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gecko/layout/forms/nsFileControlFrame.cpp
Gervase Markham ca171eec44 Bug 716478 - update licence to MPL 2.
2012-05-21 12:12:37 +01:00

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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 "nsIContent.h"
#include "prtypes.h"
#include "nsIAtom.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "nsWidgetsCID.h"
#include "nsIComponentManager.h"
#include "nsHTMLParts.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIFormControl.h"
#include "nsINameSpaceManager.h"
#include "nsCOMPtr.h"
#include "nsIDOMElement.h"
#include "nsIDOMDocument.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsPIDOMWindow.h"
#include "nsIFilePicker.h"
#include "nsIDOMMouseEvent.h"
#include "nsINodeInfo.h"
#include "nsIDOMEventTarget.h"
#include "nsILocalFile.h"
#include "nsHTMLInputElement.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentUtils.h"
#include "nsDisplayList.h"
#include "nsIDOMNSEvent.h"
#include "nsEventListenerManager.h"
#ifdef ACCESSIBILITY
#include "nsAccessibilityService.h"
#endif
#include "nsInterfaceHashtable.h"
#include "nsURIHashKey.h"
#include "nsNetCID.h"
#include "nsWeakReference.h"
#include "nsIVariant.h"
#include "mozilla/Services.h"
#include "nsDirectoryServiceDefs.h"
#include "nsICapturePicker.h"
#include "nsIFileURL.h"
#include "nsDOMFile.h"
#include "nsEventStates.h"
#include "nsTextControlFrame.h"
#include "nsIDOMDOMStringList.h"
#include "nsIDOMDragEvent.h"
namespace dom = mozilla::dom;
#define SYNC_TEXT 0x1
#define SYNC_BUTTON 0x2
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);
}
NS_IMETHODIMP
nsFileControlFrame::Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow)
{
nsresult rv = nsBlockFrame::Init(aContent, aParent, aPrevInFlow);
NS_ENSURE_SUCCESS(rv, rv);
mMouseListener = new BrowseMouseListener(this);
NS_ENSURE_TRUE(mMouseListener, NS_ERROR_OUT_OF_MEMORY);
mCaptureMouseListener = new CaptureMouseListener(this);
NS_ENSURE_TRUE(mCaptureMouseListener, NS_ERROR_OUT_OF_MEMORY);
return rv;
}
void
nsFileControlFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
ENSURE_TRUE(mContent);
// Remove the drag events
if (mContent) {
mContent->RemoveSystemEventListener(NS_LITERAL_STRING("drop"),
mMouseListener, false);
mContent->RemoveSystemEventListener(NS_LITERAL_STRING("dragover"),
mMouseListener, false);
}
// remove mMouseListener as a mouse event listener (bug 40533, bug 355931)
nsContentUtils::DestroyAnonymousContent(&mCapture);
if (mBrowse) {
mBrowse->RemoveSystemEventListener(NS_LITERAL_STRING("click"),
mMouseListener, false);
}
nsContentUtils::DestroyAnonymousContent(&mBrowse);
if (mTextContent) {
mTextContent->RemoveSystemEventListener(NS_LITERAL_STRING("click"),
mMouseListener, false);
}
nsContentUtils::DestroyAnonymousContent(&mTextContent);
mCaptureMouseListener->ForgetFrame();
mMouseListener->ForgetFrame();
nsBlockFrame::DestroyFrom(aDestructRoot);
}
nsresult
nsFileControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
{
// Get the NodeInfoManager and tag necessary to create input elements
nsCOMPtr<nsIDocument> doc = mContent->GetDocument();
nsCOMPtr<nsINodeInfo> nodeInfo;
nodeInfo = doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::input, nsnull,
kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
// Create the text content
NS_NewHTMLElement(getter_AddRefs(mTextContent), nodeInfo.forget(),
dom::NOT_FROM_PARSER);
if (!mTextContent)
return NS_ERROR_OUT_OF_MEMORY;
// Mark the element to be native anonymous before setting any attributes.
