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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 "chrome/common/read_anything/read_anything_util.h"
#include <algorithm>
#include <string>
#include <string_view>
#include <vector>
#include "base/containers/fixed_flat_map.h"
#include "base/containers/fixed_flat_set.h"
#include "base/metrics/histogram_functions.h"
#include "base/numerics/safe_conversions.h"
namespace {
// All values are in em.
constexpr double kMinScale = 0.5;
constexpr double kMaxScale = 4.5;
constexpr double kScaleStepSize = 0.25;
int AsSteps(double font_scale) {
return base::ClampRound((font_scale - kMinScale) / kScaleStepSize);
}
} // namespace
std::vector<std::string> GetSupportedFonts(std::string_view language_code) {
// If you modify the set of fonts here, also change `LogFontName()` below.
static constexpr auto kPoppinsLangs =
base::MakeFixedFlatSet<std::string_view>(
{"af", "ca", "cs", "da", "de", "en", "es", "et", "fi", "fil",
"fr", "hi", "hr", "hu", "id", "it", "lt", "lv", "mr", "ms",
"nl", "pl", "pt", "ro", "sk", "sl", "sv", "sw", "tr"});
static constexpr auto kComicNeueLangs =
base::MakeFixedFlatSet<std::string_view>(
{"af", "ca", "cs", "da", "de", "en", "es", "et",
"fi", "fil", "fr", "hr", "hu", "id", "it", "ms",
"nl", "pl", "pt", "sk", "sl", "sv", "sw"});
static constexpr auto kLexendDecaLangs =
base::MakeFixedFlatSet<std::string_view>(
{"af", "ca", "cs", "da", "de", "en", "es", "et", "fi", "fil",
"fr", "hr", "hu", "id", "it", "lt", "lv", "ms", "nl", "pl",
"pt", "ro", "sk", "sl", "sv", "sw", "tr", "vi"});
static constexpr auto kEbGaramondLangs =
base::MakeFixedFlatSet<std::string_view>(
{"af", "bg", "ca", "cs", "da", "de", "en", "es", "et", "fi", "fil",
"fr", "hr", "hu", "id", "it", "lt", "lv", "ms", "nl", "pl", "pt",
"ro", "ru", "sk", "sl", "sr", "sv", "sw", "tr", "uk", "vi"});
static constexpr auto kStixTwoTextLangs =
base::MakeFixedFlatSet<std::string_view>(
{"af", "bg", "ca", "cs", "da", "de", "en", "es", "et", "fi", "fil",
"fr", "hr", "hu", "id", "it", "lt", "lv", "ms", "nl", "pl", "pt",
"ro", "ru", "sk", "sl", "sr", "sv", "sw", "tr", "uk", "vi"});
static constexpr auto kAndikaLangs = base::MakeFixedFlatSet<std::string_view>(
{"af", "bg", "ca", "cs", "da", "de", "en", "es", "et",
"fi", "fil", "fr", "hr", "hu", "id", "it", "kr", "lt",
"lu", "lv", "ms", "nd", "nl", "nr", "pl", "pt", "ro",
"ru", "sk", "sl", "sr", "sv", "sw", "tr", "uk", "vi"});
static constexpr auto kAtkinsonHyperlegibleLangs =
base::MakeFixedFlatSet<std::string_view>(
{"af", "ca", "cs", "da", "de", "en", "es", "et", "eu", "fi", "fil",
"fr", "gl", "hr", "hu", "id", "is", "it", "kk", "lt", "ms", "nl",
"no", "pl", "pt", "ro", "sl", "sq", "sr", "sv", "sw", "zu"});
std::vector<std::string> font_choices = {"Sans-serif", "Serif"};
if (language_code.empty() || kPoppinsLangs.contains(language_code)) {
// Make this default by putting it first.
font_choices.insert(font_choices.begin(), "Poppins");
}
if (language_code.empty() || kComicNeueLangs.contains(language_code)) {
font_choices.push_back("Comic Neue");
}
if (language_code.empty() || kLexendDecaLangs.contains(language_code)) {
font_choices.push_back("Lexend Deca");
}
if (language_code.empty() || kEbGaramondLangs.contains(language_code)) {
font_choices.push_back("EB Garamond");
}
if (language_code.empty() || kStixTwoTextLangs.contains(language_code)) {
font_choices.push_back("STIX Two Text");
}
if (language_code.empty() || kAndikaLangs.contains(language_code)) {
font_choices.push_back("Andika");
}
if (language_code.empty() ||
kAtkinsonHyperlegibleLangs.contains(language_code)) {
font_choices.push_back("Atkinson Hyperlegible");
}
return font_choices;
}
void LogFontName(std::string_view font_name) {
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
// If you modify the set of fonts here, also change `GetSupportedFonts()`
// above.
// LINT.IfChange(ReadAnythingFont)
enum class ReadAnythingFont {
kPoppins = 0,
kSansSerif = 1,
kSerif = 2,
kComicNeue = 3,
kLexendDeca = 4,
kEbGaramond = 5,
kStixTwoText = 6,
kAndika = 7,
kAtkinsonHyperlegible = 8,
kMaxValue = kAtkinsonHyperlegible,
};
// LINT.ThenChange(//tools/metrics/histograms/metadata/accessibility/enums.xml:ReadAnythingFontName)
static constexpr auto kFontMap =
base::MakeFixedFlatMap<std::string_view, ReadAnythingFont>(
{{"Poppins", ReadAnythingFont::kPoppins},
{"Sans-serif", ReadAnythingFont::kSansSerif},
{"Serif", ReadAnythingFont::kSerif},
{"Comic Neue", ReadAnythingFont::kComicNeue},
{"Lexend Deca", ReadAnythingFont::kLexendDeca},
{"EB Garamond", ReadAnythingFont::kEbGaramond},
{"STIX Two Text", ReadAnythingFont::kStixTwoText},
{"Andika", ReadAnythingFont::kAndika},
{"Atkinson Hyperlegible", ReadAnythingFont::kAtkinsonHyperlegible}});
if (const auto it = kFontMap.find(font_name); it != kFontMap.end()) {
base::UmaHistogramEnumeration("Accessibility.ReadAnything.FontName",
it->second);
}
}
double AdjustFontScale(double font_scale, int increment) {
return std::clamp(
kMinScale + (AsSteps(font_scale) + increment) * kScaleStepSize, kMinScale,
kMaxScale);
}
void LogFontScale(double font_scale) {
base::UmaHistogramExactLinear("Accessibility.ReadAnything.FontScale",
AsSteps(font_scale), AsSteps(kMaxScale) + 1);
}
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