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LibWeb: Implement CSSStyleSheet.replace()

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This method asynchronously replaces the content of the given stylesheet
with the content passed to it.

An exception is thrown if this method is used by a stylesheet not
created with the `CSSStyleSheet()` constructor.
This commit is contained in:
Tim Ledbetter 2024-02-24 07:46:59 +00:00 • committed by Andreas Kling
parent d209d5a84f
commit 81c67d34eb
5 changed files with 118 additions and 3 deletions
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56
Userland/Libraries/LibWeb/CSS/CSSStyleSheet.cpp
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@ -13,6 +13,7 @@
#include <LibWeb/CSS/StyleSheetList.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/HTML/Window.h>
#include <LibWeb/Platform/EventLoopPlugin.h>
#include <LibWeb/WebIDL/ExceptionOr.h>
namespace Web::CSS {
@ -130,7 +131,9 @@ WebIDL::ExceptionOr<unsigned> CSSStyleSheet::insert_rule(StringView rule, unsign
{
// FIXME: 1. If the origin-clean flag is unset, throw a SecurityError exception.
// FIXME: 2. If the disallow modification flag is set, throw a NotAllowedError DOMException.
// If the disallow modification flag is set, throw a NotAllowedError DOMException.
if (disallow_modification())
return WebIDL::NotAllowedError::create(realm(), "Can't call insert_rule() on non-modifiable stylesheets."_fly_string);
// 3. Let parsed rule be the return value of invoking parse a rule with rule.
auto context = m_style_sheet_list ? CSS::Parser::ParsingContext { m_style_sheet_list->document() } : CSS::Parser::ParsingContext { realm() };
@ -165,7 +168,9 @@ WebIDL::ExceptionOr<void> CSSStyleSheet::delete_rule(unsigned index)
{
// FIXME: 1. If the origin-clean flag is unset, throw a SecurityError exception.
// FIXME: 2. If the disallow modification flag is set, throw a NotAllowedError DOMException.
// 2. If the disallow modification flag is set, throw a NotAllowedError DOMException.
if (disallow_modification())
return WebIDL::NotAllowedError::create(realm(), "Can't call delete_rule() on non-modifiable stylesheets."_fly_string);
// 3. Remove a CSS rule in the CSS rules at index.
auto result = m_rules->remove_a_css_rule(index);
@ -178,6 +183,53 @@ WebIDL::ExceptionOr<void> CSSStyleSheet::delete_rule(unsigned index)
return result;
}
// https://drafts.csswg.org/cssom/#dom-cssstylesheet-replace
JS::NonnullGCPtr<JS::Promise> CSSStyleSheet::replace(String text)
{
// 1. Let promise be a promise
auto promise = JS::Promise::create(realm());
// 2. If the constructed flag is not set, or the disallow modification flag is set, reject promise with a NotAllowedError DOMException and return promise.
if (!constructed()) {
promise->reject(WebIDL::NotAllowedError::create(realm(), "Can't call replace() on non-constructed stylesheets"_fly_string));
return promise;
}
if (disallow_modification()) {
promise->reject(WebIDL::NotAllowedError::create(realm(), "Can't call replace() on non-modifiable stylesheets"_fly_string));
return promise;
}
// 3. Set the disallow modification flag.
set_disallow_modification(true);
// 4. In parallel, do these steps:
Platform::EventLoopPlugin::the().deferred_invoke([this, text = move(text), promise] {
// 1. Let rules be the result of running parse a stylesheet’s contents from text.
auto context = m_style_sheet_list ? CSS::Parser::ParsingContext { m_style_sheet_list->document() } : CSS::Parser::ParsingContext { realm() };
auto* parsed_stylesheet = parse_css_stylesheet(context, text);
auto& rules = parsed_stylesheet->rules();
// 2. If rules contains one or more @import rules, remove those rules from rules.
JS::MarkedVector<JS::NonnullGCPtr<CSSRule>> rules_without_import(realm().heap());
for (auto rule : rules) {
if (rule->type() != CSSRule::Type::Import)
rules_without_import.append(rule);
}
// 3. Set sheet’s CSS rules to rules.
m_rules->set_rules({}, rules_without_import);
// 4. Unset sheet’s disallow modification flag.
set_disallow_modification(false);
// 5. Resolve promise with sheet.
promise->fulfill(this);
});
return promise;
}
// https://www.w3.org/TR/cssom/#dom-cssstylesheet-removerule
WebIDL::ExceptionOr<void> CSSStyleSheet::remove_rule(unsigned index)
{