1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/base/DynamicToolbar.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,167 @@
1.4 +package org.mozilla.gecko;
1.5 +
1.6 +import java.util.EnumSet;
1.7 +
1.8 +import org.mozilla.gecko.PrefsHelper.PrefHandlerBase;
1.9 +import org.mozilla.gecko.gfx.LayerView;
1.10 +import org.mozilla.gecko.util.ThreadUtils;
1.11 +
1.12 +import android.os.Bundle;
1.13 +
1.14 +public class DynamicToolbar {
1.15 + private static final String STATE_ENABLED = "dynamic_toolbar";
1.16 + private static final String CHROME_PREF = "browser.chrome.dynamictoolbar";
1.17 +
1.18 + // DynamicToolbar is enabled iff prefEnabled is true *and* accessibilityEnabled is false,
1.19 + // so it is disabled by default on startup. We do not enable it until we explicitly get
1.20 + // the pref from Gecko telling us to turn it on.
1.21 + private volatile boolean prefEnabled;
1.22 + private boolean accessibilityEnabled;
1.23 +
1.24 + private final int prefObserverId;
1.25 + private final EnumSet<PinReason> pinFlags = EnumSet.noneOf(PinReason.class);
1.26 + private LayerView layerView;
1.27 + private OnEnabledChangedListener enabledChangedListener;
1.28 +
1.29 + public enum PinReason {
1.30 + RELAYOUT,
1.31 + ACTION_MODE
1.32 + }
1.33 +
1.34 + public enum VisibilityTransition {
1.35 + IMMEDIATE,
1.36 + ANIMATE
1.37 + }
1.38 +
1.39 + /**
1.40 + * Listener for changes to the dynamic toolbar's enabled state.
1.41 + */
1.42 + public interface OnEnabledChangedListener {
1.43 + /**
1.44 + * This callback is executed on the UI thread.
1.45 + */
1.46 + public void onEnabledChanged(boolean enabled);
1.47 + }
1.48 +
1.49 + public DynamicToolbar() {
1.50 + // Listen to the dynamic toolbar pref
1.51 + prefObserverId = PrefsHelper.getPref(CHROME_PREF, new PrefHandler());
1.52 + }
1.53 +
1.54 + public void destroy() {
1.55 + PrefsHelper.removeObserver(prefObserverId);
1.56 + }
1.57 +
1.58 + public void setLayerView(LayerView layerView) {
1.59 + ThreadUtils.assertOnUiThread();
1.60 +
1.61 + this.layerView = layerView;
1.62 + }
1.63 +
1.64 + public void setEnabledChangedListener(OnEnabledChangedListener listener) {
1.65 + ThreadUtils.assertOnUiThread();
1.66 +
1.67 + enabledChangedListener = listener;
1.68 + }
1.69 +
1.70 + public void onSaveInstanceState(Bundle outState) {
1.71 + ThreadUtils.assertOnUiThread();
1.72 +
1.73 + outState.putBoolean(STATE_ENABLED, prefEnabled);
1.74 + }
1.75 +
1.76 + public void onRestoreInstanceState(Bundle savedInstanceState) {
1.77 + ThreadUtils.assertOnUiThread();
1.78 +
1.79 + if (savedInstanceState != null) {
1.80 + prefEnabled = savedInstanceState.getBoolean(STATE_ENABLED);
1.81 + }
1.82 + }
1.83 +
1.84 + public boolean isEnabled() {
1.85 + ThreadUtils.assertOnUiThread();
1.86 +
1.87 + return prefEnabled && !accessibilityEnabled;
1.88 + }
1.89 +
1.90 + public void setAccessibilityEnabled(boolean enabled) {
1.91 + ThreadUtils.assertOnUiThread();
1.92 +
1.93 + if (accessibilityEnabled == enabled) {
1.94 + return;
1.95 + }
1.96 +
1.97 + // Disable the dynamic toolbar when accessibility features are enabled,
1.98 + // and re-read the preference when they're disabled.
1.99 + accessibilityEnabled = enabled;
1.100 + if (prefEnabled) {
1.101 + triggerEnabledListener();
1.102 + }
1.103 + }
1.104 +
1.105 + public void setVisible(boolean visible, VisibilityTransition transition) {
1.106 + ThreadUtils.assertOnUiThread();
1.107 +
1.108 + if (layerView == null) {
1.109 + return;
1.110 + }
1.111 +
1.112 + final boolean immediate = transition.equals(VisibilityTransition.IMMEDIATE);
1.113 + if (visible) {
1.114 + layerView.getLayerMarginsAnimator().showMargins(immediate);
1.115 + } else {
1.116 + layerView.getLayerMarginsAnimator().hideMargins(immediate);
1.117 + }
1.118 + }
1.119 +
1.120 + public void setPinned(boolean pinned, PinReason reason) {
1.121 + ThreadUtils.assertOnUiThread();
1.122 +
1.123 + if (layerView == null) {
1.124 + return;
1.125 + }
1.126 +
1.127 + if (pinned) {
1.128 + pinFlags.add(reason);
1.129 + } else {
1.130 + pinFlags.remove(reason);
1.131 + }
1.132 +
1.133 + layerView.getLayerMarginsAnimator().setMarginsPinned(!pinFlags.isEmpty());
1.134 + }
1.135 +
1.136 + private void triggerEnabledListener() {
1.137 + if (enabledChangedListener != null) {
1.138 + enabledChangedListener.onEnabledChanged(isEnabled());
1.139 + }
1.140 + }
1.141 +
1.142 + private class PrefHandler extends PrefHandlerBase {
1.143 + @Override
1.144 + public void prefValue(String pref, boolean value) {
1.145 + if (value == prefEnabled) {
1.146 + return;
1.147 + }
1.148 +
1.149 + prefEnabled = value;
1.150 +
1.151 + ThreadUtils.postToUiThread(new Runnable() {
1.152 + @Override
1.153 + public void run() {
1.154 + // If accessibility is enabled, the dynamic toolbar is
1.155 + // forced to be off.
1.156 + if (!accessibilityEnabled) {
1.157 + triggerEnabledListener();
1.158 + }
1.159 + }
1.160 + });
1.161 + }
1.162 +
1.163 + @Override
1.164 + public boolean isObserver() {
1.165 + // We want to be notified of changes to be able to switch mode
1.166 + // without restarting.
1.167 + return true;
1.168 + }
1.169 + }
1.170 +}
1.171 \ No newline at end of file
