329 lines
9.4 KiB
C++
329 lines
9.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "nsContextMenuInfo.h"
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#include "nsIImageLoadingContent.h"
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#include "imgLoader.h"
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#include "nsIDOMDocument.h"
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#include "nsIDOMHTMLDocument.h"
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#include "nsIDOMHTMLElement.h"
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#include "nsIDOMHTMLHtmlElement.h"
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#include "nsIDOMHTMLAnchorElement.h"
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#include "nsIDOMHTMLImageElement.h"
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#include "nsIDOMHTMLAreaElement.h"
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#include "nsIDOMHTMLLinkElement.h"
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#include "nsIDOMWindow.h"
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#include "nsICSSDeclaration.h"
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#include "nsIDOMCSSValue.h"
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#include "nsIDOMCSSPrimitiveValue.h"
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#include "nsNetUtil.h"
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#include "nsUnicharUtils.h"
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#include "nsIDocument.h"
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#include "nsIPrincipal.h"
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#include "nsIContentSecurityPolicy.h"
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#include "nsIContentPolicy.h"
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#include "nsAutoPtr.h"
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#include "imgRequestProxy.h"
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using mozilla::dom::Element;
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using mozilla::ErrorResult;
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NS_IMPL_ISUPPORTS(nsContextMenuInfo, nsIContextMenuInfo)
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nsContextMenuInfo::nsContextMenuInfo()
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{
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}
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nsContextMenuInfo::~nsContextMenuInfo()
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{
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}
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NS_IMETHODIMP
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nsContextMenuInfo::GetMouseEvent(nsIDOMEvent** aEvent)
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{
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NS_ENSURE_ARG_POINTER(aEvent);
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NS_IF_ADDREF(*aEvent = mMouseEvent);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsContextMenuInfo::GetTargetNode(nsIDOMNode** aNode)
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{
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NS_ENSURE_ARG_POINTER(aNode);
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NS_IF_ADDREF(*aNode = mDOMNode);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsContextMenuInfo::GetAssociatedLink(nsAString& aHRef)
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{
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NS_ENSURE_STATE(mAssociatedLink);
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aHRef.Truncate(0);
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nsCOMPtr<nsIDOMElement> content(do_QueryInterface(mAssociatedLink));
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nsAutoString localName;
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if (content) {
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content->GetLocalName(localName);
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}
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nsCOMPtr<nsIDOMElement> linkContent;
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ToLowerCase(localName);
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if (localName.EqualsLiteral("a") ||
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localName.EqualsLiteral("area") ||
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localName.EqualsLiteral("link")) {
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bool hasAttr;
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content->HasAttribute(NS_LITERAL_STRING("href"), &hasAttr);
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if (hasAttr) {
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linkContent = content;
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nsCOMPtr<nsIDOMHTMLAnchorElement> anchor(do_QueryInterface(linkContent));
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if (anchor) {
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anchor->GetHref(aHRef);
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} else {
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nsCOMPtr<nsIDOMHTMLAreaElement> area(do_QueryInterface(linkContent));
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if (area) {
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area->GetHref(aHRef);
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} else {
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nsCOMPtr<nsIDOMHTMLLinkElement> link(do_QueryInterface(linkContent));
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if (link) {
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link->GetHref(aHRef);
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}
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}
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}
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}
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} else {
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nsCOMPtr<nsIDOMNode> curr;
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mAssociatedLink->GetParentNode(getter_AddRefs(curr));
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while (curr) {
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content = do_QueryInterface(curr);
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if (!content) {
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break;
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}
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content->GetLocalName(localName);
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ToLowerCase(localName);
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if (localName.EqualsLiteral("a")) {
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bool hasAttr;
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content->HasAttribute(NS_LITERAL_STRING("href"), &hasAttr);
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if (hasAttr) {
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linkContent = content;
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nsCOMPtr<nsIDOMHTMLAnchorElement> anchor(
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do_QueryInterface(linkContent));
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if (anchor) {
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anchor->GetHref(aHRef);
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}
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} else {
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linkContent = nullptr; // Links can't be nested.
