[wp-trac] [WordPress Trac] #43760: Create a revision when autosaving if the content has changed significantly

[WordPress Trac]

#43760: Create a revision when autosaving if the content has changed significantly
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 Reporter:  azaozz                               |       Owner:  (none)
     Type:  enhancement                          |      Status:  new
 Priority:  normal                               |   Milestone:  5.3
Component:  Autosave                             |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch needs-testing has-unit-    |     Focuses:
  tests 2nd-opinion                              |
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Changes (by azaozz):

 * keywords:  has-patch needs-testing has-unit-tests => has-patch needs-
     testing has-unit-tests 2nd-opinion
 * milestone:  Future Release => 5.3


Comment:

 @soulseekah thanks for the alternate patch. Yeah, using text diff will be
 more precise but slower, and since this will always run in the background,
 making it a bit slower wouldn't matter.

 However counting lines may be somehow problematic. It is possible to have
 all of post_content on one line which would mean lots of revisions with
 minimal changes. Thinking we should be counting something else, perhaps
 number of changed places + size of changes, or just added + deleted
 characters.

 Also thinking it would be good to keep the "sliding scale" based on string
 length of post_content. So for longer posts the percentage of changes
 would be less. That will catch vases like having a post with 10 paragraphs
 and adding another one, vs. having a post with 3 paragraphs and editing
 few words in one of them.

 Also perhaps the `wp_create_revision_for_autosave_threshold` that filters
 the percentage of changes needed to trigger a revision may be a bit of
 overkill? Plugins that would want to look there will be able to do
 everything they need by using the `wp_create_revision_for_autosave`
 filter.

 Lets try to add that in 5.3 :)

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Ticket URL: <https://core.trac.wordpress.org/ticket/43760#comment:3>
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