Google Inc.

Luiz Pereira

Edgard Lindner

Kevin Markman

Lily Xia

Olga Sergeyevna Belomestnykh

Venkat Ganesan

A list indicating positions of positioned elements on a page of a document is maintained by a page object associated with the page. First position information indicating a first position of a first positioned element having a position that conflicts with a location of a first element associated with the page is transmitted by the page object to a first element object associated with the first element, the first element object being subordinate to the page object within a hierarchy. The first element object generates first layout data. The list is updated by the page object based on a position of a second positioned element having a position that conflicts with the first element. A second element object associated with a second element associated with the page, and subordinate to the page object within the hierarchy, is invoked by the page object to generate second layout data.

System and method for maintaining position information for positioned elements in a document, invoking objects to lay out the elements, and displaying the document

Data defining a document is received from an online document processing service, and a plurality of elements within the document is identified. The plurality of elements may comprise paragraphs, lines of text, images, tables, headers, footers, footnotes, footnote reference information, etc. For each of the plurality of elements, a respective object comprising a layout function and a render function is generated. An object corresponding to an element is invoked to generate layout data associated with the element, and the element is rendered based on the layout data.

System, method, and architecture for displaying a document

A plurality of objects associated with respective footnote reference information within a document are generated. An overflow object associated with overflow footnote reference information corresponding to a previous footnote marker appearing on a previous page is invoked to lay out the overflow footnote reference information, generating overflow layout data. A current page object associated with current page footnote reference information that corresponds to a current page footnote marker appearing on the page is invoked to lay out the current page footnote reference information, generating current page footnote reference information layout data, if an available footnote height is sufficient to lay out the current page footnote reference information. The page is displayed based on the overflow layout data and the current page footnote reference information layout data.

System and method for displaying a document containing footnotes

The subject matter of this document can be implemented in, among other things, a method that includes displaying a visual representation of an electronic document. The method also includes receiving an input to affect a modification of the electronic document, the modification including two or more document change operations, and causing each of the two or more document change operations to be applied to the electronic document. The method also includes determining a redraw approach for redrawing a portion of the visual representation of the electronic document based on the two or more document change operations, such that the redraw approach includes fewer redraws than document change operations. The method further includes performing a redraw of a portion of the visual representation of the electronic document based on the redraw approach.

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New York, NY, United States of America

Luiz Pereira