Theming engine

A system for transforming presentation properties of a page, the system comprising:

• a processor;
• and
• a memory containing computer-executable instructions which when executed by the processor produce a theming engine operable to:
• receive a first input item, the first input comprising one or more values associated with a layout, a color, a font, or an image for defining presentation properties of the page;
• receive a second input item corresponding to the page, the second input defining one or more design variables selected by a user, the one or more design variables specifying a layout, a color scheme, a font scheme, or a background image;
• scan, by the processor, the received first input item for a value associated with the layout, the color, the font, or the image for use in the page;
• if the value associated with the layout, the color, the font, or the image is found, search for an annotation, the annotation indicating a modification to the layout, the color, the font, or the image;
• if the annotation indicating the modification to the layout, the color, the font, or the image is found, modify, by the processor, one or more of the one or more values associated with the layout, the color, the font, or the image in the first input item according to the one or more design variables defined in the second input item;
• if a design variable defined in the second input item does not match legibility factors of values defined for default color schemes or font schemes, modify, by the processor, the one or more design variables selected by the user to preserve legibility properties of the default color schemes or font schemes while preserving the a hue, including changing a lightness of the one or more design variables or changing the lightness to a proportional inverse of the lightness of the default color schemes or font schemes;
• if the design variable defined in the second input item matches legibility factors of values defined for the default color schemes or font schemes, modify, by the processor, the one or more values associated with the layout, the color, the font, or the image according to the design variable defined in the second input item;
• and
• output, by the processor, the modifications into one or more style sheets for defining the presentation properties of the page to a renderer for rendering a web page.

A computer readable memory containing computer-executable instructions which when executed by a computer perform a method for transforming presentation properties of a web page, the method comprising:

• receiving a first input item, the first input item comprising one or more values associated with a layout, a color, a font, or an image for defining presentation properties of the web page;
• receiving a second input item corresponding to the web page, the second input defining one or more design variables selected by a user, the one or more design variables specifying a layout, a color scheme, a font scheme, or a background image;
• scanning, by the computer, the received first input item for a value associated with the layout, the color, the font, or the image for use in the web page;
• if the value associated with the layout, the color, the font, or the image is found, searching for an annotation, the annotation indicating a modification to the layout, the color, the font, or the image;
• if the annotation indicating the modification to the layout, the color, the font, or the image is found, determining, by the computer, if the one or more design variables defined in the second input item match legibility factors of values defined for default color schemes or font schemes;
• if a design variable defined in the second input item does not match legibility factors of values defined for the default color schemes or font schemes, modifying, by the computer, the design variable selected by the user to preserve legibility properties of the default color schemes or font schemes while preserving a hue, including changing a lightness of the one or more design variables or changing the lightness to a proportional inverse of the lightness of the default color schemes or font schemes;
• if the design variable defined in the second input item matches legibility factors of values defined for the default color schemes or font schemes, modifying, by the computer, the value associated with the layout, the color, the font, or the image in one or more received CSS files according to the design variable defined in the second input item;
• and
• outputting, by the computer, the modifications into a transformed set of CSS files to a renderer for rendering the web page.