mirror of
https://github.com/mozilla/gecko-dev.git
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425 lines
13 KiB
C++
425 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsFileControlFrame.h"
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#include "nsGkAtoms.h"
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#include "nsCOMPtr.h"
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#include "nsIDocument.h"
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#include "mozilla/dom/NodeInfo.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/DataTransfer.h"
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#include "mozilla/dom/HTMLButtonElement.h"
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#include "mozilla/dom/HTMLInputElement.h"
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#include "mozilla/Preferences.h"
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#include "nsNodeInfoManager.h"
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#include "nsContentCreatorFunctions.h"
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#include "nsContentUtils.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/dom/DOMStringList.h"
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#include "nsIDOMDragEvent.h"
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#include "nsIDOMFileList.h"
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#include "nsContentList.h"
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#include "nsIDOMMutationEvent.h"
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#include "nsTextNode.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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nsIFrame*
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NS_NewFileControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsFileControlFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsFileControlFrame)
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nsFileControlFrame::nsFileControlFrame(nsStyleContext* aContext)
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: nsBlockFrame(aContext)
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{
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AddStateBits(NS_BLOCK_FLOAT_MGR);
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}
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void
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nsFileControlFrame::Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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nsBlockFrame::Init(aContent, aParent, aPrevInFlow);
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mMouseListener = new DnDListener(this);
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}
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void
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nsFileControlFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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ENSURE_TRUE(mContent);
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// Remove the events.
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if (mContent) {
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mContent->RemoveSystemEventListener(NS_LITERAL_STRING("drop"),
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mMouseListener, false);
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mContent->RemoveSystemEventListener(NS_LITERAL_STRING("dragover"),
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mMouseListener, false);
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}
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nsContentUtils::DestroyAnonymousContent(&mTextContent);
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nsContentUtils::DestroyAnonymousContent(&mBrowseDirs);
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nsContentUtils::DestroyAnonymousContent(&mBrowseFiles);
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mMouseListener->ForgetFrame();
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nsBlockFrame::DestroyFrom(aDestructRoot);
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}
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static already_AddRefed<Element>
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MakeAnonButton(nsIDocument* aDoc, const char* labelKey,
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HTMLInputElement* aInputElement,
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const nsAString& aAccessKey)
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{
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RefPtr<Element> button = aDoc->CreateHTMLElement(nsGkAtoms::button);
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// NOTE: SetIsNativeAnonymousRoot() has to be called before setting any
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// attribute.
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button->SetIsNativeAnonymousRoot();
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button->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
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NS_LITERAL_STRING("button"), false);
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// Set the file picking button text depending on the current locale.
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nsXPIDLString buttonTxt;
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nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES,
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labelKey, buttonTxt);
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// Set the browse button text. It's a bit of a pain to do because we want to
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// make sure we are not notifying.
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RefPtr<nsTextNode> textContent =
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new nsTextNode(button->NodeInfo()->NodeInfoManager());
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textContent->SetText(buttonTxt, false);
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nsresult rv = button->AppendChildTo(textContent, false);
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if (NS_FAILED(rv)) {
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return nullptr;
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}
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// Make sure access key and tab order for the element actually redirect to the
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// file picking button.
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RefPtr<HTMLButtonElement> buttonElement =
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HTMLButtonElement::FromContentOrNull(button);
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if (!aAccessKey.IsEmpty()) {
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buttonElement->SetAccessKey(aAccessKey);
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}
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// Both elements are given the same tab index so that the user can tab
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// to the file control at the correct index, and then between the two
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// buttons.
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int32_t tabIndex;
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aInputElement->GetTabIndex(&tabIndex);
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buttonElement->SetTabIndex(tabIndex);
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return button.forget();
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}
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nsresult
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nsFileControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
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{
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nsCOMPtr<nsIDocument> doc = mContent->GetComposedDoc();
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#if defined(ANDROID) || defined(MOZ_B2G)
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bool isDirPicker = false;
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#else
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nsIContent* content = GetContent();
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bool isDirPicker =
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Preferences::GetBool("dom.input.dirpicker", false) &&
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content && content->HasAttr(kNameSpaceID_None, nsGkAtoms::directory);
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#endif
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RefPtr<HTMLInputElement> fileContent = HTMLInputElement::FromContentOrNull(mContent);
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// The access key is transferred to the "Choose files..." button only. In
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// effect that access key allows access to the control via that button, then
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// the user can tab between the two buttons.
