src/third_party/WebKit/Source/core/html/forms/EmailInputType.cpp

   1 /*
   2  * This file is part of the WebKit project.
   3  *
   4  * Copyright (C) 2009 Michelangelo De Simone <micdesim@gmail.com>
   5  * Copyright (C) 2010 Google Inc. All rights reserved.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Library General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Library General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Library General Public License
  18  * along with this library; see the file COPYING.LIB.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20  * Boston, MA 02110-1301, USA.
  21  *
  22  */
  23
  24 #include "config.h"
  25 #include "core/html/forms/EmailInputType.h"
  26
  27 #include "bindings/core/v8/ScriptRegexp.h"
  28 #include "core/InputTypeNames.h"
  29 #include "core/html/HTMLInputElement.h"
  30 #include "core/html/parser/HTMLParserIdioms.h"
  31 #include "core/page/Chrome.h"
  32 #include "core/page/ChromeClient.h"
  33 #include "platform/text/PlatformLocale.h"
  34 #include "public/platform/Platform.h"
  35 #include "wtf/PassOwnPtr.h"
  36 #include "wtf/text/StringBuilder.h"
  37 #include <unicode/idna.h>
  38 #include <unicode/unistr.h>
  39
  40 namespace blink {
  41
  42 using blink::WebLocalizedString;
  43
  44 // http://www.whatwg.org/specs/web-apps/current-work/multipage/states-of-the-type-attribute.html#valid-e-mail-address
  45 static const char localPartCharacters[] = "abcdefghijklmnopqrstuvwxyz0123456789!#$%&'*+/=?^_`{|}~.-";
  46 static const char emailPattern[] =
  47     "[a-z0-9!#$%&'*+/=?^_`{|}~.-]+" // local part
  48     "@"
  49     "[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?" // domain part
  50     "(?:\\.[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?)*";
  51
  52 // RFC5321 says the maximum total length of a domain name is 255 octets.
  53 static const int32_t maximumDomainNameLength = 255;
  54 // Use the same option as in url/url_canon_icu.cc
  55 static const int32_t idnaConversionOption = UIDNA_CHECK_BIDI;
  56
  57 static String convertEmailAddressToASCII(const String& address)
  58 {
  59     if (address.containsOnlyASCII())
  60         return address;
  61
  62     size_t atPosition = address.find('@');
  63     if (atPosition == kNotFound)
  64         return address;
  65
  66     // UnicodeString ctor for copy-on-write does not work reliably (in debug
  67     // build.) TODO(jshin): In an unlikely case this is a perf-issue, treat
  68     // 8bit and non-8bit strings separately.
  69     icu::UnicodeString idnDomainName(address.charactersWithNullTermination().data() + atPosition + 1, address.length() - atPosition - 1);
  70     icu::UnicodeString domainName;
  71
  72     // Leak |idna| at the end.
  73     UErrorCode errorCode = U_ZERO_ERROR;
  74     static icu::IDNA *idna = icu::IDNA::createUTS46Instance(idnaConversionOption, errorCode);
  75     ASSERT(idna);
  76     icu::IDNAInfo idnaInfo;
  77     idna->nameToASCII(idnDomainName, domainName, idnaInfo, errorCode);
  78     if (U_FAILURE(errorCode) || idnaInfo.hasErrors() || domainName.length() > maximumDomainNameLength)
  79         return address;
  80
  81     StringBuilder builder;
  82     builder.append(address, 0, atPosition + 1);
  83     builder.append(domainName.getBuffer(), domainName.length());
  84     return builder.toString();
  85 }
  86
  87 String EmailInputType::convertEmailAddressToUnicode(const String& address) const
  88 {
  89     if (!address.containsOnlyASCII())
  90         return address;
  91
  92     size_t atPosition = address.find('@');
  93     if (atPosition == kNotFound)
  94         return address;
  95
  96     if (address.find("xn--", atPosition + 1) == kNotFound)
  97         return address;
  98
  99     if (!chrome())
 100         return address;
 101
 102     String languages = chrome()->client().acceptLanguages();
 103     String unicodeHost = blink::Platform::current()->convertIDNToUnicode(address.substring(atPosition + 1), languages);
 104     StringBuilder builder;
 105     builder.append(address, 0, atPosition + 1);
 106     builder.append(unicodeHost);
 107     return builder.toString();
 108 }
 109
 110 static bool isInvalidLocalPartCharacter(UChar ch)
 111 {
 112     if (!isASCII(ch))
 113         return true;
 114     DEFINE_STATIC_LOCAL(const String, validCharacters, (localPartCharacters));
 115     return validCharacters.find(toASCIILower(ch)) == kNotFound;
 116 }
 117
 118 static bool isInvalidDomainCharacter(UChar ch)
 119 {
 120     if (!isASCII(ch))
 121         return true;
 122     return !isASCIILower(ch) && !isASCIIUpper(ch) && !isASCIIDigit(ch) && ch != '.' && ch != '-';
 123 }
 124
 125 static bool checkValidDotUsage(const String& domain)
 126 {
 127     if (domain.isEmpty())
 128         return true;
 129     if (domain[0] == '.' || domain[domain.length() - 1] == '.')
