Trimming text to a given pixel width in SVG

Question

I\'m drawing text labels in SVG. I have a fixed width available (say 200px). When the text is too long, how can I trim it ?

The ideal solution would also add ellipsis (.

Answer 1

Implementing Erik's 3rd suggestion I came up with something like this:

//places textString in textObj, adds an ellipsis if text can't fit in width
function placeTextWithEllipsis(textObj,textString,width){
    textObj.textContent=textString;

    //ellipsis is needed
    if (textObj.getSubStringLength(0,textString.length)>=width){
        for (var x=textString.length-3;x>0;x-=3){
            if (textObj.getSubStringLength(0,x)<=width){
                textObj.textContent=textString.substring(0,x)+"...";
                return;
            }
        }
        textObj.textContent="..."; //can't place at all
    }
}

Seems to do the trick :)

Answer 2

@user2846569 show me how to do it ( yes, using d3.js ). But, I have to make some little changes to work:

         function wrap( d ) {
                var self = d3.select(this),
                    textLength = self.node().getComputedTextLength(),
                    text = self.text();
                while ( ( textLength > self.attr('width') )&& text.length > 0) {
                    text = text.slice(0, -1);
                    self.text(text + '...');
                    textLength = self.node().getComputedTextLength();
                }
            }
            svg.append('text')
                .append('tspan')
                .text(function(d) { return d; }) 
                .attr('width', 200 )
                .each( wrap );