Markdown.cpp

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#include <tdme/tools/editor/misc/Markdown.h>
 
#include <string>
#include <vector>
 
#include <tdme/tdme.h>
#include <tdme/gui/GUIParser.h>
#include <tdme/os/filesystem/FileSystem.h>
#include <tdme/os/filesystem/FileSystemInterface.h>
#include <tdme/utilities/StringTools.h>
 
using std::string;
using std::to_string;
using std::vector;
 
using tdme::tools::editor::misc::Markdown;
 
using tdme::gui::GUIParser;
using tdme::os::filesystem::FileSystem;
using tdme::os::filesystem::FileSystemInterface;
using tdme::utilities::StringTools;
 
const string Markdown::createGUIXML(const string& pathName, const string& fileName, vector<TOCEntry>& toc) {
    vector<string> markdownLines;
    FileSystem::getInstance()->getContentAsStringArray(pathName, fileName, markdownLines);
    string xml;
    xml+= "<screen id='markdown' min-width='1024' min-height='768' max-width='3200' max-height='1800'>\n";
    xml+= "\t<scrollarea width='100%' height='100%'>\n";
    xml+= "\t\t<layout alignment='vertical' width='100%' height='auto'>\n";
    auto inTable = false;
    auto inTableIdx = 0;
    auto inCode = false;
    string inCodeString;
    int tocIdx = 1;
    auto tocLevel1 = 0;
    auto tocLevel2 = 0;
    auto tocLevel3 = 0;
    auto tocLevel4 = 0;
    for (auto markdownLine: markdownLines) {
        markdownLine = StringTools::replace(markdownLine, "&nbsp;", " ");
        //
        markdownLine = StringTools::replace(markdownLine, "\\<", "<");
        markdownLine = StringTools::replace(markdownLine, "\\>", ">");
        // TODO: support <sub> and </sub>
        markdownLine = StringTools::replace(markdownLine, "<sub>", "");
        markdownLine = StringTools::replace(markdownLine, "</sub>", "");
        // TODO: support <i> and </i>
        markdownLine = StringTools::replace(markdownLine, "<i>", "");
        markdownLine = StringTools::replace(markdownLine, "</i>", "");
        //
        auto markdownLineTrimmed = StringTools::trim(markdownLine);
        //
        if (inTable == true && StringTools::startsWith(markdownLine, "|") == false) {
            inTable = false;
            inTableIdx = 0;
            xml+= "</table>\n";
        }
        if (StringTools::startsWith(markdownLine, "```") == true) {
            if (inCode == false) {
                inCode = true;
            } else {
                xml+= "<space height='10'/>\n";
                xml+= "<styled-text font='{$font.default}' size='{$fontsize.default}' color='{$color.font_normal}' background-color='{$color.element_midground}' border-color='{$color.element_frame}' border='1' padding='5' width='*' height='auto' preformatted='true'>\n";
                xml+= " <![CDATA[\n";
                xml+= StringTools::replace(StringTools::replace(inCodeString, "[", "\\["), "]", "\\]");
                xml+= " ]]>\n";
                xml+= "</styled-text>\n";
                xml+= "<space height='10'/>\n";
                inCodeString.clear();
                inCode = false;
            }
        } else
        if (inCode == true) {
            inCodeString+= markdownLine + "\n";
        } else
        if (inTable == false && markdownLineTrimmed.empty() == true) {
            xml+= "<space height='20'/>\n";
        } else
        if (inTable == false && StringTools::startsWith(markdownLineTrimmed, "-") == true) {
            string textSize = "{$fontsize.default}";
            auto bulletPointIdx = StringTools::firstIndexOf(markdownLine, '-');
            auto bulletPoint = StringTools::trim(StringTools::substring(markdownLine, bulletPointIdx + 1));
            auto indent = bulletPointIdx / 2;
            xml+= "<layout alignment='horizontal' width='100%' height='auto'>\n";
            xml+= "\t<space width='" + to_string((bulletPointIdx + 1) * 10) + "'/>\n";
            xml+= "\t<styled-text font='{$font.default}' size='" + textSize + "' color='{$color.font_normal}' width='*' height='auto'>• " + GUIParser::escape(bulletPoint) + "</styled-text>\n";
            xml+= "</layout>\n";
        } else
        // image
        if (StringTools::startsWith(markdownLine, "!") == true) {
            string tooltip;
            {
                auto tooltipStartPosition = StringTools::indexOf(markdownLine, '[');
                auto tooltipEndPosition = StringTools::indexOf(markdownLine, ']');
                if (tooltipStartPosition != string::npos &&
                    tooltipEndPosition != string::npos &&
                    tooltipEndPosition > tooltipStartPosition) {
                    tooltip = StringTools::substring(markdownLine, tooltipStartPosition + 1, tooltipEndPosition);
                }
            }
            string source;
            {
                string url;
                auto urlStartPosition = StringTools::indexOf(markdownLine, '(');
                auto urlEndPosition = StringTools::indexOf(markdownLine, ')');
                if (urlStartPosition != string::npos &&
                    urlEndPosition != string::npos &&
                    urlEndPosition > urlStartPosition) {
                    url = StringTools::substring(markdownLine, urlStartPosition + 1, urlEndPosition);
                }
                if (StringTools::startsWith(url, "https://raw.githubusercontent.com/andreasdr/tdme2/master/") == true) {
                    source = StringTools::substring(url, string("https://raw.githubusercontent.com/andreasdr/tdme2/master/").size());
                }
            }
            //
            if (source.empty() == false) {
                xml+= "<image src='" + GUIParser::escape(FileSystem::getInstance()->getCurrentWorkingPathName() + "/" + source) + "' tooltip='" + GUIParser::escape(tooltip) + "' />\n";
            }
        } else
        if (StringTools::startsWith(markdownLine, "|") == true) {
            if (inTable == false) {
                inTable = true;
                xml+= "<table width='auto' height='auto'>\n";
            }
            markdownLine = StringTools::trim(markdownLine);
            vector<string> tableColumnStrings = { "" };
            auto separator = true;
            for (auto i = 1; i < markdownLine.size(); i++) {
                if (markdownLine[i - 1] != '\\' && markdownLine[i] == '|') {
                    if (i != markdownLine.size() - 1) tableColumnStrings.push_back(string());
                    continue;
                }
                tableColumnStrings[tableColumnStrings.size() - 1]+= markdownLine[i];
                if (markdownLine[i] != '-' && markdownLine[i] != ' ' && markdownLine[i] != '\t' && markdownLine[i] != '|') separator = false;
            }
            if (separator == false) {
                xml+= "<table-row>\n";
                for (auto tableColumnString: tableColumnStrings) {
                    tableColumnString = StringTools::replace(tableColumnString, "\\<", "<");
                    tableColumnString = StringTools::replace(tableColumnString, "\\>", ">");
                    tableColumnString = StringTools::replace(tableColumnString, "\\|", "|");
                    string textSize = "{$fontsize.default}";
                    string backgroundColor = (inTableIdx % 2) == 0?"{$color.element_midground}":"{$color.element_background}";
                    xml+= "<table-cell padding='5' background-color='" + backgroundColor + "' border='1' border-color='{$color.element_frame}'>\n";
                    xml+= "\t<text font='{$font.default}' size='" + textSize + "' text='" + GUIParser::escape(StringTools::trim(tableColumnString)) + "' color='{$color.font_normal}' width='auto' height='auto' />\n";
                    xml+= "</table-cell>\n";
                }
                xml+= "</table-row>\n";
                inTableIdx++;
            }
        } else {
            // text
            string tocId;
            string textSize = "{$fontsize.default}";
            if (StringTools::startsWith(markdownLine, "####") == true) {
                markdownLine = StringTools::trim(StringTools::substring(markdownLine, 4));
                textSize = "{$fontsize.h4}";
                tocId = to_string(tocIdx++);
