mirror of
https://github.com/overleaf/overleaf.git
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117 lines
2.8 KiB
CoffeeScript
117 lines
2.8 KiB
CoffeeScript
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define [
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"libs/sharejs"
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"libs/backbone"
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], (ShareJs) ->
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class ShareJsDoc
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constructor: (@doc_id, docLines, version, @socket) ->
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# Dencode any binary bits of data
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# See http://ecmanaut.blogspot.co.uk/2006/07/encoding-decoding-utf8-in-javascript.html
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@type = "text"
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docLines = for line in docLines
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if line.text?
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@type = "json"
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line.text = decodeURIComponent(escape(line.text))
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else
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@type = "text"
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line = decodeURIComponent(escape(line))
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line
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if @type == "text"
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snapshot = docLines.join("\n")
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else if @type == "json"
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snapshot = { lines: docLines }
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else
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throw new Error("Unknown type: #{@type}")
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@connection = {
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send: (update) =>
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@_startInflightOpTimeout(update)
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@socket.emit "applyOtUpdate", @doc_id, update
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state: "ok"
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id: @socket.socket.sessionid
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}
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@_doc = new ShareJs.Doc @connection, @doc_id,
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type: @type
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@_doc.on "change", () =>
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@trigger "change"
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@_doc.on "acknowledge", () =>
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@trigger "acknowledge"
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@_doc.on "remoteop", () =>
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@trigger "remoteop"
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@_bindToDocChanges(@_doc)
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@processUpdateFromServer
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open: true
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v: version
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snapshot: snapshot
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submitOp: (args...) -> @_doc.submitOp(args...)
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processUpdateFromServer: (message) ->
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try
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@_doc._onMessage message
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catch error
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# Version mismatches are thrown as errors
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@_handleError(error)
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if message?.meta?.type == "external"
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@trigger "externalUpdate"
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catchUp: (updates) ->
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for update, i in updates
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update.v = @_doc.version
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update.doc = @doc_id
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@processUpdateFromServer(update)
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getSnapshot: () -> @_doc.snapshot
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getVersion: () -> @_doc.version
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getType: () -> @type
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clearInflightAndPendingOps: () ->
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@_doc.inflightOp = null
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@_doc.inflightCallbacks = []
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@_doc.pendingOp = null
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@_doc.pendingCallbacks = []
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flushPendingOps: () ->
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# This will flush any ops that are pending.
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# If there is an inflight op it will do nothing.
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@_doc.flush()
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updateConnectionState: (state) ->
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@connection.state = state
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@connection.id = @socket.socket.sessionid
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@_doc.autoOpen = false
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@_doc._connectionStateChanged(state)
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hasBufferedOps: () ->
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@_doc.inflightOp? or @_doc.pendingOp?
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attachToAce: (ace) -> @_doc.attach_ace(ace)
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detachFromAce: () -> @_doc.detach_ace?()
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INFLIGHT_OP_TIMEOUT: 10000
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_startInflightOpTimeout: (update) ->
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timer = setTimeout () =>
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@_handleError "Doc op was not acknowledged in time"
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, @INFLIGHT_OP_TIMEOUT
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@_doc.inflightCallbacks.push () =>
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clearTimeout timer
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_handleError: (error) ->
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@trigger "error", error
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_bindToDocChanges: (doc) ->
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submitOp = doc.submitOp
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doc.submitOp = (args...) =>
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@trigger "op:sent"
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doc.pendingCallbacks.push () =>
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@trigger "op:acknowledged"
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submitOp.apply(doc, args)
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_.extend(ShareJsDoc::, Backbone.Events)
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return ShareJsDoc
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