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LibWeb: Support named CSS properties on CSSStyleDeclaration wrapper
Use the new CustomGet/CustomPut wrapper mechansim to intercept gets and puts on CSSStyleDeclaration objects. This allows content to get and set individual CSS properties from JavaScript. :^)
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/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibWeb/Bindings/CSSStyleDeclarationWrapper.h>
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#include <LibWeb/CSS/Parser/DeprecatedCSSParser.h>
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namespace Web::Bindings {
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JS::Value CSSStyleDeclarationWrapper::get(const JS::PropertyName& name, JS::Value receiver) const
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{
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// FIXME: These should actually use camelCase versions of the property names!
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auto property_id = CSS::property_id_from_string(name.to_string());
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if (property_id == CSS::PropertyID::Invalid)
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return Base::get(name, receiver);
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for (auto& property : impl().properties()) {
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if (property.property_id == property_id)
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return js_string(vm(), property.value->to_string());
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}
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return js_string(vm(), String::empty());
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}
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bool CSSStyleDeclarationWrapper::put(const JS::PropertyName& name, JS::Value value, JS::Value receiver)
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{
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// FIXME: These should actually use camelCase versions of the property names!
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auto property_id = CSS::property_id_from_string(name.to_string());
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if (property_id == CSS::PropertyID::Invalid)
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return Base::put(name, value, receiver);
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auto css_text = value.to_string(global_object());
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if (vm().exception())
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return false;
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auto new_value = parse_css_value(CSS::ParsingContext {}, css_text, property_id);
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// FIXME: What are we supposed to do if we can't parse it?
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if (!new_value)
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return false;
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// FIXME: I don't think '!important' is being handled correctly here..
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for (auto& property : impl().m_properties) {
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if (property.property_id == property_id) {
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property.value = new_value.release_nonnull();
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return true;
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}
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}
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impl().m_properties.append(CSS::StyleProperty {
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.property_id = property_id,
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.value = new_value.release_nonnull(),
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.important = false,
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});
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return true;
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}
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}
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