gecko/layout/forms/nsFileControlFrame.cpp

381 lines
12 KiB
C++

/* -*- 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 "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 "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 "nsIFile.h"
#include "nsHTMLInputElement.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentUtils.h"
#include "nsDisplayList.h"
#include "nsEventListenerManager.h"
#include "nsInterfaceHashtable.h"
#include "nsURIHashKey.h"
#include "nsNetCID.h"
#include "nsWeakReference.h"
#include "nsIVariant.h"
#include "mozilla/Services.h"
#include "nsDirectoryServiceDefs.h"
#include "nsDOMFile.h"
#include "nsEventStates.h"
#include "nsTextControlFrame.h"
#include "nsIDOMDOMStringList.h"
#include "nsIDOMDragEvent.h"
#include "nsContentList.h"
#include "nsIDOMMutationEvent.h"
using namespace mozilla;
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,
nsIFrame* 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(&mBrowse);
mMouseListener->ForgetFrame();
nsBlockFrame::DestroyFrom(aDestructRoot);
}
nsresult
nsFileControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
{
nsCOMPtr<nsIDocument> doc = mContent->GetDocument();
nsCOMPtr<nsINodeInfo> nodeInfo;
// Create and setup the file picking button.
nodeInfo = doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::input, nullptr,
kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
NS_NewHTMLElement(getter_AddRefs(mBrowse), nodeInfo.forget(),
dom::NOT_FROM_PARSER);
// NOTE: SetNativeAnonymous() has to be called before setting any attribute.
mBrowse->SetNativeAnonymous();
mBrowse->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
NS_LITERAL_STRING("button"), false);
// Set the file picking button text depending on the current locale.
nsXPIDLString buttonValue;
nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES,
"Browse", buttonValue);
mBrowse->SetAttr(kNameSpaceID_None, nsGkAtoms::value, buttonValue, false);
// Make sure access key and tab order for the element actually redirect to the
// file picking button.
nsCOMPtr<nsIDOMHTMLInputElement> fileContent = do_QueryInterface(mContent);
nsCOMPtr<nsIDOMHTMLInputElement> browseControl = do_QueryInterface(mBrowse);
nsAutoString accessKey;
fileContent->GetAccessKey(accessKey);
browseControl->SetAccessKey(accessKey);
int32_t tabIndex;
fileContent->GetTabIndex(&tabIndex);
browseControl->SetTabIndex(tabIndex);
if (!aElements.AppendElement(mBrowse)) {
return NS_ERROR_OUT_OF_MEMORY;
}
// Create and setup the text showing the selected files.
nodeInfo = doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::label, nullptr,
kNameSpaceID_XUL,
nsIDOMNode::ELEMENT_NODE);
NS_TrustedNewXULElement(getter_AddRefs(mTextContent), nodeInfo.forget());
// NOTE: SetNativeAnonymous() has to be called before setting any attribute.
mTextContent->SetNativeAnonymous();
mTextContent->SetAttr(kNameSpaceID_None, nsGkAtoms::crop,
NS_LITERAL_STRING("center"), false);
// Update the displayed text to reflect the current element's value.
nsAutoString value;
nsHTMLInputElement::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(nsBaseContentList& aElements,
uint32_t aFilter)
{
aElements.MaybeAppendElement(mBrowse);
aElements.MaybeAppendElement(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->GetPreventDefault(&defaultPrevented);
if (defaultPrevented) {
return NS_OK;
}
nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent);
if (!dragEvent || !IsValidDropData(dragEvent)) {
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();
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);
nsContentUtils::DispatchTrustedEvent(content->OwnerDoc(), content,
NS_LITERAL_STRING("change"), true,
false);
}
return NS_OK;
}
/* static */ bool
nsFileControlFrame::DnDListener::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;
}
void
nsFileControlFrame::SyncDisabledState()
{
nsEventStates eventStates = mContent->AsElement()->State();
if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
mBrowse->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
true);
} else {
mBrowse->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
}
}
NS_IMETHODIMP
nsFileControlFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::tabindex) {
if (aModType == nsIDOMMutationEvent::REMOVAL) {
mBrowse->UnsetAttr(aNameSpaceID, aAttribute, true);
} else {
nsAutoString value;
mContent->GetAttr(aNameSpaceID, aAttribute, value);
mBrowse->SetAttr(aNameSpaceID, aAttribute, value, true);
}
}
return nsBlockFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
void
nsFileControlFrame::ContentStatesChanged(nsEventStates aStates)
{
if (aStates.HasState(NS_EVENT_STATE_DISABLED)) {
nsContentUtils::AddScriptRunner(new SyncDisabledStateEvent(this));
}
}
#ifdef DEBUG
NS_IMETHODIMP
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)
{
// box-shadow
if (StyleBorder()->mBoxShadow) {
aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
nsDisplayBoxShadowOuter(aBuilder, this));
}
// 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;
nsBlockFrame::BuildDisplayList(aBuilder, aDirtyRect, tempList);
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};
OverflowClip(aBuilder, tempList, aLists, clipRect, radii);
// 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)) {
aLists.Content()->AppendNewToTop(
new (aBuilder) nsDisplayEventReceiver(aBuilder, this));
}
DisplaySelectionOverlay(aBuilder, aLists.Content());
}
#ifdef ACCESSIBILITY
a11y::AccType
nsFileControlFrame::AccessibleType()
{
return a11y::eHTMLFileInputType;
}
#endif
////////////////////////////////////////////////////////////
// Mouse listener implementation
NS_IMPL_ISUPPORTS1(nsFileControlFrame::MouseListener,
nsIDOMEventListener)