Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 328 insertions, 0 deletions

diff --git a/dom/svg/test/pointer-events.js b/dom/svg/test/pointer-events.js
new file mode 100644
index 0000000000..e65fd3d390
--- /dev/null
+++ b/dom/svg/test/pointer-events.js
@@ -0,0 +1,328 @@
+SimpleTest.waitForExplicitFinish();
+
+var pointer_events_values = [
+  "auto",
+  "visiblePainted",
+  "visibleFill",
+  "visibleStroke",
+  "visible",
+  "painted",
+  "fill",
+  "stroke",
+  "all",
+  "none",
+];
+
+var paint_values = ["blue", "transparent", "none"];
+
+var opacity_values = ["1", "0.5", "0"];
+
+var visibility_values = ["visible", "hidden", "collapse"];
+
+/**
+ * List of attributes and various values for which we want to test permutations
+ * when hit testing a pointer event that is over an element's fill area,
+ * stroke area, or both (where they overlap).
+ *
+ * We're using an array of objects so that we have control over the order in
+ * which permutations are tested.
+ *
+ * TODO: test the effect of clipping, masking, filters, markers, etc.
+ */
+var hit_test_inputs = {
+  fill: [
+    { name: "pointer-events", values: pointer_events_values },
+    { name: "fill", values: paint_values },
+    { name: "fill-opacity", values: opacity_values },
+    { name: "opacity", values: opacity_values },
+    { name: "visibility", values: visibility_values },
+  ],
+  stroke: [
+    { name: "pointer-events", values: pointer_events_values },
+    { name: "stroke", values: paint_values },
+    { name: "stroke-opacity", values: opacity_values },
+    { name: "opacity", values: opacity_values },
+    { name: "visibility", values: visibility_values },
+  ],
+  both: [
+    { name: "pointer-events", values: pointer_events_values },
+    { name: "fill", values: paint_values },
+    { name: "fill-opacity", values: opacity_values },
+    { name: "stroke", values: paint_values },
+    { name: "stroke-opacity", values: opacity_values },
+    { name: "opacity", values: opacity_values },
+    { name: "visibility", values: visibility_values },
+  ],
+};
+
+/**
+ * The following object contains a list of 'pointer-events' property values,
+ * each with an object detailing the conditions under which the fill and stroke
+ * of a graphical object will intercept pointer events for the given value. If
+ * the object contains a 'fill-intercepts-iff' property then the fill is
+ * expected to intercept pointer events for that value of 'pointer-events' if
+ * and only if the conditions listed in the 'fill-intercepts-iff' object are
+ * met. If there are no conditions in the 'fill-intercepts-iff' object then the
+ * fill should always intercept pointer events. However, if the
+ * 'fill-intercepts-iff' property is not set at all then it indicates that the
+ * fill should never intercept pointer events. The same rules apply for
+ * 'stroke-intercepts-iff'.
+ *
+ * If an attribute name in the conditions list is followed by the "!"
+ * character then the requirement for a hit is that its value is NOT any
+ * of the values listed in the given array.
+ */
+var hit_conditions = {
+  auto: {
+    "fill-intercepts-iff": {
+      visibility: ["visible"],
+      "fill!": ["none"],
+    },
+    "stroke-intercepts-iff": {
+      visibility: ["visible"],
+      "stroke!": ["none"],
+    },
+  },
+  visiblePainted: {
+    "fill-intercepts-iff": {
+      visibility: ["visible"],
+      "fill!": ["none"],
+    },
+    "stroke-intercepts-iff": {
+      visibility: ["visible"],
+      "stroke!": ["none"],
+    },
+  },
+  visibleFill: {
+    "fill-intercepts-iff": {
+      visibility: ["visible"],
+    },
+    // stroke never intercepts pointer events
+  },
+  visibleStroke: {
+    // fill never intercepts pointer events
+    "stroke-intercepts-iff": {
+      visibility: ["visible"],
+    },
+  },
+  visible: {
+    "fill-intercepts-iff": {
+      visibility: ["visible"],
+    },
+    "stroke-intercepts-iff": {
+      visibility: ["visible"],
+    },
+  },
+  painted: {
+    "fill-intercepts-iff": {
+      "fill!": ["none"],
+    },
+    "stroke-intercepts-iff": {
+      "stroke!": ["none"],
+    },
+  },
+  fill: {
+    "fill-intercepts-iff": {
+      // fill always intercepts pointer events
+    },
+    // stroke never intercepts pointer events
+  },
+  stroke: {
+    // fill never intercepts pointer events
+    "stroke-intercepts-iff": {
+      // stroke always intercepts pointer events
+    },
+  },
+  all: {
+    "fill-intercepts-iff": {
+      // fill always intercepts pointer events
+    },
+    "stroke-intercepts-iff": {
+      // stroke always intercepts pointer events
+    },
+  },
+  none: {
+    // neither fill nor stroke intercept pointer events
+  },
+};
+
+// bit flags
+var POINT_OVER_FILL = 0x1;
+var POINT_OVER_STROKE = 0x2;
+
+/**
+ * Examine the element's attribute values and, based on the area(s) of the
+ * element that the pointer event is over (fill and/or stroke areas), return
+ * true if the element is expected to intercept the event, otherwise false.
