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Code

Only generate barcode output when required

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This commit is contained in:
Markus Fisch 2022-10-19 21:45:15 +02:00
parent 972eb6a0b0
commit f28f956a8d
1 changed files with 52 additions and 30 deletions
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82
app/src/main/kotlin/de/markusfisch/android/binaryeye/fragment/BarcodeFragment.kt
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@ -38,11 +38,7 @@ class BarcodeFragment : Fragment() {
private val parentJob = Job()
private val scope = CoroutineScope(Dispatchers.IO + parentJob)
private var barcodeBitmap: Bitmap? = null
private var barcodeSvg: String? = null
private var barcodeTxt: String? = null
private var content: String = ""
private var formatName: String = ""
private lateinit var barcode: Barcode
override fun onCreate(state: Bundle?) {
super.onCreate(state)
@ -63,18 +59,13 @@ class BarcodeFragment : Fragment() {
false
)
val args = arguments ?: return view
content = args.getString(CONTENT) ?: return view
formatName = args.getString(FORMAT) ?: return view
val format = Format.valueOf(formatName)
val size = args.getInt(SIZE)
val ecLevel = args.getInt(EC_LEVEL)
val bitmap: Bitmap
try {
barcodeBitmap = ZxingCpp.encodeAsBitmap(
content, format, size, size, -1, ecLevel
barcode = arguments?.toProperties() ?: throw IllegalArgumentException(
"Illegal arguments"
)
barcodeSvg = ZxingCpp.encodeAsSvg(content, format, -1, ecLevel)
barcodeTxt = ZxingCpp.encodeAsText(content, format, -1, ecLevel)
// Catch exceptions from encoding.
bitmap = barcode.bitmap
} catch (e: Exception) {
var message = e.message
if (message == null || message.isEmpty()) {
@ -90,7 +81,7 @@ class BarcodeFragment : Fragment() {
val imageView = view.findViewById<ConfinedScalingImageView>(
R.id.barcode
)
imageView.setImageBitmap(barcodeBitmap)
imageView.setImageBitmap(bitmap)
imageView.post {
// Make sure to invoke this after ScalingImageView.onLayout().
imageView.minWidth /= 2f
@ -112,6 +103,19 @@ class BarcodeFragment : Fragment() {
return view
}
private fun Bundle.toProperties() = Barcode(
getString(CONTENT) ?: throw IllegalArgumentException(
"content cannot be null"
),
Format.valueOf(
getString(FORMAT) ?: throw IllegalArgumentException(
"format cannot be null"
)
),
getInt(SIZE),
getInt(EC_LEVEL)
)
override fun onDestroyView() {
super.onDestroyView()
parentJob.cancel()
@ -124,9 +128,9 @@ class BarcodeFragment : Fragment() {
override fun onOptionsItemSelected(item: MenuItem): Boolean {
return when (item.itemId) {
R.id.copy_to_clipboard -> {
barcodeTxt?.let {
context.copyToClipboard(it)
context.toast(R.string.copied_to_clipboard)
context.apply {
copyToClipboard(barcode.text)
toast(R.string.copied_to_clipboard)
}
true
}
@ -165,7 +169,9 @@ class BarcodeFragment : Fragment() {
}
val view = ac.layoutInflater.inflate(R.layout.dialog_save_file, null)
val editText = view.findViewById<EditText>(R.id.file_name)
editText.setText(encodeFileName("${formatName}_$content"))
editText.setText(
encodeFileName("${barcode.format}_${barcode.content}")
)
AlertDialog.Builder(ac)
.setView(view)
.setPositiveButton(android.R.string.ok) { _, _ ->
@ -175,23 +181,19 @@ class BarcodeFragment : Fragment() {
addSuffixIfNotGiven(fileName, ".png"),
MIME_PNG
) {
barcodeBitmap?.saveAsPng(it)
barcode.bitmap.saveAsPng(it)
}
FileType.SVG -> saveAs(
addSuffixIfNotGiven(fileName, ".svg"),
MIME_SVG
) { outputStream ->
barcodeSvg?.let {
outputStream.write(it.toByteArray())
}
outputStream.write(barcode.svg.toByteArray())
}
FileType.TXT -> saveAs(
addSuffixIfNotGiven(fileName, ".txt"),
MIME_TXT
) { outputStream ->
barcodeTxt?.let {
outputStream.write(it.toByteArray())
}
outputStream.write(barcode.text.toByteArray())
}
}
}
@ -216,9 +218,9 @@ class BarcodeFragment : Fragment() {
private fun Context.shareAs(fileType: FileType) {
when (fileType) {
FileType.PNG -> barcodeBitmap?.let { share(it) }
FileType.SVG -> barcodeSvg?.let { shareText(it, MIME_SVG) }
FileType.TXT -> barcodeTxt?.let { shareText(it) }
FileType.PNG -> share(barcode.bitmap)
FileType.SVG -> shareText(barcode.svg, MIME_SVG)
FileType.TXT -> shareText(barcode.text)
}
}
@ -273,6 +275,26 @@ class BarcodeFragment : Fragment() {
}
}
private data class Barcode(
val content: String,
val format: Format,
val size: Int,
val ecLevel: Int
) {
val bitmap: Bitmap
get() = ZxingCpp.encodeAsBitmap(
content, format, size, size, -1, ecLevel
)
val svg: String
get() = ZxingCpp.encodeAsSvg(
content, format, -1, ecLevel
)
val text: String
get() = ZxingCpp.encodeAsText(
content, format, -1, ecLevel
)
}
private fun Bitmap.saveAsPng(outputStream: OutputStream, quality: Int = 90) =
compress(Bitmap.CompressFormat.PNG, quality, outputStream)