SDK Updater: Better handling of fetch errors.

The remote page now shows fetch errors in the tree.
Using refresh tries to reload error sources.

tools/sdkmanager/libs/sdklib/src/com/android/sdklib/internal/repository/RepoSource.java

@@ -51,6 +51,7 @@ public class RepoSource implements IDescription {
 
     private Package[] mPackages;
     private String mDescription;
+    private String mFetchError;
 
     /**
      * Constructs a new source for the given repository URL.
@@ -96,6 +97,14 @@ public class RepoSource implements IDescription {
         return mDescription == null ? "" : mDescription;  //$NON-NLS-1$
     }
 
+    /**
+     * Returns the last fetch error description.
+     * If there was no error, returns null.
+     */
+    public String getFetchError() {
+        return mFetchError;
+    }
+
     /**
      * Tries to fetch the repository index for the given URL.
      */
@@ -104,6 +113,8 @@ public class RepoSource implements IDescription {
         monitor.setProgressMax(4);
 
         setDefaultDescription();
+        mFetchError = null;        // reset fetch error
+
 
         String url = mUrl;
         if (forceHttp) {
@@ -117,6 +128,8 @@ public class RepoSource implements IDescription {
 
         if (xml == null) {
             mDescription += String.format("\nFailed to fetch URL %1$s", url);
+            mFetchError = "Failed to fetch URL";
+            monitor.setResult("Failed to fetch URL %1$s", url);
             return;
         }
 
@@ -125,6 +138,8 @@ public class RepoSource implements IDescription {
 
         if (!validateXml(xml, monitor)) {
             mDescription += String.format("\nFailed to validate XML at %1$s", url);
+            mFetchError = "Failed to validate XML";
+            monitor.setResult("\nFailed to validate XML at %1$s", url);
             return;
         }
 

tools/sdkmanager/libs/sdkuilib/src/com/android/sdkuilib/internal/repository/RepoSourcesAdapter.java

@@ -36,10 +36,28 @@ import org.eclipse.swt.graphics.Image;
  *
  * This implementation is UI dependent.
  */
-class RepoSourcesAdapter {
+public class RepoSourcesAdapter {
 
     private final UpdaterData mUpdaterData;
 
+    public static class RepoSourceError implements IDescription {
+
+        private final RepoSource mSource;
+
+        public RepoSourceError(RepoSource source) {
+            mSource = source;
+        }
+
+        public String getLongDescription() {
+            return mSource.getLongDescription();
+        }
+
+        public String getShortDescription() {
+            return mSource.getFetchError();
+        }
+    }
+
+
     public RepoSourcesAdapter(UpdaterData updaterData) {
         mUpdaterData = updaterData;
     }
@@ -55,7 +73,7 @@ class RepoSourcesAdapter {
 
     // ------------
 
-    public class ViewerLabelProvider extends LabelProvider {
+    private class ViewerLabelProvider extends LabelProvider {
 
         /** Returns an image appropriate for this element. */
         @Override
@@ -119,8 +137,7 @@ class RepoSourcesAdapter {
                 final RepoSource source = (RepoSource) parentElement;
                 Package[] packages = source.getPackages();
 
-                if (packages == null) {
+                if (packages == null && source.getFetchError() == null) {
-
                     final boolean forceHttp = mUpdaterData.getSettingsController().getForceHttp();
 
                     mUpdaterData.getTaskFactory().start("Loading Source", new ITask() {
@@ -133,6 +150,9 @@ class RepoSourcesAdapter {
                 }
                 if (packages != null) {
                     return packages;
+                } else if (source.getFetchError() != null) {
+                    // Return a dummy entry to display the fetch error
+                    return new Object[] { new RepoSourceError(source) };
                 }
 
             } else if (parentElement instanceof Package) {

tools/sdkmanager/libs/sdkuilib/src/com/android/sdkuilib/internal/repository/UpdaterData.java

@@ -359,7 +359,9 @@ class UpdaterData {
                 RepoSource[] sources = mSources.getSources();
                 monitor.setProgressMax(sources.length);
                 for (RepoSource source : sources) {
-                    if (forceFetching || source.getPackages() != null) {
+                    if (forceFetching ||
+                            source.getPackages() != null ||
+                            source.getFetchError() != null) {
                         source.load(monitor.createSubMonitor(1), forceHttp);
                     }
                     monitor.incProgress(1);

tools/sdkmanager/libs/sdkuilib/src/com/android/sdkuilib/internal/repository/icons/ImageFactory.java

@@ -24,6 +24,7 @@ import com.android.sdklib.internal.repository.Package;
 import com.android.sdklib.internal.repository.PlatformPackage;
 import com.android.sdklib.internal.repository.RepoSource;
 import com.android.sdklib.internal.repository.ToolPackage;
+import com.android.sdkuilib.internal.repository.RepoSourcesAdapter;
 
 import org.eclipse.swt.SWTException;
 import org.eclipse.swt.graphics.Image;
@@ -92,6 +93,9 @@ public class ImageFactory {
         if (object instanceof RepoSource) {
             return getImageByName("source_icon16.png");
 
+        } else if (object instanceof RepoSourcesAdapter.RepoSourceError) {
+            return getImageByName("error_icon16.png");
+
         } else if (object instanceof PlatformPackage) {
             return getImageByName("android_icon_16.png");