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gecko-dev/dom/html/HTMLSelectElement.h

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/* -*- 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_dom_HTMLSelectElement_h
#define mozilla_dom_HTMLSelectElement_h
#include "mozilla/Attributes.h"
#include "nsGenericHTMLElement.h"
#include "nsIDOMHTMLSelectElement.h"
#include "nsIConstraintValidation.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/HTMLOptionsCollection.h"
#include "mozilla/ErrorResult.h"
#include "nsCheapSets.h"
#include "nsCOMPtr.h"
#include "nsError.h"
#include "mozilla/dom/HTMLFormElement.h"
#include "nsContentUtils.h"
class nsContentList;
class nsIDOMHTMLOptionElement;
class nsIHTMLCollection;
class nsISelectControlFrame;
class nsPresState;
namespace mozilla {
class EventChainPostVisitor;
class EventChainPreVisitor;
namespace dom {
class HTMLFormSubmission;
class HTMLSelectElement;
#define NS_SELECT_STATE_IID \
{ /* 4db54c7c-d159-455f-9d8e-f60ee466dbf3 */ \
0x4db54c7c, \
0xd159, \
0x455f, \
{0x9d, 0x8e, 0xf6, 0x0e, 0xe4, 0x66, 0xdb, 0xf3} \
}
/**
* The restore state used by select
*/
class SelectState : public nsISupports
{
public:
SelectState()
{
}
NS_DECLARE_STATIC_IID_ACCESSOR(NS_SELECT_STATE_IID)
NS_DECL_ISUPPORTS
void PutOption(int32_t aIndex, const nsAString& aValue)
{
// If the option is empty, store the index. If not, store the value.
if (aValue.IsEmpty()) {
mIndices.Put(aIndex);
} else {
mValues.Put(aValue);
}
}
bool ContainsOption(int32_t aIndex, const nsAString& aValue)
{
return mValues.Contains(aValue) || mIndices.Contains(aIndex);
}
private:
virtual ~SelectState()
{
}
nsCheapSet<nsStringHashKey> mValues;
nsCheapSet<nsUint32HashKey> mIndices;
};
NS_DEFINE_STATIC_IID_ACCESSOR(SelectState, NS_SELECT_STATE_IID)
class MOZ_STACK_CLASS SafeOptionListMutation
{
public:
/**
* @param aSelect The select element which option list is being mutated.
* Can be null.
* @param aParent The content object which is being mutated.
* @param aKid If not null, a new child element is being inserted to
* aParent. Otherwise a child element will be removed.
* @param aIndex The index of the content object in the parent.
*/
SafeOptionListMutation(nsIContent* aSelect, nsIContent* aParent,
nsIContent* aKid, uint32_t aIndex, bool aNotify);
~SafeOptionListMutation();
void MutationFailed() { mNeedsRebuild = true; }
private:
static void* operator new(size_t) CPP_THROW_NEW { return 0; }
static void operator delete(void*, size_t) {}
/** The select element which option list is being mutated. */
RefPtr<HTMLSelectElement> mSelect;
/** true if the current mutation is the first one in the stack. */
bool mTopLevelMutation;
/** true if it is known that the option list must be recreated. */
bool mNeedsRebuild;
/** Option list must be recreated if more than one mutation is detected. */
nsMutationGuard mGuard;
};
/**
* Implementation of &lt;select&gt;
*/
class HTMLSelectElement final : public nsGenericHTMLFormElementWithState,
public nsIDOMHTMLSelectElement,
public nsIConstraintValidation
{
public:
/**
* IS_SELECTED whether to set the option(s) to true or false
*
* CLEAR_ALL whether to clear all other options (for example, if you
* are normal-clicking on the current option)
