Node / meshtastic / Meshtastic-Android / files / core / ui / src / commonTest / kotlin / org / meshtastic / core / ui / theme / PickLegibleTest.kt

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T8b949e/*

* Copyright (c) 2026 Meshtastic LLC

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <https://www.gnu.org/licenses/>.

*/

Tff7b72package T7ee787org.meshtastic.core.ui.theme

Tff7b72import T7ee787androidx.compose.ui.graphics.Color

Tff7b72import T7ee787kotlin.test.Test

Tff7b72import T7ee787kotlin.test.assertEquals

Tff7b72import T7ee787kotlin.test.assertTrue

Tff7b72class T56d364PickLegibleTest Tb4b4b4{

Tff7b72private Tff7b72val Te6edf3fallback Tff7b72= Te6edf3ColorTb4b4b4(T79c0ff0Te6edf3xFF888888Tb4b4b4)

T8b949e// DEF CON 34's published palette, in authored order.

Tff7b72private Tff7b72val Te6edf3defconNavy Tff7b72= Te6edf3ColorTb4b4b4(T79c0ff0Te6edf3xFF0D294ATb4b4b4)

Tff7b72private Tff7b72val Te6edf3defconTeal Tff7b72= Te6edf3ColorTb4b4b4(T79c0ff0Te6edf3xFF017FA4Tb4b4b4)

Tff7b72private Tff7b72val Te6edf3defconPink Tff7b72= Te6edf3ColorTb4b4b4(T79c0ff0Te6edf3xFFE0004ETb4b4b4)

Tff7b72private Tff7b72val Te6edf3defconMint Tff7b72= Te6edf3ColorTb4b4b4(T79c0ff0Te6edf3xFF6CCDB8Tb4b4b4)

Tf0883e@Test

Tff7b72fun Td2a8ffpicksFirstCandidateThatClearsTheThresholdTb4b4b4(Tb4b4b4) Tb4b4b4{

T8b949e// On a dark surface the navy primary is invisible, so the first legible color wins instead.

Tff7b72val Te6edf3onDark Tff7b72= Te6edf3pickLegibleTb4b4b4(Te6edf3listOfTb4b4b4(Te6edf3defconNavyTb4b4b4, Te6edf3defconPinkTb4b4b4, Te6edf3defconTealTb4b4b4)Tb4b4b4, Te6edf3background Tff7b72= Te6edf3ColorTb4b4b4.Te6edf3BlackTb4b4b4, Te6edf3fallbackTb4b4b4)

Te6edf3assertEqualsTb4b4b4(Te6edf3defconPinkTb4b4b4, Te6edf3onDarkTb4b4b4)

Te6edf3assertTrueTb4b4b4(Te6edf3contrastRatioTb4b4b4(Te6edf3onDarkTb4b4b4, Te6edf3ColorTb4b4b4.Te6edf3BlackTb4b4b4) Tff7b72>Tff7b72= Te6edf3MIN_GRAPHICAL_CONTRASTTb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ffpicksDifferentColorsForLightAndDarkBackgroundsTb4b4b4(Tb4b4b4) Tb4b4b4{

T8b949e// Same palette, opposite surfaces: mint reads on black but not on white; navy is the reverse.

Te6edf3assertEqualsTb4b4b4(Te6edf3defconMintTb4b4b4, Te6edf3pickLegibleTb4b4b4(Te6edf3listOfTb4b4b4(Te6edf3defconMintTb4b4b4, Te6edf3defconNavyTb4b4b4)Tb4b4b4, Te6edf3background Tff7b72= Te6edf3ColorTb4b4b4.Te6edf3BlackTb4b4b4, Te6edf3fallbackTb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(Te6edf3defconNavyTb4b4b4, Te6edf3pickLegibleTb4b4b4(Te6edf3listOfTb4b4b4(Te6edf3defconMintTb4b4b4, Te6edf3defconNavyTb4b4b4)Tb4b4b4, Te6edf3background Tff7b72= Te6edf3ColorTb4b4b4.Te6edf3WhiteTb4b4b4, Te6edf3fallbackTb4b4b4)Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8fffallsBackWhenNoCandidateReadsTb4b4b4(Tb4b4b4) Tb4b4b4{

Te6edf3assertEqualsTb4b4b4(Te6edf3fallbackTb4b4b4, Te6edf3pickLegibleTb4b4b4(Te6edf3listOfTb4b4b4(Te6edf3ColorTb4b4b4.Te6edf3WhiteTb4b4b4)Tb4b4b4, Te6edf3background Tff7b72= Te6edf3ColorTb4b4b4.Te6edf3WhiteTb4b4b4, Te6edf3fallbackTb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(Te6edf3fallbackTb4b4b4, Te6edf3pickLegibleTb4b4b4(Te6edf3emptyListTb4b4b4(Tb4b4b4)Tb4b4b4, Te6edf3background Tff7b72= Te6edf3ColorTb4b4b4.Te6edf3BlackTb4b4b4, Te6edf3fallbackTb4b4b4)Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ffhonoursACustomMinimumRatioTb4b4b4(Tb4b4b4) Tb4b4b4{

T8b949e// Pink on black (~4.3:1) clears the graphical bar but not the stricter text bar.

Te6edf3assertEqualsTb4b4b4(Te6edf3defconPinkTb4b4b4, Te6edf3pickLegibleTb4b4b4(Te6edf3listOfTb4b4b4(Te6edf3defconPinkTb4b4b4)Tb4b4b4, Te6edf3ColorTb4b4b4.Te6edf3BlackTb4b4b4, Te6edf3fallbackTb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(Te6edf3fallbackTb4b4b4, Te6edf3pickLegibleTb4b4b4(Te6edf3listOfTb4b4b4(Te6edf3defconPinkTb4b4b4)Tb4b4b4, Te6edf3ColorTb4b4b4.Te6edf3BlackTb4b4b4, Te6edf3fallbackTb4b4b4, Te6edf3minRatio Tff7b72= Te6edf3MIN_TEXT_CONTRASTTb4b4b4)Tb4b4b4)

Tb4b4b4}

Tb4b4b4}