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LibGUI: Add Ctrl-H to insert mode

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In Vim, Ctrl-H is effectively equivalent to backspace in insert mode, as
it deletes the previous character.

This commit implements method delete_previous_char() to TextEditor.
delete_char() already exists in EditingEngine, but it deletes the
next character rather than the previous. delete_previous_char() is then
called from within VimEditingEngine.
This commit is contained in:
Ariel Don 2021-07-15 15:50:03 -05:00 • committed by Gunnar Beutner
parent 808e5e813f
commit 8230bf8944
3 changed files with 21 additions and 0 deletions
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17
Userland/Libraries/LibGUI/TextEditor.cpp
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@ -911,6 +911,23 @@ void TextEditor::delete_current_line()
execute<RemoveTextCommand>(document().text_in_range(erased_range), erased_range);
}
void TextEditor::delete_previous_char()
{
if (!is_editable())
return;
if (has_selection())
return delete_selection();
TextRange to_erase({ m_cursor.line(), m_cursor.column() - 1 }, m_cursor);
if (m_cursor.column() == 0 && m_cursor.line() != 0) {
size_t prev_line_len = line(m_cursor.line() - 1).length();
to_erase.set_start({ m_cursor.line() - 1, prev_line_len });
}
execute<RemoveTextCommand>(document().text_in_range(to_erase), to_erase);
}
void TextEditor::do_delete()
{
if (!is_editable())