1 files changed, 276 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/app/ActivityState.java b/src/com/android/gallery3d/app/ActivityState.java
new file mode 100644
index 000000000..2f1e0c9d9
--- /dev/null
+++ b/src/com/android/gallery3d/app/ActivityState.java
@@ -0,0 +1,276 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.gallery3d.app;
+
+import android.app.ActionBar;
+import android.app.Activity;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.res.Configuration;
+import android.os.BatteryManager;
+import android.os.Bundle;
+import android.view.HapticFeedbackConstants;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.Window;
+import android.view.WindowManager;
+
+import com.android.gallery3d.R;
+import com.android.gallery3d.anim.StateTransitionAnimation;
+import com.android.gallery3d.glrenderer.RawTexture;
+import com.android.gallery3d.ui.GLView;
+import com.android.gallery3d.ui.PreparePageFadeoutTexture;
+import com.android.gallery3d.util.GalleryUtils;
+
+abstract public class ActivityState {
+    protected static final int FLAG_HIDE_ACTION_BAR = 1;
+    protected static final int FLAG_HIDE_STATUS_BAR = 2;
+    protected static final int FLAG_SCREEN_ON_WHEN_PLUGGED = 4;
+    protected static final int FLAG_SCREEN_ON_ALWAYS = 8;
+    protected static final int FLAG_ALLOW_LOCK_WHILE_SCREEN_ON = 16;
+    protected static final int FLAG_SHOW_WHEN_LOCKED = 32;
+
+    protected AbstractGalleryActivity mActivity;
+    protected Bundle mData;
+    protected int mFlags;
+
+    protected ResultEntry mReceivedResults;
+    protected ResultEntry mResult;
+
+    protected static class ResultEntry {
+        public int requestCode;
+        public int resultCode = Activity.RESULT_CANCELED;
+        public Intent resultData;
+    }
+
+    private boolean mDestroyed = false;
+    private boolean mPlugged = false;
+    boolean mIsFinishing = false;
+
+    private static final String KEY_TRANSITION_IN = "transition-in";
+
+    private StateTransitionAnimation.Transition mNextTransition =
+            StateTransitionAnimation.Transition.None;
+    private StateTransitionAnimation mIntroAnimation;
+    private GLView mContentPane;
+
+    protected ActivityState() {
+    }
+
+    protected void setContentPane(GLView content) {
+        mContentPane = content;
+        if (mIntroAnimation != null) {
+            mContentPane.setIntroAnimation(mIntroAnimation);
+            mIntroAnimation = null;
+        }
+        mContentPane.setBackgroundColor(getBackgroundColor());
+        mActivity.getGLRoot().setContentPane(mContentPane);
+    }
+
+    void initialize(AbstractGalleryActivity activity, Bundle data) {
+        mActivity = activity;
+        mData = data;
+    }
+
+    public Bundle getData() {
+        return mData;
+    }
+
+    protected void onBackPressed() {
+        mActivity.getStateManager().finishState(this);
+    }
+
+    protected void setStateResult(int resultCode, Intent data) {
+        if (mResult == null) return;
+        mResult.resultCode = resultCode;
+        mResult.resultData = data;
+    }
+
+    protected void onConfigurationChanged(Configuration config) {
+    }
+
+    protected void onSaveState(Bundle outState) {
+    }
+
+    protected void onStateResult(int requestCode, int resultCode, Intent data) {
+    }
+
+    protected float[] mBackgroundColor;
+
+    protected int getBackgroundColorId() {
+        return R.color.default_background;
+    }
+
+    protected float[] getBackgroundColor() {
+        return mBackgroundColor;
+    }
+
+    protected void onCreate(Bundle data, Bundle storedState) {
+        mBackgroundColor = GalleryUtils.intColorToFloatARGBArray(
+                mActivity.getResources().getColor(getBackgroundColorId()));
+    }
+
+    protected void clearStateResult() {
+    }
+
+    BroadcastReceiver mPowerIntentReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            final String action = intent.getAction();
+            if (Intent.ACTION_BATTERY_CHANGED.equals(action)) {
+                boolean plugged = (0 != intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, 0));
+
+                if (plugged != mPlugged) {
+                    mPlugged = plugged;
+                    setScreenFlags();
+                }
+            }
+        }
+    };
+
+    private void setScreenFlags() {
+        final Window win = mActivity.getWindow();
+        final WindowManager.LayoutParams params = win.getAttributes();
+        if ((0 != (mFlags & FLAG_SCREEN_ON_ALWAYS)) ||
+                (mPlugged && 0 != (mFlags & FLAG_SCREEN_ON_WHEN_PLUGGED))) {
+            params.flags |= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
+        } else {
+            params.flags &= ~WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
+        }
