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# MergeRequestTabs
#
# Handles persisting and restoring the current tab selection and lazily-loading
# content on the MergeRequests#show page.
#
# ### Example Markup
#
# <ul class="nav nav-tabs merge-request-tabs">
# <li class="notes-tab active">
# <a data-action="notes" data-target="#notes" data-toggle="tab" href="/foo/bar/merge_requests/1">
# Discussion
# </a>
# </li>
# <li class="commits-tab">
# <a data-action="commits" data-target="#commits" data-toggle="tab" href="/foo/bar/merge_requests/1/commits">
# Commits
# </a>
# </li>
# <li class="diffs-tab">
# <a data-action="diffs" data-target="#diffs" data-toggle="tab" href="/foo/bar/merge_requests/1/diffs">
# Diffs
# </a>
# </li>
# </ul>
#
# <div class="tab-content">
# <div class="notes tab-pane active" id="notes">
# Notes Content
# </div>
# <div class="commits tab-pane" id="commits">
# Commits Content
# </div>
# <div class="diffs tab-pane" id="diffs">
# Diffs Content
# </div>
# </div>
#
# <div class="mr-loading-status">
# <div class="loading">
# Loading Animation
# </div>
# </div>
#
class @MergeRequestTabs
diffsLoaded: false
commitsLoaded: false
constructor: (@opts = {}) ->
# Store the `location` object, allowing for easier stubbing in tests
@_location = location
@bindEvents()
@activateTab(@opts.action)
bindEvents: ->
$(document).on 'shown.bs.tab', '.merge-request-tabs a[data-toggle="tab"]', @tabShown
tabShown: (event) =>
$target = $(event.target)
action = $target.data('action')
if action == 'commits'
@loadCommits($target.attr('href'))
else if action == 'diffs'
@loadDiff($target.attr('href'))
@setCurrentAction(action)
scrollToElement: (container) ->
if window.location.hash
top = $(container + " " + window.location.hash).offset().top
$('body').scrollTo(top);
# Activate a tab based on the current action
activateTab: (action) ->
action = 'notes' if action == 'show'
$(".merge-request-tabs a[data-action='#{action}']").tab('show')
# Replaces the current Merge Request-specific action in the URL with a new one
#
# If the action is "notes", the URL is reset to the standard
# `MergeRequests#show` route.
#
# Examples:
#
# location.pathname # => "/namespace/project/merge_requests/1"
# setCurrentAction('diffs')
# location.pathname # => "/namespace/project/merge_requests/1/diffs"
#
# location.pathname # => "/namespace/project/merge_requests/1/diffs"
# setCurrentAction('notes')
# location.pathname # => "/namespace/project/merge_requests/1"
#
# location.pathname # => "/namespace/project/merge_requests/1/diffs"
# setCurrentAction('commits')
# location.pathname # => "/namespace/project/merge_requests/1/commits"
#
# Returns the new URL String
setCurrentAction: (action) =>
# Normalize action, just to be safe
action = 'notes' if action == 'show'
# Remove a trailing '/commits' or '/diffs'
new_state = @_location.pathname.replace(/\/(commits|diffs)(\.html)?\/?$/, '')
# Append the new action if we're on a tab other than 'notes'
unless action == 'notes'
new_state += "/#{action}"
# Ensure parameters and hash come along for the ride
new_state += @_location.search + @_location.hash
# Replace the current history state with the new one without breaking
# Turbolinks' history.
#
# See https://github.com/rails/turbolinks/issues/363
history.replaceState {turbolinks: true, url: new_state}, document.title, new_state
new_state
loadCommits: (source) ->
return if @commitsLoaded
@_get
url: "#{source}.json"
success: (data) =>
document.getElementById('commits').innerHTML = data.html
$('.js-timeago').timeago()
@commitsLoaded = true
@scrollToElement(".commits")
loadDiff: (source) ->
return if @diffsLoaded
@_get
url: "#{source}.json" + @_location.search
success: (data) =>
document.getElementById('diffs').innerHTML = data.html
@diffsLoaded = true
@scrollToElement(".diffs")
toggleLoading: ->
$('.mr-loading-status .loading').toggle()
_get: (options) ->
defaults = {
beforeSend: @toggleLoading
complete: @toggleLoading
dataType: 'json'
type: 'GET'
}
options = $.extend({}, defaults, options)
$.ajax(options)
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