mTextContent->SetNativeAnonymous();
mTextContent->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
NS_LITERAL_STRING("text"), false);
nsHTMLInputElement* inputElement =
nsHTMLInputElement::FromContent(mContent);
NS_ASSERTION(inputElement, "Why is our content not a <input>?");
// Initialize value when we create the content in case the value was set
// before we got here
nsAutoString value;
inputElement->GetDisplayFileName(value);
nsCOMPtr<nsIDOMHTMLInputElement> textControl = do_QueryInterface(mTextContent);
NS_ASSERTION(textControl, "Why is the <input> we created not a <input>?");
textControl->SetValue(value);
textControl->SetTabIndex(-1);
textControl->SetReadOnly(true);
if (!aElements.AppendElement(mTextContent))
return NS_ERROR_OUT_OF_MEMORY;
// Register the whole frame as an event listener of drag events
mContent->AddSystemEventListener(NS_LITERAL_STRING("drop"),
mMouseListener, false);
mContent->AddSystemEventListener(NS_LITERAL_STRING("dragover"),
mMouseListener, false);
// Register as an event listener of the textbox
// to open file dialog on mouse click
mTextContent->AddSystemEventListener(NS_LITERAL_STRING("click"),
mMouseListener, false);
// Create the browse button
nodeInfo = doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::input, nsnull,
kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
NS_NewHTMLElement(getter_AddRefs(mBrowse), nodeInfo.forget(),
dom::NOT_FROM_PARSER);
if (!mBrowse)
return NS_ERROR_OUT_OF_MEMORY;
// Mark the element to be native anonymous before setting any attributes.
mBrowse->SetNativeAnonymous();
mBrowse->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
NS_LITERAL_STRING("button"), false);
// Create the capture button
nsCOMPtr<nsICapturePicker> capturePicker;
capturePicker = do_GetService("@mozilla.org/capturepicker;1");
if (capturePicker) {
CaptureCallbackData data;
data.picker = capturePicker;
data.mode = GetCaptureMode(data);
if (data.mode != 0) {
mCaptureMouseListener->mMode = data.mode;
nodeInfo = doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::input, nsnull,
kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
NS_NewHTMLElement(getter_AddRefs(mCapture), nodeInfo.forget(),
dom::NOT_FROM_PARSER);
if (!mCapture)
return NS_ERROR_OUT_OF_MEMORY;
// Mark the element to be native anonymous before setting any attributes.
mCapture->SetNativeAnonymous();
mCapture->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
NS_LITERAL_STRING("button"), false);
mCapture->SetAttr(kNameSpaceID_None, nsGkAtoms::value,
NS_LITERAL_STRING("capture"), false);
mCapture->AddSystemEventListener(NS_LITERAL_STRING("click"),
mCaptureMouseListener, false);
}
}
nsCOMPtr<nsIDOMHTMLInputElement> fileContent = do_QueryInterface(mContent);
nsCOMPtr<nsIDOMHTMLInputElement> browseControl = do_QueryInterface(mBrowse);
if (fileContent && browseControl) {
PRInt32 tabIndex;
nsAutoString accessKey;
fileContent->GetAccessKey(accessKey);
browseControl->SetAccessKey(accessKey);
fileContent->GetTabIndex(&tabIndex);
browseControl->SetTabIndex(tabIndex);
}
if (!aElements.AppendElement(mBrowse))
return NS_ERROR_OUT_OF_MEMORY;
if (mCapture && !aElements.AppendElement(mCapture))
return NS_ERROR_OUT_OF_MEMORY;
// Register as an event listener of the button
// to open file dialog on mouse click
mBrowse->AddSystemEventListener(NS_LITERAL_STRING("click"),
mMouseListener, false);
SyncAttr(kNameSpaceID_None, nsGkAtoms::size, SYNC_TEXT);
SyncDisabledState();
return NS_OK;
}
void
nsFileControlFrame::AppendAnonymousContentTo(nsBaseContentList& aElements,
PRUint32 aFilter)
{
aElements.MaybeAppendElement(mTextContent);
aElements.MaybeAppendElement(mBrowse);
aElements.MaybeAppendElement(mCapture);
}
NS_QUERYFRAME_HEAD(nsFileControlFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
void
nsFileControlFrame::SetFocus(bool aOn, bool aRepaint)
{
}
bool ShouldProcessMouseClick(nsIDOMEvent* aMouseEvent)
{
// only allow the left button
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aMouseEvent);
nsCOMPtr<nsIDOMNSEvent> domNSEvent = do_QueryInterface(aMouseEvent);
NS_ENSURE_TRUE(mouseEvent && domNSEvent, false);
bool defaultPrevented = false;
domNSEvent->GetPreventDefault(&defaultPrevented);
if (defaultPrevented) {
return false;
}
PRUint16 whichButton;
if (NS_FAILED(mouseEvent->GetButton(&whichButton)) || whichButton != 0) {
return false;
}
PRInt32 clickCount;
if (NS_FAILED(mouseEvent->GetDetail(&clickCount)) || clickCount > 1) {
return false;
}
return true;
}
/**
* This is called when our capture button is clicked
*/
NS_IMETHODIMP
nsFileControlFrame::CaptureMouseListener::HandleEvent(nsIDOMEvent* aMouseEvent)
{
nsresult rv;
NS_ASSERTION(mFrame, "We should have been unregistered");
if (!ShouldProcessMouseClick(aMouseEvent))
return NS_OK;
// Get parent nsPIDOMWindow object.
