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// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cobalt/css_parser/transition_shorthand_property_parse_structures.h"
#include "cobalt/cssom/css_declared_style_data.h"
namespace cobalt {
namespace css_parser {
namespace {
// While the inital values for transition_duration, transition_timing_function
// and transition_delay are well defined, they are lists of single objects,
// and right here what we really need are those single objects. These wrapper
// functions extract the single element out of the initial list values for
// each different optional transition property.
cssom::PropertyKey GetInitialProperty() {
return base::polymorphic_downcast<const cssom::PropertyKeyListValue*>(
cssom::GetPropertyInitialValue(cssom::kTransitionPropertyProperty)
.get())
->value()[0];
}
base::TimeDelta GetInitialDuration() {
return base::polymorphic_downcast<const cssom::TimeListValue*>(
cssom::GetPropertyInitialValue(cssom::kTransitionDurationProperty)
.get())
->value()[0];
}
scoped_refptr<cssom::TimingFunction> GetInitialTimingFunction() {
return base::polymorphic_downcast<const cssom::TimingFunctionListValue*>(
cssom::GetPropertyInitialValue(
cssom::kTransitionTimingFunctionProperty)
.get())
->value()[0];
}
base::TimeDelta GetInitialDelay() {
return base::polymorphic_downcast<const cssom::TimeListValue*>(
cssom::GetPropertyInitialValue(cssom::kTransitionDelayProperty)
.get())
->value()[0];
}
} // namespace
void SingleTransitionShorthand::ReplaceNullWithInitialValues() {
if (!property) {
property = GetInitialProperty();
}
if (!duration) {
duration = GetInitialDuration();
}
if (!timing_function) {
timing_function = GetInitialTimingFunction();
}
if (!delay) {
delay = GetInitialDelay();
}
}
} // namespace css_parser
} // namespace cobalt