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Serenity Operating System
1/*
2 * Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <AK/StringBuilder.h>
28#include <LibMarkdown/MDCodeBlock.h>
29#include <LibMarkdown/MDDocument.h>
30#include <LibMarkdown/MDHeading.h>
31#include <LibMarkdown/MDList.h>
32#include <LibMarkdown/MDParagraph.h>
33
34String MDDocument::render_to_html() const
35{
36 StringBuilder builder;
37
38 builder.append("<!DOCTYPE html>\n");
39 builder.append("<html>\n");
40 builder.append("<head></head>\n");
41 builder.append("<body>\n");
42
43 for (auto& block : m_blocks) {
44 auto s = block.render_to_html();
45 builder.append(s);
46 }
47
48 builder.append("</body>\n");
49 builder.append("</html>\n");
50 return builder.build();
51}
52
53String MDDocument::render_for_terminal() const
54{
55 StringBuilder builder;
56
57 for (auto& block : m_blocks) {
58 auto s = block.render_for_terminal();
59 builder.append(s);
60 }
61
62 return builder.build();
63}
64
65template<typename Block>
66static bool helper(Vector<StringView>::ConstIterator& lines, NonnullOwnPtrVector<MDBlock>& blocks)
67{
68 NonnullOwnPtr<Block> block = make<Block>();
69 bool success = block->parse(lines);
70 if (!success)
71 return false;
72 blocks.append(move(block));
73 return true;
74}
75
76bool MDDocument::parse(const StringView& str)
77{
78 const Vector<StringView> lines_vec = str.lines();
79 auto lines = lines_vec.begin();
80
81 while (true) {
82 if (lines.is_end())
83 return true;
84
85 if ((*lines).is_empty()) {
86 ++lines;
87 continue;
88 }
89
90 bool any = helper<MDList>(lines, m_blocks) || helper<MDParagraph>(lines, m_blocks) || helper<MDCodeBlock>(lines, m_blocks) || helper<MDHeading>(lines, m_blocks);
91
92 if (!any)
93 return false;
94 }
95}