gecko-dev/embedding/browser/nsContextMenuInfo.cpp

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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 "nsContextMenuInfo.h"
#include "nsIImageLoadingContent.h"
#include "imgLoader.h"
#include "nsIDOMDocument.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIDOMHTMLElement.h"
#include "nsIDOMHTMLHtmlElement.h"
#include "nsIDOMHTMLAnchorElement.h"
#include "nsIDOMHTMLImageElement.h"
#include "nsIDOMHTMLAreaElement.h"
#include "nsIDOMHTMLLinkElement.h"
#include "nsIDOMWindow.h"
#include "nsIDOMCSSStyleDeclaration.h"
#include "nsIDOMCSSValue.h"
#include "nsIDOMCSSPrimitiveValue.h"
#include "nsNetUtil.h"
#include "nsUnicharUtils.h"
#include "nsIDocument.h"
#include "nsIPrincipal.h"
#include "nsIContentSecurityPolicy.h"
#include "nsIContentPolicy.h"
#include "nsAutoPtr.h"
#include "imgRequestProxy.h"
//*****************************************************************************
// class nsContextMenuInfo
//*****************************************************************************
NS_IMPL_ISUPPORTS(nsContextMenuInfo, nsIContextMenuInfo)
nsContextMenuInfo::nsContextMenuInfo()
{
}
nsContextMenuInfo::~nsContextMenuInfo()
{
}
/* readonly attribute nsIDOMEvent mouseEvent; */
NS_IMETHODIMP
nsContextMenuInfo::GetMouseEvent(nsIDOMEvent **aEvent)
{
NS_ENSURE_ARG_POINTER(aEvent);
NS_IF_ADDREF(*aEvent = mMouseEvent);
return NS_OK;
}
/* readonly attribute nsIDOMNode targetNode; */
NS_IMETHODIMP
nsContextMenuInfo::GetTargetNode(nsIDOMNode **aNode)
{
NS_ENSURE_ARG_POINTER(aNode);
NS_IF_ADDREF(*aNode = mDOMNode);
return NS_OK;
}
/* readonly attribute AString associatedLink; */
NS_IMETHODIMP
nsContextMenuInfo::GetAssociatedLink(nsAString& aHRef)
{
NS_ENSURE_STATE(mAssociatedLink);
aHRef.Truncate(0);
nsCOMPtr<nsIDOMElement> content(do_QueryInterface(mAssociatedLink));
nsAutoString localName;
if (content)
content->GetLocalName(localName);
nsCOMPtr<nsIDOMElement> linkContent;
ToLowerCase(localName);
if (localName.EqualsLiteral("a") ||
localName.EqualsLiteral("area") ||
localName.EqualsLiteral("link")) {
bool hasAttr;
content->HasAttribute(NS_LITERAL_STRING("href"), &hasAttr);
if (hasAttr) {
linkContent = content;
nsCOMPtr<nsIDOMHTMLAnchorElement> anchor(do_QueryInterface(linkContent));
if (anchor)
anchor->GetHref(aHRef);
else {
nsCOMPtr<nsIDOMHTMLAreaElement> area(do_QueryInterface(linkContent));
if (area)
area->GetHref(aHRef);
else {
nsCOMPtr<nsIDOMHTMLLinkElement> link(do_QueryInterface(linkContent));
if (link)
link->GetHref(aHRef);
}
}
}
}
else {
nsCOMPtr<nsIDOMNode> curr;
mAssociatedLink->GetParentNode(getter_AddRefs(curr));
while (curr) {
content = do_QueryInterface(curr);
if (!content)
break;
content->GetLocalName(localName);
ToLowerCase(localName);
if (localName.EqualsLiteral("a")) {
bool hasAttr;
content->HasAttribute(NS_LITERAL_STRING("href"), &hasAttr);
if (hasAttr) {
linkContent = content;
nsCOMPtr<nsIDOMHTMLAnchorElement> anchor(do_QueryInterface(linkContent));
if (anchor)
anchor->GetHref(aHRef);
}
else
linkContent = nullptr; // Links can't be nested.
