ddbfac38b0
You can now build with STYLE_INVALIDATION_DEBUG and get a debug stream of reasons why style invalidations are happening and where. I've rewritten this code many times, so instead of throwing it away once again, I figured we should at least have it behind a flag.
47 lines
2.2 KiB
C++
47 lines
2.2 KiB
C++
/*
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* Copyright (c) 2024, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/CSS/StyleComputer.h>
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#include <LibWeb/DOM/AdoptedStyleSheets.h>
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#include <LibWeb/DOM/Document.h>
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namespace Web::DOM {
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JS::NonnullGCPtr<WebIDL::ObservableArray> create_adopted_style_sheets_list(Document& document)
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{
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auto adopted_style_sheets = WebIDL::ObservableArray::create(document.realm());
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adopted_style_sheets->set_on_set_an_indexed_value_callback([&document](JS::Value& value) -> WebIDL::ExceptionOr<void> {
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auto& vm = document.vm();
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if (!value.is_object())
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return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "CSSStyleSheet");
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auto& object = value.as_object();
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if (!is<CSS::CSSStyleSheet>(object))
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return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "CSSStyleSheet");
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auto& style_sheet = static_cast<CSS::CSSStyleSheet&>(object);
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// The set an indexed value algorithm for adoptedStyleSheets, given value and index, is the following:
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// 1. If value’s constructed flag is not set, or its constructor document is not equal to this
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// DocumentOrShadowRoot's node document, throw a "NotAllowedError" DOMException.
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if (!style_sheet.constructed())
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return WebIDL::NotAllowedError::create(document.realm(), "StyleSheet's constructed flag is not set."_fly_string);
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if (!style_sheet.constructed() || style_sheet.constructor_document().ptr() != &document)
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return WebIDL::NotAllowedError::create(document.realm(), "Sharing a StyleSheet between documents is not allowed."_fly_string);
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document.style_computer().load_fonts_from_sheet(style_sheet);
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document.style_computer().invalidate_rule_cache();
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document.invalidate_style(DOM::StyleInvalidationReason::AdoptedStyleSheetsList);
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return {};
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});
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adopted_style_sheets->set_on_delete_an_indexed_value_callback([&document]() -> WebIDL::ExceptionOr<void> {
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document.style_computer().invalidate_rule_cache();
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document.invalidate_style(DOM::StyleInvalidationReason::AdoptedStyleSheetsList);
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return {};
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});
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return adopted_style_sheets;
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}
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}
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