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}
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break;
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}
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nsCOMPtr<nsIDOMNode> temp = curr;
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temp->GetParentNode(getter_AddRefs(curr));
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsContextMenuInfo::GetImageContainer(imgIContainer** aImageContainer)
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{
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NS_ENSURE_ARG_POINTER(aImageContainer);
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NS_ENSURE_STATE(mDOMNode);
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nsCOMPtr<imgIRequest> request;
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GetImageRequest(mDOMNode, getter_AddRefs(request));
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if (request) {
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return request->GetImage(aImageContainer);
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}
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return NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsContextMenuInfo::GetImageSrc(nsIURI** aURI)
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{
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NS_ENSURE_ARG_POINTER(aURI);
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NS_ENSURE_STATE(mDOMNode);
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nsCOMPtr<nsIImageLoadingContent> content(do_QueryInterface(mDOMNode));
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NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
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return content->GetCurrentURI(aURI);
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}
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NS_IMETHODIMP
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nsContextMenuInfo::GetBackgroundImageContainer(imgIContainer** aImageContainer)
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{
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NS_ENSURE_ARG_POINTER(aImageContainer);
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NS_ENSURE_STATE(mDOMNode);
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RefPtr<imgRequestProxy> request;
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GetBackgroundImageRequest(mDOMNode, getter_AddRefs(request));
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if (request) {
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return request->GetImage(aImageContainer);
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}
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return NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsContextMenuInfo::GetBackgroundImageSrc(nsIURI** aURI)
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{
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NS_ENSURE_ARG_POINTER(aURI);
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NS_ENSURE_STATE(mDOMNode);
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RefPtr<imgRequestProxy> request;
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GetBackgroundImageRequest(mDOMNode, getter_AddRefs(request));
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if (request) {
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return request->GetURI(aURI);
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}
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return NS_ERROR_FAILURE;
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}
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nsresult
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nsContextMenuInfo::GetImageRequest(nsIDOMNode* aDOMNode, imgIRequest** aRequest)
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{
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NS_ENSURE_ARG(aDOMNode);
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NS_ENSURE_ARG_POINTER(aRequest);
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// Get content
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nsCOMPtr<nsIImageLoadingContent> content(do_QueryInterface(aDOMNode));
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NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
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return content->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, aRequest);
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}
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bool
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nsContextMenuInfo::HasBackgroundImage(nsIDOMNode* aDOMNode)
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{
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NS_ENSURE_TRUE(aDOMNode, false);
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RefPtr<imgRequestProxy> request;
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GetBackgroundImageRequest(aDOMNode, getter_AddRefs(request));
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return (request != nullptr);
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}
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nsresult
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nsContextMenuInfo::GetBackgroundImageRequest(nsIDOMNode* aDOMNode,
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imgRequestProxy** aRequest)
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{
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NS_ENSURE_ARG(aDOMNode);
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NS_ENSURE_ARG_POINTER(aRequest);
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nsCOMPtr<nsIDOMNode> domNode = aDOMNode;
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// special case for the <html> element: if it has no background-image
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// we'll defer to <body>
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nsCOMPtr<nsIDOMHTMLHtmlElement> htmlElement = do_QueryInterface(domNode);
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if (htmlElement) {
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nsCOMPtr<nsIDOMHTMLElement> element = do_QueryInterface(domNode);
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nsAutoString nameSpace;
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element->GetNamespaceURI(nameSpace);
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if (nameSpace.IsEmpty()) {
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nsresult rv = GetBackgroundImageRequestInternal(domNode, aRequest);
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if (NS_SUCCEEDED(rv) && *aRequest) {
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return NS_OK;
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}
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// no background-image found
