Lazy-load IndexedDB

Thibaut committed 11 years ago

Commit ccf91711 parent 9b1402c2 files · +73 −53Browse files

Unified · Split

2 files

assets/javascripts/app/app.coffee +3 −7
assets/javascripts/app/db.coffee +70 −46

@@ -61,7 +61,7 @@ · 60 unmodified lines
61	61	bootOne: ->
62	62	@doc = new app.models.Doc @DOC
63	63	@docs.reset [@doc]
64		− @doc.load @bootDB.bind(@), @onBootError.bind(@), readCache: true
	64	+ @doc.load @start.bind(@), @onBootError.bind(@), readCache: true
65	65	new app.views.Notice 'singleDoc', @doc
66	66	delete @DOC
67	67	return
@@ -72,21 +72,17 @@ · 4 unmodified lines
72	72	(if docs.indexOf(doc.slug) >= 0 then @docs else @disabledDocs).add(doc)
73	73	@docs.sort()
74	74	@disabledDocs.sort()
75		− @docs.load @bootDB.bind(@), @onBootError.bind(@), readCache: true, writeCache: true
	75	+ @docs.load @start.bind(@), @onBootError.bind(@), readCache: true, writeCache: true
76	76	delete @DOCS
77	77	return
78	78
79		− bootDB: ->
	79	+ start: ->
80	80	for doc in @docs.all()
81	81	@entries.add doc.toEntry()
82	82	@entries.add type.toEntry() for type in doc.types.all()
83	83	@entries.add doc.entries.all()
84	84
85	85	@db = new app.DB()
86		− @db.init(@start.bind(@))
87		− return
88		−
89		− start: ->
90	86	@trigger 'ready'
91	87	@router.start()
92	88	@hideLoading()

