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Hierarchical display and navigation of document revision histories

  • US 8,874,525 B2
  • Filed: 04/19/2011
  • Issued: 10/28/2014
  • Est. Priority Date: 04/19/2011
  • Status: Active Grant
First Claim
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1. A method for capturing a workflow history of an electronic document, the method comprising:

  • storing an array having a plurality of slots that each corresponds to a different cell in a plurality of cells, wherein each cell in the plurality of cells is associated with a different spatial subdivision of an image represented by the electronic document and includes one or more pixels included in the image;

    receiving an event generated by an application that is configured to modify at least one pixel corresponding to at least one cell in the plurality of cells;

    generating a data object that includes information related to the event;

    capturing a digital image that reflects a state of the document at a point in the workflow history of the document corresponding to when the application generated the event;

    storing the data object and the digital image in a memory; and

    storing a pointer to the data object in each slot in the array that corresponds to a cell of the document that is modified as a result of the event.

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