Restructures the project source and cleans up a bit

1 files changed, 343 insertions, 0 deletions

diff --git a/src/renderers/geminirenderer.cpp b/src/renderers/geminirenderer.cpp
new file mode 100644
index 0000000..ec00869
--- /dev/null
+++ b/src/renderers/geminirenderer.cpp
@@ -0,0 +1,343 @@
+#include "geminirenderer.hpp"
+
+#include <QTextList>
+#include <QTextBlock>
+#include <QList>
+#include <QStringList>
+#include <QDebug>
+
+#include "kristall.hpp"
+
+static QByteArray trim_whitespace(QByteArray items)
+{
+    int start = 0;
+    while (start < items.size() and isspace(items.at(start)))
+    {
+        start += 1;
+    }
+    int end = items.size() - 1;
+    while (end > 0 and isspace(items.at(end)))
+    {
+        end -= 1;
+    }
+    return items.mid(start, end - start + 1);
+}
+
+std::unique_ptr<GeminiDocument> GeminiRenderer::render(
+        const QByteArray &input,
+        QUrl const &root_url,
+        DocumentStyle const & themed_style,
+        DocumentOutlineModel &outline)
+{
+    QTextCharFormat preformatted;
+    preformatted.setFont(themed_style.preformatted_font);
+    preformatted.setForeground(themed_style.preformatted_color);
+
+    QTextCharFormat standard;
+    standard.setFont(themed_style.standard_font);
+    standard.setForeground(themed_style.standard_color);
+
+    QTextCharFormat standard_link;
+    standard_link.setFont(themed_style.standard_font);
+    standard_link.setForeground(QBrush(themed_style.internal_link_color));
+
+    QTextCharFormat external_link;
+    external_link.setFont(themed_style.standard_font);
+    external_link.setForeground(QBrush(themed_style.external_link_color));
+
+    QTextCharFormat cross_protocol_link;
+    cross_protocol_link.setFont(themed_style.standard_font);
+    cross_protocol_link.setForeground(QBrush(themed_style.cross_scheme_link_color));
+
+    QTextCharFormat standard_h1;
+    standard_h1.setFont(themed_style.h1_font);
+    standard_h1.setForeground(QBrush(themed_style.h1_color));
+
+    QTextCharFormat standard_h2;
+    standard_h2.setFont(themed_style.h2_font);
+    standard_h2.setForeground(QBrush(themed_style.h2_color));
+
+    QTextCharFormat standard_h3;
+    standard_h3.setFont(themed_style.h3_font);
+    standard_h3.setForeground(QBrush(themed_style.h3_color));
+
+    std::unique_ptr<GeminiDocument> result = std::make_unique<GeminiDocument>();
+    result->setDocumentMargin(themed_style.margin);
+    result->background_color = themed_style.background_color;
+    result->setIndentWidth(20);
+
+    bool emit_fancy_text = global_options.enable_text_decoration;
+
+    QTextCursor cursor{result.get()};
+
+    QTextBlockFormat standard_format = cursor.blockFormat();
+
+    QTextBlockFormat preformatted_format = standard_format;
+    preformatted_format.setNonBreakableLines(true);
+
+    QTextBlockFormat block_quote_format = standard_format;
+    block_quote_format.setIndent(1);
+    block_quote_format.setBackground(themed_style.blockquote_color);
+
+
+    bool verbatim = false;
+    QTextList *current_list = nullptr;
+    bool blockquote = false;
+
+    outline.beginBuild();
+
+    int anchor_id = 0;
+
+    auto unique_anchor_name = [&]() -> QString {
+        return QString("auto-title-%1").arg(++anchor_id);
+    };
+
+    QList<QByteArray> lines = input.split('\n');
+    for (auto const &line : lines)
+    {
+        if (verbatim)
+        {
+            if (line.startsWith("```"))
+            {
+                cursor.setBlockFormat(standard_format);
+                verbatim = false;
+            }
+            else
+            {
+                cursor.setBlockFormat(preformatted_format);
+                cursor.setCharFormat(preformatted);
+                cursor.insertText(line + "\n");
+            }
+        }
+        else
+        {
+            if (line.startsWith("* "))
+            {
+                if (current_list == nullptr)
+                {
+                    cursor.deletePreviousChar();
+                    current_list = cursor.insertList(QTextListFormat::ListDisc);
+                }
+                else
+                {
+                    cursor.insertBlock();
+                }
+
+                QString item = trim_whitespace(line.mid(1));
+
+                cursor.insertText(item, standard);
+                continue;
+            }
+            else
+            {
+                if (current_list != nullptr)
+                {
+                    cursor.insertBlock();
+                    cursor.setBlockFormat(standard_format);
+                }
+                current_list = nullptr;
+            }
+
+            if(line.startsWith(">"))
+            {
+                if(not blockquote ) {
+                    // cursor.insertBlock();
+                }
+                blockquote  = true;
+
+                cursor.setBlockFormat(block_quote_format);
+                cursor.insertText(trim_whitespace(line.mid(1)) + "\n", standard);
+
+                continue;
+            }
+            else
+            {
+                if(blockquote) {
+                    cursor.setBlockFormat(standard_format);
+                }
+                blockquote  = false;
+            }
+
+            if (line.startsWith("###"))
+            {
+                auto heading = trim_whitespace(line.mid(3));
+
+                auto id = unique_anchor_name();
+                auto fmt = standard_h3;
+                fmt.setAnchor(true);
+                fmt.setAnchorNames(QStringList { id });
+
+                cursor.insertText(heading + "\n", fmt);
+                outline.appendH3(heading, id);
+            }
+            else if (line.startsWith("##"))
+            {
+                auto heading = trim_whitespace(line.mid(2));
+
+                auto id = unique_anchor_name();
