1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/forms/nsFileControlFrame.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,328 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsFileControlFrame.h"
1.10 +
1.11 +#include "nsGkAtoms.h"
1.12 +#include "nsCOMPtr.h"
1.13 +#include "nsIDocument.h"
1.14 +#include "nsINodeInfo.h"
1.15 +#include "mozilla/dom/Element.h"
1.16 +#include "mozilla/dom/DataTransfer.h"
1.17 +#include "mozilla/dom/HTMLButtonElement.h"
1.18 +#include "mozilla/dom/HTMLInputElement.h"
1.19 +#include "nsNodeInfoManager.h"
1.20 +#include "nsContentCreatorFunctions.h"
1.21 +#include "nsContentUtils.h"
1.22 +#include "mozilla/EventStates.h"
1.23 +#include "mozilla/dom/DOMStringList.h"
1.24 +#include "nsIDOMDragEvent.h"
1.25 +#include "nsIDOMFileList.h"
1.26 +#include "nsContentList.h"
1.27 +#include "nsIDOMMutationEvent.h"
1.28 +#include "nsTextNode.h"
1.29 +
1.30 +using namespace mozilla;
1.31 +using namespace mozilla::dom;
1.32 +
1.33 +nsIFrame*
1.34 +NS_NewFileControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
1.35 +{
1.36 + return new (aPresShell) nsFileControlFrame(aContext);
1.37 +}
1.38 +
1.39 +NS_IMPL_FRAMEARENA_HELPERS(nsFileControlFrame)
1.40 +
1.41 +nsFileControlFrame::nsFileControlFrame(nsStyleContext* aContext)
1.42 + : nsBlockFrame(aContext)
1.43 +{
1.44 + AddStateBits(NS_BLOCK_FLOAT_MGR);
1.45 +}
1.46 +
1.47 +
1.48 +void
1.49 +nsFileControlFrame::Init(nsIContent* aContent,
1.50 + nsIFrame* aParent,
1.51 + nsIFrame* aPrevInFlow)
1.52 +{
1.53 + nsBlockFrame::Init(aContent, aParent, aPrevInFlow);
1.54 +
1.55 + mMouseListener = new DnDListener(this);
1.56 +}
1.57 +
1.58 +void
1.59 +nsFileControlFrame::DestroyFrom(nsIFrame* aDestructRoot)
1.60 +{
1.61 + ENSURE_TRUE(mContent);
1.62 +
1.63 + // Remove the events.
1.64 + if (mContent) {
1.65 + mContent->RemoveSystemEventListener(NS_LITERAL_STRING("drop"),
1.66 + mMouseListener, false);
1.67 + mContent->RemoveSystemEventListener(NS_LITERAL_STRING("dragover"),
1.68 + mMouseListener, false);
1.69 + }
1.70 +
1.71 + nsContentUtils::DestroyAnonymousContent(&mTextContent);
1.72 + nsContentUtils::DestroyAnonymousContent(&mBrowse);
1.73 +
1.74 + mMouseListener->ForgetFrame();
1.75 + nsBlockFrame::DestroyFrom(aDestructRoot);
1.76 +}
1.77 +
1.78 +nsresult
1.79 +nsFileControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
1.80 +{
1.81 + nsCOMPtr<nsIDocument> doc = mContent->GetDocument();
1.82 +
1.83 + // Create and setup the file picking button.
1.84 + mBrowse = doc->CreateHTMLElement(nsGkAtoms::button);
1.85 + // NOTE: SetIsNativeAnonymousRoot() has to be called before setting any
1.86 + // attribute.
1.87 + mBrowse->SetIsNativeAnonymousRoot();
1.88 + mBrowse->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
1.89 + NS_LITERAL_STRING("button"), false);
1.90 +
1.91 + // Set the file picking button text depending on the current locale.
1.92 + nsXPIDLString buttonTxt;
1.93 + nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES,
1.94 + "Browse", buttonTxt);
1.95 +
1.96 + // Set the browse button text. It's a bit of a pain to do because we want to
1.97 + // make sure we are not notifying.
1.98 + nsRefPtr<nsTextNode> textContent =
1.99 + new nsTextNode(mBrowse->NodeInfo()->NodeInfoManager());
1.100 +
1.101 + textContent->SetText(buttonTxt, false);
1.102 +
1.103 + nsresult rv = mBrowse->AppendChildTo(textContent, false);
1.104 + NS_ENSURE_SUCCESS(rv, rv);
1.105 +
1.106 + // Make sure access key and tab order for the element actually redirect to the
1.107 + // file picking button.
