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css: add pseudo class relative match

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This commit is contained in:
Pierre Tachoire
2024-03-19 09:25:52 +01:00
parent 75e80a47e6
commit 9c997ec86d
2 changed files with 82 additions and 0 deletions
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50
src/css/match_test.zig
View File

@@ -176,6 +176,31 @@ test "matchFirst" {
} } } },
.exp = 1,
},
.{
.q = ":not(p)",
.n = .{ .child = &.{ .name = "p", .child = &.{ .name = "a" }, .sibling = &.{ .name = "strong" } } },
.exp = 1,
},
.{
.q = "p:has(a)",
.n = .{ .child = &.{ .name = "p", .child = &.{ .name = "a" }, .sibling = &.{ .name = "strong" } } },
.exp = 1,
},
.{
.q = "p:has(strong)",
.n = .{ .child = &.{ .name = "p", .child = &.{ .name = "a" }, .sibling = &.{ .name = "strong" } } },
.exp = 0,
},
.{
.q = "p:haschild(a)",
.n = .{ .child = &.{ .name = "p", .child = &.{ .name = "a" }, .sibling = &.{ .name = "strong" } } },
.exp = 1,
},
.{
.q = "p:haschild(strong)",
.n = .{ .child = &.{ .name = "p", .child = &.{ .name = "a" }, .sibling = &.{ .name = "strong" } } },
.exp = 0,
},
};
for (testcases) |tc| {
@@ -315,6 +340,31 @@ test "matchAll" {
} } } },
.exp = 1,
},
.{
.q = ":not(p)",
.n = .{ .child = &.{ .name = "p", .child = &.{ .name = "a" }, .sibling = &.{ .name = "strong" } } },
.exp = 2,
},
.{
.q = "p:has(a)",
.n = .{ .child = &.{ .name = "p", .child = &.{ .name = "a" }, .sibling = &.{ .name = "strong" } } },
.exp = 1,
},
.{
.q = "p:has(strong)",
.n = .{ .child = &.{ .name = "p", .child = &.{ .name = "a" }, .sibling = &.{ .name = "strong" } } },
.exp = 0,
},
.{
.q = "p:haschild(a)",
.n = .{ .child = &.{ .name = "p", .child = &.{ .name = "a" }, .sibling = &.{ .name = "strong" } } },
.exp = 1,
},
.{
.q = "p:haschild(strong)",
.n = .{ .child = &.{ .name = "p", .child = &.{ .name = "a" }, .sibling = &.{ .name = "strong" } } },
.exp = 0,
},
};
for (testcases) |tc| {

32
src/css/selector.zig
View File

@@ -143,6 +143,7 @@ pub const PseudoClass = enum {
pub const Selector = union(enum) {
pub const Error = error{
UnknownCombinedCombinator,
UnsupportedRelativePseudoClass,
};
compound: struct {
@@ -289,10 +290,41 @@ pub const Selector = union(enum) {
};
},
.never_match => return false,
.pseudo_class_relative => |v| {
if (!n.isElement()) return false;
return switch (v.pseudo_class) {
.not => !try v.match.match(n),
.has => try hasDescendantMatch(v.match, n),
.haschild => try hasChildMatch(v.match, n),
else => Error.UnsupportedRelativePseudoClass,
};
},
else => false,
};
}
fn hasDescendantMatch(s: *const Selector, n: anytype) anyerror!bool {
var c = try n.firstChild();
while (c != null) {
if (try s.match(c.?)) return true;
if (c.?.isElement() and try hasDescendantMatch(s, c.?)) return true;
c = try c.?.nextSibling();
}
return false;
}
fn hasChildMatch(s: *const Selector, n: anytype) anyerror!bool {
var c = try n.firstChild();
while (c != null) {
if (try s.match(c.?)) return true;
c = try c.?.nextSibling();
}
return false;
}
pub fn deinit(sel: Selector, alloc: std.mem.Allocator) void {
switch (sel) {
.group => |v| {