Help with a Latex line ender script

[Israel Hands]

I'd like to make a script that adds Latex end of line characters  \\ to the end of each line in a block of body text that I have highlighted in Leo. I know this probably isn't complicated, but then neither am I. 

Thanks

IH

[Luka]

Dear Israel,

There are plenty of ways to do it in LEO but this is how I do it.

Create a @button node with script, select text in body, and run:

@language python

#get selected text from body
w = c.frame.body.wrapper
s = w.getSelectedText()
start,end=w.getSelectionRange()
b=p.b

#do something
s=s.replace('\n','\\\\\n')

#insert edited text back
p.b=b[:start]+s+b[end:]
c.redraw()

____________________
With Best Regards,
Luka

чт, 3 нояб. 2022 г. в 20:11, Israel Hands <alis...@mcgh.ee>:

I'd like to make a script that adds Latex end of line characters  \\ to the end of each line in a block of body text that I have highlighted in Leo. I know this probably isn't complicated, but then neither am I. 

Thanks

IH

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[Edward K. Ream]

On Fri, Nov 4, 2022 at 3:25 AM Luka <luka.go...@gmail.com> wrote:

There are plenty of ways to do it in LEO but this is how I do it.

Create a @button node with script, select text in body, and run:

@language python

#get selected text from body
w = c.frame.body.wrapper
s = w.getSelectedText()
start,end=w.getSelectionRange()
b=p.b

#do something
s=s.replace('\n','\\\\\n')

#insert edited text back
p.b=b[:start]+s+b[end:]
c.redraw()

Thanks, Luka, for this tip.

Leo itself typically expands the selection to include entire lines. Like this (tested) code:

w = c.frame.body.wrapper
s = w.getAllText()
i, j = w.getSelectionRange()
start, junk = g.getLine(s, i)
junk, end = g.getLine(s, j)

Edward

[Thomas Passin]

Don't forget to set up for undo.

[Israel Hands]

Many thanks for such prompt and helpful advice. A significant part of what makes Leo so great. I'm off to try Luka's and Edward's solutions. Sorry to be so slow tbp1, but how do I set up undo?

Thanks again from momentarily sunny Wales.

IH

[Thomas Passin]

No need to apologize!  Leo can do so many things that it's hard to find information, or even know there is something to look for.  I looked in LeoDocs.leo (you can open it from the Help menu).   Search for _Undoably changing body text_ (I originally just searched for _undo_).  It says

To undo a single change to body text::

    command = 'my-command-name'
    b = c.undoer.beforeChangeNodeContents(p, oldYScroll=ypos)
    # Change p's body text.
    c.undoer.afterChangeNodeContents(p,
        command=command, bunch=b, dirtyVnodeList=[])

Someone else can correct me, but I don't think that the exact value of the string command matters.  Your script will probably have a command name, though, so might as well use it.

[Luka]

Edward, Thomas, thanks for advice! 

Putting it all together, I think it could be a nice beginner's template to do something with the selected text in the body. I also use the power of regex for complex text-editing related tasks.

command = 'add_line_end'

# Undo begin

b = c.undoer.beforeChangeNodeContents(p)

#get selected text from body

w = c.frame.body.wrapper

s = w.getAllText()

i, j = w.getSelectionRange()

# to get entire lines:

start, junk = g.getLine(s, i)

junk, end = g.getLine(s, j)

# or just selected text:

# start, end = i,j

txt=s[start:end]

#do something

txt=txt.replace('\n','\\\\\n')

#insert edited text back

p.b=p.b[:start]+txt+p.b[end:]

c.redraw()

# Undo End

c.undoer.afterChangeNodeContents(p,

    command=command, bunch=b)

пт, 4 нояб. 2022 г. в 15:38, Thomas Passin <tbp1...@gmail.com>:

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[Israel Hands]

Hi Luka.

Thanks for wrapping this up in one solution and the prompt to explore this area further!

ta

IH