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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 "nsFileControlFrame.h"
#include "nsGkAtoms.h"
#include "nsCOMPtr.h"
#include "mozilla/dom/BlobImpl.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/NodeInfo.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/DOMStringList.h"
#include "mozilla/dom/DataTransfer.h"
#include "mozilla/dom/Directory.h"
#include "mozilla/dom/DragEvent.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/FileList.h"
#include "mozilla/dom/HTMLButtonElement.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/dom/MutationEventBinding.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/StaticPrefs_dom.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentUtils.h"
#include "nsIFile.h"
#include "nsUnicodeProperties.h"
#include "mozilla/EventStates.h"
#include "nsTextNode.h"
#include "nsTextFrame.h"
using namespace mozilla;
using namespace mozilla::dom;
nsIFrame* NS_NewFileControlFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
return new (aPresShell)
nsFileControlFrame(aStyle, aPresShell->GetPresContext());
}
NS_IMPL_FRAMEARENA_HELPERS(nsFileControlFrame)
nsFileControlFrame::nsFileControlFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: nsBlockFrame(aStyle, aPresContext, kClassID) {
AddStateBits(NS_BLOCK_FLOAT_MGR);
}
void nsFileControlFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
nsBlockFrame::Init(aContent, aParent, aPrevInFlow);
mMouseListener = new DnDListener(this);
}
bool nsFileControlFrame::CropTextToWidth(gfxContext& aRenderingContext,
const nsIFrame* aFrame, nscoord aWidth,
nsString& aText) {
if (aText.IsEmpty()) {
return false;
}
RefPtr<nsFontMetrics> fm =
nsLayoutUtils::GetFontMetricsForFrame(aFrame, 1.0f);
// see if the text will completely fit in the width given
nscoord textWidth = nsLayoutUtils::AppUnitWidthOfStringBidi(
aText, aFrame, *fm, aRenderingContext);
if (textWidth <= aWidth) {
return false;
}
DrawTarget* drawTarget = aRenderingContext.GetDrawTarget();
const nsDependentString& kEllipsis = nsContentUtils::GetLocalizedEllipsis();
// see if the width is even smaller than the ellipsis
fm->SetTextRunRTL(false);
textWidth = nsLayoutUtils::AppUnitWidthOfString(kEllipsis, *fm, drawTarget);
if (textWidth >= aWidth) {
aText = kEllipsis;
return true;
}
// determine how much of the string will fit in the max width
nscoord totalWidth = textWidth;
using mozilla::unicode::ClusterIterator;
using mozilla::unicode::ClusterReverseIterator;
ClusterIterator leftIter(aText.Data(), aText.Length());
ClusterReverseIterator rightIter(aText.Data(), aText.Length());
const char16_t* leftPos = leftIter;
const char16_t* rightPos = rightIter;
const char16_t* pos;
ptrdiff_t length;
nsAutoString leftString, rightString;
while (leftPos < rightPos) {
leftIter.Next();
pos = leftIter;
length = pos - leftPos;
textWidth =
nsLayoutUtils::AppUnitWidthOfString(leftPos, length, *fm, drawTarget);
if (totalWidth + textWidth > aWidth) {
break;
}
leftString.Append(leftPos, length);
leftPos = pos;
totalWidth += textWidth;
if (leftPos >= rightPos) {
break;
}
rightIter.Next();
pos = rightIter;
length = rightPos - pos;
textWidth =
nsLayoutUtils::AppUnitWidthOfString(pos, length, *fm, drawTarget);
if (totalWidth + textWidth > aWidth) {
break;
}
rightString.Insert(pos, 0, length);
rightPos = pos;
totalWidth += textWidth;
}
aText = leftString + kEllipsis + rightString;
return true;
}
void nsFileControlFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aMetrics,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
// Restore the uncropped filename.
nsAutoString filename;
HTMLInputElement::FromNode(mContent)->GetDisplayFileName(filename);
bool done = false;
while (true) {
UpdateDisplayedValue(filename, false); // update the text node
AddStateBits(NS_BLOCK_NEEDS_BIDI_RESOLUTION);
LinesBegin()->MarkDirty();
nsBlockFrame::Reflow(aPresContext, aMetrics, aReflowInput, aStatus);
if (done) {
break;
}
nscoord lineISize = LinesBegin()->ISize();
const auto cbWM = aMetrics.GetWritingMode();
const auto wm = GetWritingMode();
nscoord iSize =
wm.IsOrthogonalTo(cbWM) ? aMetrics.BSize(cbWM) : aMetrics.ISize(cbWM);
auto bp = GetLogicalUsedBorderAndPadding(wm);
nscoord contentISize = iSize - bp.IStartEnd(wm);
if (lineISize > contentISize) {
// The filename overflows - crop it and reflow again (once).
