blob: e91013a21d7be1974730edba3f868389992295fc [file] [log] [blame]
/*
* Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
* 1999 Lars Knoll <knoll@kde.org>
* 1999 Antti Koivisto <koivisto@kde.org>
* 2000 Dirk Mueller <mueller@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* (C) 2006 Graham Dennis (graham.dennis@gmail.com)
* (C) 2006 Alexey Proskuryakov (ap@nypop.com)
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "third_party/blink/renderer/core/frame/local_frame_view.h"
#include <algorithm>
#include <memory>
#include <utility>
#include "base/memory/ptr_util.h"
#include "base/numerics/safe_conversions.h"
#include "cc/layers/picture_layer.h"
#include "third_party/blink/public/platform/task_type.h"
#include "third_party/blink/public/platform/web_rect.h"
#include "third_party/blink/public/platform/web_scroll_into_view_params.h"
#include "third_party/blink/renderer/core/accessibility/ax_object_cache.h"
#include "third_party/blink/renderer/core/animation/document_animations.h"
#include "third_party/blink/renderer/core/css/font_face_set_document.h"
#include "third_party/blink/renderer/core/css/style_change_reason.h"
#include "third_party/blink/renderer/core/dom/element_visibility_observer.h"
#include "third_party/blink/renderer/core/dom/static_node_list.h"
#include "third_party/blink/renderer/core/editing/compute_layer_selection.h"
#include "third_party/blink/renderer/core/editing/drag_caret.h"
#include "third_party/blink/renderer/core/editing/frame_selection.h"
#include "third_party/blink/renderer/core/editing/markers/document_marker_controller.h"
#include "third_party/blink/renderer/core/events/error_event.h"
#include "third_party/blink/renderer/core/exported/web_plugin_container_impl.h"
#include "third_party/blink/renderer/core/frame/browser_controls.h"
#include "third_party/blink/renderer/core/frame/event_handler_registry.h"
#include "third_party/blink/renderer/core/frame/frame_overlay.h"
#include "third_party/blink/renderer/core/frame/frame_view_auto_size_info.h"
#include "third_party/blink/renderer/core/frame/link_highlights.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/local_frame_client.h"
#include "third_party/blink/renderer/core/frame/local_frame_ukm_aggregator.h"
#include "third_party/blink/renderer/core/frame/location.h"
#include "third_party/blink/renderer/core/frame/page_scale_constraints_set.h"
#include "third_party/blink/renderer/core/frame/remote_frame.h"
#include "third_party/blink/renderer/core/frame/remote_frame_view.h"
#include "third_party/blink/renderer/core/frame/root_frame_viewport.h"
#include "third_party/blink/renderer/core/frame/scroll_into_view_options.h"
#include "third_party/blink/renderer/core/frame/settings.h"
#include "third_party/blink/renderer/core/frame/visual_viewport.h"
#include "third_party/blink/renderer/core/frame/web_local_frame_impl.h"
#include "third_party/blink/renderer/core/fullscreen/fullscreen.h"
#include "third_party/blink/renderer/core/html/forms/text_control_element.h"
#include "third_party/blink/renderer/core/html/html_frame_element.h"
#include "third_party/blink/renderer/core/html/html_plugin_element.h"
#include "third_party/blink/renderer/core/html/parser/text_resource_decoder.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/core/input/event_handler.h"
#include "third_party/blink/renderer/core/inspector/inspector_trace_events.h"
#include "third_party/blink/renderer/core/intersection_observer/intersection_observation.h"
#include "third_party/blink/renderer/core/intersection_observer/intersection_observer_controller.h"
#include "third_party/blink/renderer/core/intersection_observer/intersection_observer_init.h"
#include "third_party/blink/renderer/core/layout/adjust_for_absolute_zoom.h"
#include "third_party/blink/renderer/core/layout/jank_tracker.h"
#include "third_party/blink/renderer/core/layout/layout_analyzer.h"
#include "third_party/blink/renderer/core/layout/layout_counter.h"
#include "third_party/blink/renderer/core/layout/layout_embedded_content.h"
#include "third_party/blink/renderer/core/layout/layout_embedded_object.h"
#include "third_party/blink/renderer/core/layout/layout_view.h"
#include "third_party/blink/renderer/core/layout/ng/legacy_layout_tree_walking.h"
#include "third_party/blink/renderer/core/layout/svg/layout_svg_root.h"
#include "third_party/blink/renderer/core/layout/text_autosizer.h"
#include "third_party/blink/renderer/core/layout/traced_layout_object.h"
#include "third_party/blink/renderer/core/loader/document_loader.h"
#include "third_party/blink/renderer/core/loader/frame_loader.h"
#include "third_party/blink/renderer/core/media_type_names.h"
#include "third_party/blink/renderer/core/page/autoscroll_controller.h"
#include "third_party/blink/renderer/core/page/chrome_client.h"
#include "third_party/blink/renderer/core/page/focus_controller.h"
#include "third_party/blink/renderer/core/page/frame_tree.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/core/page/print_context.h"
#include "third_party/blink/renderer/core/page/scrolling/root_scroller_util.h"
#include "third_party/blink/renderer/core/page/scrolling/scrolling_coordinator.h"
#include "third_party/blink/renderer/core/page/scrolling/scrolling_coordinator_context.h"
#include "third_party/blink/renderer/core/page/scrolling/snap_coordinator.h"
#include "third_party/blink/renderer/core/page/scrolling/top_document_root_scroller_controller.h"
#include "third_party/blink/renderer/core/page/validation_message_client.h"
#include "third_party/blink/renderer/core/paint/block_paint_invalidator.h"
#include "third_party/blink/renderer/core/paint/compositing/composited_layer_mapping.h"
#include "third_party/blink/renderer/core/paint/compositing/compositing_inputs_updater.h"
#include "third_party/blink/renderer/core/paint/compositing/graphics_layer_tree_as_text.h"
#include "third_party/blink/renderer/core/paint/compositing/paint_layer_compositor.h"
#include "third_party/blink/renderer/core/paint/frame_painter.h"
#include "third_party/blink/renderer/core/paint/paint_layer.h"
#include "third_party/blink/renderer/core/paint/paint_layer_scrollable_area.h"
#include "third_party/blink/renderer/core/paint/paint_timing.h"
#include "third_party/blink/renderer/core/paint/paint_timing_detector.h"
#include "third_party/blink/renderer/core/paint/pre_paint_tree_walk.h"
#include "third_party/blink/renderer/core/probe/core_probes.h"
#include "third_party/blink/renderer/core/resize_observer/resize_observer_controller.h"
#include "third_party/blink/renderer/core/scroll/scroll_animator_base.h"
#include "third_party/blink/renderer/core/scroll/smooth_scroll_sequencer.h"
#include "third_party/blink/renderer/core/style/computed_style.h"
#include "third_party/blink/renderer/core/svg/svg_svg_element.h"
#include "third_party/blink/renderer/platform/bindings/script_forbidden_scope.h"
#include "third_party/blink/renderer/platform/fonts/font_cache.h"
#include "third_party/blink/renderer/platform/geometry/double_rect.h"
#include "third_party/blink/renderer/platform/geometry/float_quad.h"
#include "third_party/blink/renderer/platform/geometry/float_rect.h"
#include "third_party/blink/renderer/platform/geometry/layout_rect.h"
#include "third_party/blink/renderer/platform/graphics/compositing/paint_artifact_compositor.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context.h"
#include "third_party/blink/renderer/platform/graphics/graphics_layer.h"
#include "third_party/blink/renderer/platform/graphics/link_highlight.h"
#include "third_party/blink/renderer/platform/graphics/paint/cull_rect.h"
#include "third_party/blink/renderer/platform/graphics/paint/foreign_layer_display_item.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_controller.h"
#include "third_party/blink/renderer/platform/histogram.h"
#include "third_party/blink/renderer/platform/instrumentation/tracing/trace_event.h"
#include "third_party/blink/renderer/platform/instrumentation/tracing/traced_value.h"
#include "third_party/blink/renderer/platform/language.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource_fetcher.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"
#include "third_party/blink/renderer/platform/scheduler/public/frame_scheduler.h"
#include "third_party/blink/renderer/platform/scroll/scroll_alignment.h"
#include "third_party/blink/renderer/platform/transforms/transform_state.h"
#include "third_party/blink/renderer/platform/wtf/std_lib_extras.h"
#include "third_party/blink/renderer/platform/wtf/time.h"
// Used to check for dirty layouts violating document lifecycle rules.
// If arg evaluates to true, the program will continue. If arg evaluates to
// false, program will crash if DCHECK_IS_ON() or return false from the current
// function.
#define CHECK_FOR_DIRTY_LAYOUT(arg) \
do { \
if (!(arg)) { \
NOTREACHED(); \
return false; \
} \
} while (false)
namespace blink {
namespace {
// Page dimensions in pixels at 72 DPI.
constexpr int kA4PortraitPageWidth = 595;
constexpr int kA4PortraitPageHeight = 842;
constexpr int kLetterPortraitPageWidth = 612;
constexpr int kLetterPortraitPageHeight = 792;
constexpr char kCssFragmentIdentifierPrefix[] = "targetElement=";
constexpr size_t kCssFragmentIdentifierPrefixLength =
base::size(kCssFragmentIdentifierPrefix);
// Logs a UseCounter for the size of the cursor that will be set. This will be
// used for compatibility analysis to determine whether the maximum size can be
// reduced.
void LogCursorSizeCounter(LocalFrame* frame, const Cursor& cursor) {
DCHECK(frame);
Image* image = cursor.GetImage();
if (!image)
return;
// Should not overflow, this calculation is done elsewhere when determining
// whether the cursor exceeds its maximum size (see event_handler.cc).
IntSize scaled_size = image->Size();
scaled_size.Scale(1 / cursor.ImageScaleFactor());
if (scaled_size.Width() > 64 || scaled_size.Height() > 64) {
UseCounter::Count(frame, WebFeature::kCursorImageGT64x64);
} else if (scaled_size.Width() > 32 || scaled_size.Height() > 32) {
UseCounter::Count(frame, WebFeature::kCursorImageGT32x32);
} else {
UseCounter::Count(frame, WebFeature::kCursorImageLE32x32);
}
}
} // namespace
// The maximum number of updatePlugins iterations that should be done before
// returning.
static const unsigned kMaxUpdatePluginsIterations = 2;
static bool g_initial_track_all_paint_invalidations = false;
LocalFrameView::LocalFrameView(LocalFrame& frame, IntRect frame_rect)
: frame_(frame),
frame_rect_(frame_rect),
is_attached_(false),
display_mode_(kWebDisplayModeBrowser),
can_have_scrollbars_(true),
has_pending_layout_(false),
layout_scheduling_enabled_(true),
layout_count_for_testing_(0),
lifecycle_update_count_for_testing_(0),
nested_layout_count_(0),
update_plugins_timer_(frame.GetTaskRunner(TaskType::kInternalDefault),
this,
&LocalFrameView::UpdatePluginsTimerFired),
first_layout_(true),
base_background_color_(Color::kWhite),
last_zoom_factor_(1.0f),
media_type_(media_type_names::kScreen),
safe_to_propagate_scroll_to_parent_(true),
visually_non_empty_character_count_(0),
visually_non_empty_pixel_count_(0),
is_visually_non_empty_(false),
fragment_anchor_(nullptr),
sticky_position_object_count_(0),
input_events_scale_factor_for_emulation_(1),
layout_size_fixed_to_frame_size_(true),
needs_update_geometries_(false),
root_layer_did_scroll_(false),
frame_timing_requests_dirty_(true),
hidden_for_throttling_(false),
subtree_throttled_(false),
// The compositor throttles the main frame using deferred commits, we
// can't throttle it here or it seems the root compositor doesn't get
// setup properly.
lifecycle_updates_throttled_(!GetFrame().IsMainFrame()),
current_update_lifecycle_phases_target_state_(
DocumentLifecycle::kUninitialized),
past_layout_lifecycle_update_(false),
suppress_adjust_view_size_(false),
intersection_observation_state_(kNotNeeded),
needs_forced_compositing_update_(false),
needs_focus_on_fragment_(false),
tracked_object_paint_invalidations_(
base::WrapUnique(g_initial_track_all_paint_invalidations
? new Vector<ObjectPaintInvalidation>
: nullptr)),
main_thread_scrolling_reasons_(0),
forced_layout_stack_depth_(0),
forced_layout_start_time_(TimeTicks()),
paint_frame_count_(0),
unique_id_(NewUniqueObjectId()),
jank_tracker_(std::make_unique<JankTracker>(this)),
paint_timing_detector_(MakeGarbageCollected<PaintTimingDetector>(this)) {
// Propagate the marginwidth/height and scrolling modes to the view.
