1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
const std = @import("std");
const Allocator = std.mem.Allocator;
const eql = std.mem.eql;
pub const Kind = enum {
void,
content,
literal,
};
const Self = @This();
kind: Kind,
tag: ?[]const u8 = null,
attributes: std.StringArrayHashMap([]const u8),
class_list: std.BufSet,
content: ?[]*Self = null,
literal: ?[]const u8 = null,
pub fn init(alloc: Allocator, knd: Kind, tag: []const u8) Self {
return .{
.kind = knd,
.tag = tag,
.attributes = .init(alloc),
.class_list = .init(alloc),
};
}
pub fn initLit(alloc: Allocator, literal: []const u8) Self {
return .{ .kind = .literal, .literal = literal, .attributes = .init(alloc), .class_list = .init(alloc) };
}
pub fn deinit(self: *Self) void {
self.attributes.deinit();
self.class_list.deinit();
}
pub fn render(self: *Self, alloc: Allocator) !std.ArrayList(u8) {
var attr = try self.renderAttribute(alloc);
defer attr.deinit(alloc);
var acc = try std.ArrayList(u8).initCapacity(alloc, 2);
errdefer acc.deinit(alloc);
if (self.tag) |tag| {
try acc.append(alloc, '<');
try acc.appendSlice(alloc, tag);
try acc.appendSlice(alloc, attr.items);
try acc.append(alloc, '>');
}
switch (self.kind) {
.void => return acc,
.content => {
if (self.content) |content| {
for (content) |it| {
var sub = try it.render(alloc);
defer sub.deinit(alloc);
try acc.appendSlice(alloc, sub.items);
}
}
},
.literal => try acc.appendSlice(alloc, self.literal.?),
}
if (self.tag) |tag| {
try acc.appendSlice(alloc, "</");
try acc.appendSlice(alloc, tag);
try acc.append(alloc, '>');
}
return acc;
}
fn renderAttribute(self: *Self, alloc: Allocator) !std.ArrayList(u8) {
var iter = self.attributes.iterator();
if (iter.len == 0) return .empty;
var acc = try std.ArrayList(u8).initCapacity(alloc, 2);
errdefer acc.deinit(alloc);
try acc.append(alloc, ' ');
var i: usize = 0;
while (iter.next()) |it| : (i += 1) {
try acc.appendSlice(alloc, it.key_ptr.*);
try acc.appendSlice(alloc, "=\"");
// MISSING ESCAPING!!!
try acc.appendSlice(alloc, it.value_ptr.*);
try acc.append(alloc, '"');
if (i < iter.len - 1) try acc.append(alloc, ' ');
}
return acc;
}
pub fn setAttribute(self: *Self, k: []const u8, v: []const u8) !void {
try self.attributes.put(k, v);
}
pub fn removeAttribute(self: *Self, k: []const u8) void {
_ = self.attributes.orderedRemove(k);
}
pub fn hasAttribute(self: *Self, k: []const u8) bool {
return self.attributes.contains(k);
}
fn doTest(alloc: Allocator, el: *Self, exp: []const u8) !void {
var rendered = try el.render(alloc);
defer rendered.deinit(alloc);
std.testing.expect(eql(u8, rendered.items, exp)) catch |err| {
std.debug.print("{s}\n", .{rendered.items});
return err;
};
}
test "void element" {
var arena = std.heap.DebugAllocator(.{}).init;
defer _ = arena.deinit();
const alloc = arena.allocator();
var br = init(alloc, .void, "br");
defer br.deinit();
try doTest(alloc, &br, "<br>");
var img = init(alloc, .void, "img");
defer img.deinit();
try img.setAttribute("src", "foo");
try img.setAttribute("alt", "bar");
try doTest(alloc, &img, "<img src=\"foo\" alt=\"bar\">");
}
test "content element" {
var arena = std.heap.DebugAllocator(.{}).init;
defer _ = arena.deinit();
const alloc = arena.allocator();
var p = init(alloc, .content, "p");
defer p.deinit();
var content = initLit(alloc, "hello world");
defer content.deinit();
var in = [_]*Self{&content};
p.content = ∈
try doTest(alloc, &content, "hello world");
try doTest(alloc, &p, "<p>hello world</p>");
var div = init(alloc, .content, "div");
defer div.deinit();
try div.setAttribute("class", "foo-bar");
var in2 = [_]*Self{&p, &content};
div.content = &in2;
try doTest(alloc, &div, "<div class=\"foo-bar\"><p>hello world</p>hello world</div>");
}
|
