1 files changed, 74 insertions, 3 deletions
diff --git a/src/Utils.cpp b/src/Utils.cpp
index 8a3b9e4c..36406361 100644
--- a/src/Utils.cpp
+++ b/src/Utils.cpp
@@ -18,6 +18,7 @@
#include <QXmlStreamReader>
#include <cmath>
+#include <fmt/core.h>
#include <variant>
#include <cmark.h>
@@ -468,11 +469,81 @@ utils::escapeBlacklistedHtml(const QString &rawStr)
}
QString
-utils::markdownToHtml(const QString &text)
+utils::markdownToHtml(const QString &text, bool rainbowify)
{
- const auto str = text.toUtf8();
- const char *tmp_buf = cmark_markdown_to_html(str.constData(), str.size(), CMARK_OPT_UNSAFE);
+ const auto str = text.toUtf8();
+ cmark_node *const node =
+ cmark_parse_document(str.constData(), str.size(), CMARK_OPT_UNSAFE);
+ if (rainbowify) {
+ // create iterator over node
+ cmark_iter *iter = cmark_iter_new(node);
+
+ cmark_event_type ev_type;
+
+ // First loop to get total text length
+ int textLen = 0;
+ while ((ev_type = cmark_iter_next(iter)) != CMARK_EVENT_DONE) {
+ cmark_node *cur = cmark_iter_get_node(iter);
+ // only text nodes (no code or semilar)
+ if (cmark_node_get_type(cur) != CMARK_NODE_TEXT)
+ continue;
+ // count up by length of current node's text
+ textLen += strlen(cmark_node_get_literal(cur));
+ }
+
+ // create new iter to start over
+ cmark_iter_free(iter);
+ iter = cmark_iter_new(node);
+
+ // Second loop to rainbowify
+ int charIdx = 0;
+ while ((ev_type = cmark_iter_next(iter)) != CMARK_EVENT_DONE) {
+ cmark_node *cur = cmark_iter_get_node(iter);
+ // only text nodes (no code or semilar)
+ if (cmark_node_get_type(cur) != CMARK_NODE_TEXT)
+ continue;
+
+ // get text in current node
+ const char *tmp_buf = cmark_node_get_literal(cur);
+ std::string nodeText(tmp_buf);
+ // create buffer to append rainbow text to
+ std::string buf;
+ for (int i = 0; i < nodeText.length(); i++) {
+ // Don't rainbowify spaces
+ if (nodeText.at(i) == ' ') {
+ buf.push_back(' ');
+ continue;
+ }
+
+ // get correct color for char index
+ auto color = QColor::fromHsvF(1.0 / textLen * charIdx, 1.0, 1.0);
+ // format color for HTML
+ auto colorString = color.name(QColor::NameFormat::HexRgb);
+ // create HTML element for current char
+ auto curChar = fmt::format("<font color=\"{}\">{}</font>",
+ colorString.toStdString(),
+ nodeText.at(i));
+ // append colored HTML element to buffer
+ buf.append(curChar);
+
+ charIdx++;
+ }
+
+ // create HTML_INLINE node to prevent HTML from being escaped
+ auto htmlNode = cmark_node_new(CMARK_NODE_HTML_INLINE);
+ // set content of HTML node to buffer contents
+ cmark_node_set_literal(htmlNode, buf.c_str());
+ // replace current node with HTML node
+ cmark_node_replace(cur, htmlNode);
+ // free memory of old node
+ cmark_node_free(cur);
+ }
+
+ cmark_iter_free(iter);
+ }
+
+ const char *tmp_buf = cmark_render_html(node, CMARK_OPT_UNSAFE);
// Copy the null terminated output buffer.
std::string html(tmp_buf);
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