mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
313 lines
13 KiB
Java
313 lines
13 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
|
|
* 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/. */
|
|
|
|
package org.mozilla.gecko.gfx;
|
|
|
|
import org.mozilla.gecko.GeckoAppShell;
|
|
import org.mozilla.gecko.GeckoEvent;
|
|
import org.mozilla.gecko.PrefsHelper;
|
|
import org.mozilla.gecko.util.FloatUtils;
|
|
import org.mozilla.gecko.util.ThreadUtils;
|
|
|
|
import android.graphics.PointF;
|
|
import android.graphics.RectF;
|
|
import android.os.SystemClock;
|
|
import android.util.Log;
|
|
import android.view.animation.DecelerateInterpolator;
|
|
import android.view.MotionEvent;
|
|
import android.view.View;
|
|
|
|
public class LayerMarginsAnimator {
|
|
private static final String LOGTAG = "GeckoLayerMarginsAnimator";
|
|
// The duration of the animation in ns
|
|
private static final long MARGIN_ANIMATION_DURATION = 250000000;
|
|
private static final String PREF_SHOW_MARGINS_THRESHOLD = "browser.ui.show-margins-threshold";
|
|
|
|
/* This is the proportion of the viewport rect, minus maximum margins,
|
|
* that needs to be travelled before margins will be exposed.
|
|
*/
|
|
private float SHOW_MARGINS_THRESHOLD = 0.20f;
|
|
|
|
/* This rect stores the maximum value margins can grow to when scrolling. When writing
|
|
* to this member variable, or when reading from this member variable on a non-UI thread,
|
|
* you must synchronize on the LayerMarginsAnimator instance. */
|
|
private final RectF mMaxMargins;
|
|
/* If this boolean is true, scroll changes will not affect margins */
|
|
private boolean mMarginsPinned;
|
|
/* The task that handles showing/hiding margins */
|
|
private LayerMarginsAnimationTask mAnimationTask;
|
|
/* This interpolator is used for the above mentioned animation */
|
|
private final DecelerateInterpolator mInterpolator;
|
|
/* The GeckoLayerClient whose margins will be animated */
|
|
private final GeckoLayerClient mTarget;
|
|
/* The distance that has been scrolled since either the first touch event,
|
|
* or since the margins were last fully hidden */
|
|
private final PointF mTouchTravelDistance;
|
|
/* The ID of the prefs listener for the show-margins threshold */
|
|
private Integer mPrefObserverId;
|
|
|
|
public LayerMarginsAnimator(GeckoLayerClient aTarget, LayerView aView) {
|
|
// Assign member variables from parameters
|
|
mTarget = aTarget;
|
|
|
|
// Create other member variables
|
|
mMaxMargins = new RectF();
|
|
mInterpolator = new DecelerateInterpolator();
|
|
mTouchTravelDistance = new PointF();
|
|
|
|
// Listen to the dynamic toolbar pref
|
|
mPrefObserverId = PrefsHelper.getPref(PREF_SHOW_MARGINS_THRESHOLD, new PrefsHelper.PrefHandlerBase() {
|
|
@Override
|
|
public void prefValue(String pref, int value) {
|
|
SHOW_MARGINS_THRESHOLD = value / 100.0f;
|
|
}
|
|
|
|
@Override
|
|
public boolean isObserver() {
|
|
return true;
|
|
}
|
|
});
|
|
}
|
|
|
|
public void destroy() {
|
|
if (mPrefObserverId != null) {
|
|
PrefsHelper.removeObserver(mPrefObserverId);
|
|
mPrefObserverId = null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the maximum values for margins to grow to, in pixels.
|
|
*/
|
|
public synchronized void setMaxMargins(float left, float top, float right, float bottom) {
|
|
ThreadUtils.assertOnUiThread();
|
|
|
|
mMaxMargins.set(left, top, right, bottom);
|
|
|
|
// Update the Gecko-side global for fixed viewport margins.
|
|
GeckoAppShell.sendEventToGecko(
|
|
GeckoEvent.createBroadcastEvent("Viewport:FixedMarginsChanged",
|
|
"{ \"top\" : " + top + ", \"right\" : " + right
|
|
+ ", \"bottom\" : " + bottom + ", \"left\" : " + left + " }"));
|
|
}
|
|
|
|
synchronized RectF getMaxMargins() {
|
|
return mMaxMargins;
|
|
}
|
|
|
|
private void animateMargins(final float left, final float top, final float right, final float bottom, boolean immediately) {
|
|
if (mAnimationTask != null) {
|
|
mTarget.getView().removeRenderTask(mAnimationTask);
|
|
mAnimationTask = null;
|
|
}
|
|
|
|
if (immediately) {
|
|
ImmutableViewportMetrics newMetrics = mTarget.getViewportMetrics().setMargins(left, top, right, bottom);
|
|
mTarget.forceViewportMetrics(newMetrics, true, true);
|
|
return;
|
|
}
|
|
|
|
ImmutableViewportMetrics metrics = mTarget.getViewportMetrics();
|
|
|
|
mAnimationTask = new LayerMarginsAnimationTask(false, metrics, left, top, right, bottom);
|
|
mTarget.getView().postRenderTask(mAnimationTask);
|
|
}
|
|
|
|
/**
|
|
* Exposes the margin area by growing the margin components of the current
|
|
* metrics to the values set in setMaxMargins.
