mirror of
https://github.com/mozilla/gecko-dev.git
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424 lines
12 KiB
C++
424 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/HTMLFormControlsCollection.h"
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#include "mozFlushType.h"
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#include "mozilla/dom/BindingUtils.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/HTMLFormControlsCollectionBinding.h"
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#include "mozilla/dom/HTMLFormElement.h"
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#include "nsGenericHTMLElement.h" // nsGenericHTMLFormElement
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#include "nsIDocument.h"
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#include "nsIDOMNode.h"
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#include "nsIDOMNodeList.h"
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#include "nsIFormControl.h"
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#include "RadioNodeList.h"
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#include "jsfriendapi.h"
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namespace mozilla {
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namespace dom {
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/* static */ bool
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HTMLFormControlsCollection::ShouldBeInElements(nsIFormControl* aFormControl)
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{
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// For backwards compatibility (with 4.x and IE) we must not add
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// <input type=image> elements to the list of form controls in a
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// form.
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switch (aFormControl->GetType()) {
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case NS_FORM_BUTTON_BUTTON :
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case NS_FORM_BUTTON_RESET :
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case NS_FORM_BUTTON_SUBMIT :
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case NS_FORM_INPUT_BUTTON :
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case NS_FORM_INPUT_CHECKBOX :
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case NS_FORM_INPUT_COLOR :
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case NS_FORM_INPUT_EMAIL :
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case NS_FORM_INPUT_FILE :
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case NS_FORM_INPUT_HIDDEN :
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case NS_FORM_INPUT_RESET :
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case NS_FORM_INPUT_PASSWORD :
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case NS_FORM_INPUT_RADIO :
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case NS_FORM_INPUT_SEARCH :
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case NS_FORM_INPUT_SUBMIT :
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case NS_FORM_INPUT_TEXT :
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case NS_FORM_INPUT_TEL :
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case NS_FORM_INPUT_URL :
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case NS_FORM_INPUT_NUMBER :
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case NS_FORM_INPUT_RANGE :
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case NS_FORM_INPUT_DATE :
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case NS_FORM_INPUT_TIME :
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case NS_FORM_SELECT :
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case NS_FORM_TEXTAREA :
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case NS_FORM_FIELDSET :
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case NS_FORM_OBJECT :
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case NS_FORM_OUTPUT :
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return true;
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}
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// These form control types are not supposed to end up in the
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// form.elements array
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//
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// NS_FORM_INPUT_IMAGE
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// NS_FORM_LABEL
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return false;
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}
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HTMLFormControlsCollection::HTMLFormControlsCollection(HTMLFormElement* aForm)
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: mForm(aForm)
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// Initialize the elements list to have an initial capacity
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// of 8 to reduce allocations on small forms.
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, mElements(8)
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, mNameLookupTable(HTMLFormElement::FORM_CONTROL_LIST_HASHTABLE_LENGTH)
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{
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}
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HTMLFormControlsCollection::~HTMLFormControlsCollection()
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{
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mForm = nullptr;
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Clear();
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}
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void
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HTMLFormControlsCollection::DropFormReference()
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{
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mForm = nullptr;
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Clear();
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}
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void
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HTMLFormControlsCollection::Clear()
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{
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// Null out childrens' pointer to me. No refcounting here
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for (int32_t i = mElements.Length() - 1; i >= 0; i--) {
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mElements[i]->ClearForm(false);
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}
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mElements.Clear();
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for (int32_t i = mNotInElements.Length() - 1; i >= 0; i--) {
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mNotInElements[i]->ClearForm(false);
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}
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mNotInElements.Clear();
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mNameLookupTable.Clear();
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}
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void
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HTMLFormControlsCollection::FlushPendingNotifications()
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{
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if (mForm) {
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nsIDocument* doc = mForm->GetUncomposedDoc();
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if (doc) {
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doc->FlushPendingNotifications(Flush_Content);
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}
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}
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLFormControlsCollection)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(HTMLFormControlsCollection)
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// Note: We intentionally don't set tmp->mForm to nullptr here, since doing
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// so may result in crashes because of inconsistent null-checking after the
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// object gets unlinked.
