PERSISTENT VIEWPORTS

摘要

A persistent viewports architecture that provides a persistent and correctly-positioned viewport to a user when a collaboration document is being updated. The architecture identifies and utilizes a user's element-of-interest in content of the document to determine and recalculate the correct position of the user viewport. The architecture tracks a topmost element of the content (or section of content) from the viewport and employs the topmost element as a reference element. The topmost element can be one or more of a paragraph, a header, string of text, and an image. When the underlying document is to be updated, the viewport performs a lookup of reference element, and after finding the reference element, adjusts the X and Y offsets of the viewport so that the element-of-interest is inside the viewport.

主权项

1. A system, comprising:
an element component configured to identify an element-of-interest in content of a virtual document, the element-of-interest in a viewport of the virtual document presented to a passive user of a collaboration session; an update component configured to receive an update of the virtual document from an active user of the collaboration session; a viewport component configured to move the viewport to maintain the element-of-interest in the viewport of the passive user regardless of any positional change of the content due to the update by the active user; and at least one hardware processor configured to execute computer-executable instructions in a memory, the instructions executed to enable the element component, the update component, and viewport component.