropertyTransitions[currentIndex];
|
|
|
|
if (oldPT.mEndValue == pt.mEndValue) {
|
|
// If we got a style change that changed the value to the endpoint
|
|
// of the currently running transition, we don't want to interrupt
|
|
// its timing function.
|
|
// WalkTransitionRule already called RestyleForAnimation.
|
|
return;
|
|
}
|
|
|
|
// If the new transition reverses the old one, we'll need to handle
|
|
// the timing differently.
|
|
if (!oldPT.IsRemovedSentinel() &&
|
|
oldPT.mStartForReversingTest == pt.mEndValue) {
|
|
// Compute the appropriate negative transition-delay such that right
|
|
// now we'd end up at the current position.
|
|
double valuePortion =
|
|
oldPT.ValuePortionFor(mostRecentRefresh) * oldPT.mReversePortion +
|
|
(1.0 - oldPT.mReversePortion);
|
|
// A timing function with negative y1 (or y2!) might make
|
|
// valuePortion negative. In this case, we still want to apply our
|
|
// reversing logic based on relative distances, not make duration
|
|
// negative.
|
|
if (valuePortion < 0.0)
|
|
valuePortion = -valuePortion;
|
|
// A timing function with y2 (or y1!) greater than one might
|
|
// advance past its terminal value. It's probably a good idea to
|
|
// clamp valuePortion to be at most one to preserve the invariant
|
|
// that a transition will complete within at most its specified
|
|
// time.
|
|
if (valuePortion > 1.0)
|
|
valuePortion = 1.0;
|
|
|
|
// Negative delays are essentially part of the transition
|
|
// function, so reduce them along with the duration, but don't
|
|
// reduce positive delays.
|
|
if (delay < 0.0f)
|
|
delay *= valuePortion;
|
|
duration *= valuePortion;
|
|
|
|
pt.mStartForReversingTest = oldPT.mEndValue;
|
|
pt.mReversePortion = valuePortion;
|
|
}
|
|
}
|
|
|
|
pt.mProperty = aProperty;
|
|
pt.mStartTime = mostRecentRefresh + TimeDuration::FromMilliseconds(delay);
|
|
pt.mDuration = TimeDuration::FromMilliseconds(duration);
|
|
pt.mTimingFunction.Init(tf.mX1, tf.mY1, tf.mX2, tf.mY2);
|
|
|
|
if (!aElementTransitions) {
|
|
aElementTransitions =
|
|
GetElementTransitions(aElement, aNewStyleContext->GetPseudoType(),
|
|
PR_TRUE);
|
|
if (!aElementTransitions) {
|
|
NS_WARNING("allocating ElementTransitions failed");
|
|
return;
|
|
}
|
|
}
|
|
|
|
nsTArray<ElementPropertyTransition> &pts =
|
|
aElementTransitions->mPropertyTransitions;
|
|
#ifdef DEBUG
|
|
for (PRUint32 i = 0, i_end = pts.Length(); i < i_end; ++i) {
|
|
NS_ABORT_IF_FALSE(i == currentIndex ||
|
|
pts[i].mProperty != aProperty,
|
|
"duplicate transitions for property");
|
|
}
|
|
#endif
|
|
if (currentIndex != nsTArray<ElementPropertyTransition>::NoIndex) {
|
|
pts[currentIndex] = pt;
|
|
} else {
|
|
if (!pts.AppendElement(pt)) {
|
|
NS_WARNING("out of memory");
|
|
return;
|
|
}
|
|
}
|
|
|
|
nsRestyleHint hint =
|
|
aNewStyleContext->GetPseudoType() ==
|
|
nsCSSPseudoElements::ePseudo_NotPseudoElement ?
