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Fixes reported offset when length is unknown

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This commit is contained in:
Yury Delendik 2012-08-20 17:53:26 -05:00
parent df4fadeaf5
commit 077b19fca1
1 changed files with 17 additions and 15 deletions

32
extensions/firefox/components/PdfStreamConverter.js

@ -127,27 +127,29 @@ function getLocalizedString(strings, id, property) {
function PdfDataListener(length) {
this.length = length; // less than 0, if length is unknown
this.data = new Uint8Array(length >= 0 ? length : 0x10000);
this.loaded = 0;
}
PdfDataListener.prototype = {
set: function PdfDataListener_set(chunk, offset) {
var loaded = offset + chunk.length;
if (this.length < 0 && this.data.length < loaded) {
if (this.length < 0) {
var willBeLoaded = this.loaded + chunk.length;
// data length is unknown and new chunk will not fit in the existing
// buffer, resizing the buffer by doubling the last its length
var newLength = this.data.length;
for (; newLength < loaded; newLength *= 2) {}
var newData = new Uint8Array(newLength);
newData.set(this.data);
this.data = newData;
// buffer, resizing the buffer by doubling the its last length
if (this.data.length < willBeLoaded) {
var newLength = this.data.length;
for (; newLength < willBeLoaded; newLength *= 2) {}
var newData = new Uint8Array(newLength);
newData.set(this.data);
this.data = newData;
}
this.data.set(chunk, this.loaded);
this.loaded = willBeLoaded;
} else {
this.data.set(chunk, offset);
this.loaded = offset + chunk.length;
this.onprogress(this.loaded, this.length);
}
this.data.set(chunk, offset);
this.loaded = loaded;
// not reporting the progress if data length is unknown
if (this.length >= 0)
this.onprogress(loaded, this.length);
},
getData: function PdfDataListener_getData() {
var data = this.length >= 0 ? this.data :