Function setSelection

src/js/svgcanvas.js:3505–3548

(start, end, skipInput)

  }
  
  function setSelection(start, end, skipInput) {
    if(start === end) {
      setCursor(end);
      return;
    }
  
    if(!skipInput) {
      textinput.setSelectionRange(start, end);
    }
    
    selblock = getElem("text_selectblock");
    if (!selblock) {

      selblock = document.createElementNS(svgns, "path");
      assignAttributes(selblock, {
        'id': "text_selectblock",
        'fill': "blue",
        'opacity': .5,
        'style': "pointer-events:none"
      });
      getElem("selectorParentGroup").appendChild(selblock);
    }

    var startbb = chardata[start];    
    var endbb = chardata[end];
    
    cursor.setAttribute('visibility', 'hidden');
    
    var tl = ptToScreen(startbb.x, textbb.y),
      tr = ptToScreen(startbb.x + (endbb.x - startbb.x), textbb.y),
      bl = ptToScreen(startbb.x, textbb.y + textbb.height),
      br = ptToScreen(startbb.x + (endbb.x - startbb.x), textbb.y + textbb.height);
    
    
    var dstr = "M" + tl.x + "," + tl.y
          + " L" + tr.x + "," + tr.y
          + " " + br.x + "," + br.y
          + " " + bl.x + "," + bl.y + "z";
    
    assignAttributes(selblock, {
      d: dstr,
      'display': 'inline'
    });
  }
  
  function getIndexFromPoint(mouse_x, mouse_y) {
    // Position cursor here