Implement minlength for <input> and <textarea>.

Source/core/html/HTMLInputElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 43 matching lines @@
 
     virtual bool shouldAutocomplete() const OVERRIDE FINAL;
 
     // For ValidityState
     virtual bool hasBadInput() const OVERRIDE FINAL;
     virtual bool patternMismatch() const OVERRIDE FINAL;
     virtual bool rangeUnderflow() const OVERRIDE FINAL;
     virtual bool rangeOverflow() const OVERRIDE FINAL;
     virtual bool stepMismatch() const OVERRIDE FINAL;
     virtual bool tooLong() const OVERRIDE FINAL;
+    virtual bool tooShort() const OVERRIDE FINAL;
     virtual bool typeMismatch() const OVERRIDE FINAL;
     virtual bool valueMissing() const OVERRIDE FINAL;
     virtual String validationMessage() const OVERRIDE FINAL;
 
     // Returns the minimum value for type=date, number, or range.  Don't call this for other types.
     double minimum() const;
     // Returns the maximum value for type=date, number, or range.  Don't call this for other types.
     // This always returns a value which is >= minimum().
     double maximum() const;
     // Sets the "allowed value step" defined in the HTML spec to the specified double pointer.
@@ skipping 111 matching lines @@
     Vector<String> acceptMIMETypes();
     Vector<String> acceptFileExtensions();
     const AtomicString& alt() const;
 
     void setSize(unsigned);
     void setSize(unsigned, ExceptionState&);
 
     KURL src() const;
 
     int maxLength() const;
+    int minLength() const;
     void setMaxLength(int, ExceptionState&);
+    void setMinLength(int, ExceptionState&);
 
     bool multiple() const;
 
     FileList* files();
     void setFiles(PassRefPtrWillBeRawPtr<FileList>);
 
     // Returns true if the given DragData has more than one dropped files.
     bool receiveDroppedFiles(const DragData*);
 
     String droppedFileSystemId();
@@ skipping 126 matching lines @@
     virtual void postDispatchEventHandler(Event*, void* dataFromPreDispatch) OVERRIDE FINAL;
 
     virtual bool isURLAttribute(const Attribute&) const OVERRIDE FINAL;
     virtual bool hasLegalLinkAttribute(const QualifiedName&) const OVERRIDE FINAL;
     virtual const QualifiedName& subResourceAttributeName() const OVERRIDE FINAL;
     virtual bool isInRange() const OVERRIDE FINAL;
     virtual bool isOutOfRange() const OVERRIDE FINAL;
 
     bool isTextType() const;
     bool tooLong(const String&, NeedsToCheckDirtyFlag) const;
+    bool tooShort(const String&, NeedsToCheckDirtyFlag) const;
 
     virtual bool supportsPlaceholder() const OVERRIDE FINAL;
     virtual void updatePlaceholderText() OVERRIDE FINAL;
     virtual bool isEmptyValue() const OVERRIDE FINAL { return innerEditorValue().isEmpty(); }
     virtual bool isEmptySuggestedValue() const OVERRIDE FINAL { return suggestedValue().isEmpty(); }
     virtual void handleFocusEvent(Element* oldFocusedElement, FocusType) OVERRIDE FINAL;
     virtual void handleBlurEvent() OVERRIDE FINAL;
 
     virtual bool isOptionalFormControl() const OVERRIDE FINAL { return !isRequiredFormControl(); }
     virtual bool isRequiredFormControl() const OVERRIDE FINAL;
     virtual bool recalcWillValidate() const OVERRIDE FINAL;
     virtual void requiredAttributeChanged() OVERRIDE FINAL;
 
     void updateType();
 
     virtual void subtreeHasChanged() OVERRIDE FINAL;
 
     void setListAttributeTargetObserver(PassOwnPtrWillBeRawPtr<ListAttributeTargetObserver>);
     void resetListAttributeTargetObserver();
     void parseMaxLengthAttribute(const AtomicString&);
+    void parseMinLengthAttribute(const AtomicString&);
     void updateValueIfNeeded();
 
     // Returns null if this isn't associated with any radio button group.
     RadioButtonGroupScope* radioButtonGroupScope() const;
     void addToRadioButtonGroup();
     void removeFromRadioButtonGroup();
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
     virtual PassRefPtr<RenderStyle> customStyleForRenderer() OVERRIDE;
 #endif
 
     virtual bool shouldDispatchFormControlChangeEvent(String&, String&) OVERRIDE;
 
     AtomicString m_name;
     String m_valueIfDirty;
     String m_suggestedValue;
     int m_size;
     int m_maxLength;
+    int m_minLength;
     short m_maxResults;
     bool m_isChecked : 1;
     bool m_reflectsCheckedAttribute : 1;
     bool m_isIndeterminate : 1;
     bool m_isActivatedSubmit : 1;
     unsigned m_autocomplete : 2; // AutoCompleteSetting
     bool m_hasNonEmptyList : 1;
     bool m_stateRestored : 1;
     bool m_parsingInProgress : 1;
     bool m_valueAttributeWasUpdatedAfterParsing : 1;
     bool m_canReceiveDroppedFiles : 1;
     bool m_hasTouchEventHandler : 1;
     bool m_shouldRevealPassword : 1;
     bool m_needsToUpdateViewValue : 1;
     RefPtrWillBeMember<InputType> m_inputType;
     RefPtrWillBeMember<InputTypeView> m_inputTypeView;
     // The ImageLoader must be owned by this element because the loader code assumes
     // that it lives as long as its owning element lives. If we move the loader into
     // the ImageInput object we may delete the loader while this element lives on.
     OwnPtrWillBeMember<HTMLImageLoader> m_imageLoader;
     OwnPtrWillBeMember<ListAttributeTargetObserver> m_listAttributeTargetObserver;
 };
 
 } //namespace
 #endif