*
* SET_DISABLED whether it is permissible to set disabled options
* (for JavaScript)
*
* NOTIFY whether to notify frames and such
*/
enum OptionType {
IS_SELECTED = 1 << 0,
CLEAR_ALL = 1 << 1,
SET_DISABLED = 1 << 2,
NOTIFY = 1 << 3
};
using nsIConstraintValidation::GetValidationMessage;
explicit HTMLSelectElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo,
FromParser aFromParser = NOT_FROM_PARSER);
NS_IMPL_FROMCONTENT_HTML_WITH_TAG(HTMLSelectElement, select)
// nsISupports
NS_DECL_ISUPPORTS_INHERITED
virtual int32_t TabIndexDefault() override;
// Element
virtual bool IsInteractiveHTMLContent(bool aIgnoreTabindex) const override
{
return true;
}
// nsIDOMHTMLSelectElement
NS_DECL_NSIDOMHTMLSELECTELEMENT
// WebIdl HTMLSelectElement
bool Autofocus() const
{
return GetBoolAttr(nsGkAtoms::autofocus);
}
void SetAutofocus(bool aVal, ErrorResult& aRv)
{
SetHTMLBoolAttr(nsGkAtoms::autofocus, aVal, aRv);
}
void GetAutocomplete(DOMString& aValue);
void SetAutocomplete(const nsAString& aValue, ErrorResult& aRv)
{
SetHTMLAttr(nsGkAtoms::autocomplete, aValue, aRv);
}
bool Disabled() const
{
return GetBoolAttr(nsGkAtoms::disabled);
}
void SetDisabled(bool aVal, ErrorResult& aRv)
{
SetHTMLBoolAttr(nsGkAtoms::disabled, aVal, aRv);
}
HTMLFormElement* GetForm() const
{
return nsGenericHTMLFormElementWithState::GetForm();
}
bool Multiple() const
{
return GetBoolAttr(nsGkAtoms::multiple);
}
void SetMultiple(bool aVal, ErrorResult& aRv)
{
SetHTMLBoolAttr(nsGkAtoms::multiple, aVal, aRv);
}
// Uses XPCOM GetName.
void SetName(const nsAString& aName, ErrorResult& aRv)
{
SetHTMLAttr(nsGkAtoms::name, aName, aRv);
}
bool Required() const
{
return GetBoolAttr(nsGkAtoms::required);
}
void SetRequired(bool aVal, ErrorResult& aRv)
{
SetHTMLBoolAttr(nsGkAtoms::required, aVal, aRv);
}
uint32_t Size() const
{
return GetUnsignedIntAttr(nsGkAtoms::size, 0);
}
void SetSize(uint32_t aSize, ErrorResult& aRv)
{
SetUnsignedIntAttr(nsGkAtoms::size, aSize, 0, aRv);
}
// Uses XPCOM GetType.
HTMLOptionsCollection* Options() const
{
return mOptions;
}
uint32_t Length() const
{
return mOptions->Length();
}
void SetLength(uint32_t aLength, ErrorResult& aRv);
Element* IndexedGetter(uint32_t aIdx, bool& aFound) const
{
return mOptions->IndexedGetter(aIdx, aFound);
}
HTMLOptionElement* Item(uint32_t aIdx) const
{
return mOptions->ItemAsOption(aIdx);
}
HTMLOptionElement* NamedItem(const nsAString& aName) const
{
return mOptions->GetNamedItem(aName);
}
void Add(const HTMLOptionElementOrHTMLOptGroupElement& aElement,
const Nullable<HTMLElementOrLong>& aBefore,
ErrorResult& aRv);
// Uses XPCOM Remove.
void IndexedSetter(uint32_t aIndex, HTMLOptionElement* aOption,
ErrorResult& aRv)
{
mOptions->IndexedSetter(aIndex, aOption, aRv);
}
static bool MatchSelectedOptions(nsIContent* aContent, int32_t, nsIAtom*,
void*);
nsIHTMLCollection* SelectedOptions();
int32_t SelectedIndex() const
{
return mSelectedIndex;
}
void SetSelectedIndex(int32_t aIdx, ErrorResult& aRv)
{
aRv = SetSelectedIndexInternal(aIdx, true);
}
void GetValue(DOMString& aValue);
// Uses XPCOM SetValue.
// nsIConstraintValidation::WillValidate is fine.
// nsIConstraintValidation::Validity() is fine.
// nsIConstraintValidation::GetValidationMessage() is fine.
