US 2017/0364482 A9 · GENERATING A VISUAL LAYOUT TREE BASED ON A NAMED POINT WITHIN A VISUAL DESCRIPTION NODE

Abstract

A layout engine generates a visual layout tree for a visual description tree of a document whose content is to be rendered in one or more display areas. A visual description tree describes the content of a document along with formatting and logical arrangement the content. Visual description nodes of a visual description tree represent the organization of the constituent elements a document hierarchically. A visual layout tree defines the layout of a document within one or more display areas. Visual layout nodes of a visual layout tree represent the layout of the content of a document hierarchically. The layout engine receives as input a visual description tree and generates the corresponding visual layout tree. A rendering engine then inputs the visual layout tree and generates a graphics buffer containing the pixels representing the layout of the document as defined by the visual layout tree.

Claims20

Dependent claims

A method performed by a computing device for generating a visual layout tree for use in rendering content of a document, the document being represented by a visual description tree having visual description nodes, the method comprising:

receiving an anchor point within the document, the anchor point identifying an anchor visual description node within the visual description tree and a named point within the anchor visual description node;
receiving a target location within a display area in which content associated with the anchor point is to be positioned;
querying a layout object for the anchor visual description node to provide a location of the named point within a coordinate space of the anchor visual description node;
and
generating a visual layout tree so that the location of the named point within the coordinate space of the anchor visual description node is positioned at the target location within the display area.

2 more elements

A computing system for generating a visual layout tree for use in rendering content of a document, the document being represented by a visual description tree having visual description nodes, the computing system comprising:

a computer-readable storage medium storing computer-executable instructions that:
receive an indication of an anchor visual description node within the visual description tree and a named point of the anchor visual description node;
receive an indication of a target location within a display area;
identify a location of the named point within a coordinate space of the anchor visual description node;
and
generate a visual layout tree so that the location of the named point within the coordinate space of the anchor visual description node is positioned at the target location within the display area;
and
a processor for executing the computer-executable instructions stored in the computer-readable storage medium.

5 more elements

Dependencies are inferred from the claim text.

Generating a visual layout tree based on a named point within a visual description node

Life of this patent

Generating a visual layout tree based on a named point within a visual description node

Life of this patent

Abstract

Claims20