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886 lines (725 loc) · 25.2 KB
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#include <iostream>
#include <string>
#include <fstream>
using namespace std;
#define NOT_FOUND -1
/* _____ ____ _ _ ______ _____ _____
/ ____/ __ \| \ | | ____|_ _/ ____|
| | | | | | \| | |__ | || | __
| | | | | | . ` | __| | || | |_ |
| |___| |__| | |\ | | _| || |__| |
\_____\____/|_| \_|_| |_____\_____|*/
string config(const string &inputfn)
{
//==============================================================
//* title of your HTML document/blog post
//* (default: name of .md file)
const string TITLE = inputfn.substr(0, inputfn.length() - 3);
//==============================================================
//* path to the folder containing your images
//* (default: current folder)
const string PATH_TO_IMAGE_DIR = ".";
const string FAVICON = "favicon.ico";
//==============================================================
//* path to the folder containing your css
//* (default: current folder)
const string PATH_TO_STYLES_DIR = ".";
const string USR_STYLESHEET = "styles.css";
//==============================================================
//* enable if using highlight.js for syntax highlighting
const bool USING_HIGHLIGHT_JS = true;
//* path to folder with higlight.js paraphernalia
const string PATH_TO_HIGHLIGHT_JS = "./highlight";
//* one of the styles from highlight.js, in the styles/ dir
const string SYNTAX_HIGHLIGHT_STYLE = "pojoaque.css";
//==============================================================
// DON'T EDIT PAST THIS LINE :)
string header = "<!DOCTYPE html>\n";
header += "<html lang=\"en\">\n";
header += "<head>\n";
header += "\t<meta charset=\"utf-8\"/>\n";
header += "\t<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\"/>\n";
header += "\t<title>" + TITLE + "</title>\n";
header += "\t<link rel=\"stylesheet\" href=\"" + PATH_TO_STYLES_DIR + "/" + USR_STYLESHEET + "\">\n";
header += "\t<link rel=\"icon\" href=\"" + PATH_TO_IMAGE_DIR + "/" + FAVICON + "\">\n";
if(USING_HIGHLIGHT_JS)
{
header += "\t<link rel=\"stylesheet\" href=\"" + PATH_TO_HIGHLIGHT_JS + "/styles/" + SYNTAX_HIGHLIGHT_STYLE + "\">\n";
header += "\t<script src=\"" + PATH_TO_HIGHLIGHT_JS + "/highlight.pack.js\"></script>\n";
header += "\t<script>hljs.initHighlightingOnLoad();</script>\n";
}
header += "</head>\n\n<body>\n";
return header;
}
/*_____ _____ ____ _______ ____ _________ _______ ______ _____
| __ \| __ \ / __ \__ __/ __ \__ __\ \ / / __ \| ____|/ ____|
| |__) | |__) | | | | | | | | | | | | \ \_/ /| |__) | |__ | (___
| ___/| _ /| | | | | | | | | | | | \ / | ___/| __| \___ \
| | | | \ \| |__| | | | | |__| | | | | | | | | |____ ____) |
|_| |_| \_\\____/ |_| \____/ |_| |_| |_| |______|_____/ */
//main parsing function (calls others)
string parse(string md_line, ifstream &fin, int &consecutive_blank_lines, bool &unclosed_p_tag);
// === assorted parsing functions ===
void parse_emphases_to_html_driver(string &md_line);
void parse_emphases_to_html(string &md_line, const string &md_symbol,
const string &open_html_tag, const string &closed_html_tag);
void parse_images_to_html(string &md_line);
void parse_urls_to_html(string &md_line);
void parse_inline_code_to_html(string &md_line);
bool parse_blockquotes_to_html(string &md_line, bool inner_blockquote);
void parse_blockquotes_to_html(string &md_line, string &html_result, ifstream &fin);
