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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/style/harmonized_colors.h"
#include <algorithm>
#include <functional>
#include <utility>
#include "third_party/material_color_utilities/src/cpp/palettes/tones.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/chromeos/styles/cros_tokens_color_mappings.h"
#include "ui/color/color_id.h"
#include "ui/color/color_recipe.h"
namespace ash {
namespace {
using material_color_utilities::TonalPalette;
// Upper limits for the angle range.
constexpr std::array<SkColor, 4> kAngles = {49, 159, 219, 360};
constexpr std::array<SkColor, 4> kGreens = {0x5BA22FU, 0x4FA834U, 0x34A866,
0x34A87AU};
constexpr std::array<SkColor, 4> kYellows = {0xEF9800U, 0xFBBC04, 0xFBC104U,
0xFBA904U};
constexpr std::array<SkColor, 4> kReds = {0xF95C45U, 0xEA7135, 0xEA6235,
0xEA3553};
constexpr std::array<SkColor, 4> kBlues = {0x3F5AA9, 0x00829D, 0x00829D,
0x3F5AA9};
struct HarmonizedSeeds {
SkColor red;
SkColor green;
SkColor yellow;
SkColor blue;
};
std::pair<int, HarmonizedSeeds> MakeSeedEntry(int i) {
HarmonizedSeeds seed;
seed.red = kReds[i];
seed.green = kGreens[i];
seed.yellow = kYellows[i];
seed.blue = kBlues[i];
return std::make_pair(kAngles[i], seed);
}
const base::flat_map<int, HarmonizedSeeds> MakeMap() {
std::vector<std::pair<int, HarmonizedSeeds>> storage;
storage.reserve(4);
for (int i = 0; i < 4; i++) {
storage.push_back(MakeSeedEntry(i));
}
return base::flat_map<int, HarmonizedSeeds>(base::sorted_unique_t(),
std::move(storage));
}
// Mappings of tones to ColorId as they comprise the tonal palette.
// https://m3.material.io/styles/color/the-color-system/key-colors-tones
constexpr std::array<std::pair<int, ui::ColorId>, 13> kRedIds{
std::make_pair(0, cros_tokens::kCrosRefRed0),
{10, cros_tokens::kCrosRefRed10},
{20, cros_tokens::kCrosRefRed20},
{30, cros_tokens::kCrosRefRed30},
{40, cros_tokens::kCrosRefRed40},
{50, cros_tokens::kCrosRefRed50},
{60, cros_tokens::kCrosRefRed60},
{70, cros_tokens::kCrosRefRed70},
{80, cros_tokens::kCrosRefRed80},
{90, cros_tokens::kCrosRefRed90},
{95, cros_tokens::kCrosRefRed95},
{99, cros_tokens::kCrosRefRed99},
{100, cros_tokens::kCrosRefRed100}};
constexpr std::array<std::pair<int, ui::ColorId>, 13> kGreenIds{
std::make_pair(0, cros_tokens::kCrosRefGreen0),
{10, cros_tokens::kCrosRefGreen10},
{20, cros_tokens::kCrosRefGreen20},
{30, cros_tokens::kCrosRefGreen30},
{40, cros_tokens::kCrosRefGreen40},
{50, cros_tokens::kCrosRefGreen50},
{60, cros_tokens::kCrosRefGreen60},
{70, cros_tokens::kCrosRefGreen70},
{80, cros_tokens::kCrosRefGreen80},
{90, cros_tokens::kCrosRefGreen90},
{95, cros_tokens::kCrosRefGreen95},
{99, cros_tokens::kCrosRefGreen99},
{100, cros_tokens::kCrosRefGreen100}};
constexpr std::array<std::pair<int, ui::ColorId>, 13> kYellowIds{
std::make_pair(0, cros_tokens::kCrosRefYellow0),
{10, cros_tokens::kCrosRefYellow10},
{20, cros_tokens::kCrosRefYellow20},
{30, cros_tokens::kCrosRefYellow30},
{40, cros_tokens::kCrosRefYellow40},
{50, cros_tokens::kCrosRefYellow50},
{60, cros_tokens::kCrosRefYellow60},
{70, cros_tokens::kCrosRefYellow70},
{80, cros_tokens::kCrosRefYellow80},
{90, cros_tokens::kCrosRefYellow90},
{95, cros_tokens::kCrosRefYellow95},
{99, cros_tokens::kCrosRefYellow99},
{100, cros_tokens::kCrosRefYellow100}};
constexpr std::array<std::pair<int, ui::ColorId>, 13> kBlueIds{
std::make_pair(0, cros_tokens::kCrosRefBlue0),
{10, cros_tokens::kCrosRefBlue10},
{20, cros_tokens::kCrosRefBlue20},
{30, cros_tokens::kCrosRefBlue30},
{40, cros_tokens::kCrosRefBlue40},
{50, cros_tokens::kCrosRefBlue50},
{60, cros_tokens::kCrosRefBlue60},
{70, cros_tokens::kCrosRefBlue70},
{80, cros_tokens::kCrosRefBlue80},
{90, cros_tokens::kCrosRefBlue90},
{95, cros_tokens::kCrosRefBlue95},
{99, cros_tokens::kCrosRefBlue99},
{100, cros_tokens::kCrosRefBlue100}};
// For the ColorId in `data`, insert the color value from `palette` for the
// associated luma in `data`.
void InsertIntoMixer(ui::ColorMixer& mixer,
const TonalPalette& palette,
const std::array<std::pair<int, ui::ColorId>, 13>& data) {
for (const auto& entry : data) {
// Under the hood, SkColor is in ARGB like Argb from the material color
// utilities library.
SkColor color = palette.get(entry.first);
ui::ColorId color_id = entry.second;
mixer[color_id] = {color};
}
}
} // namespace
// Returns the hue angle for `seed_color`.
int HueAngle(SkColor seed_color) {
SkScalar hsv[3];
SkColorToHSV(seed_color, hsv);
// Hue is in degrees.
int hue_angle = static_cast<int>(hsv[0]);
DCHECK_LE(hue_angle, 360);
DCHECK_GE(hue_angle, 0);
return hue_angle;
}
void AddHarmonizedColors(ui::ColorMixer& mixer,
const ui::ColorProviderKey& key) {
// Zip the arrays into a map indexed by the angle lower bound.
static const base::flat_map<int, HarmonizedSeeds> kSeedMap = MakeMap();
HarmonizedSeeds seeds;
if (!key.user_color) {
// If there's no seed color, always use the last one.
auto last = kSeedMap.end();
--last;
seeds = last->second;
} else {
int angle = HueAngle(*key.user_color);
DCHECK_LT(angle, 360);
auto iter = kSeedMap.upper_bound(angle);
DCHECK(iter != kSeedMap.end());
seeds = iter->second;
}
InsertIntoMixer(mixer, TonalPalette(seeds.red), kRedIds);
InsertIntoMixer(mixer, TonalPalette(seeds.green), kGreenIds);
InsertIntoMixer(mixer, TonalPalette(seeds.blue), kBlueIds);
InsertIntoMixer(mixer, TonalPalette(seeds.yellow), kYellowIds);
}
} // namespace ash
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