Sakurai/pdf.js
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bringing Cache() back

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This commit is contained in:
Artur Adib 2011-11-30 15:10:27 -05:00
parent e316d78755
commit a523d80753
1 changed files with 15 additions and 1 deletions
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16
web/viewer.js
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@ -13,6 +13,19 @@ var kMinScale = 0.25;
var kMaxScale = 4.0; var kMaxScale = 4.0;
var Cache = function cacheCache(size) {
var data = [];
this.push = function cachePush(view) {
var i = data.indexOf(view);
if (i >= 0)
data.splice(i);
data.push(view);
if (data.length > size)
data.shift().update();
};
};
var cache = new Cache(kCacheSize);
var currentPageNumber = 1; var currentPageNumber = 1;
var PDFView = { var PDFView = {
@ -639,7 +652,8 @@ function updateViewarea() {
var visiblePages = PDFView.getVisiblePages(); var visiblePages = PDFView.getVisiblePages();
for (var i = 0; i < visiblePages.length; i++) { for (var i = 0; i < visiblePages.length; i++) {
var page = visiblePages[i]; var page = visiblePages[i];
PDFView.pages[page.id - 1].draw(); if (PDFView.pages[page.id - 1].draw())
cache.push(page.view);
} }
if (!visiblePages.length) if (!visiblePages.length)