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/*
* 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, 2008, 2009, 2010 Apple Inc. All rights reserved.
* Copyright (C) 2009, 2010, 2011 Google Inc. 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
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef HTMLTextFormControlElement_h
#define HTMLTextFormControlElement_h
#include "core/html/HTMLFormControlElementWithState.h"
namespace blink {
class ExceptionState;
class Position;
class Range;
class VisiblePosition;
enum TextFieldSelectionDirection { SelectionHasNoDirection, SelectionHasForwardDirection, SelectionHasBackwardDirection };
enum TextFieldEventBehavior { DispatchNoEvent, DispatchChangeEvent, DispatchInputAndChangeEvent };
enum NeedToDispatchSelectEvent { DispatchSelectEvent, NotDispatchSelectEvent };
class HTMLTextFormControlElement : public HTMLFormControlElementWithState {
public:
// Common flag for HTMLInputElement::tooLong(), HTMLTextAreaElement::tooLong(),
// HTMLInputElement::tooShort() and HTMLTextAreaElement::tooShort().
enum NeedsToCheckDirtyFlag {CheckDirtyFlag, IgnoreDirtyFlag};
// Option of setSelectionRange.
enum SelectionOption {
ChangeSelection,
ChangeSelectionAndFocus,
ChangeSelectionIfFocused,
NotChangeSelection
};
virtual ~HTMLTextFormControlElement();
void forwardEvent(Event*);
virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
// The derived class should return true if placeholder processing is needed.
virtual bool supportsPlaceholder() const = 0;
String strippedPlaceholder() const;
bool placeholderShouldBeVisible() const;
HTMLElement* placeholderElement() const;
void updatePlaceholderVisibility(bool);
VisiblePosition visiblePositionForIndex(int) const;
int indexForVisiblePosition(const VisiblePosition&) const;
int selectionStart() const;
int selectionEnd() const;
const AtomicString& selectionDirection() const;
void setSelectionStart(int);
void setSelectionEnd(int);
void setSelectionDirection(const String&);
void select(NeedToDispatchSelectEvent = DispatchSelectEvent);
virtual void setRangeText(const String& replacement, ExceptionState&);
virtual void setRangeText(const String& replacement, unsigned start, unsigned end, const String& selectionMode, ExceptionState&);
void setSelectionRange(int start, int end, const String& direction);
void setSelectionRange(int start, int end, TextFieldSelectionDirection = SelectionHasNoDirection, NeedToDispatchSelectEvent = DispatchSelectEvent, SelectionOption = ChangeSelection);
PassRefPtrWillBeRawPtr<Range> selection() const;
virtual void dispatchFormControlChangeEvent() override final;
virtual String value() const = 0;
HTMLElement* innerEditorElement() const;
void selectionChanged(bool userTriggered);
bool lastChangeWasUserEdit() const;
virtual void setInnerEditorValue(const String&);
String innerEditorValue() const;
String directionForFormData() const;
void setTextAsOfLastFormControlChangeEvent(const String& text) { m_textAsOfLastFormControlChangeEvent = text; }
// These functions don't cause synchronous layout and SpellChecker uses
// them to improve performance.
// Passed |Position| must point inside of a text form control.
static Position startOfWord(const Position&);
static Position endOfWord(const Position&);
static Position startOfSentence(const Position&);
static Position endOfSentence(const Position&);
protected:
HTMLTextFormControlElement(const QualifiedName&, Document&, HTMLFormElement*);
bool isPlaceholderEmpty() const;
virtual void updatePlaceholderText() = 0;
virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
void cacheSelection(int start, int end, TextFieldSelectionDirection direction)
{
ASSERT(start >= 0);
m_cachedSelectionStart = start;
m_cachedSelectionEnd = end;
m_cachedSelectionDirection = direction;
}
void restoreCachedSelection();
virtual void defaultEventHandler(Event*) override;
virtual void subtreeHasChanged() = 0;
void setLastChangeWasNotUserEdit() { m_lastChangeWasUserEdit = false; }
String valueWithHardLineBreaks() const;
virtual bool shouldDispatchFormControlChangeEvent(String&, String&);
private:
int computeSelectionStart() const;
int computeSelectionEnd() const;
TextFieldSelectionDirection computeSelectionDirection() const;
virtual void dispatchFocusEvent(Element* oldFocusedElement, FocusType) override final;
virtual void dispatchBlurEvent(Element* newFocusedElement) override final;
void scheduleSelectEvent();
// Returns true if user-editable value is empty. Used to check placeholder visibility.
virtual bool isEmptyValue() const = 0;
// Returns true if suggested value is empty. Used to check placeholder visibility.
virtual bool isEmptySuggestedValue() const { return true; }
// Called in dispatchFocusEvent(), after placeholder process, before calling parent's dispatchFocusEvent().
virtual void handleFocusEvent(Element* /* oldFocusedNode */, FocusType) { }
// Called in dispatchBlurEvent(), after placeholder process, before calling parent's dispatchBlurEvent().
virtual void handleBlurEvent() { }
String m_textAsOfLastFormControlChangeEvent;
bool m_lastChangeWasUserEdit;
int m_cachedSelectionStart;
int m_cachedSelectionEnd;
TextFieldSelectionDirection m_cachedSelectionDirection;
};
inline bool isHTMLTextFormControlElement(const Element& element)
{
return element.isTextFormControl();
}
DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLTextFormControlElement);
HTMLTextFormControlElement* enclosingTextFormControl(const Position&);
HTMLTextFormControlElement* enclosingTextFormControl(Node*);
} // namespace
#endif
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