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Place cursor at the start of input after evaluating

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closes #151
This commit is contained in:
Sad Ellie 2024-01-07 01:01:36 +03:00
parent f88fba44bb
commit caa2979d42
1 changed files with 18 additions and 5 deletions
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23
feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorViewModel.kt
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@ -116,12 +116,16 @@ internal class CalculatorViewModel @Inject constructor(
.stateIn(viewModelScope, CalculatorUIState.Loading)
fun addTokens(tokens: String) = _input.update {
val newValue = if (_equalClicked.value and Token.Digit.allWithDot.contains(tokens)) {
var newValue = if (_equalClicked.value and Token.Digit.allWithDot.contains(tokens)) {
// Clean input after clicking "=" and any token that is a Digit
TextFieldValue().addTokens(tokens)
} else {
it.addTokens(tokens)
}
// Cursor is set to 0 when equal is clicked
if (_equalClicked.value) {
newValue = newValue.copy(selection = TextRange(it.text.length))
}
_equalClicked.update { false }
_fractionJob?.cancel()
savedStateHandle[_inputKey] = newValue.text
@ -129,7 +133,11 @@ internal class CalculatorViewModel @Inject constructor(
}
fun addBracket() = _input.update {
val newValue = it.addBracket()
var newValue = it.addBracket()
// Cursor is set to 0 when equal is clicked
if (_equalClicked.value) {
newValue = newValue.copy(selection = TextRange(it.text.length))
}
_equalClicked.update { false }
_fractionJob?.cancel()
savedStateHandle[_inputKey] = newValue.text
@ -138,7 +146,7 @@ internal class CalculatorViewModel @Inject constructor(
fun deleteTokens() = _input.update {
val newValue = if (_equalClicked.value) {
TextFieldValue().deleteTokens()
TextFieldValue()
} else {
it.deleteTokens()
}
@ -155,7 +163,12 @@ internal class CalculatorViewModel @Inject constructor(
TextFieldValue()
}
fun onCursorChange(selection: TextRange) = _input.update { it.copy(selection = selection) }
fun onCursorChange(selection: TextRange) = _input.update {
// Without this line: will place token (even in the middle of the input) and place cursor at
// the end. This line also removes fractional output once user touches input text field
_equalClicked.update { false }
it.copy(selection = selection)
}
fun updateRadianMode(newValue: Boolean) = viewModelScope.launch {
userPrefsRepository.updateRadianMode(newValue)
@ -203,7 +216,7 @@ internal class CalculatorViewModel @Inject constructor(
_fractionJob = launch(Dispatchers.Default) {
val fraction = result.toFractionalString()
_input.update { TextFieldValue(resultFormatted, TextRange(resultFormatted.length)) }
_input.update { TextFieldValue(resultFormatted, TextRange.Zero) }
_result.update { CalculationResult.Fraction(fraction) }
}
}