Add QTextMarkdownImporter

This provides the ability to read from a Markdown string or file into
a QTextDocument, such that the formatting will be recognized and can be
rendered.

- Add QTextDocument::setMarkdown(QString)
- Add QTextEdit::setMarkdown(QString)
- Add TextFormat::MarkdownText
- QWidgetTextControl::setContent() calls QTextDocument::setMarkdown()
  if that's the format

Fixes: QTBUG-72349
Change-Id: Ief2ad71bf840666c64145d58e9ca71d05fad5659
Reviewed-by: Lisandro Damián Nicanor Pérez Meyer <perezmeyer@gmail.com>
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/corelib/global/qnamespace.h b/src/corelib/global/qnamespace.h
index 90dd36113f..06aef81afc 100644
--- a/src/corelib/global/qnamespace.h
+++ b/src/corelib/global/qnamespace.h
@@ -1198,7 +1198,8 @@ public:
     enum TextFormat {
         PlainText,
         RichText,
-        AutoText
+        AutoText,
+        MarkdownText
     };
 
     enum AspectRatioMode {