chromium/third_party/blink/renderer/core/html/lazy_load_image_observer.cc

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/renderer/core/html/lazy_load_image_observer.h"

#include <limits>

#include "third_party/blink/public/platform/web_effective_connection_type.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/dom/flat_tree_traversal.h"
#include "third_party/blink/renderer/core/dom/node_computed_style.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/settings.h"
#include "third_party/blink/renderer/core/html/html_image_element.h"
#include "third_party/blink/renderer/core/html_element_type_helpers.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/core/intersection_observer/intersection_observer.h"
#include "third_party/blink/renderer/core/intersection_observer/intersection_observer_entry.h"
#include "third_party/blink/renderer/core/style/computed_style.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_vector.h"
#include "third_party/blink/renderer/platform/network/network_state_notifier.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"

namespace blink {

namespace {

// Returns if the element or its ancestors are invisible, due to their style or
// attribute or due to themselves not connected to the main document tree.
bool IsElementInInvisibleSubTree(const Element& element) { … }

bool IsDescendantOrSameDocument(Document& subject, Document& root) { … }

}  // namespace

void LazyLoadImageObserver::StartMonitoringNearViewport(Document* root_document,
                                                        Element* element) { … }

void LazyLoadImageObserver::StopMonitoring(Element* element) { … }

bool LazyLoadImageObserver::LoadAllImagesAndBlockLoadEvent(
    Document& for_document) { … }

void LazyLoadImageObserver::LoadIfNearViewport(
    const HeapVector<Member<IntersectionObserverEntry>>& entries) { … }

void LazyLoadImageObserver::Trace(Visitor* visitor) const { … }

int LazyLoadImageObserver::GetLazyLoadingImageMarginPx(
    const Document& document) { … }

}  // namespace blink