summaryrefslogtreecommitdiffstats
path: root/dom/base/nsGenConImageContent.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'dom/base/nsGenConImageContent.cpp')
-rw-r--r--dom/base/nsGenConImageContent.cpp127
1 files changed, 127 insertions, 0 deletions
diff --git a/dom/base/nsGenConImageContent.cpp b/dom/base/nsGenConImageContent.cpp
new file mode 100644
index 000000000..e1b1f5a17
--- /dev/null
+++ b/dom/base/nsGenConImageContent.cpp
@@ -0,0 +1,127 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+/**
+ * A fake content node class so that the image frame for
+ * content: url(foo);
+ * in CSS can have an nsIImageLoadingContent but use an
+ * imgIRequest that's already been loaded from the style system.
+ */
+
+#include "nsContentCreatorFunctions.h"
+#include "nsXMLElement.h"
+#include "nsImageLoadingContent.h"
+#include "imgIRequest.h"
+#include "mozilla/BasicEvents.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/EventStates.h"
+
+using namespace mozilla;
+
+class nsGenConImageContent final : public nsXMLElement,
+ public nsImageLoadingContent
+{
+public:
+ explicit nsGenConImageContent(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
+ : nsXMLElement(aNodeInfo)
+ {
+ // nsImageLoadingContent starts out broken, so we start out
+ // suppressed to match it.
+ AddStatesSilently(NS_EVENT_STATE_SUPPRESSED);
+ }
+
+ nsresult Init(imgRequestProxy* aImageRequest)
+ {
+ // No need to notify, since we have no frame.
+ return UseAsPrimaryRequest(aImageRequest, false, eImageLoadType_Normal);
+ }
+
+ // nsIContent overrides
+ virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
+ nsIContent* aBindingParent,
+ bool aCompileEventHandlers) override;
+ virtual void UnbindFromTree(bool aDeep, bool aNullParent) override;
+ virtual EventStates IntrinsicState() const override;
+
+ virtual nsresult PreHandleEvent(EventChainPreVisitor& aVisitor) override
+ {
+ MOZ_ASSERT(IsInNativeAnonymousSubtree());
+ if (aVisitor.mEvent->mMessage == eLoad ||
+ aVisitor.mEvent->mMessage == eLoadError) {
+ // Don't propagate the events to the parent.
+ return NS_OK;
+ }
+ return nsXMLElement::PreHandleEvent(aVisitor);
+ }
+
+private:
+ virtual ~nsGenConImageContent();
+
+public:
+ NS_DECL_ISUPPORTS_INHERITED
+};
+
+NS_IMPL_ISUPPORTS_INHERITED(nsGenConImageContent,
+ nsXMLElement,
+ nsIImageLoadingContent,
+ imgINotificationObserver,
+ imgIOnloadBlocker)
+
+nsresult
+NS_NewGenConImageContent(nsIContent** aResult, already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
+ imgRequestProxy* aImageRequest)
+{
+ NS_PRECONDITION(aImageRequest, "Must have request!");
+ nsGenConImageContent *it = new nsGenConImageContent(aNodeInfo);
+ NS_ADDREF(*aResult = it);
+ nsresult rv = it->Init(aImageRequest);
+ if (NS_FAILED(rv))
+ NS_RELEASE(*aResult);
+ return rv;
+}
+
+nsGenConImageContent::~nsGenConImageContent()
+{
+ DestroyImageLoadingContent();
+}
+
+nsresult
+nsGenConImageContent::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
+ nsIContent* aBindingParent,
+ bool aCompileEventHandlers)
+{
+ nsresult rv;
+ rv = nsXMLElement::BindToTree(aDocument, aParent, aBindingParent,
+ aCompileEventHandlers);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsImageLoadingContent::BindToTree(aDocument, aParent, aBindingParent,
+ aCompileEventHandlers);
+ return NS_OK;
+}
+
+void
+nsGenConImageContent::UnbindFromTree(bool aDeep, bool aNullParent)
+{
+ nsImageLoadingContent::UnbindFromTree(aDeep, aNullParent);
+ nsXMLElement::UnbindFromTree(aDeep, aNullParent);
+}
+
+EventStates
+nsGenConImageContent::IntrinsicState() const
+{
+ EventStates state = nsXMLElement::IntrinsicState();
+
+ EventStates imageState = nsImageLoadingContent::ImageState();
+ if (imageState.HasAtLeastOneOfStates(NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED)) {
+ // We should never be in an error state; if the image fails to load, we
+ // just go to the suppressed state.
+ imageState |= NS_EVENT_STATE_SUPPRESSED;
+ imageState &= ~NS_EVENT_STATE_BROKEN;
+ }
+ imageState &= ~NS_EVENT_STATE_LOADING;
+ return state | imageState;
+}