browser: allow to load browser internal assets

The new webview classes avoid to load urls from local file schemes.
Just replace the load of internal browser assets (most_visited) from
loadUrl to loadData.

Signed-off-by: Jorge Ruesga <jorge@ruesga.com>

Change-Id: Iee633a1a3599a7e752e15452fa04e15baac2e256
Cherry-Picked: http://review.cyanogenmod.org/#/c/62126/3

3 files changed, 59 insertions, 10 deletions

diff --git a/src/com/android/browser/Tab.java b/src/com/android/browser/Tab.java
index 907f7a1f3..ceacd4208 100644
--- a/src/com/android/browser/Tab.java
+++ b/src/com/android/browser/Tab.java
@@ -76,6 +76,7 @@ import com.android.browser.provider.SnapshotProvider.Snapshots;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.OutputStream;
 import java.nio.ByteBuffer;
 import java.security.Principal;
@@ -161,6 +162,8 @@ class Tab implements PictureListener {
     // before onPageFinsihed)
     private boolean mInPageLoad;
     private boolean mDisableOverrideUrlLoading;
+    // If true, the current page is the most visited page
+    private boolean mInMostVisitedPage;
     // The last reported progress of the current page
     private int mPageLoadProgress;
     // The time the load started, used to find load page time
@@ -394,6 +397,16 @@ class Tab implements PictureListener {
             }
             syncCurrentState(view, url);
             mWebViewController.onPageFinished(Tab.this);
+
+            if (view.getUrl().equals(HomeProvider.MOST_VISITED_URL)) {
+                if (!mInMostVisitedPage) {
+                    loadUrl(HomeProvider.MOST_VISITED, null);
+                    mInMostVisitedPage = true;
+                }
+                view.clearHistory();
+            } else {
+                mInMostVisitedPage = false;
+            }
         }
 
         // return true if want to hijack the url to let another app to handle it
@@ -1847,7 +1860,20 @@ class Tab implements PictureListener {
             mInPageLoad = true;
             mCurrentState = new PageState(mContext, false, url, null);
             mWebViewController.onPageStarted(this, mMainView, null);
-            mMainView.loadUrl(url, headers);
+            WebResourceResponse res = HomeProvider.shouldInterceptRequest(mContext, url);
+            if (res != null) {
+                try {
+                    String data = readWebResource(res).toString();
+                    mInMostVisitedPage = true;
+                    mMainView.loadDataWithBaseURL(url, data, res.getMimeType(), res.getEncoding(),
+                            HomeProvider.MOST_VISITED_URL);
+                } catch (IOException io) {
+                    // Fallback to default load handling
+                    mMainView.loadUrl(url, headers);
+                }
+            } else {
+                mMainView.loadUrl(url, headers);
+            }
         }
     }
 
@@ -2002,4 +2028,19 @@ class Tab implements PictureListener {
         if (mSubView != null)
             cookieManager.setAcceptThirdPartyCookies(mSubView, accept);
     }
+
+    private StringBuilder readWebResource(WebResourceResponse response) throws IOException {
+        StringBuilder sb = new StringBuilder();
+        InputStream is = response.getData();
+        try {
+            byte[] data = new byte[512];
+            int read = 0;
+            while ((read = is.read(data, 0, 512)) != -1) {
+                sb.append(new String(data, 0, read));
+            }
+        } finally {
+            is.close();
+        }
+        return sb;
+    }
 }
diff --git a/src/com/android/browser/homepages/HomeProvider.java b/src/com/android/browser/homepages/HomeProvider.java
index dc559441b..a1c1d8593 100644
--- a/src/com/android/browser/homepages/HomeProvider.java
+++ b/src/com/android/browser/homepages/HomeProvider.java
@@ -41,6 +41,7 @@ public class HomeProvider extends ContentProvider {
     private static final String TAG = "HomeProvider";

     public static final String AUTHORITY = "com.android.browser.home";

     public static final String MOST_VISITED = "content://" + AUTHORITY + "/";

+    public static final String MOST_VISITED_URL = "about:most_visited";

 

     @Override

     public int delete(Uri uri, String selection, String[] selectionArgs) {

@@ -88,17 +89,24 @@ public class HomeProvider extends ContentProvider {
         }

     }

 

+    public static boolean isMostVisitedPage(String url) {

+        boolean useMostVisited = BrowserSettings.getInstance().useMostVisitedHomepage();

+        if (useMostVisited && url.startsWith("content://")) {

+            Uri uri = Uri.parse(url);

+            if (AUTHORITY.equals(uri.getAuthority())) {

+                return true;

+            }

+        }

+        return false;

+    }

+

     public static WebResourceResponse shouldInterceptRequest(Context context,

             String url) {

         try {

-            boolean useMostVisited = BrowserSettings.getInstance().useMostVisitedHomepage();

-            if (useMostVisited && url.startsWith("content://")) {

-                Uri uri = Uri.parse(url);

-                if (AUTHORITY.equals(uri.getAuthority())) {

-                    InputStream ins = context.getContentResolver()

-                            .openInputStream(uri);

-                    return new WebResourceResponse("text/html", "utf-8", ins);

-                }

+            if (isMostVisitedPage(url)) {

+                InputStream ins = context.getContentResolver()

+                        .openInputStream(Uri.parse(url + "/home"));

+                return new WebResourceResponse("text/html", "utf-8", ins);

             }

             boolean listFiles = BrowserSettings.getInstance().isDebugEnabled();

             if (listFiles && interceptFile(url)) {

diff --git a/src/com/android/browser/homepages/RequestHandler.java b/src/com/android/browser/homepages/RequestHandler.java
index 823935efa..c73ec9a72 100644
--- a/src/com/android/browser/homepages/RequestHandler.java
+++ b/src/com/android/browser/homepages/RequestHandler.java
@@ -54,7 +54,7 @@ public class RequestHandler extends Thread {
     OutputStream mOutput;

 

     static {

-        sUriMatcher.addURI(HomeProvider.AUTHORITY, "/", INDEX);

+        sUriMatcher.addURI(HomeProvider.AUTHORITY, "home", INDEX);

         sUriMatcher.addURI(HomeProvider.AUTHORITY, "res/*/*", RESOURCE);

     }