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gecko-dev/layout/forms/nsFileControlFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsFileControlFrame.h"
#include "nsGkAtoms.h"
#include "nsCOMPtr.h"
#include "nsIDocument.h"
#include "mozilla/dom/NodeInfo.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/DataTransfer.h"
#include "mozilla/dom/HTMLButtonElement.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/Preferences.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentUtils.h"
#include "mozilla/EventStates.h"
#include "mozilla/dom/DOMStringList.h"
#include "nsIDOMDragEvent.h"
#include "nsIDOMFileList.h"
#include "nsContentList.h"
#include "nsIDOMMutationEvent.h"
#include "nsTextNode.h"
using namespace mozilla;
using namespace mozilla::dom;
nsIFrame*
NS_NewFileControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsFileControlFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsFileControlFrame)
nsFileControlFrame::nsFileControlFrame(nsStyleContext* aContext)
: nsBlockFrame(aContext)
{
AddStateBits(NS_BLOCK_FLOAT_MGR);
}
void
nsFileControlFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
nsBlockFrame::Init(aContent, aParent, aPrevInFlow);
mMouseListener = new DnDListener(this);
}
void
nsFileControlFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
ENSURE_TRUE(mContent);
// Remove the events.
if (mContent) {
mContent->RemoveSystemEventListener(NS_LITERAL_STRING("drop"),
mMouseListener, false);
mContent->RemoveSystemEventListener(NS_LITERAL_STRING("dragover"),
mMouseListener, false);
}
nsContentUtils::DestroyAnonymousContent(&mTextContent);
nsContentUtils::DestroyAnonymousContent(&mBrowseDirs);
nsContentUtils::DestroyAnonymousContent(&mBrowseFiles);
mMouseListener->ForgetFrame();
nsBlockFrame::DestroyFrom(aDestructRoot);
}
static already_AddRefed<Element>
MakeAnonButton(nsIDocument* aDoc, const char* labelKey,
HTMLInputElement* aInputElement,
const nsAString& aAccessKey)
{
nsRefPtr<Element> button = aDoc->CreateHTMLElement(nsGkAtoms::button);
// NOTE: SetIsNativeAnonymousRoot() has to be called before setting any
// attribute.
button->SetIsNativeAnonymousRoot();
button->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
NS_LITERAL_STRING("button"), false);
// Set the file picking button text depending on the current locale.
nsXPIDLString buttonTxt;
nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES,
labelKey, buttonTxt);
// Set the browse button text. It's a bit of a pain to do because we want to
// make sure we are not notifying.
nsRefPtr<nsTextNode> textContent =
new nsTextNode(button->NodeInfo()->NodeInfoManager());
textContent->SetText(buttonTxt, false);
nsresult rv = button->AppendChildTo(textContent, false);
if (NS_FAILED(rv)) {
return nullptr;
}
// Make sure access key and tab order for the element actually redirect to the
// file picking button.
nsRefPtr<HTMLButtonElement> buttonElement =
HTMLButtonElement::FromContentOrNull(button);
if (!aAccessKey.IsEmpty()) {
buttonElement->SetAccessKey(aAccessKey);
}
// Both elements are given the same tab index so that the user can tab
// to the file control at the correct index, and then between the two
// buttons.
int32_t tabIndex;
aInputElement->GetTabIndex(&tabIndex);
buttonElement->SetTabIndex(tabIndex);
return button.forget();
}
nsresult
nsFileControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
{
nsCOMPtr<nsIDocument> doc = mContent->GetComposedDoc();
nsIContent* content = GetContent();
bool isDirPicker = Preferences::GetBool("dom.input.dirpicker", false) &&
content && content->HasAttr(kNameSpaceID_None, nsGkAtoms::directory);
nsRefPtr<HTMLInputElement> fileContent = HTMLInputElement::FromContentOrNull(mContent);
// The access key is transferred to the "Choose files..." button only. In
// effect that access key allows access to the control via that button, then
// the user can tab between the two buttons.
