gui: aligned columns, theme colours, a second layout, and a scan-selection setting

1 files changed, 32 insertions, 1 deletions

diff --git a/gui/internal/ui/window.go b/gui/internal/ui/window.go
index 784fc64..61fe157 100644
--- a/gui/internal/ui/window.go
+++ b/gui/internal/ui/window.go
@@ -104,6 +104,7 @@ func NewWindow(app *gtk.Application, e *engine.Engine) *Window {
 		w.history.closeTab()
 		return false
 	})
+	themeColours(w.win)
 	w.applyPrefs(w.prefs)
 	return w
 }
@@ -225,7 +226,9 @@ func runInBackground(work func(context.Context) error, done func(error)) context
 
 // actionColours are what each action is painted in, so the eye finds the
 // deletions without reading: they are the ones that cannot be undone from
-// the window (his request, 2026-09-17).
+// the window. They are the fallbacks; themeColours replaces them with the
+// running theme's own, so the window looks like the rest of the desktop
+// rather than like GNOME's palette (his request, 2026-09-17).
 var actionColours = map[plan.Kind]string{
 	plan.Copy:            "#2a9d8f",
 	plan.Move:            "#3584e4",
@@ -234,6 +237,34 @@ var actionColours = map[plan.Kind]string{
 	plan.DeletePermanent: "#c01c28",
 }
 
+// themeColours takes what it can from the GTK theme: the accent for the
+// actions that file a document, the theme's own warning and error colours
+// for the two that take it away. A theme that names none of them leaves the
+// fallbacks above.
+func themeColours(w gtk.Widgetter) {
+	ctx := gtk.BaseWidget(w).StyleContext()
+	pick := func(names ...string) string {
+		for _, name := range names {
+			if rgba, ok := ctx.LookupColor(name); ok {
+				return fmt.Sprintf("#%02x%02x%02x",
+					int(rgba.Red()*255), int(rgba.Green()*255), int(rgba.Blue()*255))
+			}
+		}
+		return ""
+	}
+	set := func(kind plan.Kind, colour string) {
+		if colour != "" {
+			actionColours[kind] = colour
+		}
+	}
+	accent := pick("accent_color", "theme_selected_bg_color", "accent_bg_color")
+	set(plan.Move, accent)
+	set(plan.Copy, pick("success_color", "success_bg_color"))
+	set(plan.Rename, accent)
+	set(plan.Trash, pick("warning_color", "warning_bg_color"))
+	set(plan.DeletePermanent, pick("error_color", "destructive_color", "error_bg_color"))
+}
+
 // actionRank decides which action gives a row its colour when a file gets
 // several: the one that matters most to the reader.
 var actionRank = map[plan.Kind]int{