How to link chacter styles with strokes in InDesign with Basil.js

Question

I would like to link character styles with a stroke but I don't know how to begin. I have this that just draws a random line, but I would like the line to link all the character styles :

#includepath "~/Documents/;%USERPROFILE%Documents";
#include "basiljs/bundle/basil.js";

function draw() {

    var selItems = b.selections(); // get all selected items
    
    var textFrame1 = selItems[0]; // the first textframe
    var textFrame2 = selItems[1]; // the second textframe
    
    var words1 = b.words(textFrame1);
    var words2 = b.words(textFrame2);        
    
    b.layer("generatedLines"); // get or create this layer and set it as the active one
    b.strokeWeight(1); // we like hairs
    
    for(var i = 0; i < words1.length; i++){ // for each word

      var w1 = words1[i]; // current word from the first textframe

      // nested for-loop, connect each word with all other words of other textframe
      for(var j = 0; j < words2.length; j++){ 

        var w2 = words2[j]; // the current word from the second textframe
    
        b.line(
            // add half of the width and height to make sure the lines are centered
            b.bounds(w1).left + b.bounds(w1).width / 2, 
            b.bounds(w1).top + b.bounds(w1).height / 2, 
            b.bounds(w2).left + b.bounds(w2).width / 2, 
            b.bounds(w2).top + b.bounds(w2).height / 2
        );
          
      }
        
    }
  
}

b.go();

Answer 1

Here is example how you can draw the lines for the texts on the first page of your document:

// find all the texts with character style 'My Style'
app.findGrepPreferences = NothingEnum.nothing;
app.findGrepPreferences.findWhat = '.+';
app.findGrepPreferences.appliedCharacterStyle = 'My Style';
var texts = app.activeDocument.findGrep();

// get coordinates of start and end points of the texts
var points = [];
while (texts.length) {
    try {
        var point1 = {
            'x': text.insertionPoints.firstItem().horizontalOffset,
            'y': text.insertionPoints.firstItem().baseline
        }
        var point2 = {
            'x': text.insertionPoints.lastItem().endHorizontalOffset,
            'y': text.insertionPoints.lastItem().baseline
        }
        points.push(point1, point2);
    } catch(e) {}
}

// remove first and end points
points.shift();
points.pop();

// draw lines on first page
var page = app.activeDocument.pages[0];
while(points.length) {
    var line = page.graphicLines.add();
    var point1 = points.shift();
    var point2 = points.shift();
    line.paths[0].pathPoints[0].anchor = [point1.x, point1.y];
    line.paths[0].pathPoints[1].anchor = [point2.x, point2.y];
    line.strokeWeight = 1;
}

It doesn't use basiljs library though.

If you need to handle many pages, I think it can be done as well. But it will require more coding.

Update

Here is a version of the script that handles many pages:

app.activeDocument.viewPreferences.rulerOrigin = RulerOrigin.SPREAD_ORIGIN;

app.findGrepPreferences = NothingEnum.nothing;
app.findGrepPreferences.findWhat = '.+';
app.findGrepPreferences.appliedCharacterStyle = 'My Style';
var texts = app.activeDocument.findGrep();

// get coordinates of start and end points of the texts
var points = [];
while (texts.length) {
    var text = texts.shift();
    try {
        var start_point = {
            'page': text.parentTextFrames[0].parentPage.name,
            'spread': text.parentTextFrames[0].parentPage.parent.index,
            'x': text.insertionPoints.firstItem().horizontalOffset + .5,
            'y': text.insertionPoints.firstItem().baseline - 13
        }
        var end_point = {
            'page': text.parentTextFrames[0].parentPage.name,
            'spread': text.parentTextFrames[0].parentPage.parent.index,
            'x': text.insertionPoints.lastItem().endHorizontalOffset - .5,
            'y': text.insertionPoints.lastItem().baseline + 1
        }
        points.push(start_point, end_point);
    } catch(e) {}
}

// remove first and end points
points.shift();
points.pop();

// draw lines on first page
while(points.length) {
    var start_point = points.shift();
    var end_point = points.shift();
    if (start_point.spread == end_point.spread) {
        var page = app.activeDocument.pages[start_point.page-1]
        var line = page.graphicLines.add();
        line.paths[0].pathPoints[0].anchor = [start_point.x, start_point.y];
        line.paths[0].pathPoints[1].anchor = [end_point.x, end_point.y];
        line.strokeWeight = 1;
    }
}