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tmp->Clear();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(HTMLFormControlsCollection)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNameLookupTable)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(HTMLFormControlsCollection)
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NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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// XPConnect interface list for HTMLFormControlsCollection
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NS_INTERFACE_TABLE_HEAD(HTMLFormControlsCollection)
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NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
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NS_INTERFACE_TABLE(HTMLFormControlsCollection,
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nsIHTMLCollection,
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nsIDOMHTMLCollection)
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NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(HTMLFormControlsCollection)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(HTMLFormControlsCollection)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(HTMLFormControlsCollection)
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// nsIDOMHTMLCollection interface
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NS_IMETHODIMP
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HTMLFormControlsCollection::GetLength(uint32_t* aLength)
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{
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FlushPendingNotifications();
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*aLength = mElements.Length();
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLFormControlsCollection::Item(uint32_t aIndex, nsIDOMNode** aReturn)
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{
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nsISupports* item = GetElementAt(aIndex);
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if (!item) {
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*aReturn = nullptr;
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return NS_OK;
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}
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return CallQueryInterface(item, aReturn);
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}
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NS_IMETHODIMP
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HTMLFormControlsCollection::NamedItem(const nsAString& aName,
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nsIDOMNode** aReturn)
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{
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FlushPendingNotifications();
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*aReturn = nullptr;
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nsCOMPtr<nsISupports> supports;
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if (!mNameLookupTable.Get(aName, getter_AddRefs(supports))) {
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// key not found
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return NS_OK;
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}
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if (!supports) {
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return NS_OK;
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}
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// We found something, check if it's a node
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CallQueryInterface(supports, aReturn);
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if (*aReturn) {
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return NS_OK;
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}
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// If not, we check if it's a node list.
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nsCOMPtr<nsIDOMNodeList> nodeList = do_QueryInterface(supports);
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NS_ASSERTION(nodeList, "Huh, what's going one here?");
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if (!nodeList) {
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return NS_OK;
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}
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// And since we're only asking for one node here, we return the first
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// one from the list.
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return nodeList->Item(0, aReturn);
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}
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nsISupports*
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HTMLFormControlsCollection::NamedItemInternal(const nsAString& aName,
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bool aFlushContent)
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{
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if (aFlushContent) {
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FlushPendingNotifications();
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}
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return mNameLookupTable.GetWeak(aName);
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}
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nsresult
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HTMLFormControlsCollection::AddElementToTable(nsGenericHTMLFormElement* aChild,
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const nsAString& aName)
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{
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if (!ShouldBeInElements(aChild)) {
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return NS_OK;
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}
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return mForm->AddElementToTableInternal(mNameLookupTable, aChild, aName);
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}
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nsresult
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HTMLFormControlsCollection::IndexOfControl(nsIFormControl* aControl,
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int32_t* aIndex)
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{
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// Note -- not a DOM method; callers should handle flushing themselves
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NS_ENSURE_ARG_POINTER(aIndex);
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*aIndex = mElements.IndexOf(aControl);
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return NS_OK;
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}
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nsresult
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HTMLFormControlsCollection::RemoveElementFromTable(
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nsGenericHTMLFormElement* aChild, const nsAString& aName)
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{
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if (!ShouldBeInElements(aChild)) {
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return NS_OK;
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}
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return mForm->RemoveElementFromTableInternal(mNameLookupTable, aChild, aName);
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}
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nsresult
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HTMLFormControlsCollection::GetSortedControls(
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nsTArray<nsGenericHTMLFormElement*>& aControls) const
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{
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#ifdef DEBUG
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HTMLFormElement::AssertDocumentOrder(mElements, mForm);
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HTMLFormElement::AssertDocumentOrder(mNotInElements, mForm);
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#endif
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aControls.Clear();
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// Merge the elements list and the not in elements list. Both lists are
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// already sorted.
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uint32_t elementsLen = mElements.Length();
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uint32_t notInElementsLen = mNotInElements.Length();
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aControls.SetCapacity(elementsLen + notInElementsLen);
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uint32_t elementsIdx = 0;
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uint32_t notInElementsIdx = 0;
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while (elementsIdx < elementsLen || notInElementsIdx < notInElementsLen) {
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// Check whether we're done with mElements
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if (elementsIdx == elementsLen) {
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NS_ASSERTION(notInElementsIdx < notInElementsLen,
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"Should have remaining not-in-elements");
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// Append the remaining mNotInElements elements
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if (!aControls.AppendElements(mNotInElements.Elements() +
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notInElementsIdx,
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notInElementsLen -
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notInElementsIdx)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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break;
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}
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// Check whether we're done with mNotInElements
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if (notInElementsIdx == notInElementsLen) {
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NS_ASSERTION(elementsIdx < elementsLen,
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"Should have remaining in-elements");
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// Append the remaining mElements elements
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if (!aControls.AppendElements(mElements.Elements() +
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elementsIdx,
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elementsLen -
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elementsIdx)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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break;
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}
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// Both lists have elements left.