1.108 + nsRefPtr<HTMLInputElement> fileContent = HTMLInputElement::FromContentOrNull(mContent);
1.109 + nsRefPtr<HTMLButtonElement> browseControl = HTMLButtonElement::FromContentOrNull(mBrowse);
1.110 +
1.111 + nsAutoString accessKey;
1.112 + fileContent->GetAccessKey(accessKey);
1.113 + browseControl->SetAccessKey(accessKey);
1.114 +
1.115 + int32_t tabIndex;
1.116 + fileContent->GetTabIndex(&tabIndex);
1.117 + browseControl->SetTabIndex(tabIndex);
1.118 +
1.119 + if (!aElements.AppendElement(mBrowse)) {
1.120 + return NS_ERROR_OUT_OF_MEMORY;
1.121 + }
1.122 +
1.123 + // Create and setup the text showing the selected files.
1.124 + nsCOMPtr<nsINodeInfo> nodeInfo;
1.125 + nodeInfo = doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::label, nullptr,
1.126 + kNameSpaceID_XUL,
1.127 + nsIDOMNode::ELEMENT_NODE);
1.128 + NS_TrustedNewXULElement(getter_AddRefs(mTextContent), nodeInfo.forget());
1.129 + // NOTE: SetIsNativeAnonymousRoot() has to be called before setting any
1.130 + // attribute.
1.131 + mTextContent->SetIsNativeAnonymousRoot();
1.132 + mTextContent->SetAttr(kNameSpaceID_None, nsGkAtoms::crop,
1.133 + NS_LITERAL_STRING("center"), false);
1.134 +
1.135 + // Update the displayed text to reflect the current element's value.
1.136 + nsAutoString value;
1.137 + HTMLInputElement::FromContent(mContent)->GetDisplayFileName(value);
1.138 + UpdateDisplayedValue(value, false);
1.139 +
1.140 + if (!aElements.AppendElement(mTextContent)) {
1.141 + return NS_ERROR_OUT_OF_MEMORY;
1.142 + }
1.143 +
1.144 + // We should be able to interact with the element by doing drag and drop.
1.145 + mContent->AddSystemEventListener(NS_LITERAL_STRING("drop"),
1.146 + mMouseListener, false);
1.147 + mContent->AddSystemEventListener(NS_LITERAL_STRING("dragover"),
1.148 + mMouseListener, false);
1.149 +
1.150 + SyncDisabledState();
1.151 +
1.152 + return NS_OK;
1.153 +}
1.154 +
1.155 +void
1.156 +nsFileControlFrame::AppendAnonymousContentTo(nsBaseContentList& aElements,
1.157 + uint32_t aFilter)
1.158 +{
1.159 + aElements.MaybeAppendElement(mBrowse);
1.160 + aElements.MaybeAppendElement(mTextContent);
1.161 +}
1.162 +
1.163 +NS_QUERYFRAME_HEAD(nsFileControlFrame)
1.164 + NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
1.165 + NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
1.166 +NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
1.167 +
1.168 +void
1.169 +nsFileControlFrame::SetFocus(bool aOn, bool aRepaint)
1.170 +{
1.171 +}
1.172 +
1.173 +/**
1.174 + * This is called when we receive a drop or a dragover.
1.175 + */
1.176 +NS_IMETHODIMP
1.177 +nsFileControlFrame::DnDListener::HandleEvent(nsIDOMEvent* aEvent)
1.178 +{
1.179 + NS_ASSERTION(mFrame, "We should have been unregistered");
1.180 +
1.181 + bool defaultPrevented = false;
1.182 + aEvent->GetDefaultPrevented(&defaultPrevented);
1.183 + if (defaultPrevented) {
1.184 + return NS_OK;
1.185 + }
1.186 +
1.187 + nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent);
1.188 + if (!dragEvent || !IsValidDropData(dragEvent)) {
1.189 + return NS_OK;
1.190 + }
1.191 +
1.192 + nsAutoString eventType;
1.193 + aEvent->GetType(eventType);
1.194 + if (eventType.EqualsLiteral("dragover")) {
1.195 + // Prevent default if we can accept this drag data
1.196 + aEvent->PreventDefault();
1.197 + return NS_OK;
1.198 + }
1.199 +
1.200 + if (eventType.EqualsLiteral("drop")) {
1.201 + aEvent->StopPropagation();
1.202 + aEvent->PreventDefault();
1.203 +
1.204 + nsIContent* content = mFrame->GetContent();
1.205 + NS_ASSERTION(content, "The frame has no content???");
1.206 +
1.207 + HTMLInputElement* inputElement = HTMLInputElement::FromContent(content);
1.208 + NS_ASSERTION(inputElement, "No input element for this file upload control frame!");
1.209 +
1.210 + nsCOMPtr<nsIDOMDataTransfer> dataTransfer;
1.211 + dragEvent->GetDataTransfer(getter_AddRefs(dataTransfer));