if (frame_->Owner() &&
frame_->Owner()->ScrollingMode() == kScrollbarAlwaysOff)
SetCanHaveScrollbars(false);
}
LocalFrameView* LocalFrameView::Create(LocalFrame& frame) {
LocalFrameView* view = MakeGarbageCollected<LocalFrameView>(frame, IntRect());
view->Show();
return view;
}
LocalFrameView* LocalFrameView::Create(LocalFrame& frame,
const IntSize& initial_size) {
LocalFrameView* view = MakeGarbageCollected<LocalFrameView>(
frame, IntRect(IntPoint(), initial_size));
view->SetLayoutSizeInternal(initial_size);
view->Show();
return view;
}
LocalFrameView::~LocalFrameView() {
#if DCHECK_IS_ON()
DCHECK(has_been_disposed_);
#endif
}
void LocalFrameView::Trace(blink::Visitor* visitor) {
visitor->Trace(frame_);
visitor->Trace(parent_);
visitor->Trace(fragment_anchor_);
visitor->Trace(scrollable_areas_);
visitor->Trace(animating_scrollable_areas_);
visitor->Trace(auto_size_info_);
visitor->Trace(plugins_);
visitor->Trace(scrollbars_);
visitor->Trace(viewport_scrollable_area_);
visitor->Trace(visibility_observer_);
visitor->Trace(anchoring_adjustment_queue_);
visitor->Trace(print_context_);
visitor->Trace(paint_timing_detector_);
visitor->Trace(lifecycle_observers_);
}
template <typename Function>
void LocalFrameView::ForAllChildViewsAndPlugins(const Function& function) {
for (Frame* child = frame_->Tree().FirstChild(); child;
child = child->Tree().NextSibling()) {
if (child->View())
function(*child->View());
}
for (const auto& plugin : plugins_) {
function(*plugin);
}
}
template <typename Function>
void LocalFrameView::ForAllChildLocalFrameViews(const Function& function) {
for (Frame* child = frame_->Tree().FirstChild(); child;
child = child->Tree().NextSibling()) {
if (!child->IsLocalFrame())
continue;
if (LocalFrameView* child_view = ToLocalFrame(child)->View())
function(*child_view);
}
}
// Call function for each non-throttled frame view in pre tree order.
template <typename Function>
void LocalFrameView::ForAllNonThrottledLocalFrameViews(
const Function& function) {
if (ShouldThrottleRendering())
return;
function(*this);
for (Frame* child = frame_->Tree().FirstChild(); child;
child = child->Tree().NextSibling()) {
if (!child->IsLocalFrame())
continue;
if (LocalFrameView* child_view = ToLocalFrame(child)->View())
child_view->ForAllNonThrottledLocalFrameViews(function);
}
}
void LocalFrameView::SetupRenderThrottling() {
if (visibility_observer_)
return;
// We observe the frame owner element instead of the document element, because
// if the document has no content we can falsely think the frame is invisible.
// Note that this means we cannot throttle top-level frames or (currently)
// frames whose owner element is remote.
Element* target_element = GetFrame().DeprecatedLocalOwner();
if (!target_element)
return;
visibility_observer_ = MakeGarbageCollected<ElementVisibilityObserver>(
target_element, WTF::BindRepeating(
[](LocalFrameView* frame_view, bool is_visible) {
if (!frame_view)
return;
frame_view->UpdateRenderThrottlingStatus(
!is_visible, frame_view->subtree_throttled_);
},
WrapWeakPersistent(this)));
visibility_observer_->Start();
}
void LocalFrameView::Dispose() {
CHECK(!IsInPerformLayout());
// TODO(dcheng): It's wrong that the frame can be detached before the
// LocalFrameView. Figure out what's going on and fix LocalFrameView to be
// disposed with the correct timing.
// We need to clear the RootFrameViewport's animator since it gets called
// from non-GC'd objects and RootFrameViewport will still have a pointer to
// this class.
if (viewport_scrollable_area_)
viewport_scrollable_area_->ClearScrollableArea();
// Destroy |m_autoSizeInfo| as early as possible, to avoid dereferencing
// partially destroyed |this| via |m_autoSizeInfo->m_frameView|.
auto_size_info_.Clear();
// FIXME: Do we need to do something here for OOPI?
HTMLFrameOwnerElement* owner_element = frame_->DeprecatedLocalOwner();
// TODO(dcheng): It seems buggy that we can have an owner element that points
// to another EmbeddedContentView. This can happen when a plugin element loads
// a frame (EmbeddedContentView A of type LocalFrameView) and then loads a
// plugin (EmbeddedContentView B of type WebPluginContainerImpl). In this
// case, the frame's view is A and the frame element's
// OwnedEmbeddedContentView is B. See https://crbug.com/673170 for an example.
if (owner_element && owner_element->OwnedEmbeddedContentView() == this)
owner_element->SetEmbeddedContentView(nullptr);
ClearPrintContext();
ukm_aggregator_.reset();
jank_tracker_->Dispose();
#if DCHECK_IS_ON()
has_been_disposed_ = true;
#endif
}
void LocalFrameView::InvalidateAllCustomScrollbarsOnActiveChanged() {
bool uses_window_inactive_selector =
frame_->GetDocument()->GetStyleEngine().UsesWindowInactiveSelector();
ForAllChildLocalFrameViews([](LocalFrameView& frame_view) {
frame_view.InvalidateAllCustomScrollbarsOnActiveChanged();
});
for (const auto& scrollbar : scrollbars_) {
if (uses_window_inactive_selector && scrollbar->IsCustomScrollbar())
scrollbar->StyleChanged();
}
}
bool LocalFrameView::DidFirstLayout() const {
return !first_layout_;
}
bool LocalFrameView::LifecycleUpdatesActive() const {
return !lifecycle_updates_throttled_;
}
void LocalFrameView::SetLifecycleUpdatesThrottledForTesting() {
lifecycle_updates_throttled_ = true;
}
void LocalFrameView::InvalidateRect(const IntRect& rect) {
auto* layout_object = frame_->OwnerLayoutObject();
if (!layout_object)
return;
IntRect paint_invalidation_rect = rect;
paint_invalidation_rect.Move(
(layout_object->BorderLeft() + layout_object->PaddingLeft()).ToInt(),
(layout_object->BorderTop() + layout_object->PaddingTop()).ToInt());
layout_object->InvalidatePaintRectangle(LayoutRect(paint_invalidation_rect));
}
void LocalFrameView::SetFrameRect(const IntRect& unclamped_frame_rect) {
IntRect frame_rect(SaturatedRect(unclamped_frame_rect));
if (frame_rect == frame_rect_)
return;
const bool width_changed = frame_rect_.Width() != frame_rect.Width();
const bool height_changed = frame_rect_.Height() != frame_rect.Height();
frame_rect_ = frame_rect;
FrameRectsChanged();
if (auto* layout_view = GetLayoutView())
layout_view->SetShouldCheckForPaintInvalidation();
if (width_changed || height_changed) {
ViewportSizeChanged(width_changed, height_changed);
if (frame_->IsMainFrame())
frame_->GetPage()->GetVisualViewport().MainFrameDidChangeSize();
GetFrame().Loader().RestoreScrollPositionAndViewState();
}
}
IntPoint LocalFrameView::Location() const {
IntPoint location(frame_rect_.Location());
// As an optimization, we don't include the root layer's scroll offset in the
// frame rect. As a result, we don't need to recalculate the frame rect every
// time the root layer scrolls, but we need to add it in here.
LayoutEmbeddedContent* owner = frame_->OwnerLayoutObject();
if (owner) {
LayoutView* owner_layout_view = owner->View();
DCHECK(owner_layout_view);
if (owner_layout_view->HasOverflowClip()) {
IntSize scroll_offset(owner_layout_view->ScrolledContentOffset());
location.SaturatedMove(-scroll_offset.Width(), -scroll_offset.Height());
}
}
return location;
}
Page* LocalFrameView::GetPage() const {
return GetFrame().GetPage();
}
LayoutView* LocalFrameView::GetLayoutView() const {
return GetFrame().ContentLayoutObject();
}
ScrollingCoordinator* LocalFrameView::GetScrollingCoordinator() const {
Page* p = GetPage();
return p ? p->GetScrollingCoordinator() : nullptr;
}
ScrollingCoordinatorContext* LocalFrameView::GetScrollingContext() const {
LocalFrame* root = &GetFrame().LocalFrameRoot();
if (GetFrame() != root)
return root->View()->GetScrollingContext();
if (!scrolling_context_)
scrolling_context_.reset(new ScrollingCoordinatorContext());
return scrolling_context_.get();
}
CompositorAnimationHost* LocalFrameView::GetCompositorAnimationHost() const {
if (GetScrollingContext()->GetCompositorAnimationHost())
return GetScrollingContext()->GetCompositorAnimationHost();
if (!GetFrame().LocalFrameRoot().IsMainFrame())
return nullptr;
// TODO(kenrb): Compositor animation host and timeline for the main frame
// still live on ScrollingCoordinator. https://crbug.com/680606.
ScrollingCoordinator* c = GetScrollingCoordinator();
return c ? c->GetCompositorAnimationHost() : nullptr;
}
CompositorAnimationTimeline* LocalFrameView::GetCompositorAnimationTimeline()
const {
if (GetScrollingContext()->GetCompositorAnimationTimeline())
return GetScrollingContext()->GetCompositorAnimationTimeline();
if (!GetFrame().LocalFrameRoot().IsMainFrame())
return nullptr;
// TODO(kenrb): Compositor animation host and timeline for the main frame
// still live on ScrollingCoordinator. https://crbug.com/680606.
ScrollingCoordinator* c = GetScrollingCoordinator();
return c ? c->GetCompositorAnimationTimeline() : nullptr;
}
void LocalFrameView::SetLayoutOverflowSize(const IntSize& size) {
if (size == layout_overflow_size_)
return;
layout_overflow_size_ = size;
Page* page = GetFrame().GetPage();
if (!page)
return;
page->GetChromeClient().ContentsSizeChanged(frame_.Get(), size);
}
void LocalFrameView::AdjustViewSize() {
if (suppress_adjust_view_size_)
return;
LayoutView* layout_view = GetLayoutView();
if (!layout_view)
return;
DCHECK_EQ(frame_->View(), this);
SetLayoutOverflowSize(layout_view->DocumentRect().Size());
}
void LocalFrameView::AdjustViewSizeAndLayout() {
AdjustViewSize();
if (NeedsLayout()) {
base::AutoReset<bool> suppress_adjust_view_size(&suppress_adjust_view_size_,
true);
UpdateLayout();
}
}
void LocalFrameView::UpdateAcceleratedCompositingSettings() {
if (auto* layout_view = GetLayoutView())
layout_view->Compositor()->UpdateAcceleratedCompositingSettings();
}
void LocalFrameView::UpdateCountersAfterStyleChange() {
auto* layout_view = GetLayoutView();
DCHECK(layout_view);
layout_view->UpdateCounters();
}
void LocalFrameView::CountObjectsNeedingLayout(unsigned& needs_layout_objects,
unsigned& total_objects,
bool& is_subtree) {
needs_layout_objects = 0;
total_objects = 0;
is_subtree = IsSubtreeLayout();
if (is_subtree) {
layout_subtree_root_list_.CountObjectsNeedingLayout(needs_layout_objects,
total_objects);
} else {
LayoutSubtreeRootList::CountObjectsNeedingLayoutInRoot(
GetLayoutView(), needs_layout_objects, total_objects);
}
}
void LocalFrameView::PerformPreLayoutTasks() {
TRACE_EVENT0("blink,benchmark", "LocalFrameView::performPreLayoutTasks");
Lifecycle().AdvanceTo(DocumentLifecycle::kInPreLayout);
// Don't schedule more layouts, we're in one.
base::AutoReset<bool> change_scheduling_enabled(&layout_scheduling_enabled_,
false);
bool was_resized = WasViewportResized();
Document* document = frame_->GetDocument();
if (was_resized)
document->SetResizedForViewportUnits();
// Viewport-dependent or device-dependent media queries may cause us to need
// completely different style information.
bool main_frame_rotation =
frame_->IsMainFrame() && frame_->GetSettings() &&
frame_->GetSettings()->GetMainFrameResizesAreOrientationChanges();
if ((was_resized &&
document->GetStyleEngine().MediaQueryAffectedByViewportChange()) ||
(was_resized && main_frame_rotation &&
document->GetStyleEngine().MediaQueryAffectedByDeviceChange())) {
document->MediaQueryAffectingValueChanged();
} else if (was_resized) {
document->EvaluateMediaQueryList();
}
document->UpdateStyleAndLayoutTree();
Lifecycle().AdvanceTo(DocumentLifecycle::kStyleClean);
if (was_resized)
document->ClearResizedForViewportUnits();
}
void LocalFrameView::LayoutFromRootObject(LayoutObject& root) {
LayoutState layout_state(root);
if (!root.IsBoxModelObject()) {
root.UpdateLayout();
} else {
// Laying out the root may change its visual overflow. If so, that
// visual overflow needs to propagate to its containing block.
