Method and system for stashing of document alteration information for quicker web preview

A computer program product comprising a non-transitory computer readable medium having a set of computer executable instructions stored therein, the set of computer executable instructions comprising instructions for:

• receiving a first set of page images at a client computer for display within a viewer application, the first set of page images transformed from a multipage first document stored in a first file format in a repository of a document management system into the first set of page images formatted according to an image format that is browser compatible, each page image in the first set of page images representing a different corresponding page from the first set of pages;
• sending, from the viewer application to the document management system, a modification command to modify the first document, the modification command instructing the document management system to apply the modification to the first document to create a new document version reflecting the modification;
• receiving, at the viewer application, a preview of the new document version, wherein the preview of the new document version is generated by:
• creating a data structure modelling a document structure for the new document version, the data structure including a page mapping to information of the first document, wherein the page mapping maps a first page location in the first document to a second page location in the new document version that reflects the modification;
• wherein the preview of the new document version uses the same page images that are stored in the repository and were received by the client computer;
• and
• generating the preview of the new document version to simulate what the new document version would look like with the modification applied to the first document, the preview of the new document version including images from the first set of page images.