mirror of
https://github.com/overleaf/overleaf.git
synced 2024-12-25 08:31:35 +00:00
123 lines
3.1 KiB
CoffeeScript
123 lines
3.1 KiB
CoffeeScript
define [
|
|
"utils/EventEmitter"
|
|
"libs/sharejs"
|
|
], (EventEmitter, ShareJs) ->
|
|
class ShareJsDoc extends EventEmitter
|
|
constructor: (@doc_id, docLines, version, @socket) ->
|
|
# Dencode any binary bits of data
|
|
# See http://ecmanaut.blogspot.co.uk/2006/07/encoding-decoding-utf8-in-javascript.html
|
|
@type = "text"
|
|
docLines = for line in docLines
|
|
if line.text?
|
|
@type = "json"
|
|
line.text = decodeURIComponent(escape(line.text))
|
|
else
|
|
@type = "text"
|
|
line = decodeURIComponent(escape(line))
|
|
line
|
|
|
|
if @type == "text"
|
|
snapshot = docLines.join("\n")
|
|
else if @type == "json"
|
|
snapshot = { lines: docLines }
|
|
else
|
|
throw new Error("Unknown type: #{@type}")
|
|
|
|
@connection = {
|
|
send: (update) =>
|
|
@_startInflightOpTimeout(update)
|
|
@socket.emit "applyOtUpdate", @doc_id, update
|
|
state: "ok"
|
|
id: @socket.socket.sessionid
|
|
}
|
|
|
|
@_doc = new ShareJs.Doc @connection, @doc_id,
|
|
type: @type
|
|
@_doc.on "change", () =>
|
|
@trigger "change"
|
|
@_doc.on "acknowledge", () =>
|
|
@trigger "acknowledge"
|
|
@_doc.on "remoteop", () =>
|
|
@trigger "remoteop"
|
|
|
|
@_bindToDocChanges(@_doc)
|
|
|
|
@processUpdateFromServer
|
|
open: true
|
|
v: version
|
|
snapshot: snapshot
|
|
|
|
submitOp: (args...) -> @_doc.submitOp(args...)
|
|
|
|
processUpdateFromServer: (message) ->
|
|
try
|
|
@_doc._onMessage message
|
|
catch error
|
|
# Version mismatches are thrown as errors
|
|
@_handleError(error)
|
|
|
|
if message?.meta?.type == "external"
|
|
@trigger "externalUpdate", message
|
|
|
|
catchUp: (updates) ->
|
|
for update, i in updates
|
|
update.v = @_doc.version
|
|
update.doc = @doc_id
|
|
@processUpdateFromServer(update)
|
|
|
|
getSnapshot: () -> @_doc.snapshot
|
|
getVersion: () -> @_doc.version
|
|
getType: () -> @type
|
|
|
|
clearInflightAndPendingOps: () ->
|
|
@_doc.inflightOp = null
|
|
@_doc.inflightCallbacks = []
|
|
@_doc.pendingOp = null
|
|
@_doc.pendingCallbacks = []
|
|
|
|
flushPendingOps: () ->
|
|
# This will flush any ops that are pending.
|
|
# If there is an inflight op it will do nothing.
|
|
@_doc.flush()
|
|
|
|
updateConnectionState: (state) ->
|
|
@connection.state = state
|
|
@connection.id = @socket.socket.sessionid
|
|
@_doc.autoOpen = false
|
|
@_doc._connectionStateChanged(state)
|
|
|
|
hasBufferedOps: () ->
|
|
@_doc.inflightOp? or @_doc.pendingOp?
|
|
|
|
getInflightOp: () -> @_doc.inflightOp
|
|
getPendingOp: () -> @_doc.pendingOp
|
|
|
|
attachToAce: (ace) -> @_doc.attach_ace(ace)
|
|
detachFromAce: () -> @_doc.detach_ace?()
|
|
|
|
INFLIGHT_OP_TIMEOUT: 10000
|
|
_startInflightOpTimeout: (update) ->
|
|
meta =
|
|
v: update.v
|
|
op_sent_at: new Date()
|
|
timer = setTimeout () =>
|
|
@trigger "op:timeout", update
|
|
, @INFLIGHT_OP_TIMEOUT
|
|
@_doc.inflightCallbacks.push () =>
|
|
clearTimeout timer
|
|
|
|
_handleError: (error, meta = {}) ->
|
|
@trigger "error", error, meta
|
|
|
|
_bindToDocChanges: (doc) ->
|
|
submitOp = doc.submitOp
|
|
doc.submitOp = (args...) =>
|
|
@trigger "op:sent", args...
|
|
doc.pendingCallbacks.push () =>
|
|
@trigger "op:acknowledged", args...
|
|
submitOp.apply(doc, args)
|
|
|
|
flush = doc.flush
|
|
doc.flush = (args...) =>
|
|
@trigger "flush", doc.inflightOp, doc.pendingOp, doc.version
|
|
flush.apply(doc, args)
|