filterbar: Add support to match case and glob patterns for the filter bar

Currently, Dolphin's filter bar defaults to plain text, but it actually has a hidden regex functionality too: it tries to auto-detect and switch to a regular expression if characters like '*', '?', or '[' are present in the search string.
This approach has a couple of issues. First, the regex/wildcard functionality is completely hidden from the user. Second, the auto-detection is flawed because those are perfectly valid characters in Linux filenames. If a user tries to filter for a file literally named [draft].txt, the auto-switching kicks in and causes unexpected behavior.

This MR fixes this by making the filtering modes explicit through a ComboBox at the side of the filter bar, with the options 'Plain Text', 'Glob' and 'Regular Expression'. It also adds a button to toggle the case sensitive matching. A visual feedback for when the user is inputting an invalid expression has also been implemented by turning the bar background red and making appear an error symbol.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/dolphinviewcontainer.cpp b/src/dolphinviewcontainer.cpp
index 5c054eab8..4d7472ed3 100644
--- a/src/dolphinviewcontainer.cpp
+++ b/src/dolphinviewcontainer.cpp
@@ -110,6 +110,8 @@ DolphinViewContainer::DolphinViewContainer(const QUrl &url, QWidget *parent)
     m_filterBar->setVisible(GeneralSettings::filterBar(), WithoutAnimation);
 
     connect(m_filterBar, &FilterBar::filterChanged, this, &DolphinViewContainer::setNameFilter);
+    connect(m_filterBar, &FilterBar::filterModeChanged, this, &DolphinViewContainer::setFilterMode);
+    connect(m_filterBar, &FilterBar::caseSensitiveChanged, this, &DolphinViewContainer::setFilterCaseSensitive);
     connect(m_filterBar, &FilterBar::closeRequest, this, &DolphinViewContainer::closeFilterBar);
     connect(m_filterBar, &FilterBar::focusViewRequest, this, &DolphinViewContainer::requestFocus);
 
@@ -208,6 +210,10 @@ DolphinViewContainer::DolphinViewContainer(const QUrl &url, QWidget *parent)
     connect(placesModel, &KFilePlacesModel::rowsRemoved, this, &DolphinViewContainer::slotPlacesModelChanged);
 
     QApplication::instance()->installEventFilter(this);
+
+    // Update the view with the current state of the filter bar (from the state config)
+    m_view->setFilterMode(m_filterBar->filterMode());
+    m_view->setFilterCaseSensitive(m_filterBar->isCaseSensitive());
 }
 
 DolphinViewContainer::~DolphinViewContainer() = default;
@@ -867,6 +873,18 @@ void DolphinViewContainer::setNameFilter(const QString &nameFilter)
     delayedStatusBarUpdate();
 }
 
+void DolphinViewContainer::setFilterMode(const KFileItemModelFilter::FilterMode mode)
+{
+    m_view->setFilterMode(mode);
+    delayedStatusBarUpdate();
+}
+
+void DolphinViewContainer::setFilterCaseSensitive(const bool caseSensitive)
+{
+    m_view->setFilterCaseSensitive(caseSensitive);
+    delayedStatusBarUpdate();
+}
+
 void DolphinViewContainer::activate()
 {
     setActive(true);