(sizing)
buf = ActionBuffer!
popup = BufferPopup buf
buf\append 'a somewhat longer popup message'
popup\show widget, pointing_to: {x: 1, y: 1, height: 1}
assert.is_true popup.width >= width_of(popup, 'a somewhat longer popup message')
popup\release!
grows as the buffer changes while showing
buf = ActionBuffer!
buf\append 'short'
popup = BufferPopup buf
popup\show widget, pointing_to: {x: 1, y: 1, height: 1}
height = popup.height
buf\append '\na somewhat longer second line'
assert.is_true popup.width >= width_of(popup, 'a somewhat longer second line')
assert.is_true popup.height > height
popup\release!
buf = ActionBuffer!
buf\append 'short'
popup = BufferPopup buf
popup\show widget
buf\append ' and then some more'
assert.is_true popup.width >= width_of(popup, 'short and then some more')
popup\release!
follows the buffer when the buffer is switched
popup = BufferPopup ActionBuffer!
buf = ActionBuffer!
buf\append 'a somewhat longer popup message'
popup.buffer = buf
assert.is_true popup.width >= width_of(popup, 'a somewhat longer popup message')
popup\release!
makes room for the line numbers
buf = ActionBuffer!
buf.text = 'a somewhat longer popup message'
popup = BufferPopup buf, show_line_numbers: true
gutter_width = popup.view.gutter_width
assert.is_true gutter_width > 0
assert.is_true popup.width >= width_of(popup, buf.text) + gutter_width
popup\release!
(.. when showing some lines around a middle line)
local lines
before_each ->
lines = ['short' for _ = 1, 30]
popup_for = (text_lines) ->
buf = ActionBuffer!
buf.text = table.concat text_lines, '\n'
BufferPopup buf, show_lines: 10, middle_visible_line: 20
fits the lines it shows
lines[20] = 'a much longer line than the others'
popup = popup_for lines
assert.is_true popup.width >= width_of(popup, lines[20])
popup\release!
ignores the lines it does not show
lines[1] = 'a much longer line than the others'
popup = popup_for lines
assert.is_true popup.width < width_of(popup, lines[1])
popup\release!
(resource management)
buf = ActionBuffer!
o = BufferPopup buf
list = setmetatable {o}, __mode: 'v'
o\release!
o = nil
collectgarbage!
assert.is_nil list[1]
stops listening to the buffer when released
buf = ActionBuffer!
popup = BufferPopup buf
listener = popup._listener
popup\release!
listeners = [l for l in *buf._buffer.listeners when l == listener]
assert.same {}, listeners