// nsIConstraintValidation::CheckValidity() is fine.
using nsIConstraintValidation::CheckValidity;
using nsIConstraintValidation::ReportValidity;
// nsIConstraintValidation::SetCustomValidity() is fine.
using nsINode::Remove;
// nsINode
virtual JSObject* WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
// nsIContent
virtual nsresult PreHandleEvent(EventChainPreVisitor& aVisitor) override;
virtual nsresult PostHandleEvent(
EventChainPostVisitor& aVisitor) override;
virtual bool IsHTMLFocusable(bool aWithMouse, bool* aIsFocusable, int32_t* aTabIndex) override;
virtual nsresult InsertChildAt(nsIContent* aKid, uint32_t aIndex,
bool aNotify) override;
virtual void RemoveChildAt(uint32_t aIndex, bool aNotify) override;
// Overriden nsIFormControl methods
NS_IMETHOD_(uint32_t) GetType() const override { return NS_FORM_SELECT; }
NS_IMETHOD Reset() override;
NS_IMETHOD SubmitNamesValues(HTMLFormSubmission* aFormSubmission) override;
NS_IMETHOD SaveState() override;
virtual bool RestoreState(nsPresState* aState) override;
virtual bool IsDisabledForEvents(EventMessage aMessage) override;
virtual void FieldSetDisabledChanged(bool aNotify) override;
EventStates IntrinsicState() const override;
/**
* To be called when stuff is added under a child of the select--but *before*
* they are actually added.
*
* @param aOptions the content that was added (usually just an option, but
* could be an optgroup node with many child options)
* @param aParent the parent the options were added to (could be an optgroup)
* @param aContentIndex the index where the options are being added within the
* parent (if the parent is an optgroup, the index within the optgroup)
*/
NS_IMETHOD WillAddOptions(nsIContent* aOptions,
nsIContent* aParent,
int32_t aContentIndex,
bool aNotify);
/**
* To be called when stuff is removed under a child of the select--but
* *before* they are actually removed.
*
* @param aParent the parent the option(s) are being removed from
* @param aContentIndex the index of the option(s) within the parent (if the
* parent is an optgroup, the index within the optgroup)
*/
NS_IMETHOD WillRemoveOptions(nsIContent* aParent,
int32_t aContentIndex,
bool aNotify);
/**
* Checks whether an option is disabled (even if it's part of an optgroup)
*
* @param aIndex the index of the option to check
* @return whether the option is disabled
*/
NS_IMETHOD IsOptionDisabled(int32_t aIndex,
bool* aIsDisabled);
bool IsOptionDisabled(HTMLOptionElement* aOption);
/**
* Sets multiple options (or just sets startIndex if select is single)
* and handles notifications and cleanup and everything under the sun.
* When this method exits, the select will be in a consistent state. i.e.
* if you set the last option to false, it will select an option anyway.
*
* @param aStartIndex the first index to set
* @param aEndIndex the last index to set (set same as first index for one
* option)
* @param aOptionsMask determines whether to set, clear all or disable
* options and whether frames are to be notified of such.
