1 files changed, 201 insertions, 0 deletions
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpListPreference.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpListPreference.java
new file mode 100644
index 000000000..4ddd97485
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpListPreference.java
@@ -0,0 +1,201 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * 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 org.openintents.openpgp;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import android.app.AlertDialog.Builder;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.pm.ServiceInfo;
+import android.graphics.drawable.Drawable;
+import android.preference.DialogPreference;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ListAdapter;
+import android.widget.TextView;
+
+public class OpenPgpListPreference extends DialogPreference {
+    ArrayList<OpenPgpProviderEntry> mProviderList = new ArrayList<OpenPgpProviderEntry>();
+    private String mSelectedPackage;
+
+    public OpenPgpListPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(
+                new Intent(OpenPgpConstants.SERVICE_INTENT), PackageManager.GET_META_DATA);
+        if (!resInfo.isEmpty()) {
+            for (ResolveInfo resolveInfo : resInfo) {
+                if (resolveInfo.serviceInfo == null)
+                    continue;
+
+                String packageName = resolveInfo.serviceInfo.packageName;
+                String simpleName = String.valueOf(resolveInfo.serviceInfo.loadLabel(context
+                        .getPackageManager()));
+                Drawable icon = resolveInfo.serviceInfo.loadIcon(context.getPackageManager());
+
+                // get api version
+                ServiceInfo si = resolveInfo.serviceInfo;
+                int apiVersion = si.metaData.getInt("api_version");
+
+                mProviderList.add(new OpenPgpProviderEntry(packageName, simpleName, icon,
+                        apiVersion));
+            }
+        }
+    }
+
+    public OpenPgpListPreference(Context context) {
+        this(context, null);
+    }
+
+    /**
+     * Can be used to add "no selection"
+     * 
+     * @param packageName
+     * @param simpleName
+     * @param icon
+     */
+    public void addProvider(int position, String packageName, String simpleName, Drawable icon,
+            int apiVersion) {
+        mProviderList.add(position, new OpenPgpProviderEntry(packageName, simpleName, icon,
+                apiVersion));
+    }
+
+    @Override
+    protected void onPrepareDialogBuilder(Builder builder) {
+        // Init ArrayAdapter with OpenPGP Providers
+        ListAdapter adapter = new ArrayAdapter<OpenPgpProviderEntry>(getContext(),
+                android.R.layout.select_dialog_singlechoice, android.R.id.text1, mProviderList) {
+            public View getView(int position, View convertView, ViewGroup parent) {
+                // User super class to create the View
+                View v = super.getView(position, convertView, parent);
+                TextView tv = (TextView) v.findViewById(android.R.id.text1);
+
+                // Put the image on the TextView
+                tv.setCompoundDrawablesWithIntrinsicBounds(mProviderList.get(position).icon, null,
+                        null, null);
+
+                // Add margin between image and text (support various screen densities)
+                int dp10 = (int) (10 * getContext().getResources().getDisplayMetrics().density + 0.5f);
+                tv.setCompoundDrawablePadding(dp10);
+
+                // disable if it has the wrong api_version
+                if (mProviderList.get(position).apiVersion == OpenPgpConstants.REQUIRED_API_VERSION) {
+                    tv.setEnabled(true);
+                } else {
+                    tv.setEnabled(false);
+                    tv.setText(tv.getText() + " (API v" + mProviderList.get(position).apiVersion
+                            + ", needs v" + OpenPgpConstants.REQUIRED_API_VERSION + ")");
+                }
+
+                return v;
+            }
+        };
+
+        builder.setSingleChoiceItems(adapter, getIndexOfProviderList(getValue()),
+                new DialogInterface.OnClickListener() {
+
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        mSelectedPackage = mProviderList.get(which).packageName;
+
+                        /*
+                         * Clicking on an item simulates the positive button click, and dismisses
+                         * the dialog.
+                         */
+                        OpenPgpListPreference.this.onClick(dialog, DialogInterface.BUTTON_POSITIVE);
+                        dialog.dismiss();
+                    }
+                });
+
+        /*
+         * The typical interaction for list-based dialogs is to have click-on-an-item dismiss the
+         * dialog instead of the user having to press 'Ok'.
+         */
+        builder.setPositiveButton(null, null);
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+
+        if (positiveResult && (mSelectedPackage != null)) {
+            if (callChangeListener(mSelectedPackage)) {
+                setValue(mSelectedPackage);
+            }
+        }
+    }
+
+    private int getIndexOfProviderList(String packageName) {
+        for (OpenPgpProviderEntry app : mProviderList) {
+            if (app.packageName.equals(packageName)) {
+                return mProviderList.indexOf(app);
+            }
+        }
+
+        return -1;
+    }
+
+    public void setValue(String packageName) {
+        mSelectedPackage = packageName;
+        persistString(packageName);
+    }
+
+    public String getValue() {
+        return mSelectedPackage;
+    }
+
+    public String getEntry() {
+        return getEntryByValue(mSelectedPackage);
+    }
+
+    public String getEntryByValue(String packageName) {
+        for (OpenPgpProviderEntry app : mProviderList) {
+            if (app.packageName.equals(packageName)) {
+                return app.simpleName;
+            }
+        }
+
+        return null;
+    }
+
+    private static class OpenPgpProviderEntry {
+        private String packageName;
+        private String simpleName;
+        private Drawable icon;
+        private int apiVersion;
+
+        public OpenPgpProviderEntry(String packageName, String simpleName, Drawable icon,
+                int apiVersion) {
+            this.packageName = packageName;
+            this.simpleName = simpleName;
+            this.icon = icon;
+            this.apiVersion = apiVersion;
+        }
+
+        @Override
+        public String toString() {
+            return simpleName;
+        }
+    }
+}