Patent Document ID: 8539342
Application ID: 12252626

Base Claim:
1. A method comprising: receiving data that defines a first layout specifying a fixed graphical placement for rendering of graphical content portions contained within the data; identifying graphical placement relationships between the graphical content portions in the first layout, and defining a sort order for the graphical content portions in the first layout based on the graphical placement relationships; generating an ordered tree structure for the graphical content portions based on the sort order, the ordered tree structure comprising a plurality of nodes, each node identifying one of the graphical content portions, the plurality of nodes arranged in the ordered tree structure such that an in-order traversal of each node of the ordered tree structure maintains a presentation order of the graphical content portions in the first layout, the ordered tree structure allowing graphical placement of the graphical content portions in a second layout in accordance with the presentation order based on the in-order traversal of each node of the ordered tree structure, the second layout different than the first layout; and providing the ordered tree structure to allow rendering of the graphical content portions in accordance with the second layout.

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Claim 9:
9. The method of claim 1 wherein receiving the data that defines the first layout comprises: receiving a portable document format (PDF) document that defines a fixed arrangement for individually identifiable graphical content portions within a rendering of the PDF document; and wherein generating the ordered tree structure comprises: identifying a graphical placement relation of the graphical content portions, in the PDF document, in relation to at least one other graphical content portion in the PDF document; and producing the presentation order for the individual graphical content portions of the PDF document, the presentation order having a read order of the individual graphical content portions, and allowing presentation of the graphical content portions in the read order on a display device having a size that would not allow full readability of the graphical content portions in the presentation format defined by the PDF document on the display device.