* @return whether any options were actually changed
*/
bool SetOptionsSelectedByIndex(int32_t aStartIndex,
int32_t aEndIndex,
uint32_t aOptionsMask);
/**
* Finds the index of a given option element
*
* @param aOption the option to get the index of
* @param aStartIndex the index to start looking at
* @param aForward TRUE to look forward, FALSE to look backward
* @return the option index
*/
NS_IMETHOD GetOptionIndex(nsIDOMHTMLOptionElement* aOption,
int32_t aStartIndex,
bool aForward,
int32_t* aIndex);
/**
* Called when an attribute is about to be changed
*/
virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers) override;
virtual void UnbindFromTree(bool aDeep, bool aNullParent) override;
virtual nsresult BeforeSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
nsAttrValueOrString* aValue,
bool aNotify) override;
virtual nsresult AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
const nsAttrValue* aValue, bool aNotify) override;
virtual nsresult UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
bool aNotify) override;
virtual void DoneAddingChildren(bool aHaveNotified) override;
virtual bool IsDoneAddingChildren() override {
return mIsDoneAddingChildren;
}
virtual bool ParseAttribute(int32_t aNamespaceID,
nsIAtom* aAttribute,
const nsAString& aValue,
nsAttrValue& aResult) override;
virtual nsMapRuleToAttributesFunc GetAttributeMappingFunction() const override;
virtual nsChangeHint GetAttributeChangeHint(const nsIAtom* aAttribute,
int32_t aModType) const override;
NS_IMETHOD_(bool) IsAttributeMapped(const nsIAtom* aAttribute) const override;
virtual nsresult Clone(mozilla::dom::NodeInfo* aNodeInfo, nsINode** aResult) const override;
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLSelectElement,
nsGenericHTMLFormElementWithState)
HTMLOptionsCollection* GetOptions()
{
return mOptions;
}
// nsIConstraintValidation
nsresult GetValidationMessage(nsAString& aValidationMessage,
ValidityStateType aType) override;
void UpdateValueMissingValidityState();
/**
* Insert aElement before the node given by aBefore
*/
void Add(nsGenericHTMLElement& aElement, nsGenericHTMLElement* aBefore,
ErrorResult& aError);
void Add(nsGenericHTMLElement& aElement, int32_t aIndex, ErrorResult& aError)
{
// If item index is out of range, insert to last.
// (since beforeElement becomes null, it is inserted to last)
nsIContent* beforeContent = mOptions->GetElementAt(aIndex);
return Add(aElement, nsGenericHTMLElement::FromContentOrNull(beforeContent),
aError);
}
/**
* Is this a combobox?
*/
bool IsCombobox() const
{
return !Multiple() && Size() <= 1;
}
bool OpenInParentProcess();
void SetOpenInParentProcess(bool aVal);
protected:
virtual ~HTMLSelectElement();
friend class SafeOptionListMutation;
// Helper Methods
/**
* Check whether the option specified by the index is selected
* @param aIndex the index
* @return whether the option at the index is selected
*/
bool IsOptionSelectedByIndex(int32_t aIndex);
/**
* Starting with (and including) aStartIndex, find the first selected index
* and set mSelectedIndex to it.
* @param aStartIndex the index to start with
*/
void FindSelectedIndex(int32_t aStartIndex, bool aNotify);
/**
* Select some option if possible (generally the first non-disabled option).
* @return true if something was selected, false otherwise
*/
bool SelectSomething(bool aNotify);
/**
* Call SelectSomething(), but only if nothing is selected
* @see SelectSomething()
* @return true if something was selected, false otherwise
*/
bool CheckSelectSomething(bool aNotify);
/**
* Called to trigger notifications of frames and fixing selected index
*
* @param aSelectFrame the frame for this content (could be null)
* @param aIndex the index that was selected or deselected
* @param aSelected whether the index was selected or deselected
* @param aChangeOptionState if false, don't do anything to the
* HTMLOptionElement at aIndex. If true, change
* its selected state to aSelected.
* @param aNotify whether to notify the style system and such
*/
void OnOptionSelected(nsISelectControlFrame* aSelectFrame,
int32_t aIndex,
bool aSelected,
bool aChangeOptionState,
bool aNotify);
/**
* Restore state to a particular state string (representing the options)
* @param aNewSelected the state string to restore to
*/
void RestoreStateTo(SelectState* aNewSelected);
// Adding options
/**
* Insert option(s) into the options[] array and perform notifications
* @param aOptions the option or optgroup being added
* @param aListIndex the index to start adding options into the list at
* @param aDepth the depth of aOptions (1=direct child of select ...)
*/
void InsertOptionsIntoList(nsIContent* aOptions,
int32_t aListIndex,
int32_t aDepth,
bool aNotify);
/**
* Remove option(s) from the options[] array
* @param aOptions the option or optgroup being added
* @param aListIndex the index to start removing options from the list at
* @param aDepth the depth of aOptions (1=direct child of select ...)
