mirror of
https://github.com/moparisthebest/k-9
synced 2024-11-16 22:45:04 -05:00
670 lines
24 KiB
Java
670 lines
24 KiB
Java
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package com.fsck.k9.helper;
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import android.app.Application;
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import android.content.Context;
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import android.database.Cursor;
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import android.net.ConnectivityManager;
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import android.net.NetworkInfo;
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import android.text.Editable;
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import android.util.Log;
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import android.widget.EditText;
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import android.widget.TextView;
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import com.fsck.k9.K9;
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import com.fsck.k9.mail.filter.Base64;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.UnsupportedEncodingException;
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import java.util.Date;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class Utility {
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/**
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* Regular expression that represents characters we won't allow in file names.
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*
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* <p>
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* Allowed are:
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* <ul>
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* <li>word characters (letters, digits, and underscores): {@code \w}</li>
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* <li>spaces: {@code " "}</li>
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* <li>special characters: {@code !}, {@code #}, {@code $}, {@code %}, {@code &}, {@code '},
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* {@code (}, {@code )}, {@code -}, {@code @}, {@code ^}, {@code `}, <code>{</code>,
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* <code>}</code>, {@code ~}, {@code .}, {@code ,}</li>
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* </ul></p>
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*
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* @see #sanitizeFilename(String)
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*/
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private static final String INVALID_CHARACTERS = "[^\\w !#$%&'()\\-@\\^`{}~.,]+";
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/**
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* Invalid characters in a file name are replaced by this character.
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*
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* @see #sanitizeFilename(String)
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*/
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private static final String REPLACEMENT_CHARACTER = "_";
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// \u00A0 (non-breaking space) happens to be used by French MUA
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// Note: no longer using the ^ beginning character combined with (...)+
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// repetition matching as we might want to strip ML tags. Ex:
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// Re: [foo] Re: RE : [foo] blah blah blah
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private static final Pattern RESPONSE_PATTERN = Pattern.compile(
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"((Re|Fw|Fwd|Aw|R\\u00E9f\\.)(\\[\\d+\\])?[\\u00A0 ]?: *)+", Pattern.CASE_INSENSITIVE);
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/**
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* Mailing-list tag pattern to match strings like "[foobar] "
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*/
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private static final Pattern TAG_PATTERN = Pattern.compile("\\[[-_a-z0-9]+\\] ",
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Pattern.CASE_INSENSITIVE);
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public static boolean arrayContains(Object[] a, Object o) {
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for (Object element : a) {
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if (element.equals(o)) {
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return true;
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}
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}
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return false;
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}
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/**
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* Combines the given array of Objects into a single String using
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* each Object's toString() method and the separator character
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* between each part.
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*
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* @param parts
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* @param separator
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* @return new String
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*/
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public static String combine(Object[] parts, char separator) {
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if (parts == null) {
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return null;
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} else if (parts.length == 0) {
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return "";
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} else if (parts.length == 1) {
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return parts[0].toString();
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}
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StringBuilder sb = new StringBuilder();
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sb.append(parts[0]);
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for (int i = 1; i < parts.length; ++i) {
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sb.append(separator);
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sb.append(parts[i]);
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}
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return sb.toString();
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}
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public static String base64Decode(String encoded) {
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if (encoded == null) {
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return null;
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}
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byte[] decoded = new Base64().decode(encoded.getBytes());
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return new String(decoded);
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}
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public static String base64Encode(String s) {
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if (s == null) {
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return s;
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}
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byte[] encoded = new Base64().encode(s.getBytes());
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return new String(encoded);
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}
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public static boolean requiredFieldValid(TextView view) {
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return view.getText() != null && view.getText().length() > 0;
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}
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public static boolean requiredFieldValid(Editable s) {
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return s != null && s.length() > 0;
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}
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public static boolean domainFieldValid(EditText view) {
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if (view.getText() != null) {
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String s = view.getText().toString();
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if (s.matches("^([a-zA-Z0-9]([a-zA-Z0-9\\-]{0,61}[a-zA-Z0-9])?\\.)*[a-zA-Z0-9]([a-zA-Z0-9\\-]{0,61}[a-zA-Z0-9])?$") &&
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s.length() <= 253) {
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return true;
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}
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if (s.matches("^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$")) {
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return true;
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}
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}
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return false;
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}
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private static final Pattern ATOM = Pattern.compile("^(?:[a-zA-Z0-9!#$%&'*+\\-/=?^_`{|}~]|\\s)+$");
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/**
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* Quote a string, if necessary, based upon the definition of an "atom," as defined by RFC2822
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* (http://tools.ietf.org/html/rfc2822#section-3.2.4). Strings that consist purely of atoms are
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* left unquoted; anything else is returned as a quoted string.
