blob: 17248cda34aa6b6a7196f7f006f2085fa9ab426c [file] [log] [blame]
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* Copyright (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004-2020 Apple 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 "config.h"
#include "RenderWidget.h"
#include "AXObjectCache.h"
#include "FloatRoundedRect.h"
#include "Frame.h"
#include "HTMLFrameOwnerElement.h"
#include "HitTestResult.h"
#include "RenderLayer.h"
#include "RenderLayerBacking.h"
#include "RenderView.h"
#include "SecurityOrigin.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/StackStats.h>
#include <wtf/Ref.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderWidget);
static HashMap<const Widget*, RenderWidget*>& widgetRendererMap()
{
static HashMap<const Widget*, RenderWidget*>* staticWidgetRendererMap = new HashMap<const Widget*, RenderWidget*>;
return *staticWidgetRendererMap;
}
unsigned WidgetHierarchyUpdatesSuspensionScope::s_widgetHierarchyUpdateSuspendCount = 0;
WidgetHierarchyUpdatesSuspensionScope::WidgetToParentMap& WidgetHierarchyUpdatesSuspensionScope::widgetNewParentMap()
{
static NeverDestroyed<WidgetToParentMap> map;
return map;
}
void WidgetHierarchyUpdatesSuspensionScope::moveWidgets()
{
while (!widgetNewParentMap().isEmpty()) {
auto map = std::exchange(widgetNewParentMap(), { });
for (auto& entry : map) {
auto& child = *entry.key;
auto* currentParent = child.parent();
auto* newParent = entry.value;
if (newParent != currentParent) {
if (currentParent)
currentParent->removeChild(child);
if (newParent)
newParent->addChild(child);
}
}
}
}
static void moveWidgetToParentSoon(Widget& child, FrameView* parent)
{
if (!WidgetHierarchyUpdatesSuspensionScope::isSuspended()) {
if (parent)
parent->addChild(child);
else
child.removeFromParent();
return;
}
WidgetHierarchyUpdatesSuspensionScope::scheduleWidgetToMove(child, parent);
}
RenderWidget::RenderWidget(HTMLFrameOwnerElement& element, RenderStyle&& style)
: RenderReplaced(element, WTFMove(style))
{
setInline(false);
}
void RenderWidget::willBeDestroyed()
{
#if PLATFORM(IOS_FAMILY)
if (hasLayer())
layer()->willBeDestroyed();
#endif
if (AXObjectCache* cache = document().existingAXObjectCache()) {
cache->childrenChanged(this->parent());
cache->remove(this);
}
setWidget(nullptr);
RenderReplaced::willBeDestroyed();
}
RenderWidget::~RenderWidget()
{
ASSERT(!m_refCount);
}
// Widgets are always placed on integer boundaries, so rounding the size is actually
// the desired behavior. This function is here because it's otherwise seldom what we
// want to do with a LayoutRect.
static inline IntRect roundedIntRect(const LayoutRect& rect)
{
return IntRect(roundedIntPoint(rect.location()), roundedIntSize(rect.size()));
}
bool RenderWidget::setWidgetGeometry(const LayoutRect& frame)
{
IntRect clipRect = roundedIntRect(enclosingLayer()->childrenClipRect());
IntRect newFrameRect = roundedIntRect(frame);
IntRect oldFrameRect = m_widget->frameRect();
bool clipChanged = m_clipRect != clipRect;
bool boundsChanged = oldFrameRect != newFrameRect;
if (!boundsChanged && !clipChanged)
return false;
m_clipRect = clipRect;
auto weakThis = makeWeakPtr(*this);
// These calls *may* cause this renderer to disappear from underneath...
if (boundsChanged)
m_widget->setFrameRect(newFrameRect);
else if (clipChanged)
m_widget->clipRectChanged();
// ...so we follow up with a sanity check.
if (!weakThis)
return true;
if (boundsChanged)
view().compositor().widgetDidChangeSize(*this);
return oldFrameRect.size() != newFrameRect.size();
}
bool RenderWidget::updateWidgetGeometry()
{
if (!m_widget->transformsAffectFrameRect())
return setWidgetGeometry(absoluteContentBox());
LayoutRect contentBox = contentBoxRect();
LayoutRect absoluteContentBox(localToAbsoluteQuad(FloatQuad(contentBox)).boundingBox());
if (m_widget->isFrameView()) {
contentBox.setLocation(absoluteContentBox.location());
return setWidgetGeometry(contentBox);
}
return setWidgetGeometry(absoluteContentBox);
}
void RenderWidget::setWidget(RefPtr<Widget>&& widget)
{
if (widget == m_widget)
return;
if (m_widget) {
moveWidgetToParentSoon(*m_widget, nullptr);
view().frameView().willRemoveWidgetFromRenderTree(*m_widget);
widgetRendererMap().remove(m_widget.get());
m_widget = nullptr;
}
m_widget = widget;
if (m_widget) {
widgetRendererMap().add(m_widget.get(), this);
view().frameView().didAddWidgetToRenderTree(*m_widget);
// If we've already received a layout, apply the calculated space to the
// widget immediately, but we have to have really been fully constructed.