LayoutBoxModelObject& box_object = ToLayoutBoxModelObject(root);
LayoutRect previous_visual_overflow_rect = box_object.VisualOverflowRect();
box_object.UpdateLayout();
if (box_object.VisualOverflowRect() != previous_visual_overflow_rect) {
// TODO(chrishtr): this can probably just set the dirty bit for
// visual overflow, not layout overflow.
box_object.SetNeedsOverflowRecalc();
GetLayoutView()->RecalcOverflow();
}
}
}
void LocalFrameView::PrepareLayoutAnalyzer() {
bool is_tracing = false;
TRACE_EVENT_CATEGORY_GROUP_ENABLED(
TRACE_DISABLED_BY_DEFAULT("blink.debug.layout"), &is_tracing);
if (!is_tracing) {
analyzer_.reset();
return;
}
if (!analyzer_)
analyzer_ = std::make_unique<LayoutAnalyzer>();
analyzer_->Reset();
}
std::unique_ptr<TracedValue> LocalFrameView::AnalyzerCounters() {
if (!analyzer_)
return TracedValue::Create();
std::unique_ptr<TracedValue> value = analyzer_->ToTracedValue();
value->SetString("host", GetLayoutView()->GetDocument().location()->host());
value->SetString(
"frame",
String::Format("0x%" PRIxPTR, reinterpret_cast<uintptr_t>(frame_.Get())));
value->SetInteger("contentsHeightAfterLayout",
GetLayoutView()->DocumentRect().Height());
value->SetInteger("visibleHeight", Height());
value->SetInteger("approximateBlankCharacterCount",
base::saturated_cast<int>(
FontFaceSetDocument::ApproximateBlankCharacterCount(
*frame_->GetDocument())));
return value;
}
#define PERFORM_LAYOUT_TRACE_CATEGORIES \
"blink,benchmark,rail," TRACE_DISABLED_BY_DEFAULT("blink.debug.layout")
void LocalFrameView::PerformLayout(bool in_subtree_layout) {
DCHECK(in_subtree_layout || layout_subtree_root_list_.IsEmpty());
int contents_height_before_layout = GetLayoutView()->DocumentRect().Height();
TRACE_EVENT_BEGIN1(
PERFORM_LAYOUT_TRACE_CATEGORIES, "LocalFrameView::performLayout",
"contentsHeightBeforeLayout", contents_height_before_layout);
PrepareLayoutAnalyzer();
ScriptForbiddenScope forbid_script;
if (in_subtree_layout && HasOrthogonalWritingModeRoots()) {
// If we're going to lay out from each subtree root, rather than once from
// LayoutView, we need to merge the depth-ordered orthogonal writing mode
// root list into the depth-ordered list of subtrees scheduled for
// layout. Otherwise, during layout of one such subtree, we'd risk skipping
// over a subtree of objects needing layout.
DCHECK(!layout_subtree_root_list_.IsEmpty());
ScheduleOrthogonalWritingModeRootsForLayout();
}
DCHECK(!IsInPerformLayout());
Lifecycle().AdvanceTo(DocumentLifecycle::kInPerformLayout);
// performLayout is the actual guts of layout().
// FIXME: The 300 other lines in layout() probably belong in other helper
// functions so that a single human could understand what layout() is actually
// doing.
{
// TODO(szager): Remove this after diagnosing crash.
DocumentLifecycle::CheckNoTransitionScope check_no_transition(Lifecycle());
if (in_subtree_layout) {
if (analyzer_) {
analyzer_->Increment(LayoutAnalyzer::kPerformLayoutRootLayoutObjects,
layout_subtree_root_list_.size());
}
for (auto& root : layout_subtree_root_list_.Ordered()) {
if (!root->NeedsLayout())
continue;
LayoutFromRootObject(*root);
// We need to ensure that we mark up all layoutObjects up to the
// LayoutView for paint invalidation. This simplifies our code as we
// just always do a full tree walk.
if (LayoutObject* container = root->Container())
container->SetShouldCheckForPaintInvalidation();
}
layout_subtree_root_list_.Clear();
} else {
if (HasOrthogonalWritingModeRoots())
LayoutOrthogonalWritingModeRoots();
GetLayoutView()->UpdateLayout();
}
}
frame_->GetDocument()->Fetcher()->UpdateAllImageResourcePriorities();
Lifecycle().AdvanceTo(DocumentLifecycle::kAfterPerformLayout);
TRACE_EVENT_END1(PERFORM_LAYOUT_TRACE_CATEGORIES,
"LocalFrameView::performLayout", "counters",
AnalyzerCounters());
FirstMeaningfulPaintDetector::From(*frame_->GetDocument())
.MarkNextPaintAsMeaningfulIfNeeded(
layout_object_counter_, contents_height_before_layout,
GetLayoutView()->DocumentRect().Height(), Height());
}
void LocalFrameView::UpdateLayout() {
// We should never layout a Document which is not in a LocalFrame.
DCHECK(frame_);
DCHECK_EQ(frame_->View(), this);
DCHECK(frame_->GetPage());
{
ScriptForbiddenScope forbid_script;
if (IsInPerformLayout() || ShouldThrottleRendering() ||
!frame_->GetDocument()->IsActive())
return;
TRACE_EVENT0("blink,benchmark", "LocalFrameView::layout");
RUNTIME_CALL_TIMER_SCOPE(V8PerIsolateData::MainThreadIsolate(),
RuntimeCallStats::CounterId::kUpdateLayout);
// The actual call to UpdateGeometries is in PerformPostLayoutTasks.
SetNeedsUpdateGeometries();
if (auto_size_info_)
auto_size_info_->AutoSizeIfNeeded();
has_pending_layout_ = false;
Document* document = frame_->GetDocument();
TRACE_EVENT_BEGIN1("devtools.timeline", "Layout", "beginData",
inspector_layout_event::BeginData(this));
probe::UpdateLayout probe(document);
PerformPreLayoutTasks();
VisualViewport& visual_viewport = frame_->GetPage()->GetVisualViewport();
DoubleSize viewport_size(visual_viewport.VisibleWidthCSSPx(),
visual_viewport.VisibleHeightCSSPx());
// TODO(crbug.com/460956): The notion of a single root for layout is no
// longer applicable. Remove or update this code.
LayoutObject* root_for_this_layout = GetLayoutView();
FontCachePurgePreventer font_cache_purge_preventer;
{
base::AutoReset<bool> change_scheduling_enabled(
&layout_scheduling_enabled_, false);
nested_layout_count_++;
// If the layout view was marked as needing layout after we added items in
// the subtree roots we need to clear the roots and do the layout from the
// layoutView.
if (GetLayoutView()->NeedsLayout())
ClearLayoutSubtreeRootsAndMarkContainingBlocks();
GetLayoutView()->ClearHitTestCache();
bool in_subtree_layout = IsSubtreeLayout();
// TODO(crbug.com/460956): The notion of a single root for layout is no
// longer applicable. Remove or update this code.
if (in_subtree_layout)
root_for_this_layout = layout_subtree_root_list_.RandomRoot();
if (!root_for_this_layout) {
// FIXME: Do we need to set m_size here?
NOTREACHED();
return;
}
if (!in_subtree_layout) {
ClearLayoutSubtreeRootsAndMarkContainingBlocks();
Node* body = document->body();
if (body && body->GetLayoutObject()) {
if (IsHTMLFrameSetElement(*body)) {
body->GetLayoutObject()->SetChildNeedsLayout();
} else if (IsHTMLBodyElement(*body)) {
if (!first_layout_ && size_.Height() != GetLayoutSize().Height() &&
body->GetLayoutObject()->EnclosingBox()->StretchesToViewport())
body->GetLayoutObject()->SetChildNeedsLayout();
}
}
if (first_layout_) {
first_layout_ = false;
last_viewport_size_ = GetLayoutSize();
last_zoom_factor_ = GetLayoutView()->StyleRef().Zoom();
ScrollbarMode h_mode;
ScrollbarMode v_mode;
GetLayoutView()->CalculateScrollbarModes(h_mode, v_mode);
if (v_mode == kScrollbarAuto) {
GetLayoutView()
->GetScrollableArea()
->ForceVerticalScrollbarForFirstLayout();
}
}
LayoutSize old_size = size_;
size_ = LayoutSize(GetLayoutSize());
if (old_size != size_ && !first_layout_) {
LayoutBox* root_layout_object =
document->documentElement()
? document->documentElement()->GetLayoutBox()
: nullptr;
LayoutBox* body_layout_object = root_layout_object && document->body()
? document->body()->GetLayoutBox()
: nullptr;
if (body_layout_object && body_layout_object->StretchesToViewport())
body_layout_object->SetChildNeedsLayout();
else if (root_layout_object &&
root_layout_object->StretchesToViewport())
root_layout_object->SetChildNeedsLayout();
}
}
TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(
TRACE_DISABLED_BY_DEFAULT("blink.debug.layout.trees"), "LayoutTree",
this, TracedLayoutObject::Create(*GetLayoutView(), false));
IntSize old_size(Size());
PerformLayout(in_subtree_layout);
IntSize new_size(Size());
if (old_size != new_size) {
SetNeedsLayout();
MarkViewportConstrainedObjectsForLayout(
old_size.Width() != new_size.Width(),
old_size.Height() != new_size.Height());
}
if (NeedsLayout()) {
base::AutoReset<bool> suppress(&suppress_adjust_view_size_, true);
UpdateLayout();
}
DCHECK(layout_subtree_root_list_.IsEmpty());
} // Reset m_layoutSchedulingEnabled to its previous value.
CheckDoesNotNeedLayout();
DocumentLifecycle::Scope lifecycle_scope(Lifecycle(),
DocumentLifecycle::kLayoutClean);
frame_timing_requests_dirty_ = true;
// FIXME: Could find the common ancestor layer of all dirty subtrees and
// mark from there. crbug.com/462719
GetLayoutView()->EnclosingLayer()->UpdateLayerPositionsAfterLayout();
TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(
TRACE_DISABLED_BY_DEFAULT("blink.debug.layout.trees"), "LayoutTree",
this, TracedLayoutObject::Create(*GetLayoutView(), true));
GetLayoutView()->Compositor()->DidLayout();
layout_count_for_testing_++;
if (AXObjectCache* cache = document->ExistingAXObjectCache()) {
const KURL& url = document->Url();
if (url.IsValid() && !url.IsAboutBlankURL()) {
cache->HandleLayoutComplete(document);
cache->ProcessUpdatesAfterLayout(*document);
}
}
UpdateDocumentAnnotatedRegions();
CheckDoesNotNeedLayout();
if (nested_layout_count_ == 1) {
PerformPostLayoutTasks();
CheckDoesNotNeedLayout();
}
// FIXME: The notion of a single root for layout is no longer applicable.
// Remove or update this code. crbug.com/460596
TRACE_EVENT_END1("devtools.timeline", "Layout", "endData",
inspector_layout_event::EndData(root_for_this_layout));
probe::didChangeViewport(frame_.Get());
nested_layout_count_--;
if (nested_layout_count_)
return;
#if DCHECK_IS_ON()
// Post-layout assert that nobody was re-marked as needing layout during
// layout.
GetLayoutView()->AssertSubtreeIsLaidOut();
#endif
if (frame_->IsMainFrame()) {
// Scrollbars changing state can cause a visual viewport size change.
DoubleSize new_viewport_size(visual_viewport.VisibleWidthCSSPx(),
visual_viewport.VisibleHeightCSSPx());
if (new_viewport_size != viewport_size)
frame_->GetDocument()->EnqueueVisualViewportResizeEvent();
}
} // ScriptForbiddenScope
GetFrame().GetDocument()->LayoutUpdated();
CheckDoesNotNeedLayout();
}
void LocalFrameView::WillStartForcedLayout() {
// UpdateLayoutIgnoringPendingStyleSheets is re-entrant for auto-sizing
// and plugins. So keep track of stack depth.
forced_layout_stack_depth_++;
if (forced_layout_stack_depth_ > 1)
return;
forced_layout_start_time_ = CurrentTimeTicks();
}
void LocalFrameView::DidFinishForcedLayout() {
CHECK_GT(forced_layout_stack_depth_, (unsigned)0);
forced_layout_stack_depth_--;
if (!forced_layout_stack_depth_ && base::TimeTicks::IsHighResolution()) {
LocalFrameUkmAggregator& aggregator = EnsureUkmAggregator();
aggregator.RecordSample(
(size_t)LocalFrameUkmAggregator::kForcedStyleAndLayout,
forced_layout_start_time_, CurrentTimeTicks());
}
}
void LocalFrameView::SetNeedsPaintPropertyUpdate() {
if (auto* layout_view = GetLayoutView())
layout_view->SetNeedsPaintPropertyUpdate();
}
FloatSize LocalFrameView::ViewportSizeForViewportUnits() const {
float zoom = 1;
if (!frame_->GetDocument() || !frame_->GetDocument()->Printing())
zoom = GetFrame().PageZoomFactor();
auto* layout_view = GetLayoutView();
if (!layout_view)
return FloatSize();
FloatSize layout_size;
layout_size.SetWidth(layout_view->ViewWidth(kIncludeScrollbars) / zoom);
layout_size.SetHeight(layout_view->ViewHeight(kIncludeScrollbars) / zoom);
BrowserControls& browser_controls = frame_->GetPage()->GetBrowserControls();
if (browser_controls.PermittedState() != cc::BrowserControlsState::kHidden) {
// We use the layoutSize rather than frameRect to calculate viewport units
// so that we get correct results on mobile where the page is laid out into
// a rect that may be larger than the viewport (e.g. the 980px fallback
// width for desktop pages). Since the layout height is statically set to
// be the viewport with browser controls showing, we add the browser
// controls height, compensating for page scale as well, since we want to
// use the viewport with browser controls hidden for vh (to match Safari).
