Paginated viewport navigation over a fixed document layout

A computer-implemented method comprising:

• receiving, at a computing device, a display page having a fixed layout of displayable content therein;
• identifying, by the computing device, a plurality of content regions in the display page and indications of viewability associated with respective ones of the plurality of content regions;
• detecting a request to navigate a viewport from a first content region of the plurality of content regions to a second content region of the plurality of content regions, the first content region being different than the second content region;
• and
• analyzing viewability of the second content region, the analyzing including determining viewability of content from the second content region based at least in part on an indication of viewability associated with the second content region.

A non-transitory computer-readable storage medium having instructions stored thereon, that, when executed by a processor of a computing device, cause the processor to perform operations comprising:

• defining a logical flow of multiple content regions in a display page, the defining comprising associating indications of viewability with respective ones of the multiple content regions;
• initiating display of a first content region of the multiple content regions, the first content region of the display page displayed on a display screen according to a first zoom level;
• and
• in response to receiving navigation input in the display page to view a next content region following the first content region in the logical flow:
• identifying a second content region and an indication of viewability associated therewith, the second content region following the first content region in the logical flow;
• analyzing parameters of the second content region and the indication of viewability to determine a second zoom level for rendering the second content region;
• and
• initiating display of the second content region according to the second zoom level, the second zoom level being different than the first zoom level.