Add preferences widget 'PrefMultiEntry'

This is a multiline text input, similar to 'PrefEntry'

Newlines characters in the multiline input will be converted to '|'
in the saved preference. This is because the XML parser will convert
real newline characters to spaces when reading the preferences file
the next time.

2 files changed, 43 insertions, 0 deletions

diff --git a/src/ui/widget/preferences-widget.cpp b/src/ui/widget/preferences-widget.cpp
index 2981316c0..e93b83db4 100644
--- a/src/ui/widget/preferences-widget.cpp
+++ b/src/ui/widget/preferences-widget.cpp
@@ -34,6 +34,7 @@
 
 #include <glibmm/i18n.h>
 #include <glibmm/convert.h>
+#include <glibmm/regex.h>
 
 #ifdef WIN32
 #include <windows.h>
@@ -859,6 +860,36 @@ void PrefEntry::on_changed()
     }
 }
 
+void PrefMultiEntry::init(Glib::ustring const &prefs_path, int height)
+{
+    // TODO: Figure out if there's a way to specify height in lines instead of px
+    //       and how to obtain a reasonable default width if 'expand_widget' is not used
+    set_size_request(100, height);
+    set_hexpand(true);
+    set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
+    set_shadow_type(Gtk::SHADOW_IN);
+
+    add(_text);
+
+    _prefs_path = prefs_path;
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    Glib::ustring value = prefs->getString(_prefs_path);
+    value = Glib::Regex::create("\\|")->replace_literal(value, 0, "\n", (Glib::RegexMatchFlags)0);
+    _text.get_buffer()->set_text(value);
+    _text.get_buffer()->signal_changed().connect(sigc::mem_fun(*this, &PrefMultiEntry::on_changed));
+}
+
+void PrefMultiEntry::on_changed()
+{
+    if (get_visible()) //only take action if user changed value
+    {
+        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+        Glib::ustring value = _text.get_buffer()->get_text();
+        value = Glib::Regex::create("\\n")->replace_literal(value, 0, "|", (Glib::RegexMatchFlags)0);
+        prefs->setString(_prefs_path, value);
+    } 
+}
+
 void PrefColorPicker::init(Glib::ustring const &label, Glib::ustring const &prefs_path,
                            guint32 default_rgba)
 {
diff --git a/src/ui/widget/preferences-widget.h b/src/ui/widget/preferences-widget.h
index 142793509..2578be533 100644
--- a/src/ui/widget/preferences-widget.h
+++ b/src/ui/widget/preferences-widget.h
@@ -28,6 +28,8 @@
 #include <sigc++/sigc++.h>
 #include <gtkmm/checkbutton.h>
 #include <gtkmm/radiobutton.h>
+#include <gtkmm/scrolledwindow.h>
+#include <gtkmm/textview.h>
 #include <gtkmm/comboboxtext.h>
 #include <gtkmm/drawingarea.h>
 #include <gtkmm/grid.h>
@@ -195,6 +197,16 @@ protected:
     void on_changed();
 };
 
+class PrefMultiEntry : public Gtk::ScrolledWindow
+{
+public:
+    void init(Glib::ustring const &prefs_path, int height);
+protected:
+    Glib::ustring       _prefs_path;
+    Gtk::TextView       _text;
+    void on_changed();
+};
+
 class PrefEntryButtonHBox : public Gtk::HBox
 {
 public: