Method: Get the ID of a previous crop from the same base image.

Method: Given an attachment ID for a header image, unsets it as a user-uploaded header image for the active theme.

Method: Updates the last-used postmeta on a header image attachment after saving a new header image via the Customizer.

Method: Gets the details of default header images if defined.

Method: Gets the previously uploaded header images.

Method: Calculate width and height based on what the currently selected theme supports.

Method: Create an attachment ‘object’.

Method: Insert an attachment and its metadata.

Method: Gets attachment uploaded by Media Manager, crops it, then saves it as a new object. Returns JSON-encoded object details.

Method: Given an attachment ID for a header image, updates its “last used” timestamp to now.

Method: Unused since 3.5.0.

Method: Unused since 3.5.0.

Method: Choose a header image, selected from existing uploaded and default headers, or provide an array of uploaded header data (either new, or from media library).

Method: Display first step of custom header image page.

Method: Remove a header image.

Method: Reset a header image to the default image for the theme.

Method: Display second step of custom header image page.

Method: Upload the file to be cropped in the second step.

Method: Display third step of custom header image page.

Method: Display last step of custom header image page.

Method: Display the page based on the current step.

Method: Display JavaScript based on Step 1 and 3.

Method: Constructor – Register administration header callback.

Method: Display JavaScript based on Step 2.

Method: Set up the hooks for the Custom Header admin page.

Method: Adds contextual help.