+                auto fmt = standard_h2;
+                fmt.setAnchor(true);
+                fmt.setAnchorNames(QStringList { id });
+
+                cursor.insertText(heading + "\n", fmt);
+                outline.appendH2(heading, id);
+            }
+            else if (line.startsWith("#"))
+            {
+                auto heading = trim_whitespace(line.mid(1));
+
+                auto id = unique_anchor_name();
+                auto fmt = standard_h1;
+                fmt.setAnchor(true);
+                fmt.setAnchorNames(QStringList { id });
+
+                cursor.insertText(heading + "\n", fmt);
+                outline.appendH1(heading, id);
+            }
+            else if (line.startsWith("=>"))
+            {
+                auto const part = line.mid(2).trimmed();
+
+                QByteArray link, title;
+
+                int index = -1;
+                for (int i = 0; i < part.size(); i++)
+                {
+                    if (isspace(part[i]))
+                    {
+                        index = i;
+                        break;
+                    }
+                }
+
+                if (index > 0)
+                {
+                    link = trim_whitespace(part.mid(0, index));
+                    title = trim_whitespace(part.mid(index + 1));
+                }
+                else
+                {
+                    link = trim_whitespace(part);
+                    title = trim_whitespace(part);
+                }
+
+                auto local_url = QUrl(link);
+
+                auto absolute_url = root_url.resolved(QUrl(link));
+
+                // qDebug() << link << title;
+
+                auto fmt = standard_link;
+
+                QString prefix;
+                if (absolute_url.host() == root_url.host())
+                {
+                    prefix = themed_style.internal_link_prefix;
+                    fmt = standard_link;
+                }
+                else
+                {
+                    prefix = themed_style.external_link_prefix;
+                    fmt = external_link;
+                }
+
+                QString suffix = "";
+                if (absolute_url.scheme() != root_url.scheme())
+                {
+                    if(absolute_url.scheme() != "kristall+ctrl") {
+                        suffix = " [" + absolute_url.scheme().toUpper() + "]";
+                        fmt = cross_protocol_link;
+                    }
+                }
+
+                fmt.setAnchor(true);
+                fmt.setAnchorHref(absolute_url.toString());
+                cursor.insertText(prefix + title + suffix + "\n", fmt);
+            }
+            else if (line.startsWith("```"))
+            {
+                verbatim = true;
+            }
+            else
+            {
+                if(emit_fancy_text)
+                {
+                    // TODO: Fix UTF-8 encoding here… Don't emit single characters but always spans!
+
+                    bool rendering_bold = false;
+                    bool rendering_underlined = false;
+
+                    QTextCharFormat fmt = standard;
+
+                    QByteArray buffer;
+
+                    auto flush = [&]() {
+                        if(buffer.size() > 0) {
+                            cursor.insertText(QString::fromUtf8(buffer), fmt);
+                            buffer.resize(0);
+                        }
+                    };
+
+                    for(int i = 0; i < line.length(); i += 1)
+                    {
+                        char c = line.at(i);
+                        if(c == ' ') {
+                            flush();
+                            fmt = standard;
+                            buffer.append(' ');
+                            rendering_bold = false;
+                            rendering_underlined = false;
+                        }
+                        else if(c == '*') {
+                            if(rendering_bold) {
+                                buffer.append('*');
+                            }
+                            flush();
+                            rendering_bold = not rendering_bold;
+                            auto f = fmt.font();
+                            f.setBold(rendering_bold);
+                            fmt.setFont(f);
+                            if(rendering_bold) {
+                                buffer.append('*');
+                            }
+                        }
+                        else if(c == '_') {
+                            if(rendering_underlined) {
+                                buffer.append(' ');
+                            }
+                            flush();
+                            rendering_underlined = not rendering_underlined;
+                            auto f = fmt.font();
+                            fmt.setUnderlineStyle(rendering_underlined ? QTextCharFormat::SingleUnderline : QTextCharFormat::NoUnderline);
+                            if(rendering_underlined) {
+                                buffer.append(' ');
+                            }
+                        }
+                        else {
+                            buffer.append(c);
+                        }
+                    }
+
+                    flush();
+
+                    cursor.insertText("\n", standard);
+                }
+                else {
+                    cursor.insertText(line + "\n", standard);
+                }
+            }
+        }
+    }
+
+    outline.endBuild();
+    return result;
+}
+
+GeminiDocument::GeminiDocument(QObject *parent) : QTextDocument(parent),
+                                                  background_color(0x00, 0x00, 0x00)
+{
+}
+
+GeminiDocument::~GeminiDocument()
+{
+}