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/*
* Copyright (C) Research In Motion Limited 2010. 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/layout/svg/layout_svg_resource_container.h"
#include "base/auto_reset.h"
#include "third_party/blink/renderer/core/layout/svg/svg_resources.h"
#include "third_party/blink/renderer/core/layout/svg/svg_resources_cache.h"
#include "third_party/blink/renderer/core/svg/svg_resource.h"
#include "third_party/blink/renderer/core/svg/svg_tree_scope_resources.h"
namespace blink {
namespace {
LocalSVGResource* ResourceForContainer(
const LayoutSVGResourceContainer& resource_container) {
const SVGElement& element = *resource_container.GetElement();
return element.GetTreeScope()
.EnsureSVGTreeScopedResources()
.ExistingResourceForId(element.GetIdAttribute());
}
} // namespace
LayoutSVGResourceContainer::LayoutSVGResourceContainer(SVGElement* node)
: LayoutSVGHiddenContainer(node),
is_in_layout_(false),
completed_invalidations_mask_(0),
is_invalidating_(false) {}
LayoutSVGResourceContainer::~LayoutSVGResourceContainer() = default;
void LayoutSVGResourceContainer::UpdateLayout() {
// FIXME: Investigate a way to detect and break resource layout dependency
// cycles early. Then we can remove this method altogether, and fall back onto
// LayoutSVGHiddenContainer::layout().
DCHECK(NeedsLayout());
if (is_in_layout_)
return;
base::AutoReset<bool> in_layout_change(&is_in_layout_, true);
LayoutSVGHiddenContainer::UpdateLayout();
ClearInvalidationMask();
}
void LayoutSVGResourceContainer::WillBeDestroyed() {
LayoutSVGHiddenContainer::WillBeDestroyed();
// The resource is being torn down.
// TODO(fs): Remove this when SVGResources is gone.
if (LocalSVGResource* resource = ResourceForContainer(*this))
resource->NotifyResourceDestroyed(*this);
}
void LayoutSVGResourceContainer::StyleDidChange(
StyleDifference diff,
const ComputedStyle* old_style) {
LayoutSVGHiddenContainer::StyleDidChange(diff, old_style);
// The resource has been attached. Notify any pending clients that
// they can now try to add themselves as clients to the resource.
// TODO(fs): Remove this when SVGResources is gone.
if (old_style)
return;
if (LocalSVGResource* resource = ResourceForContainer(*this))
resource->NotifyResourceAttached(*this);
}
void LayoutSVGResourceContainer::MarkAllClientsForInvalidation(
InvalidationModeMask invalidation_mask) {
if (is_invalidating_)
return;
LocalSVGResource* resource = ResourceForContainer(*this);
if (!resource || !resource->HasClients())
return;
// Remove modes for which invalidations have already been
// performed. If no modes remain we are done.
invalidation_mask &= ~completed_invalidations_mask_;
if (invalidation_mask == 0)
return;
completed_invalidations_mask_ |= invalidation_mask;
is_invalidating_ = true;
// Invalidate clients registered via an SVGResource.
if (resource)
resource->NotifyContentChanged(invalidation_mask);
is_invalidating_ = false;
}
void LayoutSVGResourceContainer::MarkClientForInvalidation(
LayoutObject& client,
InvalidationModeMask invalidation_mask) {
if (invalidation_mask & SVGResourceClient::kPaintInvalidation) {
// Since LayoutSVGInlineTexts don't have SVGResources (they use their
// parent's), they will not be notified of changes to paint servers. So
// if the client is one that could have a LayoutSVGInlineText use a
// paint invalidation reason that will force paint invalidation of the
// entire <text>/<tspan>/... subtree.
client.SetShouldDoFullPaintInvalidation(
PaintInvalidationReason::kSVGResource);
client.InvalidateClipPathCache();
// Invalidate paint properties to update effects if any.
client.SetNeedsPaintPropertyUpdate();
}
if (invalidation_mask & SVGResourceClient::kBoundariesInvalidation)
client.SetNeedsBoundariesUpdate();
}
void LayoutSVGResourceContainer::InvalidateCacheAndMarkForLayout(
LayoutInvalidationReasonForTracing reason,
SubtreeLayoutScope* layout_scope) {
if (SelfNeedsLayout())
return;
SetNeedsLayoutAndFullPaintInvalidation(reason, kMarkContainerChain,
layout_scope);
if (EverHadLayout())
RemoveAllClientsFromCache();
}
void LayoutSVGResourceContainer::InvalidateCacheAndMarkForLayout(
SubtreeLayoutScope* layout_scope) {
InvalidateCacheAndMarkForLayout(
LayoutInvalidationReason::kSvgResourceInvalidated, layout_scope);
}
static inline void RemoveFromCacheAndInvalidateDependencies(
LayoutObject& object,
bool needs_layout) {
if (!object.GetNode() || !object.GetNode()->IsSVGElement())
return;
SVGElement& element = ToSVGElement(*object.GetNode());
if (SVGResources* resources =
SVGResourcesCache::CachedResourcesForLayoutObject(object)) {
SVGResourceClient* client = element.GetSVGResourceClient();
if (InvalidationModeMask invalidation_mask =
resources->RemoveClientFromCacheAffectingObjectBounds(*client)) {
LayoutSVGResourceContainer::MarkClientForInvalidation(object,
invalidation_mask);
}
}
element.NotifyIncomingReferences([needs_layout](SVGElement& element) {
DCHECK(element.GetLayoutObject());
LayoutSVGResourceContainer::MarkForLayoutAndParentResourceInvalidation(
*element.GetLayoutObject(), needs_layout);
});
}
void LayoutSVGResourceContainer::MarkForLayoutAndParentResourceInvalidation(
LayoutObject& object,
bool needs_layout) {
DCHECK(object.GetNode());
if (needs_layout && !object.DocumentBeingDestroyed())
object.SetNeedsLayoutAndFullPaintInvalidation(
LayoutInvalidationReason::kSvgResourceInvalidated);
RemoveFromCacheAndInvalidateDependencies(object, needs_layout);
// Invalidate resources in ancestor chain, if needed.
LayoutObject* current = object.Parent();
while (current) {
RemoveFromCacheAndInvalidateDependencies(*current, needs_layout);
if (current->IsSVGResourceContainer()) {
// This will process the rest of the ancestors.
ToLayoutSVGResourceContainer(current)->RemoveAllClientsFromCache();
break;
}
current = current->Parent();
}
}
} // namespace blink
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