Determining a high contrast display setting on a client device to process a web document

• US 9,104,363 B2
• Filed: 04/04/2012
• Issued: 08/11/2015
• Est. Priority Date: 10/31/2007
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Gibson, Becky J., Hays, Douglas E.
• Primary Examiner(s): Patel, Manglesh M
• Application Number:
  US13/439,504
• Publication Number:
  US 20120192081A1
• Time in Patent Office: 1,224 Days
• Field of Search: 715/200, 715/236, 715/205, 715/273, 715/234, 715/235, 715/275
• US Class Current: 1/1
• CPC Class Codes: G06F 3/14 Digital output to display device ; Cooperation and interconnection of the display device with other functional units
• CPC Class Codes: G09G 2320/066 for control of contrast
• CPC Class Codes: G09G 2340/06 Colour space transformation

Abstract

Described herein are processes and devices that determine a high contrast setting on a client. Some embodiments include creating an object in a web document, assigning a pre-determined color value to the object, associating the object to the web document, and generating a computed color display value for the object in response to the object being associated with the web document. Some embodiments are further directed to comparing the pre-determined color value to the computed color display value and generating a result based on the comparing of the pre-determined color value to the computed color display value, which result indicates whether the system is set to the high contrast setting. Some embodiments are further directed to storing the result in a variable; and sending the variable to a server to process additional web documents, using the variable, before the additional web documents are loaded onto the client device.

Claims

1. A method for determining whether a high contrast setting is enabled on a computer, said method comprising:

creating an object while processing a web document loaded into a web browser;

assigning a pre-determined color value to a displayable property of the object;

associating the object to the web document;

generating a computed color display value for the object in response to the object being associated with the web document;

comparing the pre-determined color value to the computed color display value;

generating a result based on the comparing of the pre-determined color value to the computed color display value, wherein the result indicates whether the computer is set to the high contrast setting;

storing the result in a variable; and

sending the variable to a server to process additional web documents, using the variable, before the additional web documents are loaded onto a client device.

2. The method of claim 1, further comprising processing one or more of the web document and other web documents based on the result, wherein processing the one or more of the web document and the other web documents based on the result comprises selecting a first set of instructions to display the one or more of the web document and the other web documents when the client device is in a high contrast mode and selecting a second set of instructions to display the one or more of the web document and the other web documents when the client device is not in the high contrast mode.

3. The method of claim 1 further comprising one or more of indicating that the client device is in a high contrast mode if the pre-determined color value and the computed color display value are different according to said comparing, and indicating that the client device is not in the high contrast mode if the pre-determined color value and the computed color display value are not different according to said comparing.

4. The method of claim 1, wherein the pre-determined color value is a low contrast color.

5. The method of claim 1, wherein said creating the object, said assigning the pre-determined color value, said associating the object with the web document, and said comparing the pre-determined color value to the computed color display value, comprises using one or more instructions in the web document.

6. The method of claim 1, wherein comparing the pre-determined color value to the computed color display value comprises normalizing the computed color display value to have an identical format as the pre-determined color value.

7. A computer program product for determining whether a high contrast setting is enabled on a computer, the computer program product comprising:

a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising;

computer readable program code configured to

create a web document object while processing a web document loaded into a web browser,

assign a pre-determined color value to a displayable property of the web document object, wherein the displayable property comprises a color,

associate the web document object to the web document,

generate a computed color display value for the web document object in response to the web document object being associated with the web document,

compare the pre-determined color value to the computed color display value,

generate a result based on comparison of the pre-determined color value to the computed color display value, wherein the result indicates whether the computer is set to the high contrast setting,

process one or more of the web document and other web documents based on the result,

store the result in a variable, and

send the variable to a server to process one or more additional web documents, using the variable, before the one or more additional web documents are loaded onto the computer.

8. The computer program product of claim 7, wherein the computer readable program code is configured to process the one or more of the web document and other web documents based on the result being configured to select a first set of instructions to display the one or more of the web document and the other web documents when the computer is in a high contrast mode and select a second set of instructions to display the one or more of the web document and the other web documents when the computer is not in the high contrast mode.

9. The computer program product of claim 7, wherein the computer readable program code is further configured to

receive the additional web documents from the server;

and

present the additional web documents via the computer.

10. The computer program product of claim 7, wherein the computer readable program code is further configured to

indicate that the computer is in a high contrast mode if the pre-determined color value and the computed color display value are different according to comparison of the pre-determined color value to the computed color display value, and

indicate that the computer is not in the high contrast mode if the pre-determined color value and the computed color display value are not different according to said comparison.

11. The computer program product of claim 7, wherein the pre-determined color value is a low contrast color.

12. The computer program product of claim 7, wherein the computer readable program code is configured to create the web document object, assign the pre-determined color value, associate the web document object with the web document, and compare the pre-determined color value to the computed color display value via use of one or more instructions in the web document.

13. The computer program product of claim 7, wherein the computer readable program code is further configured to normalize the computed color display value to have an identical format as the pre-determined color value.

14. A system comprising:

one or more processors; and

a high contrast mode detection module configured to, via at least one of the one or more processors,

create a web document object,

assign a first color value to a displayable property of the web document object, the first color value being pre-determined to be different than a second color value that a client device would use to display the web document object on the client device when the client device is in a high contrast mode, said second color value being a default high contrast color value stored on the client device, wherein the first color value comprises a color that does not have a highly contrasting color opposite and wherein the second color value comprises a color with a highly contrasting color opposite,

associate the web document object with a web document, wherein association of the web document object with the web document causes the client device to generate a computed color value to use for display of the web document object in the web document, wherein the client device generates the computed color value as the first color value when the client device is not in the high contrast mode and wherein the client device generates the computed color value as the second color value when the client device is in the high contrast mode,

compare the first color value to the computed color value of the web document object to determine whether the client device is in the high contrast mode, wherein comparison of the first color value of the computed color value of the web document object generates a result that corresponds to a high contrast setting value that indicates whether the high contrast mode is enabled or disabled,

produce the result based, at least in part, on said comparison, and

send the result to a server to process additional web documents, using the result, before the additional web documents are loaded onto the client device.

15. The system of claim 14, wherein the high contrast mode detection module is further configured to process a displayable portion of the web document based on the result of the comparison.

16. The system of claim 15, wherein the high contrast mode detection module is configured to process the displayable portion of the web document being configured to select a set of instructions embedded in the web document to apply to elements in the web document that do not display images or colors from a first cascading style sheet when the client device is in the high contrast mode, wherein the set of instructions comprise any one or more of a second cascading style sheet and a set of image files.

17. The system of claim 14, wherein the high contrast mode detection module is further configured to

store the result in a variable, and

send the variable to the server to process the additional web documents using the variable.

18. The system of claim 14, wherein the high contrast mode detection module is further configured to create the web document object, assign the first color value to the displayable property of the web document object, and associate the web document object with the web document, when the web document is loaded within an application on the client device, wherein the application processes the web document to generate the computed color value.