refactor(material/schematics): avoid addTypographyClass rule when not needed

The `addTypographyClass` rule is now fully conditional on the `typography`
option. This removes the need to execute the rule at all if the option is
disabled.

Author: clydin

src/material/schematics/ng-add/setup-project.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
-import {chain, Rule, SchematicContext, Tree} from '@angular-devkit/schematics';
+import {chain, noop, Rule, SchematicContext, Tree} from '@angular-devkit/schematics';
 import {getProjectFromWorkspace, getProjectStyleFile} from '@angular/cdk/schematics';
 import {getWorkspace} from '@schematics/angular/utility/workspace';
 import {ProjectType} from '@schematics/angular/utility/workspace-models';
@@ -29,7 +29,7 @@ export default function (options: Schema): Rule {
         addThemeToAppStyles(options),
         addFontsToIndex(options),
         addMaterialAppStyles(options),
-        addTypographyClass(options),
+        options.typography ? addTypographyClass(options) : noop(),
       ]);
     }
     context.logger.warn(

src/material/schematics/ng-add/theming/theming.ts

@@ -57,9 +57,7 @@ export function addTypographyClass(options: Schema): Rule {
       throw new SchematicsException('No project index HTML file could be found.');
     }
 
-    if (options.typography) {
-      projectIndexFiles.forEach(path => addBodyClass(host, path, 'mat-typography'));
-    }
+    projectIndexFiles.forEach(path => addBodyClass(host, path, 'mat-typography'));
   };
 }