taler-android

QrCodeUriComposable.kt (7531B)

---

 /*
  * 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.graphics.Bitmap
 import android.graphics.drawable.Drawable
 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.aspectRatio
 import androidx.compose.foundation.layout.fillMaxSize
 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.Card
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.produceState
 import androidx.compose.ui.Alignment
 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.res.painterResource
 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.ContextCompat
 import net.taler.lib.android.QrCodeManager
 import net.taler.lib.android.QrLogoSize
 import net.taler.lib.android.copyToClipBoard
 import net.taler.lib.android.AnimatedQrCodeComposable
 import net.taler.wallet.R
 
 sealed class QrCodeParams {
     data object Taler: QrCodeParams()
 
     data class Custom(
         val centerLogo: Drawable? = null,
         val centerLogoSize: QrLogoSize = QrLogoSize.MEDIUM,
         val drawCenterLogoBackground: Boolean = false,
     ): QrCodeParams()
 }
 
 @Composable
 fun ColumnScope.QrCodeUriComposable(
     modifier: Modifier = Modifier,
     qrData: String,
     clipboardLabel: String,
     params: QrCodeParams,
     buttonText: String = stringResource(R.string.copy),
     showContents: Boolean = true,
     shareAsQrCode: Boolean = false,
     inBetween: (@Composable ColumnScope.() -> Unit)? = null,
 ) {
     val context = LocalContext.current
     val qrCodeSize = getQrCodeSize()
     val qrState by produceState<Bitmap?>(null) {
         value = QrCodeManager.makeQrCode(
             qrData,
             qrCodeSize.value.toInt(),
             centerLogo = when (params) {
                 QrCodeParams.Taler -> ContextCompat.getDrawable(context, net.taler.common.R.drawable.ic_taler_logo_qr)
                 is QrCodeParams.Custom -> params.centerLogo
             },
 
             centerLogoSize = when (params) {
                 QrCodeParams.Taler -> QrLogoSize.MEDIUM
                 is QrCodeParams.Custom -> params.centerLogoSize
             },
 
             drawBackground = false,
         )
     }
 
     Box(
         modifier
             .fillMaxWidth()
             .aspectRatio(1f)
             .padding(bottom = if (showContents) 8.dp else 0.dp),
         contentAlignment = Alignment.Center,
     ) {
         when (params) {
             QrCodeParams.Taler -> {
                 AnimatedQrCodeComposable(
                     modifier = Modifier.fillMaxSize(),
                     link = qrData,
                     logoPainter = painterResource(net.taler.common.R.drawable.ic_taler_logo_qr)
                 )
             }
 
             is QrCodeParams.Custom -> {
                 qrState?.let { qrCode ->
                     Image(
                         modifier = Modifier.fillMaxSize(),
                         bitmap = qrCode.asImageBitmap(),
                         contentDescription = null,
                     )
                 }
             }
         }
     }
 
     if (inBetween != null) inBetween()
     val scrollState = rememberScrollState()
     if (showContents) {
         if (!shareAsQrCode) {
             Card(modifier = Modifier
                 .padding(horizontal = 16.dp)
                 .padding(bottom = 16.dp, top = 10.dp)) {
                 Text(
                     modifier = Modifier
                         .padding(6.dp)
                         .horizontalScroll(scrollState),
                     fontFamily = FontFamily.Monospace,
                     style = MaterialTheme.typography.bodyMedium,
                     text = qrData,
                 )
             }
         }
 
         Row(
             modifier = Modifier
                 .padding(horizontal = 16.dp)
                 .fillMaxWidth(),
             horizontalArrangement = Arrangement.SpaceEvenly,
         ) {
             if (!shareAsQrCode) {
                 CopyToClipboardButton(
                     label = clipboardLabel,
                     content = qrData,
                     buttonText = buttonText,
                     colors = ButtonDefaults.buttonColors(
                         containerColor = MaterialTheme.colorScheme.primaryContainer,
                         contentColor = MaterialTheme.colorScheme.onPrimaryContainer
                     )
                 )
             }
 
             ShareButton(
                 content = qrData,
                 shareAsQrCode = shareAsQrCode,
                 qrBitmap = qrState,
                 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)
     }
 }