From 9d2718e7a2d58ce87a18ca4987553fd996180f3c Mon Sep 17 00:00:00 2001
From: John Reck <jreck@google.com>
Date: Wed, 5 Oct 2011 17:10:17 -0700
Subject: Fail fast if we won't be able to load

 Bug: 5416822

Change-Id: I105b514a84f2be15b460a4c85933d4eb1e897547
---
 .../browser/SnapshotByteArrayOutputStream.java     | 58 ++++++++++++++++++++++
 src/com/android/browser/Tab.java                   |  2 +-
 2 files changed, 59 insertions(+), 1 deletion(-)
 create mode 100644 src/com/android/browser/SnapshotByteArrayOutputStream.java

(limited to 'src/com/android/browser')

diff --git a/src/com/android/browser/SnapshotByteArrayOutputStream.java b/src/com/android/browser/SnapshotByteArrayOutputStream.java
new file mode 100644
index 000000000..bfd1a76a9
--- /dev/null
+++ b/src/com/android/browser/SnapshotByteArrayOutputStream.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2011 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.browser;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+public class SnapshotByteArrayOutputStream extends OutputStream {
+
+    // Maximum size, just below CursorWindow's 2mb row limit
+    private static final int MAX_SIZE = 2000000;
+    private ByteArrayOutputStream mStream;
+
+    public SnapshotByteArrayOutputStream() {
+        mStream = new ByteArrayOutputStream(MAX_SIZE);
+    }
+
+    @Override
+    public synchronized void write(int oneByte) throws IOException {
+        checkError(1);
+        mStream.write(oneByte);
+    }
+
+    @Override
+    public void write(byte[] buffer, int offset, int count) throws IOException {
+        checkError(count);
+        mStream.write(buffer, offset, count);
+    }
+
+    private void checkError(int expandBy) throws IOException {
+        if ((size() + expandBy) > MAX_SIZE) {
+            throw new IOException("Exceeded max size!");
+        }
+    }
+
+    public int size() {
+        return mStream.size();
+    }
+
+    public byte[] toByteArray() {
+        return mStream.toByteArray();
+    }
+
+}
diff --git a/src/com/android/browser/Tab.java b/src/com/android/browser/Tab.java
index ae52943a5..8023375fc 100644
--- a/src/com/android/browser/Tab.java
+++ b/src/com/android/browser/Tab.java
@@ -2016,7 +2016,7 @@ class Tab implements PictureListener {
 
     public ContentValues createSnapshotValues() {
         if (mMainView == null) return null;
-        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        SnapshotByteArrayOutputStream bos = new SnapshotByteArrayOutputStream();
         try {
             GZIPOutputStream stream = new GZIPOutputStream(bos);
             if (!mMainView.saveViewState(stream)) {
-- 
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