// public static void DrawLine(Document doc, string jsContextVar, Axis axis, int value)
// {
// string valueStr = value.ToString();
// bool a = axis == Axis.X;
//
// string moveToX = a ? valueStr : "0";
// string lineToX = a ? valueStr : "99999";
// string moveToY = a ? "0" : valueStr;
// string lineToY = a ? "99999" : valueStr;
//
// JSHelper.Eval(doc, $@"let ctx = {jsContextVar};
// ctx.beginPath();
// ctx.moveTo({moveToX},{moveToY});
// ctx.lineTo({lineToX},{lineToY});
// ctx.stroke();");
// }
// language=JS
public static void GetNodeBoundingClientRect(Document doc, string jsNodeVar, out double pageX, out double pageY, out double width, out double height, out double screenX, out double screenY, out double bottom, out double right)
{
// language=JS
string result = JSHelper.Eval(doc,
$@"let node = {jsNodeVar}, range, value;" +
"if (node instanceof Text) {" +
"range = document.createRange();" +
"range.selectNode(node);" +
"value = range.getClientRects()[0];}" +
"else value = node.getBoundingClientRect();" +
"return JSON.stringify({bottom: value.bottom, height: value.height, left: value.left, right: value.right, " +
"top: value.top, width: value.width, pageY: value.top + pageYOffset, pageX: value.left + pageXOffset}," +
"['bottom', 'height', 'left', 'right', 'top', 'width', 'pageX', 'pageY']);");
JObject o = JObject.Parse(result);
// @formatter:off
height = (double)o["height"];
width = (double)o["width"];
screenX = (double)o["left"];
screenY = (double)o["top"];
right = (double)o["right"];
bottom = (double)o["bottom"];
pageX = (double)o["pageX"];
pageY = (double)o["pageY"];
// @formatter:on
// Альтернатива парсинга json:
// JavaScriptSerializer serializer = new JavaScriptSerializer();
// Dictionary<string, string> Loc = serializer.Deserialize<Dictionary<string, string>>("{'_a':'a'}");
}
public static void CreateCanvasField(Document doc, string jsContextVar)
{
JSHelper.Eval(doc, @"let canvas = document.createElement('canvas');
document.body.appendChild(canvas);
canvas.style.cssText = 'position: absolute; left: 0px; top: 0px;';
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;" +
jsContextVar + " = canvas.getContext('2d');");
}
// language=JS
public static string ConvertImageToBase64(Document doc, string jsNodeVar)
{
return(JSHelper.Eval(doc,
$"const img = {jsNodeVar};\n" +
"const canvas = document.createElement('canvas');\n" + // create DOM element without delete
"canvas.width = img.width;\n" +
"canvas.height = img.height;\n" +
"const ctx = canvas.getContext('2d');\n" +
"ctx.drawImage(img, 0, 0);\n" +
"return canvas.toDataURL('image/png').split(',')[1];"));
}
public static void ReloadPage(Document doc) => JSHelper.Eval(doc, "window.location.reload(true);");