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Split work into chunks to improve UI responsiveness on large repos; update sort to match GitHub's algorithm

This commit is contained in:
Buu Nguyen 2014-05-23 15:05:17 -07:00
parent 5a26a4794d
commit ebd5e74f7f
1 changed files with 44 additions and 31 deletions
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75
src/inject.js
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@ -177,8 +177,7 @@
function fetchData(repo, done) {
var github = new Github({ token: store.get(STORE_TOKEN) })
, api = github.getRepo(repo.username, repo.reponame)
, root = []
, folders = { '': root }
, folders = { '': [] }
, encodedBranch = encodeURIComponent(decodeURIComponent(repo.branch))
api.getTree(encodedBranch + '?recursive=true', function(err, tree) {
@ -187,39 +186,52 @@
fetchSubmodules(function(err, submodules) {
if (err) return done(err)
tree.forEach(function(item) {
var path = item.path
, type = item.type
, index = path.lastIndexOf('/')
, name = $dummyDiv.text(path.substring(index + 1)).html() // sanitizes, closes #9
, folder = folders[path.substring(0, index)]
// split work in chunks to prevent blocking UI on large repos
nextChunk(0)
function nextChunk(iteration) {
var chunkSize = 500
, baseIndex = iteration * chunkSize
, i
, item, path, type, index, name
folder.push(item)
item.id = PREFIX + path
item.text = name
item.icon = type // use `type` as class name for tree node
for (i = 0; i < chunkSize; i++) {
item = tree[baseIndex + i]
if (item === undefined) return done(null, sort(folders['']))
if (type === 'tree') {
folders[item.path] = item.children = []
item.a_attr = { href: '#' }
}
else if (type === 'blob') {
item.a_attr = { href: '/' + repo.username + '/' + repo.reponame + '/' + type + '/' + repo.branch + '/' + path }
}
else if (type === 'commit') {
var moduleUrl = submodules[item.path]
path = item.path
type = item.type
index = path.lastIndexOf('/')
name = $dummyDiv.text(path.substring(index + 1)).html() // sanitizes, closes #9
item.id = PREFIX + path
item.text = name
item.icon = type // use `type` as class name for tree node
// Special handling for submodules hosted in GitHub
if (~moduleUrl.indexOf('github.com')) {
item.text = '<a href="' + moduleUrl + '" class="jstree-anchor">' + name + '</a>' +
'<span>@ </span>' +
'<a href="' + moduleUrl.replace(/.git$/, '') + '/tree/' + item.sha + '" class="jstree-anchor">' + item.sha.substr(0, 7) + '</a>'
folders[path.substring(0, index)].push(item)
if (type === 'tree') {
folders[item.path] = item.children = []
item.a_attr = { href: '#' }
}
item.a_attr = { href: moduleUrl }
}
})
else if (type === 'blob') {
item.a_attr = { href: '/' + repo.username + '/' + repo.reponame + '/' + type + '/' + repo.branch + '/' + path }
}
else if (type === 'commit') {
var moduleUrl = submodules[item.path]
done(null, sort(root))
// special handling for submodules hosted in GitHub
if (~moduleUrl.indexOf('github.com')) {
item.text = '<a href="' + moduleUrl + '" class="jstree-anchor">' + name + '</a>' +
'<span>@ </span>' +
'<a href="' + moduleUrl.replace(/.git$/, '') + '/tree/' + item.sha + '" class="jstree-anchor">' + item.sha.substr(0, 7) + '</a>'
}
item.a_attr = { href: moduleUrl }
}
}
setTimeout(function() {
nextChunk(iteration + 1)
}, 0)
}
})
function fetchSubmodules(cb) {
@ -244,9 +256,10 @@
})
}
// sorts (try matching GitHub's sort order)
function sort(folder) {
folder.sort(function(a, b) {
if (a.type === b.type) return a.text.localeCompare(b.text)
if (a.type === b.type) return a.text === b.text ? 0 : a.text < b.text ? -1 : 1
return a.type === 'blob' ? 1 : -1
})
folder.forEach(function(item) {