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// Copyright 2015 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/favicon/core/fallback_url_util.h"
#include "base/i18n/break_iterator.h"
#include "base/i18n/case_conversion.h"
#include "base/strings/string_util.h"
#include "components/url_formatter/url_formatter.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "url/gurl.h"
namespace {
constexpr char16_t kFallbackIconTextForIP[] = u"IP";
#if BUILDFLAG(IS_IOS)
constexpr char16_t kFallbackIconTextForAndroidApp[] = u"A";
#endif
} // namespace
namespace favicon {
std::u16string GetFallbackIconText(const GURL& url) {
if (url.is_empty()) {
return std::u16string();
}
std::string domain = net::registry_controlled_domains::GetDomainAndRegistry(
url, net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
if (domain.empty()) { // E.g., http://localhost/ or http://192.168.0.1/
if (url.HostIsIPAddress()) {
return kFallbackIconTextForIP;
}
domain = url.host();
#if BUILDFLAG(IS_IOS)
// Return "A" if it's an Android app URL. iOS only.
if (url.is_valid() && url.spec().rfind("android://", 0) == 0) {
return kFallbackIconTextForAndroidApp;
}
#endif
}
if (domain.empty()) {
return std::u16string();
}
std::u16string utf16_string = url_formatter::IDNToUnicode(domain);
base::i18n::BreakIterator iter(utf16_string,
base::i18n::BreakIterator::BREAK_CHARACTER);
if (!iter.Init()) {
return std::u16string();
}
if (!iter.Advance()) {
return std::u16string();
}
return base::i18n::ToUpper(iter.GetString());
}
} // namespace favicon
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