int viewport_width = frame_->GetPage()->GetVisualViewport().Size().Width();
if (frame_->IsMainFrame() && layout_size.Width() && viewport_width) {
// TODO(bokan/eirage): BrowserControl height may need to account for the
// zoom factor when use-zoom-for-dsf is enabled on Android. Confirm this
// works correctly when that's turned on. https://crbug.com/737777.
float page_scale_at_layout_width = viewport_width / layout_size.Width();
layout_size.Expand(
0, browser_controls.TotalHeight() / page_scale_at_layout_width);
}
}
return layout_size;
}
FloatSize LocalFrameView::ViewportSizeForMediaQueries() const {
FloatSize viewport_size(GetLayoutSize());
if (!frame_->GetDocument() || !frame_->GetDocument()->Printing())
viewport_size.Scale(1 / GetFrame().PageZoomFactor());
return viewport_size;
}
DocumentLifecycle& LocalFrameView::Lifecycle() const {
DCHECK(frame_);
DCHECK(frame_->GetDocument());
return frame_->GetDocument()->Lifecycle();
}
LayoutSVGRoot* LocalFrameView::EmbeddedReplacedContent() const {
auto* layout_view = this->GetLayoutView();
if (!layout_view)
return nullptr;
LayoutObject* first_child = layout_view->FirstChild();
if (!first_child || !first_child->IsBox())
return nullptr;
// Currently only embedded SVG documents participate in the size-negotiation
// logic.
return ToLayoutSVGRootOrNull(first_child);
}
bool LocalFrameView::GetIntrinsicSizingInfo(
IntrinsicSizingInfo& intrinsic_sizing_info) const {
if (LayoutSVGRoot* content_layout_object = EmbeddedReplacedContent()) {
content_layout_object->UnscaledIntrinsicSizingInfo(intrinsic_sizing_info);
return true;
}
return false;
}
bool LocalFrameView::HasIntrinsicSizingInfo() const {
return EmbeddedReplacedContent();
}
void LocalFrameView::UpdateGeometry() {
LayoutEmbeddedContent* layout = frame_->OwnerLayoutObject();
if (!layout)
return;
bool did_need_layout = NeedsLayout();
LayoutRect new_frame = layout->ReplacedContentRect();
DCHECK(new_frame.Size() == RoundedIntSize(new_frame.Size()));
bool bounds_will_change = LayoutSize(Size()) != new_frame.Size();
// If frame bounds are changing mark the view for layout. Also check the
// frame's page to make sure that the frame isn't in the process of being
// destroyed. If iframe scrollbars needs reconstruction from native to custom
// scrollbar, then also we need to layout the frameview.
if (bounds_will_change)
SetNeedsLayout();
layout->UpdateGeometry(*this);
// If view needs layout, either because bounds have changed or possibly
// indicating content size is wrong, we have to do a layout to set the right
// LocalFrameView size.
if (NeedsLayout())
UpdateLayout();
if (!did_need_layout && !ShouldThrottleRendering())
CheckDoesNotNeedLayout();
}
void LocalFrameView::AddPartToUpdate(LayoutEmbeddedObject& object) {
DCHECK(IsInPerformLayout());
// Tell the DOM element that it needs a Plugin update.
Node* node = object.GetNode();
DCHECK(node);
if (IsHTMLObjectElement(*node) || IsHTMLEmbedElement(*node))
ToHTMLPlugInElement(node)->SetNeedsPluginUpdate(true);
part_update_set_.insert(&object);
}
void LocalFrameView::SetDisplayMode(WebDisplayMode mode) {
if (mode == display_mode_)
return;
display_mode_ = mode;
if (frame_->GetDocument())
frame_->GetDocument()->MediaQueryAffectingValueChanged();
}
void LocalFrameView::SetDisplayShape(DisplayShape display_shape) {
if (display_shape == display_shape_)
return;
display_shape_ = display_shape;
if (frame_->GetDocument())
frame_->GetDocument()->MediaQueryAffectingValueChanged();
}
void LocalFrameView::SetMediaType(const AtomicString& media_type) {
DCHECK(frame_->GetDocument());
media_type_ = media_type;
frame_->GetDocument()->MediaQueryAffectingValueChanged();
}
AtomicString LocalFrameView::MediaType() const {
// See if we have an override type.
if (frame_->GetSettings() &&
!frame_->GetSettings()->GetMediaTypeOverride().IsEmpty())
return AtomicString(frame_->GetSettings()->GetMediaTypeOverride());
return media_type_;
}
void LocalFrameView::AdjustMediaTypeForPrinting(bool printing) {
if (printing) {
if (media_type_when_not_printing_.IsNull())
media_type_when_not_printing_ = MediaType();
SetMediaType(media_type_names::kPrint);
} else {
if (!media_type_when_not_printing_.IsNull())
SetMediaType(media_type_when_not_printing_);
media_type_when_not_printing_ = g_null_atom;
}
frame_->GetDocument()->SetNeedsStyleRecalc(
kSubtreeStyleChange, StyleChangeReasonForTracing::Create(
style_change_reason::kStyleSheetChange));
}
void LocalFrameView::AddBackgroundAttachmentFixedObject(LayoutObject* object) {
DCHECK(!background_attachment_fixed_objects_.Contains(object));
background_attachment_fixed_objects_.insert(object);
if (ScrollingCoordinator* scrolling_coordinator =
this->GetScrollingCoordinator()) {
scrolling_coordinator
->FrameViewHasBackgroundAttachmentFixedObjectsDidChange(this);
}
// Ensure main thread scrolling reasons are recomputed.
SetNeedsPaintPropertyUpdate();
// The object's scroll properties are not affected by its own background.
object->SetAncestorsNeedPaintPropertyUpdateForMainThreadScrolling();
}
void LocalFrameView::RemoveBackgroundAttachmentFixedObject(
LayoutObject* object) {
DCHECK(background_attachment_fixed_objects_.Contains(object));
background_attachment_fixed_objects_.erase(object);
if (ScrollingCoordinator* scrolling_coordinator =
this->GetScrollingCoordinator()) {
scrolling_coordinator
->FrameViewHasBackgroundAttachmentFixedObjectsDidChange(this);
}
// Ensure main thread scrolling reasons are recomputed.
SetNeedsPaintPropertyUpdate();
// The object's scroll properties are not affected by its own background.
object->SetAncestorsNeedPaintPropertyUpdateForMainThreadScrolling();
}
void LocalFrameView::AddViewportConstrainedObject(LayoutObject& object) {
if (!viewport_constrained_objects_)
viewport_constrained_objects_ = std::make_unique<ObjectSet>();
if (!viewport_constrained_objects_->Contains(&object)) {
viewport_constrained_objects_->insert(&object);
if (ScrollingCoordinator* scrolling_coordinator =
this->GetScrollingCoordinator())
scrolling_coordinator->FrameViewFixedObjectsDidChange(this);
}
}
void LocalFrameView::RemoveViewportConstrainedObject(LayoutObject& object) {
if (viewport_constrained_objects_ &&
viewport_constrained_objects_->Contains(&object)) {
viewport_constrained_objects_->erase(&object);
if (ScrollingCoordinator* scrolling_coordinator =
this->GetScrollingCoordinator())
scrolling_coordinator->FrameViewFixedObjectsDidChange(this);
}
}
void LocalFrameView::ViewportSizeChanged(bool width_changed,
bool height_changed) {
DCHECK(width_changed || height_changed);
DCHECK(frame_->GetPage());
if (frame_->GetDocument() &&
frame_->GetDocument()->Lifecycle().LifecyclePostponed())
return;
auto* layout_view = GetLayoutView();
if (layout_view) {
// If this is the main frame, we might have got here by hiding/showing the
// top controls. In that case, layout won't be triggered, so we need to
// clamp the scroll offset here.
if (GetFrame().IsMainFrame()) {
layout_view->Layer()->UpdateSize();
layout_view->GetScrollableArea()->ClampScrollOffsetAfterOverflowChange();
}
if (layout_view->UsesCompositing()) {
layout_view->Layer()->SetNeedsCompositingInputsUpdate();
SetNeedsPaintPropertyUpdate();
}
}
if (GetFrame().GetDocument())
GetFrame().GetDocument()->GetRootScrollerController().DidResizeFrameView();
// Change of viewport size after browser controls showing/hiding may affect
// painting of the background.
if (layout_view && frame_->IsMainFrame() &&
frame_->GetPage()->GetBrowserControls().TotalHeight())
layout_view->SetShouldCheckForPaintInvalidation();
if (GetFrame().GetDocument() && !IsInPerformLayout())
MarkViewportConstrainedObjectsForLayout(width_changed, height_changed);
}
void LocalFrameView::MarkViewportConstrainedObjectsForLayout(
bool width_changed,
bool height_changed) {
if (!HasViewportConstrainedObjects() || !(width_changed || height_changed))
return;
for (auto* const viewport_constrained_object :
*viewport_constrained_objects_) {
LayoutObject* layout_object = viewport_constrained_object;
const ComputedStyle& style = layout_object->StyleRef();
if (width_changed) {
if (style.Width().IsFixed() &&
(style.Left().IsAuto() || style.Right().IsAuto())) {
layout_object->SetNeedsPositionedMovementLayout();
} else {
layout_object->SetNeedsLayoutAndFullPaintInvalidation(
layout_invalidation_reason::kSizeChanged);
}
}
if (height_changed) {
if (style.Height().IsFixed() &&
(style.Top().IsAuto() || style.Bottom().IsAuto())) {
layout_object->SetNeedsPositionedMovementLayout();
} else {
layout_object->SetNeedsLayoutAndFullPaintInvalidation(
layout_invalidation_reason::kSizeChanged);
}
}
}
}
bool LocalFrameView::ShouldSetCursor() const {
Page* page = GetFrame().GetPage();
return page && page->IsPageVisible() &&
!frame_->GetEventHandler().IsMousePositionUnknown() &&
page->GetFocusController().IsActive();
}
void LocalFrameView::NotifyFrameRectsChangedIfNeededRecursive() {
ForAllNonThrottledLocalFrameViews([](LocalFrameView& frame_view) {
frame_view.NotifyFrameRectsChangedIfNeeded();
});
}
void LocalFrameView::InvalidateBackgroundAttachmentFixedDescendantsOnScroll(
const LayoutObject& scrolled_object) {
for (auto* const layout_object : background_attachment_fixed_objects_) {
if (scrolled_object != GetLayoutView() &&
!layout_object->IsDescendantOf(&scrolled_object))
continue;
// An object needs to be repainted on scroll when it has background-
// attachment:fixed, unless the background will be separately composited
// i.e. when a LayoutView paints backgrounds only into scrolling contents.
if (layout_object == GetLayoutView() &&
GetLayoutView()->GetBackgroundPaintLocation() ==
kBackgroundPaintInScrollingContents &&
(RuntimeEnabledFeatures::CompositeAfterPaintEnabled() ||
GetLayoutView()->Compositor()->PreferCompositingToLCDTextEnabled()))
continue;
layout_object->SetBackgroundNeedsFullPaintInvalidation();
}
}
bool LocalFrameView::HasBackgroundAttachmentFixedDescendants(
const LayoutObject& object) const {
if (object == GetLayoutView())
return !background_attachment_fixed_objects_.IsEmpty();
for (const auto* potential_descendant :
background_attachment_fixed_objects_) {
if (potential_descendant == &object)
continue;
if (potential_descendant->IsDescendantOf(&object))
return true;
}
return false;
}
bool LocalFrameView::InvalidateViewportConstrainedObjects() {
bool fast_path_allowed = true;
for (auto* const viewport_constrained_object :
*viewport_constrained_objects_) {
LayoutObject* layout_object = viewport_constrained_object;
DCHECK(layout_object->StyleRef().HasViewportConstrainedPosition() ||
layout_object->StyleRef().HasStickyConstrainedPosition());
DCHECK(layout_object->HasLayer());
PaintLayer* layer = ToLayoutBoxModelObject(layout_object)->Layer();
if (layer->IsPaintInvalidationContainer())
continue;
// If the layer has no visible content, then we shouldn't invalidate; but
// if we're not compositing-inputs-clean, then we can't query
// layer->SubtreeIsInvisible() here.
layout_object->SetSubtreeShouldCheckForPaintInvalidation();
if (!RuntimeEnabledFeatures::CompositeAfterPaintEnabled() &&
!layer->NeedsRepaint()) {
// Paint properties of the layer relative to its containing graphics
// layer may change if the paint properties escape the graphics layer's
// property state. Need to check raster invalidation for relative paint
// property changes.
if (auto* paint_invalidation_layer =
layer->EnclosingLayerForPaintInvalidation()) {
auto* mapping = paint_invalidation_layer->GetCompositedLayerMapping();
if (!mapping)
mapping = paint_invalidation_layer->GroupedMapping();
if (mapping)
mapping->SetNeedsCheckRasterInvalidation();
}
}
TRACE_EVENT_INSTANT1(
TRACE_DISABLED_BY_DEFAULT("devtools.timeline.invalidationTracking"),
"ScrollInvalidationTracking", TRACE_EVENT_SCOPE_THREAD, "data",
inspector_scroll_invalidation_tracking_event::Data(*layout_object));
// If the fixed layer has a blur/drop-shadow filter applied on at least one
// of its parents, we cannot scroll using the fast path, otherwise the
// outsets of the filter will be moved around the page.
if (layer->HasAncestorWithFilterThatMovesPixels())
fast_path_allowed = false;
}
return fast_path_allowed;
}
void LocalFrameView::ProcessUrlFragment(const KURL& url,
UrlFragmentBehavior behavior) {
// If our URL has no ref, then we have no place we need to jump to.
