/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

// Tests that the Filter Editor Widget parses filter values correctly (setCssValue)

const {CSSFilterEditorWidget} = require("devtools/client/shared/widgets/FilterWidget");
const DOMUtils =
      Cc["@mozilla.org/inspector/dom-utils;1"].getService(Ci.inIDOMUtils);

const TEST_URI = `data:text/html,<div id="filter-container" />`;

// Verify that the given string consists of a valid CSS URL token.
// Return true on success, false on error.
function verifyURL(string) {
  let lexer = DOMUtils.getCSSLexer(string);

  let token = lexer.nextToken();
  if (!token || token.tokenType !== "url") {
    return false;
  }

  return lexer.nextToken() === null;
}

add_task(function* () {
  let [host, win, doc] = yield createHost("bottom", TEST_URI);

  const container = doc.querySelector("#filter-container");
  let widget = new CSSFilterEditorWidget(container, "none");

  info("Test parsing of a valid CSS Filter value");
  widget.setCssValue("blur(2px) contrast(200%)");
  is(widget.getCssValue(),
     "blur(2px) contrast(200%)",
     "setCssValue should work for computed values");

  info("Test parsing of space-filled value");
  widget.setCssValue("blur(   2px  )   contrast(  2  )");
  is(widget.getCssValue(),
     "blur(2px) contrast(200%)",
     "setCssValue should work for spaced values");

  info("Test parsing of string-typed values");
  widget.setCssValue("drop-shadow( 2px  1px 5px black) url( example.svg#filter )");

  is(widget.getCssValue(),
     "drop-shadow(2px  1px 5px black) url(example.svg#filter)",
     "setCssValue should work for string-typed values");

  info("Test parsing of mixed-case function names");
  widget.setCssValue("BLUR(2px) Contrast(200%) Drop-Shadow(2px 1px 5px Black)");
  is(widget.getCssValue(),
     "BLUR(2px) Contrast(200%) Drop-Shadow(2px 1px 5px Black)",
     "setCssValue should work for mixed-case function names");

  info("Test parsing of invalid filter value");
  widget.setCssValue("totallyinvalid");
  is(widget.getCssValue(), "none",
     "setCssValue should turn completely invalid value to 'none'");

  info("Test parsing of invalid function argument");
  widget.setCssValue("blur('hello')");
  is(widget.getCssValue(), "blur(0px)",
     "setCssValue should replace invalid function argument with default");

  info("Test parsing of invalid function argument #2");
  widget.setCssValue("drop-shadow(whatever)");
  is(widget.getCssValue(), "drop-shadow()",
     "setCssValue should replace invalid drop-shadow argument with empty string");

  info("Test parsing of mixed invalid argument");
  widget.setCssValue("contrast(5%) whatever invert('xxx')");
  is(widget.getCssValue(), "contrast(5%) invert(0%)",
     "setCssValue should handle multiple errors");

  info("Test parsing of 'unset'");
  widget.setCssValue("unset");
  is(widget.getCssValue(), "unset", "setCssValue should handle 'unset'");
  info("Test parsing of 'initial'");
  widget.setCssValue("initial");
  is(widget.getCssValue(), "initial", "setCssValue should handle 'initial'");
  info("Test parsing of 'inherit'");
  widget.setCssValue("inherit");
  is(widget.getCssValue(), "inherit", "setCssValue should handle 'inherit'");

  info("Test parsing of quoted URL");
  widget.setCssValue("url('invalid ) when ) unquoted')");
  is(widget.getCssValue(), "url('invalid ) when ) unquoted')",
     "setCssValue should re-quote single-quoted URL contents");
  widget.setCssValue("url(\"invalid ) when ) unquoted\")");
  is(widget.getCssValue(), "url(\"invalid ) when ) unquoted\")",
     "setCssValue should re-quote double-quoted URL contents");
  widget.setCssValue("url(ordinary)");
  is(widget.getCssValue(), "url(ordinary)",
     "setCssValue should not quote ordinary unquoted URL contents");

  let quotedurl =
      "url(invalid\\ \\)\\ {\\\twhen\\ }\\ ;\\ \\\\unquoted\\'\\\")";
  ok(verifyURL(quotedurl), "weird URL is valid");
  widget.setCssValue(quotedurl);
  is(widget.getCssValue(), quotedurl,
     "setCssValue should re-quote weird unquoted URL contents");

  let dataurl = "url(data:image/svg+xml;utf8,<svg\\ " +
      "xmlns=\\\"http://www.w3.org/2000/svg\\\"><filter\\ id=\\\"blur\\\">" +
      "<feGaussianBlur\\ stdDeviation=\\\"3\\\"/></filter></svg>#blur)";
  ok(verifyURL(dataurl), "data URL is valid");
  widget.setCssValue(dataurl);
  is(widget.getCssValue(), dataurl, "setCssValue should not mangle data urls");
});
