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Mypal/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 "mozilla/dom/Directory.h"
#include "mozilla/dom/FileList.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(&mBrowseFilesOrDirs);
mMouseListener->ForgetFrame();
nsBlockFrame::DestroyFrom(aDestructRoot);
}
static already_AddRefed<Element>
MakeAnonButton(nsIDocument* aDoc, const char* labelKey,
HTMLInputElement* aInputElement,
const nsAString& aAccessKey)
{
RefPtr<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.
RefPtr<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.
RefPtr<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();
RefPtr<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);
mBrowseFilesOrDirs = MakeAnonButton(doc, "Browse", fileContent, accessKey);
if (!mBrowseFilesOrDirs || !aElements.AppendElement(mBrowseFilesOrDirs)) {
return NS_ERROR_OUT_OF_MEMORY;
}
// Create and setup the text showing the selected files.
RefPtr<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 (mBrowseFilesOrDirs) {
aElements.AppendElement(mBrowseFilesOrDirs);
}
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)
{
}
static void
AppendBlobImplAsDirectory(nsTArray<OwningFileOrDirectory>& aArray,
BlobImpl* aBlobImpl,
nsIContent* aContent)
{
MOZ_ASSERT(aBlobImpl);
MOZ_ASSERT(aBlobImpl->IsDirectory());
nsAutoString fullpath;
ErrorResult err;
aBlobImpl->GetMozFullPath(fullpath, err);
if (err.Failed()) {
err.SuppressException();
return;
}
nsCOMPtr<nsIFile> file;
NS_ConvertUTF16toUTF8 path(fullpath);
nsresult rv = NS_NewNativeLocalFile(path, true, getter_AddRefs(file));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
nsPIDOMWindowInner* inner = aContent->OwnerDoc()->GetInnerWindow();
if (!inner || !inner->IsCurrentInnerWindow()) {
return;
}
RefPtr<Directory> directory =
Directory::Create(inner, file);
MOZ_ASSERT(directory);
OwningFileOrDirectory* element = aArray.AppendElement();
element->SetAsDirectory() = directory;
}
/**
* 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;
}
nsCOMPtr<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));
RefPtr<BlobImpl> webkitDir;
nsresult rv =
GetBlobImplForWebkitDirectory(fileList, getter_AddRefs(webkitDir));
NS_ENSURE_SUCCESS(rv, NS_OK);
nsTArray<OwningFileOrDirectory> array;
if (webkitDir) {
AppendBlobImplAsDirectory(array, webkitDir, content);
inputElement->MozSetDndFilesAndDirectories(array);
} else {
bool blinkFileSystemEnabled =
Preferences::GetBool("dom.webkitBlink.filesystem.enabled", false);
if (blinkFileSystemEnabled) {
FileList* files = static_cast<FileList*>(fileList.get());
if (files) {
for (uint32_t i = 0; i < files->Length(); ++i) {
File* file = files->Item(i);
if (file) {
if (file->Impl() && file->Impl()->IsDirectory()) {
AppendBlobImplAsDirectory(array, file->Impl(), content);
} else {
OwningFileOrDirectory* element = array.AppendElement();
element->SetAsFile() = file;
}
}
}
}
}
// This is rather ugly. Pass the directories as Files using SetFiles,
// but then if blink filesystem API is enabled, it wants
// FileOrDirectory array.
inputElement->SetFiles(fileList, true);
if (blinkFileSystemEnabled) {
inputElement->UpdateEntries(array);
}
nsContentUtils::DispatchTrustedEvent(content->OwnerDoc(), content,
NS_LITERAL_STRING("input"), true,
false);
nsContentUtils::DispatchTrustedEvent(content->OwnerDoc(), content,
NS_LITERAL_STRING("change"), true,
false);
}
}
return NS_OK;
}
nsresult
nsFileControlFrame::DnDListener::GetBlobImplForWebkitDirectory(nsIDOMFileList* aFileList,
BlobImpl** aBlobImpl)
{
*aBlobImpl = nullptr;
HTMLInputElement* inputElement =
HTMLInputElement::FromContent(mFrame->GetContent());
bool webkitDirPicker =
Preferences::GetBool("dom.webkitBlink.dirPicker.enabled", false) &&
inputElement->HasAttr(kNameSpaceID_None, nsGkAtoms::webkitdirectory);
if (!webkitDirPicker) {
return NS_OK;
}
if (!aFileList) {
return NS_ERROR_FAILURE;
}
FileList* files = static_cast<FileList*>(aFileList);
// webkitdirectory doesn't care about the length of the file list but
// only about the first item on it.
uint32_t len = files->Length();
if (len) {
File* file = files->Item(0);
if (file) {
BlobImpl* impl = file->Impl();
if (impl && impl->IsDirectory()) {
RefPtr<BlobImpl> retVal = impl;
retVal.swap(*aBlobImpl);
return NS_OK;
}
}
}
return NS_ERROR_FAILURE;
}
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
nsTArray<nsString> types;
dataTransfer->GetTypes(types, *nsContentUtils::GetSystemPrincipal());
return types.Contains(NS_LITERAL_STRING("Files"));
}
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));
RefPtr<BlobImpl> webkitDir;
nsresult rv =
GetBlobImplForWebkitDirectory(fileList, getter_AddRefs(webkitDir));
// Just check if either there isn't webkitdirectory attribute, or
// fileList has a directory which can be dropped to the element.
// No need to use webkitDir for anything here.
NS_ENSURE_SUCCESS(rv, false);
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)) {
mBrowseFilesOrDirs->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled,
EmptyString(), true);
} else {
mBrowseFilesOrDirs->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) {
mBrowseFilesOrDirs->UnsetAttr(aNameSpaceID, aAttribute, true);
} else {
nsAutoString value;
mContent->GetAttr(aNameSpaceID, aAttribute, value);
mBrowseFilesOrDirs->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 nsDisplayListSet& aLists)
{
BuildDisplayListForInline(aBuilder, aLists);
}
#ifdef ACCESSIBILITY
a11y::AccType
nsFileControlFrame::AccessibleType()
{
return a11y::eHTMLFileInputType;
}
#endif
////////////////////////////////////////////////////////////
// Mouse listener implementation
NS_IMPL_ISUPPORTS(nsFileControlFrame::MouseListener,
nsIDOMEventListener)
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