Files
mantra-kmp/composeApp/build.gradle.kts
Kgothatso Ngako 05e80bf099 feat: hold every screen's content to a readable line, and centre it in the window
Phase 6, step 5, first half. Every one of the 40 screens rendered a single column
that filled whatever width it was given, so on a 1800dp desktop window a
paragraph became a 1800dp line -- long enough that the eye loses the start of the
next one -- and a six-character text field stretched to 1700dp.

M3: *"across all breakpoints, adjust margins and type styles to keep text between
40–60 characters per line."*

**The measure is derived, not written down.** `readableContentWidth()` is
`bodyLarge`'s font size converted through the current density, times half an em
per character, times sixty: 480dp at the default text size. Writing `480.dp`
instead would be the same number today and wrong for anybody who has turned text
size up -- at 200% the same column holds thirty characters, silently, because the
text still fits. Deriving it means the column widens with the type and keeps its
sixty. `AverageCharacterAdvance` is the one estimate in it, named and documented,
because a proportional face has no character width and half an em is the standard
figure for mixed-case Latin prose.

Only the ceiling is enforced. The floor needs nothing: a 400dp compact window
less its two 16dp margins holds about 46 characters, which is inside the range,
and no cap can add characters to a window that has none. There is a test for
exactly that, so the claim is checked rather than asserted in a comment.

**The column is centred; the text is not.** Those are opposite things and it is
worth being explicit, because "centre it" is how the second one gets done by
accident. A centred column still has one straight leading edge for every row,
avatar and icon to align to, which is what the grids-and-spacing page asks for.
Centred text has none. The 91 `TextAlign.Center` uses are a separate question and
a separate commit.

**Applied at 49 sites in one pass**, at the point every screen consumes its
`Scaffold`'s padding -- the one place in each file that is reliably the top of the
content. Below 480dp it is not a cap, an inset or a centring; it is nothing, so
no phone layout moves.

**Verified by measuring a real composition, not by reading the code.**
`readableContent()` is `fillMaxWidth` then `wrapContentWidth` then `widthIn`, and
every permutation of those three compiles and renders something that looks right
in a phone-width preview. This needed `compose.desktop.uiTestJUnit4` in `jvmTest`
-- pinned to the same 1.11.1 as the rest of Compose Multiplatform, test-only --
and `runDesktopComposeUiTest(width = 1400)`, which gives a window that genuinely
is 1400 pixels across at density 1.

Four assertions, and they bite: swapping the last two modifiers makes the
1400dp case report `Actual width is 1400.0.dp, expected 480.0.dp`, which is the
"centred but never capped" failure the doc comment names. The same test also
pins `currentBreakpoint()` to the real window at all five widths -- 400, 700,
1000, 1400, 1800 -- with the screen margin following. A version of it that
measured the parent's constraints rather than the window would answer `Compact`
everywhere and pass every unit test in the suite.

37 theme tests green; android and desktop both compile.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-08 07:31:33 +02:00