// NOTE: the label frame might have bidi-continuations
auto* labelFrame = mTextContent->GetPrimaryFrame();
nscoord labelBP =
labelFrame->GetLogicalUsedBorderAndPadding(wm).IStartEnd(wm);
auto* lastLabelCont = labelFrame->LastContinuation();
if (lastLabelCont != labelFrame) {
labelBP +=
lastLabelCont->GetLogicalUsedBorderAndPadding(wm).IStartEnd(wm);
}
nscoord availableISizeForLabel = contentISize;
if (auto* buttonFrame = mBrowseFilesOrDirs->GetPrimaryFrame()) {
availableISizeForLabel -=
buttonFrame->ISize(wm) +
buttonFrame->GetLogicalUsedMargin(wm).IStartEnd(wm);
}
if (CropTextToWidth(*aReflowInput.mRenderingContext, labelFrame,
availableISizeForLabel - labelBP, filename)) {
nsBlockFrame::DidReflow(aPresContext, &aReflowInput);
aStatus.Reset();
labelFrame->MarkSubtreeDirty();
labelFrame->AddStateBits(NS_BLOCK_NEEDS_BIDI_RESOLUTION);
mCachedMinISize = NS_INTRINSIC_ISIZE_UNKNOWN;
mCachedPrefISize = NS_INTRINSIC_ISIZE_UNKNOWN;
done = true;
continue;
}
}
break;
}
}
void nsFileControlFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
NS_ENSURE_TRUE_VOID(mContent);
// Remove the events.
if (mContent) {
mContent->RemoveSystemEventListener(u"drop"_ns, mMouseListener, false);
mContent->RemoveSystemEventListener(u"dragover"_ns, mMouseListener, false);
}
aPostDestroyData.AddAnonymousContent(mTextContent.forget());
aPostDestroyData.AddAnonymousContent(mBrowseFilesOrDirs.forget());
mMouseListener->ForgetFrame();
nsBlockFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
static already_AddRefed<Element> MakeAnonButton(Document* 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->SetPseudoElementType(PseudoStyleType::fileSelectorButton);
// Set the file picking button text depending on the current locale.
nsAutoString buttonTxt;
nsContentUtils::GetMaybeLocalizedString(nsContentUtils::eFORMS_PROPERTIES,
labelKey, aDoc, 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 (button->NodeInfo()->NodeInfoManager())
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.
auto* buttonElement = HTMLButtonElement::FromNode(button);
if (!aAccessKey.IsEmpty()) {
buttonElement->SetAccessKey(aAccessKey, IgnoreErrors());
}
// We allow tabbing over the input itself, not the button.
buttonElement->SetTabIndex(-1, IgnoreErrors());
return button.forget();
}
nsresult nsFileControlFrame::CreateAnonymousContent(
nsTArray<ContentInfo>& aElements) {
nsCOMPtr<Document> doc = mContent->GetComposedDoc();
RefPtr<HTMLInputElement> fileContent =
HTMLInputElement::FromNodeOrNull(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) {
return NS_ERROR_OUT_OF_MEMORY;
}
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier, or change the return type to void.
aElements.AppendElement(mBrowseFilesOrDirs);
// Create and setup the text showing the selected files.
mTextContent = doc->CreateHTMLElement(nsGkAtoms::label);
// NOTE: SetIsNativeAnonymousRoot() has to be called before setting any
// attribute.
mTextContent->SetIsNativeAnonymousRoot();
RefPtr<nsTextNode> text =
new (doc->NodeInfoManager()) nsTextNode(doc->NodeInfoManager());
mTextContent->AppendChildTo(text, false);
// Update the displayed text to reflect the current element's value.
nsAutoString value;
fileContent->GetDisplayFileName(value);
UpdateDisplayedValue(value, false);
aElements.AppendElement(mTextContent);
// We should be able to interact with the element by doing drag and drop.
mContent->AddSystemEventListener(u"drop"_ns, mMouseListener, false);
mContent->AddSystemEventListener(u"dragover"_ns, 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, SystemCallerGuarantee(), err);
if (err.Failed()) {
err.SuppressException();
return;
}
nsCOMPtr<nsIFile> file;
nsresult rv = NS_NewLocalFile(fullpath, 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->AsGlobal(), 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(Event* aEvent) {
NS_ASSERTION(mFrame, "We should have been unregistered");
if (aEvent->DefaultPrevented()) {
return NS_OK;
}
DragEvent* dragEvent = aEvent->AsDragEvent();
if (!dragEvent) {
return NS_OK;
}
RefPtr<DataTransfer> dataTransfer = dragEvent->GetDataTransfer();
if (!IsValidDropData(dataTransfer)) {
return NS_OK;
}
RefPtr<HTMLInputElement> inputElement =
HTMLInputElement::FromNode(mFrame->GetContent());
bool supportsMultiple =
inputElement->HasAttr(kNameSpaceID_None, nsGkAtoms::multiple);
if (!CanDropTheseFiles(dataTransfer, supportsMultiple)) {
dataTransfer->SetDropEffect(u"none"_ns);
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();
RefPtr<FileList> fileList =
dataTransfer->GetFiles(*nsContentUtils::GetSystemPrincipal());
RefPtr<BlobImpl> webkitDir;
nsresult rv =
GetBlobImplForWebkitDirectory(fileList, getter_AddRefs(webkitDir));
NS_ENSURE_SUCCESS(rv, NS_OK);
nsTArray<OwningFileOrDirectory> array;
if (webkitDir) {
AppendBlobImplAsDirectory(array, webkitDir, inputElement);
inputElement->MozSetDndFilesAndDirectories(array);
} else {
bool blinkFileSystemEnabled =
StaticPrefs::dom_webkitBlink_filesystem_enabled();
bool dirPickerEnabled = StaticPrefs::dom_input_dirpicker();
if (blinkFileSystemEnabled || dirPickerEnabled) {
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(), inputElement);
} else {
OwningFileOrDirectory* element = array.AppendElement();
element->SetAsFile() = file;
}
}
}
}
}
// Entries API.