1.212 +
1.213 + nsCOMPtr<nsIDOMFileList> fileList;
1.214 + dataTransfer->GetFiles(getter_AddRefs(fileList));
1.215 +
1.216 + inputElement->SetFiles(fileList, true);
1.217 + nsContentUtils::DispatchTrustedEvent(content->OwnerDoc(), content,
1.218 + NS_LITERAL_STRING("change"), true,
1.219 + false);
1.220 + }
1.221 +
1.222 + return NS_OK;
1.223 +}
1.224 +
1.225 +/* static */ bool
1.226 +nsFileControlFrame::DnDListener::IsValidDropData(nsIDOMDragEvent* aEvent)
1.227 +{
1.228 + nsCOMPtr<nsIDOMDataTransfer> domDataTransfer;
1.229 + aEvent->GetDataTransfer(getter_AddRefs(domDataTransfer));
1.230 + nsCOMPtr<DataTransfer> dataTransfer = do_QueryInterface(domDataTransfer);
1.231 + NS_ENSURE_TRUE(dataTransfer, false);
1.232 +
1.233 + // We only support dropping files onto a file upload control
1.234 + nsRefPtr<DOMStringList> types = dataTransfer->Types();
1.235 + return types->Contains(NS_LITERAL_STRING("Files"));
1.236 +}
1.237 +
1.238 +nscoord
1.239 +nsFileControlFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
1.240 +{
1.241 + nscoord result;
1.242 + DISPLAY_MIN_WIDTH(this, result);
1.243 +
1.244 + // Our min width is our pref width
1.245 + result = GetPrefWidth(aRenderingContext);
1.246 + return result;
1.247 +}
1.248 +
1.249 +void
1.250 +nsFileControlFrame::SyncDisabledState()
1.251 +{
1.252 + EventStates eventStates = mContent->AsElement()->State();
1.253 + if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
1.254 + mBrowse->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
1.255 + true);
1.256 + } else {
1.257 + mBrowse->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
1.258 + }
1.259 +}
1.260 +
1.261 +nsresult
1.262 +nsFileControlFrame::AttributeChanged(int32_t aNameSpaceID,
1.263 + nsIAtom* aAttribute,
1.264 + int32_t aModType)
1.265 +{
1.266 + if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::tabindex) {
1.267 + if (aModType == nsIDOMMutationEvent::REMOVAL) {
1.268 + mBrowse->UnsetAttr(aNameSpaceID, aAttribute, true);
1.269 + } else {
1.270 + nsAutoString value;
1.271 + mContent->GetAttr(aNameSpaceID, aAttribute, value);
1.272 + mBrowse->SetAttr(aNameSpaceID, aAttribute, value, true);
1.273 + }
1.274 + }
1.275 +
1.276 + return nsBlockFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
1.277 +}
1.278 +
1.279 +void
1.280 +nsFileControlFrame::ContentStatesChanged(EventStates aStates)
1.281 +{
1.282 + if (aStates.HasState(NS_EVENT_STATE_DISABLED)) {
1.283 + nsContentUtils::AddScriptRunner(new SyncDisabledStateEvent(this));
1.284 + }
1.285 +}
1.286 +
1.287 +#ifdef DEBUG_FRAME_DUMP
1.288 +nsresult
1.289 +nsFileControlFrame::GetFrameName(nsAString& aResult) const
1.290 +{
1.291 + return MakeFrameName(NS_LITERAL_STRING("FileControl"), aResult);
1.292 +}
1.293 +#endif
1.294 +
1.295 +void
1.296 +nsFileControlFrame::UpdateDisplayedValue(const nsAString& aValue, bool aNotify)
1.297 +{
1.298 + mTextContent->SetAttr(kNameSpaceID_None, nsGkAtoms::value, aValue, aNotify);
1.299 +}
1.300 +
1.301 +nsresult
1.302 +nsFileControlFrame::SetFormProperty(nsIAtom* aName,
1.303 + const nsAString& aValue)
1.304 +{
1.305 + if (nsGkAtoms::value == aName) {
1.306 + UpdateDisplayedValue(aValue, true);
1.307 + }
1.308 + return NS_OK;
1.309 +}
1.310 +
1.311 +void
1.312 +nsFileControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
1.313 + const nsRect& aDirtyRect,
1.314 + const nsDisplayListSet& aLists)
1.315 +{
1.316 + BuildDisplayListForInline(aBuilder, aDirtyRect, aLists);
1.317 +}
1.318 +
1.319 +#ifdef ACCESSIBILITY
1.320 +a11y::AccType
1.321 +nsFileControlFrame::AccessibleType()
1.322 +{
1.323 + return a11y::eHTMLFileInputType;
1.324 +}
1.325 +#endif
1.326 +
1.327 +////////////////////////////////////////////////////////////
1.328 +// Mouse listener implementation
1.329 +
1.330 +NS_IMPL_ISUPPORTS(nsFileControlFrame::MouseListener,
1.331 + nsIDOMEventListener)