bool parse_headings_to_html(const string &md_line, string &html_result);
bool parse_codeblock_to_html(string &md_line, string &html_result, ifstream &fin);
bool parse_list_to_html(string &md_line, string &html_result, ifstream &fin);
void parse_escaped_characters(string &md_line);
// === helpers ===
void handle_errors(int argc, char **argv);
bool is_ulist_character(const string& c);
bool is_olist_character(const string& c);
int count_indents(const string& md_line);
void append_tabs(string &html_result, int curr_list_level);
string remove_leading_whitespace(const string &md_line);
void close_open_p_tag(string &html_result, bool &unclosed_p_tag, int consecutive_blank_lines);
string replace(std::string subject, const std::string& search,
const std::string& replace);
void replace_in_place(std::string &subject, const std::string& search,
const std::string& replace);
/*__ __ _____ _ _
| \/ | /\ |_ _| \ | |
| \ / | / \ | | | \| |
| |\/| | / /\ \ | | | . ` |
| | | |/ ____ \ _| |_| |\ |
|_| |_/_/ \_\_____|_| \_|*/
int main(int argc, char **argv)
{
handle_errors(argc, argv);
string inputfn = argv[1];
string outputfn = argv[2];
const string HEADER = config(inputfn);
const string TAIL = "\n</body>\n</html>";
ifstream fin(inputfn);
if(fin.fail()) {std::cout << "Unable to read file.\n"; exit(1);}
ofstream fout(outputfn);
if(fout.fail()) {std::cout << "Unable to read file.\n"; exit(1);}
fout << HEADER << endl;
int consecutive_blank_lines = 0;
bool unclosed_p_tag = false; //tracks state, if current line is inside unclosed <p>
string html_line;
string md_line;
while(getline(fin, md_line))
{
html_line = parse(md_line, fin, consecutive_blank_lines, unclosed_p_tag);
fout << html_line;
if(consecutive_blank_lines >= 1 || !unclosed_p_tag)
fout << endl;
}
if(unclosed_p_tag)
fout << "\n</p>" << endl;
fout << TAIL;
}
/*_____ _____ _____ _____ _ _ _____
| __ \ /\ | __ \ / ____|_ _| \ | |/ ____|
| |__) / \ | |__) | (___ | | | \| | | __
| ___/ /\ \ | _ / \___ \ | | | . ` | | |_ |
| | / ____ \| | \ \ ____) |_| |_| |\ | |__| |
|_| /_/ \_\_| \_\_____/|_____|_| \_|\_____|*/
string parse(string md_line, ifstream &fin, int &consecutive_blank_lines, bool &unclosed_p_tag)
{
string html_result = "";
parse_escaped_characters(md_line);
//horizontal rule
if(md_line == "---")
{
//<hr> tags can't be within <p> tags, so close any open <p>
close_open_p_tag(html_result, unclosed_p_tag, consecutive_blank_lines);
return html_result + "<hr>";
}
//if the line only consists of <br> tags, don't wrap it in <p> tags
if(md_line.length() >= 4 && md_line.substr(0,4) == "<br>" &&
replace(md_line, "<br>", "") == "")
{
consecutive_blank_lines = 0;
return md_line;
}
bool is_codeblock = parse_codeblock_to_html(md_line, html_result, fin);
if(is_codeblock)
{
//<pre> tags can't be within <p> tags, so close any open <p>
close_open_p_tag(html_result, unclosed_p_tag, consecutive_blank_lines);
return html_result;
}
parse_inline_code_to_html(md_line);
parse_images_to_html(md_line);
if(consecutive_blank_lines == 0 && md_line.substr(0,4) == "<img")
{
//the img tag doesn't begin a new line, so add one
md_line = "\n<br>\n" + md_line;
}
parse_urls_to_html(md_line);
parse_emphases_to_html_driver(md_line); //bold, italics, and strikethrough
//headings, except where entire line is made up of #'s
//purposely placed at bottom cause headings can contain markdown
bool is_heading = parse_headings_to_html(md_line, html_result);
if(is_heading)
{
//prefer heading tags to be outside of <p> tags