                tocLevel4++;
                string tocLevel;
                tocLevel+= StringTools::padLeft(to_string(tocLevel1), "0", 3) + ".";
                tocLevel+= StringTools::padLeft(to_string(tocLevel2), "0", 3) + ".";
                tocLevel+= StringTools::padLeft(to_string(tocLevel3), "0", 3) + ".";
                tocLevel+= StringTools::padLeft(to_string(tocLevel4), "0", 3) + ".";
                toc.push_back(
                    {
                        .id = tocId,
                        .level = tocLevel,
                        .title = markdownLine
                    }
                );
            } else
            if (StringTools::startsWith(markdownLine, "###") == true) {
                markdownLine = StringTools::trim(StringTools::substring(markdownLine, 3));
                textSize = "{$fontsize.h3}";
                tocId = to_string(tocIdx++);
                tocLevel3++;
                tocLevel4 = 0;
                string tocLevel;
                tocLevel+= StringTools::padLeft(to_string(tocLevel1), "0", 3) + ".";
                tocLevel+= StringTools::padLeft(to_string(tocLevel2), "0", 3) + ".";
                tocLevel+= StringTools::padLeft(to_string(tocLevel3), "0", 3) + ".";
                toc.push_back(
                    {
                        .id = tocId,
                        .level = tocLevel,
                        .title = markdownLine
                    }
                );
            } else
            if (StringTools::startsWith(markdownLine, "##") == true) {
                markdownLine = StringTools::trim(StringTools::substring(markdownLine, 2));
                textSize = "{$fontsize.h2}";
                tocId = to_string(tocIdx++);
                tocLevel2++;
                tocLevel3 = 0;
                tocLevel4 = 0;
                string tocLevel;
                tocLevel+= StringTools::padLeft(to_string(tocLevel1), "0", 3) + ".";
                tocLevel+= StringTools::padLeft(to_string(tocLevel2), "0", 3) + ".";
                toc.push_back(
                    {
                        .id = tocId,
                        .level = tocLevel,
                        .title = markdownLine
                    }
                );
            } else
            if (StringTools::startsWith(markdownLine, "#") == true) {
                markdownLine = StringTools::trim(StringTools::substring(markdownLine, 1));
                textSize = "{$fontsize.h1}";
                tocId = to_string(tocIdx++);
                tocLevel1++;
                tocLevel2 = 0;
                tocLevel3 = 0;
                tocLevel4 = 0;
                string tocLevel;
                tocLevel+= StringTools::padLeft(to_string(tocLevel1), "0", 3) + ".";
                toc.push_back(
                    {
                        .id = tocId,
                        .level = tocLevel,
                        .title = markdownLine
                    }
                );
            }
            xml+= "<styled-text " + (tocId.empty() == false?"id = '" + tocId + "' ":"") + "font='{$font.default}' size='" + textSize + "' color='{$color.font_normal}' width='*' height='auto'>" + GUIParser::escape(markdownLine) + "</styled-text>\n";
        }
    }
    if (inCode == true) {
        xml+= "<space height='10'/>\n";
        xml+= "<styled-text font='{$font.default}' size='{$fontsize.default}' color='{$color.font_normal}' background-color='{$color.element_midground}' border-color='{$color.element_frame}' border='1' padding='5' width='*' height='auto' preformatted='true'>\n";
        xml+= " <![CDATA[\n";
        xml+= StringTools::replace(StringTools::replace(inCodeString, "[", "\\["), "]", "\\]");
        xml+= " ]]>\n";
        xml+= "</styled-text>\n";
        xml+= "<space height='10'/>\n";
    }
    if (inTable == true) xml+= "</table>\n";
    //
    xml+= "\t\t</layout>\n";
    xml+= "\t</scrollarea>\n";
    xml+= "</screen>\n";
    // FileSystem::getStandardFileSystem()->setContentFromString(".", "xxx.xml", xml);
    return xml;
}