TextControlElement.h
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_TextControlElement_h
#define mozilla_TextControlElement_h
#include "mozilla/dom/FromParser.h"
#include "mozilla/dom/NodeInfo.h"
#include "nsGenericHTMLElement.h"
class nsIContent;
class nsISelectionController;
class nsFrameSelection;
class nsTextControlFrame;
namespace mozilla {
class ErrorResult;
class TextControlState;
class TextEditor;
/**
* This abstract class is used for the text control frame to get the editor and
* selection controller objects, and some helper properties.
*/
class TextControlElement : public nsGenericHTMLFormControlElementWithState {
public:
TextControlElement(already_AddRefed<dom::NodeInfo>&& aNodeInfo,
dom::FromParser aFromParser, FormControlType aType)
: nsGenericHTMLFormControlElementWithState(std::move(aNodeInfo),
aFromParser, aType){};
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(
TextControlElement, nsGenericHTMLFormControlElementWithState)
bool IsTextControlElement() const final { return true; }
NS_IMPL_FROMNODE_HELPER(TextControlElement, IsTextControlElement())
/**
* Tell the control that value has been deliberately changed (or not).
*/
virtual void SetValueChanged(bool) = 0;
/**
* Find out whether this is a single line text control. (text or password)
* @return whether this is a single line text control
*/
virtual bool IsSingleLineTextControl() const = 0;
/**
* Find out whether this control is a textarea.
* @return whether this is a textarea text control
*/
virtual bool IsTextArea() const = 0;
/**
* Find out whether this is a password control (input type=password)
* @return whether this is a password ontrol
*/
virtual bool IsPasswordTextControl() const = 0;
/**
* Get the cols attribute (if textarea) or a default
* @return the number of columns to use
*/
virtual int32_t GetCols() = 0;
/**
* Get the column index to wrap at, or -1 if we shouldn't wrap
*/
virtual int32_t GetWrapCols() = 0;
/**
* Get the rows attribute (if textarea) or a default
* @return the number of rows to use
*/
virtual int32_t GetRows() = 0;
/**
* Get the default value of the text control
*/
virtual void GetDefaultValueFromContent(nsAString& aValue) = 0;
/**
* Return true if the value of the control has been changed.
*/
virtual bool ValueChanged() const = 0;
/**
* Returns the used maxlength attribute value.
*/
virtual int32_t UsedMaxLength() const = 0;
/**
* Get the current value of the text editor.
*
* @param aValue the buffer to retrieve the value in
* @param aIgnoreWrap whether to ignore the text wrapping behavior specified
* for the element.
*/
virtual void GetTextEditorValue(nsAString& aValue,
bool aIgnoreWrap) const = 0;
/**
* Get the editor object associated with the text editor.
* The return value is null if the control does not support an editor
* (for example, if it is a checkbox.)
* Note that GetTextEditor() creates editor if it hasn't been created yet.
* If you need editor only when the editor is there, you should use
* GetTextEditorWithoutCreation().
*/
MOZ_CAN_RUN_SCRIPT virtual TextEditor* GetTextEditor() = 0;
virtual TextEditor* GetTextEditorWithoutCreation() = 0;
/**
* Get the selection controller object associated with the text editor.
* The return value is null if the control does not support an editor
* (for example, if it is a checkbox.)
*/
virtual nsISelectionController* GetSelectionController() = 0;
virtual nsFrameSelection* GetConstFrameSelection() = 0;
virtual TextControlState* GetTextControlState() const = 0;
/**
* Binds a frame to the text control. This is performed when a frame
* is created for the content node.
* Be aware, this must be called with script blocker.
*/
virtual nsresult BindToFrame(nsTextControlFrame* aFrame) = 0;
/**
* Unbinds a frame from the text control. This is performed when a frame
* belonging to a content node is destroyed.
*/
MOZ_CAN_RUN_SCRIPT virtual void UnbindFromFrame(
nsTextControlFrame* aFrame) = 0;
/**
* Creates an editor for the text control. This should happen when
* a frame has been created for the text control element, but the created
* editor may outlive the frame itself.
*/
MOZ_CAN_RUN_SCRIPT virtual nsresult CreateEditor() = 0;
/**
* Update preview value for the text control.
*/
virtual void SetPreviewValue(const nsAString& aValue) = 0;
/**
* Get the current preview value for text control.
*/
virtual void GetPreviewValue(nsAString& aValue) = 0;
/**
* Enable preview for text control.
*/
virtual void EnablePreview() = 0;
/**
* Find out whether this control enables preview for form autofoll.
*/
virtual bool IsPreviewEnabled() = 0;
/**
* Initialize the keyboard event listeners.
*/
virtual void InitializeKeyboardEventListeners() = 0;
enum class ValueChangeKind {
Internal,
Script,
UserInteraction,
};
/**
* Callback called whenever the value is changed.
*
* aKnownNewValue can be used to avoid value lookups if present (might be
* null, if the caller doesn't know the specific value that got set).
*/
virtual void OnValueChanged(ValueChangeKind, bool aNewValueEmpty,
const nsAString* aKnownNewValue) = 0;
void OnValueChanged(ValueChangeKind aKind, const nsAString& aNewValue) {
return OnValueChanged(aKind, aNewValue.IsEmpty(), &aNewValue);
}
/**
* Helpers for value manipulation from SetRangeText.
*/
virtual void GetValueFromSetRangeText(nsAString& aValue) = 0;
MOZ_CAN_RUN_SCRIPT virtual nsresult SetValueFromSetRangeText(
const nsAString& aValue) = 0;
static const int32_t DEFAULT_COLS = 20;
static const int32_t DEFAULT_ROWS = 1;
static const int32_t DEFAULT_ROWS_TEXTAREA = 2;
static const int32_t DEFAULT_UNDO_CAP = 1000;
// wrap can be one of these three values.
typedef enum {
eHTMLTextWrap_Off = 1, // "off"
eHTMLTextWrap_Hard = 2, // "hard"
eHTMLTextWrap_Soft = 3 // the default
} nsHTMLTextWrap;
static bool GetWrapPropertyEnum(nsIContent* aContent,
nsHTMLTextWrap& aWrapProp);
/**
* Does the editor have a selection cache?
*
* Note that this function has the side effect of making the editor for input
* elements be initialized eagerly.
*/
virtual bool HasCachedSelection() = 0;
static already_AddRefed<TextControlElement>
GetTextControlElementFromEditingHost(nsIContent* aHost);
protected:
virtual ~TextControlElement() = default;
// The focusability state of this form control. eUnfocusable means that it
// shouldn't be focused at all, eInactiveWindow means it's in an inactive
// window, eActiveWindow means it's in an active window.
enum class FocusTristate { eUnfocusable, eInactiveWindow, eActiveWindow };
// Get our focus state.
FocusTristate FocusState();
};
} // namespace mozilla
#endif // mozilla_TextControlElement_h