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NS_ASSERTION(mElements[elementsIdx] &&
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mNotInElements[notInElementsIdx],
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"Should have remaining elements");
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// Determine which of the two elements should be ordered
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// first and add it to the end of the list.
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nsGenericHTMLFormElement* elementToAdd;
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if (HTMLFormElement::CompareFormControlPosition(
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mElements[elementsIdx], mNotInElements[notInElementsIdx], mForm) < 0) {
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elementToAdd = mElements[elementsIdx];
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++elementsIdx;
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} else {
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elementToAdd = mNotInElements[notInElementsIdx];
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++notInElementsIdx;
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}
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// Add the first element to the list.
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if (!aControls.AppendElement(elementToAdd)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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NS_ASSERTION(aControls.Length() == elementsLen + notInElementsLen,
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"Not all form controls were added to the sorted list");
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#ifdef DEBUG
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HTMLFormElement::AssertDocumentOrder(aControls, mForm);
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#endif
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return NS_OK;
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}
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Element*
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HTMLFormControlsCollection::GetElementAt(uint32_t aIndex)
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{
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FlushPendingNotifications();
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return mElements.SafeElementAt(aIndex, nullptr);
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}
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/* virtual */ nsINode*
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HTMLFormControlsCollection::GetParentObject()
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{
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return mForm;
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}
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/* virtual */ Element*
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HTMLFormControlsCollection::GetFirstNamedElement(const nsAString& aName, bool& aFound)
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{
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Nullable<OwningRadioNodeListOrElement> maybeResult;
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NamedGetter(aName, aFound, maybeResult);
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if (!aFound) {
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return nullptr;
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}
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MOZ_ASSERT(!maybeResult.IsNull());
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const OwningRadioNodeListOrElement& result = maybeResult.Value();
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if (result.IsElement()) {
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return result.GetAsElement().get();
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}
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if (result.IsRadioNodeList()) {
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RadioNodeList& nodelist = result.GetAsRadioNodeList();
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return nodelist.Item(0)->AsElement();
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}
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MOZ_ASSERT_UNREACHABLE("Should only have Elements and NodeLists here.");
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return nullptr;
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}
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void
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HTMLFormControlsCollection::NamedGetter(const nsAString& aName,
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bool& aFound,
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Nullable<OwningRadioNodeListOrElement>& aResult)
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{
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nsISupports* item = NamedItemInternal(aName, true);
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if (!item) {
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aFound = false;
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return;
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}
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aFound = true;
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if (nsCOMPtr<Element> element = do_QueryInterface(item)) {
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aResult.SetValue().SetAsElement() = element;
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return;
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}
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if (nsCOMPtr<RadioNodeList> nodelist = do_QueryInterface(item)) {
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aResult.SetValue().SetAsRadioNodeList() = nodelist;
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return;
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}
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MOZ_ASSERT_UNREACHABLE("Should only have Elements and NodeLists here.");
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}
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static PLDHashOperator
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CollectNames(const nsAString& aName,
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nsISupports* /* unused */,
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void* aClosure)
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{
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static_cast<nsTArray<nsString>*>(aClosure)->AppendElement(aName);
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return PL_DHASH_NEXT;
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}
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void
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HTMLFormControlsCollection::GetSupportedNames(unsigned aFlags,
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nsTArray<nsString>& aNames)
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{
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if (!(aFlags & JSITER_HIDDEN)) {
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return;
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}
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FlushPendingNotifications();
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// Just enumerate mNameLookupTable. This won't guarantee order, but
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// that's OK, because the HTML5 spec doesn't define an order for
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// this enumeration.
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mNameLookupTable.EnumerateRead(CollectNames, &aNames);
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}
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/* virtual */ JSObject*
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HTMLFormControlsCollection::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return HTMLFormControlsCollectionBinding::Wrap(aCx, this, aGivenProto);
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}
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} // namespace dom
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} // namespace mozilla
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