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nsAutoString accessKey;
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fileContent->GetAccessKey(accessKey);
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mBrowseFiles = MakeAnonButton(doc, isDirPicker ? "ChooseFiles" : "Browse",
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fileContent, accessKey);
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if (!mBrowseFiles || !aElements.AppendElement(mBrowseFiles)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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if (isDirPicker) {
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mBrowseDirs = MakeAnonButton(doc, "ChooseDirs", fileContent, EmptyString());
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// Setting the 'directory' attribute is simply a means of allowing our
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// event handling code in HTMLInputElement.cpp to distinguish between a
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// click on the "Choose files" button from the "Choose a folder" button.
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if (!mBrowseDirs) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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mBrowseDirs->SetAttr(kNameSpaceID_None, nsGkAtoms::directory,
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EmptyString(), false);
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if (!aElements.AppendElement(mBrowseDirs)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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// Create and setup the text showing the selected files.
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RefPtr<NodeInfo> nodeInfo;
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nodeInfo = doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::label, nullptr,
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kNameSpaceID_XUL,
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nsIDOMNode::ELEMENT_NODE);
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NS_TrustedNewXULElement(getter_AddRefs(mTextContent), nodeInfo.forget());
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// NOTE: SetIsNativeAnonymousRoot() has to be called before setting any
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// attribute.
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mTextContent->SetIsNativeAnonymousRoot();
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mTextContent->SetAttr(kNameSpaceID_None, nsGkAtoms::crop,
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NS_LITERAL_STRING("center"), false);
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// Update the displayed text to reflect the current element's value.
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nsAutoString value;
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HTMLInputElement::FromContent(mContent)->GetDisplayFileName(value);
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UpdateDisplayedValue(value, false);
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if (!aElements.AppendElement(mTextContent)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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// We should be able to interact with the element by doing drag and drop.
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mContent->AddSystemEventListener(NS_LITERAL_STRING("drop"),
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mMouseListener, false);
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mContent->AddSystemEventListener(NS_LITERAL_STRING("dragover"),
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mMouseListener, false);
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SyncDisabledState();
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return NS_OK;
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}
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void
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nsFileControlFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
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uint32_t aFilter)
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{
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if (mBrowseFiles) {
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aElements.AppendElement(mBrowseFiles);
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}
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if (mBrowseDirs) {
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aElements.AppendElement(mBrowseDirs);
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}
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if (mTextContent) {
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aElements.AppendElement(mTextContent);
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}
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}
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NS_QUERYFRAME_HEAD(nsFileControlFrame)
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NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
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NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
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void
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nsFileControlFrame::SetFocus(bool aOn, bool aRepaint)
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{
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}
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/**
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* This is called when we receive a drop or a dragover.
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*/
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NS_IMETHODIMP
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nsFileControlFrame::DnDListener::HandleEvent(nsIDOMEvent* aEvent)
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{
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NS_ASSERTION(mFrame, "We should have been unregistered");
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bool defaultPrevented = false;
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aEvent->GetDefaultPrevented(&defaultPrevented);
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if (defaultPrevented) {
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return NS_OK;
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}
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nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent);
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if (!dragEvent) {
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return NS_OK;
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}
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nsCOMPtr<nsIDOMDataTransfer> dataTransfer;
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dragEvent->GetDataTransfer(getter_AddRefs(dataTransfer));
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if (!IsValidDropData(dataTransfer)) {
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return NS_OK;
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}
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nsIContent* content = mFrame->GetContent();
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bool supportsMultiple = content && content->HasAttr(kNameSpaceID_None, nsGkAtoms::multiple);
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if (!CanDropTheseFiles(dataTransfer, supportsMultiple)) {
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dataTransfer->SetDropEffect(NS_LITERAL_STRING("none"));
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aEvent->StopPropagation();
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return NS_OK;
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}
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nsAutoString eventType;
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aEvent->GetType(eventType);
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if (eventType.EqualsLiteral("dragover")) {
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// Prevent default if we can accept this drag data
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aEvent->PreventDefault();
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return NS_OK;
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}
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if (eventType.EqualsLiteral("drop")) {
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aEvent->StopPropagation();
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aEvent->PreventDefault();
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NS_ASSERTION(content, "The frame has no content???");
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HTMLInputElement* inputElement = HTMLInputElement::FromContent(content);
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NS_ASSERTION(inputElement, "No input element for this file upload control frame!");
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nsCOMPtr<nsIDOMFileList> fileList;
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dataTransfer->GetFiles(getter_AddRefs(fileList));
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inputElement->SetFiles(fileList, true);
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nsContentUtils::DispatchTrustedEvent(content->OwnerDoc(), content,
