US 11,775,733 B2 · Device dependent rendering of PDF content including multiple articles and a table of contents

Abstract

The technology disclosed relates to systems and methods for device-dependent display of an article from a PDF file that has multiple articles and a table of contents to the articles. The system can use a library to render the article from the PDF file. The rendering can include bounding boxes positioned at on-page coordinates that can include one or more images and multiple text blocks of glyphs. The system can detect at least one table in the PDF file that includes pages numbers and multiple columns. The system includes logic to partition a contiguous sequence of text representing the table into text blocks of entries and columns. The system includes logic to merge multiple text blocks that align horizontally with a single page number into a single text block. Table of contents is displayed in a device-dependent format including the entries from the merged text blocks.

Claims21

Dependent claims

A method of device-dependent display from a PDF file that has a table of contents, the method including:

using a library to render at least part of the PDF file, including rendering of a plurality of bounding boxes, positioned at on-page coordinates, that contain one or more images and multiple text blocks of glyphs, with font information for one or more glyphs;
detecting the table of contents, which includes page numbers;
detecting that the table of contents spans multiple pages in the PDF;
and
using the font information to distinguish the table of contents from header and footer information and to merge entries from successive pages of the PDF into the table of contents.

2 more elements

A system, including one or more processors coupled to memory loaded with computer instructions to generate device-dependent display from a PDF file that has a table of contents, which instructions, when executed on the processors, implement:

using a library to render at least part of the PDF file, including rendering of a plurality of bounding boxes, positioned at on-page coordinates, that contain one or more images and multiple text blocks of glyphs, with font information for one or more glyphs;
detecting the table of contents, which includes page numbers;
detecting that the table of contents spans multiple pages in the PDF;
and
using the font information to distinguish the table of contents from header and footer information and to merge entries from successive pages of the PDF into the table of contents.

2 more elements

A non-transitory computer readable storage medium impressed with computer program instructions to generate device-dependent display from a PDF file that has a table of contents, which instructions, when executed on a processor, implement a method including:

using a library to render at least part of the PDF file, including rendering of a plurality of bounding boxes, positioned at on-page coordinates, that contain one or more images and multiple text blocks of glyphs, with font information for one or more glyphs;
detecting the table of contents, which includes page numbers;
detecting that the table of contents spans multiple pages in the PDF;
and
using the font information to distinguish the table of content from header and footer information and to merge entries from successive pages of the PDF into the table of contents.

2 more elements

Dependencies are inferred from the claim text.

Device dependent rendering of PDF content including multiple articles and a table of contents

Life of this patent

Device dependent rendering of PDF content including multiple articles and a table of contents

Life of this patent

Abstract

Claims21