updateEditingValue method
Requests that this client update its editing state to the given value.
The new value
is treated as user input and thus may subject to input
formatting.
Implementation
@override
void updateEditingValue(TextEditingValue value) {
if (!shouldCreateInputConnection) {
return;
}
if (_lastKnownRemoteTextEditingValue == value) {
// There is no difference between this value and the last known value.
return;
}
// Check if only composing range changed.
if (_lastKnownRemoteTextEditingValue!.text == value.text &&
_lastKnownRemoteTextEditingValue!.selection == value.selection) {
// This update only modifies composing range. Since we don't keep track
// of composing range we just need to update last known value here.
// This check fixes an issue on Android when it sends
// composing updates separately from regular changes for text and
// selection.
_lastKnownRemoteTextEditingValue = value;
return;
}
final effectiveLastKnownValue = _lastKnownRemoteTextEditingValue!;
_lastKnownRemoteTextEditingValue = value;
final oldText = effectiveLastKnownValue.text;
final text = value.text;
final cursorPosition = value.selection.extentOffset;
final diff = getDiff(oldText, text, cursorPosition);
if (diff.deleted.isEmpty && diff.inserted.isEmpty) {
widget.controller.updateSelection(value.selection, ChangeSource.local);
} else {
widget.controller.replaceText(diff.start, diff.deleted.length, diff.inserted, value.selection);
}
}