close_open_p_tag(html_result, unclosed_p_tag, consecutive_blank_lines);
return html_result;
}
bool is_list = parse_list_to_html(md_line, html_result, fin);
if(is_list)
{
//lists aren't phrasing content, close p tag
close_open_p_tag(html_result, unclosed_p_tag, consecutive_blank_lines);
return html_result;
}
//blockquotes (purposely at the bottom cause they can contain markdown)
bool is_blockquote = parse_blockquotes_to_html(md_line, false);
if(is_blockquote)
{
//<blockquote> tags can't be within <p> tags, so close any open <p>
close_open_p_tag(html_result, unclosed_p_tag, consecutive_blank_lines);
parse_blockquotes_to_html(md_line, html_result, fin);
return html_result;
}
//consider making this a helper function
if(md_line != "")
{
if(consecutive_blank_lines >= 1)
{
//there's been a blank md line, so the content should have a new line
//this is achieved by either closing a <p> tag and starting a new one,
if(unclosed_p_tag)
html_result += "</p>\n\n<p>\n";
//or by simply opening a <p> tag if one isn't already open
else
{
html_result += "<p>\n";
unclosed_p_tag = true;
}
consecutive_blank_lines = 0;
}
else
{
//continue appending content to the page as usual
//"normal" text needs to be in some sort of tag, so place content in
//<p> tag if one isn't already open
if(!unclosed_p_tag)
{
html_result += "<p>\n";
unclosed_p_tag = true;
}
}
html_result += md_line;
}
else
consecutive_blank_lines++;
return html_result;
}
void parse_emphases_to_html_driver(string &md_line)
{
parse_emphases_to_html(md_line, "**", "<b>", "</b>");
parse_emphases_to_html(md_line, "__", "<b>", "</b>");
parse_emphases_to_html(md_line, "~~", "<s>", "</s>");
parse_emphases_to_html(md_line, "*", "<i>", "</i>");
parse_emphases_to_html(md_line, "_", "<i>", "</i>");
parse_emphases_to_html(md_line, "==", "<mark>", "</mark>");
parse_emphases_to_html(md_line, "++", "<ins>", "</ins>");
parse_emphases_to_html(md_line, "^", "<sup>", "</sup>");
parse_emphases_to_html(md_line, "~", "<sub>", "</sub>");
}
//parses markdown emphasis syntax into html, in place
void parse_emphases_to_html(string &md_line, const string &md_symbol,
const string &open_html_tag, const string &close_html_tag)
{
const int symbol_len = md_symbol.length();
int open_index;
int close_index;
bool line_begins_with_symbol = md_line.substr(0, symbol_len) == md_symbol;
//while we find ** in the string
while(line_begins_with_symbol
|| ((open_index = md_line.find(md_symbol)) && open_index != NOT_FOUND))
{
//there is a **
//special case where ** are first 2 chars
if(line_begins_with_symbol)
{
open_index = 0;
//we dont want to enter the loop for this again
line_begins_with_symbol = false;
}
//search for end in rest of the string (rest = indeces after start + 2)
close_index = md_line.find(md_symbol, open_index + symbol_len);
if(close_index != NOT_FOUND)
{
//there is a corresponding **
//replace both **'s with open and closed <b> tag
md_line.replace(close_index, symbol_len, close_html_tag);
md_line.replace(open_index, symbol_len, open_html_tag);
}
else
{
//there's no end to the suffering (i.e no closing **, so do nothing)
return;
}
}
}
//parses markdown image syntax into html, in place
void parse_images_to_html(string &md_line)
{
//syntax: 
//i've chosen to harcode strings and values as i think they're easier to read here
bool line_begins_with_symbol = md_line.substr(0, 2) == "![";
int open_bracket_index = 0;
while(line_begins_with_symbol ||
