Known Participant

Question

Counting the number of lines in a text field using JavaScript

Forum|Forum|4 years ago
February 11, 2022
2 replies
4170 views

Hi

Using JavaScript how can I count the number of lines in a text field including lines created as a result of wrapped text.

This topic has been closed for replies.

try67

Community Expert

There's no built-in way to do it. You will need to write a custom function to calculate the length of the text based on the font, font size and the characters used in it.

S

SamKhaMAuthor

Known Participant

Could you please provide me with a sample code that calculates the length of the text based on the font, font size and the characters used in it. I am using Font "Calibri" size 11

S

SamKhaMAuthor

Known Participant

Actually, you might be able to do it by using the getPageNthWordQuads method, which returns the location of a piece of static text on the page. You will need to write out each letter on its own, use this method to read its location and then parse the results to calculate the width and height of that letter.

If you're interested, I could develop this script for you, for a fee. You can contact me privately via PM (click my username and then on "Send a message") to discuss it further.

Thank you so much @try67

JoãoCésar17023019

Community Expert

Hi.

Have you tried the getMetrics method?

For example:

console.log(this.yourTextField.getMetrics().lines.length);

Please let us know.

Regards,

JC

S

SamKhaMAuthor

Known Participant

I did not try this function before. Please could your proivide with a sample script using this fuction to call from a Button. I tried the following code and it did not work.

var txtField=this.getField("Labels");

app.alert(txtField.getMetrics().lines.length);

I received the following error:

TypeError: txtField.getMetrices is not function

JoãoCésar17023019

Community Expert

Of course.

Here it is:

var _this = this;

_this.yourButton.on("click", function()
{
	console.log(_this.yourTextField.getMetrics().lines.length);
});

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