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Leave initial request open until the viewer is ready to switch to range requests.

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This commit is contained in:
Brendan Dahl 2013-11-18 11:17:26 -08:00
parent 945e370d4f
commit 0385131a9a
5 changed files with 57 additions and 24 deletions
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31
src/core/chunked_stream.js
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@ -30,6 +30,7 @@ var ChunkedStream = (function ChunkedStreamClosure() {
this.numChunksLoaded = 0;
this.numChunks = Math.ceil(length / chunkSize);
this.manager = manager;
this.initialDataLength = 0;
}
// required methods for a stream. if a particular stream does not
@ -77,11 +78,26 @@ var ChunkedStream = (function ChunkedStreamClosure() {
}
},
onReceiveInitialData: function (data) {
this.bytes.set(data);
this.initialDataLength = data.length;
var endChunk = this.end === data.length ?
this.numChunks : Math.floor(data.length / this.chunkSize);
for (var i = 0; i < endChunk; i++) {
this.loadedChunks[i] = true;
++this.numChunksLoaded;
}
},
ensureRange: function ChunkedStream_ensureRange(begin, end) {
if (begin >= end) {
return;
}
if (end <= this.initialDataLength) {
return;
}
var chunkSize = this.chunkSize;
var beginChunk = Math.floor(begin / chunkSize);
var endChunk = Math.floor((end - 1) / chunkSize) + 1;
@ -243,10 +259,25 @@ var ChunkedStreamManager = (function ChunkedStreamManagerClosure() {
this.callbacksByRequest = {};
this.loadedStream = new Promise();
if (args.initialData) {
this.setInitialData(args.initialData);
}
}
ChunkedStreamManager.prototype = {
setInitialData: function ChunkedStreamManager_setInitialData(data) {
this.stream.onReceiveInitialData(data);
if (this.stream.allChunksLoaded()) {
this.loadedStream.resolve(this.stream);
} else if (this.msgHandler) {
this.msgHandler.send('DocProgress', {
loaded: data.length,
total: this.length
});
}
},
onLoadedStream: function ChunkedStreamManager_getLoadedStream() {
return this.loadedStream;
},