assets/javascripts/app/db.coffee+70−46

@@ -4,14 +4,23 @@ class app.DB · 3 unmodified lines
4	4	constructor: ->
5	5	@useIndexedDB = @useIndexedDB()
6	6
7		− init: (@_callback) ->
8		− if @useIndexedDB
9		− @initIndexedDB()
10		− else
11		− @callback()
12		− return
	7	+ db: (fn) ->
	8	+ return fn @_db unless @useIndexedDB and @_db is undefined
	9	+
	10	+ if @callback isnt undefined
	11	+ _callback = @callback
	12	+ @callback = =>
	13	+ _callback()
	14	+ fn @_db
	15	+ return
	16	+ return
	17	+
	18	+ @callback = =>
	19	+ @_db ?= false
	20	+ delete @callback
	21	+ fn @_db
	22	+ return
13	23
14		− initIndexedDB: ->
15	24	try
16	25	req = indexedDB.open(NAME, @indexedDBVersion())
17	26	req.onerror = @callback
@@ -21,20 +30,12 @@ class app.DB · 3 unmodified lines
21	30	@callback()
22	31	return
23	32
24		− isEnabled: ->
25		− !!@db
26		−
27		− callback: =>
28		− @_callback?()
29		− @_callback = null
30		− return
31		−
32	33	onOpenSuccess: (event) =>
33	34	try
34		− @db = event.target.result
35		− @db.transaction(['docs', app.docs.all()[0].slug], 'readwrite').abort() # https://bugs.webkit.org/show_bug.cgi?id=136937
	35	+ @_db = event.target.result
	36	+ @_db.transaction(['docs', app.docs.all()[0].slug], 'readwrite').abort() # https://bugs.webkit.org/show_bug.cgi?id=136937
36	37	catch
37		− @db = null
	38	+ @_db = false
38	39
39	40	@callback()
40	41	return
@@ -53,43 +54,61 @@ class app.DB · 12 unmodified lines
53	54	return
54	55
55	56	store: (doc, data, onSuccess, onError) ->
56		− txn = @db.transaction ['docs', doc.slug], 'readwrite'
57		− txn.oncomplete = -> if txn.error then onError() else onSuccess()
	57	+ @db (db) ->
	58	+ unless db
	59	+ onError()
	60	+ return
	61	+
	62	+ txn = db.transaction ['docs', doc.slug], 'readwrite'
	63	+ txn.oncomplete = -> if txn.error then onError() else onSuccess()
58	64
59		− store = txn.objectStore(doc.slug)
60		− store.clear()
61		− store.add(content, path) for path, content of data
	65	+ store = txn.objectStore(doc.slug)
	66	+ store.clear()
	67	+ store.add(content, path) for path, content of data
62	68
63		− store = txn.objectStore('docs')
64		− store.put(doc.mtime, doc.slug)
	69	+ store = txn.objectStore('docs')
	70	+ store.put(doc.mtime, doc.slug)
	71	+ return
65	72	return
66	73
67	74	unstore: (doc, onSuccess, onError) ->
68		− txn = @db.transaction ['docs', doc.slug], 'readwrite'
69		− txn.oncomplete = -> if txn.error then onError() else onSuccess()
	75	+ @db (db) ->
	76	+ unless db
	77	+ onError()
	78	+ return
	79	+
	80	+ txn = db.transaction ['docs', doc.slug], 'readwrite'
	81	+ txn.oncomplete = -> if txn.error then onError() else onSuccess()
70	82
71		− store = txn.objectStore(doc.slug)
72		− store.clear()
	83	+ store = txn.objectStore(doc.slug)
	84	+ store.clear()
73	85
74		− store = txn.objectStore('docs')
75		− store.delete(doc.slug)
	86	+ store = txn.objectStore('docs')
	87	+ store.delete(doc.slug)
	88	+ return
76	89	return
77	90
78		− version: (doc, callback) ->
79		− txn = @db.transaction ['docs'], 'readonly'
80		− store = txn.objectStore('docs')
	91	+ version: (doc, fn) ->
	92	+ @db (db) ->
	93	+ unless db
	94	+ fn(false)
	95	+ return
81	96
82		− req = store.get(doc.slug)
83		− req.onsuccess = -> callback(!!req.result)
84		− req.onerror = -> callback(false)
	97	+ txn = db.transaction ['docs'], 'readonly'
	98	+ store = txn.objectStore('docs')
	99	+
	100	+ req = store.get(doc.slug)
	101	+ req.onsuccess = -> fn(!!req.result)
	102	+ req.onerror = -> fn(false)
	103	+ return
85	104	return
86	105
87	106	load: (entry, onSuccess, onError) ->
88		− if @isEnabled()
	107	+ if @useIndexedDB and @_db isnt false
89	108	onError = @loadWithXHR.bind(@, entry, onSuccess, onError)
90		− @loadWithIDB(entry, onSuccess, onError)
	109	+ @loadWithIDB entry, onSuccess, onError
91	110	else
92		− @loadWithXHR(entry, onSuccess, onError)
	111	+ @loadWithXHR entry, onSuccess, onError
93	112
94	113	loadWithXHR: (entry, onSuccess, onError) ->
95	114	ajax
@@ -99,14 +118,19 @@ class app.DB · 3 unmodified lines
99	118	error: onError
100	119
101	120	loadWithIDB: (entry, onSuccess, onError) ->
102		− txn = @db.transaction [entry.doc.slug], 'readonly'
103		− store = txn.objectStore(entry.doc.slug)
	121	+ @db (db) ->
	122	+ unless db
	123	+ onError()
	124	+ return
	125	+
	126	+ txn = db.transaction [entry.doc.slug], 'readonly'
	127	+ store = txn.objectStore(entry.doc.slug)
104	128
105		− req = store.get(entry.path)
106		− req.onsuccess = -> if req.result then onSuccess(req.result) else onError()
107		− req.onerror = onError
	129	+ req = store.get(entry.path)
	130	+ req.onsuccess = -> if req.result then onSuccess(req.result) else onError()
	131	+ req.onerror = onError
108	132
109		− txn
	133	+ txn
110	134
111	135	reset: ->
112	136	try indexedDB?.deleteDatabase(NAME) catch