How to undo one function?

[Johnwhite]

Hi experts,

How change make the script go back just one step?

my script like this:

var file = new File("C:/selection2txt.txt");  
for(var i = 0; i < app.selection.length; i++)  {  
    if (app.selection.hasOwnProperty ( "baseline" )) {  
    myContents = app.selection.contents;  
    WriteToFile(file, myContents);  
    }  
    else if (app.selection.constructor.name == "Cell") {  
        change();
        var columnSeparatorString = '\t' ;  
        var rowSeparatorString = '\r' ;  
        var doUndo = false ;  
        var unmergeCell = app.menuActions.itemByName("$ID/Unmerge Cell");  
        if( unmergeCell.enabled ){ unmergeCell.invoke(), doUndo = true };  
        var cellSpan = app.selection[0].columns.length;    
        var text = app.selection[0].cells.everyItem().contents;    
        var result = [] ;  
        while (text.length)  
        {  
            result.push(text.splice(0, cellSpan).join( columnSeparatorString ));  
        };  
        result = result.join( rowSeparatorString );  
        if( doUndo ){ app.documents[0].undo() }; 
        WriteToFile(file, result);
    }  
else exit ();  
}  
function change() {
    app.findGrepPreferences = app.changeGrepPreferences = null;
    app.findGrepPreferences.findWhat = "([^~K（「」）：；『』〔〕《》〈〉]) *[\\n\\r]";
    app.changeGrepPreferences.changeTo = "$1 ";
    app.selection[0].changeGrep();
    app.findGrepPreferences = app.changeGrepPreferences = null;
            
    app.findGrepPreferences = app.changeGrepPreferences = null;
    app.findGrepPreferences.findWhat = "[\\n\\r]";
    app.changeGrepPreferences.changeTo = "";
    app.selection[0].changeGrep();
    app.findGrepPreferences = app.changeGrepPreferences = null;
            
    app.findGrepPreferences = app.changeGrepPreferences = null;
    app.findGrepPreferences.findWhat = " +";
    app.changeGrepPreferences.changeTo = " ";
    app.selection[0].changeGrep();
    app.findGrepPreferences = app.changeGrepPreferences = null;
    }
function WriteToFile(file, text)   
{  
     file.encoding = "UTF-8";
     file.open("w");  
     file.write(text);  
     file.close();
 }
// undo change(); function

How can I undo the function change(); after the selection is written to file?

thanks

regard

John

[Laubender]

Hi John,

you may found the solution here:

Re: How to define undo.isValid?

Another approach would be:

1. Save the document before doing anything.

2. Change and write out all the data to files.

3. Close the document without saving.

4. Open the document again.

Regards,
Uwe

[Johnwhite]

Thank you Uwe.

John