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nsCOMPtr<nsIDOMDocument> document;
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domNode->GetOwnerDocument(getter_AddRefs(document));
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nsCOMPtr<nsIDOMHTMLDocument> htmlDocument(do_QueryInterface(document));
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NS_ENSURE_TRUE(htmlDocument, NS_ERROR_FAILURE);
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nsCOMPtr<nsIDOMHTMLElement> body;
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htmlDocument->GetBody(getter_AddRefs(body));
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domNode = do_QueryInterface(body);
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NS_ENSURE_TRUE(domNode, NS_ERROR_FAILURE);
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}
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}
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return GetBackgroundImageRequestInternal(domNode, aRequest);
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}
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nsresult
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nsContextMenuInfo::GetBackgroundImageRequestInternal(nsIDOMNode* aDOMNode,
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imgRequestProxy** aRequest)
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{
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NS_ENSURE_ARG_POINTER(aDOMNode);
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nsCOMPtr<nsIDOMNode> domNode = aDOMNode;
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nsCOMPtr<nsIDOMNode> parentNode;
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nsCOMPtr<nsIDOMDocument> document;
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domNode->GetOwnerDocument(getter_AddRefs(document));
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NS_ENSURE_TRUE(document, NS_ERROR_FAILURE);
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nsCOMPtr<nsIDOMWindow> window;
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document->GetDefaultView(getter_AddRefs(window));
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NS_ENSURE_TRUE(window, NS_ERROR_FAILURE);
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nsCOMPtr<nsPIDOMWindow> piWindow = do_QueryInterface(window);
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MOZ_ASSERT(piWindow);
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piWindow = piWindow->GetCurrentInnerWindow();
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MOZ_ASSERT(piWindow);
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nsCOMPtr<nsIDOMCSSPrimitiveValue> primitiveValue;
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nsAutoString bgStringValue;
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nsCOMPtr<nsIDocument> doc(do_QueryInterface(document));
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nsCOMPtr<nsIPrincipal> principal = doc ? doc->NodePrincipal() : nullptr;
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while (true) {
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nsCOMPtr<Element> domElement(do_QueryInterface(domNode));
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// bail for the parent node of the root element or null argument
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if (!domElement) {
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break;
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}
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ErrorResult dummy;
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nsCOMPtr<nsICSSDeclaration> computedStyle =
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piWindow->GetComputedStyle(*domElement, EmptyString(), dummy);
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dummy.SuppressException();
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if (computedStyle) {
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nsCOMPtr<nsIDOMCSSValue> cssValue;
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computedStyle->GetPropertyCSSValue(NS_LITERAL_STRING("background-image"),
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getter_AddRefs(cssValue));
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primitiveValue = do_QueryInterface(cssValue);
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if (primitiveValue) {
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primitiveValue->GetStringValue(bgStringValue);
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if (!bgStringValue.EqualsLiteral("none")) {
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nsCOMPtr<nsIURI> bgUri;
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NS_NewURI(getter_AddRefs(bgUri), bgStringValue);
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NS_ENSURE_TRUE(bgUri, NS_ERROR_FAILURE);
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RefPtr<imgLoader> il = imgLoader::GetInstance();
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NS_ENSURE_TRUE(il, NS_ERROR_FAILURE);
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return il->LoadImage(bgUri, nullptr, nullptr,
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doc->GetReferrerPolicy(), principal, nullptr,
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nullptr, nullptr, nsIRequest::LOAD_NORMAL,
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nullptr, nsIContentPolicy::TYPE_INTERNAL_IMAGE,
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EmptyString(), aRequest);
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}
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}
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// bail if we encounter non-transparent background-color
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computedStyle->GetPropertyCSSValue(NS_LITERAL_STRING("background-color"),
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getter_AddRefs(cssValue));
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primitiveValue = do_QueryInterface(cssValue);
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if (primitiveValue) {
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primitiveValue->GetStringValue(bgStringValue);
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if (!bgStringValue.EqualsLiteral("transparent")) {
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return NS_ERROR_FAILURE;
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}
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}
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}
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domNode->GetParentNode(getter_AddRefs(parentNode));
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domNode = parentNode;
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}
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return NS_ERROR_FAILURE;
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}
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