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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/. */
#include "mozilla/dom/HTMLFormControlsCollection.h"
#include "mozilla/FlushType.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLFormControlsCollectionBinding.h"
#include "mozilla/dom/HTMLFormElement.h"
#include "nsGenericHTMLElement.h" // nsGenericHTMLFormElement
#include "mozilla/dom/Document.h"
#include "nsIFormControl.h"
#include "RadioNodeList.h"
#include "jsfriendapi.h"
namespace mozilla {
namespace dom {
/* static */
bool HTMLFormControlsCollection::ShouldBeInElements(
nsIFormControl* aFormControl) {
// For backwards compatibility (with 4.x and IE) we must not add
// <input type=image> elements to the list of form controls in a
// form.
switch (aFormControl->ControlType()) {
case NS_FORM_BUTTON_BUTTON:
case NS_FORM_BUTTON_RESET:
case NS_FORM_BUTTON_SUBMIT:
case NS_FORM_INPUT_BUTTON:
case NS_FORM_INPUT_CHECKBOX:
case NS_FORM_INPUT_COLOR:
case NS_FORM_INPUT_EMAIL:
case NS_FORM_INPUT_FILE:
case NS_FORM_INPUT_HIDDEN:
case NS_FORM_INPUT_RESET:
case NS_FORM_INPUT_PASSWORD:
case NS_FORM_INPUT_RADIO:
case NS_FORM_INPUT_SEARCH:
case NS_FORM_INPUT_SUBMIT:
case NS_FORM_INPUT_TEXT:
case NS_FORM_INPUT_TEL:
case NS_FORM_INPUT_URL:
case NS_FORM_INPUT_NUMBER:
case NS_FORM_INPUT_RANGE:
case NS_FORM_INPUT_DATE:
case NS_FORM_INPUT_TIME:
case NS_FORM_INPUT_MONTH:
case NS_FORM_INPUT_WEEK:
case NS_FORM_INPUT_DATETIME_LOCAL:
case NS_FORM_SELECT:
case NS_FORM_TEXTAREA:
case NS_FORM_FIELDSET:
case NS_FORM_OBJECT:
case NS_FORM_OUTPUT:
return true;
}
// These form control types are not supposed to end up in the
// form.elements array
//
// NS_FORM_INPUT_IMAGE
//
// XXXbz maybe we should just check for that type here instead of the big
// switch?
return false;
}
HTMLFormControlsCollection::HTMLFormControlsCollection(HTMLFormElement* aForm)
: mForm(aForm)
// Initialize the elements list to have an initial capacity
// of 8 to reduce allocations on small forms.
,
mElements(8),
mNameLookupTable(HTMLFormElement::FORM_CONTROL_LIST_HASHTABLE_LENGTH) {}
HTMLFormControlsCollection::~HTMLFormControlsCollection() {
mForm = nullptr;
Clear();
}
void HTMLFormControlsCollection::DropFormReference() {
mForm = nullptr;
Clear();
}
void HTMLFormControlsCollection::Clear() {
// Null out childrens' pointer to me. No refcounting here
for (int32_t i = mElements.Length() - 1; i >= 0; i--) {
mElements[i]->ClearForm(false, false);
}
mElements.Clear();
for (int32_t i = mNotInElements.Length() - 1; i >= 0; i--) {
mNotInElements[i]->ClearForm(false, false);
}
mNotInElements.Clear();
mNameLookupTable.Clear();
}
void HTMLFormControlsCollection::FlushPendingNotifications() {
if (mForm) {
Document* doc = mForm->GetUncomposedDoc();
if (doc) {
doc->FlushPendingNotifications(FlushType::Content);
}
}
}
NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLFormControlsCollection)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(HTMLFormControlsCollection)
// Note: We intentionally don't set tmp->mForm to nullptr here, since doing
// so may result in crashes because of inconsistent null-checking after the
// object gets unlinked.
tmp->Clear();
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(HTMLFormControlsCollection)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNameLookupTable)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(HTMLFormControlsCollection)
NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_TRACE_END
// XPConnect interface list for HTMLFormControlsCollection
NS_INTERFACE_TABLE_HEAD(HTMLFormControlsCollection)
NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
NS_INTERFACE_TABLE(HTMLFormControlsCollection, nsIHTMLCollection)
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(HTMLFormControlsCollection)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(HTMLFormControlsCollection)
NS_IMPL_CYCLE_COLLECTING_RELEASE(HTMLFormControlsCollection)
// nsIHTMLCollection interface
uint32_t HTMLFormControlsCollection::Length() {
FlushPendingNotifications();
return mElements.Length();
}
nsISupports* HTMLFormControlsCollection::NamedItemInternal(
const nsAString& aName, bool aFlushContent) {
if (aFlushContent) {
FlushPendingNotifications();
}
return mNameLookupTable.GetWeak(aName);
}
nsresult HTMLFormControlsCollection::AddElementToTable(
nsGenericHTMLFormElement* aChild, const nsAString& aName) {
if (!ShouldBeInElements(aChild)) {
return NS_OK;
}
return mForm->AddElementToTableInternal(mNameLookupTable, aChild, aName);
}
nsresult HTMLFormControlsCollection::IndexOfControl(nsIFormControl* aControl,
int32_t* aIndex) {
// Note -- not a DOM method; callers should handle flushing themselves
NS_ENSURE_ARG_POINTER(aIndex);
*aIndex = mElements.IndexOf(aControl);
return NS_OK;
}
nsresult HTMLFormControlsCollection::RemoveElementFromTable(
nsGenericHTMLFormElement* aChild, const nsAString& aName) {
if (!ShouldBeInElements(aChild)) {
return NS_OK;
}
return mForm->RemoveElementFromTableInternal(mNameLookupTable, aChild, aName);
}
nsresult HTMLFormControlsCollection::GetSortedControls(
nsTArray<RefPtr<nsGenericHTMLFormElement>>& aControls) const {
#ifdef DEBUG
HTMLFormElement::AssertDocumentOrder(mElements, mForm);
HTMLFormElement::AssertDocumentOrder(mNotInElements, mForm);
#endif
aControls.Clear();
// Merge the elements list and the not in elements list. Both lists are
// already sorted.