break;
}
nsCOMPtr<nsIDOMNode> temp = curr;
temp->GetParentNode(getter_AddRefs(curr));
}
}
return NS_OK;
}
/* readonly attribute imgIContainer imageContainer; */
NS_IMETHODIMP
nsContextMenuInfo::GetImageContainer(imgIContainer **aImageContainer)
{
NS_ENSURE_ARG_POINTER(aImageContainer);
NS_ENSURE_STATE(mDOMNode);
nsCOMPtr<imgIRequest> request;
GetImageRequest(mDOMNode, getter_AddRefs(request));
if (request)
return request->GetImage(aImageContainer);
return NS_ERROR_FAILURE;
}
/* readonly attribute nsIURI imageSrc; */
NS_IMETHODIMP
nsContextMenuInfo::GetImageSrc(nsIURI **aURI)
{
NS_ENSURE_ARG_POINTER(aURI);
NS_ENSURE_STATE(mDOMNode);
nsCOMPtr<nsIImageLoadingContent> content(do_QueryInterface(mDOMNode));
NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
return content->GetCurrentURI(aURI);
}
/* readonly attribute imgIContainer backgroundImageContainer; */
NS_IMETHODIMP
nsContextMenuInfo::GetBackgroundImageContainer(imgIContainer **aImageContainer)
{
NS_ENSURE_ARG_POINTER(aImageContainer);
NS_ENSURE_STATE(mDOMNode);
nsRefPtr<imgRequestProxy> request;
GetBackgroundImageRequest(mDOMNode, getter_AddRefs(request));
if (request)
return request->GetImage(aImageContainer);
return NS_ERROR_FAILURE;
}
/* readonly attribute nsIURI backgroundImageSrc; */
NS_IMETHODIMP
nsContextMenuInfo::GetBackgroundImageSrc(nsIURI **aURI)
{
NS_ENSURE_ARG_POINTER(aURI);
NS_ENSURE_STATE(mDOMNode);
nsRefPtr<imgRequestProxy> request;
GetBackgroundImageRequest(mDOMNode, getter_AddRefs(request));
if (request)
return request->GetURI(aURI);
return NS_ERROR_FAILURE;
}
//*****************************************************************************
nsresult
nsContextMenuInfo::GetImageRequest(nsIDOMNode *aDOMNode, imgIRequest **aRequest)
{
NS_ENSURE_ARG(aDOMNode);
NS_ENSURE_ARG_POINTER(aRequest);
// Get content
nsCOMPtr<nsIImageLoadingContent> content(do_QueryInterface(aDOMNode));
NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
return content->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
aRequest);
}
bool
nsContextMenuInfo::HasBackgroundImage(nsIDOMNode * aDOMNode)
{
NS_ENSURE_TRUE(aDOMNode, false);
nsRefPtr<imgRequestProxy> request;
GetBackgroundImageRequest(aDOMNode, getter_AddRefs(request));
return (request != nullptr);
}
nsresult
nsContextMenuInfo::GetBackgroundImageRequest(nsIDOMNode *aDOMNode, imgRequestProxy **aRequest)
{
NS_ENSURE_ARG(aDOMNode);
NS_ENSURE_ARG_POINTER(aRequest);
nsCOMPtr<nsIDOMNode> domNode = aDOMNode;
// special case for the <html> element: if it has no background-image
// we'll defer to <body>
nsCOMPtr<nsIDOMHTMLHtmlElement> htmlElement = do_QueryInterface(domNode);
if (htmlElement) {
nsCOMPtr<nsIDOMHTMLElement> element = do_QueryInterface(domNode);
nsAutoString nameSpace;
element->GetNamespaceURI(nameSpace);
