Preloading support in browser

	   Apps like the QSB can request the browser to preload a
	   web page.
           - preloaded pages are not added to the browser history
	     if they'r not seen by the user
	   - when a request is received, a new tab is created for the
	     preloaded page, but not added to the tab list
 	   - upon receiving the view intent for the preloaded page
             the tab is added to the tab list, and shown
	   - if several pages are preloaded consecutively in the same tab,
             the back stack is cleared before it is displayed
           - preloaded pages use the main browser cookie jar, so pages that
             have never been viewed by the user can drop cookies

Change-Id: I9ed21f2c9560fda0ed042b460b73bb33988a2e8a

1 files changed, 69 insertions, 0 deletions

diff --git a/src/com/android/browser/BrowserWebViewFactory.java b/src/com/android/browser/BrowserWebViewFactory.java
new file mode 100644
index 00000000..fbd26a94
--- /dev/null
+++ b/src/com/android/browser/BrowserWebViewFactory.java
@@ -0,0 +1,69 @@
+/*
+ * 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 android.content.Context;
+import android.content.pm.PackageManager;
+import android.util.AttributeSet;
+import android.view.View;
+import android.webkit.WebView;
+
+/**
+ * Web view factory class for creating {@link BrowserWebView}'s.
+ */
+public class BrowserWebViewFactory implements WebViewFactory {
+
+    private final Context mContext;
+
+    public BrowserWebViewFactory(Context context) {
+        mContext = context;
+    }
+
+    protected WebView instantiateWebView(AttributeSet attrs, int defStyle,
+            boolean privateBrowsing) {
+        return new BrowserWebView(mContext, attrs, defStyle, privateBrowsing);
+    }
+
+    @Override
+    public WebView createSubWebView(boolean privateBrowsing) {
+        return createWebView(privateBrowsing);
+    }
+
+    @Override
+    public WebView createWebView(boolean privateBrowsing) {
+        WebView w = instantiateWebView(null, android.R.attr.webViewStyle, privateBrowsing);
+        initWebViewSettings(w);
+        return w;
+    }
+
+    protected void initWebViewSettings(WebView w) {
+        w.setScrollbarFadingEnabled(true);
+        w.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
+        w.setMapTrackballToArrowKeys(false); // use trackball directly
+        // Enable the built-in zoom
+        w.getSettings().setBuiltInZoomControls(true);
+        boolean supportsMultiTouch = mContext.getPackageManager()
+                .hasSystemFeature(PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH);
+        w.getSettings().setDisplayZoomControls(!supportsMultiTouch);
+        w.setExpandedTileBounds(true);  // smoother scrolling
+
+        // Add this WebView to the settings observer list and update the
+        // settings
+        final BrowserSettings s = BrowserSettings.getInstance();
+        s.startManagingSettings(w.getSettings());
+    }
+
+}