lib/ui/src/style/test.zig
daab053ee43316e1809a84551d573ddd1e5bf3d2
1 const std = @import("std");
2 const css = @import("css");
3 const abi = @import("../abi/root.zig");
4 const tree = @import("../tree/root.zig");
5 const element = @import("element.zig");
6 const paint = @import("paint.zig");
7 const asset = @import("../asset/root.zig");
8 const generation = @import("generation.zig");
9 const media = @import("media.zig");
10
11 test {
12 _ = @import("computed.zig");
13 _ = @import("share.zig");
14 _ = @import("generation.zig");
15 }
16
17 test "style element walks parents and siblings in a flat preorder tree" {
18 const nodes = [_]abi.Node{
19 .{ .id = 1, .subtree_count = 4, .kind = @backingInt(abi.Kind.box) },
20 .{ .id = 2, .parent = 0, .subtree_count = 1, .kind = @backingInt(abi.Kind.box) },
21 .{ .id = 3, .parent = 1, .kind = @backingInt(abi.Kind.text) },
22 .{ .id = 4, .parent = 0, .kind = @backingInt(abi.Kind.box) },
23 .{ .id = 5, .parent = 0, .kind = @backingInt(abi.Kind.text) },
24 };
25 const sheet = css.StyleSheet{};
26 var adapter = element.Adapter{ .view = tree.View{ .nodes = &nodes }, .sheet = &sheet };
27 const callback = adapter.element();
28 try std.testing.expectEqual(@as(u32, 1), callback.parent(callback.context, 2));
29 try std.testing.expectEqual(@as(u32, 1), callback.previous(callback.context, 3));
30 try std.testing.expectEqual(@as(u32, 3), callback.previous(callback.context, 4));
31 try std.testing.expectEqual(@as(u32, 1), callback.previous(callback.context, 1));
32 try std.testing.expectEqual(css.match.packSibling(2, 3), callback.sibling_index(callback.context, 3, false));
33 }
34
35 test "style pseudo maps published state and derives interaction along ancestry" {
36 const nodes = [_]abi.Node{
37 .{ .id = 1, .subtree_count = 2 },
38 .{ .id = 2, .parent = 0, .subtree_count = 1, .state = abi.state(.selected) },
39 .{ .id = 3, .parent = 1 },
40 };
41 const sheet = css.StyleSheet{};
42 var adapter = element.Adapter{
43 .view = tree.View{ .nodes = &nodes },
44 .sheet = &sheet,
45 .interaction = .{ .hovered = 3, .focused = 3, .keyboard_focus = true },
46 };
47 const callback = adapter.element();
48 const row = callback.pseudo(callback.context, 1);
49 const cell = callback.pseudo(callback.context, 2);
50 try std.testing.expect(row & css.selector.bit(.selected) != 0);
51 try std.testing.expect(row & css.selector.bit(.hover) != 0);
52 try std.testing.expect(row & css.selector.bit(.focus_within) != 0);
53 try std.testing.expect(cell & css.selector.bit(.focus_visible) != 0);
54 adapter.interaction.keyboard_focus = false;
55 try std.testing.expect(callback.pseudo(callback.context, 2) & css.selector.bit(.focus_visible) == 0);
56 }
57
58 test "style paint records keep their declared byte layouts" {
59 try std.testing.expectEqual(@as(usize, 84), @sizeOf(paint.Paint));
60 try std.testing.expectEqual(@as(usize, 32), @sizeOf(paint.ImagePaint));
61 try std.testing.expectEqual(@as(usize, 56), @sizeOf(paint.TextStyle));
62 }
63
64 test "style lowering resolves a registered primary face and refreshes on release" {
65 const allocator = std.testing.allocator;
66 var registry = try asset.Registry.init(allocator, .{ .fonts = 2, .images = 0, .owned_bytes = 0 });
67 defer registry.deinit(allocator);
68 registry.activate();
69 const sans = try registry.registerFont("Noto Sans", .{}, .{ .borrowed = "" });
70 const mono = try registry.registerFont("Iosevka", .{ .monospace = 1 }, .{ .borrowed = "" });
71 var workspace = css.Workspace.init(allocator);
72 defer workspace.deinit();
73 const sheet = try workspace.parse("text { font-family: 'Iosevka', 'Noto Sans', Iosevka; font-weight: bold; }", .default());
74 const nodes = [_]abi.Node{.{ .id = 1, .kind = @backingInt(abi.Kind.text) }};
75 const view = tree.View{ .nodes = &nodes };
76 var engine = try generation.Engine.init(allocator, .{ .nodes = 1, .distinct_styles = 4, .selectors = 4, .bytes = 16 * 1024 });
77 defer engine.deinit(allocator);
78 engine.activate();
79 try engine.setFonts(®istry);
80 _ = try engine.cascadeView(view, &.{0}, &sheet, 1, .{});
81 try std.testing.expectEqual(mono, engine.record(0).text.face);
82 try std.testing.expectEqualSlices(asset.AssetHandle, &.{sans}, engine.authoredFallbacks(0));
83 try registry.release(.font, mono);
84 const changed = try engine.cascadeView(view, &.{}, &sheet, 1, .{});
85 try std.testing.expectEqual(@as(u32, 1), changed.restyled);