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* @param text String to quote.
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* @return Possibly quoted string.
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*/
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public static String quoteAtoms(final String text) {
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if (ATOM.matcher(text).matches()) {
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return text;
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} else {
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return quoteString(text);
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}
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}
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/**
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* 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
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* double quote character to start and end if it's not already there.
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* sample -> "sample"
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* "sample" -> "sample"
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* ""sample"" -> "sample"
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* "sample"" -> "sample"
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* sa"mp"le -> "sa"mp"le"
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* "sa"mp"le" -> "sa"mp"le"
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* (empty string) -> ""
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* " -> ""
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* @param s
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* @return
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*/
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public static String quoteString(String s) {
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if (s == null) {
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return null;
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}
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if (!s.matches("^\".*\"$")) {
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return "\"" + s + "\"";
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} else {
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return s;
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}
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}
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/**
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* A fast version of URLDecoder.decode() that works only with UTF-8 and does only two
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* allocations. This version is around 3x as fast as the standard one and I'm using it
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* hundreds of times in places that slow down the UI, so it helps.
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*/
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public static String fastUrlDecode(String s) {
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try {
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byte[] bytes = s.getBytes("UTF-8");
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byte ch;
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int length = 0;
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for (int i = 0, count = bytes.length; i < count; i++) {
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ch = bytes[i];
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if (ch == '%') {
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int h = (bytes[i + 1] - '0');
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int l = (bytes[i + 2] - '0');
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if (h > 9) {
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h -= 7;
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}
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if (l > 9) {
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l -= 7;
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}
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bytes[length] = (byte)((h << 4) | l);
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i += 2;
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} else if (ch == '+') {
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bytes[length] = ' ';
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} else {
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bytes[length] = bytes[i];
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}
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length++;
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}
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return new String(bytes, 0, length, "UTF-8");
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} catch (UnsupportedEncodingException uee) {
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return null;
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}
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}
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private static final long MILISECONDS_IN_18_HOURS = 18 * 60 * 60 * 1000;
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/**
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* Check a date to see if it was from "today."
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* @param date Date of item to check.
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* @return true if the specified date is within 18 hours of now.
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*/
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public static boolean isDateToday(final Date date) {
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if (date == null) {
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return false;
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}
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final Date now = new Date();
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if (now.getTime() - MILISECONDS_IN_18_HOURS > date.getTime() || now.getTime() + MILISECONDS_IN_18_HOURS < date.getTime()) {
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return false;
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} else {
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return true;
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}
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}
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/*
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* TODO disabled this method globally. It is used in all the settings screens but I just
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* noticed that an unrelated icon was dimmed. Android must share drawables internally.
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*/
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public static void setCompoundDrawablesAlpha(TextView view, int alpha) {
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// Drawable[] drawables = view.getCompoundDrawables();
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// for (Drawable drawable : drawables) {
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// if (drawable != null) {
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// drawable.setAlpha(alpha);
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// }
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// }
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}
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/**
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* <p>Wraps a multiline string of text, identifying words by <code>' '</code>.</p>
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*
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* <p>New lines will be separated by the system property line separator.
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* Very long words, such as URLs will <i>not</i> be wrapped.</p>
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*
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* <p>Leading spaces on a new line are stripped.
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* Trailing spaces are not stripped.</p>
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*
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* <pre>
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* WordUtils.wrap(null, *) = null
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* WordUtils.wrap("", *) = ""
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* </pre>
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*
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* Adapted from the Apache Commons Lang library.
