mirror of https://github.com/bsnes-emu/bsnes.git
270 lines
8.9 KiB
C++
270 lines
8.9 KiB
C++
#pragma once
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/* Document Markup Language (DML) v1.0 parser
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* revision 0.04
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*/
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#include <nall/location.hpp>
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namespace nall { namespace {
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struct DML {
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auto& setAllowHTML(bool allowHTML) { settings.allowHTML = allowHTML; return *this; }
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auto& setHost(const string& hostname) { settings.host = {hostname, "/"}; return *this; }
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auto& setPath(const string& pathname) { settings.path = pathname; return *this; }
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auto& setReader(const function<string (string)>& reader) { settings.reader = reader; return *this; }
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auto& setSectioned(bool sectioned) { settings.sectioned = sectioned; return *this; }
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auto parse(const string& filedata, const string& pathname) -> string;
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auto parse(const string& filename) -> string;
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private:
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struct Settings {
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bool allowHTML = true;
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string host = "localhost/";
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string path;
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function<string (string)> reader;
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bool sectioned = true;
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} settings;
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struct State {
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string output;
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uint sections = 0;
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} state;
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auto parseDocument(const string& filedata, const string& pathname, uint depth) -> bool;
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auto parseBlock(string& block, const string& pathname, uint depth) -> bool;
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auto count(const string& text, char value) -> uint;
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auto escape(const string& text) -> string;
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auto markup(const string& text) -> string;
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};
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auto DML::parse(const string& filedata, const string& pathname) -> string {
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settings.path = pathname;
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parseDocument(filedata, settings.path, 0);
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return state.output;
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}
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auto DML::parse(const string& filename) -> string {
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if(!settings.path) settings.path = Location::path(filename);
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string document = settings.reader ? settings.reader(filename) : string::read(filename);
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parseDocument(document, settings.path, 0);
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return state.output;
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}
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auto DML::parseDocument(const string& filedata, const string& pathname, uint depth) -> bool {
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if(depth >= 100) return false; //attempt to prevent infinite recursion with reasonable limit
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auto blocks = filedata.split("\n\n");
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for(auto& block : blocks) parseBlock(block, pathname, depth);
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if(settings.sectioned && state.sections && depth == 0) state.output.append("</section>\n");
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return true;
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}
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auto DML::parseBlock(string& block, const string& pathname, uint depth) -> bool {
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if(!block.stripRight()) return true;
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auto lines = block.split("\n");
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//include
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if(block.beginsWith("<include ") && block.endsWith(">")) {
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string filename{pathname, block.trim("<include ", ">", 1L).strip()};
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string document = settings.reader ? settings.reader(filename) : string::read(filename);
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parseDocument(document, Location::path(filename), depth + 1);
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}
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//html
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else if(block.beginsWith("<html>\n") && settings.allowHTML) {
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for(auto n : range(lines.size())) {
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if(n == 0 || !lines[n].beginsWith(" ")) continue;
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state.output.append(lines[n].trimLeft(" ", 1L), "\n");
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}
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}
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//section
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else if(block.beginsWith("# ")) {
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if(settings.sectioned) {
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if(state.sections++) state.output.append("</section>");
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state.output.append("<section>");
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}
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auto content = lines.takeLeft().trimLeft("# ", 1L).split("::", 1L).strip();
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auto data = markup(content[0]);
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auto name = escape(content(1, data.hash()));
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state.output.append("<header id=\"", name, "\">", data);
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for(auto& line : lines) {
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if(!line.beginsWith("# ")) continue;
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state.output.append("<span>", line.trimLeft("# ", 1L), "</span>");
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}
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state.output.append("</header>\n");
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}
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//header
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else if(auto depth = count(block, '=')) {
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auto content = slice(lines.takeLeft(), depth + 1).split("::", 1L).strip();
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auto data = markup(content[0]);
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auto name = escape(content(1, data.hash()));
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if(depth <= 6) {
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state.output.append("<h", depth, " id=\"", name, "\">", data);
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for(auto& line : lines) {
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if(count(line, '=') != depth) continue;
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state.output.append("<span>", slice(line, depth + 1), "</span>");
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}
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state.output.append("</h", depth, ">\n");
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}
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}
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//navigation
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else if(count(block, '-')) {
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state.output.append("<nav>\n");
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uint level = 0;
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for(auto& line : lines) {
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if(auto depth = count(line, '-')) {
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while(level < depth) level++, state.output.append("<ul>\n");
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while(level > depth) level--, state.output.append("</ul>\n");
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auto content = slice(line, depth + 1).split("::", 1L).strip();
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auto data = markup(content[0]);
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auto name = escape(content(1, data.hash()));
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state.output.append("<li><a href=\"#", name, "\">", data, "</a></li>\n");
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}
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}
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while(level--) state.output.append("</ul>\n");
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state.output.append("</nav>\n");
