Image-source modules refactoring

image-source/image-source.ios.ts

@@ -0,0 +1,100 @@
+import definition = require("image-source");
+import types = require("utils/types");
+import fs = require("file-system");
+import common = require("image-source/image-source-common");
+import enums = require("ui/enums");
+
+// merge the exports of the common file with the exports of this file
+declare var exports;
+require("utils/module-merge").merge(common, exports);
+
+export class ImageSource implements definition.ImageSource {
+    public android: android.graphics.Bitmap;
+    public ios: UIImage;
+
+    public loadFromResource(name: string): boolean {
+        this.ios = UIImage.imageNamed(name);
+        return this.ios != null;
+    }
+
+    public loadFromFile(path: string): boolean {
+        var fileName = types.isString(path) ? path.trim() : "";
+
+        if (fileName.indexOf("~/") === 0) {
+            fileName = fs.path.join(fs.knownFolders.currentApp().path, fileName.replace("~/", ""));
+        }
+
+        this.ios = UIImage.imageWithContentsOfFile(fileName);
+        return this.ios != null;
+    }
+
+    public loadFromData(data: any): boolean {
+        this.ios =  UIImage.imageWithData(data);
+        return this.ios != null;
+    }
+
+    public setNativeSource(source: any): boolean {
+        this.ios = source;
+        return source != null;
+    }
+
+    public saveToFile(path: string, format: string, quality?: number): boolean {
+        if (!this.ios) {
+            return false;
+        }
+
+        var data = getImageData(this.ios, format, quality);
+
+        if (data) {
+            return data.writeToFileAtomically(path, true);
+        }
+
+        return false;
+    }
+
+    public toBase64String(format: string, quality?: number): string {
+        var res = null;
+        if (!this.ios) {
+            return res;
+        }
+
+        var data = getImageData(this.ios, format, quality);
+
+        if (data) {
+            res = data.base64Encoding();
+        }
+
+        return res;
+
+    }
+
+    get height(): number {
+        if (this.ios) {
+            return this.ios.size.height;
+        }
+
+        return NaN;
+    }
+
+    get width(): number {
+        if (this.ios) {
+            return this.ios.size.width;
+        }
+
+        return NaN;
+    }
+}
+
+function getImageData(instance: UIImage, format: string, quality = 1.0): NSData {
+    var data = null;
+    switch (format) {
+        case enums.ImageFormat.png: // PNG
+            data = UIImagePNGRepresentation(instance);
+            break;
+        case enums.ImageFormat.jpeg: // JPEG
+            data = UIImageJPEGRepresentation(instance, quality);
+            break;
+
+    }
+    return data;
+}