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WebView.vala / FileManager.vala - Use YAML'd markdown files to good use
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Now, if there's YAML in the file, let's use its contents for what they
should be used for, and not be dumb about it.
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Lains committed Feb 13, 2021
1 parent ea92342 commit 2781f75
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Showing 2 changed files with 144 additions and 65 deletions.
113 changes: 113 additions & 0 deletions src/Services/FileManager.vala
View file
Original file line number Diff line number Diff line change
Expand Up @@ -122,4 +122,117 @@ namespace Quilter.Services.FileManager {
throw e;
}
}

public string get_yamlless_markdown (
string markdown,
int lines,
out string title,
out string date,
bool non_empty = true,
bool include_title = true,
bool include_date = true)
{
string buffer = markdown;
Regex headers = null;
try {
headers = new Regex ("^\\s*(.+)\\s*:\\s+(.*)", RegexCompileFlags.MULTILINE | RegexCompileFlags.CASELESS, 0);
} catch (Error e) {
warning ("Could not compile regex: %s", e.message);
}

string temp_title = "";
string temp_date = "";

MatchInfo matches;
var markout = new StringBuilder ();
int mklines = 0;

if (buffer.length > 4 && buffer[0:4] == "---\n") {
int i = 0;
int last_newline = 3;
int next_newline;
bool valid_frontmatter = true;
string line = "";

while (valid_frontmatter) {
next_newline = buffer.index_of_char('\n', last_newline + 1);
if (next_newline == -1 && !((buffer.length > last_newline + 1) && buffer.substring (last_newline + 1).has_prefix("---"))) {
valid_frontmatter = false;
break;
}

if (next_newline == -1) {
line = buffer.substring (last_newline + 1);
} else {
line = buffer[last_newline+1:next_newline];
}
last_newline = next_newline;

if (line == "---") {
break;
}

if (headers != null) {
if (headers.match (line, RegexMatchFlags.NOTEMPTY_ATSTART, out matches)) {
if (matches.fetch (1).ascii_down() == "title") {
temp_title = matches.fetch (2).chug ().chomp ();
if (temp_title.has_prefix ("\"") && temp_title.has_suffix ("\"")) {
temp_title = temp_title.substring (1, temp_title.length - 2);
}
if (include_title) {
markout.append ("# " + temp_title + "\n");
mklines++;
}
} else if (matches.fetch (1).ascii_down() == "date") {
temp_date = matches.fetch (2).chug ().chomp ();
if (include_date) {
markout.append ("## " + temp_date + "\n");
mklines++;
}
}
} else {
line = line.down ().chomp ();
if (!line.has_prefix ("-") && line != "") {
valid_frontmatter = false;
break;
}
}
} else {
string quick_parse = line.chomp ();
if (quick_parse.has_prefix ("title")) {
temp_title = quick_parse.substring (quick_parse.index_of (":") + 1);
if (temp_title.has_prefix ("\"") && temp_title.has_suffix ("\"")) {
temp_title = temp_title.substring (1, temp_title.length - 2);
}
if (include_title) {
markout.append ("# " + temp_title);
mklines++;
}
} else if (quick_parse.has_prefix ("date")) {
temp_date = quick_parse.substring (quick_parse.index_of (":") + 1).chug ().chomp ();
if (include_date) {
markout.append ("## " + temp_date);
mklines++;
}
}
}

i++;
}

if (!valid_frontmatter) {
markout.erase ();
markout.append (markdown);
} else {
markout.append (buffer[last_newline:buffer.length]);
}
} else {
markout.append (markdown);
}

title = temp_title;
date = temp_date;

return markout.str;
}
}
96 changes: 31 additions & 65 deletions src/Widgets/WebView.vala
View file
Original file line number Diff line number Diff line change
Expand Up @@ -210,78 +210,44 @@ namespace Quilter {
}
}

