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LibWeb: Avoid allocating UTF-16 strings only the UTF-16 length is needed

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Timothy Flynn 2024-07-30 06:46:30 -04:00 committed by Tim Flynn
parent 7a17c654d2
commit 4a166a45ec
Notes: github-actions[bot] 2024-07-31 09:56:31 +00:00 
Author: https://github.com/trflynn89
Commit: https://github.com/LadybirdBrowser/ladybird/commit/4a166a45ec9
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/901
2 changed files with 4 additions and 6 deletions
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5
Userland/Libraries/LibWeb/DOM/CharacterData.h
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@ -7,6 +7,7 @@
#pragma once
#include <AK/String.h>
#include <AK/Utf16View.h>
#include <LibUnicode/Forward.h>
#include <LibWeb/DOM/ChildNode.h>
#include <LibWeb/DOM/Node.h>
@ -30,9 +31,7 @@ public:
unsigned length_in_utf16_code_units() const
{
// FIXME: This is inefficient!
auto utf16_data = MUST(AK::utf8_to_utf16(m_data));
return Utf16View { utf16_data }.length_in_code_units();
return AK::utf16_code_unit_length_from_utf8(m_data);
}
WebIDL::ExceptionOr<String> substring_data(size_t offset_in_utf16_code_units, size_t count_in_utf16_code_units) const;

5
Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp
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@ -6,6 +6,7 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Utf16View.h>
#include <LibWeb/Bindings/HTMLTextAreaElementPrototype.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/CSS/StyleProperties.h>
@ -189,9 +190,7 @@ String HTMLTextAreaElement::api_value() const
u32 HTMLTextAreaElement::text_length() const
{
// The textLength IDL attribute must return the length of the element's API value.
// FIXME: This is inefficient!
auto utf16_data = MUST(AK::utf8_to_utf16(api_value()));
return Utf16View { utf16_data }.length_in_code_units();
return AK::utf16_code_unit_length_from_utf8(api_value());
}
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-cva-checkvalidity