nsIContent* content = mFrame->GetContent();
if (!content)
return NS_ERROR_FAILURE;
nsHTMLInputElement* inputElement = nsHTMLInputElement::FromContent(content);
if (!inputElement)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDocument> doc = content->GetDocument();
if (!doc)
return NS_ERROR_FAILURE;
// Get Loc title
nsXPIDLString title;
nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES,
"MediaUpload", title);
nsPIDOMWindow* win = doc->GetWindow();
if (!win) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsICapturePicker> capturePicker;
capturePicker = do_CreateInstance("@mozilla.org/capturepicker;1");
if (!capturePicker)
return NS_ERROR_FAILURE;
rv = capturePicker->Init(win, title, mMode);
NS_ENSURE_SUCCESS(rv, rv);
// Show dialog
PRUint32 result;
rv = capturePicker->Show(&result);
NS_ENSURE_SUCCESS(rv, rv);
if (result == nsICapturePicker::RETURN_CANCEL)
return NS_OK;
if (!mFrame) {
// The frame got destroyed while the filepicker was up. Don't do
// anything here.
// (This listener itself can't be destroyed because the event listener
// manager holds a strong reference to us while it fires the event.)
return NS_OK;
}
nsCOMPtr<nsIDOMFile> domFile;
rv = capturePicker->GetFile(getter_AddRefs(domFile));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMArray<nsIDOMFile> newFiles;
if (domFile) {
newFiles.AppendObject(domFile);
} else {
return NS_ERROR_FAILURE;
}
// XXXkhuey we really should have a better UI story than the tired old
// uneditable text box with the file name inside.
// Set new selected files
if (newFiles.Count()) {
// Tell our input element that this update of the value is a user
// initiated change. Otherwise it'll think that the value is being set by
// a script and not fire onchange when it should.
inputElement->SetFiles(newFiles, true);
// Should fire a change event here since the SetFiles() call above ensures
// a different value from the mFocusedValue of the inputElement.
inputElement->FireChangeEventIfNeeded();
}
return NS_OK;
}
/**
* This is called when we receive any registered events on the control.
* We've only registered for drop, dragover and click events.