/**
* Process the frontmatter of a markdown document, if it exists.
* Returns the frontmatter data and strips the frontmatter from the markdown doc.
*
* @see http://jekyllrb.com/docs/frontmatter/
*/
private string[] process_frontmatter (string raw_mk, out string processed_mk) {
string[] map = {};

processed_mk = null;

if (raw_mk.length > 4 && raw_mk[0:4] == "---\n") {
int i = 0;
bool valid_frontmatter = true;
int last_newline = 3;
int next_newline;
string line = "";
while (true) {
next_newline = raw_mk.index_of_char('\n', last_newline + 1);
if (next_newline == -1) {
valid_frontmatter = false;
break;
}
line = raw_mk[last_newline+1:next_newline];
last_newline = next_newline;

if (line == "---") {
break;
}

var sep_index = line.index_of_char(':');
if (sep_index != -1) {
map += line[0:sep_index-1];
map += line[sep_index+1:line.length];
} else {
valid_frontmatter = false;
break;
}

i++;
}

if (valid_frontmatter) {
processed_mk = raw_mk[last_newline:raw_mk.length];
}
}

if (processed_mk == null) {
processed_mk = raw_mk;
}

return map;
}

public void update_html_view () {
string processed_mk;
process_frontmatter (buf.text, out processed_mk);
string title, date;
processed_mk = Services.FileManager.get_yamlless_markdown(
buf.text,
0, // Cap number of lines
out title,
out date,
true, // Include empty lines
true, // H1 title:
false // Include date
);

var mkd = new Markdown.Document.from_gfm_string (processed_mk.data,
Markdown.DocumentFlags.TOC +
Markdown.DocumentFlags.AUTOLINK + Markdown.DocumentFlags.EXTRA_FOOTNOTE +
Markdown.DocumentFlags.AUTOLINK + Markdown.DocumentFlags.DLEXTRA +
Markdown.DocumentFlags.FENCEDCODE + Markdown.DocumentFlags.GITHUBTAGS +
Markdown.DocumentFlags.LATEX + Markdown.DocumentFlags.URLENCODEDANCHOR +
Markdown.DocumentFlags.NOSTYLE + Markdown.DocumentFlags.EXPLICITLIST);
Markdown.DocumentFlags.AUTOLINK +
Markdown.DocumentFlags.EXTRA_FOOTNOTE +
Markdown.DocumentFlags.DLEXTRA +
Markdown.DocumentFlags.FENCEDCODE +
Markdown.DocumentFlags.GITHUBTAGS +
Markdown.DocumentFlags.LATEX +
Markdown.DocumentFlags.URLENCODEDANCHOR +
Markdown.DocumentFlags.NOSTYLE +
Markdown.DocumentFlags.EXPLICITLIST
);

mkd.compile (
Markdown.DocumentFlags.TOC + Markdown.DocumentFlags.AUTOLINK +
Markdown.DocumentFlags.TOC +
Markdown.DocumentFlags.AUTOLINK +
Markdown.DocumentFlags.EXTRA_FOOTNOTE +
Markdown.DocumentFlags.AUTOLINK + Markdown.DocumentFlags.DLEXTRA +
Markdown.DocumentFlags.FENCEDCODE + Markdown.DocumentFlags.GITHUBTAGS +
Markdown.DocumentFlags.LATEX + Markdown.DocumentFlags.URLENCODEDANCHOR +
Markdown.DocumentFlags.EXPLICITLIST + Markdown.DocumentFlags.NOSTYLE);
Markdown.DocumentFlags.DLEXTRA +
Markdown.DocumentFlags.FENCEDCODE +
Markdown.DocumentFlags.GITHUBTAGS +
Markdown.DocumentFlags.LATEX +
Markdown.DocumentFlags.URLENCODEDANCHOR +
Markdown.DocumentFlags.NOSTYLE +
Markdown.DocumentFlags.EXPLICITLIST
);

mkd.get_document (out processed_mk);
string highlight = set_highlight();
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