Function drawText

InteractiveHtmlBom/web/render.js:19–122

(ctx, text, color)

}

function drawText(ctx, text, color) {
  if ("ref" in text && !settings.renderReferences) return;
  if ("val" in text && !settings.renderValues) return;
  ctx.save();
  ctx.fillStyle = color;
  ctx.strokeStyle = color;
  ctx.lineCap = "round";
  ctx.lineJoin = "round";
  if ("svgpath" in text) {
    if ("thickness" in text) {
      ctx.lineWidth = text.thickness;
      ctx.stroke(new Path2D(text.svgpath));
    } else if ("fillrule" in text) {
      ctx.fill(new Path2D(text.svgpath), text.fillrule);
    }
    ctx.restore();
    return;
  }
  ctx.lineWidth = text.thickness;
  if ("polygons" in text) {
    ctx.fill(getPolygonsPath(text));
    ctx.restore();
    return;
  }
  ctx.translate(...text.pos);
  ctx.translate(text.thickness * 0.5, 0);
  var angle = -text.angle;
  if (text.attr.includes("mirrored")) {
    ctx.scale(-1, 1);
    angle = -angle;
  }
  var tilt = 0;
  if (text.attr.includes("italic")) {
    tilt = 0.125;
  }
  var interline = text.height * 1.5 + text.thickness;
  var txt = text.text.split("\n");
  // KiCad ignores last empty line.
  if (txt[txt.length - 1] == '') txt.pop();
  ctx.rotate(deg2rad(angle));
  var offsety = (1 - text.justify[1]) / 2 * text.height; // One line offset
  offsety -= (txt.length - 1) * (text.justify[1] + 1) / 2 * interline; // Multiline offset
  for (var i in txt) {
    var lineWidth = text.thickness + interline / 2 * tilt;
    for (var j = 0; j < txt[i].length; j++) {
      if (txt[i][j] == '\t') {
        var fourSpaces = 4 * pcbdata.font_data[' '].w * text.width;
        lineWidth += fourSpaces - lineWidth % fourSpaces;
      } else {
        if (txt[i][j] == '~') {
          j++;
          if (j == txt[i].length)
            break;
        }
        lineWidth += pcbdata.font_data[txt[i][j]].w * text.width;
      }
    }
    var offsetx = -lineWidth * (text.justify[0] + 1) / 2;