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LibGUI: Shift+Tab unindents line

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Previously, pressing Shift+Tab would indent the line if no selection was
given. While with a selection, it would be unindented. With this change,
pressing Shift+Tab with no selection unindents the current line.

For this, add unindent_line() helper function. This function unindents the
current line by at most one tab width if it starts with whitespace,
regardless of cursor position.
This commit is contained in:
Julian Eigmüller 2022-10-28 14:42:32 +02:00 • committed by Andreas Kling
parent 03d0c7a5b6
commit 0ea399d8d6
2 changed files with 18 additions and 0 deletions
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17
Userland/Libraries/LibGUI/TextEditor.cpp
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@ -918,6 +918,11 @@ void TextEditor::keydown_event(KeyEvent& event)
indent_selection();
return;
}
} else {
if (event.modifiers() == Mod_Shift) {
unindent_line();
return;
}
}
}
@ -1050,6 +1055,18 @@ void TextEditor::unindent_selection()
}
}
void TextEditor::unindent_line()
{
if (current_line().first_non_whitespace_column() != 0) {
auto const unindent_size = current_line().leading_spaces() < m_soft_tab_width ? current_line().leading_spaces() : m_soft_tab_width;
auto const temp_column = m_cursor.column();
execute<UnindentSelection>(unindent_size, TextRange({ m_cursor.line(), 0 }, { m_cursor.line(), line(m_cursor.line()).length() }));
set_cursor({ m_cursor.line(), temp_column <= unindent_size ? 0 : temp_column - unindent_size });
}
}
void TextEditor::delete_previous_word()
{
TextRange to_erase(document().first_word_before(m_cursor, true), m_cursor);