|
|
*/
|
|
public synchronized void showMargins(boolean immediately) {
|
|
animateMargins(mMaxMargins.left, mMaxMargins.top, mMaxMargins.right, mMaxMargins.bottom, immediately);
|
|
}
|
|
|
|
public synchronized void hideMargins(boolean immediately) {
|
|
animateMargins(0, 0, 0, 0, immediately);
|
|
}
|
|
|
|
public void setMarginsPinned(boolean pin) {
|
|
if (pin == mMarginsPinned) {
|
|
return;
|
|
}
|
|
|
|
mMarginsPinned = pin;
|
|
}
|
|
|
|
public boolean areMarginsShown() {
|
|
final ImmutableViewportMetrics metrics = mTarget.getViewportMetrics();
|
|
return metrics.marginLeft != 0 ||
|
|
metrics.marginRight != 0 ||
|
|
metrics.marginTop != 0 ||
|
|
metrics.marginBottom != 0;
|
|
}
|
|
|
|
/**
|
|
* This function will scroll a margin down to zero, or up to the maximum
|
|
* specified margin size and return the left-over delta.
|
|
* aMargins are in/out parameters. In specifies the current margin size,
|
|
* and out specifies the modified margin size. They are specified in the
|
|
* order of start-margin, then end-margin.
|
|
* This function will also take into account how far the touch point has
|
|
* moved and react accordingly. If a touch point hasn't moved beyond a
|
|
* certain threshold, margins can only be hidden and not shown.
|
|
* aNegativeOffset can be used if the remaining delta should be determined
|
|
* by the end-margin instead of the start-margin (for example, in rtl
|
|
* pages).
|
|
*/
|
|
private float scrollMargin(float[] aMargins, float aDelta,
|
|
float aOverscrollStart, float aOverscrollEnd,
|
|
float aTouchTravelDistance,
|
|
float aViewportStart, float aViewportEnd,
|
|
float aPageStart, float aPageEnd,
|
|
float aMaxMarginStart, float aMaxMarginEnd,
|
|
boolean aNegativeOffset) {
|
|
float marginStart = aMargins[0];
|
|
float marginEnd = aMargins[1];
|
|
float viewportSize = aViewportEnd - aViewportStart;
|
|
float exposeThreshold = viewportSize * SHOW_MARGINS_THRESHOLD;
|
|
|
|
if (aDelta >= 0) {
|
|
float marginDelta = Math.max(0, aDelta - aOverscrollStart);
|
|
aMargins[0] = marginStart - Math.min(marginDelta, marginStart);
|
|
if (aTouchTravelDistance < exposeThreshold && marginEnd == 0) {
|
|
// We only want the margin to be newly exposed after the touch
|
|
// has moved a certain distance.
|
|
marginDelta = Math.max(0, marginDelta - (aPageEnd - aViewportEnd));
|
|
}
|
|
aMargins[1] = marginEnd + Math.min(marginDelta, aMaxMarginEnd - marginEnd);
|
|
} else {
|
|
float marginDelta = Math.max(0, -aDelta - aOverscrollEnd);
|
|
aMargins[1] = marginEnd - Math.min(marginDelta, marginEnd);
|
|
if (-aTouchTravelDistance < exposeThreshold && marginStart == 0) {
|
|
marginDelta = Math.max(0, marginDelta - (aViewportStart - aPageStart));
|
|
}
|
|
aMargins[0] = marginStart + Math.min(marginDelta, aMaxMarginStart - marginStart);
|
|
}
|
|
|
|
if (aNegativeOffset) {
|
|
return aDelta - (marginEnd - aMargins[1]);
|
|
}
|
|
return aDelta - (marginStart - aMargins[0]);
|
|
}
|
|
|
|
/*
|
|
* Taking maximum margins into account, offsets the margins and then the
|
|
* viewport origin and returns the modified metrics.
|
|
*/
|
|
ImmutableViewportMetrics scrollBy(ImmutableViewportMetrics aMetrics, float aDx, float aDy) {
|
|
float[] newMarginsX = { aMetrics.marginLeft, aMetrics.marginRight };
|
|
float[] newMarginsY = { aMetrics.marginTop, aMetrics.marginBottom };
|
|
|
|
// Only alter margins if the toolbar isn't pinned
|
|
if (!mMarginsPinned) {
|
|
// Make sure to cancel any margin animations when margin-scrolling begins
|
|
if (mAnimationTask != null) {
|
|
mTarget.getView().removeRenderTask(mAnimationTask);
|
|
mAnimationTask = null;
|
|
}
|
|
|
|
// Reset the touch travel when changing direction
|
|
if ((aDx >= 0) != (mTouchTravelDistance.x >= 0)) {
|
|
mTouchTravelDistance.x = 0;
|
|
}
|
|
if ((aDy >= 0) != (mTouchTravelDistance.y >= 0)) {
|
|
mTouchTravelDistance.y = 0;
|
|
}
|
|
|
|
mTouchTravelDistance.offset(aDx, aDy);
|
|
RectF overscroll = aMetrics.getOverscroll();
|
|
|
|
// Only allow margins to scroll if the page can fill the viewport.
