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# Zen Mode (full screen) textarea
#
#= provides zen_mode:enter
#= provides zen_mode:leave
#
#= require jquery.scrollTo
#= require dropzone
#= require mousetrap
#= require mousetrap/pause
#
# ### Events
#
# `zen_mode:enter`
#
# Fired when the "Edit in fullscreen" link is clicked.
#
# **Synchronicity** Sync
# **Bubbles** Yes
# **Cancelable** No
# **Target** a.js-zen-enter
#
# `zen_mode:leave`
#
# Fired when the "Leave Fullscreen" link is clicked.
#
# **Synchronicity** Sync
# **Bubbles** Yes
# **Cancelable** No
# **Target** a.js-zen-leave
#
class @ZenMode
constructor: ->
@active_backdrop = null
@active_textarea = null
$(document).on 'click', '.js-zen-enter', (e) ->
e.preventDefault()
$(e.currentTarget).trigger('zen_mode:enter')
$(document).on 'click', '.js-zen-leave', (e) ->
e.preventDefault()
$(e.currentTarget).trigger('zen_mode:leave')
$(document).on 'zen_mode:enter', (e) =>
@enter($(e.target).closest('.md-area').find('.zen-backdrop'))
$(document).on 'zen_mode:leave', (e) =>
@exit()
$(document).on 'keydown', (e) ->
if e.keyCode == 27 # Esc
e.preventDefault()
$(document).trigger('zen_mode:leave')
enter: (backdrop) ->
Mousetrap.pause()
@active_backdrop = $(backdrop)
@active_backdrop.addClass('fullscreen')
@active_textarea = @active_backdrop.find('textarea')
# Prevent a user-resized textarea from persisting to fullscreen
@active_textarea.removeAttr('style')
@active_textarea.focus()
exit: ->
if @active_textarea
Mousetrap.unpause()
@active_textarea.closest('.zen-backdrop').removeClass('fullscreen')
@scrollTo(@active_textarea)
@active_textarea = null
@active_backdrop = null
Dropzone.forElement('.div-dropzone').enable()
scrollTo: (zen_area) ->
$.scrollTo(zen_area, 0, offset: -150)
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