Editor previews resolve variables while retaining markers

A page uses variables such as the site's root address. In the editor they showed up raw: the variable's text in place of the value, and broken images because the address was not an address.

In July: text and widgets

The server started handing the editor the global variables already resolved, each in a box that keeps the original text. On save, the box becomes the variable again. The database receives the variable, not the value: changing the site's address later still works.

The preview uses the same path. Local variables, which depend on the page's context, stay as they are.

In September: attributes and layouts

The same problem existed in attributes: a src or href with a variable reached the browser as raw text and triggered a request to an address that did not exist. The fix stores, for each resolved attribute, the original and the value.

• If the attribute was not touched, the variable comes back on save.
• If someone changed the address by hand, the change wins.

The layout editor got the same treatment, and extracting the HTML no longer reloads images and videos at every step.