((open_bracket_index = md_line.find("![")) && open_bracket_index != NOT_FOUND))
{
//found an ![
//special case where ![ are first 2 chars
if(line_begins_with_symbol)
{
open_bracket_index = 0;
//we dont want to enter the loop for this again
line_begins_with_symbol = false;
}
//find first instance of ]( after [
int closed_bracket_index = md_line.find("](", open_bracket_index);
//find first instance of ) after ](
int closed_paren_index = md_line.find(")", closed_bracket_index);
if(closed_bracket_index != NOT_FOUND && closed_paren_index != NOT_FOUND)
{
//found ](
//replace ]( with \" src=\" (hence the 2, we're replacing 2 chars, "[(")
md_line.replace(closed_bracket_index, 2, "\" src=\"");
//replace ![ with <img alt=\" (hence the 2, we're replacing 2 chars, "[(")
md_line.replace(open_bracket_index, 2, "<img alt=\"");
//weird math making up for extra chars we just inserted (html tags longer than md tags)
//adjusted index = index - md length + html length
const string open_alt_symbol = "<img alt=\"";
closed_bracket_index = closed_bracket_index - 2 + open_alt_symbol.length();
//find ) following the ](
int closed_paren_index = md_line.find(")", closed_bracket_index);
//replace ) with \"> (hence the 1, we're replacing 1 char)
md_line.replace(closed_paren_index, 1, "\">");
//FOR OPTIONAL INLINE CSS TAG
int open_pipe_index = md_line.find("|", closed_paren_index);
if(open_pipe_index != NOT_FOUND)
{
//found a |
int closed_pipe_index = md_line.find("|", open_pipe_index + 1);
if(closed_pipe_index != NOT_FOUND)
{
//found a closing |
//get user specified styles
string styles = md_line.substr(open_pipe_index + 1,
closed_pipe_index - open_pipe_index - 1);
//remove styling metadata from content
md_line.erase(open_pipe_index, closed_pipe_index - open_pipe_index + 1);
//add styles to html
int alt = md_line.find("alt", open_bracket_index);
md_line.insert(alt, "style=\"" + styles + "\" ");
}
}
}
else return; //no bracket/paren, not a valid image
}
}
//parses markdown url syntax into html, in place
void parse_urls_to_html(string &md_line)
{
//syntax: [text](url)
//i've chosen to harcode strings and values as i think they're easier to read here
//most of the +1s and +2s are making up for index and length of symbols when getting text
//e.g. to get [mytext, the index points to [, so we add 1 to the substring to get mytext
bool line_begins_with_symbol = (md_line[0] == '[');
int open_bracket_index = 0;
while(line_begins_with_symbol ||
((open_bracket_index = md_line.find("[")) && open_bracket_index != NOT_FOUND))
{
//found an [
//special case where [ is first char
if(line_begins_with_symbol)
{
open_bracket_index = 0;
//we dont want to enter the loop for this again
line_begins_with_symbol = false;
}
//find first instance of ]( after [
int closed_bracket_index = md_line.find("](", open_bracket_index);
int closed_paren_index = md_line.find(")", closed_bracket_index);
if(closed_bracket_index != NOT_FOUND && closed_paren_index != NOT_FOUND)
{
//found ]( and )
//hyperlink text (i.e. [the stuff in here](example.com))
string text = md_line.substr(open_bracket_index + 1,
closed_bracket_index - open_bracket_index - 1);
string url = md_line.substr(closed_bracket_index + 2,
closed_paren_index - closed_bracket_index - 2);
//replace ]( with </a> (hence the 2, we're replacing 2 chars, "[(")
md_line.replace(closed_bracket_index, 2, "\">");
//replace [ with <a href=\" (hence the 1, we're replacing 1 char, "[")
md_line.replace(open_bracket_index, 1, "<a href=\"");