|
|
eRestyle_Self : eRestyle_Subtree;
|
|
presContext->PresShell()->RestyleForAnimation(aElement, hint);
|
|
|
|
*aStartedAny = PR_TRUE;
|
|
aWhichStarted->AddProperty(aProperty);
|
|
}
|
|
|
|
ElementTransitions*
|
|
nsTransitionManager::GetElementTransitions(dom::Element *aElement,
|
|
nsCSSPseudoElements::Type aPseudoType,
|
|
PRBool aCreateIfNeeded)
|
|
{
|
|
if (!aCreateIfNeeded && PR_CLIST_IS_EMPTY(&mElementTransitions)) {
|
|
// Early return for the most common case.
|
|
return nsnull;
|
|
}
|
|
|
|
nsIAtom *propName;
|
|
if (aPseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement) {
|
|
propName = nsGkAtoms::transitionsProperty;
|
|
} else if (aPseudoType == nsCSSPseudoElements::ePseudo_before) {
|
|
propName = nsGkAtoms::transitionsOfBeforeProperty;
|
|
} else if (aPseudoType == nsCSSPseudoElements::ePseudo_after) {
|
|
propName = nsGkAtoms::transitionsOfAfterProperty;
|
|
} else {
|
|
NS_ASSERTION(!aCreateIfNeeded,
|
|
"should never try to create transitions for pseudo "
|
|
"other than :before or :after");
|
|
return nsnull;
|
|
}
|
|
ElementTransitions *et = static_cast<ElementTransitions*>(
|
|
aElement->GetProperty(propName));
|
|
if (!et && aCreateIfNeeded) {
|
|
// FIXME: Consider arena-allocating?
|
|
et = new ElementTransitions(aElement, propName, this);
|
|
if (!et) {
|
|
NS_WARNING("out of memory");
|
|
return nsnull;
|
|
}
|
|
nsresult rv = aElement->SetProperty(propName, et,
|
|
ElementTransitionsPropertyDtor, nsnull);
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING("SetProperty failed");
|
|
delete et;
|
|
return nsnull;
|
|
}
|
|
|
|
AddElementTransitions(et);
|
|
}
|
|
|
|
return et;
|
|
}
|
|
|
|
void
|
|
nsTransitionManager::AddElementTransitions(ElementTransitions* aElementTransitions)
|
|
{
|
|
if (PR_CLIST_IS_EMPTY(&mElementTransitions)) {
|
|
// We need to observe the refresh driver.
|
|
nsRefreshDriver *rd = mPresContext->RefreshDriver();
|
|
rd->AddRefreshObserver(this, Flush_Style);
|
|
}
|
|
|
|
PR_INSERT_BEFORE(aElementTransitions, &mElementTransitions);
|
|
}
|
|
|
|
/*
|
|
* nsISupports implementation
|
|
*/
|
|
|
|
NS_IMPL_ISUPPORTS1(nsTransitionManager, nsIStyleRuleProcessor)
|
|
|
|
/*
|
|
* nsIStyleRuleProcessor implementation
|
|
*/
|
|
|
|
void
|
|
nsTransitionManager::WalkTransitionRule(RuleProcessorData* aData,
|
|
nsCSSPseudoElements::Type aPseudoType)
|
|
{
|
|
ElementTransitions *et =
|
|
GetElementTransitions(aData->mElement, aPseudoType, PR_FALSE);
|
|
if (!et) {
|
|
return;
|
|
}
|
|
|
|
if (aData->mPresContext->IsProcessingRestyles() &&
|
|
!aData->mPresContext->IsProcessingAnimationStyleChange()) {
|
|
// If we're processing a normal style change rather than one from
|
|
// animation, don't add the transition rule. This allows us to
|
|
// compute the new style value rather than having the transition
|
|
// override it, so that we can start transitioning differently.
|
|
|
|
// We need to immediately restyle with animation
|
|
// after doing this.
|
|
if (et) {
|
|
nsRestyleHint hint =
|
|
aPseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement ?
