howl.ui.theme

register(name, file)

adds name to .all

file = File 'test'
theme.register 'test', file
assert.equal theme.all.test, file

raises an error if name is omitted

status, msg = pcall theme.register, nil, File 'foo'
assert.is_false(status)
assert.match msg, 'name'

raises an error if file is omitted

status, msg = pcall theme.register, 'test'
assert.is_false(status)
assert.match msg, 'file'

unregister(name)

removes the theme from all

file = File 'tmp'
theme.register 'tmp', file
theme.unregister 'tmp'
assert.is_nil theme.all.tmp

assigning a new theme to config.theme

logs an error if there's an error loading the theme

File.with_tmpfile (file) ->
  file.contents = "error('cantload')"
  theme.register 'error', file
  config.theme = 'error'
  assert.match log.last_error.message, 'cantload'

assigns the loaded theme to .current and sets .name

File.with_tmpfile (file) ->
  file.contents = serpent.dump spec_theme
  theme.register 'foo', file
  config.theme = 'foo'
  expected = theme_copy!
  expected.name = 'foo'
  assert.same theme.current, expected

emits a theme-changed event with the newly set theme

File.with_tmpfile (file) ->
  file.contents = serpent.dump spec_theme
  theme.register 'alert', file
  handler = spy.new -> true
  signal.connect 'theme-changed', handler
  config.theme = 'alert'
  signal.disconnect 'theme-changed', handler
  expected = theme_copy!
  expected.name = 'alert'
  assert.spy(handler).was_called_with theme: expected

does not propagate global assignments to the global environment

File.with_tmpfile (file) ->
  file.contents = 'spec_global = "noo!"\n' .. serpent.dump spec_theme
  theme.register 'foo', file
  config.theme = 'foo'
  assert.is_nil _G.spec_global

allows the use of named colors

File.with_tmpfile (file) ->
  theme_string = serpent.dump spec_theme
  theme_string = theme_string\gsub '"#777777"', 'violet' -- footer.color
  file.contents = theme_string
  theme.register 'colors', file
  config.theme = 'colors'
  assert.equal theme.current.editor.footer.color, '#ee82ee'

life cycle management

automatically applies a theme upon registration if that theme is already set as current

File.with_tmpfile (file) ->
  the_theme = theme_copy!
  file.contents = serpent.dump the_theme
  theme.register 'reloadme', file
  config.theme = 'reloadme'

  theme.unregister 'reloadme'
  the_theme.window.background = '#112233'
  file.contents = serpent.dump the_theme
  theme.register 'reloadme', file
  assert.equal '#112233', theme.current.window.background

keeps the loaded in-memory theme when the current is unregistered

File.with_tmpfile (file) ->
  file.contents = serpent.dump spec_theme
  theme.register 'keepme', file
  config.theme = 'keepme'
  theme.unregister 'keepme'
  assert.equal 'keepme', theme.current.name