nsAutoString accessKey;
fileContent->GetAccessKey(accessKey);
mBrowseFiles = MakeAnonButton(doc, isDirPicker ? "ChooseFiles" : "Browse",
fileContent, accessKey);
if (!mBrowseFiles || !aElements.AppendElement(mBrowseFiles)) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (isDirPicker) {
mBrowseDirs = MakeAnonButton(doc, "ChooseDirs", fileContent, EmptyString());
// Setting the 'directory' attribute is simply a means of allowing our
// event handling code in HTMLInputElement.cpp to distinguish between a
// click on the "Choose files" button from the "Choose a folder" button.
mBrowseDirs->SetAttr(kNameSpaceID_None, nsGkAtoms::directory,
EmptyString(), false);
if (!mBrowseDirs || !aElements.AppendElement(mBrowseDirs)) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
// Create and setup the text showing the selected files.
nsRefPtr<NodeInfo> nodeInfo;
nodeInfo = doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::label, nullptr,
kNameSpaceID_XUL,
nsIDOMNode::ELEMENT_NODE);
NS_TrustedNewXULElement(getter_AddRefs(mTextContent), nodeInfo.forget());
// NOTE: SetIsNativeAnonymousRoot() has to be called before setting any
// attribute.
mTextContent->SetIsNativeAnonymousRoot();
mTextContent->SetAttr(kNameSpaceID_None, nsGkAtoms::crop,
NS_LITERAL_STRING("center"), false);
// Update the displayed text to reflect the current element's value.
nsAutoString value;
HTMLInputElement::FromContent(mContent)->GetDisplayFileName(value);
UpdateDisplayedValue(value, false);
if (!aElements.AppendElement(mTextContent)) {
return NS_ERROR_OUT_OF_MEMORY;
}
// We should be able to interact with the element by doing drag and drop.
mContent->AddSystemEventListener(NS_LITERAL_STRING("drop"),
mMouseListener, false);
mContent->AddSystemEventListener(NS_LITERAL_STRING("dragover"),
mMouseListener, false);
SyncDisabledState();
return NS_OK;
}
void
nsFileControlFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
uint32_t aFilter)
{
if (mBrowseFiles) {
aElements.AppendElement(mBrowseFiles);
}
if (mBrowseDirs) {
aElements.AppendElement(mBrowseDirs);
}
if (mTextContent) {
aElements.AppendElement(mTextContent);
}
}
NS_QUERYFRAME_HEAD(nsFileControlFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
void
nsFileControlFrame::SetFocus(bool aOn, bool aRepaint)
{
}
/**
* This is called when we receive a drop or a dragover.
*/
NS_IMETHODIMP
nsFileControlFrame::DnDListener::HandleEvent(nsIDOMEvent* aEvent)
{
NS_ASSERTION(mFrame, "We should have been unregistered");
bool defaultPrevented = false;
aEvent->GetDefaultPrevented(&defaultPrevented);
if (defaultPrevented) {
return NS_OK;
}
nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent);
if (!dragEvent) {
return NS_OK;
}
nsCOMPtr<nsIDOMDataTransfer> dataTransfer;
dragEvent->GetDataTransfer(getter_AddRefs(dataTransfer));
if (!IsValidDropData(dataTransfer)) {
return NS_OK;
}
nsIContent* content = mFrame->GetContent();
bool supportsMultiple = content && content->HasAttr(kNameSpaceID_None, nsGkAtoms::multiple);
if (!CanDropTheseFiles(dataTransfer, supportsMultiple)) {
dataTransfer->SetDropEffect(NS_LITERAL_STRING("none"));
aEvent->StopPropagation();
return NS_OK;
}
nsAutoString eventType;
aEvent->GetType(eventType);
if (eventType.EqualsLiteral("dragover")) {
// Prevent default if we can accept this drag data
aEvent->PreventDefault();
return NS_OK;
}
if (eventType.EqualsLiteral("drop")) {
aEvent->StopPropagation();
aEvent->PreventDefault();
NS_ASSERTION(content, "The frame has no content???");
HTMLInputElement* inputElement = HTMLInputElement::FromContent(content);