|
|
eRestyle_Self : eRestyle_Subtree;
|
|
mPresContext->PresShell()->RestyleForAnimation(aData->mElement, hint);
|
|
}
|
|
return;
|
|
}
|
|
|
|
et->EnsureStyleRuleFor(
|
|
aData->mPresContext->RefreshDriver()->MostRecentRefresh());
|
|
|
|
aData->mRuleWalker->Forward(et->mStyleRule);
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsTransitionManager::RulesMatching(ElementRuleProcessorData* aData)
|
|
{
|
|
NS_ABORT_IF_FALSE(aData->mPresContext == mPresContext,
|
|
"pres context mismatch");
|
|
WalkTransitionRule(aData,
|
|
nsCSSPseudoElements::ePseudo_NotPseudoElement);
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsTransitionManager::RulesMatching(PseudoElementRuleProcessorData* aData)
|
|
{
|
|
NS_ABORT_IF_FALSE(aData->mPresContext == mPresContext,
|
|
"pres context mismatch");
|
|
|
|
// Note: If we're the only thing keeping a pseudo-element frame alive
|
|
// (per ProbePseudoStyleContext), we still want to keep it alive, so
|
|
// this is ok.
|
|
WalkTransitionRule(aData, aData->mPseudoType);
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsTransitionManager::RulesMatching(AnonBoxRuleProcessorData* aData)
|
|
{
|
|
}
|
|
|
|
#ifdef MOZ_XUL
|
|
/* virtual */ void
|
|
nsTransitionManager::RulesMatching(XULTreeRuleProcessorData* aData)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
nsRestyleHint
|
|
nsTransitionManager::HasStateDependentStyle(StateRuleProcessorData* aData)
|
|
{
|
|
return nsRestyleHint(0);
|
|
}
|
|
|
|
PRBool
|
|
nsTransitionManager::HasDocumentStateDependentStyle(StateRuleProcessorData* aData)
|
|
{
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsRestyleHint
|
|
nsTransitionManager::HasAttributeDependentStyle(AttributeRuleProcessorData* aData)
|
|
{
|
|
return nsRestyleHint(0);
|
|
}
|
|
|
|
/* virtual */ PRBool
|
|
nsTransitionManager::MediumFeaturesChanged(nsPresContext* aPresContext)
|
|
{
|
|
return PR_FALSE;
|
|
}
|
|
|
|
struct TransitionEventInfo {
|
|
nsCOMPtr<nsIContent> mElement;
|
|
nsTransitionEvent mEvent;
|
|
|
|
TransitionEventInfo(nsIContent *aElement, nsCSSProperty aProperty,
|
|
TimeDuration aDuration)
|
|
: mElement(aElement),
|
|
mEvent(PR_TRUE, NS_TRANSITION_END,
|
|
NS_ConvertUTF8toUTF16(nsCSSProps::GetStringValue(aProperty)),
|
|
aDuration.ToSeconds())
|
|
{
|
|
}
|
|
|
|
// nsTransitionEvent doesn't support copy-construction, so we need
|
|
// to ourselves in order to work with nsTArray
|
|
TransitionEventInfo(const TransitionEventInfo &aOther)
|
|
: mElement(aOther.mElement),
|
|
mEvent(PR_TRUE, NS_TRANSITION_END,
|
|
aOther.mEvent.propertyName, aOther.mEvent.elapsedTime)
|
|
{
|
|
}
|
|
};
|
|
|
|
/* virtual */ void
|
|
nsTransitionManager::WillRefresh(mozilla::TimeStamp aTime)
|
|
{
|
|
NS_ABORT_IF_FALSE(mPresContext,
|
|
"refresh driver should not notify additional observers "
|
|
"after pres context has been destroyed");
|
|
if (!mPresContext->GetPresShell()) {
|
|
// Someone might be keeping mPresContext alive past the point
|
|
// where it has been torn down; don't bother doing anything in
|
|
// this case. But do get rid of all our transitions so we stop
|
|
// triggering refreshes.
|
|
RemoveAllTransitions();
|
|
return;
|
|
}
|
|
|
|
nsTArray<TransitionEventInfo> events;
|
|
|
|
// Trim transitions that have completed, and post restyle events for
|
|
// frames that are still transitioning.
