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Rename allocator to arena to make the intent more clear

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Use expectEqual where possible

deduplicate finalize and finishDeclaration
This commit is contained in:
Karl Seguin
2025-05-24 10:08:26 +08:00
parent bd0fa1487f
commit 6ce24b3443
1 changed files with 24 additions and 53 deletions
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77
src/browser/cssom/css_parser.zig
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@@ -17,6 +17,7 @@
// along with this program. If not, see <https://www.gnu.org/licenses/>.
const std = @import("std");
const Allocator = std.mem.Allocator;
const CSSConstants = struct {
const IMPORTANT = "!important";
@@ -62,9 +63,9 @@ pub const CSSParser = struct {
};
}
pub fn parseDeclarations(allocator: std.mem.Allocator, text: []const u8) ![]CSSDeclaration {
pub fn parseDeclarations(arena: Allocator, text: []const u8) ![]CSSDeclaration {
var parser = init();
var declarations = std.ArrayListUnmanaged(CSSDeclaration){};
var declarations: std.ArrayListUnmanaged(CSSDeclaration) = .empty;
while (parser.position < text.len) {
const c = text[parser.position];
@@ -121,7 +122,7 @@ pub const CSSParser = struct {
} else if (c == ')' and parser.paren_depth > 0) {
parser.paren_depth -= 1;
} else if (c == ';' and parser.paren_depth == 0) {
try parser.finishDeclaration(allocator, &declarations, text);
try parser.finishDeclaration(arena, &declarations, text);
parser.state = .seek_name;
}
},
@@ -163,12 +164,12 @@ pub const CSSParser = struct {
parser.position += 1;
}
try parser.finalize(allocator, &declarations, text);
try parser.finalize(arena, &declarations, text);
return declarations.items;
}
fn finishDeclaration(self: *CSSParser, allocator: std.mem.Allocator, declarations: *std.ArrayListUnmanaged(CSSDeclaration), text: []const u8) !void {
fn finishDeclaration(self: *CSSParser, arena: Allocator, declarations: *std.ArrayListUnmanaged(CSSDeclaration), text: []const u8) !void {
const name = std.mem.trim(u8, text[self.name_start..self.name_end], &std.ascii.whitespace);
if (name.len == 0) return;
@@ -180,51 +181,21 @@ pub const CSSParser = struct {
if (std.mem.endsWith(u8, value, CSSConstants.IMPORTANT)) {
is_important = true;
final_value = std.mem.trim(u8, value[0 .. value.len - CSSConstants.IMPORTANT.len], &std.ascii.whitespace);
final_value = std.mem.trimRight(u8, value[0 .. value.len - CSSConstants.IMPORTANT.len], &std.ascii.whitespace);
}
try declarations.append(allocator, .{
try declarations.append(arena, .{
.name = name,
.value = final_value,
.is_important = is_important,
});
}
fn finalize(self: *CSSParser, allocator: std.mem.Allocator, declarations: *std.ArrayListUnmanaged(CSSDeclaration), text: []const u8) !void {
if (self.state == .in_value) {
const name = text[self.name_start..self.name_end];
const trimmed_name = std.mem.trim(u8, name, &std.ascii.whitespace);
if (trimmed_name.len > 0) {
const raw_value = text[self.value_start..self.position];
const value = std.mem.trim(u8, raw_value, &std.ascii.whitespace);
var final_value = value;
var is_important = false;
if (std.mem.endsWith(u8, value, CSSConstants.IMPORTANT)) {
is_important = true;
final_value = std.mem.trim(u8, value[0 .. value.len - CSSConstants.IMPORTANT.len], &std.ascii.whitespace);
}
try declarations.append(allocator, .{
.name = trimmed_name,
.value = final_value,
.is_important = is_important,
});
}
fn finalize(self: *CSSParser, arena: Allocator, declarations: *std.ArrayListUnmanaged(CSSDeclaration), text: []const u8) !void {
if (self.state != .in_value) {
return;
}
}
pub fn getState(self: *const CSSParser) CSSParserState {
return self.state;
}
pub fn getPosition(self: *const CSSParser) usize {
return self.position;
}
pub fn reset(self: *CSSParser) void {
self.* = init();
return self.finishDeclaration(arena, declarations, text);
}
};
@@ -238,10 +209,10 @@ test "CSSParser - Simple property" {
const declarations = try CSSParser.parseDeclarations(allocator, text);
try testing.expect(declarations.len == 1);
try testing.expectEqual(1, declarations.len);
try testing.expectEqual("color", declarations[0].name);
try testing.expectEqual("red", declarations[0].value);
try testing.expect(!declarations[0].is_important);
try testing.expectEqual(false, declarations[0].is_important);
}
test "CSSParser - Property with !important" {
@@ -251,10 +222,10 @@ test "CSSParser - Property with !important" {
const declarations = try CSSParser.parseDeclarations(allocator, text);
try testing.expect(declarations.len == 1);
try testing.expectEqual(1, declarations.len);
try testing.expectEqual("margin", declarations[0].name);
try testing.expectEqual("10px", declarations[0].value);
try testing.expect(declarations[0].is_important);
try testing.expectEqual(true, declarations[0].is_important);
}
test "CSSParser - Multiple properties" {
@@ -268,15 +239,15 @@ test "CSSParser - Multiple properties" {
try testing.expectEqual("color", declarations[0].name);
try testing.expectEqual("red", declarations[0].value);
try testing.expect(!declarations[0].is_important);
try testing.expectEqual(false, declarations[0].is_important);
try testing.expectEqual("font-size", declarations[1].name);
try testing.expectEqual("12px", declarations[1].value);
try testing.expect(!declarations[1].is_important);
try testing.expectEqual(false, declarations[1].is_important);
try testing.expectEqual("margin", declarations[2].name);
try testing.expectEqual("5px", declarations[2].value);
try testing.expect(declarations[2].is_important);
try testing.expectEqual(true, declarations[2].is_important);
}
test "CSSParser - Quoted value with semicolon" {
@@ -286,10 +257,10 @@ test "CSSParser - Quoted value with semicolon" {
const declarations = try CSSParser.parseDeclarations(allocator, text);
try testing.expect(declarations.len == 1);
try testing.expectEqual(1, declarations.len);
try testing.expectEqual("content", declarations[0].name);
try testing.expectEqual("\"Hello; world!\"", declarations[0].value);
try testing.expect(!declarations[0].is_important);
try testing.expectEqual(false, declarations[0].is_important);
}
test "CSSParser - URL value" {
@@ -299,10 +270,10 @@ test "CSSParser - URL value" {
const declarations = try CSSParser.parseDeclarations(allocator, text);
try testing.expect(declarations.len == 1);
try testing.expectEqual(1, declarations.len);
try testing.expectEqual("background-image", declarations[0].name);
try testing.expectEqual("url(\"test.png\")", declarations[0].value);
try testing.expect(!declarations[0].is_important);
try testing.expectEqual(false, declarations[0].is_important);
}
test "CSSParser - Whitespace handling" {
@@ -312,7 +283,7 @@ test "CSSParser - Whitespace handling" {
const declarations = try CSSParser.parseDeclarations(allocator, text);
try testing.expect(declarations.len == 2);
try testing.expectEqual(2, declarations.len);
try testing.expectEqual("color", declarations[0].name);
try testing.expectEqual("purple", declarations[0].value);
try testing.expectEqual("margin", declarations[1].name);