When using a different theme and removing an editor
plugin such as the equation plugin, atto will display
an error about a missing dependency.
A thank you to Anthony Forth for providing this patch.
Specifically on paste - we don't need all the random style attributes
from content on the clipboard. When you copy from a webpage - the browser
inlines all the styles from the page so that the pasted content will look
like the place it was copied from. But this is never what you want - you
want the content on paste, but with no special styling.
Instead of using the more rollup-tolerant config for all files, make the
configuration stricter by default but lower in grunt for yui modules.
This means that manual runs (prechecker) or editor integrations will
flag up the errors as well as grunt.
Also add ignore lines to the core files so that eslint isn't noisy when
not running with grunt.
Copying from one atto editor to another comes with a lot of style
information. This removes the color attributes which make the page
look ugly when competing with different themes.
In order to have a consistant browser behavior and prevent nesting of
subscripts and superscripts, tags are converted to CSS classes and then
the CSS classes in the selection are toggeled using the rangy crossbrowser
selection library already included in Atto without using an execCommand.
To ensure we only clean style and classes, first we select the inside
of those attributes and "replace" them with handler functions. Those
functions scan the actual attribute values for class or styles that
we want to exclude.
The first level regex has 3 groups. group1 selects everything in the
tag leading up to the attribute values, group2 has the attributes,
group3 has the trailing quote mark. We work on group2 then return
the combination of group1, group2, and group3.
Browsers may not provide html content in the clipboard object event
though it will really be pasted as such. This includes Firefox on
Windows, Internet Explorer, and some niche cases in Safari.
Because of this, we need to scrub the entire editor anytime we can't
intercept a paste event.
In some magical day in the future when there is better cross browser
support, we can undo this.
Jake Hau