if (nameSpace.IsEmpty()) {
nsresult rv = GetBackgroundImageRequestInternal(domNode, aRequest);
if (NS_SUCCEEDED(rv) && *aRequest)
return NS_OK;
// no background-image found
nsCOMPtr<nsIDOMDocument> document;
domNode->GetOwnerDocument(getter_AddRefs(document));
nsCOMPtr<nsIDOMHTMLDocument> htmlDocument(do_QueryInterface(document));
NS_ENSURE_TRUE(htmlDocument, NS_ERROR_FAILURE);
nsCOMPtr<nsIDOMHTMLElement> body;
htmlDocument->GetBody(getter_AddRefs(body));
domNode = do_QueryInterface(body);
NS_ENSURE_TRUE(domNode, NS_ERROR_FAILURE);
}
}
return GetBackgroundImageRequestInternal(domNode, aRequest);
}
nsresult
nsContextMenuInfo::GetBackgroundImageRequestInternal(nsIDOMNode *aDOMNode, imgRequestProxy **aRequest)
{
NS_ENSURE_ARG_POINTER(aDOMNode);
nsCOMPtr<nsIDOMNode> domNode = aDOMNode;
nsCOMPtr<nsIDOMNode> parentNode;
nsCOMPtr<nsIDOMDocument> document;
domNode->GetOwnerDocument(getter_AddRefs(document));
NS_ENSURE_TRUE(document, NS_ERROR_FAILURE);
nsCOMPtr<nsIDOMWindow> window;
document->GetDefaultView(getter_AddRefs(window));
NS_ENSURE_TRUE(window, NS_ERROR_FAILURE);
nsCOMPtr<nsIDOMCSSPrimitiveValue> primitiveValue;
nsAutoString bgStringValue;
nsCOMPtr<nsIDocument> doc(do_QueryInterface(document));
nsCOMPtr<nsIPrincipal> principal = doc ? doc->NodePrincipal() : nullptr;
while (true) {
nsCOMPtr<nsIDOMElement> domElement(do_QueryInterface(domNode));
// bail for the parent node of the root element or null argument
if (!domElement)
break;
nsCOMPtr<nsIDOMCSSStyleDeclaration> computedStyle;
window->GetComputedStyle(domElement, EmptyString(),
getter_AddRefs(computedStyle));
if (computedStyle) {
nsCOMPtr<nsIDOMCSSValue> cssValue;
computedStyle->GetPropertyCSSValue(NS_LITERAL_STRING("background-image"),
getter_AddRefs(cssValue));
primitiveValue = do_QueryInterface(cssValue);
if (primitiveValue) {
primitiveValue->GetStringValue(bgStringValue);
if (!bgStringValue.EqualsLiteral("none")) {
nsCOMPtr<nsIURI> bgUri;
NS_NewURI(getter_AddRefs(bgUri), bgStringValue);
NS_ENSURE_TRUE(bgUri, NS_ERROR_FAILURE);
nsRefPtr<imgLoader> il = imgLoader::GetInstance();
NS_ENSURE_TRUE(il, NS_ERROR_FAILURE);
return il->LoadImage(bgUri, nullptr, nullptr,
doc->GetReferrerPolicy(), principal, nullptr,
nullptr, nullptr, nsIRequest::LOAD_NORMAL,
nullptr, nsIContentPolicy::TYPE_IMAGE,
EmptyString(), aRequest);
}
}
// bail if we encounter non-transparent background-color
computedStyle->GetPropertyCSSValue(NS_LITERAL_STRING("background-color"),
getter_AddRefs(cssValue));
primitiveValue = do_QueryInterface(cssValue);
if (primitiveValue) {
primitiveValue->GetStringValue(bgStringValue);
if (!bgStringValue.EqualsLiteral("transparent"))
return NS_ERROR_FAILURE;
}
}
domNode->GetParentNode(getter_AddRefs(parentNode));
domNode = parentNode;
}
return NS_ERROR_FAILURE;
}