86 try std.testing.expectEqual(sans, engine.record(0).text.face);
87 try std.testing.expectEqual(@as(usize, 0), engine.authoredFallbacks(0).len);
88 }
89
90 test "stylesheet replacement resolves a new family with equal cascade bytes" {
91 const allocator = std.testing.allocator;
92 var registry = try asset.Registry.init(allocator, .{ .fonts = 2, .images = 0, .owned_bytes = 0 });
93 defer registry.deinit(allocator);
94 registry.activate();
95 const first_face = try registry.registerFont("Iosevka", .{}, .{ .borrowed = "" });
96 const second_face = try registry.registerFont("Fixture", .{}, .{ .borrowed = "" });
97 var first_workspace = css.Workspace.init(allocator);
98 defer first_workspace.deinit();
99 var second_workspace = css.Workspace.init(allocator);
100 defer second_workspace.deinit();
101 const first = try first_workspace.parse("text { font-family: Iosevka; }", .default());
102 const second = try second_workspace.parse("text { font-family: Fixture; }", .default());
103 const nodes = [_]abi.Node{.{ .id = 1, .kind = @backingInt(abi.Kind.text) }};
104 const view = tree.View{ .nodes = &nodes };
105 var engine = try generation.Engine.init(allocator, .{ .nodes = 1, .distinct_styles = 4, .selectors = 4, .bytes = 16 * 1024 });
106 defer engine.deinit(allocator);
107 engine.activate();
108 try engine.setFonts(®istry);
109 _ = try engine.cascadeView(view, &.{0}, &first, 1, .{});
110 try std.testing.expectEqual(first_face, engine.record(0).text.face);
111 _ = try engine.cascadeView(view, &.{}, &second, 2, .{});
112 try std.testing.expectEqual(second_face, engine.record(0).text.face);
113 }
114
115 test "style lowering reads an inline font handle from the admitted declaration" {
116 const allocator = std.testing.allocator;
117 var registry = try asset.Registry.init(allocator, .{ .fonts = 1, .images = 0, .owned_bytes = 0 });
118 defer registry.deinit(allocator);
119 registry.activate();
120 const face = try registry.registerFont("Fixture", .{}, .{ .borrowed = "" });
121 const declarations = [_]abi.Declaration{.{
122 .property = @backingInt(abi.PropertyId.font_family),
123 .kind = @backingInt(css.value.Kind.asset),
124 .unit = 0,
125 .flags = 0,
126 .a = face.index,
127 .b = face.generation,
128 }};
129 const nodes = [_]abi.Node{.{ .id = 1, .kind = @backingInt(abi.Kind.text), .declaration_count = 1 }};
130 const view = tree.View{ .nodes = &nodes, .declarations = &declarations };
131 const sheet = css.StyleSheet{};
132 var engine = try generation.Engine.init(allocator, .{ .nodes = 1, .distinct_styles = 2, .selectors = 1, .bytes = 16 * 1024 });
133 defer engine.deinit(allocator);
134 engine.activate();
135 try engine.setFonts(®istry);
136 _ = try engine.cascadeView(view, &.{0}, &sheet, 1, .{});
137 try std.testing.expectEqual(face, engine.record(0).text.face);
138 }
139
140 test "style media environment filters sheets before cascade" {
141 const allocator = std.testing.allocator;
142 const source = "box { color: blue; } @media (prefers-color-scheme: dark) { box { color: red; } }";
143 var dark_workspace = css.Workspace.init(allocator);
144 defer dark_workspace.deinit();
145 var light_workspace = css.Workspace.init(allocator);
146 defer light_workspace.deinit();
147 const header = abi.Header{ .viewport = .{ .width = 1200, .height = 800 }, .root_font_size = 16 };
148 const dark = try (media.Environment.fromHeader(header, .dark, .no_preference)).parse(&dark_workspace, source);
149 const light = try (media.Environment.fromHeader(header, .light, .no_preference)).parse(&light_workspace, source);
150 const nodes = [_]abi.Node{.{ .id = 1, .kind = @backingInt(abi.Kind.box) }};
151 const view = tree.View{ .header = header, .nodes = &nodes };
152 var engine = try generation.Engine.init(allocator, .{ .nodes = 1, .distinct_styles = 4, .selectors = 4, .bytes = 16 * 1024 });
153 defer engine.deinit(allocator);
154 engine.activate();
155 _ = try engine.cascadeView(view, &.{0}, &dark, 1, .{});
156 try std.testing.expect(engine.record(0).paint.foreground.r > engine.record(0).paint.foreground.b);
157 _ = try engine.cascadeView(view, &.{}, &light, 2, .{});
158 try std.testing.expect(engine.record(0).paint.foreground.b > engine.record(0).paint.foreground.r);
159 }
160
161 test "hover crossing two row boundaries restyles eighteen nodes" {
162 const allocator = std.testing.allocator;
163 var workspace = css.Workspace.init(allocator);
164 defer workspace.deinit();
