fix: add clear line content in task steps (#9)

* fix: close #8

Erase the end of the line after changing cursor position and before
printing new text in task component.

Refs: #8

* chore: update the README.md

update the task example in `README.md` using the example provided in the
example directory (`example/task.dart`).

Author: LouisP0

README.md

@@ -106,21 +106,19 @@ Future<String> sleepWithValue() =>
 
 Future<void> main() async {
   final commander = Commander(level: Level.verbose);
-  print('Hello World !');
 
-  final successTask =
-  await commander.task('I am an success task', colored: true);
+  final successTask = await commander.task();
   await successTask.step('Success step 1', callback: sleepWithValue);
   await successTask.step('Success step 2', callback: sleep);
   successTask.success('Success task data are available !');
 
-  final warnTask = await commander.task('I am an warn task');
+  final warnTask = await commander.task();
   await warnTask.step('Warn step 1', callback: sleepWithValue);
   await warnTask.step('Warn step 2', callback: sleep);
   await warnTask.step('Warn step 3', callback: sleep);
   warnTask.warn('Warn task !');
 
-  final errorTask = await commander.task('I am an error task');
+  final errorTask = await commander.task();
   await errorTask.step('Error step 1', callback: sleepWithValue);
   await errorTask.step('Error step 2', callback: sleep);
   await errorTask.step('Error step 3', callback: sleep);

lib/src/application/components/task.dart

@@ -56,6 +56,7 @@ final class StepManager with TerminalTools {
 
         buffer.writeAnsiAll([
           CursorPosition.moveToColumn(_position!.$1),
+          Clear.untilEndOfLine,
           ..._theme.loadingSymbolColor,
           Print(_theme.loadingSymbols[_loadingStep]),
           SetStyles.reset
@@ -78,6 +79,7 @@ final class StepManager with TerminalTools {
 
     buffer.writeAnsiAll([
       CursorPosition.moveTo(_position!.$2 + _lineCount, _position!.$1),
+      Clear.untilEndOfLine,
       ..._theme.successPrefixColor,
       Print(_theme.successPrefix),
       SetStyles.reset,
@@ -98,6 +100,7 @@ final class StepManager with TerminalTools {
 
     buffer.writeAnsiAll([
       CursorPosition.moveTo(_position!.$2 + _lineCount, _position!.$1),
+      Clear.untilEndOfLine,
       ..._theme.warningPrefixColor,
       Print(_theme.warningPrefix),
       SetStyles.reset,
@@ -118,6 +121,7 @@ final class StepManager with TerminalTools {
 
     buffer.writeAnsiAll([
       CursorPosition.moveTo(_position!.$2 + _lineCount, _position!.$1),
+      Clear.untilEndOfLine,
       ..._theme.errorPrefixColor,
       Print(_theme.errorPrefix),
       SetStyles.reset,