Galleria - The galleria directive

A "galleria" consists of list of image file names, one per line, followed by a list of options, one per line, and then an optional caption paragraph. There must be blank lines before the caption and target paragraph. Here is an example, corresponding to the illustration of the introduction section:

.. galleria::
  tiryns.jpg
      :caption:  Mycenaean Watercolor, from a fresco in `Tiryns`_
      :target:   https://en.wikipedia.org/wiki/Tiryns
  boxers.jpg
      :caption:  Watercolor, also a fresco from `Akrotiri`_
      :target:   `Akrotiri`_
  swallows.jpg
      :caption:  Watercolor, from a fresco from `Akrotiri`_
  caryatid.jpg
      :caption:  Watercolor, the `Caryatid`_ porch at the `Acropolis`_
      :target:
  :max-height: 350px

Options

The galleria block could contain options.

class name

The name argument is a class name defined in the GALLERIA_PROCESS dictionary variable of the pelicanconf.py file.
flex-wrap value

This option manages the flex-wrap property of the html flexible container used by the galleria directive. The value is one of nowrap, wrap, wrap-reverse. With nowrap, all the image are displayed on one line. The wrap value specifies that the flexible items will wrap if necessary: this is the default value for the galleria directive. With wrap-reverse, the flexible items will wrap, if necessary, but lines of the container appear in reverse order.
max-height length

The maximal height of the image. Used to scale the image vertically. When unspecified, the default value is given by the GALLERIA_DEFAULT_MAX_HEIGHT variable of the pelicanconf.py file.
column-gap length

It defines the value of the column-gap property of the html flexible container used by the galleria directive.

Caption and target paragraph

There must be blank lines before the caption and target paragraph. Each line start either by !caption! or !target!, followed by the file name and a one-line argument. For a target, the argument is considered as a clickable link associated to the image. When there is no target for an image, by default the image is clickable and the link is the full resolution image. Both links and caption could involve links such as `pelican`_, that are solved by the parser as pelican.

In the previous example, for the first image, the target is explicit, for the second one, it involves a solved link for the third one, there is no declared target, and for the last, there is explicitly an empty target. When there is no declared target, the image is automatically clickable and points to the full resolution version of the image: observe that the cursor changed to zoom-in. Conversely, when there is explicitly an empty target, the image is not clickable: observe that the cursor do not change.