if (blinkFileSystemEnabled) {
// 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);
inputElement->UpdateEntries(array);
}
// Directory Upload API
else if (dirPickerEnabled) {
inputElement->SetFilesOrDirectories(array, true);
}
// Normal DnD
else {
inputElement->SetFiles(fileList, true);
}
RefPtr<TextEditor> textEditor;
DebugOnly<nsresult> rvIgnored =
nsContentUtils::DispatchInputEvent(inputElement);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"Failed to dispatch input event");
nsContentUtils::DispatchTrustedEvent(
inputElement->OwnerDoc(), static_cast<nsINode*>(inputElement),
u"change"_ns, CanBubble::eYes, Cancelable::eNo);
}
}
return NS_OK;
}
nsresult nsFileControlFrame::DnDListener::GetBlobImplForWebkitDirectory(
FileList* aFileList, BlobImpl** aBlobImpl) {
*aBlobImpl = nullptr;
HTMLInputElement* inputElement =
HTMLInputElement::FromNode(mFrame->GetContent());
bool webkitDirPicker =
StaticPrefs::dom_webkitBlink_dirPicker_enabled() &&
inputElement->HasAttr(kNameSpaceID_None, nsGkAtoms::webkitdirectory);
if (!webkitDirPicker) {
return NS_OK;
}
if (!aFileList) {
return NS_ERROR_FAILURE;
}
// webkitdirectory doesn't care about the length of the file list but
// only about the first item on it.
uint32_t len = aFileList->Length();
if (len) {
File* file = aFileList->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(
DataTransfer* aDataTransfer) {
if (!aDataTransfer) {
return false;
}
// We only support dropping files onto a file upload control
return aDataTransfer->HasFile();
}
bool nsFileControlFrame::DnDListener::CanDropTheseFiles(
DataTransfer* aDataTransfer, bool aSupportsMultiple) {
RefPtr<FileList> fileList =
aDataTransfer->GetFiles(*nsContentUtils::GetSystemPrincipal());
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) {
listLength = fileList->Length();
}
return listLength <= 1 || aSupportsMultiple;
}
nscoord nsFileControlFrame::GetMinISize(gfxContext* aRenderingContext) {
nscoord result;
DISPLAY_MIN_INLINE_SIZE(this, result);
// Our min inline size is our pref inline size
result = GetPrefISize(aRenderingContext);
return result;
}
nscoord nsFileControlFrame::GetPrefISize(gfxContext* aRenderingContext) {
nscoord result;
DISPLAY_PREF_INLINE_SIZE(this, result);
// Make sure we measure with the uncropped filename.
if (mCachedPrefISize == NS_INTRINSIC_ISIZE_UNKNOWN) {
nsAutoString filename;
HTMLInputElement::FromNode(mContent)->GetDisplayFileName(filename);
UpdateDisplayedValue(filename, false);
}
result = nsBlockFrame::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, u""_ns,
true);
} else {
mBrowseFilesOrDirs->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
}
}
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(u"FileControl"_ns, aResult);
}
#endif
void nsFileControlFrame::UpdateDisplayedValue(const nsAString& aValue,
bool aNotify) {
auto* text = Text::FromNode(mTextContent->GetFirstChild());
uint32_t oldLength = aNotify ? 0 : text->TextLength();
text->SetText(aValue, aNotify);
if (!aNotify) {
// We can't notify during Reflow so we need to tell the text frame
// about the text content change we just did.
if (auto* textFrame = static_cast<nsTextFrame*>(text->GetPrimaryFrame())) {
textFrame->NotifyNativeAnonymousTextnodeChange(oldLength);
}
nsBlockFrame* label = do_QueryFrame(mTextContent->GetPrimaryFrame());
if (label && label->LinesBegin() != label->LinesEnd()) {
label->AddStateBits(NS_BLOCK_NEEDS_BIDI_RESOLUTION);
label->LinesBegin()->MarkDirty();
}
}
}
nsresult nsFileControlFrame::SetFormProperty(nsAtom* 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)