165 const sheet = try workspace.parse(".row:hover .cell { color: #ff0000; }", .default());
166 var nodes: [128]abi.Node = undefined;
167 var classes: [18]u32 = undefined;
168 nodes[0] = .{ .id = 1, .subtree_count = 127 };
169 for (0..2) |row| {
170 const first = 1 + row * 9;
171 nodes[first] = .{
172 .id = @intCast(first + 1),
173 .parent = 0,
174 .subtree_count = 8,
175 .class_first = @intCast(row * 9),
176 .class_count = 1,
177 };
178 classes[row * 9] = 1;
179 for (0..8) |column| {
180 const at = first + column + 1;
181 nodes[at] = .{
182 .id = @intCast(at + 1),
183 .parent = @intCast(first),
184 .class_first = @intCast(row * 9 + column + 1),
185 .class_count = 1,
186 };
187 classes[row * 9 + column + 1] = 2;
188 }
189 }
190 for (19..nodes.len) |at| nodes[at] = .{ .id = @intCast(at + 1), .parent = 0 };
191 const atoms = [_]abi.Atom{ .{}, .{ .offset = 0, .len = 3 }, .{ .offset = 3, .len = 4 } };
192 const view = tree.View{
193 .header = .{ .root_font_size = 16 },
194 .nodes = &nodes,
195 .classes = &classes,
196 .atoms = &atoms,
197 .strings = "rowcell",
198 };
199 var engine = try @import("generation.zig").Engine.init(allocator, .{
200 .nodes = 128,
201 .distinct_styles = 8,
202 .selectors = 4,
203 .bytes = 64 * 1024,
204 });
205 defer engine.deinit(allocator);
206 engine.activate();
207 _ = try engine.cascadeView(view, &.{}, &sheet, 1, .{ .hovered = 2 });
208 const crossing = try engine.cascadeView(view, &.{}, &sheet, 1, .{ .hovered = 11 });
209 try std.testing.expectEqual(@as(u32, 18), crossing.restyled);
210 try std.testing.expectEqual(@as(u32, 18), crossing.visited);
211 engine.hover_filter_enabled = false;
212 const baseline = try engine.cascadeView(view, &.{}, &sheet, 1, .{ .hovered = 2 });
213 try std.testing.expectEqual(@as(u32, 128), baseline.restyled);
214 try std.testing.expectEqual(@as(u32, 128), baseline.visited);
215 }
216
217 test "hover crossing visits eighteen nodes in a 16384 node tree" {
218 const allocator = std.testing.allocator;
219 var workspace = css.Workspace.init(allocator);
220 defer workspace.deinit();
221 const sheet = try workspace.parse(".row:hover .cell { color: #ff0000; }", .default());
222 const count = 16_384;
223 const nodes = try allocator.alloc(abi.Node, count);
224 defer allocator.free(nodes);
225 var classes: [18]u32 = undefined;
226 nodes[0] = .{ .id = 1, .subtree_count = count - 1 };
227 for (0..2) |row| {
228 const first = 1 + row * 9;
229 nodes[first] = .{
230 .id = @intCast(first + 1),
231 .parent = 0,
232 .subtree_count = 8,
233 .class_first = @intCast(row * 9),
234 .class_count = 1,
235 };
236 classes[row * 9] = 1;
237 for (0..8) |column| {
238 const at = first + column + 1;
239 nodes[at] = .{
240 .id = @intCast(at + 1),
241 .parent = @intCast(first),
242 .class_first = @intCast(row * 9 + column + 1),
243 .class_count = 1,
244 };
245 classes[row * 9 + column + 1] = 2;
246 }
247 }
248 for (19..count) |at| nodes[at] = .{ .id = @intCast(at + 1), .parent = 0 };
249 const atoms = [_]abi.Atom{ .{}, .{ .offset = 0, .len = 3 }, .{ .offset = 3, .len = 4 } };
250 const map_slots = try allocator.alloc(u32, 32_768);
251 defer allocator.free(map_slots);
252 var identity = tree.Map{ .slots = map_slots };
253 identity.reset();
254 for (nodes, 0..) |_, at| try std.testing.expect(identity.insert(nodes, @intCast(at)));
255 const view = tree.View{
256 .header = .{ .root_font_size = 16 },
257 .nodes = nodes,
258 .identity = &identity,
259 .classes = &classes,
260 .atoms = &atoms,
261 .strings = "rowcell",
262 };
263 var engine = try @import("generation.zig").Engine.init(allocator, .{});
264 defer engine.deinit(allocator);
265 engine.activate();
266 const full = try engine.cascadeView(view, &.{}, &sheet, 1, .{ .hovered = 2 });
267 try std.testing.expectEqual(@as(u32, count), full.visited);
268 const crossing = try engine.cascadeView(view, &.{}, &sheet, 1, .{ .hovered = 11 });
269 try std.testing.expectEqual(@as(u32, 18), crossing.restyled);
270 try std.testing.expectEqual(@as(u32, 18), crossing.visited);
271 }
272
273 test "a 5000 row scroll carries survivors and visits only style inputs" {
274 const allocator = std.testing.allocator;
275 const count = 10_001;
276 const old_nodes = try allocator.alloc(abi.Node, count);
277 defer allocator.free(old_nodes);
278 const new_nodes = try allocator.alloc(abi.Node, count);
279 defer allocator.free(new_nodes);
280 const classes = try allocator.alloc(u32, count);