 130         return false;
 131     return domain.find("..") == kNotFound;
 132 }
 133
 134 static bool isValidEmailAddress(const String& address)
 135 {
 136     int addressLength = address.length();
 137     if (!addressLength)
 138         return false;
 139
 140     DEFINE_STATIC_LOCAL(const ScriptRegexp, regExp, (emailPattern, TextCaseInsensitive));
 141
 142     int matchLength;
 143     int matchOffset = regExp.match(address, 0, &matchLength);
 144
 145     return !matchOffset && matchLength == addressLength;
 146 }
 147
 148 PassRefPtrWillBeRawPtr<InputType> EmailInputType::create(HTMLInputElement& element)
 149 {
 150     return adoptRefWillBeNoop(new EmailInputType(element));
 151 }
 152
 153 void EmailInputType::countUsage()
 154 {
 155     countUsageIfVisible(UseCounter::InputTypeEmail);
 156     bool hasMaxLength = element().fastHasAttribute(HTMLNames::maxlengthAttr);
 157     if (hasMaxLength)
 158         countUsageIfVisible(UseCounter::InputTypeEmailMaxLength);
 159     if (element().multiple()) {
 160         countUsageIfVisible(UseCounter::InputTypeEmailMultiple);
 161         if (hasMaxLength)
 162             countUsageIfVisible(UseCounter::InputTypeEmailMultipleMaxLength);
 163     }
 164 }
 165
 166 const AtomicString& EmailInputType::formControlType() const
 167 {
 168     return InputTypeNames::email;
 169 }
 170
 171 // The return value is an invalid email address string if the specified string
 172 // contains an invalid email address. Otherwise, null string is returned.
 173 // If an empty string is returned, it means empty address is specified.
 174 // e.g. "foo@example.com,,bar@example.com" for multiple case.
 175 String EmailInputType::findInvalidAddress(const String& value) const
 176 {
 177     if (value.isEmpty())
 178         return String();
 179     if (!element().multiple())
 180         return isValidEmailAddress(value) ? String() : value;
 181     Vector<String> addresses;
 182     value.split(',', true, addresses);
 183     for (unsigned i = 0; i < addresses.size(); ++i) {
 184         String stripped = stripLeadingAndTrailingHTMLSpaces(addresses[i]);
 185         if (!isValidEmailAddress(stripped))
 186             return stripped;
 187     }
 188     return String();
 189 }
 190
 191 bool EmailInputType::typeMismatchFor(const String& value) const
 192 {
 193     return !findInvalidAddress(value).isNull();
 194 }
 195
 196 bool EmailInputType::typeMismatch() const
 197 {
 198     return typeMismatchFor(element().value());
 199 }
 200
 201 String EmailInputType::typeMismatchText() const
 202 {
 203     String invalidAddress = findInvalidAddress(element().value());
 204     ASSERT(!invalidAddress.isNull());
 205     if (invalidAddress.isEmpty())
 206         return locale().queryString(WebLocalizedString::ValidationTypeMismatchForEmailEmpty);
 207     String atSign = String("@");
 208     size_t atIndex = invalidAddress.find('@');
 209     if (atIndex == kNotFound)
 210         return locale().queryString(WebLocalizedString::ValidationTypeMismatchForEmailNoAtSign, atSign, invalidAddress);
 211     // We check validity against an ASCII value because of difficulty to check
 212     // invalid characters. However we should show Unicode value.