*/
NS_IMETHODIMP
nsFileControlFrame::BrowseMouseListener::HandleEvent(nsIDOMEvent* aEvent)
{
NS_ASSERTION(mFrame, "We should have been unregistered");
nsAutoString eventType;
aEvent->GetType(eventType);
if (eventType.EqualsLiteral("click")) {
if (!ShouldProcessMouseClick(aEvent))
return NS_OK;
nsHTMLInputElement* input =
nsHTMLInputElement::FromContent(mFrame->GetContent());
return input ? input->FireAsyncClickHandler() : NS_OK;
}
nsCOMPtr<nsIDOMNSEvent> domNSEvent = do_QueryInterface(aEvent);
NS_ENSURE_STATE(domNSEvent);
bool defaultPrevented = false;
domNSEvent->GetPreventDefault(&defaultPrevented);
if (defaultPrevented) {
return NS_OK;
}
nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent);
if (!dragEvent || !IsValidDropData(dragEvent)) {
return NS_OK;
}
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();
nsIContent* content = mFrame->GetContent();
NS_ASSERTION(content, "The frame has no content???");
nsHTMLInputElement* inputElement = nsHTMLInputElement::FromContent(content);
NS_ASSERTION(inputElement, "No input element for this file upload control frame!");
nsCOMPtr<nsIDOMDataTransfer> dataTransfer;
dragEvent->GetDataTransfer(getter_AddRefs(dataTransfer));
nsCOMPtr<nsIDOMFileList> fileList;
dataTransfer->GetFiles(getter_AddRefs(fileList));
inputElement->SetFiles(fileList, true);
inputElement->FireChangeEventIfNeeded();
}
return NS_OK;
}
/* static */ bool
nsFileControlFrame::BrowseMouseListener::IsValidDropData(nsIDOMDragEvent* aEvent)
{
nsCOMPtr<nsIDOMDataTransfer> dataTransfer;
aEvent->GetDataTransfer(getter_AddRefs(dataTransfer));
NS_ENSURE_TRUE(dataTransfer, false);
nsCOMPtr<nsIDOMDOMStringList> types;
dataTransfer->GetTypes(getter_AddRefs(types));
NS_ENSURE_TRUE(types, false);
// We only support dropping files onto a file upload control
bool typeSupported;
types->Contains(NS_LITERAL_STRING("Files"), &typeSupported);
return typeSupported;
}
nscoord
nsFileControlFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_MIN_WIDTH(this, result);
// Our min width is our pref width
result = GetPrefWidth(aRenderingContext);
return result;
}
nsTextControlFrame*
nsFileControlFrame::GetTextControlFrame()
{
nsITextControlFrame* tc = do_QueryFrame(mTextContent->GetPrimaryFrame());
return static_cast<nsTextControlFrame*>(tc);
}
PRIntn
nsFileControlFrame::GetSkipSides() const
{
return 0;
}
void
nsFileControlFrame::SyncAttr(PRInt32 aNameSpaceID, nsIAtom* aAttribute,
PRInt32 aWhichControls)
{
nsAutoString value;
if (mContent->GetAttr(aNameSpaceID, aAttribute, value)) {
if (aWhichControls & SYNC_TEXT && mTextContent) {
mTextContent->SetAttr(aNameSpaceID, aAttribute, value, true);
}
if (aWhichControls & SYNC_BUTTON && mBrowse) {
mBrowse->SetAttr(aNameSpaceID, aAttribute, value, true);
}
} else {
if (aWhichControls & SYNC_TEXT && mTextContent) {
mTextContent->UnsetAttr(aNameSpaceID, aAttribute, true);
}
if (aWhichControls & SYNC_BUTTON && mBrowse) {
mBrowse->UnsetAttr(aNameSpaceID, aAttribute, true);
}
}
}
void
nsFileControlFrame::SyncDisabledState()
{
nsEventStates eventStates = mContent->AsElement()->State();
if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
mTextContent->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
true);
mBrowse->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
true);
} else {
mTextContent->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
mBrowse->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
}
}
NS_IMETHODIMP
nsFileControlFrame::AttributeChanged(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
if (aNameSpaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::size) {
SyncAttr(aNameSpaceID, aAttribute, SYNC_TEXT);
} else if (aAttribute == nsGkAtoms::tabindex) {
SyncAttr(aNameSpaceID, aAttribute, SYNC_BUTTON);
}
}
return nsBlockFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
void
nsFileControlFrame::ContentStatesChanged(nsEventStates aStates)
{
if (aStates.HasState(NS_EVENT_STATE_DISABLED)) {
nsContentUtils::AddScriptRunner(new SyncDisabledStateEvent(this));
}
}
bool
nsFileControlFrame::IsLeaf() const
{
return true;
}
#ifdef NS_DEBUG
NS_IMETHODIMP
nsFileControlFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("FileControl"), aResult);
}
#endif
nsresult
nsFileControlFrame::SetFormProperty(nsIAtom* aName,
const nsAString& aValue)
{
if (nsGkAtoms::value == aName) {
nsCOMPtr<nsIDOMHTMLInputElement> textControl =
do_QueryInterface(mTextContent);
NS_ASSERTION(textControl,
"The text control should exist and be an input element");
textControl->SetValue(aValue);
}
return NS_OK;
}
nsresult
nsFileControlFrame::GetFormProperty(nsIAtom* aName, nsAString& aValue) const
{
aValue.Truncate(); // initialize out param
if (nsGkAtoms::value == aName) {
nsHTMLInputElement* inputElement =
nsHTMLInputElement::FromContent(mContent);
if (inputElement) {
inputElement->GetDisplayFileName(aValue);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsFileControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
// box-shadow
if (GetStyleBorder()->mBoxShadow) {
nsresult rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
nsDisplayBoxShadowOuter(aBuilder, this));
NS_ENSURE_SUCCESS(rv, rv);
}
// Our background is inherited to the text input, and we don't really want to
// paint it or out padding and borders (which we never have anyway, per
// styles in forms.css) -- doing it just makes us look ugly in some cases and
// has no effect in others.