281 defer allocator.free(classes);
282 const prior = try allocator.alloc(u32, count);
283 defer allocator.free(prior);
284 old_nodes[0] = .{ .id = 1, .revision = 1, .subtree_count = count - 1 };
285 new_nodes[0] = .{ .id = 1, .revision = 2, .subtree_count = count - 1 };
286 prior[0] = tree.prior_dirty;
287 classes[0] = 0;
288 for (0..5_000) |row| {
289 const at = 1 + row * 2;
290 old_nodes[at] = .{ .id = @intCast(2 + row), .revision = 1, .parent = 0, .subtree_count = 1, .class_first = @intCast(at), .class_count = 1 };
291 old_nodes[at + 1] = .{ .id = @intCast(10_002 + row), .revision = 1, .parent = @intCast(at) };
292 new_nodes[at] = .{ .id = @intCast(3 + row), .revision = 1, .parent = 0, .subtree_count = 1, .class_first = @intCast(at), .class_count = 1 };
293 new_nodes[at + 1] = .{ .id = @intCast(10_003 + row), .revision = 1, .parent = @intCast(at) };
294 classes[at] = 1;
295 classes[at + 1] = 0;
296 prior[at] = if (row == 4_999) tree.prior_dirty | tree.prior_absent else @intCast(at + 2);
297 prior[at + 1] = if (row == 4_999) tree.prior_dirty | tree.prior_absent else @intCast(at + 3);
298 }
299 const atoms = [_]abi.Atom{ .{}, .{ .offset = 0, .len = 3 } };
300 const old_view = tree.View{ .header = .{ .revision = 1, .root_font_size = 16 }, .nodes = old_nodes, .classes = classes, .atoms = &atoms, .strings = "row" };
301 const new_view = tree.View{ .header = .{ .revision = 2, .base_revision = 1, .root_font_size = 16 }, .nodes = new_nodes, .classes = classes, .atoms = &atoms, .strings = "row", .prior = prior };
302 const dirty = [_]u32{ 0, 9_999, 10_000 };
303 var workspace = css.Workspace.init(allocator);
304 defer workspace.deinit();
305 const ordinary = try workspace.parse(".row { background-color: #102030; }", .default());
306 var engine = try @import("generation.zig").Engine.init(allocator, .{});
307 defer engine.deinit(allocator);
308 engine.activate();
309 _ = try engine.cascadeView(old_view, &.{}, &ordinary, 1, .{});
310 const moved = try engine.cascadeView(new_view, &dirty, &ordinary, 1, .{});
311 try std.testing.expectEqual(@as(u32, 2), moved.visited);
312 try std.testing.expectEqual(@as(u32, 2), moved.restyled);
313 try std.testing.expectEqual(@as(u32, 9_999), moved.carried);
314 try std.testing.expectEqual(@as(u64, 239_976), moved.carried_bytes);
315 var cold = try @import("generation.zig").Engine.init(allocator, .{});
316 defer cold.deinit(allocator);
317 cold.activate();
318 _ = try cold.cascadeView(new_view, &dirty, &ordinary, 1, .{});
319 for (0..count) |at| {
320 try std.testing.expect(std.meta.eql(engine.record(@intCast(at)).computed, cold.record(@intCast(at)).computed));
321 }
322 const positional = try workspace.parse(".row:nth-child(2n+1) { background-color: transparent; }", .default());
323 var positional_engine = try @import("generation.zig").Engine.init(allocator, .{});
324 defer positional_engine.deinit(allocator);
325 positional_engine.activate();
326 _ = try positional_engine.cascadeView(old_view, &.{}, &positional, 1, .{});
327 const shifted = try positional_engine.cascadeView(new_view, &dirty, &positional, 1, .{});
328 try std.testing.expectEqual(@as(u32, 5_001), shifted.visited);
329 try std.testing.expectEqual(@as(u32, 5_001), shifted.restyled);
330 try std.testing.expectEqual(@as(u32, 9_999), shifted.carried);
331 try std.testing.expectEqual(@as(u64, 239_976), shifted.carried_bytes);
332 }
333
334 test "reparenting refreshes old and new sibling positions" {
335 const allocator = std.testing.allocator;
336 var workspace = css.Workspace.init(allocator);
337 defer workspace.deinit();
338 const sheet = try workspace.parse("box:nth-child(2) { color: #ff0000; }", .default());
339 const kind = @backingInt(abi.Kind.box);
340 const before = [_]abi.Node{
341 .{ .id = 1, .revision = 1, .kind = kind, .subtree_count = 5 },
342 .{ .id = 2, .revision = 1, .kind = kind, .parent = 0, .subtree_count = 3 },
343 .{ .id = 4, .revision = 1, .kind = kind, .parent = 1 },
344 .{ .id = 5, .revision = 1, .kind = kind, .parent = 1 },
345 .{ .id = 6, .revision = 1, .kind = kind, .parent = 1 },
346 .{ .id = 3, .revision = 1, .kind = kind, .parent = 0 },
347 };
348 const after = [_]abi.Node{
349 .{ .id = 1, .revision = 2, .kind = kind, .subtree_count = 5 },
350 .{ .id = 2, .revision = 2, .kind = kind, .parent = 0, .subtree_count = 2 },
351 .{ .id = 4, .revision = 1, .kind = kind, .parent = 1 },