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* http://svn.apache.org/viewvc/commons/proper/lang
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* /trunk/src/main/java/org/apache/commons/lang3/text/WordUtils.java
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* SVN Revision 925967, Mon Mar 22 06:16:49 2010 UTC
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @param str the String to be word wrapped, may be null
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* @param wrapLength the column to wrap the words at, less than 1 is treated as 1
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* @return a line with newlines inserted, <code>null</code> if null input
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*/
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private static final String NEWLINE_REGEX = "(?:\\r?\\n)";
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public static String wrap(String str, int wrapLength) {
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StringBuilder result = new StringBuilder();
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for (String piece : str.split(NEWLINE_REGEX)) {
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result.append(wrap(piece, wrapLength, null, false));
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result.append("\n");
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}
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return result.toString();
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}
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/**
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* <p>Wraps a single line of text, identifying words by <code>' '</code>.</p>
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*
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* <p>Leading spaces on a new line are stripped.
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* Trailing spaces are not stripped.</p>
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*
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* <pre>
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* WordUtils.wrap(null, *, *, *) = null
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* WordUtils.wrap("", *, *, *) = ""
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* </pre>
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*
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* This is from the Apache Commons Lang library.
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* http://svn.apache.org/viewvc/commons/proper/lang
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* /trunk/src/main/java/org/apache/commons/lang3/text/WordUtils.java
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* SVN Revision 925967, Mon Mar 22 06:16:49 2010 UTC
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @param str the String to be word wrapped, may be null
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* @param wrapLength the column to wrap the words at, less than 1 is treated as 1
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* @param newLineStr the string to insert for a new line,
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* <code>null</code> uses the system property line separator
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* @param wrapLongWords true if long words (such as URLs) should be wrapped
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* @return a line with newlines inserted, <code>null</code> if null input
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*/
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public static String wrap(String str, int wrapLength, String newLineStr, boolean wrapLongWords) {
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if (str == null) {
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return null;
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}
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if (newLineStr == null) {
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newLineStr = "\n";
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}
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if (wrapLength < 1) {
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wrapLength = 1;
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}
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int inputLineLength = str.length();
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int offset = 0;
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StringBuilder wrappedLine = new StringBuilder(inputLineLength + 32);
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while ((inputLineLength - offset) > wrapLength) {
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if (str.charAt(offset) == ' ') {
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offset++;
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continue;
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}
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int spaceToWrapAt = str.lastIndexOf(' ', wrapLength + offset);
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if (spaceToWrapAt >= offset) {
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// normal case
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wrappedLine.append(str.substring(offset, spaceToWrapAt));
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wrappedLine.append(newLineStr);
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offset = spaceToWrapAt + 1;
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} else {
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// really long word or URL
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if (wrapLongWords) {
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// wrap really long word one line at a time
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wrappedLine.append(str.substring(offset, wrapLength + offset));
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wrappedLine.append(newLineStr);
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offset += wrapLength;
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} else {
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// do not wrap really long word, just extend beyond limit
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spaceToWrapAt = str.indexOf(' ', wrapLength + offset);
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if (spaceToWrapAt >= 0) {
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wrappedLine.append(str.substring(offset, spaceToWrapAt));
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wrappedLine.append(newLineStr);
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offset = spaceToWrapAt + 1;
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} else {
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wrappedLine.append(str.substring(offset));
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offset = inputLineLength;
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}
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}
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}
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}
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// Whatever is left in line is short enough to just pass through
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wrappedLine.append(str.substring(offset));
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return wrappedLine.toString();
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}
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/**
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* Extract the 'original' subject value, by ignoring leading
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* response/forward marker and '[XX]' formatted tags (as many mailing-list
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* softwares do).
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*
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* <p>
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* Result is also trimmed.
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* </p>
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*
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* @param subject
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* Never <code>null</code>.
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* @return Never <code>null</code>.
