line_selection.md

Line selection

The URL hash (fragment) describes the selected lines. Examples:

hash	description
#L10	single line
#L10,15,20	multiple lines
#L10-15	span of lines
#L10-15,20-25	multiple spans
#L10,15-20,30	combination of above

Clicking behaviour

What happens when a line number is clicked?

Plain click

Selection is cleared and the clicked line is selected.

The clicked line is remembered as last-clicked, used when selecting spans.

Ctrl+click

The line is added to current selection.

Examples:

Current selection	Line clicked	New selection
	10	#L10
#L10	20	#L10,20
#L10-20	30	#L10-20,30

Alt+click

If last-clicked line exists, the span between last-clicked and the clicked line is added to the selection.

Current selection	Last clicked	Line clicked	New selection
	10	20	#L10-20
#L10	15	20	#L10,15-20

Questions:

• what if last-clicked is empty?