//weird math making up for extra chars we just inserted (html tags longer than md tags)
//adjusted index = index - md length + html length
const string open_a_symbol = "<a href=\"";
closed_bracket_index = closed_bracket_index - 2 + open_a_symbol.length();
//find ) following the ](
closed_paren_index = md_line.find(")", closed_bracket_index);
//replace ) with \"> (hence the 1, we're replacing 1 char)
md_line.replace(closed_paren_index, 1, "</a>");
//now swap text and url (cause the order is opposite in md and html)
int text_pos = md_line.find(text, open_bracket_index);
//replace text with random single char first,
//cause if url length < text length, operation will leave behind part of text
md_line.replace(text_pos, text.length(), "_");
md_line.replace(text_pos, 1, url);
//search for url after [stuff inside of brackets](
//currently inside of brackets is url, so open brace + 1 + url length --> after
int url_pos = md_line.find(url, open_bracket_index + 1 + url.length());
md_line.replace(url_pos, url.length(), "_");
md_line.replace(url_pos, 1, text);
}
else return; //no paren/bracket, it's not a valid url
}
}
void parse_inline_code_to_html(string &md_line)
{
//syntax: `this is all inline code`
//i've chosen to harcode strings and values as i think they're easier to read here
bool line_begins_with_symbol = (md_line[0] == '`');
int open_backtick_index = 0;
while(line_begins_with_symbol ||
((open_backtick_index = md_line.find("`")) && open_backtick_index != NOT_FOUND))
{
//found a `
//special case where ` is first char
if(line_begins_with_symbol)
{
open_backtick_index = 0;
//we dont want to enter the loop for this again
line_begins_with_symbol = false;
}
//find first instance of ` after `
int closed_backtick_index = md_line.find("`", open_backtick_index + 1);
if(closed_backtick_index != NOT_FOUND)
{
//remove any special characters from code blocks
for(int i = open_backtick_index + 1; i < closed_backtick_index; ++i)
{
if(md_line[i] == '<')
{
md_line.replace(i, 1, "<");
closed_backtick_index += 3; //difference in length of symbols
}
else if(md_line[i] == '>')
{
md_line.replace(i, 1, ">");
closed_backtick_index += 3; //difference in length of symbols
}
}
md_line.replace(closed_backtick_index, 1, "</code>");
md_line.replace(open_backtick_index, 1, "<code class=\"inline-code\">");
}
else return; //no closing backtick found
}
}
bool parse_headings_to_html(const string &md_line, string &html_result)
{
if(md_line[0] == '#' && replace(md_line, "#", "") != "")
{
int hash_count = 0;
int i = 0;
char c = md_line[0];
while(c == '#' && hash_count < 6) //6 because of <h6>
{
++hash_count;
++i;
c = md_line[i];
}
html_result += "<h" + to_string(hash_count) + ">" +
md_line.substr(i) + "</h" + to_string(hash_count) + ">";
return true;
}
else return false;
}
bool parse_codeblock_to_html(string &md_line, string &html_result, ifstream &fin)
{
if(md_line.substr(0,3) == "```")
{
string language = md_line.substr(3);
html_result += "<pre><code class=\"" + language + "\">";
while(getline(fin, md_line))
{
if(md_line == "```") //closing backticks
{
html_result += "</code></pre>";
return true;
}
else
{
replace_in_place(md_line, "&", "&");
replace_in_place(md_line, "<", "<");
replace_in_place(md_line, ">", ">");
html_result += md_line + "\n";
}
}
cout << "Missing a closing code block! (```)\n";
exit(1);
}
return false;
}
bool parse_list_to_html(string &md_line, string &html_result, ifstream &fin)
{
