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GTextEditor: Support forward delete/merge with the Delete key.

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This commit is contained in:
Andreas Kling 2019-03-07 16:33:07 +01:00
parent ac78cdae46
commit a64b71fb3d
1 changed files with 25 additions and 1 deletions
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26
LibGUI/GTextEditor.cpp
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@ -190,20 +190,42 @@ void GTextEditor::keydown_event(GKeyEvent& event)
if (m_cursor.column() > 0) {
// Backspace within line
current_line().remove(m_cursor.column() - 1);
update_scrollbar_ranges();
set_cursor(m_cursor.line(), m_cursor.column() - 1);
}
if (m_cursor.column() == 0 && m_cursor.line() != 0) {
// Erase at column 0; merge with previous line
// Backspace at column 0; merge with previous line
auto& previous_line = *m_lines[m_cursor.line() - 1];
int previous_length = previous_line.length();
previous_line.append(current_line().characters(), current_line().length());
m_lines.remove(m_cursor.line());
update_scrollbar_ranges();
update();
set_cursor(m_cursor.line() - 1, previous_length);
}
return;
}
if (!event.modifiers() && event.key() == KeyCode::Key_Delete) {
if (m_cursor.column() < current_line().length()) {
// Delete within line
current_line().remove(m_cursor.column());
update_scrollbar_ranges();
update_cursor();
}
if (m_cursor.column() == (current_line().length() + 1) && m_cursor.line() != line_count() - 1) {
// Delete at end of line; merge with next line
auto& next_line = *m_lines[m_cursor.line() + 1];
int previous_length = current_line().length();
current_line().append(next_line.characters(), next_line.length());
m_lines.remove(m_cursor.line() + 1);
update_scrollbar_ranges();
update();
set_cursor(m_cursor.line(), previous_length);
}
return;
}
if (!event.text().is_empty())
insert_at_cursor(event.text()[0]);
@ -256,6 +278,8 @@ Rect GTextEditor::line_widget_rect(int line_index) const
rect.move_by(-(m_horizontal_scrollbar->value() - padding()), -(m_vertical_scrollbar->value() - padding()));
rect.set_width(rect.width() + 1); // Add 1 pixel for when the cursor is on the end.
rect.intersect(this->rect());
// This feels rather hackish, but extend the rect to the edge of the content view:
rect.set_right(m_vertical_scrollbar->relative_rect().left() - 1);
return rect;
}