initial commit

clipboardurl.h

@@ -0,0 +1,73 @@
+#ifndef CLIPBOARDURL_H
+#define CLIPBOARDURL_H
+
+#include <QMimeData>
+#include <QRegularExpression>
+#include <QUrl>
+#ifndef QT_NO_DEBUG
+#include <QDebug>
+#endif
+
+namespace ClipboardUrl {
+
+inline QUrl parseText (const QString &text) {
+  QString urlText = text.trimmed();
+#ifndef QT_NO_DEBUG
+  qDebug() << "[clipboard] raw text:" << text
+           << "UTF-8 hex:" << text.toUtf8().toHex();
+#endif
+  if (urlText.size() >= 2) {
+    const QChar first = urlText.front();
+    const QChar last = urlText.back();
+    if ((first == '\'' && last == '\'') || (first == '"' && last == '"')
+        || (first == '<' && last == '>'))
+      urlText = urlText.mid (1, urlText.size() - 2).trimmed();
+  }
+
+  static const QRegularExpression markdownLink (
+      QStringLiteral ("\\A\\[[^\\r\\n]*\\]\\((https?://[^\\r\\n]+)\\)\\z"),
+      QRegularExpression::CaseInsensitiveOption);
+  const auto match = markdownLink.match (urlText);
+  if (match.hasMatch())
+    urlText = match.captured (1);
+
+  const QUrl url = QUrl::fromUserInput (urlText);
+#ifndef QT_NO_DEBUG
+  qDebug() << "[clipboard] normalized text:" << urlText
+           << "parsed URL:" << url << "valid:" << url.isValid()
+           << "scheme:" << url.scheme() << "host:" << url.host()
+           << "parse error:" << url.errorString();
+#endif
+  if (!url.isValid() || url.scheme().isEmpty() || url.host().isEmpty())
+    return QUrl();
+  return url;
+}
+
+inline QUrl fromMimeData (const QMimeData *mimeData) {
+  if (mimeData == nullptr) {
+#ifndef QT_NO_DEBUG
+    qDebug() << "[clipboard] MIME data unavailable";
+#endif
+    return QUrl();
+  }
+
+  const auto urls = mimeData->urls();
+#ifndef QT_NO_DEBUG
+  qDebug() << "[clipboard] MIME formats:" << mimeData->formats()
+           << "URL entries:" << urls;
+#endif
+  if (urls.size() == 1) {
+    const QUrl url = urls.first();
+    if (url.isValid() && !url.scheme().isEmpty() && !url.host().isEmpty()) {
+#ifndef QT_NO_DEBUG
+      qDebug() << "[clipboard] using MIME URL:" << url;
+#endif
+      return url;
+    }
+  }
+  return parseText (mimeData->text());
+}
+
+} // namespace ClipboardUrl
+
+#endif // CLIPBOARDURL_H