234 lines
9.1 KiB
Kotlin

import org.jetbrains.compose.desktop.application.dsl.TargetFormat
import org.jetbrains.kotlin.gradle.dsl.JvmTarget
plugins {
alias(libs.plugins.androidApplication)
// alias(libs.plugins.androidx.room)
alias(libs.plugins.androidx.room3)
alias(libs.plugins.kotlinMultiplatform)
alias(libs.plugins.composeMultiplatform)
alias(libs.plugins.composeCompiler)
alias(libs.plugins.composeHotReload)
alias(libs.plugins.kotlinPluginSerialization)
alias(libs.plugins.ksp)
// No sqldelight plugin here on purpose. The fr.acinq.phoenix.db.sqldelight databases this
// module used to generate are the same three lightning-kmp-app's :library generates from an
// identical copy of the .sq sources, and nothing under press.mantra touches them. Generating
// them on both sides put every generated class in the apk twice, which debug tolerates and
// mergeDexRelease rejects as duplicate types. The library's copies are the ones that count.
}
kotlin {
compilerOptions {
freeCompilerArgs.add("-Xexpect-actual-classes")
}
androidTarget {
compilerOptions {
jvmTarget.set(JvmTarget.JVM_21)
}
}
// Declared only on a mac, mirroring the gate lightning-kmp-app's :library applies to its own ios
// targets. Down the composite chain secp256k1-kmp declares a libsecp256k1 cinterop, which makes
// gradle switch off klib cross compilation for apple targets, so on a linux/windows host nothing
// in the build tree offers an ios variant of fr.acinq.phoenix:lightning-kmp-app. Declaring these
// targets anyway leaves every ios compilation unable to resolve it and fails the build outright.
// Building an ios binary needs a mac regardless.
if (org.gradle.internal.os.OperatingSystem.current().isMacOsX) {
listOf(
iosArm64(),
iosSimulatorArm64()
).forEach { iosTarget ->
iosTarget.binaries.framework {
baseName = "ComposeApp"
isStatic = true
}
}
}
jvm()
sourceSets {
androidMain.dependencies {
// The android secp256k1 natives. Nothing pulls these in transitively: lightning-kmp-core
// publishes no android variant, so the android target resolves it to the jvm one, which
// asks for secp256k1-kmp-jni-jvm and gets desktop .so/.dylib/.dll files that cannot load
// on a device. The app has to name the android artifact itself.
//
// Resolved from source via the composite build, not from Maven Central -- bitcoin-kmp's
// settings.gradle.kts substitutes this coordinate for secp256k1-kmp's :jni:android. That
// matters: the stock artifact has no ChillDKG module, so ChillDKG would compile and then
// fail with UnsatisfiedLinkError. The version is never resolved; substitution matches on
// group:name.
implementation("fr.acinq.secp256k1:secp256k1-kmp-jni-android:0.24.0")
implementation(libs.androidx.activity.compose)
// implementation(libs.androidx.room.sqlite.wrapper)
implementation(libs.compose.uiToolingPreview)
implementation(libs.sqldelight.android.driver)
}
commonMain.dependencies {
implementation(libs.androidx.datastore)
implementation(libs.androidx.datastore.preferences)
implementation(libs.androidx.lifecycle.viewmodelCompose)
implementation(libs.androidx.lifecycle.runtimeCompose)
// implementation(libs.androidx.room.runtime)
implementation(libs.androidx.room3.runtime)
implementation(libs.androidx.sqlite.bundled)
implementation(libs.coil.compose)
implementation(libs.coil.network.ktor3)
implementation(libs.compose.runtime)
implementation(libs.compose.foundation)
implementation(libs.compose.material3)
implementation(libs.compose.material3.adaptive)
implementation (libs.compose.material.icons.core)
implementation (libs.compose.material.icons.extended)
implementation(libs.compose.ui)
implementation(libs.compose.components.resources)
implementation(libs.compose.uiToolingPreview)
implementation(libs.kermit)
implementation(libs.kotlinx.datetime)
implementation(libs.kotlinx.serialization.json)
implementation(libs.kotlinx.serialization.cbor)
implementation(libs.ktor.client.core)
implementation(libs.ktor.client.cio)
implementation(libs.ktor.client.websockets)
implementation(libs.ktor.serialization.kotlinx.json)
// implementation(libs.lightning.kmp.core)
// resolved via the lightning-kmp-app composite build (see settings.gradle.kts)
implementation("fr.acinq.phoenix:lightning-kmp-app:1.0.0")
implementation(libs.navigation.compose)
implementation(libs.okio)
implementation(libs.qrose)
implementation(libs.sqldelight.runtime)
implementation(libs.sqldelight.coroutines.extensions)
implementation(libs.vitorpamplona.quartz)
}
commonTest.dependencies {
implementation(libs.kotlin.test)
// runTest: the DAO, model and relay layers are all suspending, and there is no
// runBlocking in a common source set — so anything worth asserting about them
// needs a coroutine, and a scheduler, to assert it in.
implementation(libs.kotlinx.coroutinesTest)
}
jvmTest.dependencies {
// A layout modifier cannot be asserted by reading it. `readableContent()` is
// three modifiers whose order decides whether the content is capped, centred,
// both or neither, and every ordering compiles and renders something -- so the
// check has to be a measurement of a real composition. Pinned to the same
// version as the rest of Compose Multiplatform; test-only.
implementation(compose.desktop.uiTestJUnit4)
implementation(libs.kotlin.testJunit)
}
jvmMain.dependencies {
implementation(compose.desktop.currentOs)
implementation(libs.kotlinx.coroutinesSwing)
// The jvm counterpart to sqldelight-android-driver / -native-driver above.
implementation(libs.sqldelight.sqlite.driver)
}
// Only exists when the ios targets above were declared; the default hierarchy template
// creates this source set from them.
if (org.gradle.internal.os.OperatingSystem.current().isMacOsX) {
iosMain.dependencies {
implementation(libs.sqldelight.native.driver)
}
}
}
}
android {
namespace = "press.mantra.android"
compileSdk = libs.versions.android.compileSdk.get().toInt()
buildFeatures {
buildConfig = true
}
defaultConfig {
applicationId = "press.mantra.android"
minSdk = libs.versions.android.minSdk.get().toInt()
targetSdk = libs.versions.android.targetSdk.get().toInt()
versionCode = 1
versionName = "0.1.0"
}
packaging {
resources {
excludes += "/META-INF/{AL2.0,LGPL2.1}"
excludes += "META-INF/versions/9/OSGI-INF/MANIFEST.MF"
}
}
buildTypes {
getByName("release") {
isMinifyEnabled = false
}
getByName("debug") {
applicationIdSuffix = ".debug"
versionNameSuffix = "-DEBUG"
}
}
compileOptions {
sourceCompatibility = JavaVersion.VERSION_21
targetCompatibility = JavaVersion.VERSION_21
}
testOptions {
unitTests {
// Quartz logs through android.util.Log on the error paths -- parsing a
// malformed event, for one. Unmocked, those methods throw, so a test
// covering such a path fails on the log line rather than on what it
// came to check. Default values let the code under test carry on.
isReturnDefaultValues = true
}
}
}
dependencies {
debugImplementation(libs.compose.uiTooling)
// ksp(libs.androidx.room3.compiler)
add("kspAndroid", libs.androidx.room3.compiler)
// These configurations only exist when the ios targets are declared, which the kotlin block
// above does only on a mac.
if (org.gradle.internal.os.OperatingSystem.current().isMacOsX) {
add("kspIosSimulatorArm64", libs.androidx.room3.compiler)
// add("kspIosX64", libs.androidx.room.compiler)
add("kspIosArm64", libs.androidx.room3.compiler)
}
add("kspJvm", libs.androidx.room3.compiler)
// Add any other platform target you use in your project, for example kspDesktop
}
room3 {
schemaDirectory("$projectDir/schemas")
}
compose.desktop {
application {
mainClass = "press.mantra.desktop.MainKt"
nativeDistributions {
targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
packageName = "press.mantra.desktop"
packageVersion = "1.0.0"
}
}
}