Enhance alignments of caption text

Allow caption text to be aligned independently of image

(Why the issue was filed, steps to reproduce the problem, etc.)

Proposed resolution

This patch allows caption text inside a caption to be aligned/justified, without having to justify the image itself. When an image is inserted to wysiwyg editor (via insert.module) with a caption, the caption text is wrapped in P element with class "caption-text".

Next, if you click into this text and click one of the left/center/right justify buttons in wysiwyg toolbar, that button gets hijacked by our module. Instead of applying text-align style to the element, it applies a class ("caption-text-[left,right,center]") to the P element. This element is then aligned via caption-filter.css.

This patch only applies to CKEditor, and extends patch https://drupal.org/node/696734#comment-8424019.

Remaining tasks

Integrate this feature, as well as proposals in 696734 to TinyMCE.

User interface changes

In the wysiwyg interface, you do not need to highlight all the text inside a caption box to align it. Just click on part of the text and click left/right/center justify button.