Add standard shortcut for "Show/Hide Hidden Files"

Summary:
Add a standard shortcut for this action so it can be synchronized between different apps
and the file dialog; see https://bugs.kde.org/show_bug.cgi?id=262551.

The action in Dolphin also has F8 bound to this, but the definition here only accept two
default shortcuts, and F8 seems kind of random.

CCBUG: 262551

Test Plan: Apply D28803 to KIO and D28804 to Dolphin and test there

Reviewers: dfaure, #frameworks

Reviewed By: dfaure

Subscribers: kde-frameworks-devel

Tags: #frameworks

Differential Revision: https://phabricator.kde.org/D28802

src/gui/kstandardshortcut.cpp

@@ -166,6 +166,7 @@ static KStandardShortcutInfo g_infoStandardShortcut[] = {
     { RenameFile, "RenameFile", QT_TRANSLATE_NOOP3("KStandardShortcut", "Rename", "@action"), Qt::Key_F2, 0, QList<QKeySequence>(), false },
     { MoveToTrash, "MoveToTrash", QT_TRANSLATE_NOOP3("KStandardShortcut", "Move to Trash", "@action"), Qt::Key_Delete, 0, QList<QKeySequence>(), false },
     { Donate, "Donate", QT_TRANSLATE_NOOP3("KStandardShortcut", "Donate", "@action"), 0, 0, QList<QKeySequence>(), false },
+    { ShowHideHiddenFiles, "ShowHideHiddenFiles", QT_TRANSLATE_NOOP3("KStandardShortcut", "Show/Hide Hidden Files", "@action"), CTRL(H), ALT(Period), QList<QKeySequence>(), false },
 
     //dummy entry to catch simple off-by-one errors. Insert new entries before this line.
     { AccelNone, nullptr, {nullptr, nullptr}, 0, 0, QList<QKeySequence>(), false }
@@ -557,4 +558,9 @@ const QList<QKeySequence> &preferences()
     return shortcut(Preferences);
 }
 
+const QList<QKeySequence> &showHideHiddenFiles()
+{
+    return shortcut(ShowHideHiddenFiles);
+}
+
 }

src/gui/kstandardshortcut.h

@@ -141,6 +141,7 @@ enum StandardShortcut {
     RenameFile, ///< Rename files or folders. @since 5.25
     MoveToTrash, ///< Move files or folders to the trash. @since 5.25
     Donate, ///< Open donation page on kde.org. @since 5.26
+    ShowHideHiddenFiles, ///< Toggle showing or hiding hidden files @since 5.70
     // Insert new items here!
 
     StandardShortcutCount // number of standard shortcuts
@@ -526,6 +527,14 @@ KCONFIGGUI_EXPORT const QList<QKeySequence> &moveToTrash();
  * @since 5.64
  */
 KCONFIGGUI_EXPORT const QList<QKeySequence> &preferences();
+
+/**
+ * Shows or hides hidden files. Defaults: Ctrl+H, Alt+.
+ * @return the shortcut of the standard accelerator
+ * @since 5.70
+ */
+KCONFIGGUI_EXPORT const QList<QKeySequence> &showHideHiddenFiles();
+
 }
 
 #endif // KSTANDARDSHORTCUT_H