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      1 /*
      2  * This file is part of the WebKit project.
      3  *
      4  * Copyright (C) 2009 Michelangelo De Simone <micdesim (at) 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/BaseTextInputType.h"
     26 
     27 #include "bindings/core/v8/ScriptRegexp.h"
     28 #include "core/HTMLNames.h"
     29 #include "core/html/HTMLInputElement.h"
     30 
     31 namespace blink {
     32 
     33 using namespace HTMLNames;
     34 
     35 int BaseTextInputType::maxLength() const
     36 {
     37     return element().maxLength();
     38 }
     39 
     40 bool BaseTextInputType::tooLong(const String& value, HTMLTextFormControlElement::NeedsToCheckDirtyFlag check) const
     41 {
     42     int max = element().maxLength();
     43     if (max < 0)
     44         return false;
     45     if (check == HTMLTextFormControlElement::CheckDirtyFlag) {
     46         // Return false for the default value or a value set by a script even if
     47         // it is longer than maxLength.
     48         if (!element().hasDirtyValue() || !element().lastChangeWasUserEdit())
     49             return false;
     50     }
     51     return value.length() > static_cast<unsigned>(max);
     52 }
     53 
     54 bool BaseTextInputType::patternMismatch(const String& value) const
     55 {
     56     const AtomicString& rawPattern = element().fastGetAttribute(patternAttr);
     57     // Empty values can't be mismatched
     58     if (rawPattern.isNull() || value.isEmpty() || !ScriptRegexp(rawPattern, TextCaseSensitive).isValid())
     59         return false;
     60     String pattern = "^(?:" + rawPattern + ")$";
     61     int matchLength = 0;
     62     int valueLength = value.length();
     63     int matchOffset = ScriptRegexp(pattern, TextCaseSensitive).match(value, 0, &matchLength);
     64     return matchOffset || matchLength != valueLength;
     65 }
     66 
     67 bool BaseTextInputType::supportsPlaceholder() const
     68 {
     69     return true;
     70 }
     71 
     72 bool BaseTextInputType::supportsSelectionAPI() const
     73 {
     74     return true;
     75 }
     76 
     77 } // namespace blink
     78