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

"use strict";

// Tests the Filter Editor Widget's drag-drop re-ordering

const {
  CSSFilterEditorWidget,
} = require("resource://devtools/client/shared/widgets/FilterWidget.js");
const LIST_ITEM_HEIGHT = 32;

const TEST_URI = CHROME_URL_ROOT + "doc_filter-editor-01.html";

add_task(async function () {
  const { doc } = await createHost("bottom", TEST_URI);

  const container = doc.querySelector("#filter-container");
  const initialValue = "blur(2px) contrast(200%) brightness(200%)";
  const widget = new CSSFilterEditorWidget(container, initialValue);

  const filters = widget.el.querySelector("#filters");
  function first() {
    return filters.children[0];
  }
  function mid() {
    return filters.children[1];
  }
  function last() {
    return filters.children[2];
  }

  info("Test re-ordering neighbour filters");
  widget._mouseDown({
    target: first().querySelector("i"),
    pageY: 0,
  });
  widget._mouseMove({ pageY: LIST_ITEM_HEIGHT });

  // Element re-ordering should be instant
  is(
    mid().querySelector("label").textContent,
    "blur",
    "Should reorder elements correctly"
  );

  widget._mouseUp();

  is(
    widget.getCssValue(),
    "contrast(200%) blur(2px) brightness(200%)",
    "Should reorder filters objects correctly"
  );

  info("Test re-ordering first and last filters");
  widget._mouseDown({
    target: first().querySelector("i"),
    pageY: 0,
  });
  widget._mouseMove({ pageY: LIST_ITEM_HEIGHT * 2 });

  // Element re-ordering should be instant
  is(
    last().querySelector("label").textContent,
    "contrast",
    "Should reorder elements correctly"
  );
  widget._mouseUp();

  is(
    widget.getCssValue(),
    "brightness(200%) blur(2px) contrast(200%)",
    "Should reorder filters objects correctly"
  );

  info("Test dragging first element out of list");
  const boundaries = filters.getBoundingClientRect();

  widget._mouseDown({
    target: first().querySelector("i"),
    pageY: 0,
  });
  widget._mouseMove({ pageY: -LIST_ITEM_HEIGHT * 5 });
  Assert.greaterOrEqual(
    first().getBoundingClientRect().top,
    boundaries.top,
    "First filter should not move outside filter list"
  );

  widget._mouseUp();

  info("Test dragging last element out of list");
  widget._mouseDown({
    target: last().querySelector("i"),
    pageY: 0,
  });
  widget._mouseMove({ pageY: -LIST_ITEM_HEIGHT * 5 });
  Assert.lessOrEqual(
    last().getBoundingClientRect().bottom,
    boundaries.bottom,
    "Last filter should not move outside filter list"
  );

  widget._mouseUp();
  widget.destroy();
});