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*/
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public static String stripSubject(final String subject) {
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int lastPrefix = 0;
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final Matcher tagMatcher = TAG_PATTERN.matcher(subject);
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String tag = null;
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// whether tag stripping logic should be active
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boolean tagPresent = false;
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// whether the last action stripped a tag
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boolean tagStripped = false;
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if (tagMatcher.find(0)) {
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tagPresent = true;
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if (tagMatcher.start() == 0) {
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// found at beginning of subject, considering it an actual tag
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tag = tagMatcher.group();
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// now need to find response marker after that tag
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lastPrefix = tagMatcher.end();
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tagStripped = true;
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}
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}
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final Matcher matcher = RESPONSE_PATTERN.matcher(subject);
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// while:
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// - lastPrefix is within the bounds
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// - response marker found at lastPrefix position
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// (to make sure we don't catch response markers that are part of
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// the actual subject)
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while (lastPrefix < subject.length() - 1
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&& matcher.find(lastPrefix)
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&& matcher.start() == lastPrefix
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&& (!tagPresent || tag == null || subject.regionMatches(matcher.end(), tag, 0,
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tag.length()))) {
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lastPrefix = matcher.end();
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if (tagPresent) {
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tagStripped = false;
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if (tag == null) {
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// attempt to find tag
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if (tagMatcher.start() == lastPrefix) {
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tag = tagMatcher.group();
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lastPrefix += tag.length();
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tagStripped = true;
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}
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} else if (lastPrefix < subject.length() - 1 && subject.startsWith(tag, lastPrefix)) {
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// Re: [foo] Re: [foo] blah blah blah
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// ^ ^
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// ^ ^
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// ^ new position
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// ^
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// initial position
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lastPrefix += tag.length();
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tagStripped = true;
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}
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}
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}
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// Null pointer check is to make the static analysis component of Eclipse happy.
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if (tagStripped && (tag != null)) {
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// restore the last tag
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lastPrefix -= tag.length();
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}
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if (lastPrefix > -1 && lastPrefix < subject.length() - 1) {
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return subject.substring(lastPrefix).trim();
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} else {
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return subject.trim();
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}
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}
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/**
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* @param parentDir
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* @param name
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* Never <code>null</code>.
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*/
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public static void touchFile(final File parentDir, final String name) {
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final File file = new File(parentDir, name);
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try {
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if (!file.exists()) {
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file.createNewFile();
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} else {
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file.setLastModified(System.currentTimeMillis());
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}
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} catch (Exception e) {
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Log.d(K9.LOG_TAG, "Unable to touch file: " + file.getAbsolutePath(), e);
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}
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}
