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Add a test for MarkdownToolbar's replace current line

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The logic is non trivial
This commit is contained in:
Vishesh Handa
2020-08-13 00:29:17 +02:00
parent c7a956c5bf
commit f3ad0144c5
2 changed files with 65 additions and 39 deletions
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84
lib/widgets/markdown_toolbar.dart
View File

@ -28,45 +28,7 @@ class MarkdownToolBar extends StatelessWidget {
} }
void _modifyCurrentLine(String char) { void _modifyCurrentLine(String char) {
var selection = textController.value.selection; textController.value = modifyCurrentLine(textController.value, char);
var text = textController.value.text;
print('Base offset: ${selection.baseOffset}');
print('Extent offset: ${selection.extentOffset}');
var cursorPos = selection.baseOffset;
if (cursorPos == -1) {
cursorPos = 0;
}
print('CursorPos: $cursorPos');
var lineStartPos =
text.lastIndexOf('\n', cursorPos == 0 ? 0 : cursorPos - 1);
if (lineStartPos == -1) {
lineStartPos = 0;
}
var lineEndPos = text.indexOf('\n', cursorPos);
if (lineEndPos == -1) {
lineEndPos = text.length;
}
print('Line Start: $lineStartPos');
print('Line End: $lineEndPos');
print('Line: ${text.substring(lineStartPos, lineEndPos)}');
// Check if already present
if (text.startsWith(char, lineStartPos)) {
print('Removing `$char`');
textController.text = text.replaceFirst(char, '', lineStartPos);
textController.selection =
TextSelection.collapsed(offset: cursorPos - char.length);
return;
}
print('Adding `$char`');
textController.text = text.replaceRange(lineStartPos, lineStartPos, char);
textController.selection =
TextSelection.collapsed(offset: cursorPos + char.length);
} }
void _modifyCurrentWord(String char) { void _modifyCurrentWord(String char) {
@ -117,3 +79,47 @@ class MarkdownToolBar extends StatelessWidget {
print('$char'); print('$char');
} }
} }
TextEditingValue modifyCurrentLine(
TextEditingValue textEditingValue,
String char,
) {
var selection = textEditingValue.selection;
var text = textEditingValue.text;
//print('Base offset: ${selection.baseOffset}');
//print('Extent offset: ${selection.extentOffset}');
var cursorPos = selection.baseOffset;
if (cursorPos == -1) {
cursorPos = 0;
}
//print('CursorPos: $cursorPos');
var lineStartPos = text.lastIndexOf('\n', cursorPos == 0 ? 0 : cursorPos - 1);
if (lineStartPos == -1) {
lineStartPos = 0;
}
var lineEndPos = text.indexOf('\n', cursorPos);
if (lineEndPos == -1) {
lineEndPos = text.length;
}
//print('Line Start: $lineStartPos');
//print('Line End: $lineEndPos');
//print('Line: ${text.substring(lineStartPos, lineEndPos)}');
// Check if already present
if (text.startsWith(char, lineStartPos)) {
//print('Removing `$char`');
return TextEditingValue(
text: text.replaceFirst(char, '', lineStartPos),
selection: TextSelection.collapsed(offset: cursorPos - char.length),
);
}
return TextEditingValue(
text: text.replaceRange(lineStartPos, lineStartPos, char),
selection: TextSelection.collapsed(offset: cursorPos + char.length),
);
}

20
test/markdown_toolbar_test.dart Normal file
View File

@ -0,0 +1,20 @@
import 'package:flutter/material.dart';
import 'package:test/test.dart';
import 'package:gitjournal/widgets/markdown_toolbar.dart';
void main() {
test('Adds a header to the first line correctly', () {
var val = const TextEditingValue(
text: 'Hello',
selection: TextSelection.collapsed(offset: 5),
);
var expectedVal = const TextEditingValue(
text: '# Hello',
selection: TextSelection.collapsed(offset: 7),
);
expect(modifyCurrentLine(val, '# '), expectedVal);
});
}