Start supporting more specific window title detection (#75)

* Add default set of assumptions about window titles

This will leave the special cases for Google Chrome and Slack, but start getting granularity for free on windows that follow the general convention of ` - ` to separate out the application name at the end of the window title.

* Clean up name identification to make it similar for both directions

This will make it very easy to continue adding special cases for other applications

* Add support for Microsoft Edge

data.go

@@ -155,32 +155,63 @@ func (w *Window) IsOnDesktop(desktop int64) bool {
 	return w.IsSticky() || w.Desktop == desktop
 }
 
+const (
+	defaultWindowTitleSeparator       = " - "
+	microsoftEdgeWindowTitleSeparator = "\u200e- "
+)
+
 // Info returns more structured metadata about a window. The metadata
 // is extracted using heuristics.
+//
+// Assumptions:
+//     1) Most windows use " - " to separate their window names from their content
+//     2) Most windows use the " - " with the application name at the end.
+//     3) The few programs that reverse this convention only reverse it.
 func (w *Window) Info() *Winfo {
-	fields := strings.Split(w.Name, " - ")
-	first := strings.TrimSpace(fields[0])
-	last := strings.TrimSpace(fields[len(fields)-1])
-	if last == "Google Chrome" {
-		if len(fields) > 1 {
+	// Special Cases
+	fields := strings.Split(w.Name, defaultWindowTitleSeparator)
+	if len(fields) > 1 {
+		last := strings.TrimSpace(fields[len(fields)-1])
+		if last == "Google Chrome" {
 			return &Winfo{
 				App:    "Google Chrome",
 				SubApp: strings.TrimSpace(fields[len(fields)-2]),
-				Title:  strings.Join(fields[0:len(fields)-2], " - "),
+				Title:  strings.Join(fields[0:len(fields)-2], defaultWindowTitleSeparator),
 			}
-		} else {
+		}
+	}
+
+	if strings.Contains(w.Name, microsoftEdgeWindowTitleSeparator) {
+		// App Name Last
+		beforeSep := strings.LastIndex(w.Name, microsoftEdgeWindowTitleSeparator)
+		afterSep := beforeSep + len(microsoftEdgeWindowTitleSeparator)
+		return &Winfo{
+			App:   strings.TrimSpace(w.Name[afterSep:]),
+			Title: strings.TrimSpace(w.Name[:beforeSep]),
+		}
+	}
+
+	// Normal Cases
+	if beforeSep := strings.Index(w.Name, defaultWindowTitleSeparator); beforeSep > -1 {
+		// App Name First
+		if w.Name[:beforeSep] == "Slack" {
+			afterSep := beforeSep + len(defaultWindowTitleSeparator)
 			return &Winfo{
-				App:    "Google Chrome",
-				SubApp: "",
-				Title:  "",
+				App:   strings.TrimSpace(w.Name[:beforeSep]),
+				Title: strings.TrimSpace(w.Name[afterSep:]),
 			}
 		}
-	} else if first == "Slack" {
+
+		// App Name Last
+		beforeSep := strings.LastIndex(w.Name, defaultWindowTitleSeparator)
+		afterSep := beforeSep + len(defaultWindowTitleSeparator)
 		return &Winfo{
-			App:    "Slack",
-			SubApp: strings.TrimSpace(strings.Join(fields[1:], " - ")),
+			App:   strings.TrimSpace(w.Name[afterSep:]),
+			Title: strings.TrimSpace(w.Name[:beforeSep]),
 		}
 	}
+
+	// No Application name separator
 	return &Winfo{
 		Title: w.Name,
 	}