Is there a way to detect whether the currently selected text box contains a frame separator?

[dublove]

I want to check whether the currently selected frame contains a frame separator (~R) or a page separator (~P).
But it seems like I'm not getting any results.

var s = app.selection[0].texts[0].contents;
alert(s);

var what = "~R|~P"
var res = getGrepSearch(what, app.activeDocument);
alert(res);

function getGrepSearch(fp, s) {
    app.findGrepPreferences = app.changeGrepPreferences = app.findChangeGrepOptions = null;
    app.findChangeGrepOptions.properties = { includeHiddenLayers: true, includeLockedLayersForFind: true, includeLockedStoriesForFind: true, includeMasterPages: true }
    app.findGrepPreferences.findWhat = fp;
    //return app.findGrep()
    return s.findGrep()
}

[rob day · Accepted solution]

Set s to the text not the contents, try this:

//var s = app.selection[0].texts[0].contents;
//get the text frame not the contents
var s = app.selection[0].texts[0];

//returns an empty array
//var what = "~R|~P"
var what = "~R"

var res = getGrepSearch(what, s);
//the first found item
alert(res[0].contents)

function getGrepSearch(fp, s) {
    app.findGrepPreferences = app.changeGrepPreferences = app.findChangeGrepOptions = null;
    app.findChangeGrepOptions.properties = { includeHiddenLayers: true, includeLockedLayersForFind: true, includeLockedStoriesForFind: true, includeMasterPages: true }
    app.findGrepPreferences.findWhat = fp;
    return s.findGrep()
}

[dublove]

Hi rob day.

Thank you very much.
So I needed to search the text.

Also, I had the wrong search scope.

[dublove]

Hi @rob day 

Can't find it　 Will it throw an error?
How to avoid it?

[dublove]

If it can be found, no problem.
When there is no ~R to find, there is an error.

There's also alert(resP[0].contents); which pops up the image below.
But alert(resP[0].contents == "FRAME_BREAK"); pops up false.

Originally it was going to be
resP[0].contents==SpecialCharacters.FRAME_BREAK

[rob day]

You have to check if the array is empty:

var res = getGrepSearch(what, s);
if (res.length) {
	alert(res[0].contents)
} else {alert("Nothing Found")}

[dublove]

Okay, I'll take your word for it. I'm voiding these.

//try {
// if (resR[0].contents == SpecialCharacters.FRAME_BREAK) {
// var fb = 1
// }
//}
//catch (e) { }
//try {
// if (resP[0].contents == SpecialCharacters.PAGE_BREAK) {
// var pb = 1
// }
//}
//catch (e) { } //}

[dublove]

@rob day 

I suddenly realized that  res.length  isn't always reliable either.
When the selected text box is a table, it will also throw an error.

At this point, var s = app.selection[0].texts[0]; is invalid.

Is there a way to make the function `getGrepSearch(fp, s)` support null?

[dublove]

For the error that is reported when it is not found.
I just catch it off, probably not a good idea.