// OTOH If CSS target was set previously, we want to set it to 0, recalc
// and possibly paint invalidation because :target pseudo class may have been
// set (see bug 11321).
// Similarly for svg, if we had a previous svgView() then we need to reset
// the initial view if we don't have a fragment.
if (!url.HasFragmentIdentifier() && !frame_->GetDocument()->CssTarget() &&
!frame_->GetDocument()->IsSVGDocument())
return;
// Try the raw fragment for HTML documents, but skip it for `svgView()`:
String fragment_identifier = url.FragmentIdentifier();
if (!frame_->GetDocument()->IsSVGDocument() &&
ProcessUrlFragmentHelper(fragment_identifier, behavior)) {
return;
}
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#the-indicated-part-of-the-document
// 5. Let decodedFragment be the result of running UTF-8 decode without BOM on
// fragmentBytes.
String decoded_fragment =
DecodeURLEscapeSequences(fragment_identifier, DecodeURLMode::kUTF8);
// 6. If find a potential indicated element with decodedFragment
// returns non-null, then the return value is the indicated part of
// the document; return.
ProcessUrlFragmentHelper(decoded_fragment, behavior);
}
bool LocalFrameView::ProcessUrlFragmentHelper(const String& name,
UrlFragmentBehavior behavior) {
DCHECK(frame_->GetDocument());
Element* anchor_node;
String selector;
if (RuntimeEnabledFeatures::CSSFragmentIdentifiersEnabled() &&
ParseCSSFragmentIdentifier(name, &selector)) {
anchor_node =
FindCSSFragmentAnchor(AtomicString(selector), frame_->GetDocument());
} else {
anchor_node = frame_->GetDocument()->FindAnchor(name);
}
// Setting to null will clear the current target.
frame_->GetDocument()->SetCSSTarget(anchor_node);
if (frame_->GetDocument()->IsSVGDocument()) {
if (SVGSVGElement* svg =
ToSVGSVGElementOrNull(frame_->GetDocument()->documentElement())) {
svg->SetupInitialView(name, anchor_node);
if (!anchor_node)
return false;
}
// If this is not the top-level frame, then don't scroll to the
// anchor position.
if (!frame_->IsMainFrame())
return false;
}
// Implement the rule that "" and "top" both mean top of page as in other
// browsers.
if (!anchor_node &&
!(name.IsEmpty() || DeprecatedEqualIgnoringCase(name, "top")))
return false;
if (anchor_node)
anchor_node->DispatchActivateInvisibleEventIfNeeded();
if (behavior == kUrlFragmentDontScroll)
return true;
if (!anchor_node) {
fragment_anchor_ = frame_->GetDocument();
needs_focus_on_fragment_ = false;
} else {
fragment_anchor_ = anchor_node;
needs_focus_on_fragment_ = true;
}
// If rendering is blocked, we'll necessarily have a layout to kick off the
// scroll and focus.
if (frame_->GetDocument()->IsRenderingReady()) {
frame_->GetDocument()->UpdateStyleAndLayoutTree();
// If layout is needed, we will scroll in performPostLayoutTasks. Otherwise,
// scroll and focus immediately.
if (NeedsLayout())
UpdateLayout();
else
ScrollAndFocusFragmentAnchor();
}
return true;
}
Element* LocalFrameView::FindCSSFragmentAnchor(const AtomicString& selector,
Document* document) {
DummyExceptionStateForTesting exception_state;
return document->QuerySelector(selector, exception_state);
}
bool LocalFrameView::ParseCSSFragmentIdentifier(const String& fragment,
String* selector) {
size_t pos = fragment.Find(kCssFragmentIdentifierPrefix);
if (pos == 0) {
*selector = fragment.Substring(kCssFragmentIdentifierPrefixLength - 1);
return true;
}
return false;
}
void LocalFrameView::ClearFragmentAnchor() {
fragment_anchor_ = nullptr;
}
void LocalFrameView::SetLayoutSize(const IntSize& size) {
DCHECK(!LayoutSizeFixedToFrameSize());
if (frame_->GetDocument() &&
frame_->GetDocument()->Lifecycle().LifecyclePostponed())
return;
SetLayoutSizeInternal(size);
}
void LocalFrameView::SetLayoutSizeFixedToFrameSize(bool is_fixed) {
if (layout_size_fixed_to_frame_size_ == is_fixed)
return;
layout_size_fixed_to_frame_size_ = is_fixed;
if (is_fixed)
SetLayoutSizeInternal(Size());
}
static cc::LayerSelection ComputeLayerSelection(LocalFrame& frame) {
if (!frame.View() || frame.View()->ShouldThrottleRendering())
return {};
return ComputeLayerSelection(frame.Selection());
}
void LocalFrameView::UpdateCompositedSelectionIfNeeded() {
if (!RuntimeEnabledFeatures::CompositedSelectionUpdateEnabled())
return;
TRACE_EVENT0("blink", "LocalFrameView::updateCompositedSelectionIfNeeded");
Page* page = GetFrame().GetPage();
DCHECK(page);
LocalFrame* focused_frame = page->GetFocusController().FocusedFrame();
LocalFrame* local_frame =
(focused_frame &&
(focused_frame->LocalFrameRoot() == frame_->LocalFrameRoot()))
? focused_frame
: nullptr;
if (local_frame) {
const cc::LayerSelection& selection = ComputeLayerSelection(*local_frame);
if (selection != cc::LayerSelection()) {
page->GetChromeClient().UpdateLayerSelection(local_frame, selection);
return;
}
}
if (!local_frame) {
// Clearing the mainframe when there is no focused frame (and hence
// no localFrame) is legacy behaviour, and implemented here to
// satisfy WebFrameTest.CompositedSelectionBoundsCleared's
// first check that the composited selection has been cleared even
// though no frame has focus yet. If this is not desired, then the
// expectation needs to be removed from the test.
local_frame = &frame_->LocalFrameRoot();
}
DCHECK(local_frame);
page->GetChromeClient().ClearLayerSelection(local_frame);
}
void LocalFrameView::SetNeedsCompositingUpdate(
CompositingUpdateType update_type) {
if (auto* layout_view = GetLayoutView()) {
if (frame_->GetDocument()->IsActive())
layout_view->Compositor()->SetNeedsCompositingUpdate(update_type);
}
}
ChromeClient* LocalFrameView::GetChromeClient() const {
Page* page = GetFrame().GetPage();
if (!page)
return nullptr;
return &page->GetChromeClient();
}
void LocalFrameView::HandleLoadCompleted() {
// Once loading has completed, allow autoSize one last opportunity to
// reduce the size of the frame.
if (auto_size_info_)
auto_size_info_->AutoSizeIfNeeded();
// If there is a pending layout, the fragment anchor will be cleared when it
// finishes.
if (!NeedsLayout())
ClearFragmentAnchor();
}
void LocalFrameView::ClearLayoutSubtreeRoot(const LayoutObject& root) {
layout_subtree_root_list_.Remove(const_cast<LayoutObject&>(root));
}
void LocalFrameView::ClearLayoutSubtreeRootsAndMarkContainingBlocks() {
layout_subtree_root_list_.ClearAndMarkContainingBlocksForLayout();
}
void LocalFrameView::AddOrthogonalWritingModeRoot(LayoutBox& root) {
DCHECK(!root.IsLayoutScrollbarPart());
orthogonal_writing_mode_root_list_.Add(root);
}
void LocalFrameView::RemoveOrthogonalWritingModeRoot(LayoutBox& root) {
orthogonal_writing_mode_root_list_.Remove(root);
}
bool LocalFrameView::HasOrthogonalWritingModeRoots() const {
return !orthogonal_writing_mode_root_list_.IsEmpty();
}
static inline void RemoveFloatingObjectsForSubtreeRoot(LayoutObject& root) {
// TODO(kojii): Under certain conditions, moveChildTo() defers
// removeFloatingObjects() until the containing block layouts. For
// instance, when descendants of the moving child is floating,
// removeChildNode() does not clear them. In such cases, at this
// point, FloatingObjects may contain old or even deleted objects.
// Dealing this in markAllDescendantsWithFloatsForLayout() could
// solve, but since that is likely to suffer the performance and
// since the containing block of orthogonal writing mode roots
// having floats is very rare, prefer to re-create
// FloatingObjects.
if (LayoutBlock* cb = root.ContainingBlock()) {
if ((cb->NormalChildNeedsLayout() || cb->SelfNeedsLayout()) &&
cb->IsLayoutBlockFlow()) {
ToLayoutBlockFlow(cb)->RemoveFloatingObjectsFromDescendants();
}
}
}
static bool PrepareOrthogonalWritingModeRootForLayout(LayoutObject& root) {
DCHECK(root.IsBox() && ToLayoutBox(root).IsOrthogonalWritingModeRoot());
if (!root.NeedsLayout() || root.IsOutOfFlowPositioned() ||
root.IsColumnSpanAll() ||
!root.StyleRef().LogicalHeight().IsIntrinsicOrAuto() ||
ToLayoutBox(root).IsGridItem() || root.IsTablePart())
return false;
// Do not pre-layout objects that are fully managed by LayoutNG; it is not
// necessary and may lead to double layouts. We do need to pre-layout
// objects whose containing block is a legacy object so that it can
// properly compute its intrinsic size.
if (RuntimeEnabledFeatures::LayoutNGEnabled() && IsManagedByLayoutNG(root))
return false;
RemoveFloatingObjectsForSubtreeRoot(root);
return true;
}
void LocalFrameView::LayoutOrthogonalWritingModeRoots() {
for (auto& root : orthogonal_writing_mode_root_list_.Ordered()) {
if (PrepareOrthogonalWritingModeRootForLayout(*root))
LayoutFromRootObject(*root);
}
}
void LocalFrameView::ScheduleOrthogonalWritingModeRootsForLayout() {
for (auto& root : orthogonal_writing_mode_root_list_.Ordered()) {
if (PrepareOrthogonalWritingModeRootForLayout(*root))
layout_subtree_root_list_.Add(*root);
}
}
bool LocalFrameView::CheckLayoutInvalidationIsAllowed() const {
#if DCHECK_IS_ON()
if (allows_layout_invalidation_after_layout_clean_)
return true;
// If we are updating all lifecycle phases beyond LayoutClean, we don't expect
// dirty layout after LayoutClean.
CHECK_FOR_DIRTY_LAYOUT(Lifecycle().GetState() <
DocumentLifecycle::kLayoutClean);
#endif
return true;
}
void LocalFrameView::ScheduleRelayout() {
DCHECK(frame_->View() == this);
if (!layout_scheduling_enabled_)
return;
// TODO(crbug.com/590856): It's still broken when we choose not to crash when
// the check fails.
if (!CheckLayoutInvalidationIsAllowed())
return;
if (!NeedsLayout())
return;
if (!frame_->GetDocument()->ShouldScheduleLayout())
return;
TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"),
"InvalidateLayout", TRACE_EVENT_SCOPE_THREAD, "data",
inspector_invalidate_layout_event::Data(frame_.Get()));
ClearLayoutSubtreeRootsAndMarkContainingBlocks();
if (has_pending_layout_)
return;
has_pending_layout_ = true;
if (!ShouldThrottleRendering())
GetPage()->Animator().ScheduleVisualUpdate(frame_.Get());
}
void LocalFrameView::ScheduleRelayoutOfSubtree(LayoutObject* relayout_root) {
DCHECK(frame_->View() == this);
// TODO(crbug.com/590856): It's still broken when we choose not to crash when
// the check fails.
if (!CheckLayoutInvalidationIsAllowed())
return;
// FIXME: Should this call shouldScheduleLayout instead?
if (!frame_->GetDocument()->IsActive())
return;
LayoutView* layout_view = this->GetLayoutView();
if (layout_view && layout_view->NeedsLayout()) {
if (relayout_root)
relayout_root->MarkContainerChainForLayout(false);
return;
}
if (relayout_root == layout_view)
layout_subtree_root_list_.ClearAndMarkContainingBlocksForLayout();
else
layout_subtree_root_list_.Add(*relayout_root);
if (layout_scheduling_enabled_) {
has_pending_layout_ = true;
if (!ShouldThrottleRendering())
GetPage()->Animator().ScheduleVisualUpdate(frame_.Get());
Lifecycle().EnsureStateAtMost(DocumentLifecycle::kStyleClean);
}
TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"),
"InvalidateLayout", TRACE_EVENT_SCOPE_THREAD, "data",
inspector_invalidate_layout_event::Data(frame_.Get()));
}
bool LocalFrameView::LayoutPending() const {
// FIXME: This should check Document::lifecycle instead.
return has_pending_layout_;
}
bool LocalFrameView::IsInPerformLayout() const {
return Lifecycle().GetState() == DocumentLifecycle::kInPerformLayout;
}
bool LocalFrameView::NeedsLayout() const {
// This can return true in cases where the document does not have a body yet.
// Document::shouldScheduleLayout takes care of preventing us from scheduling
// layout in that case.
auto* layout_view = GetLayoutView();
return LayoutPending() || (layout_view && layout_view->NeedsLayout()) ||
IsSubtreeLayout();
}
NOINLINE bool LocalFrameView::CheckDoesNotNeedLayout() const {
CHECK_FOR_DIRTY_LAYOUT(!LayoutPending());
CHECK_FOR_DIRTY_LAYOUT(!GetLayoutView() || !GetLayoutView()->NeedsLayout());
CHECK_FOR_DIRTY_LAYOUT(!IsSubtreeLayout());
return true;
}
void LocalFrameView::SetNeedsLayout() {
auto* layout_view = GetLayoutView();
if (!layout_view)
return;
// TODO(crbug.com/590856): It's still broken if we choose not to crash when
// the check fails.
if (!CheckLayoutInvalidationIsAllowed())
return;
layout_view->SetNeedsLayout(layout_invalidation_reason::kUnknown);
}
bool LocalFrameView::HasOpaqueBackground() const {
return !base_background_color_.HasAlpha();
}
Color LocalFrameView::BaseBackgroundColor() const {
return base_background_color_;
}
void LocalFrameView::SetBaseBackgroundColor(const Color& background_color) {
if (base_background_color_ == background_color)
return;
base_background_color_ = background_color;
if (auto* layout_view = GetLayoutView()) {
if (layout_view->Layer()->HasCompositedLayerMapping()) {
CompositedLayerMapping* composited_layer_mapping =
layout_view->Layer()->GetCompositedLayerMapping();
composited_layer_mapping->UpdateContentsOpaque();
if (composited_layer_mapping->MainGraphicsLayer())
composited_layer_mapping->MainGraphicsLayer()->SetNeedsDisplay();
if (composited_layer_mapping->ScrollingContentsLayer())
composited_layer_mapping->ScrollingContentsLayer()->SetNeedsDisplay();
}
}
if (!ShouldThrottleRendering())
GetPage()->Animator().ScheduleVisualUpdate(frame_.Get());
}
void LocalFrameView::UpdateBaseBackgroundColorRecursively(
const Color& base_background_color) {
ForAllNonThrottledLocalFrameViews(
[base_background_color](LocalFrameView& frame_view) {
frame_view.SetBaseBackgroundColor(base_background_color);
});
}
void LocalFrameView::ScrollAndFocusFragmentAnchor() {
Node* anchor_node = fragment_anchor_;
if (!anchor_node)
return;
if (!frame_->GetDocument()->IsRenderingReady())
return;
if (anchor_node->GetLayoutObject()) {
LayoutRect rect;
if (anchor_node != frame_->GetDocument()) {
rect = anchor_node->BoundingBoxForScrollIntoView();
} else {
if (Element* document_element = frame_->GetDocument()->documentElement())
rect = document_element->BoundingBoxForScrollIntoView();
}
Frame* boundary_frame = frame_->FindUnsafeParentScrollPropagationBoundary();
// FIXME: Handle RemoteFrames
if (boundary_frame && boundary_frame->IsLocalFrame()) {
ToLocalFrame(boundary_frame)
->View()
->SetSafeToPropagateScrollToParent(false);
}
Element* anchor_element = anchor_node->IsElementNode()
? ToElement(anchor_node)
: frame_->GetDocument()->documentElement();
if (anchor_element) {
ScrollIntoViewOptions* options = ScrollIntoViewOptions::Create();
options->setBlock("start");
options->setInlinePosition("nearest");
anchor_element->ScrollIntoViewNoVisualUpdate(options);
}
if (boundary_frame && boundary_frame->IsLocalFrame()) {
ToLocalFrame(boundary_frame)
->View()
->SetSafeToPropagateScrollToParent(true);
}
if (AXObjectCache* cache = frame_->GetDocument()->ExistingAXObjectCache())
cache->HandleScrolledToAnchor(anchor_node);
// If the anchor accepts keyboard focus and fragment scrolling is allowed,
// move focus there to aid users relying on keyboard navigation.
// If anchorNode is not focusable or fragment scrolling is not allowed,
// clear focus, which matches the behavior of other browsers.
if (needs_focus_on_fragment_) {
if (anchor_node->IsElementNode() &&
ToElement(anchor_node)->IsFocusable()) {
ToElement(anchor_node)->focus();
} else {
frame_->GetDocument()->SetSequentialFocusNavigationStartingPoint(
anchor_node);
frame_->GetDocument()->ClearFocusedElement();
}
needs_focus_on_fragment_ = false;
}
}
// The fragment anchor should only be maintained while the frame is still
// loading. If the frame is done loading, clear the anchor now. Otherwise,
// restore it since it may have been cleared during scrollRectToVisible.
fragment_anchor_ =
frame_->GetDocument()->IsLoadCompleted() ? nullptr : anchor_node;
}
bool LocalFrameView::UpdatePlugins() {
// This is always called from UpdatePluginsTimerFired.
// update_plugins_timer should only be scheduled if we have FrameViews to
// update. Thus I believe we can stop checking isEmpty here, and just ASSERT
// isEmpty:
// FIXME: This assert has been temporarily removed due to
// https://crbug.com/430344
if (nested_layout_count_ > 1 || part_update_set_.IsEmpty())
return true;
// Need to swap because script will run inside the below loop and invalidate
// the iterator.
EmbeddedObjectSet objects;
objects.swap(part_update_set_);
for (const auto& embedded_object : objects) {
LayoutEmbeddedObject& object = *embedded_object;
HTMLPlugInElement* element = ToHTMLPlugInElement(object.GetNode());
// The object may have already been destroyed (thus node cleared),
// but LocalFrameView holds a manual ref, so it won't have been deleted.
if (!element)
continue;
// No need to update if it's already crashed or known to be missing.
if (object.ShowsUnavailablePluginIndicator())
continue;
if (element->NeedsPluginUpdate())
element->UpdatePlugin();
if (EmbeddedContentView* view = element->OwnedEmbeddedContentView())
view->UpdateGeometry();
// Prevent plugins from causing infinite updates of themselves.
// FIXME: Do we really need to prevent this?
part_update_set_.erase(&object);
}
return part_update_set_.IsEmpty();
}
void LocalFrameView::UpdatePluginsTimerFired(TimerBase*) {
DCHECK(!IsInPerformLayout());
for (unsigned i = 0; i < kMaxUpdatePluginsIterations; ++i) {
if (UpdatePlugins())
return;
}
}
void LocalFrameView::FlushAnyPendingPostLayoutTasks() {
DCHECK(!IsInPerformLayout());
if (update_plugins_timer_.IsActive()) {
update_plugins_timer_.Stop();
UpdatePluginsTimerFired(nullptr);
}
}
void LocalFrameView::ScheduleUpdatePluginsIfNecessary() {
DCHECK(!IsInPerformLayout());
if (update_plugins_timer_.IsActive() || part_update_set_.IsEmpty())
return;
update_plugins_timer_.StartOneShot(TimeDelta(), FROM_HERE);
}
void LocalFrameView::PerformPostLayoutTasks() {
// FIXME: We can reach here, even when the page is not active!
// http/tests/inspector/elements/html-link-import.html and many other
// tests hit that case.
// We should DCHECK(isActive()); or at least return early if we can!
// Always called before or after performLayout(), part of the highest-level
// layout() call.
DCHECK(!IsInPerformLayout());
TRACE_EVENT0("blink,benchmark", "LocalFrameView::performPostLayoutTasks");
frame_->Selection().DidLayout();
DCHECK(frame_->GetDocument());
FontFaceSetDocument::DidLayout(*frame_->GetDocument());
// Fire a fake a mouse move event to update hover state and mouse cursor, and
// send the right mouse out/over events.
frame_->GetEventHandler().MayUpdateHoverWhenContentUnderMouseChanged(
MouseEventManager::UpdateHoverReason::kLayoutOrStyleChanged);
UpdateGeometriesIfNeeded();
// Plugins could have torn down the page inside updateGeometries().
if (!GetLayoutView())
return;
ScheduleUpdatePluginsIfNecessary();
if (ScrollingCoordinator* scrolling_coordinator =
this->GetScrollingCoordinator()) {
scrolling_coordinator->NotifyGeometryChanged(this);
}
if (SnapCoordinator* snap_coordinator =
frame_->GetDocument()->GetSnapCoordinator())
snap_coordinator->UpdateAllSnapContainerData();
SendResizeEventIfNeeded();
}
bool LocalFrameView::WasViewportResized() {
DCHECK(frame_);
auto* layout_view = GetLayoutView();
if (!layout_view)
return false;
return (GetLayoutSize() != last_viewport_size_ ||
layout_view->StyleRef().Zoom() != last_zoom_factor_);
}
void LocalFrameView::SendResizeEventIfNeeded() {
DCHECK(frame_);
auto* layout_view = GetLayoutView();
if (!layout_view || layout_view->GetDocument().Printing())
return;
if (!WasViewportResized())
return;
last_viewport_size_ = GetLayoutSize();
last_zoom_factor_ = layout_view->StyleRef().Zoom();
frame_->GetDocument()->EnqueueVisualViewportResizeEvent();
frame_->GetDocument()->EnqueueResizeEvent();
if (frame_->IsMainFrame())
probe::didResizeMainFrame(frame_.Get());
}
void LocalFrameView::SetInputEventsScaleForEmulation(
float content_scale_factor) {
input_events_scale_factor_for_emulation_ = content_scale_factor;
}
float LocalFrameView::InputEventsScaleFactor() const {
float page_scale = frame_->GetPage()->GetVisualViewport().Scale();
return page_scale * input_events_scale_factor_for_emulation_;
}
void LocalFrameView::NotifyPageThatContentAreaWillPaint() const {
Page* page = frame_->GetPage();
if (!page)
return;
if (!scrollable_areas_)
return;
for (const auto& scrollable_area : *scrollable_areas_) {
if (!scrollable_area->ScrollbarsCanBeActive())
continue;
scrollable_area->ContentAreaWillPaint();
}
}
void LocalFrameView::UpdateDocumentAnnotatedRegions() const {
Document* document = frame_->GetDocument();
if (!document->HasAnnotatedRegions())
return;
Vector<AnnotatedRegionValue> new_regions;
CollectAnnotatedRegions(*(document->GetLayoutBox()), new_regions);
if (new_regions == document->AnnotatedRegions())
return;
document->SetAnnotatedRegions(new_regions);
DCHECK(frame_->Client());
frame_->Client()->AnnotatedRegionsChanged();
}
void LocalFrameView::DidAttachDocument() {
Page* page = frame_->GetPage();
DCHECK(page);
DCHECK(frame_->GetDocument());
if (frame_->IsMainFrame()) {
ScrollableArea& visual_viewport = frame_->GetPage()->GetVisualViewport();
ScrollableArea* layout_viewport = LayoutViewport();
DCHECK(layout_viewport);
RootFrameViewport* root_frame_viewport =
RootFrameViewport::Create(visual_viewport, *layout_viewport);
viewport_scrollable_area_ = root_frame_viewport;
page->GlobalRootScrollerController().InitializeViewportScrollCallback(
*root_frame_viewport, *frame_->GetDocument());
}
}
Color LocalFrameView::DocumentBackgroundColor() const {
// The LayoutView's background color is set in
// Document::inheritHtmlAndBodyElementStyles. Blend this with the base
// background color of the LocalFrameView. This should match the color drawn
// by ViewPainter::paintBoxDecorationBackground.
Color result = BaseBackgroundColor();
// If we have a fullscreen element grab the fullscreen color from the
// backdrop.
if (Document* doc = frame_->GetDocument()) {
if (Element* element = Fullscreen::FullscreenElementFrom(*doc)) {
if (LayoutObject* layout_object =
element->PseudoElementLayoutObject(kPseudoIdBackdrop)) {
return result.Blend(
layout_object->ResolveColor(GetCSSPropertyBackgroundColor()));
}
}
}
auto* layout_view = GetLayoutView();
if (layout_view) {
result = result.Blend(
layout_view->ResolveColor(GetCSSPropertyBackgroundColor()));
}
return result;
}
void LocalFrameView::WillBeRemovedFromFrame() {
if (paint_artifact_compositor_)
paint_artifact_compositor_->WillBeRemovedFromFrame();
}
LocalFrameView* LocalFrameView::ParentFrameView() const {
if (!is_attached_)
return nullptr;
Frame* parent_frame = frame_->Tree().Parent();
if (parent_frame && parent_frame->IsLocalFrame())
return ToLocalFrame(parent_frame)->View();
return nullptr;
}
void LocalFrameView::VisualViewportScrollbarsChanged() {
if (LayoutView* layout_view = GetLayoutView())
layout_view->Layer()->ClearClipRects();
}
void LocalFrameView::UpdateGeometriesIfNeeded() {
if (!needs_update_geometries_)
return;
needs_update_geometries_ = false;
HeapVector<Member<EmbeddedContentView>> views;
ForAllChildViewsAndPlugins(
[&](EmbeddedContentView& view) { views.push_back(view); });
for (const auto& view : views) {
// Script or plugins could detach the frame so abort processing if that
// happens.
if (!GetLayoutView())
break;
view->UpdateGeometry();
}
}
void LocalFrameView::UpdateAllLifecyclePhases(
DocumentLifecycle::LifecycleUpdateReason reason) {
GetFrame().LocalFrameRoot().View()->UpdateLifecyclePhases(
DocumentLifecycle::kPaintClean, reason);
}
// TODO(schenney): add a scrolling update lifecycle phase.
// TODO(schenney): Pass a LifecycleUpdateReason in here
bool LocalFrameView::UpdateLifecycleToCompositingCleanPlusScrolling() {
if (RuntimeEnabledFeatures::CompositeAfterPaintEnabled())
return UpdateAllLifecyclePhasesExceptPaint();
return GetFrame().LocalFrameRoot().View()->UpdateLifecyclePhases(
DocumentLifecycle::kCompositingClean,
DocumentLifecycle::LifecycleUpdateReason::kOther);
}
// TODO(schenney): Pass a LifecycleUpdateReason in here
bool LocalFrameView::UpdateLifecycleToCompositingInputsClean() {
// When CAP is enabled, the standard compositing lifecycle steps do not
// exist; compositing is done after paint instead.
DCHECK(!RuntimeEnabledFeatures::CompositeAfterPaintEnabled());
return GetFrame().LocalFrameRoot().View()->UpdateLifecyclePhases(
DocumentLifecycle::kCompositingInputsClean,
DocumentLifecycle::LifecycleUpdateReason::kOther);
}
// TODO(schenney): Pass a LifecycleUpdateReason in here
bool LocalFrameView::UpdateAllLifecyclePhasesExceptPaint() {
return GetFrame().LocalFrameRoot().View()->UpdateLifecyclePhases(
DocumentLifecycle::kPrePaintClean,
DocumentLifecycle::LifecycleUpdateReason::kOther);
}
void LocalFrameView::UpdateLifecyclePhasesForPrinting() {
auto* local_frame_view_root = GetFrame().LocalFrameRoot().View();
local_frame_view_root->UpdateLifecyclePhases(
DocumentLifecycle::kPrePaintClean,
DocumentLifecycle::LifecycleUpdateReason::kOther);
auto* detached_frame_view = this;
while (detached_frame_view->is_attached_ &&
detached_frame_view != local_frame_view_root)
detached_frame_view = detached_frame_view->parent_.Get();
if (detached_frame_view == local_frame_view_root)
return;
DCHECK(!detached_frame_view->is_attached_);
// We are printing a detached frame or a descendant of a detached frame which
// was not reached in some phases during during |local_frame_view_root->
// UpdateLifecyclePhasesnormal()|. We need the subtree to be ready for
// painting.
detached_frame_view->UpdateLifecyclePhases(
DocumentLifecycle::kPrePaintClean,
DocumentLifecycle::LifecycleUpdateReason::kOther);
}
// TODO(schenney): Pass a LifecycleUpdateReason in here
bool LocalFrameView::UpdateLifecycleToLayoutClean() {
return GetFrame().LocalFrameRoot().View()->UpdateLifecyclePhases(
DocumentLifecycle::kLayoutClean,
DocumentLifecycle::LifecycleUpdateReason::kOther);
}
void LocalFrameView::RecordEndOfFrameMetrics(base::TimeTicks frame_begin_time) {
LocalFrameUkmAggregator& ukm_aggregator = EnsureUkmAggregator();
ukm_aggregator.RecordEndOfFrameMetrics(frame_begin_time, CurrentTimeTicks());
}
void LocalFrameView::ScheduleVisualUpdateForPaintInvalidationIfNeeded() {
LocalFrame& local_frame_root = GetFrame().LocalFrameRoot();
if (local_frame_root.View()->current_update_lifecycle_phases_target_state_ <
DocumentLifecycle::kPrePaintClean ||
Lifecycle().GetState() >= DocumentLifecycle::kPrePaintClean) {
// Schedule visual update to process the paint invalidation in the next
// cycle.
local_frame_root.ScheduleVisualUpdateUnlessThrottled();
}
// Otherwise the paint invalidation will be handled in the pre-paint
// phase of this cycle.
}
void LocalFrameView::NotifyResizeObservers() {
// Controller exists only if ResizeObserver was created.
if (!GetFrame().GetDocument()->GetResizeObserverController())
return;
ResizeObserverController& resize_controller =
frame_->GetDocument()->EnsureResizeObserverController();
DCHECK(Lifecycle().GetState() >= DocumentLifecycle::kLayoutClean);
size_t min_depth = 0;
for (min_depth = resize_controller.GatherObservations(0);
min_depth != ResizeObserverController::kDepthBottom;
min_depth = resize_controller.GatherObservations(min_depth)) {
resize_controller.DeliverObservations();
GetFrame().GetDocument()->UpdateStyleAndLayout();
}
if (resize_controller.SkippedObservations()) {
resize_controller.ClearObservations();
ErrorEvent* error = ErrorEvent::Create(
"ResizeObserver loop limit exceeded",
SourceLocation::Capture(frame_->GetDocument()), nullptr);
// We're using |SanitizeScriptErrors::kDoNotSanitize| as the error is made
// by blink itself.
// TODO(yhirano): Reconsider this.
frame_->GetDocument()->DispatchErrorEvent(
error, SanitizeScriptErrors::kDoNotSanitize);
// Ensure notifications will get delivered in next cycle.
ScheduleAnimation();
}
DCHECK(!GetLayoutView()->NeedsLayout());
}
void LocalFrameView::DispatchEventsForPrintingOnAllFrames() {
DCHECK(frame_->IsMainFrame());
for (Frame* current_frame = frame_; current_frame;
current_frame = current_frame->Tree().TraverseNext(frame_)) {
if (current_frame->IsLocalFrame())
ToLocalFrame(current_frame)->GetDocument()->DispatchEventsForPrinting();
}
}
void LocalFrameView::SetupPrintContext() {
if (frame_->GetDocument()->Printing())
return;
if (!print_context_) {
print_context_ = MakeGarbageCollected<PrintContext>(
frame_, /*use_printing_layout=*/true);
}
if (frame_->GetSettings())
frame_->GetSettings()->SetShouldPrintBackgrounds(true);
bool is_us = DefaultLanguage() == "en-US";
int width = is_us ? kLetterPortraitPageWidth : kA4PortraitPageWidth;
int height = is_us ? kLetterPortraitPageHeight : kA4PortraitPageHeight;
print_context_->BeginPrintMode(width, height);
print_context_->ComputePageRects(FloatSize(width, height));
DispatchEventsForPrintingOnAllFrames();
}
void LocalFrameView::ClearPrintContext() {
if (!print_context_)
return;
print_context_->EndPrintMode();
print_context_.Clear();
}
// TODO(leviw): We don't assert lifecycle information from documents in child
// WebPluginContainerImpls.
bool LocalFrameView::UpdateLifecyclePhases(
DocumentLifecycle::LifecycleState target_state,
DocumentLifecycle::LifecycleUpdateReason reason) {
// If the lifecycle is postponed, which can happen if the inspector requests
// it, then we shouldn't update any lifecycle phases.
if (UNLIKELY(frame_->GetDocument() &&
frame_->GetDocument()->Lifecycle().LifecyclePostponed())) {
return false;
}
// Prevent reentrance.
// TODO(vmpstr): Should we just have a DCHECK instead here?
if (UNLIKELY(current_update_lifecycle_phases_target_state_ !=
DocumentLifecycle::kUninitialized)) {
NOTREACHED()
<< "LocalFrameView::updateLifecyclePhasesInternal() reentrance";
return false;
}
// This must be called from the root frame, or a detached frame for printing,
// since it recurses down, not up. Otherwise the lifecycles of the frames
// might be out of sync.
DCHECK(frame_->IsLocalRoot() || !is_attached_);
// Only the following target states are supported.
DCHECK(target_state == DocumentLifecycle::kLayoutClean ||
target_state == DocumentLifecycle::kCompositingInputsClean ||
target_state == DocumentLifecycle::kCompositingClean ||
target_state == DocumentLifecycle::kPrePaintClean ||
target_state == DocumentLifecycle::kPaintClean);
lifecycle_update_count_for_testing_++;
// If the document is not active then it is either not yet initialized, or it
// is stopping. In either case, we can't reach one of the supported target
// states.
if (!frame_->GetDocument()->IsActive())
return false;
// This is used to guard against reentrance. It is also used in conjunction
// with the current lifecycle state to determine which phases are yet to run
// in this cycle.
base::AutoReset<DocumentLifecycle::LifecycleState> target_state_scope(
&current_update_lifecycle_phases_target_state_, target_state);
// This is used to check if we're within a lifecycle update but have passed
// the layout update phase. Note there is a bit of a subtlety here: it's not
// sufficient for us to check the current lifecycle state, since it can be
// past kLayoutClean but the function to run style and layout phase has not
// actually been run yet. Since this bool affects throttling, and throttling,
// in turn, determines whether style and layout function will run, we need a
// separate bool.
base::AutoReset<bool> past_layout_lifecycle_resetter(
&past_layout_lifecycle_update_, false);
// If we're throttling, then we don't need to update lifecycle phases, only
// the throttling status.
if (ShouldThrottleRendering()) {
UpdateThrottlingStatusForSubtree();
return Lifecycle().GetState() == target_state;
}
if (reason == DocumentLifecycle::LifecycleUpdateReason::kBeginMainFrame)
EnsureUkmAggregator().BeginMainFrame();
for (auto& observer : lifecycle_observers_)
observer->WillStartLifecycleUpdate();
// If we're in PrintBrowser mode, setup a print context.
// TODO(vmpstr): It doesn't seem like we need to do this every lifecycle
// update, but rather once somewhere at creation time.
if (RuntimeEnabledFeatures::PrintBrowserEnabled())
SetupPrintContext();
else
ClearPrintContext();
// Run the lifecycle updates.
UpdateLifecyclePhasesInternal(target_state);
// Update intersection observations if needed.
if (target_state == DocumentLifecycle::kPaintClean) {
TRACE_EVENT0("blink,benchmark",
"LocalFrameView::UpdateViewportIntersectionsForSubtree");
SCOPED_UMA_AND_UKM_TIMER(EnsureUkmAggregator(),
LocalFrameUkmAggregator::kIntersectionObservation);
UpdateViewportIntersectionsForSubtree();
}
UpdateThrottlingStatusForSubtree();
for (auto& observer : lifecycle_observers_)
observer->DidFinishLifecycleUpdate();
return Lifecycle().GetState() == target_state;
}
void LocalFrameView::UpdateLifecyclePhasesInternal(
DocumentLifecycle::LifecycleState target_state) {
bool run_more_lifecycle_phases =
RunStyleAndLayoutLifecyclePhases(target_state);
if (!run_more_lifecycle_phases)
return;
DCHECK(Lifecycle().GetState() >= DocumentLifecycle::kLayoutClean);
if (!GetLayoutView())
return;
#if DCHECK_IS_ON()
DisallowLayoutInvalidationScope disallow_layout_invalidation(this);
#endif
{
TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"),
"SetLayerTreeId", TRACE_EVENT_SCOPE_THREAD, "data",
inspector_set_layer_tree_id::Data(frame_.Get()));
TRACE_EVENT1("devtools.timeline", "UpdateLayerTree", "data",
inspector_update_layer_tree_event::Data(frame_.Get()));
run_more_lifecycle_phases = RunCompositingLifecyclePhase(target_state);
if (!run_more_lifecycle_phases)
return;
// TODO(pdr): PrePaint should be under the "Paint" devtools timeline step
// when CompositeAfterPaint is enabled.
run_more_lifecycle_phases = RunPrePaintLifecyclePhase(target_state);
DCHECK(ShouldThrottleRendering() ||
Lifecycle().GetState() >= DocumentLifecycle::kPrePaintClean);
if (!run_more_lifecycle_phases)
return;
}
DCHECK_EQ(target_state, DocumentLifecycle::kPaintClean);
RunPaintLifecyclePhase();
DCHECK(ShouldThrottleRendering() ||
(frame_->GetDocument()->Printing() &&
!RuntimeEnabledFeatures::PrintBrowserEnabled()) ||
Lifecycle().GetState() == DocumentLifecycle::kPaintClean);
}
bool LocalFrameView::RunStyleAndLayoutLifecyclePhases(
DocumentLifecycle::LifecycleState target_state) {
TRACE_EVENT0("blink,benchmark",
"LocalFrameView::RunStyleAndLayoutLifecyclePhases");
{
SCOPED_UMA_AND_UKM_TIMER(EnsureUkmAggregator(),
LocalFrameUkmAggregator::kStyleAndLayout);
UpdateStyleAndLayoutIfNeededRecursive();
}
DCHECK(Lifecycle().GetState() >= DocumentLifecycle::kLayoutClean);
frame_->GetDocument()
->GetRootScrollerController()
.PerformRootScrollerSelection();
// PerformRootScrollerSelection can dirty layout if an effective root
// scroller is changed so make sure we get back to LayoutClean.
if (RuntimeEnabledFeatures::ImplicitRootScrollerEnabled() ||
RuntimeEnabledFeatures::SetRootScrollerEnabled()) {
ForAllNonThrottledLocalFrameViews([](LocalFrameView& frame_view) {
if (frame_view.NeedsLayout())
frame_view.UpdateLayout();
DCHECK(frame_view.Lifecycle().GetState() >=
DocumentLifecycle::kLayoutClean);
});
}
if (target_state == DocumentLifecycle::kLayoutClean)
return false;
// This will be reset by AutoReset in the calling function
// (UpdateLifecyclePhases()).
past_layout_lifecycle_update_ = true;
// After layout and the |past_layout_lifecycle_update_| update, the value of
// ShouldThrottleRendering() can change. OOPIF local frame roots that are
// throttled can return now that layout is clean. This situation happens if
// the throttling was disabled due to required intersection observation, which
// can now be run.
if (ShouldThrottleRendering())
return false;
// Now we can run post layout steps in preparation for further phases.