if (hasInitializedStyle()) {
if (!needsLayout()) {
auto weakThis = makeWeakPtr(*this);
updateWidgetGeometry();
if (!weakThis)
return;
}
if (style().visibility() != Visibility::Visible)
m_widget->hide();
else {
m_widget->show();
repaint();
}
}
moveWidgetToParentSoon(*m_widget, &view().frameView());
}
}
void RenderWidget::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
ASSERT(needsLayout());
clearNeedsLayout();
}
void RenderWidget::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderReplaced::styleDidChange(diff, oldStyle);
if (m_widget) {
if (style().visibility() != Visibility::Visible)
m_widget->hide();
else
m_widget->show();
}
}
void RenderWidget::paintContents(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
if (paintInfo.requireSecurityOriginAccessForWidgets) {
if (auto contentDocument = frameOwnerElement().contentDocument()) {
if (!document().securityOrigin().canAccess(contentDocument->securityOrigin()))
return;
}
}
IntPoint contentPaintOffset = roundedIntPoint(paintOffset + location() + contentBoxRect().location());
// Tell the widget to paint now. This is the only time the widget is allowed
// to paint itself. That way it will composite properly with z-indexed layers.
LayoutRect paintRect = paintInfo.rect;
OptionSet<PaintBehavior> oldBehavior = PaintBehavior::Normal;
if (is<FrameView>(*m_widget) && (paintInfo.paintBehavior & PaintBehavior::TileFirstPaint)) {
FrameView& frameView = downcast<FrameView>(*m_widget);
oldBehavior = frameView.paintBehavior();
frameView.setPaintBehavior(oldBehavior | PaintBehavior::TileFirstPaint);
}
IntPoint widgetLocation = m_widget->frameRect().location();
IntSize widgetPaintOffset = contentPaintOffset - widgetLocation;
// When painting widgets into compositing layers, tx and ty are relative to the enclosing compositing layer,
// not the root. In this case, shift the CTM and adjust the paintRect to be root-relative to fix plug-in drawing.
if (!widgetPaintOffset.isZero()) {
paintInfo.context().translate(widgetPaintOffset);
paintRect.move(-widgetPaintOffset);
}
if (paintInfo.eventRegionContext) {
AffineTransform transform;
transform.translate(contentPaintOffset);
paintInfo.eventRegionContext->pushTransform(transform);
}
// FIXME: Remove repaintrect enclosing/integral snapping when RenderWidget becomes device pixel snapped.
m_widget->paint(paintInfo.context(), snappedIntRect(paintRect), paintInfo.requireSecurityOriginAccessForWidgets ? Widget::SecurityOriginPaintPolicy::AccessibleOriginOnly : Widget::SecurityOriginPaintPolicy::AnyOrigin, paintInfo.eventRegionContext);
if (paintInfo.eventRegionContext)
paintInfo.eventRegionContext->popTransform();
if (!widgetPaintOffset.isZero())
paintInfo.context().translate(-widgetPaintOffset);
if (is<FrameView>(*m_widget)) {
FrameView& frameView = downcast<FrameView>(*m_widget);
bool runOverlapTests = !frameView.useSlowRepaintsIfNotOverlapped();
if (paintInfo.overlapTestRequests && runOverlapTests) {
ASSERT(!paintInfo.overlapTestRequests->contains(this) || (paintInfo.overlapTestRequests->get(this) == m_widget->frameRect()));
paintInfo.overlapTestRequests->set(this, m_widget->frameRect());
}
if (paintInfo.paintBehavior & PaintBehavior::TileFirstPaint)
frameView.setPaintBehavior(oldBehavior);
}
}
void RenderWidget::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
if (!shouldPaint(paintInfo, paintOffset))
return;
LayoutPoint adjustedPaintOffset = paintOffset + location();
if (hasVisibleBoxDecorations() && (paintInfo.phase == PaintPhase::Foreground || paintInfo.phase == PaintPhase::Selection))
paintBoxDecorations(paintInfo, adjustedPaintOffset);
if (paintInfo.phase == PaintPhase::Mask) {
paintMask(paintInfo, adjustedPaintOffset);
return;
}
if ((paintInfo.phase == PaintPhase::Outline || paintInfo.phase == PaintPhase::SelfOutline) && hasOutline())
paintOutline(paintInfo, LayoutRect(adjustedPaintOffset, size()));
// FIXME: Shouldn't check if the frame view needs layout during event region painting. This is a workaround
// for the fact that non-composited frames depend on their enclosing compositing layer to perform an event
// region update on their behalf. See <https://webkit.org/b/210311> for more details.
bool needsEventRegionContentPaint = paintInfo.phase == PaintPhase::EventRegion && is<FrameView>(m_widget) && !downcast<FrameView>(*m_widget).needsLayout();
if (paintInfo.phase != PaintPhase::Foreground && !needsEventRegionContentPaint)
return;
if (style().hasBorderRadius()) {
LayoutRect borderRect = LayoutRect(adjustedPaintOffset, size());
if (borderRect.isEmpty())
return;
// Push a clip if we have a border radius, since we want to round the foreground content that gets painted.
