#2126 editor: allow header folding

Signed-off-by: Patrizio Bekerle <patrizio@bekerle.com>

Author: pbek

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## 26.3.13
 
+- Added Markdown heading folding in the note editor with clickable gutter
+  toggles, fold/unfold-all actions, and a new Editor setting to enable or
+  disable the feature (for [#2126](https://github.com/pbek/QOwnNotes/issues/2126))
 - Added a new "Files" tab to the Navigation panel that lists linked media files
   and attachments under separate root items, jumps to the selected link in the
   current note, and offers a context menu action to open the file externally

src/dialogs/settingsdialog.cpp

@@ -629,6 +629,8 @@ void SettingsDialog::storeSettings() {
                       ui->showLineNumbersInEditorCheckBox->isChecked());
     settings.setValue(QStringLiteral("Editor/highlightCurrentLine"),
                       ui->highlightCurrentLineCheckBox->isChecked());
+    settings.setValue(QStringLiteral("Editor/headingFolding"),
+                      ui->headingFoldingCheckBox->isChecked());
     settings.setValue(QStringLiteral("Editor/hideFormattingSyntax"),
                       ui->hideFormattingSyntaxCheckBox->isChecked());
     settings.setValue(QStringLiteral("Editor/hangingIndent"),
@@ -1038,6 +1040,8 @@ void SettingsDialog::readSettings() {
         settings.value(QStringLiteral("Editor/showLineNumbers")).toBool());
     ui->highlightCurrentLineCheckBox->setChecked(
         settings.value(QStringLiteral("Editor/highlightCurrentLine"), true).toBool());
+    ui->headingFoldingCheckBox->setChecked(
+        settings.value(QStringLiteral("Editor/headingFolding"), false).toBool());
     ui->hideFormattingSyntaxCheckBox->setChecked(
         settings.value(QStringLiteral("Editor/hideFormattingSyntax"), false).toBool());
     ui->hangingIndentCheckBox->setChecked(

src/dialogs/settingsdialog.ui

@@ -5664,15 +5664,25 @@ li.checked::marker { content: "\2612"; }
                   </property>
                  </widget>
                 </item>
-                <item row="10" column="0" colspan="4">
-                 <widget class="QCheckBox" name="showMarkdownImagePreviewsCheckBox">
-                  <property name="text">
-                   <string>Show small Markdown preview images in the editor, if there is no text after the image</string>
-                  </property>
-                 </widget>
-                </item>
-                <item row="7" column="1">
-                 <widget class="QSpinBox" name="cursorWidthSpinBox">
+                 <item row="10" column="0" colspan="4">
+                  <widget class="QCheckBox" name="showMarkdownImagePreviewsCheckBox">
+                   <property name="text">
+                    <string>Show small Markdown preview images in the editor, if there is no text after the image</string>
+                   </property>
+                  </widget>
+                 </item>
+                 <item row="11" column="0" colspan="4">
+                  <widget class="QCheckBox" name="headingFoldingCheckBox">
+                   <property name="toolTip">
+                    <string>Shows fold buttons for Markdown headings and allows collapsing their contents</string>
+                   </property>
+                   <property name="text">
+                    <string>Enable heading folding in the editor</string>
+                   </property>
+                  </widget>
+                 </item>
+                 <item row="7" column="1">
+                  <widget class="QSpinBox" name="cursorWidthSpinBox">
                   <property name="suffix">
                    <string notr="true">px</string>
                   </property>
@@ -5702,10 +5712,10 @@ li.checked::marker { content: &quot;\2612&quot;; }
                   </property>
                  </widget>
                 </item>
-                 <item row="11" column="0" colspan="4">
-                  <widget class="QCheckBox" name="hideFormattingSyntaxCheckBox">
-                   <property name="toolTip">
-                    <string>Hides markdown formatting syntax (like **, *, #) on lines that are not being edited</string>
+                  <item row="12" column="0" colspan="4">
+                   <widget class="QCheckBox" name="hideFormattingSyntaxCheckBox">
+                    <property name="toolTip">
+                     <string>Hides markdown formatting syntax (like **, *, #) on lines that are not being edited</string>
                    </property>
                    <property name="text">
                     <string>Hide markdown formatting syntax on inactive lines</string>
@@ -7854,7 +7864,8 @@ Just test yourself if you get sync conflicts and set a higher value if so.</stri
   <tabstop>autoBracketRemovalCheckBox</tabstop>
   <tabstop>editorWidthInDFMOnlyCheckBox</tabstop>
   <tabstop>highlightCurrentLineCheckBox</tabstop>
-   <tabstop>hideFormattingSyntaxCheckBox</tabstop>
+    <tabstop>headingFoldingCheckBox</tabstop>
+    <tabstop>hideFormattingSyntaxCheckBox</tabstop>
    <tabstop>disableCursorBlinkingCheckBox</tabstop>
   <tabstop>gitCommitIntervalTime</tabstop>
   <tabstop>gitLogCommandLineEdit</tabstop>