uint32_t elementsLen = mElements.Length();
uint32_t notInElementsLen = mNotInElements.Length();
aControls.SetCapacity(elementsLen + notInElementsLen);
uint32_t elementsIdx = 0;
uint32_t notInElementsIdx = 0;
while (elementsIdx < elementsLen || notInElementsIdx < notInElementsLen) {
// Check whether we're done with mElements
if (elementsIdx == elementsLen) {
NS_ASSERTION(notInElementsIdx < notInElementsLen,
"Should have remaining not-in-elements");
// Append the remaining mNotInElements elements
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier.
aControls.AppendElements(mNotInElements.Elements() + notInElementsIdx,
notInElementsLen - notInElementsIdx);
break;
}
// Check whether we're done with mNotInElements
if (notInElementsIdx == notInElementsLen) {
NS_ASSERTION(elementsIdx < elementsLen,
"Should have remaining in-elements");
// Append the remaining mElements elements
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier.
aControls.AppendElements(mElements.Elements() + elementsIdx,
elementsLen - elementsIdx);
break;
}
// Both lists have elements left.
NS_ASSERTION(mElements[elementsIdx] && mNotInElements[notInElementsIdx],
"Should have remaining elements");
// Determine which of the two elements should be ordered
// first and add it to the end of the list.
nsGenericHTMLFormElement* elementToAdd;
if (HTMLFormElement::CompareFormControlPosition(
mElements[elementsIdx], mNotInElements[notInElementsIdx], mForm) <
0) {
elementToAdd = mElements[elementsIdx];
++elementsIdx;
} else {
elementToAdd = mNotInElements[notInElementsIdx];
++notInElementsIdx;
}
// Add the first element to the list.
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier.
aControls.AppendElement(elementToAdd);
}
NS_ASSERTION(aControls.Length() == elementsLen + notInElementsLen,
"Not all form controls were added to the sorted list");
#ifdef DEBUG
HTMLFormElement::AssertDocumentOrder(aControls, mForm);
#endif
return NS_OK;
}
Element* HTMLFormControlsCollection::GetElementAt(uint32_t aIndex) {
FlushPendingNotifications();
return mElements.SafeElementAt(aIndex, nullptr);
}
/* virtual */
nsINode* HTMLFormControlsCollection::GetParentObject() { return mForm; }
/* virtual */
Element* HTMLFormControlsCollection::GetFirstNamedElement(
const nsAString& aName, bool& aFound) {
Nullable<OwningRadioNodeListOrElement> maybeResult;
NamedGetter(aName, aFound, maybeResult);
if (!aFound) {
return nullptr;
}
MOZ_ASSERT(!maybeResult.IsNull());
const OwningRadioNodeListOrElement& result = maybeResult.Value();
if (result.IsElement()) {
return result.GetAsElement().get();
}
if (result.IsRadioNodeList()) {
RadioNodeList& nodelist = result.GetAsRadioNodeList();
return nodelist.Item(0)->AsElement();
}
MOZ_ASSERT_UNREACHABLE("Should only have Elements and NodeLists here.");
return nullptr;
}
void HTMLFormControlsCollection::NamedGetter(
const nsAString& aName, bool& aFound,
Nullable<OwningRadioNodeListOrElement>& aResult) {
nsISupports* item = NamedItemInternal(aName, true);
if (!item) {
aFound = false;
return;
}
aFound = true;
if (nsCOMPtr<Element> element = do_QueryInterface(item)) {
aResult.SetValue().SetAsElement() = element;
return;
}
if (nsCOMPtr<RadioNodeList> nodelist = do_QueryInterface(item)) {
aResult.SetValue().SetAsRadioNodeList() = nodelist;
return;
}
MOZ_ASSERT_UNREACHABLE("Should only have Elements and NodeLists here.");
}
void HTMLFormControlsCollection::GetSupportedNames(nsTArray<nsString>& aNames) {
FlushPendingNotifications();
// Just enumerate mNameLookupTable. This won't guarantee order, but
// that's OK, because the HTML5 spec doesn't define an order for
// this enumeration.
for (auto iter = mNameLookupTable.Iter(); !iter.Done(); iter.Next()) {
aNames.AppendElement(iter.Key());
}
}
/* virtual */
JSObject* HTMLFormControlsCollection::WrapObject(
JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
return HTMLFormControlsCollection_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla