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
|
const std = @import("std");
const Allocator = std.mem.Allocator;
const Token = @import("lexer/Token.zig");
const Lexer = @import("lexer/Lexer.zig");
const Element = @import("eval/Element.zig");
const paragraph = @import("paragraph.zig");
const title = @import("title.zig");
const link = @import("link.zig");
pub const Error = error{
FeatureNotSupported,
} || Lexer.Error || paragraph.Error || title.Error || link.Error || Allocator.Error;
pub const Document = struct {
arena: std.heap.ArenaAllocator,
root: []Element,
pub fn renderHTML(self: @This(), alloc: Allocator) Element.HTML.Error![]const u8 {
var content = try std.ArrayList(u8).initCapacity(alloc, self.root.len * 6);
errdefer content.deinit(alloc);
for (self.root) |it| {
const v = try it.renderHTML(alloc);
defer alloc.free(v);
try content.appendSlice(alloc, v);
}
return content.toOwnedSlice(alloc);
}
pub fn deinit(self: @This()) void {
self.arena.deinit();
}
};
pub fn parseReader(parent: Allocator, r: *std.io.Reader) !Document {
var l = try Lexer.initReader(parent, r);
defer parent.free(l.iter.bytes);
return gen(parent, &l);
}
pub fn parse(parent: Allocator, content: []const u8) Error!Document {
var l = try Lexer.init(content);
return gen(parent, &l);
}
fn gen(parent: Allocator, l: *Lexer) Error!Document {
var arena = std.heap.ArenaAllocator.init(parent);
const alloc = arena.allocator();
errdefer arena.deinit();
var elements = try std.ArrayList(Element).initCapacity(alloc, 2);
base: while (l.peek()) |it| {
try elements.append(alloc, switch (it.kind) {
// block paragraph
.literal, .bold, .italic, .code, .link => try paragraph.parse(alloc, l),
// other blocks
.title => try title.parse(alloc, l),
.weak_delimiter, .strong_delimiter => {
l.consume();
continue :base;
},
else => return Error.FeatureNotSupported,
});
}
return .{ .root = try elements.toOwnedSlice(alloc), .arena = arena };
}
fn doTest(alloc: Allocator, t: []const u8, v: []const u8) !void {
const g = try parse(alloc, t);
defer g.deinit();
const res = try g.renderHTML(alloc);
defer alloc.free(res);
std.testing.expect(std.mem.eql(u8, res, v)) catch |err| {
std.debug.print("{s}\n", .{res});
return err;
};
}
test "parse multilines" {
const alloc = std.testing.allocator;
try doTest(alloc,
\\hello
\\world
\\
\\foo bar
\\in new paragraph
, "<p>hello world</p><p>foo bar in new paragraph</p>");
try doTest(alloc,
\\# title
\\hello world ;3
\\## subtitle
\\hehe
, "<h1>title</h1><p>hello world ;3</p><h2>subtitle</h2><p>hehe</p>");
}
test "multiple render doc" {
var arena = std.heap.ArenaAllocator.init(std.testing.allocator);
defer arena.deinit();
const alloc = arena.allocator();
const g = try parse(alloc, "hello *world*");
const a = try g.renderHTML(alloc);
const b = try g.renderHTML(alloc);
try std.testing.expect(std.mem.eql(u8, a, b));
}
|
