Persistent frozen tabs

 On Tablet WebViews for frozen tabs are created on demand
 On Phone WebViews for frozen tabs are tied to the lifecycle
 of the SnapshotTab for nav screen reasons (for now)

Change-Id: I80cb48e748c4dd4b8564426d5e05b92f3eea7a36

1 files changed, 19 insertions, 98 deletions

diff --git a/src/com/android/browser/Tab.java b/src/com/android/browser/Tab.java
index 89f567b8a..bb200d814 100644
--- a/src/com/android/browser/Tab.java
+++ b/src/com/android/browser/Tab.java
@@ -20,6 +20,8 @@ import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.SearchManager;
 import android.content.ContentResolver;
+import android.content.ContentUris;
+import android.content.ContentValues;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnCancelListener;
@@ -62,6 +64,7 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import com.android.browser.homepages.HomeProvider;
+import com.android.browser.provider.BrowserProvider2.Snapshots;
 import com.android.common.speech.LoggingEvents;
 
 import java.io.ByteArrayOutputStream;
@@ -96,10 +99,10 @@ class Tab {
     }
 
     Activity mActivity;
-    private WebViewController mWebViewController;
+    protected WebViewController mWebViewController;
 
     // The tab ID
-    private long mId;
+    private long mId = -1;
 
     // The Geolocation permissions prompt
     private GeolocationPermissionsPrompt mGeolocationPermissionsPrompt;
@@ -145,7 +148,6 @@ class Tab {
     private DataController mDataController;
     // State of the auto-login request.
     private DeviceAccountLogin mDeviceAccountLogin;
-    private boolean mIsSnapshot = false;
 
     // AsyncTask for downloading touch icons
     DownloadTouchIcon mTouchIconLoader;
@@ -154,7 +156,7 @@ class Tab {
     private BrowserSettings mSettings;
 
     // All the state needed for a page
-    private static class PageState {
+    protected static class PageState {
         String mUrl;
         String mTitle;
         LockIcon mLockIcon;
@@ -192,7 +194,7 @@ class Tab {
     }
 
     // The current/loading page's state
-    private PageState mCurrentState;
+    protected PageState mCurrentState;
 
     // Used for saving and restoring each Tab
     static final String ID = "ID";
@@ -1512,10 +1514,6 @@ class Tab {
      * @param child the Tab that was created from this Tab
      */
     void addChildTab(Tab child) {
-        if (mIsSnapshot) {
-            throw new IllegalStateException(
-                    "Snapshot tabs cannot have child tabs!");
-        }
         if (mChildren == null) {
             mChildren = new Vector<Tab>();
         }
@@ -1846,100 +1844,23 @@ class Tab {
     }
 
     public boolean isSnapshot() {
-        return mIsSnapshot;
-    }
-
-    public boolean loadSnapshot(InputStream rstream) {
-        if (rstream == null) {
-            mIsSnapshot = false;
-            if (mMainView != null) {
-                mMainView.clearViewState();
-            }
-            return true;
-        }
-        DataInputStream stream = new DataInputStream(rstream);
-        if (!readTabInfo(stream)) {
-            return false;
-        }
-        if (!mMainView.loadViewState(stream)) {
-            return false;
-        }
-        mIsSnapshot = true;
-        return true;
-    }
-
-    public boolean saveSnapshot(OutputStream rstream) {
-        if (rstream == null) return false;
-        if (mMainView == null) return false;
-        DataOutputStream stream = new DataOutputStream(rstream);
-        if (saveTabInfo(stream)) {
-            return mMainView.saveViewState(stream);
-        }
         return false;
     }
 
-    private boolean readTabInfo(DataInputStream stream) {
-        try {
-            PageState state = new PageState(mActivity, false);
-            state.mTitle = stream.readUTF();
-            if (state.mTitle.length() == 0) {
-                state.mTitle = null;
-            }
-            state.mUrl = stream.readUTF();
-            int faviconLen = stream.readInt();
-            if (faviconLen > 0) {
-                byte[] data = new byte[faviconLen];
-                int read = stream.read(data);
-                if (read != faviconLen) {
-                    throw new IOException("Read didn't match expected len!"
-                            + " Expected: " + faviconLen
-                            + " Got: " + read);
-                }
-                state.mFavicon = BitmapFactory.decodeByteArray(data, 0, data.length);
-            }
-            mCurrentState = state;
-            return true;
-        } catch (IOException e) {
-            return false;
-        }
-    }
-
-    private boolean saveTabInfo(DataOutputStream stream) {
-        try {
-            // mTitle might be null, but writeUTF doesn't handle that
-            String title = mCurrentState.mTitle;
-            stream.writeUTF(title != null ? title : "");
-            // mUrl is never null
-            stream.writeUTF(mCurrentState.mUrl);
-            byte[] compressedPixels = compressFavicon();
-            if (compressedPixels == null) {
-                stream.writeInt(-1);
-            } else {
-                stream.writeInt(compressedPixels.length);
-                stream.write(compressedPixels);
-            }
-            return true;
-        } catch (Exception e) {
-            Log.w(LOGTAG, "Failed to saveTabInfo", e);
-            return false;
-        }
-    }
-
-    private byte[] compressFavicon() {
-        Bitmap favicon = mCurrentState.mFavicon;
-        if (favicon == null) {
+    public ContentValues createSnapshotValues() {
+        if (mMainView == null) return null;
+        ByteArrayOutputStream stream = new ByteArrayOutputStream();
+        if (!mMainView.saveViewState(stream)) {
             return null;
         }
-        ByteArrayOutputStream stream = new ByteArrayOutputStream();
-        byte[] data = null;
-        try {
-            favicon.compress(CompressFormat.PNG, 100, stream);
-            data = stream.toByteArray();
-            stream.close();
-        } catch (IOException e) {
-            // Will return null below then
-        }
-        return data;
+        byte[] data = stream.toByteArray();
+        ContentResolver cr = mActivity.getContentResolver();
+        ContentValues values = new ContentValues();
+        values.put(Snapshots.TITLE, mCurrentState.mTitle);
+        values.put(Snapshots.URL, mCurrentState.mUrl);
+        values.put(Snapshots.VIEWSTATE, data);
+        values.put(Snapshots.BACKGROUND, mMainView.getPageBackgroundColor());
+        return values;
     }
 
 }