if(md_line.length() < 2) //all list syntax has at least 2 chars
return false;
string open_tag = "", closed_tag = "";
if(is_ulist_character(md_line.substr(0, 2)))
{
open_tag = "<ul>";
closed_tag = "</ul>";
}
else if(is_olist_character(md_line.substr(0, 2)))
{
open_tag = "<ol>";
closed_tag = "</ol>";
}
if(open_tag != "")
{
//this is a list
//begin list and append first bullet
html_result += open_tag + "\n";
string content = md_line.substr(2); //everything after "* "
html_result += "\t<li>" + content + "</li>\n";
int curr_list_level = 0; //change to curr_nest_level
int indents = 0;
streampos prev_line = fin.tellg();
//loop until md_line is no longer part of the list (doesn't start with "* " )
while(getline(fin, md_line))
{
string trimmed_md_line = remove_leading_whitespace(md_line);
bool is_list = false;
if(md_line.length() >= 2)
{
//different list types can be nested, must recheck for each line
if(is_ulist_character(trimmed_md_line.substr(0, 2)))
{
open_tag = "<ul>";
closed_tag = "</ul>";
is_list = true;
}
else if(is_olist_character(trimmed_md_line.substr(0, 2)))
{
open_tag = "<ol>";
closed_tag = "</ol>";
is_list = true;
}
}
if(is_list)
{
//line is still part of the list
prev_line = fin.tellg();
//create/close nested list depending on num indents in the line
indents = count_indents(md_line);
if(indents > curr_list_level)
{
append_tabs(html_result, curr_list_level + 1); //for html code indentation
html_result += open_tag + "\n";
curr_list_level++;
}
else if(indents < curr_list_level)
{
append_tabs(html_result, curr_list_level + 1); //for html code indentation
html_result += closed_tag + "\n";
curr_list_level--;
}
append_tabs(html_result, curr_list_level + 1); //for html code indentation
content = trimmed_md_line.substr(2); //cut off "* "
parse_inline_code_to_html(content);
parse_images_to_html(content);
parse_urls_to_html(content);
parse_emphases_to_html_driver(content);
html_result += "<li>" + content + "</li>\n";
}
else
{
fin.seekg(prev_line); //rewind file to parse this line again, not as a list
break;
}
}
//close all open list tags
for(int i = 0; i < curr_list_level + 1; ++i)
{
for(int j = curr_list_level - i; j > 0; --j) //for html code indentation
html_result += "\t";
html_result += closed_tag + "\n";
}
return true;
}
return false;
}
bool parse_blockquotes_to_html(string &md_line, bool inner_blockquote)
{
if(md_line[0] == '>' && md_line.length() > 1)
{
if(!inner_blockquote)
md_line = "<blockquote>" + md_line.substr(1);
else
md_line = md_line.substr(1);
return true;
}
else return false;
}
void parse_blockquotes_to_html(string &md_line, string &html_result, ifstream &fin)
{
html_result += md_line;
//consecutive >blockquotes should be in the same <blockquote> tag
//the following reads in any consecutive blockquotes into the tag
//save position of the line so we can rewind the file back once we read too far
streampos prev_line = fin.tellg();
bool is_blockquote = true;
while(getline(fin, md_line) && is_blockquote)
{
//blockquotes can contain markdown, so do the processing
parse_inline_code_to_html(md_line);
parse_images_to_html(md_line);
parse_urls_to_html(md_line);
parse_emphases_to_html_driver(md_line);
is_blockquote = parse_blockquotes_to_html(md_line, true);
if(!is_blockquote)
{
//no more blockquotes, rewind file back 1 line so it can be parsed next time
fin.seekg(prev_line);
}
else
{
//this is another blockquote, simply append content to open <blockquote> tag
prev_line = fin.tellg();
html_result += md_line;
