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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 "NativeMenu.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLImageElement.h"
#include "mozilla/dom/ResponsiveImageSelector.h"
#include "mozilla/ComputedStyle.h"
#include "nsComputedDOMStyle.h"
namespace mozilla::widget {
NativeMenuIcon NativeMenu::GetIcon(dom::Element& aElement) {
RefPtr img =
dom::HTMLImageElement::FromNodeOrNull(aElement.GetFirstElementChild());
if (!img) {
return {};
}
// We need the style for context paint, even if we end up using the image
// attribute.
RefPtr<const ComputedStyle> style = nsComputedDOMStyle::GetComputedStyle(img);
if (RefPtr uri = img->GetCurrentURI()) {
return {std::move(uri), std::move(style)};
}
// Try to take the selected image from the image selector. This works even if
// the image hasn't loaded yet (due to loading=lazy or such).
if (auto* selector = img->GetResponsiveImageSelector()) {
if (RefPtr uri = selector->GetSelectedImageURL()) {
return {std::move(uri), std::move(style)};
}
}
// Otherwise look for the icon's content property.
if (!style) {
return {};
}
auto items = style->StyleContent()->NonAltContentItems();
if (items.Length() != 1 || !items[0].IsImage()) {
return {};
}
const auto* url = items[0].AsImage().GetImageRequestURLValue();
if (!url) {
return {};
}
RefPtr uri = url->GetURI();
if (!uri) {
return {};
}
return {std::move(uri), std::move(style)};
}
} // namespace mozilla::widget
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