1 files changed, 153 insertions, 0 deletions
diff --git a/wallet/src/main/java/net/taler/wallet/compose/QrCodeUriComposable.kt b/wallet/src/main/java/net/taler/wallet/compose/QrCodeUriComposable.kt
new file mode 100644
index 0000000..4991094
--- /dev/null
+++ b/wallet/src/main/java/net/taler/wallet/compose/QrCodeUriComposable.kt
@@ -0,0 +1,153 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2022 Taler Systems S.A.
+ *
+ * GNU Taler 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, or (at your option) any later version.
+ *
+ * GNU Taler 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
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.wallet.compose
+
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.horizontalScroll
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.ColumnScope
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ContentCopy
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonColors
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.produceState
+import androidx.compose.ui.Alignment.Companion.CenterHorizontally
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.platform.LocalConfiguration
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalInspectionMode
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.min
+import androidx.core.content.getSystemService
+import net.taler.common.QrCodeManager
+import net.taler.wallet.R
+
+@Composable
+fun ColumnScope.QrCodeUriComposable(
+    talerUri: String,
+    clipBoardLabel: String,
+    buttonText: String = stringResource(R.string.copy),
+    inBetween: (@Composable ColumnScope.() -> Unit)? = null,
+) {
+    val qrCodeSize = getQrCodeSize()
+    val qrPlaceHolder = if (LocalInspectionMode.current) {
+        QrCodeManager.makeQrCode(talerUri, qrCodeSize.value.toInt()).asImageBitmap()
+    } else null
+    val qrState = produceState(qrPlaceHolder) {
+        value = QrCodeManager.makeQrCode(talerUri, qrCodeSize.value.toInt()).asImageBitmap()
+    }
+    qrState.value?.let { qrCode ->
+        Image(
+            modifier = Modifier
+                .size(qrCodeSize)
+                .align(CenterHorizontally)
+                .padding(vertical = 8.dp),
+            bitmap = qrCode,
+            contentDescription = stringResource(id = R.string.button_scan_qr_code),
+        )
+    }
+    if (inBetween != null) inBetween()
+    val scrollState = rememberScrollState()
+    Box(modifier = Modifier.padding(16.dp)) {
+        Text(
+            modifier = Modifier.horizontalScroll(scrollState),
+            fontFamily = FontFamily.Monospace,
+            style = MaterialTheme.typography.bodyLarge,
+            text = talerUri,
+        )
+    }
+    Row(
+        modifier = Modifier
+            .padding(horizontal = 16.dp)
+            .fillMaxWidth(),
+        horizontalArrangement = Arrangement.SpaceEvenly,
+    ) {
+        CopyToClipboardButton(
+            label = clipBoardLabel,
+            content = talerUri,
+            buttonText = buttonText,
+            colors = ButtonDefaults.buttonColors(
+                containerColor = MaterialTheme.colorScheme.primaryContainer,
+                contentColor = MaterialTheme.colorScheme.onPrimaryContainer
+            )
+        )
+        ShareButton(
+            content = talerUri,
+            colors = ButtonDefaults.buttonColors(
+                containerColor = MaterialTheme.colorScheme.primaryContainer,
+                contentColor = MaterialTheme.colorScheme.onPrimaryContainer
+            )
+        )
+    }
+}
+
+@Composable
+fun getQrCodeSize(): Dp {
+    val configuration = LocalConfiguration.current
+    val screenHeight = configuration.screenHeightDp.dp
+    val screenWidth = configuration.screenWidthDp.dp
+    return min(screenHeight, screenWidth)
+}
+
+@Composable
+fun CopyToClipboardButton(
+    label: String,
+    content: String,
+    modifier: Modifier = Modifier,
+    buttonText: String = stringResource(R.string.copy),
+    colors: ButtonColors = ButtonDefaults.buttonColors(),
+) {
+    val context = LocalContext.current
+    Button(
+        modifier = modifier,
+        colors = colors,
+        onClick = { copyToClipBoard(context, label, content) },
+    ) {
+        Icon(
+            Icons.Default.ContentCopy,
+            buttonText,
+            modifier = Modifier.size(ButtonDefaults.IconSize),
+        )
+        Spacer(Modifier.size(ButtonDefaults.IconSpacing))
+        Text(buttonText)
+    }
+}
+
+fun copyToClipBoard(context: Context, label: String, str: String) {
+    val clipboard = context.getSystemService<ClipboardManager>()
+    val clip = ClipData.newPlainText(label, str)
+    clipboard?.setPrimaryClip(clip)
+}