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fune/layout/forms/nsFileControlFrame.cpp
Masayuki Nakano abe138f771 Bug 1504911 - part 1: Make all "input" event dispatcher in C++ use new utility method r=smaug 
Currently, a lot of code dispatch "input" event and some of them dispatch
"input" event with wrong interface and/or values.  Therefore this patch
creates nsContentUtils::DispatchInputEvent() to make all of them dispatch
correct event.

Unfortunately, due to bug 1506439, we cannot set pointer to refcountable
classes of MOZ_CAN_RUN_SCRIPT method to nullptr.  Therefore, this patch
creates temporary RefPtr<TextEditor> a lot even though it makes damage to
the performance if it's in a hot path.

This patch makes eEditorInput event dispatched with
InternalEditorInputEvent when "input" event should be dispatched with
dom::InputEvent.  However, this patch uses WidgetEvent whose message is
eUnidentifiedEvent and setting WidgetEvent::mSpecifiedEventType to
nsGkAtoms::oninput when "input" event should be dispatched with
dom::Event because we need to keep that eEditorInput and
InternalEditorInputEvent are mapped each other.

Differential Revision: https://phabricator.services.mozilla.com/D12244

--HG--
extra : moz-landing-system : lando
2018-11-21 03:59:02 +00:00

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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 "nsIDocument.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/StaticPrefs.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentUtils.h"
#include "mozilla/EventStates.h"
#include "nsTextNode.h"
#include "nsTextFrame.h"
using namespace mozilla;
using namespace mozilla::dom;
nsIFrame*
NS_NewFileControlFrame(nsIPresShell* aPresShell, ComputedStyle* aStyle)
{
return new (aPresShell) nsFileControlFrame(aStyle);
}
NS_IMPL_FRAMEARENA_HELPERS(nsFileControlFrame)
nsFileControlFrame::nsFileControlFrame(ComputedStyle* aStyle)
: nsBlockFrame(aStyle, 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);
}
auto* buttonFrame = mBrowseFilesOrDirs->GetPrimaryFrame();
nscoord availableISizeForLabel = contentISize - buttonFrame->ISize(wm) -
buttonFrame->GetLogicalUsedMargin(wm).IStartEnd(wm);
if (CropTextToWidth(*aReflowInput.mRenderingContext,
labelFrame,
availableISizeForLabel - labelBP,
filename)) {
nsBlockFrame::DidReflow(aPresContext, &aReflowInput);
aStatus.Reset();
labelFrame->AddStateBits(NS_FRAME_IS_DIRTY |
NS_BLOCK_NEEDS_BIDI_RESOLUTION);
mMinWidth = NS_INTRINSIC_WIDTH_UNKNOWN;
mPrefWidth = NS_INTRINSIC_WIDTH_UNKNOWN;
done = true;
continue;
}
}
break;
}
}
void
nsFileControlFrame::DestroyFrom(nsIFrame* aDestructRoot, PostDestroyData& aPostDestroyData)
{
NS_ENSURE_TRUE_VOID(mContent);
// Remove the events.
if (mContent) {
mContent->RemoveSystemEventListener(NS_LITERAL_STRING("drop"),
mMouseListener, false);
mContent->RemoveSystemEventListener(NS_LITERAL_STRING("dragover"),
mMouseListener, false);
}
aPostDestroyData.AddAnonymousContent(mTextContent.forget());
aPostDestroyData.AddAnonymousContent(mBrowseFilesOrDirs.forget());
mMouseListener->ForgetFrame();
nsBlockFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
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.
nsAutoString 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::FromNodeOrNull(button);
if (!aAccessKey.IsEmpty()) {
buttonElement->SetAccessKey(aAccessKey, IgnoreErrors());
}
// 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.
buttonElement->SetTabIndex(aInputElement->TabIndex(), IgnoreErrors());
return button.forget();
}
nsresult
nsFileControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
{
nsCOMPtr<nsIDocument> 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 || !aElements.AppendElement(mBrowseFilesOrDirs)) {
return NS_ERROR_OUT_OF_MEMORY;
}
// 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 nsTextNode(doc->NodeInfoManager());
mTextContent->AppendChildTo(text, false);
// Update the displayed text to reflect the current element's value.
nsAutoString value;
HTMLInputElement::FromNode(mContent)->GetDisplayFileName(value);
UpdateDisplayedValue(value, false);
aElements.AppendElement(mTextContent);
// 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, 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, 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(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();
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 =
Preferences::GetBool("dom.webkitBlink.filesystem.enabled", false);
bool dirPickerEnabled =
Preferences::GetBool("dom.input.dirpicker", false);
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),
NS_LITERAL_STRING("change"),
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
nsTArray<nsString> types;
aDataTransfer->GetTypes(types, CallerType::System);
return types.Contains(NS_LITERAL_STRING("Files"));
}
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_MIN_INLINE_SIZE(this, result);
// Make sure we measure with the uncropped filename.
if (mPrefWidth == NS_INTRINSIC_WIDTH_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,
EmptyString(), true);
} else {
mBrowseFilesOrDirs->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
}
}
nsresult
nsFileControlFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType)
{
if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::tabindex) {
if (aModType == MutationEvent_Binding::REMOVAL) {
mBrowseFilesOrDirs->UnsetAttr(aNameSpaceID, aAttribute, true);
} else {
nsAutoString value;
mContent->AsElement()->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)
{
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)
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