Merge \"DO NOT MERGE add private function convertSafeLable\" into mnc-dev

package com.android.internal.telephony;

import android.annotation.Nullable;

import android.annotation.NonNull;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.PendingIntent;

import android.telephony.TelephonyManager;

import android.text.Html;

import android.text.Spanned;

import android.text.TextPaint;

import android.text.TextUtils;

import android.util.EventLog;

import android.view.LayoutInflater;

    static final String TAG = "SMSDispatcher";    // accessed from inner class

    static final boolean DBG = false;

    private static final String SEND_NEXT_MSG_EXTRA = "SendNextMsg";

    private static final float MAX_LABEL_SIZE_PX = 500f;

    /** Permission required to send SMS to short codes without user confirmation. */

    private static final String SEND_RESPOND_VIA_MESSAGE_PERMISSION =

        PackageManager pm = mContext.getPackageManager();

        try {

            ApplicationInfo appInfo = pm.getApplicationInfo(appPackage, 0);

            return appInfo.loadSafeLabel(pm);

            String label = appInfo.loadLabel(pm).toString();

            return convertSafeLabel(label, appPackage);

        } catch (PackageManager.NameNotFoundException e) {

            Rlog.e(TAG, "PackageManager Name Not Found for package " + appPackage);

            return appPackage;  // fall back to package name if we can't get app label

        }

    }

    /**

     * Check appLabel with the addition that the returned label is safe for being presented

     * in the UI since it will not contain new lines and the length will be limited to a

     * reasonable amount. This prevents a malicious party to influence UI

     * layout via the app label misleading the user into performing a

     * detrimental for them action. If the label is too long it will be

     * truncated and ellipsized at the end.

     *

     * @param label A string of appLabel from PackageItemInfo#loadLabel

     * @param appPackage the package name of the app requesting to send an SMS

     * @return Returns a CharSequence containing the item's label. If the

     * item does not have a label, its name is returned.

     */

    private CharSequence convertSafeLabel(@NonNull String labelStr, String appPackage) {

        // If the label contains new line characters it may push the UI

        // down to hide a part of it. Labels shouldn't have new line

        // characters, so just truncate at the first time one is seen.

        final int labelLength = labelStr.length();

        int offset = 0;

        while (offset < labelLength) {

            final int codePoint = labelStr.codePointAt(offset);

            final int type = Character.getType(codePoint);

            if (type == Character.LINE_SEPARATOR

                    || type == Character.CONTROL

                    || type == Character.PARAGRAPH_SEPARATOR) {

                labelStr = labelStr.substring(0, offset);

                break;

            }

            // replace all non-break space to " " in order to be trimmed

            if (type == Character.SPACE_SEPARATOR) {

                labelStr = labelStr.substring(0, offset) + " " + labelStr.substring(offset +

                        Character.charCount(codePoint));

            }

            offset += Character.charCount(codePoint);

        }

        labelStr = labelStr.trim();

        if (labelStr.isEmpty()) {

            return appPackage;

        }

        TextPaint paint = new TextPaint();

        paint.setTextSize(42);

        return TextUtils.ellipsize(labelStr, paint, MAX_LABEL_SIZE_PX,

                TextUtils.TruncateAt.END);

    }

    /**

     * Post an alert when SMS needs confirmation due to excessive usage.

     * @param tracker an SmsTracker for the current message.