|
|
if (aMetrics.getPageWidth() >= aMetrics.getWidth()) {
|
|
aDx = scrollMargin(newMarginsX, aDx,
|
|
overscroll.left, overscroll.right,
|
|
mTouchTravelDistance.x,
|
|
aMetrics.viewportRectLeft, aMetrics.viewportRectRight,
|
|
aMetrics.pageRectLeft, aMetrics.pageRectRight,
|
|
mMaxMargins.left, mMaxMargins.right,
|
|
aMetrics.isRTL);
|
|
}
|
|
if (aMetrics.getPageHeight() >= aMetrics.getHeight()) {
|
|
aDy = scrollMargin(newMarginsY, aDy,
|
|
overscroll.top, overscroll.bottom,
|
|
mTouchTravelDistance.y,
|
|
aMetrics.viewportRectTop, aMetrics.viewportRectBottom,
|
|
aMetrics.pageRectTop, aMetrics.pageRectBottom,
|
|
mMaxMargins.top, mMaxMargins.bottom,
|
|
false);
|
|
}
|
|
}
|
|
|
|
return aMetrics.setMargins(newMarginsX[0], newMarginsY[0], newMarginsX[1], newMarginsY[1]).offsetViewportBy(aDx, aDy);
|
|
}
|
|
|
|
boolean onInterceptTouchEvent(MotionEvent event) {
|
|
int action = event.getActionMasked();
|
|
if (action == MotionEvent.ACTION_DOWN && event.getPointerCount() == 1) {
|
|
mTouchTravelDistance.set(0.0f, 0.0f);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
class LayerMarginsAnimationTask extends RenderTask {
|
|
private final float mStartLeft, mStartTop, mStartRight, mStartBottom;
|
|
private final float mTop, mBottom, mLeft, mRight;
|
|
private boolean mContinueAnimation;
|
|
|
|
public LayerMarginsAnimationTask(boolean runAfter, ImmutableViewportMetrics metrics,
|
|
float left, float top, float right, float bottom) {
|
|
super(runAfter);
|
|
mContinueAnimation = true;
|
|
this.mStartLeft = metrics.marginLeft;
|
|
this.mStartTop = metrics.marginTop;
|
|
this.mStartRight = metrics.marginRight;
|
|
this.mStartBottom = metrics.marginBottom;
|
|
this.mLeft = left;
|
|
this.mRight = right;
|
|
this.mTop = top;
|
|
this.mBottom = bottom;
|
|
}
|
|
|
|
@Override
|
|
public boolean internalRun(long timeDelta, long currentFrameStartTime) {
|
|
if (!mContinueAnimation) {
|
|
return false;
|
|
}
|
|
|
|
// Calculate the progress (between 0 and 1)
|
|
float progress = mInterpolator.getInterpolation(
|
|
Math.min(1.0f, (System.nanoTime() - getStartTime())
|
|
/ (float)MARGIN_ANIMATION_DURATION));
|
|
|
|
// Calculate the new metrics accordingly
|
|
synchronized (mTarget.getLock()) {
|
|
ImmutableViewportMetrics oldMetrics = mTarget.getViewportMetrics();
|
|
ImmutableViewportMetrics newMetrics = oldMetrics.setMargins(
|
|
FloatUtils.interpolate(mStartLeft, mLeft, progress),
|
|
FloatUtils.interpolate(mStartTop, mTop, progress),
|
|
FloatUtils.interpolate(mStartRight, mRight, progress),
|
|
FloatUtils.interpolate(mStartBottom, mBottom, progress));
|
|
PointF oldOffset = oldMetrics.getMarginOffset();
|
|
PointF newOffset = newMetrics.getMarginOffset();
|
|
newMetrics =
|
|
newMetrics.offsetViewportByAndClamp(newOffset.x - oldOffset.x,
|
|
newOffset.y - oldOffset.y);
|
|
|
|
if (progress >= 1.0f) {
|
|
mContinueAnimation = false;
|
|
|
|
// Force a redraw and update Gecko
|
|
mTarget.forceViewportMetrics(newMetrics, true, true);
|
|
} else {
|
|
mTarget.forceViewportMetrics(newMetrics, false, false);
|
|
}
|
|
}
|
|
return mContinueAnimation;
|
|
}
|
|
}
|
|
|
|
}
|