}
}
html_result += "</blockquote>";
}
void parse_escaped_characters(string &md_line)
{
int escape_pos = md_line.find("\\");
while(escape_pos != NOT_FOUND && escape_pos != md_line.length() - 1)
{
switch(md_line[escape_pos + 1])
{
case '<': md_line.replace(escape_pos, 2, "<"); break;
case '&': md_line.replace(escape_pos, 2, "&"); break;
case '>': md_line.replace(escape_pos, 2, ">"); break;
case '*': md_line.replace(escape_pos, 2, "*"); break;
case '_': md_line.replace(escape_pos, 2, "_"); break;
case '`': md_line.replace(escape_pos, 2, "`"); break;
case '^': md_line.replace(escape_pos, 2, "^"); break;
case '~': md_line.replace(escape_pos, 2, "~"); break;
case '+': md_line.replace(escape_pos, 2, "+"); break;
case '=': md_line.replace(escape_pos, 2, "="); break;
case '!': md_line.replace(escape_pos, 2, "!"); break;
case '[': md_line.replace(escape_pos, 2, "["); break;
case '\\': md_line.replace(escape_pos, 2, "/"); break;
}
escape_pos = md_line.find("\\", escape_pos + 1);
}
}
/*_ _ ______ _ _____ ______ _____ _____
| | | | ____| | | __ \| ____| __ \ / ____|
| |__| | |__ | | | |__) | |__ | |__) | (___
| __ | __| | | | ___/| __| | _ / \___ \
| | | | |____| |____| | | |____| | \ \ ____) |
|_| |_|______|______|_| |______|_| \_\_____/ */
//thank you https://stackoverflow.com/a/14678800
string replace(std::string subject, const std::string& search, const std::string& replace)
{
if(search == "")
return "";
size_t pos = 0;
while ((pos = subject.find(search, pos)) != std::string::npos)
{
subject.replace(pos, search.length(), replace);
pos += replace.length();
}
return subject;
}
//thank you https://stackoverflow.com/a/14678800
void replace_in_place(std::string &subject, const std::string& search, const std::string& replace)
{
if(search == "")
return;
size_t pos = 0;
while ((pos = subject.find(search, pos)) != std::string::npos)
{
subject.replace(pos, search.length(), replace);
pos += replace.length();
}
}
bool is_ulist_character(const string& c)
{
return c[1] == ' ' && (c[0] == '*' || c[0] == '+' || c[0] == '-');
}
bool is_olist_character(const string& c)
{
return c[1] == '.' && (isdigit(c[0]));
}
int count_indents(const string& md_line)
{
int spaces = 0;
int tabs = 0;
bool found_non_space = false;
int i = 0;
while(!found_non_space)
{
if(md_line[i] == ' ') spaces++;
else if(md_line[i] == '\t') tabs++;
else found_non_space = true;
++i;
}
//let's say every 2 spaces == 1 indent
int indents = (spaces / 2) + tabs;
return indents;
}
string remove_leading_whitespace(const string &md_line)
{
int i = 0;
while(md_line[i] == ' ' || md_line[i] == '\t')
++i;
return md_line.substr(i);
}
void append_tabs(string &html_result, int curr_list_level)
{
for(int i = 0; i < curr_list_level; ++i)
{
html_result += "\t";
}
}
void close_open_p_tag(string &html_result, bool &unclosed_p_tag, int consecutive_blank_lines)
{
if(unclosed_p_tag)
{
html_result = "</p>\n\n" + html_result;
unclosed_p_tag = false;
}
consecutive_blank_lines = 0;
}
void handle_errors(int argc, char **argv)
{
if(argc != 3)
{
cout << "Usage: " << argv[0] << " input.md output.html\n";
exit(1);
}
int l;
string inputfn = argv[1];
if((l = inputfn.length()) && (l < 3 || inputfn.substr(l - 3) != ".md"))
{
std::cout << "Invalid input file type (must end in .md)\n";
exit(1);
}
string outputfn = argv[2];
if((l = outputfn.length()) && (l < 5 || outputfn.substr(l - 5) != ".html"))
{
std::cout << "Invalid output file type (must end in .html)\n";
exit(1);
}
}