parseTableHeaderDelimiterCell

fn parseTableHeaderDelimiterCell(content: []const u8) ?Node.TableCellAlignment

File

Code

fn parseTableHeaderDelimiterCell(content: []const u8) ?Node.TableCellAlignment {
    var state: enum {
        before_rule,
        after_left_anchor,
        in_rule,
        after_right_anchor,
        after_rule,
    } = .before_rule;
    var left_anchor = false;
    var right_anchor = false;
    for (content) |c| {
        switch (state) {
            .before_rule => switch (c) {
                ' ' => {},
                ':' => {
                    left_anchor = true;
                    state = .after_left_anchor;
                },
                '-' => state = .in_rule,
                else => return null,
            },
            .after_left_anchor => switch (c) {
                '-' => state = .in_rule,
                else => return null,
            },
            .in_rule => switch (c) {
                '-' => {},
                ':' => {
                    right_anchor = true;
                    state = .after_right_anchor;
                },
                ' ' => state = .after_rule,
                else => return null,
            },
            .after_right_anchor => switch (c) {
                ' ' => state = .after_rule,
                else => return null,
            },
            .after_rule => switch (c) {
                ' ' => {},
                else => return null,
            },
        }
    }

    switch (state) {
        .before_rule,
        .after_left_anchor,
        => return null,

        .in_rule,
        .after_right_anchor,
        .after_rule,
        => {},
    }

    return if (left_anchor and right_anchor)
        .center
    else if (left_anchor)
        .left
    else if (right_anchor)
        .right
    else
        .unset;
}