nsDisplayListCollection tempList;
nsresult rv = nsBlockFrame::BuildDisplayList(aBuilder, aDirtyRect, tempList);
if (NS_FAILED(rv))
return rv;
tempList.BorderBackground()->DeleteAll();
// Clip height only
nsRect clipRect(aBuilder->ToReferenceFrame(this), GetSize());
clipRect.width = GetVisualOverflowRect().XMost();
nscoord radii[8] = {0, 0, 0, 0, 0, 0, 0, 0};
rv = OverflowClip(aBuilder, tempList, aLists, clipRect, radii);
NS_ENSURE_SUCCESS(rv, rv);
// Disabled file controls don't pass mouse events to their children, so we
// put an invisible item in the display list above the children
// just to catch events
nsEventStates eventStates = mContent->AsElement()->State();
if (eventStates.HasState(NS_EVENT_STATE_DISABLED) && IsVisibleForPainting(aBuilder)) {
rv = aLists.Content()->AppendNewToTop(
new (aBuilder) nsDisplayEventReceiver(aBuilder, this));
if (NS_FAILED(rv))
return rv;
}
return DisplaySelectionOverlay(aBuilder, aLists.Content());
}
#ifdef ACCESSIBILITY
already_AddRefed<nsAccessible>
nsFileControlFrame::CreateAccessible()
{
// Accessible object exists just to hold onto its children, for later shutdown
nsAccessibilityService* accService = nsIPresShell::AccService();
if (!accService)
return nsnull;
return accService->CreateHTMLFileInputAccessible(mContent,
PresContext()->PresShell());
}
#endif
PRUint32
nsFileControlFrame::GetCaptureMode(const CaptureCallbackData& aData)
{
PRInt32 filters = nsHTMLInputElement::FromContent(mContent)->GetFilterFromAccept();
nsresult rv;
bool captureEnabled;
if (filters == nsIFilePicker::filterImages) {
rv = aData.picker->ModeMayBeAvailable(nsICapturePicker::MODE_STILL,
&captureEnabled);
NS_ENSURE_SUCCESS(rv, 0);
if (captureEnabled) {
return nsICapturePicker::MODE_STILL;
}
return 0;
}
if (filters == nsIFilePicker::filterAudio) {
rv = aData.picker->ModeMayBeAvailable(nsICapturePicker::MODE_AUDIO_CLIP,
&captureEnabled);
NS_ENSURE_SUCCESS(rv, 0);
if (captureEnabled) {
return nsICapturePicker::MODE_AUDIO_CLIP;
}
return 0;
}
if (filters == nsIFilePicker::filterVideo) {
rv = aData.picker->ModeMayBeAvailable(nsICapturePicker::MODE_VIDEO_CLIP,
&captureEnabled);
NS_ENSURE_SUCCESS(rv, 0);
if (captureEnabled) {
return nsICapturePicker::MODE_VIDEO_CLIP;
}
rv = aData.picker->ModeMayBeAvailable(nsICapturePicker::MODE_VIDEO_NO_SOUND_CLIP,
&captureEnabled);
NS_ENSURE_SUCCESS(rv, 0);
if (captureEnabled) {
return nsICapturePicker::MODE_VIDEO_NO_SOUND_CLIP;
}
return 0;
}
return 0;
}
////////////////////////////////////////////////////////////
// Mouse listener implementation
NS_IMPL_ISUPPORTS1(nsFileControlFrame::MouseListener,
nsIDOMEventListener)
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