352 .{ .id = 6, .revision = 1, .kind = kind, .parent = 1 },
353 .{ .id = 3, .revision = 2, .kind = kind, .parent = 0, .subtree_count = 1 },
354 .{ .id = 5, .revision = 1, .kind = kind, .parent = 4 },
355 };
356 const prior = [_]u32{ tree.prior_dirty, tree.prior_dirty | 1, 2, 4, tree.prior_dirty | 5, 3 };
357 var slots: [16]u32 = undefined;
358 var identity = tree.Map{ .slots = &slots };
359 identity.reset();
360 for (after, 0..) |_, at| try std.testing.expect(identity.insert(&after, @intCast(at)));
361 const old_view = tree.View{ .header = .{ .revision = 1, .root_font_size = 16 }, .nodes = &before };
362 const new_view = tree.View{ .header = .{ .revision = 2, .base_revision = 1, .root_font_size = 16 }, .nodes = &after, .identity = &identity, .prior = &prior };
363 const dirty = [_]u32{ 0, 1, 4 };
364 var engine = try @import("generation.zig").Engine.init(allocator, .{ .nodes = 6, .distinct_styles = 8, .selectors = 4, .bytes = 64 * 1024 });
365 defer engine.deinit(allocator);
366 engine.activate();
367 _ = try engine.cascadeView(old_view, &.{}, &sheet, 1, .{});
368 const old_color = engine.record(4).paint.foreground;
369 const moved = try engine.cascadeView(new_view, &dirty, &sheet, 1, .{});
370 try std.testing.expectEqual(@as(u32, 5), moved.visited);
371 try std.testing.expect(!std.meta.eql(old_color, engine.record(3).paint.foreground));
372 var cold = try @import("generation.zig").Engine.init(allocator, .{ .nodes = 6, .distinct_styles = 8, .selectors = 4, .bytes = 64 * 1024 });
373 defer cold.deinit(allocator);
374 cold.activate();
375 _ = try cold.cascadeView(new_view, &dirty, &sheet, 1, .{});
376 for (after, 0..) |_, at| {
377 try std.testing.expect(std.meta.eql(engine.record(@intCast(at)).computed, cold.record(@intCast(at)).computed));
378 }
379 }
380
381 test "reparenting a hovered node updates both ancestor chains" {
382 const allocator = std.testing.allocator;
383 var workspace = css.Workspace.init(allocator);
384 defer workspace.deinit();
385 const sheet = try workspace.parse(".hot:hover .leaf { color: red; }", .default());
386 const before = [_]abi.Node{
387 .{ .id = 1, .revision = 1, .subtree_count = 5 },
388 .{ .id = 2, .revision = 1, .parent = 0, .subtree_count = 2, .class_first = 0, .class_count = 1 },
389 .{ .id = 10, .revision = 1, .parent = 1, .class_first = 1, .class_count = 1 },
390 .{ .id = 11, .revision = 1, .parent = 1, .class_first = 2, .class_count = 1 },
391 .{ .id = 3, .revision = 1, .parent = 0, .subtree_count = 1, .class_first = 3, .class_count = 1 },
392 .{ .id = 12, .revision = 1, .parent = 4, .class_first = 4, .class_count = 1 },
393 };
394 const after = [_]abi.Node{
395 .{ .id = 1, .revision = 2, .subtree_count = 5 },
396 .{ .id = 2, .revision = 2, .parent = 0, .subtree_count = 1, .class_first = 0, .class_count = 1 },
397 .{ .id = 11, .revision = 1, .parent = 1, .class_first = 1, .class_count = 1 },
398 .{ .id = 3, .revision = 2, .parent = 0, .subtree_count = 2, .class_first = 2, .class_count = 1 },
399 .{ .id = 10, .revision = 1, .parent = 3, .class_first = 3, .class_count = 1 },
400 .{ .id = 12, .revision = 1, .parent = 3, .class_first = 4, .class_count = 1 },
401 };
402 const before_classes = [_]u32{ 1, 2, 2, 1, 2 };
403 const after_classes = [_]u32{ 1, 2, 1, 2, 2 };
404 const atoms = [_]abi.Atom{ .{}, .{ .offset = 0, .len = 3 }, .{ .offset = 3, .len = 4 } };
405 const prior = [_]u32{ tree.prior_dirty, tree.prior_dirty | 1, 3, tree.prior_dirty | 4, 2, 5 };
406 var slots: [16]u32 = undefined;
407 var identity = tree.Map{ .slots = &slots };
408 identity.reset();
409 for (after, 0..) |_, at| try std.testing.expect(identity.insert(&after, @intCast(at)));
410 const old_view = tree.View{ .header = .{ .revision = 1, .root_font_size = 16 }, .nodes = &before, .classes = &before_classes, .atoms = &atoms, .strings = "hotleaf" };
411 const new_view = tree.View{ .header = .{ .revision = 2, .base_revision = 1, .root_font_size = 16 }, .nodes = &after, .classes = &after_classes, .atoms = &atoms, .strings = "hotleaf", .identity = &identity, .prior = &prior };
412 const dirty = [_]u32{ 0, 1, 3 };
413 var engine = try @import("generation.zig").Engine.init(allocator, .{ .nodes = 6, .distinct_styles = 8, .selectors = 4, .bytes = 64 * 1024 });
414 defer engine.deinit(allocator);
415 engine.activate();
416 const interaction = element.Interaction{ .hovered = 10 };
417 _ = try engine.cascadeView(old_view, &.{}, &sheet, 1, interaction);