|
|
{
|
|
PRCList *next = PR_LIST_HEAD(&mElementTransitions);
|
|
while (next != &mElementTransitions) {
|
|
ElementTransitions *et = static_cast<ElementTransitions*>(next);
|
|
next = PR_NEXT_LINK(next);
|
|
|
|
NS_ABORT_IF_FALSE(et->mElement->GetCurrentDoc() ==
|
|
mPresContext->Document(),
|
|
"nsGenericElement::UnbindFromTree should have "
|
|
"destroyed the element transitions object");
|
|
|
|
PRUint32 i = et->mPropertyTransitions.Length();
|
|
NS_ABORT_IF_FALSE(i != 0, "empty transitions list?");
|
|
do {
|
|
--i;
|
|
ElementPropertyTransition &pt = et->mPropertyTransitions[i];
|
|
if (pt.IsRemovedSentinel()) {
|
|
// Actually remove transitions one cycle after their
|
|
// completion. See comment below.
|
|
et->mPropertyTransitions.RemoveElementAt(i);
|
|
} else if (pt.mStartTime + pt.mDuration <= aTime) {
|
|
// This transition has completed.
|
|
|
|
// Fire transitionend events only for transitions on elements
|
|
// and not those on pseudo-elements, since we can't target an
|
|
// event at pseudo-elements.
|
|
if (et->mElementProperty == nsGkAtoms::transitionsProperty) {
|
|
nsCSSProperty prop = pt.mProperty;
|
|
if (nsCSSProps::PropHasFlags(prop, CSS_PROPERTY_REPORT_OTHER_NAME))
|
|
{
|
|
prop = nsCSSProps::OtherNameFor(prop);
|
|
}
|
|
events.AppendElement(
|
|
TransitionEventInfo(et->mElement, prop, pt.mDuration));
|
|
}
|
|
|
|
// Leave this transition in the list for one more refresh
|
|
// cycle, since we haven't yet processed its style change, and
|
|
// if we also have (already, or will have from processing
|
|
// transitionend events or other refresh driver notifications)
|
|
// a non-animation style change that would affect it, we need
|
|
// to know not to start a new transition for the transition
|
|
// from the almost-completed value to the final value.
|
|
pt.SetRemovedSentinel();
|
|
}
|
|
} while (i != 0);
|
|
|
|
// We need to restyle even if the transition rule no longer
|
|
// applies (in which case we just made it not apply).
|
|
NS_ASSERTION(et->mElementProperty == nsGkAtoms::transitionsProperty ||
|
|
et->mElementProperty == nsGkAtoms::transitionsOfBeforeProperty ||
|
|
et->mElementProperty == nsGkAtoms::transitionsOfAfterProperty,
|
|
"Unexpected element property; might restyle too much");
|
|
nsRestyleHint hint = et->mElementProperty == nsGkAtoms::transitionsProperty ?
|
|
eRestyle_Self : eRestyle_Subtree;
|
|
mPresContext->PresShell()->RestyleForAnimation(et->mElement, hint);
|
|
|
|
if (et->mPropertyTransitions.IsEmpty()) {
|
|
et->Destroy();
|
|
// |et| is now a dangling pointer!
|
|
et = nsnull;
|
|
}
|
|
}
|
|
}
|
|
|
|
// We might have removed transitions above.
|
|
TransitionsRemoved();
|
|
|
|
for (PRUint32 i = 0, i_end = events.Length(); i < i_end; ++i) {
|
|
TransitionEventInfo &info = events[i];
|
|
nsEventDispatcher::Dispatch(info.mElement, mPresContext, &info.mEvent);
|
|
|
|
if (!mPresContext) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsTransitionManager::TransitionsRemoved()
|
|
{
|
|
// If we have no transitions left, remove ourselves from the refresh
|
|
// driver.
|
|
if (PR_CLIST_IS_EMPTY(&mElementTransitions)) {
|
|
mPresContext->RefreshDriver()->RemoveRefreshObserver(this, Flush_Style);
|
|
}
|
|
}
|