implemented QFontDatabase families method (#392)

* implemented QFontDatabase families method

* fixed linting

src/cpp/include/nodegui/QtGui/QFontDatabase/qfontdatabase_wrap.h

@@ -21,6 +21,7 @@ class DLL_EXPORT QFontDatabaseWrap
   QFontDatabase* getInternalInstance();
   // Wrapped methods
   Napi::Value bold(const Napi::CallbackInfo& info);
+  Napi::Value families(const Napi::CallbackInfo& info);
   Napi::Value italic(const Napi::CallbackInfo& info);
   Napi::Value weight(const Napi::CallbackInfo& info);
 };

src/cpp/lib/QtGui/QFontDatabase/qfontdatabase_wrap.cpp

@@ -12,6 +12,7 @@ Napi::Object QFontDatabaseWrap::init(Napi::Env env, Napi::Object exports) {
       {InstanceMethod("bold", &QFontDatabaseWrap::bold),
        InstanceMethod("italic", &QFontDatabaseWrap::italic),
        InstanceMethod("weight", &QFontDatabaseWrap::weight),
+       InstanceMethod("families", &QFontDatabaseWrap::families),
        StaticMethod("addApplicationFont",
                     &StaticQFontDatabaseWrapMethods::addApplicationFont),
        StaticMethod("removeApplicationFont",
@@ -34,6 +35,21 @@ QFontDatabase* QFontDatabaseWrap::getInternalInstance() {
   return this->instance.get();
 }
 
+Napi::Value QFontDatabaseWrap::families(const Napi::CallbackInfo& info) {
+  Napi::Env env = info.Env();
+  int writingSystem = 0;
+  if (info.Length() == 1) {
+    writingSystem = info[0].As<Napi::Number>().Int32Value();
+  }
+  QStringList families = this->instance->families(static_cast<QFontDatabase::WritingSystem>(writingSystem));
+  Napi::Array familiesNapi = Napi::Array::New(env, families.size());
+  for (int i = 0; i < families.size(); i++) {
+    familiesNapi[i] = Napi::String::New(env, families[i].toStdString());
+  }
+
+  return familiesNapi;
+}
+
 Napi::Value QFontDatabaseWrap::bold(const Napi::CallbackInfo& info) {
   Napi::Env env = info.Env();
   Napi::HandleScope scope(env);

src/lib/QtGui/QFontDatabase.ts

@@ -1,36 +1,6 @@
 import addon from '../utils/addon';
 import { Component, NativeElement } from '../core/Component';
 
-export class QFontDatabase extends Component {
-    native: NativeElement;
-    constructor() {
-        super();
-        this.native = new addon.QFontDatabase();
-    }
-    bold(family: string, style: string): boolean {
-        return this.native.bold(family, style);
-    }
-    italic(family: string, style: string): boolean {
-        return this.native.italic(family, style);
-    }
-    weight(family: string, style: string): number {
-        return this.native.weight(family, style);
-    }
-    static addApplicationFont(fileName: string): number {
-        return addon.QFontDatabase.addApplicationFont(fileName);
-    }
-    static removeApplicationFont(id: number): boolean {
-        return addon.QFontDatabase.removeApplicationFont(id);
-    }
-}
-
-export enum SystemFont {
-    GeneralFont,
-    FixedFont,
-    TitleFont,
-    SmallestReadableFont,
-}
-
 export enum WritingSystem {
     Any = 0,
     Latin = 1,
@@ -68,3 +38,36 @@ export enum WritingSystem {
     Runic = 32,
     Nko = 33,
 }
+
+export class QFontDatabase extends Component {
+    native: NativeElement;
+    constructor() {
+        super();
+        this.native = new addon.QFontDatabase();
+    }
+    families(ws: WritingSystem = WritingSystem.Any): string[] {
+        return this.native.families(ws);
+    }
+    bold(family: string, style: string): boolean {
+        return this.native.bold(family, style);
+    }
+    italic(family: string, style: string): boolean {
+        return this.native.italic(family, style);
+    }
+    weight(family: string, style: string): number {
+        return this.native.weight(family, style);
+    }
+    static addApplicationFont(fileName: string): number {
+        return addon.QFontDatabase.addApplicationFont(fileName);
+    }
+    static removeApplicationFont(id: number): boolean {
+        return addon.QFontDatabase.removeApplicationFont(id);
+    }
+}
+
+export enum SystemFont {
+    GeneralFont,
+    FixedFont,
+    TitleFont,
+    SmallestReadableFont,
+}

src/lib/QtGui/__tests__/QFontDatabase.test.ts

@@ -0,0 +1,15 @@
+import { QFontDatabase, WritingSystem } from '../QFontDatabase';
+
+describe('QFont', () => {
+    it('initialize empty', () => {
+        const fontDatabase = new QFontDatabase();
+        expect(fontDatabase).toBeTruthy();
+    });
+    it('families', () => {
+        const fontDatabase = new QFontDatabase();
+        expect(fontDatabase.native).toBeTruthy();
+        expect(fontDatabase.families).toBeTruthy();
+        expect(fontDatabase.families().length).toBeTruthy();
+        expect(fontDatabase.families(WritingSystem.Runic).length < fontDatabase.families().length).toBeTruthy();
+    });
+});