move android-common from framework/base to framework/ex

Also change the LOCAL_SDK_VERSION from current to 8.
Change-Id: I68943b8b41622dab88c7b13d8c067b39205f028e

1 files changed, 134 insertions, 0 deletions

diff --git a/common/java/com/android/common/Rfc822Validator.java b/common/java/com/android/common/Rfc822Validator.java
new file mode 100644
index 0000000..087e425
--- /dev/null
+++ b/common/java/com/android/common/Rfc822Validator.java
@@ -0,0 +1,134 @@
+/*
+ * 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.common;
+
+import android.text.TextUtils;
+import android.text.util.Rfc822Token;
+import android.text.util.Rfc822Tokenizer;
+import android.widget.AutoCompleteTextView;
+
+import java.util.regex.Pattern;
+
+/**
+ * This class works as a Validator for AutoCompleteTextView for
+ * email addresses.  If a token does not appear to be a valid address,
+ * it is trimmed of characters that cannot legitimately appear in one
+ * and has the specified domain name added.  It is meant for use with
+ * {@link Rfc822Token} and {@link Rfc822Tokenizer}.
+ *
+ * @deprecated In the future make sure we don't quietly alter the user's
+ *             text in ways they did not intend.  Meanwhile, hide this
+ *             class from the public API because it does not even have
+ *             a full understanding of the syntax it claims to correct.
+ * @hide
+ */
+public class Rfc822Validator implements AutoCompleteTextView.Validator {
+    /*
+     * Regex.EMAIL_ADDRESS_PATTERN hardcodes the TLD that we accept, but we
+     * want to make sure we will keep accepting email addresses with TLD's
+     * that don't exist at the time of this writing, so this regexp relaxes
+     * that constraint by accepting any kind of top level domain, not just
+     * ".com", ".fr", etc...
+     */
+    private static final Pattern EMAIL_ADDRESS_PATTERN =
+            Pattern.compile("[^\\s@]+@[^\\s@]+\\.[a-zA-z][a-zA-Z][a-zA-Z]*");
+
+    private String mDomain;
+
+    /**
+     * Constructs a new validator that uses the specified domain name as
+     * the default when none is specified.
+     */
+    public Rfc822Validator(String domain) {
+        mDomain = domain;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public boolean isValid(CharSequence text) {
+        Rfc822Token[] tokens = Rfc822Tokenizer.tokenize(text);
+
+        return tokens.length == 1 &&
+               EMAIL_ADDRESS_PATTERN.
+                   matcher(tokens[0].getAddress()).matches();
+    }
+
+    /**
+     * @return a string in which all the characters that are illegal for the username
+     * or the domain name part of the email address have been removed.
+     */
+    private String removeIllegalCharacters(String s) {
+        StringBuilder result = new StringBuilder();
+        int length = s.length();
+        for (int i = 0; i < length; i++) {
+            char c = s.charAt(i);
+
+            /*
+             * An RFC822 atom can contain any ASCII printing character
+             * except for periods and any of the following punctuation.
+             * A local-part can contain multiple atoms, concatenated by
+             * periods, so do allow periods here.
+             */
+
+            if (c <= ' ' || c > '~') {
+                continue;
+            }
+
+            if (c == '(' || c == ')' || c == '<' || c == '>' ||
+                c == '@' || c == ',' || c == ';' || c == ':' ||
+                c == '\\' || c == '"' || c == '[' || c == ']') {
+                continue;
+            }
+
+            result.append(c);
+        }
+        return result.toString();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public CharSequence fixText(CharSequence cs) {
+        // Return an empty string if the email address only contains spaces, \n or \t
+        if (TextUtils.getTrimmedLength(cs) == 0) return "";
+
+        Rfc822Token[] tokens = Rfc822Tokenizer.tokenize(cs);
+        StringBuilder sb = new StringBuilder();
+
+        for (int i = 0; i < tokens.length; i++) {
+            String text = tokens[i].getAddress();
+            int index = text.indexOf('@');
+            if (index < 0) {
+                // If there is no @, just append the domain of the account
+                tokens[i].setAddress(removeIllegalCharacters(text) + "@" + mDomain);
+            } else {
+                // Otherwise, remove the illegal characters on both sides of the '@'
+                String fix = removeIllegalCharacters(text.substring(0, index));
+                String domain = removeIllegalCharacters(text.substring(index + 1));
+                tokens[i].setAddress(fix + "@" + (domain.length() != 0 ? domain : mDomain));
+            }
+
+            sb.append(tokens[i].toString());
+            if (i + 1 < tokens.length) {
+                sb.append(", ");
+            }
+        }
+
+        return sb;
+    }
+}