418 const moved = try engine.cascadeView(new_view, &dirty, &sheet, 1, interaction);
419 try std.testing.expectEqual(@as(u32, 5), moved.visited);
420 var cold = try @import("generation.zig").Engine.init(allocator, .{ .nodes = 6, .distinct_styles = 8, .selectors = 4, .bytes = 64 * 1024 });
421 defer cold.deinit(allocator);
422 cold.activate();
423 _ = try cold.cascadeView(new_view, &dirty, &sheet, 1, interaction);
424 for (after, 0..) |_, at| {
425 try std.testing.expect(std.meta.eql(engine.record(@intCast(at)).computed, cold.record(@intCast(at)).computed));
426 }
427 }
428
429 test "ancestor class invalidation walks descendants only for named classes" {
430 const allocator = std.testing.allocator;
431 var workspace = css.Workspace.init(allocator);
432 defer workspace.deinit();
433 const sheet = try workspace.parse(".row .cell { color: #ff0000; }", .default());
434 const atoms = [_]abi.Atom{
435 .{},
436 .{ .offset = 0, .len = 3 },
437 .{ .offset = 3, .len = 4 },
438 .{ .offset = 7, .len = 5 },
439 .{ .offset = 12, .len = 5 },
440 };
441 const nodes = [_]abi.Node{
442 .{ .id = 1, .subtree_count = 2, .class_first = 0, .class_count = 1 },
443 .{ .id = 2, .parent = 0, .class_first = 1, .class_count = 1 },
444 .{ .id = 3, .parent = 0, .class_first = 2, .class_count = 1 },
445 };
446 var classes = [_]u32{ 1, 2, 2 };
447 const view = tree.View{
448 .header = .{ .root_font_size = 16 },
449 .nodes = &nodes,
450 .classes = &classes,
451 .atoms = &atoms,
452 .strings = "rowcellotherextra",
453 };
454 var engine = try @import("generation.zig").Engine.init(allocator, .{
455 .nodes = 3,
456 .distinct_styles = 8,
457 .selectors = 4,
458 .bytes = 32 * 1024,
459 });
460 defer engine.deinit(allocator);
461 engine.activate();
462 _ = try engine.cascadeView(view, &.{}, &sheet, 1, .{});
463 classes[0] = 3;
464 const removed = try engine.cascadeView(view, &.{0}, &sheet, 1, .{});
465 try std.testing.expectEqual(@as(u32, 3), removed.restyled);
466 classes[0] = 4;
467 const unrelated = try engine.cascadeView(view, &.{0}, &sheet, 1, .{});
468 try std.testing.expectEqual(@as(u32, 1), unrelated.restyled);
469 classes[0] = 1;
470 const restored = try engine.cascadeView(view, &.{0}, &sheet, 1, .{});
471 try std.testing.expectEqual(@as(u32, 3), restored.restyled);
472 }
473
474 test "default semantic chrome parses without diagnostics" {
475 var threaded: std.Io.Threaded = .init(std.testing.allocator, .{});
476 defer threaded.deinit();
477 const io = threaded.io();
478 var source: ?[]u8 = null;
479 for ([_][]const u8{ "lib/ui/assets/css/default.css", "assets/css/default.css" }) |path| {
480 source = std.Io.Dir.cwd().readFileAlloc(io, path, std.testing.allocator, .limited(64 * 1024)) catch continue;
481 break;
482 }
483 const css_source = source orelse return error.DefaultCssMissing;
484 defer std.testing.allocator.free(css_source);
485 var workspace = css.Workspace.init(std.testing.allocator);
486 defer workspace.deinit();
487 const sheet = try workspace.parse(css_source, .default());
488 try std.testing.expectEqual(@as(usize, 0), sheet.diagnostics.len);
489 try std.testing.expect(sheet.rules.len >= 7);
490 const nodes = [_]abi.Node{
491 .{ .id = 1, .subtree_count = 1 },
492 .{ .id = 2, .parent = 0, .role = @backingInt(abi.Role.button), .state = abi.state(.selected) },
493 };
494 var engine = try @import("generation.zig").Engine.init(std.testing.allocator, .{
495 .nodes = 2,
496 .distinct_styles = 8,
497 .selectors = 64,
498 .bytes = 64 * 1024,
499 });
500 defer engine.deinit(std.testing.allocator);
501 engine.activate();
502 _ = try engine.cascadeView(.{ .nodes = &nodes }, &.{}, &sheet, 1, .{ .focused = 2, .keyboard_focus = true });
503 const button = engine.record(1);
504 try std.testing.expect(button.paint.background.a != 0);
505 try std.testing.expectEqual(@as(f32, 4), button.paint.radius[0]);
506 try std.testing.expectEqual(@as(f32, 4), button.paint.outset);
507 }
508
509 test "stylesheet generation selects bucket keys and agrees with a cold cascade" {
510 const allocator = std.testing.allocator;
511 var first_workspace = css.Workspace.init(allocator);
512 defer first_workspace.deinit();
513 var second_workspace = css.Workspace.init(allocator);
514 defer second_workspace.deinit();
515 const first = try first_workspace.parse(".alpha { color: red; }", .default());
516 const second = try second_workspace.parse(".beta { color: blue; }", .default());
517 const nodes = [_]abi.Node{
