Reset adjust mode when hiding inputbar

Zathura sets a special adjust mode before showing the inputbar.
Remaining in that mode after it has been hidden breaks things like
rotation, so reset to none.

zathura/callbacks.c

@@ -747,6 +747,14 @@ void cb_gesture_zoom_scale_changed(GtkGestureZoom* UNUSED(self), gdouble scale,
   sc_zoom(zathura->ui.session, &argument, NULL, next_zoom * 100);
 }
 
+void cb_hide_inputbar(GtkWidget* widget, gpointer data) {
+  g_return_if_fail(widget != NULL);
+  g_return_if_fail(data != NULL);
+
+  zathura_t* zathura = data;
+  zathura_document_set_adjust_mode(zathura->document, ZATHURA_ADJUST_NONE);
+}
+
 void cb_hide_links(GtkWidget* widget, gpointer data) {
   g_return_if_fail(widget != NULL);
   g_return_if_fail(data != NULL);

zathura/callbacks.h

@@ -281,6 +281,11 @@ void cb_gesture_zoom_begin(GtkGesture* self, GdkEventSequence* sequence, void* d
 
 void cb_gesture_zoom_scale_changed(GtkGestureZoom* self, gdouble scale, void* data);
 
+/**
+ * Clean up after the inputbar has been hidden.
+ */
+void cb_hide_inputbar(GtkWidget* widget, gpointer data);
+
 /**
  * Clears all highlighted links when the inputbar gets closed
  *

zathura/zathura.c

@@ -245,6 +245,9 @@ static bool init_ui(zathura_t* zathura) {
     return false;
   }
 
+  g_signal_connect(GTK_WIDGET(zathura->ui.session->gtk.inputbar), "hide",
+                   G_CALLBACK(cb_hide_inputbar), zathura);
+
   g_signal_connect(G_OBJECT(zathura->ui.session->gtk.window), "size-allocate", G_CALLBACK(cb_view_resized), zathura);
 
   GtkAdjustment* hadjustment = gtk_scrolled_window_get_hadjustment(GTK_SCROLLED_WINDOW(zathura->ui.session->gtk.view));