From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- dom/svg/test/pointer-events.js | 328 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 328 insertions(+) create mode 100644 dom/svg/test/pointer-events.js (limited to 'dom/svg/test/pointer-events.js') 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 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 . 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(); +} -- cgit v1.2.3