Markdown image alignment concept

gistfile1.txt

# Concept for specifying alignment in markdown/rst/similar thing

Specifying how to align images, text etc in markdown is not great.
Here's a concept on how that could be written

The following image is on the left:

|[1]-|
[1]: image.png

The following image is centered:

|-[1]-|
[1]: image.png

The following image is on the right:

|-[1]|
[1]: image.png

Each dash is an "horizontal filler". They will get the space divided evenly.
The following is still centering horizontally:

|---[1]---|
[1]: image.png

So, using multiple `-` might be useful to improve readability. You could even do
something very "extreme" and use 80 columns, if you want:

|------------------------------------[1]---------------------------------------|
[1]: image.png

Whether it's prefectly centered or not is not clear, though. It's better to make
proportions clear, probably.

The following, for example, will "center" the image leaving twice the space
on the right than it is on the left:

|-[1]--|
[1]: image.png

No fillers means to stretch the image: from side to side.

|[1]|
[1]: image.png

Multiple images can be specified as well! This is conveniently centering two
images with no spaces between them:

|-[1][2]-|
[1]: http://images.com/image.jpg
[2]: table.png

While in the following, the space wrapping the images is the same:

|--[1]--[2]--|
[1]: http://images.com/image.jpg
[2]: table.png

This notation is useful also to specify how the *text wrapping* should behave.
Say, for example, that you want a paragraph with an image on the right, wrapping
text around it (on its left). Easy peasy:

|~~[1]|
[1]: table.png

Using ~ in place of - means that you want to place text in that space. An image
centered with text on both sides would be like this:

|~~[1]~~|
[1]: table.png

Mixing text and spaces is not supported, though. The presence of `~` will bring
the text in, no matter how many `-` you have. For example, these are the same:

|[1]~~~|
|[1]~--|
|[1]--~|