METHOD AND DEVICE FOR DYNAMICALLY WRAPPING TEXT WHEN DISPLAYING A SELECTED REGION OF AN ELECTRONIC DOCUMENT

• US 20090319888A1
• Filed: 04/15/2009
• Published: 12/24/2009
• Est. Priority Date: 04/15/2008
• Status: Active Grant

• Current Assignee: Opera Software ASA
• Original Assignee: Opera Software ASA
• Inventors: Oygard, Karl Anders
• Granted Patent: US 9,378,188 B2
• Time in Patent Office: Days
• US Class Current: 715/252
• CPC Class Codes: G06F 16/9577 Optimising the visualization of content, e.g. distillation of HTML documents
• CPC Class Codes: G06F 40/103 Formatting, i.e. changing of presentation of documents automatic justification G06F40/189; automatic line break hyphenation G06F40/191
• CPC Class Codes: G06F 40/189 Automatic justification

Abstract

A method is provided for rewrapping text when changing from a first to a second zoom level when displaying an electronic document. The line length at which to rewrap the text is chosen such that no horizontal scrolling becomes necessary. Since the rewrapping may result in a change to the layout of the document, the method may further include s identifying an element in the electronic document and ensuring that the element is included in the display after a zooming-in or zooming-out operation. Also described is a device configured to perform the method and a computer program including instructions for performing the method when executed by a computing device.

Claims

1. A method of performing dynamic text wrapping when displaying a selected region of an electronic document on a display screen of a device, comprising:

loading into a memory device, a document;

determining by the processor, a layout of said document;

displaying on the display screen, at least a part of said document at a first resolution and in accordance with the determined layout, wherein text in the document is wrapped in accordance with the determined layout;

receiving user input representing a command to display said document at a second resolution;

rewrapping by the processor, at least some text in said document based on a maximum line length associated with said second resolution;

determining by the processor, a layout of said document after the at least some of the text is rewrapped; and

displaying on the display screen, at least a part of said document including the rewrapped text at said second resolution.

2. The method according to claim 1, wherein said maximum line length is defined by the width of the display screen of said device.

3. The method according to claim 1, wherein said maximum line length is defined in a configuration file.

4. The method according to claim 1, wherein said maximum line length is defined by the width of a window within which said document is displayed.

5. The method according to claim 1, wherein said second resolution is defined as a ratio of hardware display pixels to original document pixels along one dimension, and said maximum line length in terms of original document resolution is determined as the width of a display window in hardware pixels divided by said ratio.

6. The method according to claim 1, wherein said user input representing a command to display said document at a second resolution includes information that can be used to identify an element in said document, and the step of displaying said document at said second resolutions includes the step of positioning said identified element at a predefined position in said display screen.

7. A computing device configured to display electronic documents for selecting and displaying a region of interest in an electronic document, comprising:

a display screen;

a user input interface;

a communication interface configured to receive electronic documents;

memory into which a received document can be loaded;

a processing unit configured to;

load a document;

determine a layout of said document, wherein text in the document is wrapped in accordance with the determined layout;

display at least a part of said document on the display screen at a first resolution and in accordance with the determined layout;

receive user input representing a command to display said document at a second resolution;

rewrap at least some of the text in said document based on a maximum line length associated with said second resolution;

determine a layout of said document after the at least some of the text has been rewrapped; and

display on the display screen at least a part of said document including the rewrapped text at said second resolution.

8. The computing device according to claim 7, wherein said maximum line length is defined by the width of the display screen of said device.

9. The computing device according to claim 7, wherein said maximum line length is defined in a configuration file.

10. The computing device according to claim 7, wherein said maximum line length is defined by the width of a window within which said document is displayed.

11. The computing device according to claim 7, wherein said second resolution is defined as a ratio of hardware display pixels to original document pixels along one dimension, and said maximum line length in terms of original document resolution is determined as the width of a display window in hardware pixels divided by said ratio.

12. The computing device according to claim 7, wherein said user input representing a command to display said document at a second resolution includes information that can be used to identify an element in said document, and that the step of displaying said document at said second resolutions includes the step of positioning said identified element at a predefined position in said display screen.

13. A computer readable storage medium on which is embodied a computer program comprising instructions that, when executed on a computer, performs the following steps:

loading a document into a memory device;

determining a layout of said document;

displaying at least a part of said document at a first resolution and in accordance with the determined layout on a display device;

receiving user input representing a command to display said document at a second resolution;

rewrapping at least some text in said document based on a maximum line length associated with said second resolution;

determining a layout of said document after the at least some of the text has been rewrapped; and

displaying on the display device at least a part of said document including the rewrapped text at said second resolution.

14. The computer readable storage medium according to claim 13, wherein said maximum line length is defined by the width of the display device.

15. The computer readable storage medium according to claim 13, wherein said maximum line length is defined in a configuration file.

16. The computer readable storage medium according to claim 13, wherein said maximum line length is defined by the width of a window within which said document is displayed.

17. The computer readable storage medium according to claim 13, wherein said second resolution is defined as a ratio of hardware display pixels to original document pixels along one dimension, and said maximum line length in terms of original document resolution is determined as the width of a display window in hardware pixels divided by said ratio.

18. The computer readable storage medium according to claim 13, wherein said user input representing a command to display said document at a second resolution includes information that can be used to identify an element in said document, and that the step of displaying said document at said second resolutions includes the step of positioning said identified element at a predefined position in said display device.