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/**
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* Creates a unique file in the given directory by appending a hyphen
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* and a number to the given filename.
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*
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* @param directory
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* @param filename
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* @return
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*/
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public static File createUniqueFile(File directory, String filename) {
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File file = new File(directory, filename);
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if (!file.exists()) {
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return file;
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}
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// Get the extension of the file, if any.
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int index = filename.lastIndexOf('.');
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String format;
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if (index != -1) {
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String name = filename.substring(0, index);
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String extension = filename.substring(index);
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format = name + "-%d" + extension;
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} else {
|
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format = filename + "-%d";
|
|
}
|
|
for (int i = 2; i < Integer.MAX_VALUE; i++) {
|
|
file = new File(directory, String.format(format, i));
|
|
if (!file.exists()) {
|
|
return file;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* @param from
|
|
* @param to
|
|
* @return
|
|
*/
|
|
public static boolean move(final File from, final File to) {
|
|
if (to.exists()) {
|
|
to.delete();
|
|
}
|
|
to.getParentFile().mkdirs();
|
|
|
|
try {
|
|
FileInputStream in = new FileInputStream(from);
|
|
try {
|
|
FileOutputStream out = new FileOutputStream(to);
|
|
try {
|
|
byte[] buffer = new byte[1024];
|
|
int count = -1;
|
|
while ((count = in.read(buffer)) > 0) {
|
|
out.write(buffer, 0, count);
|
|
}
|
|
} finally {
|
|
out.close();
|
|
}
|
|
} finally {
|
|
try { in.close(); } catch (Throwable ignore) {}
|
|
}
|
|
from.delete();
|
|
return true;
|
|
} catch (Exception e) {
|
|
Log.w(K9.LOG_TAG, "cannot move " + from.getAbsolutePath() + " to " + to.getAbsolutePath(), e);
|
|
return false;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* @param fromDir
|
|
* @param toDir
|
|
*/
|
|
public static void moveRecursive(final File fromDir, final File toDir) {
|
|
if (!fromDir.exists()) {
|
|
return;
|
|
}
|
|
if (!fromDir.isDirectory()) {
|
|
if (toDir.exists()) {
|
|
if (!toDir.delete()) {
|
|
Log.w(K9.LOG_TAG, "cannot delete already existing file/directory " + toDir.getAbsolutePath());
|
|
}
|
|
}
|
|
if (!fromDir.renameTo(toDir)) {
|
|
Log.w(K9.LOG_TAG, "cannot rename " + fromDir.getAbsolutePath() + " to " + toDir.getAbsolutePath() + " - moving instead");
|
|
move(fromDir, toDir);
|
|
}
|
|
return;
|
|
}
|
|
if (!toDir.exists() || !toDir.isDirectory()) {
|
|
if (toDir.exists()) {
|
|
toDir.delete();
|
|
}
|
|
if (!toDir.mkdirs()) {
|
|
Log.w(K9.LOG_TAG, "cannot create directory " + toDir.getAbsolutePath());
|
|
}
|
|
}
|
|
File[] files = fromDir.listFiles();
|
|
for (File file : files) {
|
|
if (file.isDirectory()) {
|
|
moveRecursive(file, new File(toDir, file.getName()));
|
|
file.delete();
|
|
} else {
|
|
File target = new File(toDir, file.getName());
|
|
if (!file.renameTo(target)) {
|
|
Log.w(K9.LOG_TAG, "cannot rename " + file.getAbsolutePath() + " to " + target.getAbsolutePath() + " - moving instead");
|
|
move(file, target);
|
|
}
|
|
}
|
|
}
|
|
if (!fromDir.delete()) {
|
|
Log.w(K9.LOG_TAG, "cannot delete " + fromDir.getAbsolutePath());
|
|
}
|
|
}
|
|
|
|
private static final String IMG_SRC_REGEX = "(?is:<img[^>]+src\\s*=\\s*['\"]?([a-z]+)\\:)";
|
|
private static final Pattern IMG_PATTERN = Pattern.compile(IMG_SRC_REGEX);
|
|
/**
|
|
* Figure out if this part has images.
|
|
* TODO: should only return true if we're an html part
|
|
* @param message Content to evaluate
|
|
* @return True if it has external images; false otherwise.
|
|
*/
|
|
public static boolean hasExternalImages(final String message) {
|
|
Matcher imgMatches = IMG_PATTERN.matcher(message);
|
|
while (imgMatches.find()) {
|
|
if (!imgMatches.group(1).equals("content")) {
|
|
if (K9.DEBUG) {
|
|
Log.d(K9.LOG_TAG, "External images found");
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
if (K9.DEBUG) {
|
|
Log.d(K9.LOG_TAG, "No external images.");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Unconditionally close a Cursor. Equivalent to {@link Cursor#close()},
|
|
* if cursor is non-null. This is typically used in finally blocks.
|
|
*
|
|
* @param cursor cursor to close
|
|
*/
|
|
public static void closeQuietly(final Cursor cursor) {
|
|
if (cursor != null) {
|
|
cursor.close();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Replace characters we don't allow in file names with a replacement character.
|
|
*
|
|
* @param filename
|
|
* The original file name.
|
|
*
|
|
* @return The sanitized file name containing only allowed characters.
|
|
*/
|
|
public static String sanitizeFilename(String filename) {
|
|
return filename.replaceAll(INVALID_CHARACTERS, REPLACEMENT_CHARACTER);
|
|
}
|
|
|
|
/**
|
|
* Check to see if we have network connectivity.
|
|
* @param app Current application (Hint: see if your base class has a getApplication() method.)
|
|
* @return true if we have connectivity, false otherwise.
|
|
*/
|
|
public static boolean hasConnectivity(final Application app) {
|
|
final ConnectivityManager connectivityManager =
|
|
(ConnectivityManager) app.getSystemService(Context.CONNECTIVITY_SERVICE);
|
|
if (connectivityManager == null) {
|
|
return false;
|
|
}
|
|
final NetworkInfo netInfo = connectivityManager.getActiveNetworkInfo();
|
|
if (netInfo != null && netInfo.getState() == NetworkInfo.State.CONNECTED) {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
}
|