*/
nsresult RemoveOptionsFromList(nsIContent* aOptions,
int32_t aListIndex,
int32_t aDepth,
bool aNotify);
// nsIConstraintValidation
void UpdateBarredFromConstraintValidation();
bool IsValueMissing();
/**
* Get the index of the first option at, under or following the content in
* the select, or length of options[] if none are found
* @param aOptions the content
* @return the index of the first option
*/
int32_t GetOptionIndexAt(nsIContent* aOptions);
/**
* Get the next option following the content in question (not at or under)
* (this could include siblings of the current content or siblings of the
* parent or children of siblings of the parent).
* @param aOptions the content
* @return the index of the next option after the content
*/
int32_t GetOptionIndexAfter(nsIContent* aOptions);
/**
* Get the first option index at or under the content in question.
* @param aOptions the content
* @return the index of the first option at or under the content
*/
int32_t GetFirstOptionIndex(nsIContent* aOptions);
/**
* Get the first option index under the content in question, within the
* range specified.
* @param aOptions the content
* @param aStartIndex the first child to look at
* @param aEndIndex the child *after* the last child to look at
* @return the index of the first option at or under the content
*/
int32_t GetFirstChildOptionIndex(nsIContent* aOptions,
int32_t aStartIndex,
int32_t aEndIndex);
/**
* Get the frame as an nsISelectControlFrame (MAY RETURN nullptr)
* @return the select frame, or null
*/
nsISelectControlFrame* GetSelectFrame();
/**
* Helper method for dispatching ContentReset notifications to list
* and combo box frames.
*/
void DispatchContentReset();
/**
* Rebuilds the options array from scratch as a fallback in error cases.
*/
void RebuildOptionsArray(bool aNotify);
#ifdef DEBUG
void VerifyOptionsArray();
#endif
nsresult SetSelectedIndexInternal(int32_t aIndex, bool aNotify);
void SetSelectionChanged(bool aValue, bool aNotify);
/**
* Marks the selectedOptions list as dirty, so that it'll populate itself
* again.
*/
void UpdateSelectedOptions();
/**
* Return whether an element should have a validity UI.
* (with :-moz-ui-invalid and :-moz-ui-valid pseudo-classes).
*
* @return Whether the element should have a validity UI.
*/
bool ShouldShowValidityUI() const {
/**
* Always show the validity UI if the form has already tried to be submitted
* but was invalid.
*
* Otherwise, show the validity UI if the selection has been changed.
*/
if (mForm && mForm->HasEverTriedInvalidSubmit()) {
return true;
}
return mSelectionHasChanged;
}
/** The options[] array */
RefPtr<HTMLOptionsCollection> mOptions;
nsContentUtils::AutocompleteAttrState mAutocompleteAttrState;
/** false if the parser is in the middle of adding children. */
bool mIsDoneAddingChildren;
/** true if our disabled state has changed from the default **/
bool mDisabledChanged;
/** true if child nodes are being added or removed.
* Used by SafeOptionListMutation.
*/
bool mMutating;
/**
* True if DoneAddingChildren will get called but shouldn't restore state.
*/
bool mInhibitStateRestoration;
/**
* True if the selection has changed since the element's creation.
*/
bool mSelectionHasChanged;
/**
* True if the default selected option has been set.
*/
bool mDefaultSelectionSet;
/**
* True if :-moz-ui-invalid can be shown.
*/
bool mCanShowInvalidUI;
/**
* True if :-moz-ui-valid can be shown.
*/
bool mCanShowValidUI;
/** The number of non-options as children of the select */
uint32_t mNonOptionChildren;
/** The number of optgroups anywhere under the select */
uint32_t mOptGroupCount;
/**
* The current selected index for selectedIndex (will be the first selected
* index if multiple are selected)
*/
int32_t mSelectedIndex;
/**
* The temporary restore state in case we try to restore before parser is
* done adding options
*/
nsCOMPtr<SelectState> mRestoreState;
/**
* The live list of selected options.
*/
RefPtr<nsContentList> mSelectedOptions;
private:
static void MapAttributesIntoRule(const nsMappedAttributes* aAttributes,
nsRuleData* aData);
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_HTMLSelectElement_h
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