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}
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//list
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else if(count(block, '*')) {
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uint level = 0;
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for(auto& line : lines) {
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if(auto depth = count(line, '*')) {
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while(level < depth) level++, state.output.append("<ul>\n");
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while(level > depth) level--, state.output.append("</ul>\n");
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auto data = markup(slice(line, depth + 1));
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state.output.append("<li>", data, "</li>\n");
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}
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}
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while(level--) state.output.append("</ul>\n");
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}
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//quote
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else if(count(block, '>')) {
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uint level = 0;
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for(auto& line : lines) {
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if(auto depth = count(line, '>')) {
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while(level < depth) level++, state.output.append("<blockquote>\n");
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while(level > depth) level--, state.output.append("</blockquote>\n");
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auto data = markup(slice(line, depth + 1));
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state.output.append(data, "\n");
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}
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}
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while(level--) state.output.append("</blockquote>\n");
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}
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//code
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else if(block.beginsWith(" ")) {
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state.output.append("<pre>");
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for(auto& line : lines) {
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if(!line.beginsWith(" ")) continue;
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state.output.append(escape(line.trimLeft(" ", 1L)), "\n");
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}
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state.output.trimRight("\n", 1L).append("</pre>\n");
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}
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//divider
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else if(block.equals("---")) {
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state.output.append("<hr>\n");
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}
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//paragraph
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else {
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state.output.append("<p>", markup(block), "</p>\n");
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}
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return true;
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}
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auto DML::count(const string& text, char value) -> uint {
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for(uint n = 0; n < text.size(); n++) {
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if(text[n] != value) {
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if(text[n] == ' ') return n;
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break;
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}
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}
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return 0;
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}
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auto DML::escape(const string& text) -> string {
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string output;
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for(auto c : text) {
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if(c == '&') { output.append("&"); continue; }
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if(c == '<') { output.append("<"); continue; }
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if(c == '>') { output.append(">"); continue; }
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if(c == '"') { output.append("""); continue; }
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output.append(c);
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}
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return output;
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}
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auto DML::markup(const string& s) -> string {
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string t;
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boolean strong;
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boolean emphasis;
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boolean insertion;
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boolean deletion;
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boolean code;
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natural link, linkBase;
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natural embed, embedBase;
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for(uint n = 0; n < s.size();) {
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char a = s[n];
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char b = s[n + 1];
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if(!link && !embed) {
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if(a == '*' && b == '*') { t.append(strong.flip() ? "<strong>" : "</strong>"); n += 2; continue; }
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if(a == '/' && b == '/') { t.append(emphasis.flip() ? "<em>" : "</em>"); n += 2; continue; }
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if(a == '_' && b == '_') { t.append(insertion.flip() ? "<ins>" : "</ins>"); n += 2; continue; }
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if(a == '~' && b == '~') { t.append(deletion.flip() ? "<del>" : "</del>"); n += 2; continue; }
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if(a == '|' && b == '|') { t.append(code.flip() ? "<code>" : "</code>"); n += 2; continue; }
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if(a =='\\' && b =='\\') { t.append("<br>"); n += 2; continue; }
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}
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if(!embed) {
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if(link == 0 && a == '[' && b == '[') { t.append("<a href=\""); link = 1; linkBase = n += 2; continue; }
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if(link == 1 && a == ':' && b == ':') { t.append("\">"); link = 2; n += 2; continue; }
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if(link == 1 && a == ']' && b == ']') { t.append("\">", slice(s, linkBase, n - linkBase), "</a>"); n += 2; link = 0; continue; }
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if(link == 2 && a == ']' && b == ']') { t.append("</a>"); n += 2; link = 0; continue; }
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if(link == 1 && a == '@' && b == '/') { t.append(settings.host); n += 2; continue; }
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}
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if(!link) {
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if(embed == 0 && a == '{' && b == '{') { t.append("<img src=\""); embed = 1; embedBase = n += 2; continue; }
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if(embed == 1 && a == ':' && b == ':') { t.append("\" alt=\""); embed = 2; n += 2; continue; }
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if(embed != 0 && a == '}' && b == '}') { t.append("\">"); embed = 0; n += 2; continue; }
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if(embed == 1 && a == '@' && b == '/') { t.append(settings.host); n += 2; continue; }
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}
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if(a =='\\') { t.append(b); n += 2; continue; }
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if(a == '&') { t.append("&"); n++; continue; }
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if(a == '<') { t.append("<"); n++; continue; }
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if(a == '>') { t.append(">"); n++; continue; }
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if(a == '"') { t.append("""); n++; continue; }
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t.append(a);
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n++;
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}
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if(strong) t.append("</strong>");
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if(emphasis) t.append("</em>");
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if(insertion) t.append("</ins>");
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if(deletion) t.append("</del>");
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if(code) t.append("</code>");
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if(link == 1) t.append("\">", slice(s, linkBase, s.size() - linkBase), "</a>");
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if(link == 2) t.append("</a>");
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if(embed != 0) t.append("\">");
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return t;
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}
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}}
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