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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/omnibox/common/string_cleaning.h"
#include <string>
#include "base/i18n/case_conversion.h"
#include "base/strings/escape.h"
#include "base/strings/utf_offset_string_conversions.h"
#include "components/url_formatter/url_formatter.h"
#include "url/gurl.h"
namespace string_cleaning {
namespace {
// The maximum length of URL or title returned by the Cleanup functions.
const size_t kCleanedUpUrlMaxLength = 1024u;
const size_t kCleanedUpTitleMaxLength = 1024u;
} // namespace
// Attempts to shorten a URL safely (i.e., by preventing the end of the URL from
// being in the middle of an escape sequence) to no more than
// 'kCleanedUpUrlMaxLength' characters, returning the result.
std::string TruncateUrl(const std::string& url) {
if (url.length() <= kCleanedUpUrlMaxLength) {
return url;
}
// If we're in the middle of an escape sequence, truncate just before it.
if (url[kCleanedUpUrlMaxLength - 1] == '%') {
return url.substr(0, kCleanedUpUrlMaxLength - 1);
}
if (url[kCleanedUpUrlMaxLength - 2] == '%') {
return url.substr(0, kCleanedUpUrlMaxLength - 2);
}
return url.substr(0, kCleanedUpUrlMaxLength);
}
std::u16string CleanUpUrlForMatching(
const GURL& gurl,
base::OffsetAdjuster::Adjustments* adjustments) {
DCHECK(gurl.is_valid());
base::OffsetAdjuster::Adjustments tmp_adjustments;
return base::i18n::ToLower(url_formatter::FormatUrlWithAdjustments(
GURL(TruncateUrl(gurl.spec())),
url_formatter::kFormatUrlOmitUsernamePassword,
base::UnescapeRule::SPACES | base::UnescapeRule::PATH_SEPARATORS |
base::UnescapeRule::URL_SPECIAL_CHARS_EXCEPT_PATH_SEPARATORS,
nullptr, nullptr, adjustments ? adjustments : &tmp_adjustments));
}
std::u16string CleanUpTitleForMatching(const std::u16string& title) {
return base::i18n::ToLower(title.substr(0u, kCleanedUpTitleMaxLength));
}
} // namespace string_cleaning
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