REUSING STYLE SHEET ASSETS

• US 20120005429A1
• Filed: 06/30/2010
• Published: 01/05/2012
• Est. Priority Date: 06/30/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KALASAPUR, Swaroop S., CHENG, Doreen, ACIICMEZ, Onur, SONG, Henry
• Granted Patent: US 8,375,296 B2
• Time in Patent Office: Days
• US Class Current: 711/118
• CPC Class Codes: G06F 16/957 Browsing optimisation, e.g. caching or content distillation

Abstract

In a first embodiment of the present invention, a method is provided comprising: parsing a document, wherein the document contains at least one reference to a style sheet; for each referenced style sheet: determining if a ruleset corresponding to the referenced style sheet is contained in a first local cache; if the ruleset corresponding to the style sheet is contained in the first local cache; if the referenced style sheet is not contained in the first local cache, parsing the referenced style sheet to derive a ruleset; and applying the ruleset(s) to the document to derive a layout for displaying the document.

Claims

1. A method comprising:

parsing a document, wherein the document contains at least one reference to a style sheet;

for each referenced style sheet;

determining if a ruleset corresponding to the referenced style sheet is contained in a first local cache;

if the ruleset corresponding to the style sheet is contained in the first local cache, retrieving the ruleset corresponding to the style sheet from the first local cache; and

if the referenced style sheet is not contained in the first local cache, parsing the referenced style sheet to derive a ruleset; and

applying the ruleset(s) to the document to derive a layout for displaying the document.

2. The method of claim 1, further comprising storing the parsed ruleset in the first local cache.

3. The method of claim 1, further comprising:

for each referenced style sheet;

determining if the referenced style sheet is contained in the first local cache; and

only performing the determining if a ruleset corresponding to the referenced style sheet if the referenced style sheet is contained in the first local cache.

4. The method of claim 1, further comprising:

for each referenced style sheet;

determining if the referenced style sheet is contained in a second local cache; and

only performing the determining if a ruleset corresponding to the referenced style sheet if the referenced style sheet is contained in the second local cache.

5. The method of claim 1, further comprising storing the parsed ruleset in the first local cache only if the parsed ruleset is larger than a predetermined threshold.

6. The method of claim 5, wherein the predetermined threshold is dynamically altered based on the size of the first local cache.

7. The method of claim 5, wherein the predetermined threshold is dynamically altered based on available room in the first local cache.

8. A method for operating a browser comprising:

receiving a document at a document parser;

parsing the document using the document parser to identify a style sheet referenced in the document;

sending a request to a network module with the identification of the style sheet;

determining, at the network module, whether the style sheet is contained in a local cache;

at the network module, if the style sheet is contained in the local cache;

retrieving the style sheet from the local cache;

sending the style sheet to a style sheet parser;

determining if a ruleset corresponding to the style sheet is contained in the local cache;

if the ruleset corresponding to the style sheet is contained in the local cache;

retrieving the ruleset from the local cache; and

sending the ruleset to the style sheet parser;

at the style sheet parser;

if the ruleset was contained in the local cache, using the ruleset in lieu of parsing the style sheet;

if the ruleset was not contained in the local cache;

parsing the style sheet into a parsed ruleset; and

sending the parsed ruleset to the network module for storage in the local cache.

9. The method of claim 8, wherein the document parser creates a DOM tree and the style sheet parser links elements of the ruleset with elements of the DOM tree.

10. A web browser comprising:

a hypertext markup language (HTML) parser;

a cascading style sheet (CSS) module;

a network module;

a local cache;

wherein the HTML parser is configured to receive a web page, parse the web page to determine at least one style sheet referenced in the web page, and send a request for the style sheet to the network module;

wherein the network module is configured to;

determine whether the style sheet is contained in a local cache;

if the style sheet is contained in the local cache;

retrieve the style sheet from the local cache;

send the style sheet to the CSS module;

determine if a ruleset corresponding to the style sheet is contained in the local cache;

if the ruleset corresponding to the style sheet is contained in the local cache;

retrieve the ruleset from the local cache; and

send the ruleset to the CSS module;

wherein the CSS module is configured to;

if the ruleset was contained in the local cache, use the ruleset in lieu of parsing the style sheet;

if the ruleset was not contained in the local cache;

parse the style sheet into a parsed ruleset; and

send the parsed ruleset to the network module for storage in the local cache.

11. The web browser of claim 10, further comprising:

a memory storing a DOM tree created by the HTML parser; and

a layout and rendering module.

12. An apparatus comprising:

means for parsing a document, wherein the document contains at least one reference to a style sheet;

means for, for each referenced style sheet;

determining if a ruleset corresponding to the referenced style sheet is contained in a first local cache;

if the ruleset corresponding to the style sheet is contained in the first local cache, retrieving the ruleset corresponding to the style sheet from the first local cache; and

if the referenced style sheet is not contained in the first local cache, parsing the referenced style sheet to derive a ruleset; and

means for applying the ruleset(s) to the document to derive a layout for displaying the document.

13. The apparatus of claim 12, further comprising storing the parsed ruleset in the first local cache.

14. The apparatus of claim 12, further comprising:

means for, for each referenced style sheet;

determining if the referenced style sheet is contained in the first local cache; and

only performing the determining if a ruleset corresponding to the referenced style sheet if the referenced style sheet is contained in the first local cache.

15. The apparatus of claim 12, further comprising:

means for, for each referenced style sheet;

determining if the referenced style sheet is contained in a second local cache; and

only performing the determining if a ruleset corresponding to the referenced style sheet if the referenced style sheet is contained in the second local cache.

16. The apparatus of claim 12, further comprising means for storing the parsed ruleset in the first local cache only if the parsed ruleset is larger than a predetermined threshold.

17. The apparatus of claim 16, wherein the predetermined threshold is dynamically altered based on the size of the first local cache.

18. The apparatus of claim 16, wherein the predetermined threshold is dynamically altered based on available room in the first local cache.

19. A program storage cloud platform readable by a machine tangibly embodying a program of instructions executable by the machine to perform a method comprising:

parsing a document, wherein the document contains at least one reference to a style sheet;

for each referenced style sheet;

determining if a ruleset corresponding to the referenced style sheet is contained in a first local cache;

if the ruleset corresponding to the style sheet is contained in the first local cache, retrieving the ruleset corresponding to the style sheet from the first local cache; and

if the referenced style sheet is not contained in the first local cache, parsing the referenced style sheet to derive a ruleset; and

applying the ruleset(s) to the document to derive a layout for displaying the document.