Add Markdown support to TextEdit

- textFormat can be set to MarkdownText, and markdown can be
  loaded into the text property
- markdown text can be pulled out of the text property
- if there are lists with checkboxes, you can click them to
  change the checkbox state

Change-Id: I450115c732d737446ae71806e4abb18e8cc639f3
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>
 
 

1 files changed, 43 insertions, 1 deletions

diff --git a/src/quick/items/qquicktextcontrol.cpp b/src/quick/items/qquicktextcontrol.cpp
index ac8093e10b..5c4ecd60aa 100644
--- a/src/quick/items/qquicktextcontrol.cpp
+++ b/src/quick/items/qquicktextcontrol.cpp
@@ -113,6 +113,7 @@ QQuickTextControlPrivate::QQuickTextControlPrivate()
       wordSelectionEnabled(false),
       hasImState(false),
       cursorRectangleChanged(false),
+      hoveredMarker(false),
       lastSelectionStart(-1),
       lastSelectionEnd(-1)
 {}
@@ -321,6 +322,9 @@ void QQuickTextControlPrivate::setContent(Qt::TextFormat format, const QString &
             formatCursor.select(QTextCursor::Document);
             formatCursor.setCharFormat(charFormatForInsertion);
             formatCursor.endEditBlock();
+        } else if (format == Qt::MarkdownText) {
+            doc->setBaseUrl(doc->baseUrl().adjusted(QUrl::RemoveFilename));
+            doc->setMarkdown(text);
         } else {
 #if QT_CONFIG(texthtmlparser)
             doc->setHtml(text);
@@ -801,6 +805,12 @@ void QQuickTextControl::setPlainText(const QString &text)
     d->setContent(Qt::PlainText, text);
 }
 
+void QQuickTextControl::setMarkdownText(const QString &text)
+{
+    Q_D(QQuickTextControl);
+    d->setContent(Qt::MarkdownText, text);
+}
+
 void QQuickTextControl::setHtml(const QString &text)
 {
     Q_D(QQuickTextControl);
@@ -1027,6 +1037,8 @@ void QQuickTextControlPrivate::mousePressEvent(QMouseEvent *e, const QPointF &po
             cursor.clearSelection();
         }
     }
+    if (interactionFlags & Qt::TextEditable)
+        blockWithMarkerUnderMousePress = q->blockWithMarkerAt(pos);
     if (e->button() & Qt::MiddleButton) {
         return;
     } else  if (!(e->button() & Qt::LeftButton)) {
@@ -1198,6 +1210,16 @@ void QQuickTextControlPrivate::mouseReleaseEvent(QMouseEvent *e, const QPointF &
         q->updateCursorRectangle(true);
     }
 
+    if ((interactionFlags & Qt::TextEditable) && (e->button() & Qt::LeftButton) && blockWithMarkerUnderMousePress.isValid()) {
+        QTextBlock block = q->blockWithMarkerAt(pos);
+        if (block == blockWithMarkerUnderMousePress) {
+            auto fmt = block.blockFormat();
+            fmt.setMarker(fmt.marker() == QTextBlockFormat::Unchecked ?
+                              QTextBlockFormat::Checked : QTextBlockFormat::Unchecked);
+            cursor.setBlockFormat(fmt);
+        }
+    }
+
     if (interactionFlags & Qt::LinksAccessibleByMouse) {
         if (!(e->button() & Qt::LeftButton))
             return;
@@ -1480,8 +1502,15 @@ void QQuickTextControlPrivate::hoverEvent(QHoverEvent *e, const QPointF &pos)
     if (hoveredLink != link) {
         hoveredLink = link;
         emit q->linkHovered(link);
+        qCDebug(DBG_HOVER_TRACE) << q << e->type() << pos << "hoveredLink" << hoveredLink;
+    } else {
+        QTextBlock block = q->blockWithMarkerAt(pos);
+        if (block.isValid() != hoveredMarker)
+            emit q->markerHovered(block.isValid());
+        hoveredMarker = block.isValid();
+        if (hoveredMarker)
+            qCDebug(DBG_HOVER_TRACE) << q << e->type() << pos << "hovered marker" << block.blockFormat().marker() << block.text();
     }
-    qCDebug(DBG_HOVER_TRACE) << q << e->type() << pos << "hoveredLink" << hoveredLink;
 }
 
 bool QQuickTextControl::hasImState() const
@@ -1557,6 +1586,12 @@ QString QQuickTextControl::anchorAt(const QPointF &pos) const
     return d->doc->documentLayout()->anchorAt(pos);
 }
 
+QTextBlock QQuickTextControl::blockWithMarkerAt(const QPointF &pos) const
+{
+    Q_D(const QQuickTextControl);
+    return d->doc->documentLayout()->blockWithMarkerAt(pos);
+}
+
 void QQuickTextControl::setAcceptRichText(bool accept)
 {
     Q_D(QQuickTextControl);
@@ -1786,6 +1821,13 @@ QString QQuickTextControl::toHtml() const
 }
 #endif
 
+#if QT_CONFIG(textmarkdownwriter)
+QString QQuickTextControl::toMarkdown() const
+{
+    return document()->toMarkdown();
+}
+#endif
+
 bool QQuickTextControl::cursorOn() const
 {
     Q_D(const QQuickTextControl);