518 .{ .id = 1, .subtree_count = 3 },
519 .{ .id = 2, .parent = 0, .class_first = 0, .class_count = 1 },
520 .{ .id = 3, .parent = 0, .class_first = 1, .class_count = 1 },
521 .{ .id = 4, .parent = 0, .class_first = 2, .class_count = 1 },
522 };
523 const atoms = [_]abi.Atom{ .{}, .{ .offset = 0, .len = 5 }, .{ .offset = 5, .len = 4 }, .{ .offset = 9, .len = 5 } };
524 const classes = [_]u32{ 1, 2, 3 };
525 const view = tree.View{ .nodes = &nodes, .classes = &classes, .atoms = &atoms, .strings = "alphabetagamma" };
526 const limits = @import("generation.zig").Limits{ .nodes = 4, .distinct_styles = 8, .selectors = 4, .bytes = 32 * 1024 };
527 var incremental = try @import("generation.zig").Engine.init(allocator, limits);
528 defer incremental.deinit(allocator);
529 incremental.activate();
530 _ = try incremental.cascadeView(view, &.{}, &first, 1, .{});
531 const changed = try incremental.cascadeView(view, &.{}, &second, 2, .{});
532 try std.testing.expectEqual(@as(u32, 2), changed.restyled);
533 var cold = try @import("generation.zig").Engine.init(allocator, limits);
534 defer cold.deinit(allocator);
535 cold.activate();
536 _ = try cold.cascadeView(view, &.{}, &second, 2, .{});
537 for (nodes, 0..) |_, at| try std.testing.expect(std.meta.eql(incremental.record(@intCast(at)).*, cold.record(@intCast(at)).*));
538 }
539
540 test "focus visible begins with keyboard focus and clears for pointer focus" {
541 const allocator = std.testing.allocator;
542 var workspace = css.Workspace.init(allocator);
543 defer workspace.deinit();
544 const sheet = try workspace.parse(":focus-visible { color: #ff0000; }", .default());
545 const nodes = [_]abi.Node{ .{ .id = 1, .subtree_count = 1 }, .{ .id = 2, .parent = 0 } };
546 const view = tree.View{ .nodes = &nodes };
547 var engine = try @import("generation.zig").Engine.init(allocator, .{ .nodes = 2, .distinct_styles = 4, .selectors = 2, .bytes = 16 * 1024 });
548 defer engine.deinit(allocator);
549 engine.activate();
550 _ = try engine.cascadeView(view, &.{}, &sheet, 1, .{ .focused = 2 });
551 const pointer = engine.record(1).paint.foreground;
552 const keyboard = try engine.cascadeView(view, &.{}, &sheet, 1, .{ .focused = 2, .keyboard_focus = true });
553 try std.testing.expect(keyboard.restyled > 0);
554 try std.testing.expect(!std.meta.eql(pointer, engine.record(1).paint.foreground));
555 const steady = try engine.cascadeView(view, &.{}, &sheet, 1, .{ .focused = 2, .keyboard_focus = true });
556 try std.testing.expectEqual(@as(u32, 0), steady.restyled);
557 _ = try engine.cascadeView(view, &.{}, &sheet, 1, .{ .focused = 2 });
558 try std.testing.expect(std.meta.eql(pointer, engine.record(1).paint.foreground));
559 }
560
561 test "focus from parent to child clears the parent direct focus" {
562 const allocator = std.testing.allocator;
563 var workspace = css.Workspace.init(allocator);
564 defer workspace.deinit();
565 const sheet = try workspace.parse(":focus { color: red; } :focus-visible { background: blue; } :focus-within { border-color: green; }", .default());
566 const nodes = [_]abi.Node{ .{ .id = 1, .subtree_count = 1 }, .{ .id = 2, .parent = 0 } };
567 const view = tree.View{ .nodes = &nodes };
568 const limits = @import("generation.zig").Limits{ .nodes = 2, .distinct_styles = 8, .selectors = 4, .bytes = 64 * 1024 };
569 var incremental = try @import("generation.zig").Engine.init(allocator, limits);
570 defer incremental.deinit(allocator);
571 incremental.activate();
572 _ = try incremental.cascadeView(view, &.{}, &sheet, 1, .{ .focused = 1, .keyboard_focus = true });
573 const changed = try incremental.cascadeView(view, &.{}, &sheet, 1, .{ .focused = 2 });
574 try std.testing.expectEqual(@as(u32, 2), changed.visited);
575 var cold = try @import("generation.zig").Engine.init(allocator, limits);
576 defer cold.deinit(allocator);
577 cold.activate();
578 _ = try cold.cascadeView(view, &.{}, &sheet, 1, .{ .focused = 2 });
579 for (nodes, 0..) |_, at| try std.testing.expect(std.meta.eql(incremental.record(@intCast(at)).*, cold.record(@intCast(at)).*));
580 }
581
582 test "hover invalidation covers ancestor kind selectors" {
583 const allocator = std.testing.allocator;
584 var workspace = css.Workspace.init(allocator);
585 defer workspace.deinit();
586 const sheet = try workspace.parse("box:hover text { color: #ff0000; }", .default());
587 const nodes = [_]abi.Node{