+ */
+function hit_expected(
+  element,
+  over /* bit flags indicating which area(s) of the element the pointer is over */
+) {
+  function expect_hit(target) {
+    var intercepts_iff =
+      hit_conditions[element.getAttribute("pointer-events")][
+        target + "-intercepts-iff"
+      ];
+
+    if (!intercepts_iff) {
+      return false; // never intercepts events
+    }
+
+    for (var attr in intercepts_iff) {
+      var vals = intercepts_iff[attr]; // must get this before we adjust 'attr'
+      var invert = false;
+      if (attr.substr(-1) == "!") {
+        invert = true;
+        attr = attr.substr(0, attr.length - 1);
+      }
+      var match = vals.indexOf(element.getAttribute(attr)) > -1;
+      if (invert) {
+        match = !match;
+      }
+      if (!match) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+
+  return (
+    ((over & POINT_OVER_FILL) != 0 && expect_hit("fill")) ||
+    ((over & POINT_OVER_STROKE) != 0 && expect_hit("stroke"))
+  );
+}
+
+function for_all_permutations(inputs, callback) {
+  var current_permutation = arguments[2] || {};
+  var index = arguments[3] || 0;
+
+  if (index < inputs.length) {
+    var name = inputs[index].name;
+    var values = inputs[index].values;
+    for (var i = 0; i < values.length; ++i) {
+      current_permutation[name] = values[i];
+      for_all_permutations(inputs, callback, current_permutation, index + 1);
+    }
+    return;
+  }
+
+  callback(current_permutation);
+}
+
+function make_log_msg(over, tag, attributes) {
+  var target;
+  if (over == (POINT_OVER_FILL | POINT_OVER_STROKE)) {
+    target = "fill and stroke";
+  } else if (over == POINT_OVER_FILL) {
+    target = "fill";
+  } else if (over == POINT_OVER_STROKE) {
+    target = "stroke";
+  } else {
+    throw new Error("unexpected bit combination in 'over'");
+  }
+  var msg =
+    "Check if events are intercepted at a point over the " +
+    target +
+    " on <" +
+    tag +
+    "> for";
+  for (var attr in attributes) {
+    msg += " " + attr + "=" + attributes[attr];
+  }
+  return msg;
+}
+
+var dx, dy; // offset of <svg> element from pointer coordinates origin
+
+function test_element(
+  id,
+  x,
+  y,
+  over /* bit flags indicating which area(s) of the element the pointer is over */
+) {
+  var element = document.getElementById(id);
+  var tag = element.tagName;
+
+  function test_permutation(attributes) {
+    for (var attr in attributes) {
+      element.setAttribute(attr, attributes[attr]);
+    }
+    var hits = document.elementFromPoint(dx + x, dy + y) == element;
+    var msg = make_log_msg(over, tag, attributes);
+
+    is(hits, hit_expected(element, over), msg);
+  }
+
+  var inputs;
+  if (over == (POINT_OVER_FILL | POINT_OVER_STROKE)) {
+    inputs = hit_test_inputs.both;
+  } else if (over == POINT_OVER_FILL) {
+    inputs = hit_test_inputs.fill;
+  } else if (over == POINT_OVER_STROKE) {
+    inputs = hit_test_inputs.stroke;
+  } else {
+    throw new Error("unexpected bit combination in 'over'");
+  }
+
+  for_all_permutations(inputs, test_permutation);
+
+  // To reduce the chance of bogus results in subsequent tests:
+  element.setAttribute("fill", "none");
+  element.setAttribute("stroke", "none");
+}
+
+function run_tests(subtest) {
+  var div = document.getElementById("div");
+  dx = div.offsetLeft;
+  dy = div.offsetTop;
+
+  // Run the test with only a subset of pointer-events values, to avoid
+  // running over the mochitest time limit.  The subtest argument indicates
+  // whether to use the first half of the pointer-events values (0)
+  // or the second half (1).
+  var partition = Math.floor(pointer_events_values.length / 2);
+  switch (subtest) {
+    case 0:
+      pointer_events_values.splice(partition);
+      break;
+    case 1:
+      pointer_events_values.splice(0, partition);
+      break;
+    case 2:
+      throw new Error("unexpected subtest number");
+  }
+
+  test_element("rect", 30, 30, POINT_OVER_FILL);
+  test_element("rect", 5, 5, POINT_OVER_STROKE);
+
+  // The SVG 1.1 spec essentially says that, for text, hit testing is done
+  // against the character cells of the text, and not the fill and stroke as
+  // you might expect for a normal graphics element like <path>. See the
+  // paragraph starting "For text elements..." in this section:
+  //
+  //   http://www.w3.org/TR/SVG11/interact.html#PointerEventsProperty
+  //
+  // This requirement essentially means that for the purposes of hit testing
+  // the fill and stroke areas are the same area - the character cell. (At
+  // least until we support having any fill or stroke that lies outside the
+  // character cells intercept events like Opera does - see below.) Thus, for
+  // text, when a pointer event is over a character cell it is essentially over
+  // both the fill and stroke at the same time. That's the reason we pass both
+  // the POINT_OVER_FILL and POINT_OVER_STROKE bits in test_element's 'over'
+  // argument below. It's also the reason why we only test one point in the
+  // text rather than having separate tests for fill and stroke.
+  //
+  // For hit testing of text, Opera essentially treats fill and stroke like it
+  // would on any normal element, but it adds the character cells of glyhs to
+  // both the glyphs' fill AND stroke. I think this is what we should do too.
+  // It's compatible with the letter of the SVG 1.1 rules, and it allows any
+  // parts of a glyph that are outside the glyph's character cells to also
+  // intercept events in the normal way. When we make that change we'll be able
+  // to add separate fill and stroke tests for text below.
+
+  test_element("text", 210, 30, POINT_OVER_FILL | POINT_OVER_STROKE);
+
+  SimpleTest.finish();
+}