highlighter: no need to check if a header is valid

It is fixed in the upstream pmh_parser.

src/hgmarkdownhighlighter.cpp

@@ -271,9 +271,6 @@ void HGMarkdownHighlighter::initBlockHighlightFromResult(int nrBlocks)
         const HighlightingStyle &style = highlightingStyles[i];
         pmh_element *elem_cursor = result[style.type];
 
-        // pmh_H1 to pmh_H6 is continuous.
-        bool isHeader = style.type >= pmh_H1 && style.type <= pmh_H6;
-
         while (elem_cursor != NULL)
         {
             // elem_cursor->pos and elem_cursor->end is the start
@@ -283,13 +280,6 @@ void HGMarkdownHighlighter::initBlockHighlightFromResult(int nrBlocks)
                 continue;
             }
 
-            // Check header. Skip those headers with no spaces after #s.
-            if (isHeader
-                && !isValidHeader(elem_cursor->pos, elem_cursor->end)) {
-                elem_cursor = elem_cursor->next;
-                continue;
-            }
-
             initBlockHighlihgtOne(elem_cursor->pos, elem_cursor->end, i);
             elem_cursor = elem_cursor->next;
         }
@@ -383,8 +373,7 @@ void HGMarkdownHighlighter::initHeaderRegionsFromResult()
     for (int i = 0; i < 6; ++i) {
         pmh_element *elem = result[hx[i]];
         while (elem != NULL) {
-            if (elem->end <= elem->pos
-                || !isValidHeader(elem->pos, elem->end)) {
+            if (elem->end <= elem->pos) {
                 elem = elem->next;
                 continue;
             }
@@ -1015,27 +1004,6 @@ void HGMarkdownHighlighter::highlightChanged()
     m_completeTimer->start();
 }
 
-bool HGMarkdownHighlighter::isValidHeader(unsigned long p_pos, unsigned long p_end)
-{
-    // There must exist spaces after #s.
-    // No more than 6 #s.
-    int nrNumberSign = 0;
-    for (unsigned long i = p_pos; i < p_end; ++i) {
-        QChar ch = document->characterAt(i);
-        if (ch.isSpace()) {
-            return nrNumberSign > 0;
-        } else if (ch == QChar('#')) {
-            if (++nrNumberSign > 6) {
-                return false;
-            }
-        } else {
-            return false;
-        }
-    }
-
-    return false;
-}
-
 bool HGMarkdownHighlighter::isValidHeader(const QString &p_text)
 {
     // There must exist spaces after #s.

src/hgmarkdownhighlighter.h

@@ -410,9 +410,6 @@ private:
     // Highlight color column in code block.
     void highlightCodeBlockColorColumn(const QString &p_text);
 
-    // Check if [p_pos, p_end) is a valid header.
-    bool isValidHeader(unsigned long p_pos, unsigned long p_end);
-
     bool isValidHeader(const QString &p_text);
 
     VTextBlockData *currentBlockData() const;

src/vmdeditor.cpp

@@ -298,8 +298,8 @@ void VMdEditor::contextMenuEvent(QContextMenuEvent *p_event)
                         emit m_object->discardAndRead();
                     });
 
-            QAction *toggleLivePreviewAct = new QAction(tr("Toggle Live Preview"), menu.data());
-            toggleLivePreviewAct->setToolTip(tr("Toggle live preview of diagrams"));
+            QAction *toggleLivePreviewAct = new QAction(tr("Live Preview for Diagrams"), menu.data());
+            toggleLivePreviewAct->setToolTip(tr("Toggle live preview panel for diagrams"));
             connect(toggleLivePreviewAct, &QAction::triggered,
                     this, [this]() {
                         m_editTab->toggleLivePreview();