ForAllNonThrottledLocalFrameViews([](LocalFrameView& frame_view) {
frame_view.PerformScrollAnchoringAdjustments();
});
frame_->GetPage()->GetValidationMessageClient().LayoutOverlay();
frame_->UpdateFrameColorOverlay();
ForAllChildLocalFrameViews(
[](LocalFrameView& view) { view.frame_->UpdateFrameColorOverlay(); });
if (target_state == DocumentLifecycle::kPaintClean) {
ForAllNonThrottledLocalFrameViews(
[](LocalFrameView& frame_view) { frame_view.NotifyResizeObservers(); });
NotifyFrameRectsChangedIfNeededRecursive();
}
// If we exceed the number of re-layouts during ResizeObserver notifications,
// then we shouldn't continue with the lifecycle updates. At that time, we
// have scheduled an animation and we'll try again.
DCHECK(Lifecycle().GetState() >= DocumentLifecycle::kLayoutClean ||
Lifecycle().GetState() == DocumentLifecycle::kVisualUpdatePending);
return Lifecycle().GetState() >= DocumentLifecycle::kLayoutClean;
}
bool LocalFrameView::RunCompositingLifecyclePhase(
DocumentLifecycle::LifecycleState target_state) {
TRACE_EVENT0("blink,benchmark",
"LocalFrameView::RunCompositingLifecyclePhase");
auto* layout_view = GetLayoutView();
DCHECK(layout_view);
if (!RuntimeEnabledFeatures::CompositeAfterPaintEnabled()) {
SCOPED_UMA_AND_UKM_TIMER(EnsureUkmAggregator(),
LocalFrameUkmAggregator::kCompositing);
layout_view->Compositor()->UpdateIfNeededRecursive(target_state);
} else {
ForAllNonThrottledLocalFrameViews([](LocalFrameView& frame_view) {
frame_view.GetLayoutView()->Layer()->UpdateDescendantDependentFlags();
frame_view.GetLayoutView()->CommitPendingSelection();
});
}
// We may be in kCompositingInputsClean clean, which does not need to notify
// the global root scroller controller.
if (target_state >= DocumentLifecycle::kCompositingClean) {
frame_->GetPage()->GlobalRootScrollerController().DidUpdateCompositing(
*this);
}
// We need to run more phases only if the target is beyond kCompositingClean.
if (target_state > DocumentLifecycle::kCompositingClean) {
// TODO(vmpstr): Why is composited selection only updated if we're moving
// past kCompositingClean?
UpdateCompositedSelectionIfNeeded();
return true;
}
return false;
}
bool LocalFrameView::RunPrePaintLifecyclePhase(
DocumentLifecycle::LifecycleState target_state) {
TRACE_EVENT0("blink,benchmark", "LocalFrameView::RunPrePaintLifecyclePhase");
ForAllNonThrottledLocalFrameViews([](LocalFrameView& frame_view) {
frame_view.Lifecycle().AdvanceTo(DocumentLifecycle::kInPrePaint);
if (frame_view.CanThrottleRendering()) {
// This frame can be throttled but not throttled, meaning we are not in an
// AllowThrottlingScope. Now this frame may contain dirty paint flags, and
// we need to propagate the flags into the ancestor chain so that
// PrePaintTreeWalk can reach this frame.
frame_view.SetNeedsPaintPropertyUpdate();
if (auto* owner = frame_view.GetFrame().OwnerLayoutObject())
owner->SetShouldCheckForPaintInvalidation();
}
});
{
SCOPED_UMA_AND_UKM_TIMER(EnsureUkmAggregator(),
LocalFrameUkmAggregator::kPrePaint);
PrePaintTreeWalk().WalkTree(*this);
}
ForAllNonThrottledLocalFrameViews([](LocalFrameView& frame_view) {
frame_view.Lifecycle().AdvanceTo(DocumentLifecycle::kPrePaintClean);
});
return target_state > DocumentLifecycle::kPrePaintClean;
}
template <typename Function>
static void ForAllGraphicsLayers(GraphicsLayer& layer,
const Function& function) {
function(layer);
for (auto* child : layer.Children())
ForAllGraphicsLayers(*child, function);
}
void LocalFrameView::RunPaintLifecyclePhase() {
TRACE_EVENT0("blink,benchmark", "LocalFrameView::RunPaintLifecyclePhase");
// While printing a document, the paint walk is done by the printing
// component into a special canvas. There is no point doing a normal paint
// step (or animations update for BlinkGenPropertyTrees/CAP) when in this
// mode.
//
// RuntimeEnabledFeatures::PrintBrowserEnabled is a mode which runs the
// browser normally, but renders every page as if it were being printed.
// See crbug.com/667547
bool print_mode_enabled = frame_->GetDocument()->Printing() &&
!RuntimeEnabledFeatures::PrintBrowserEnabled();
if (!print_mode_enabled)
PaintTree();
if (!RuntimeEnabledFeatures::CompositeAfterPaintEnabled()) {
if (GetLayoutView()->Compositor()->InCompositingMode()) {
GetScrollingCoordinator()->UpdateAfterPaint(this);
}
}
if (RuntimeEnabledFeatures::CompositeAfterPaintEnabled() ||
RuntimeEnabledFeatures::BlinkGenPropertyTreesEnabled()) {
if (!print_mode_enabled) {
base::Optional<CompositorElementIdSet> composited_element_ids =
CompositorElementIdSet();
PushPaintArtifactToCompositor(composited_element_ids.value());
// TODO(pdr): Add call to UpdateCompositorScrollAnimations here.
ForAllNonThrottledLocalFrameViews(
[&composited_element_ids](LocalFrameView& frame_view) {
DocumentAnimations::UpdateAnimations(
frame_view.GetLayoutView()->GetDocument(),
DocumentLifecycle::kPaintClean, composited_element_ids);
});
// Notify the controller that the artifact has been pushed and some
// lifecycle state can be freed (such as raster invalidations).
paint_controller_->FinishCycle();
// PaintController for BlinkGenPropertyTrees is transient.
if (RuntimeEnabledFeatures::BlinkGenPropertyTreesEnabled() &&
!RuntimeEnabledFeatures::CompositeAfterPaintEnabled()) {
// Property tree changed state is typically cleared through
// |PaintController::FinishCycle| but that will be a no-op because
// the paint controller is transient, so force the changed state to be
// cleared here.
paint_controller_->ClearPropertyTreeChangedStateTo(
PropertyTreeState::Root());
auto* root = GetLayoutView()->Compositor()->PaintRootGraphicsLayer();
if (root) {
ForAllGraphicsLayers(*root, [](GraphicsLayer& layer) {
if (layer.DrawsContent() && layer.HasLayerState()) {
layer.GetPaintController().ClearPropertyTreeChangedStateTo(
layer.GetPropertyTreeState());
}
});
}
paint_controller_ = nullptr;
}
}
}
}
void LocalFrameView::EnqueueScrollAnchoringAdjustment(
ScrollableArea* scrollable_area) {
anchoring_adjustment_queue_.insert(scrollable_area);
}
void LocalFrameView::DequeueScrollAnchoringAdjustment(
ScrollableArea* scrollable_area) {
anchoring_adjustment_queue_.erase(scrollable_area);
}
void LocalFrameView::PerformScrollAnchoringAdjustments() {
// Adjust() will cause a scroll which could end up causing a layout and
// reentering this method. Copy and clear the queue so we don't modify it
// during iteration.
AnchoringAdjustmentQueue queue_copy = anchoring_adjustment_queue_;
anchoring_adjustment_queue_.clear();
for (WeakMember<ScrollableArea>& scroller : queue_copy) {
if (scroller) {
DCHECK(scroller->GetScrollAnchor());
scroller->GetScrollAnchor()->Adjust();
}
}
}
static void RecordGraphicsLayerAsForeignLayer(
GraphicsContext& context,
const GraphicsLayer* graphics_layer) {
// TODO(trchen): Currently the GraphicsLayer hierarchy is still built during
// CompositingUpdate, and we have to clear them here to ensure no extraneous
// layers are still attached. In future we will disable all those layer
// hierarchy code so we won't need this line.
graphics_layer->CcLayer()->RemoveAllChildren();
RecordForeignLayer(context, DisplayItem::kForeignLayerWrapper,
graphics_layer->CcLayer(),
graphics_layer->GetPropertyTreeState());
}
static void CollectViewportLayersForLayerList(GraphicsContext& context,
VisualViewport& visual_viewport) {
DCHECK(RuntimeEnabledFeatures::BlinkGenPropertyTreesEnabled());
RecordGraphicsLayerAsForeignLayer(context, visual_viewport.ContainerLayer());
RecordGraphicsLayerAsForeignLayer(context, visual_viewport.PageScaleLayer());
RecordGraphicsLayerAsForeignLayer(context, visual_viewport.ScrollLayer());
}
static void CollectDrawableLayersForLayerListRecursively(
GraphicsContext& context,
const GraphicsLayer* layer) {
DCHECK(RuntimeEnabledFeatures::BlinkGenPropertyTreesEnabled());
if (!layer || layer->Client().ShouldThrottleRendering())
return;
// We need to collect all layers that draw content, as well as some layers
// that don't for the purposes of hit testing. For example, an empty div
// will not draw content but needs to create a layer to ensure scroll events
// do not pass through it.
if (layer->DrawsContent() || layer->GetHitTestableWithoutDrawsContent())
RecordGraphicsLayerAsForeignLayer(context, layer);
if (auto* contents_layer = layer->ContentsLayer()) {
RecordForeignLayer(context, DisplayItem::kForeignLayerContentsWrapper,
contents_layer, layer->GetContentsPropertyTreeState());
}
DCHECK(!layer->ContentsClippingMaskLayer());
for (const auto* child : layer->Children())
CollectDrawableLayersForLayerListRecursively(context, child);
CollectDrawableLayersForLayerListRecursively(context, layer->MaskLayer());
}
static void CollectLinkHighlightLayersForLayerListRecursively(
GraphicsContext& context,
const GraphicsLayer* layer) {
DCHECK(RuntimeEnabledFeatures::BlinkGenPropertyTreesEnabled());
if (!layer || layer->Client().ShouldThrottleRendering())
return;
for (auto* highlight : layer->GetLinkHighlights()) {
DCHECK(highlight->effect())
<< "Highlight effect node should have been created in PrePaint.";
auto* highlight_layer = highlight->Layer();
auto property_tree_state = layer->GetPropertyTreeState();
property_tree_state.SetEffect(highlight->effect());
RecordForeignLayer(context, DisplayItem::kForeignLayerLinkHighlight,
highlight_layer, property_tree_state);
}
for (const auto* child : layer->Children())
CollectLinkHighlightLayersForLayerListRecursively(context, child);
}
static void PaintGraphicsLayerRecursively(GraphicsLayer* layer) {
layer->PaintRecursively();
#if DCHECK_IS_ON()
VerboseLogGraphicsLayerTree(layer);
#endif
}
void LocalFrameView::PaintTree() {
SCOPED_UMA_AND_UKM_TIMER(EnsureUkmAggregator(),
LocalFrameUkmAggregator::kPaint);
DCHECK(GetFrame().IsLocalRoot());
auto* layout_view = GetLayoutView();
DCHECK(layout_view);
paint_frame_count_++;
ForAllNonThrottledLocalFrameViews([](LocalFrameView& frame_view) {
frame_view.Lifecycle().AdvanceTo(DocumentLifecycle::kInPaint);
});
if (RuntimeEnabledFeatures::CompositeAfterPaintEnabled()) {
if (!paint_controller_)
paint_controller_ = PaintController::Create();
if (GetLayoutView()->Layer()->NeedsRepaint()) {
GraphicsContext graphics_context(*paint_controller_);
if (RuntimeEnabledFeatures::PrintBrowserEnabled())
graphics_context.SetPrinting(true);
if (Settings* settings = frame_->GetSettings()) {
HighContrastSettings high_contrast_settings;
high_contrast_settings.mode = settings->GetHighContrastMode();
high_contrast_settings.grayscale = settings->GetHighContrastGrayscale();
high_contrast_settings.contrast = settings->GetHighContrastContrast();