When creating a new file and pasting, the edit window width changes

[internationils]

(yay, bug #1111 ; )

When creating a new file and pasting, the edit window width changes to half size (with the right side of the main window just blank)

To reproduce:

• preview window is closed
• copy something from a .md file in the editor
• create a new file
• paste the text
• edit window resized to half-width (no preview shown on the right)
• close the tab and reopen it, everything is normal again

[RickStrahl]

I can't reproduce that.

What I see:

• Markdown doc open - preview pane closed

• ctrl-n to open new editor

• Editor opens with preview pane

• Paste text

• Text displays

• Both editor and preview pane stay exactly the same

[RickStrahl]

Ok - so I figured out the issue here which is a little more complicated and involves actually two bugs:

• The previous preview state is ignored and MM tries to refresh the preview when a new document is created
  This results in a new preview window being created which is what I saw. However, the new preview is not correctly attached to the editor, so any changes in the edit window actually fail.

• When pasting the Preview Mode is explicitly enabled
  This results in a different problem - when the preview is not already visible, it sets the preview visible flag, but it's too late in the cycle to actually render. I think this is what you see: An empty preview pane.

Two fixes were made:

• Only refresh the preview browser (and other related preview stuff) when the preview is actually visible when creating a new document

• Only disable the preview if pasting a non-markdown document. For Markdown docs, respect the active preview visibility.

The final behavior is this:

• When you add a Markdown document the preview visibility is respected (syntax by default is markdown)
• Pasting into an empty doc only changes the preview status to invisible if non-markdown content is posted and the syntax changes to non-markdown

I think this fixes a long standing issue I've been trying to pinpoint but never figured out why it occurred, so thank you for that. I think this also caused some inconsistencies in the preview browser which show up in my logs.

[RickStrahl]

Fix in 3.2.17