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NS_LITERAL_STRING("change"), true,
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false);
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}
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return NS_OK;
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}
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/* static */ bool
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nsFileControlFrame::DnDListener::IsValidDropData(nsIDOMDataTransfer* aDOMDataTransfer)
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{
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nsCOMPtr<DataTransfer> dataTransfer = do_QueryInterface(aDOMDataTransfer);
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NS_ENSURE_TRUE(dataTransfer, false);
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// We only support dropping files onto a file upload control
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RefPtr<DOMStringList> types = dataTransfer->Types();
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return types->Contains(NS_LITERAL_STRING("Files"));
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}
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/* static */ bool
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nsFileControlFrame::DnDListener::CanDropTheseFiles(nsIDOMDataTransfer* aDOMDataTransfer,
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bool aSupportsMultiple)
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{
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nsCOMPtr<DataTransfer> dataTransfer = do_QueryInterface(aDOMDataTransfer);
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NS_ENSURE_TRUE(dataTransfer, false);
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nsCOMPtr<nsIDOMFileList> fileList;
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dataTransfer->GetFiles(getter_AddRefs(fileList));
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uint32_t listLength = 0;
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if (fileList) {
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fileList->GetLength(&listLength);
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}
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return listLength <= 1 || aSupportsMultiple;
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}
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nscoord
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nsFileControlFrame::GetMinISize(nsRenderingContext *aRenderingContext)
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{
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nscoord result;
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DISPLAY_MIN_WIDTH(this, result);
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// Our min width is our pref width
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result = GetPrefISize(aRenderingContext);
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return result;
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}
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void
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nsFileControlFrame::SyncDisabledState()
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{
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EventStates eventStates = mContent->AsElement()->State();
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if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
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mBrowseFiles->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
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true);
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if (mBrowseDirs) {
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mBrowseDirs->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
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true);
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}
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} else {
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mBrowseFiles->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
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if (mBrowseDirs) {
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mBrowseDirs->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
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}
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}
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}
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nsresult
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nsFileControlFrame::AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType)
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{
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if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::tabindex) {
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if (aModType == nsIDOMMutationEvent::REMOVAL) {
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mBrowseFiles->UnsetAttr(aNameSpaceID, aAttribute, true);
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if (mBrowseDirs) {
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mBrowseDirs->UnsetAttr(aNameSpaceID, aAttribute, true);
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}
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} else {
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nsAutoString value;
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mContent->GetAttr(aNameSpaceID, aAttribute, value);
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mBrowseFiles->SetAttr(aNameSpaceID, aAttribute, value, true);
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if (mBrowseDirs) {
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mBrowseDirs->SetAttr(aNameSpaceID, aAttribute, value, true);
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}
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}
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}
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return nsBlockFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
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}
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void
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nsFileControlFrame::ContentStatesChanged(EventStates aStates)
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{
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if (aStates.HasState(NS_EVENT_STATE_DISABLED)) {
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nsContentUtils::AddScriptRunner(new SyncDisabledStateEvent(this));
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}
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}
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#ifdef DEBUG_FRAME_DUMP
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nsresult
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nsFileControlFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("FileControl"), aResult);
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}
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#endif
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void
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nsFileControlFrame::UpdateDisplayedValue(const nsAString& aValue, bool aNotify)
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{
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mTextContent->SetAttr(kNameSpaceID_None, nsGkAtoms::value, aValue, aNotify);
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}
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nsresult
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nsFileControlFrame::SetFormProperty(nsIAtom* aName,
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const nsAString& aValue)
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{
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if (nsGkAtoms::value == aName) {
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UpdateDisplayedValue(aValue, true);
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}
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return NS_OK;
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}
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void
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nsFileControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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BuildDisplayListForInline(aBuilder, aDirtyRect, aLists);
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}
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#ifdef ACCESSIBILITY
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a11y::AccType
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nsFileControlFrame::AccessibleType()
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{
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return a11y::eHTMLFileInputType;
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}
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#endif
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////////////////////////////////////////////////////////////
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// Mouse listener implementation
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NS_IMPL_ISUPPORTS(nsFileControlFrame::MouseListener,
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nsIDOMEventListener)
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