NS_ASSERTION(inputElement, "No input element for this file upload control frame!");
nsCOMPtr<nsIDOMFileList> fileList;
dataTransfer->GetFiles(getter_AddRefs(fileList));
inputElement->SetFiles(fileList, true);
nsContentUtils::DispatchTrustedEvent(content->OwnerDoc(), content,
NS_LITERAL_STRING("change"), true,
false);
}
return NS_OK;
}
/* static */ bool
nsFileControlFrame::DnDListener::IsValidDropData(nsIDOMDataTransfer* aDOMDataTransfer)
{
nsCOMPtr<DataTransfer> dataTransfer = do_QueryInterface(aDOMDataTransfer);
NS_ENSURE_TRUE(dataTransfer, false);
// We only support dropping files onto a file upload control
nsRefPtr<DOMStringList> types = dataTransfer->Types();
return types->Contains(NS_LITERAL_STRING("Files"));
}
/* static */ bool
nsFileControlFrame::DnDListener::CanDropTheseFiles(nsIDOMDataTransfer* aDOMDataTransfer,
bool aSupportsMultiple)
{
nsCOMPtr<DataTransfer> dataTransfer = do_QueryInterface(aDOMDataTransfer);
NS_ENSURE_TRUE(dataTransfer, false);
nsCOMPtr<nsIDOMFileList> fileList;
dataTransfer->GetFiles(getter_AddRefs(fileList));
uint32_t listLength = 0;
if (fileList) {
fileList->GetLength(&listLength);
}
return listLength <= 1 || aSupportsMultiple;
}
nscoord
nsFileControlFrame::GetMinISize(nsRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_MIN_WIDTH(this, result);
// Our min width is our pref width
result = GetPrefISize(aRenderingContext);
return result;
}
void
nsFileControlFrame::SyncDisabledState()
{
EventStates eventStates = mContent->AsElement()->State();
if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
mBrowseFiles->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
true);
if (mBrowseDirs) {
mBrowseDirs->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
true);
}
} else {
mBrowseFiles->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
if (mBrowseDirs) {
mBrowseDirs->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
}
}
}
nsresult
nsFileControlFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::tabindex) {
if (aModType == nsIDOMMutationEvent::REMOVAL) {
mBrowseFiles->UnsetAttr(aNameSpaceID, aAttribute, true);
if (mBrowseDirs) {
mBrowseDirs->UnsetAttr(aNameSpaceID, aAttribute, true);
}
} else {
nsAutoString value;
mContent->GetAttr(aNameSpaceID, aAttribute, value);
mBrowseFiles->SetAttr(aNameSpaceID, aAttribute, value, true);
if (mBrowseDirs) {
mBrowseDirs->SetAttr(aNameSpaceID, aAttribute, value, true);
}
}
}
return nsBlockFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
void
nsFileControlFrame::ContentStatesChanged(EventStates aStates)
{
if (aStates.HasState(NS_EVENT_STATE_DISABLED)) {
nsContentUtils::AddScriptRunner(new SyncDisabledStateEvent(this));
}
}
#ifdef DEBUG_FRAME_DUMP
nsresult
nsFileControlFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("FileControl"), aResult);
}
#endif
void
nsFileControlFrame::UpdateDisplayedValue(const nsAString& aValue, bool aNotify)
{
mTextContent->SetAttr(kNameSpaceID_None, nsGkAtoms::value, aValue, aNotify);
}
nsresult
nsFileControlFrame::SetFormProperty(nsIAtom* aName,
const nsAString& aValue)
{
if (nsGkAtoms::value == aName) {
UpdateDisplayedValue(aValue, true);
}
return NS_OK;
}
void
nsFileControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
BuildDisplayListForInline(aBuilder, aDirtyRect, aLists);
}
#ifdef ACCESSIBILITY
a11y::AccType
nsFileControlFrame::AccessibleType()
{
return a11y::eHTMLFileInputType;
}
#endif
////////////////////////////////////////////////////////////
// Mouse listener implementation
NS_IMPL_ISUPPORTS(nsFileControlFrame::MouseListener,
nsIDOMEventListener)
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