 213     String unicodeAddress = convertEmailAddressToUnicode(invalidAddress);
 214     String localPart = invalidAddress.left(atIndex);
 215     String domain = invalidAddress.substring(atIndex + 1);
 216     if (localPart.isEmpty())
 217         return locale().queryString(WebLocalizedString::ValidationTypeMismatchForEmailEmptyLocal, atSign, unicodeAddress);
 218     if (domain.isEmpty())
 219         return locale().queryString(WebLocalizedString::ValidationTypeMismatchForEmailEmptyDomain, atSign, unicodeAddress);
 220     size_t invalidCharIndex = localPart.find(isInvalidLocalPartCharacter);
 221     if (invalidCharIndex != kNotFound) {
 222         unsigned charLength = U_IS_LEAD(localPart[invalidCharIndex]) ? 2 : 1;
 223         return locale().queryString(WebLocalizedString::ValidationTypeMismatchForEmailInvalidLocal, atSign, localPart.substring(invalidCharIndex, charLength));
 224     }
 225     invalidCharIndex = domain.find(isInvalidDomainCharacter);
 226     if (invalidCharIndex != kNotFound) {
 227         unsigned charLength = U_IS_LEAD(domain[invalidCharIndex]) ? 2 : 1;
 228         return locale().queryString(WebLocalizedString::ValidationTypeMismatchForEmailInvalidDomain, atSign, domain.substring(invalidCharIndex, charLength));
 229     }
 230     if (!checkValidDotUsage(domain)) {
 231         size_t atIndexInUnicode = unicodeAddress.find('@');
 232         ASSERT(atIndexInUnicode != kNotFound);
 233         return locale().queryString(WebLocalizedString::ValidationTypeMismatchForEmailInvalidDots, String("."), unicodeAddress.substring(atIndexInUnicode + 1));
 234     }
 235     if (element().multiple())
 236         return locale().queryString(WebLocalizedString::ValidationTypeMismatchForMultipleEmail);
 237     return locale().queryString(WebLocalizedString::ValidationTypeMismatchForEmail);
 238 }
 239
 240 bool EmailInputType::supportsSelectionAPI() const
 241 {
 242     return false;
 243 }
 244
 245 String EmailInputType::sanitizeValue(const String& proposedValue) const
 246 {
 247     String noLineBreakValue = proposedValue.removeCharacters(isHTMLLineBreak);
 248     if (!element().multiple())
 249         return stripLeadingAndTrailingHTMLSpaces(noLineBreakValue);
 250     Vector<String> addresses;
 251     noLineBreakValue.split(',', true, addresses);
 252     StringBuilder strippedValue;
 253     for (size_t i = 0; i < addresses.size(); ++i) {
 254         if (i > 0)
 255             strippedValue.append(',');
 256         strippedValue.append(stripLeadingAndTrailingHTMLSpaces(addresses[i]));
 257     }
 258     return strippedValue.toString();
 259 }
 260
 261 String EmailInputType::convertFromVisibleValue(const String& visibleValue) const
 262 {
 263     String sanitizedValue = sanitizeValue(visibleValue);
 264     if (!element().multiple())
 265         return convertEmailAddressToASCII(sanitizedValue);
 266     Vector<String> addresses;
 267     sanitizedValue.split(',', true, addresses);
 268     StringBuilder builder;
 269     builder.reserveCapacity(sanitizedValue.length());
 270     for (size_t i = 0; i < addresses.size(); ++i) {
 271         if (i > 0)
 272             builder.append(',');
 273         builder.append(convertEmailAddressToASCII(addresses[i]));
 274     }
 275     return builder.toString();
 276 }
 277
 278 String EmailInputType::visibleValue() const
 279 {
 280     String value = element().value();
 281     if (!element().multiple())
 282         return convertEmailAddressToUnicode(value);
 283
 284     Vector<String> addresses;
 285     value.split(',', true, addresses);
 286     StringBuilder builder;
 287     builder.reserveCapacity(value.length());
 288     for (size_t i = 0; i < addresses.size(); ++i) {
 289         if (i > 0)
 290             builder.append(',');
 291         builder.append(convertEmailAddressToUnicode(addresses[i]));
 292     }
 293     return builder.toString();
 294 }
 295
 296 } // namespace blink