simplify isEnabled into enabled property

src/layouts/ilayout.ts

@@ -19,14 +19,14 @@
 // DEALINGS IN THE SOFTWARE.
 
 interface ILayout {
+    /* read-only */
+    readonly enabled: boolean;
+
+    /* methods */
     adjust?(area: Rect, tiles: Tile[], basis: Tile): void;
-
     apply(tiles: Tile[], area: Rect, workingArea?: Rect): void;
-
-    handleUserInput?(input: UserInput, data?: any): boolean;
-    /* if true, layout completely overrides the default behavior */
-
-    isEnabled(): boolean;
-
     toString(): string;
+
+    /* overriding */
+    handleUserInput?(input: UserInput, data?: any): boolean;
 }

src/layouts/monoclelayout.ts

@@ -19,6 +19,10 @@
 // DEALINGS IN THE SOFTWARE.
 
 class MonocleLayout implements ILayout {
+    public get enabled(): boolean {
+        return Config.enableMonocleLayout;
+    }
+
     public apply = (tiles: Tile[], area: Rect, workingArea?: Rect): void => {
         if (Config.monocleMaximize) {
             area = workingArea || area;
@@ -27,10 +31,6 @@ class MonocleLayout implements ILayout {
         tiles.forEach((tile) => (tile.geometry = area));
     }
 
-    public isEnabled(): boolean {
-        return Config.enableMonocleLayout;
-    }
-
     public toString(): string {
         return "MonocleLayout()";
     }

src/layouts/quarterlayout.ts

@@ -21,6 +21,10 @@
 class QuarterLayout implements ILayout {
     public static readonly MaxProportion = 0.8;
 
+    public get enabled(): boolean {
+        return Config.enableQuarterLayout;
+    }
+
     private lhsplit: number;
     private rhsplit: number;
     private vsplit: number;
@@ -114,10 +118,6 @@ class QuarterLayout implements ILayout {
             });
     }
 
-    public isEnabled(): boolean {
-        return Config.enableQuarterLayout;
-    }
-
     public toString(): string {
         return "QuarterLayout()";
     }

src/layouts/spreadlayout.ts

@@ -19,6 +19,10 @@
 // DEALINGS IN THE SOFTWARE.
 
 class SpreadLayout implements ILayout {
+    public get enabled(): boolean {
+        return Config.enableSpreadLayout;
+    }
+
     private space: number; /* in ratio */
 
     constructor() {
@@ -62,10 +66,6 @@ class SpreadLayout implements ILayout {
         return true;
     }
 
-    public isEnabled(): boolean {
-        return Config.enableSpreadLayout;
-    }
-
     public toString(): string {
         return "SpreadLayout(" + this.space + ")";
     }

src/layouts/stairlayout.ts

@@ -19,6 +19,10 @@
 // DEALINGS IN THE SOFTWARE.
 
 class StairLayout implements ILayout {
+    public get enabled(): boolean {
+        return Config.enableStairLayout;
+    }
+
     private space: number; /* in PIXELS */
 
     constructor() {
@@ -59,10 +63,6 @@ class StairLayout implements ILayout {
         return true;
     }
 
-    public isEnabled(): boolean {
-        return Config.enableStairLayout;
-    }
-
     public toString(): string {
         return "StairLayout(" + this.space + ")";
     }

src/layouts/tilelayout.ts

@@ -40,6 +40,10 @@ class TileLayout implements ILayout {
     public static readonly MinMasterRatio = 0.2;
     public static readonly MaxMasterRatio = 0.8;
 
+    public get enabled(): boolean {
+        return Config.enableTileLayout;
+    }
+
     private numMaster: number;
     private masterRatio: number; /* in ratio */
 
@@ -128,10 +132,6 @@ class TileLayout implements ILayout {
         return true;
     }
 
-    public isEnabled(): boolean {
-        return Config.enableTileLayout;
-    }
-
     public toString(): string {
         return "TileLayout(nmaster=" + this.numMaster + ", ratio=" + this.masterRatio + ")";
     }

src/layoutstore.ts

@@ -51,7 +51,7 @@ class LayoutStore {
 
             entry.push(layout);
 
-            if (entry[0].isEnabled())
+            if (entry[0].enabled)
                 break;
         }
     }