paintInfo.context().save();
FloatRoundedRect roundedInnerRect = FloatRoundedRect(style().getRoundedInnerBorderFor(borderRect,
paddingTop() + borderTop(), paddingBottom() + borderBottom(), paddingLeft() + borderLeft(), paddingRight() + borderRight(), true, true));
clipRoundedInnerRect(paintInfo.context(), borderRect, roundedInnerRect);
}
if (m_widget)
paintContents(paintInfo, paintOffset);
if (style().hasBorderRadius())
paintInfo.context().restore();
if (paintInfo.phase == PaintPhase::EventRegion)
return;
// Paint a partially transparent wash over selected widgets.
if (isSelected() && !document().printing()) {
// FIXME: selectionRect() is in absolute, not painting coordinates.
paintInfo.context().fillRect(snappedIntRect(selectionRect()), selectionBackgroundColor());
}
if (hasLayer() && layer()->canResize())
layer()->paintResizer(paintInfo.context(), roundedIntPoint(adjustedPaintOffset), paintInfo.rect);
}
void RenderWidget::setOverlapTestResult(bool isOverlapped)
{
ASSERT(m_widget);
downcast<FrameView>(*m_widget).setIsOverlapped(isOverlapped);
}
RenderWidget::ChildWidgetState RenderWidget::updateWidgetPosition()
{
if (!m_widget)
return ChildWidgetState::Destroyed;
auto weakThis = makeWeakPtr(*this);
bool widgetSizeChanged = updateWidgetGeometry();
if (!weakThis || !m_widget)
return ChildWidgetState::Destroyed;
// if the frame size got changed, or if view needs layout (possibly indicating
// content size is wrong) we have to do a layout to set the right widget size.
if (is<FrameView>(*m_widget)) {
FrameView& frameView = downcast<FrameView>(*m_widget);
// Check the frame's page to make sure that the frame isn't in the process of being destroyed.
if ((widgetSizeChanged || frameView.needsLayout()) && frameView.frame().page() && frameView.frame().document())
frameView.layoutContext().layout();
}
return ChildWidgetState::Valid;
}
IntRect RenderWidget::windowClipRect() const
{
return intersection(view().frameView().contentsToWindow(m_clipRect), view().frameView().windowClipRect());
}
void RenderWidget::setSelectionState(HighlightState state)
{
// The selection state for our containing block hierarchy is updated by the base class call.
RenderReplaced::setSelectionState(state);
if (m_widget)
m_widget->setIsSelected(isSelected());
}
RenderWidget* RenderWidget::find(const Widget& widget)
{
return widgetRendererMap().get(&widget);
}
bool RenderWidget::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction action)
{
auto shouldHitTestChildFrameContent = request.allowsChildFrameContent() || (request.allowsVisibleChildFrameContent() && visibleToHitTesting());
auto hasRenderView = is<FrameView>(widget()) && downcast<FrameView>(*widget()).renderView();
if (shouldHitTestChildFrameContent && hasRenderView) {
FrameView& childFrameView = downcast<FrameView>(*widget());
LayoutPoint adjustedLocation = accumulatedOffset + location();
LayoutPoint contentOffset = LayoutPoint(borderLeft() + paddingLeft(), borderTop() + paddingTop()) - toIntSize(childFrameView.scrollPosition());
HitTestLocation newHitTestLocation(locationInContainer, -adjustedLocation - contentOffset);
HitTestRequest newHitTestRequest(request.type() | HitTestRequest::ChildFrameHitTest);
HitTestResult childFrameResult(newHitTestLocation);
auto* document = childFrameView.frame().document();
if (!document)
return false;
bool isInsideChildFrame = document->hitTest(newHitTestRequest, newHitTestLocation, childFrameResult);
if (request.resultIsElementList())
result.append(childFrameResult, request);
else if (isInsideChildFrame)
result = childFrameResult;
if (isInsideChildFrame)
return true;
}
bool hadResult = result.innerNode();
bool inside = RenderReplaced::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, action);
// Check to see if we are really over the widget itself (and not just in the border/padding area).
if ((inside || result.isRectBasedTest()) && !hadResult && result.innerNode() == &frameOwnerElement())
result.setIsOverWidget(contentBoxRect().contains(result.localPoint()));
return inside;
}
bool RenderWidget::requiresLayer() const
{
return RenderReplaced::requiresLayer() || requiresAcceleratedCompositing();
}
bool RenderWidget::requiresAcceleratedCompositing() const
{
// If this is a renderer with a contentDocument and that document needs a layer, then we need a layer.
if (Document* contentDocument = frameOwnerElement().contentDocument()) {
if (RenderView* view = contentDocument->renderView())
return view->usesCompositing();
}
return false;
}
bool RenderWidget::needsPreferredWidthsRecalculation() const
{
if (RenderReplaced::needsPreferredWidthsRecalculation())
return true;
return embeddedContentBox();
}
RenderBox* RenderWidget::embeddedContentBox() const
{
if (!is<FrameView>(widget()))
return nullptr;
return downcast<FrameView>(*widget()).embeddedContentBox();
}
} // namespace WebCore