+        if (0 != (mFlags & FLAG_ALLOW_LOCK_WHILE_SCREEN_ON)) {
+            params.flags |= WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON;
+        } else {
+            params.flags &= ~WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON;
+        }
+        if (0 != (mFlags & FLAG_SHOW_WHEN_LOCKED)) {
+            params.flags |= WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
+        } else {
+            params.flags &= ~WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
+        }
+        win.setAttributes(params);
+    }
+
+    protected void transitionOnNextPause(Class<? extends ActivityState> outgoing,
+            Class<? extends ActivityState> incoming, StateTransitionAnimation.Transition hint) {
+        if (outgoing == SinglePhotoPage.class && incoming == AlbumPage.class) {
+            mNextTransition = StateTransitionAnimation.Transition.Outgoing;
+        } else if (outgoing == AlbumPage.class && incoming == SinglePhotoPage.class) {
+            mNextTransition = StateTransitionAnimation.Transition.PhotoIncoming;
+        } else {
+            mNextTransition = hint;
+        }
+    }
+
+    protected void performHapticFeedback(int feedbackConstant) {
+        mActivity.getWindow().getDecorView().performHapticFeedback(feedbackConstant,
+                HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING);
+    }
+
+    protected void onPause() {
+        if (0 != (mFlags & FLAG_SCREEN_ON_WHEN_PLUGGED)) {
+            ((Activity) mActivity).unregisterReceiver(mPowerIntentReceiver);
+        }
+        if (mNextTransition != StateTransitionAnimation.Transition.None) {
+            mActivity.getTransitionStore().put(KEY_TRANSITION_IN, mNextTransition);
+            PreparePageFadeoutTexture.prepareFadeOutTexture(mActivity, mContentPane);
+            mNextTransition = StateTransitionAnimation.Transition.None;
+        }
+    }
+
+    // should only be called by StateManager
+    void resume() {
+        AbstractGalleryActivity activity = mActivity;
+        ActionBar actionBar = activity.getActionBar();
+        if (actionBar != null) {
+            if ((mFlags & FLAG_HIDE_ACTION_BAR) != 0) {
+                actionBar.hide();
+            } else {
+                actionBar.show();
+            }
+            int stateCount = mActivity.getStateManager().getStateCount();
+            mActivity.getGalleryActionBar().setDisplayOptions(stateCount > 1, true);
+            // Default behavior, this can be overridden in ActivityState's onResume.
+            actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
+        }
+
+        activity.invalidateOptionsMenu();
+
+        setScreenFlags();
+
+        boolean lightsOut = ((mFlags & FLAG_HIDE_STATUS_BAR) != 0);
+        mActivity.getGLRoot().setLightsOutMode(lightsOut);
+
+        ResultEntry entry = mReceivedResults;
+        if (entry != null) {
+            mReceivedResults = null;
+            onStateResult(entry.requestCode, entry.resultCode, entry.resultData);
+        }
+
+        if (0 != (mFlags & FLAG_SCREEN_ON_WHEN_PLUGGED)) {
+            // we need to know whether the device is plugged in to do this correctly
+            final IntentFilter filter = new IntentFilter();
+            filter.addAction(Intent.ACTION_BATTERY_CHANGED);
+            activity.registerReceiver(mPowerIntentReceiver, filter);
+        }
+
+        onResume();
+
+        // the transition store should be cleared after resume;
+        mActivity.getTransitionStore().clear();
+    }
+
+    // a subclass of ActivityState should override the method to resume itself
+    protected void onResume() {
+        RawTexture fade = mActivity.getTransitionStore().get(
+                PreparePageFadeoutTexture.KEY_FADE_TEXTURE);
+        mNextTransition = mActivity.getTransitionStore().get(
+                KEY_TRANSITION_IN, StateTransitionAnimation.Transition.None);
+        if (mNextTransition != StateTransitionAnimation.Transition.None) {
+            mIntroAnimation = new StateTransitionAnimation(mNextTransition, fade);
+            mNextTransition = StateTransitionAnimation.Transition.None;
+        }
+    }
+
+    protected boolean onCreateActionBar(Menu menu) {
+        // TODO: we should return false if there is no menu to show
+        //       this is a workaround for a bug in system
+        return true;
+    }
+
+    protected boolean onItemSelected(MenuItem item) {
+        return false;
+    }
+
+    protected void onDestroy() {
+        mDestroyed = true;
+    }
+
+    boolean isDestroyed() {
+        return mDestroyed;
+    }
+
+    public boolean isFinishing() {
+        return mIsFinishing;
+    }
+
+    protected MenuInflater getSupportMenuInflater() {
+        return mActivity.getMenuInflater();
+    }
+}