588 .{ .id = 1, .kind = @backingInt(abi.Kind.box), .subtree_count = 1 },
589 .{ .id = 2, .kind = @backingInt(abi.Kind.text), .parent = 0 },
590 };
591 const view = tree.View{ .nodes = &nodes };
592 var engine = try @import("generation.zig").Engine.init(allocator, .{ .nodes = 2, .distinct_styles = 4, .selectors = 2, .bytes = 16 * 1024 });
593 defer engine.deinit(allocator);
594 engine.activate();
595 _ = try engine.cascadeView(view, &.{}, &sheet, 1, .{});
596 const before = engine.record(1).paint.foreground;
597 const entered = try engine.cascadeView(view, &.{}, &sheet, 1, .{ .hovered = 2 });
598 try std.testing.expectEqual(@as(u32, 2), entered.restyled);
599 try std.testing.expect(!std.meta.eql(before, engine.record(1).paint.foreground));
600 const left = try engine.cascadeView(view, &.{}, &sheet, 1, .{});
601 try std.testing.expectEqual(@as(u32, 2), left.restyled);
602 try std.testing.expect(std.meta.eql(before, engine.record(1).paint.foreground));
603 }
604
605 test "stylesheet change refreshes hover sensitivity of copied ancestors" {
606 const allocator = std.testing.allocator;
607 var first_workspace = css.Workspace.init(allocator);
608 defer first_workspace.deinit();
609 var second_workspace = css.Workspace.init(allocator);
610 defer second_workspace.deinit();
611 const first = try first_workspace.parse(".beta { color: #0000ff; }", .default());
612 const second = try second_workspace.parse(".alpha:hover .beta { color: #ff0000; }", .default());
613 const nodes = [_]abi.Node{
614 .{ .id = 1, .subtree_count = 1, .class_first = 0, .class_count = 1 },
615 .{ .id = 2, .parent = 0, .class_first = 1, .class_count = 1 },
616 };
617 const atoms = [_]abi.Atom{ .{}, .{ .offset = 0, .len = 5 }, .{ .offset = 5, .len = 4 } };
618 const classes = [_]u32{ 1, 2 };
619 const view = tree.View{ .nodes = &nodes, .classes = &classes, .atoms = &atoms, .strings = "alphabeta" };
620 var engine = try @import("generation.zig").Engine.init(allocator, .{ .nodes = 2, .distinct_styles = 4, .selectors = 2, .bytes = 16 * 1024 });
621 defer engine.deinit(allocator);
622 engine.activate();
623 _ = try engine.cascadeView(view, &.{}, &first, 1, .{});
624 _ = try engine.cascadeView(view, &.{}, &second, 2, .{});
625 const before = engine.record(1).paint.foreground;
626 const entered = try engine.cascadeView(view, &.{}, &second, 2, .{ .hovered = 2 });
627 try std.testing.expectEqual(@as(u32, 2), entered.restyled);
628 try std.testing.expect(!std.meta.eql(before, engine.record(1).paint.foreground));
629 }
630
631 test "inherited variables distinguish children of otherwise shared parents" {
632 const allocator = std.testing.allocator;
633 var workspace = css.Workspace.init(allocator);
634 defer workspace.deinit();
635 const sheet = try workspace.parse(
636 ".red { --ink: #ff0000; } .blue { --ink: #0000ff; } .child { color: var(--ink); }",
637 .default(),
638 );
639 try std.testing.expectEqual(@as(usize, 0), sheet.diagnostics.len);
640 const nodes = [_]abi.Node{
641 .{ .id = 1, .subtree_count = 4 },
642 .{ .id = 2, .parent = 0, .subtree_count = 1, .class_first = 0, .class_count = 1 },
643 .{ .id = 3, .parent = 1, .class_first = 1, .class_count = 1 },
644 .{ .id = 4, .parent = 0, .subtree_count = 1, .class_first = 2, .class_count = 1 },
645 .{ .id = 5, .parent = 3, .class_first = 3, .class_count = 1 },
646 };
647 const atoms = [_]abi.Atom{ .{}, .{ .offset = 0, .len = 3 }, .{ .offset = 3, .len = 5 }, .{ .offset = 8, .len = 4 } };
648 var classes = [_]u32{ 1, 2, 3, 2 };
649 const view = tree.View{ .nodes = &nodes, .classes = &classes, .atoms = &atoms, .strings = "redchildblue" };
650 var engine = try @import("generation.zig").Engine.init(allocator, .{ .nodes = 5, .distinct_styles = 8, .selectors = 8, .bytes = 32 * 1024 });
651 defer engine.deinit(allocator);
652 engine.activate();
653 _ = try engine.cascadeView(view, &.{}, &sheet, 1, .{});
654 try std.testing.expect(engine.record(1) == engine.record(3));
655 try std.testing.expect(engine.record(2) != engine.record(4));
656 const before = engine.record(2).paint.foreground;
657 classes[0] = 3;
658 const changed = try engine.cascadeView(view, &.{1}, &sheet, 1, .{});
659 try std.testing.expectEqual(@as(u32, 5), changed.restyled);
660 try std.testing.expect(!std.meta.eql(before, engine.record(2).paint.foreground));
661 try std.testing.expect(std.meta.eql(engine.record(2).paint.foreground, engine.record(4).paint.foreground));
662 }