/*
* Copyright (C) 2008 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.email;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import com.android.email.codec.binary.Base64;
import android.text.Editable;
import android.widget.TextView;
public class Utility {
public final static String readInputStream(InputStream in, String encoding) throws IOException {
InputStreamReader reader = new InputStreamReader(in, encoding);
StringBuffer sb = new StringBuffer();
int count;
char[] buf = new char[512];
while ((count = reader.read(buf)) != -1) {
sb.append(buf, 0, count);
}
return sb.toString();
}
public final static boolean arrayContains(Object[] a, Object o) {
for (int i = 0, count = a.length; i < count; i++) {
if (a[i].equals(o)) {
return true;
}
}
return false;
}
/**
* Combines the given array of Objects into a single string using the
* seperator character and each Object's toString() method. between each
* part.
*
* @param parts
* @param seperator
* @return
*/
public static String combine(Object[] parts, char seperator) {
if (parts == null) {
return null;
}
StringBuffer sb = new StringBuffer();
for (int i = 0; i < parts.length; i++) {
sb.append(parts[i].toString());
if (i < parts.length - 1) {
sb.append(seperator);
}
}
return sb.toString();
}
public static String base64Decode(String encoded) {
if (encoded == null) {
return null;
}
byte[] decoded = new Base64().decode(encoded.getBytes());
return new String(decoded);
}
public static String base64Encode(String s) {
if (s == null) {
return s;
}
byte[] encoded = new Base64().encode(s.getBytes());
return new String(encoded);
}
public static boolean requiredFieldValid(TextView view) {
return view.getText() != null && view.getText().length() > 0;
}
public static boolean requiredFieldValid(Editable s) {
return s != null && s.length() > 0;
}
/**
* Ensures that the given string starts and ends with the double quote character. The string is not modified in any way except to add the
* double quote character to start and end if it's not already there.
*
* TODO: Rename this, because "quoteString()" can mean so many different things.
*
* sample -> "sample"
* "sample" -> "sample"
* ""sample"" -> "sample"
* "sample"" -> "sample"
* sa"mp"le -> "sa"mp"le"
* "sa"mp"le" -> "sa"mp"le"
* (empty string) -> ""
* " -> ""
* @param s
* @return
*/
public static String quoteString(String s) {
if (s == null) {
return null;
}
if (!s.matches("^\".*\"$")) {
return "\"" + s + "\"";
}
else {
return s;
}
}
/**
* Apply quoting rules per IMAP RFC,
* quoted = DQUOTE *QUOTED-CHAR DQUOTE
* QUOTED-CHAR = <any TEXT-CHAR except quoted-specials> / "\" quoted-specials
* quoted-specials = DQUOTE / "\"
*
* This is used primarily for IMAP login, but might be useful elsewhere.
*
* NOTE: Not very efficient - you may wish to preflight this, or perhaps it should check
* for trouble chars before calling the replace functions.
*
* @param s The string to be quoted.
* @return A copy of the string, having undergone quoting as described above
*/
public static String imapQuoted(String s) {
// First, quote any backslashes by replacing \ with \\
// regex Pattern: \\ (Java string const = \\\\)
// Substitute: \\\\ (Java string const = \\\\\\\\)
String result = s.replaceAll("\\\\", "\\\\\\\\");
// Then, quote any double-quotes by replacing " with \"
// regex Pattern: " (Java string const = \")
// Substitute: \\" (Java string const = \\\\\")
result = result.replaceAll("\"", "\\\\\"");
// return string with quotes around it
return "\"" + result + "\"";
}
/**
* A fast version of URLDecoder.decode() that works only with UTF-8 and does only two
* allocations. This version is around 3x as fast as the standard one and I'm using it
* hundreds of times in places that slow down the UI, so it helps.
*/
public static String fastUrlDecode(String s) {
try {
byte[] bytes = s.getBytes("UTF-8");
byte ch;
int length = 0;
for (int i = 0, count = bytes.length; i < count; i++) {
ch = bytes[i];
if (ch == '%') {
int h = (bytes[i + 1] - '0');
int l = (bytes[i + 2] - '0');
if (h > 9) {
h -= 7;
}
if (l > 9) {
l -= 7;
}
bytes[length] = (byte) ((h << 4) | l);
i += 2;
}
else if (ch == '+') {
bytes[length] = ' ';
}
else {
bytes[length] = bytes[i];
}
length++;
}
return new String(bytes, 0, length, "UTF-8");
}
catch (UnsupportedEncodingException uee) {
return null;
}
}
/**
* Returns true if the specified date is within today. Returns false otherwise.
* @param date
* @return
*/
public static boolean isDateToday(Date date) {
// TODO But Calendar is so slowwwwwww....
Date today = new Date();
if (date.getYear() == today.getYear() &&
date.getMonth() == today.getMonth() &&
date.getDate() == today.getDate()) {
return true;
}
return false;
}
/*
* TODO disabled this method globally. It is used in all the settings screens but I just
* noticed that an unrelated icon was dimmed. Android must share drawables internally.
*/
public static void setCompoundDrawablesAlpha(TextView view, int alpha) {
// Drawable[] drawables = view.getCompoundDrawables();
// for (Drawable drawable : drawables) {
// if (drawable != null) {
// drawable.setAlpha(alpha);
// }
// }
}
}