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Cleaning up fonts when viewer is idle for some time

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This commit is contained in:
Yury Delendik 2013-11-14 13:43:38 -08:00
parent 945e370d4f
commit e712c4136a
9 changed files with 93 additions and 9 deletions
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24
src/core/obj.js
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@ -189,7 +189,7 @@ var RefSet = (function RefSetClosure() {
var RefSetCache = (function RefSetCacheClosure() {
function RefSetCache() {
this.dict = {};
this.dict = Object.create(null);
}
RefSetCache.prototype = {
@ -203,6 +203,16 @@ var RefSetCache = (function RefSetCacheClosure() {
put: function RefSetCache_put(ref, obj) {
this.dict['R' + ref.num + '.' + ref.gen] = obj;
},
forEach: function RefSetCache_forEach(fn, thisArg) {
for (var i in this.dict) {
fn.call(thisArg, this.dict[i]);
}
},
clear: function RefSetCache_clear() {
this.dict = Object.create(null);
}
};
@ -214,6 +224,7 @@ var Catalog = (function CatalogClosure() {
this.pdfManager = pdfManager;
this.xref = xref;
this.catDict = xref.getCatalogObj();
this.fontCache = new RefSetCache();
assertWellFormed(isDict(this.catDict),
'catalog object is not a dictionary');
@ -400,13 +411,22 @@ var Catalog = (function CatalogClosure() {
return shadow(this, 'javaScript', javaScript);
},
cleanup: function Catalog_cleanup() {
this.fontCache.forEach(function (font) {
delete font.sent;
delete font.translated;
});
this.fontCache.clear();
},
getPage: function Catalog_getPage(pageIndex) {
if (!(pageIndex in this.pagePromises)) {
this.pagePromises[pageIndex] = this.getPageDict(pageIndex).then(
function (a) {
var dict = a[0];
var ref = a[1];
return new Page(this.pdfManager, this.xref, pageIndex, dict, ref);
return new Page(this.pdfManager, this.xref, pageIndex, dict, ref,
this.fontCache);
}.bind(this)
);
}