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index.android.ts
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index.android.ts
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// Definitions.
import { ImageSource as ImageSourceDefinition } from '.';
import { ImageAsset } from '../image-asset';
import * as httpModule from '../http';
// Types.
import { path as fsPath, knownFolders } from '../file-system';
import { isFileOrResourcePath, RESOURCE_PREFIX, layout } from '../utils';
import { getNativeApplication } from '../application';
import { Font } from '../ui/styling/font';
import { Color } from '../color';
import { getScaledDimensions } from './image-source-common';
export { isFileOrResourcePath };
let http: typeof httpModule;
function ensureHttp() {
if (!http) {
http = require('../http');
}
}
let application: android.app.Application;
let resources: android.content.res.Resources;
function getApplication() {
if (!application) {
application = <android.app.Application>getNativeApplication();
}
return application;
}
function getResources() {
if (!resources) {
resources = getApplication().getResources();
}
return resources;
}
export class ImageSource implements ImageSourceDefinition {
public android: android.graphics.Bitmap;
public ios: UIImage;
public get height(): number {
if (this.android) {
return this.android.getHeight();
}
return NaN;
}
public get width(): number {
if (this.android) {
return this.android.getWidth();
}
return NaN;
}
private _rotationAngle: number;
public get rotationAngle(): number {
return this._rotationAngle;
}
public set rotationAngle(value: number) {
this._rotationAngle = value;
}
constructor(nativeSource?: any) {
if (nativeSource) {
this.setNativeSource(nativeSource);
}
}
static fromAsset(asset: ImageAsset): Promise<ImageSource> {
return new Promise<ImageSource>((resolve, reject) => {
asset.getImageAsync((image, err) => {
if (image) {
resolve(new ImageSource(image));
} else {
reject(err);
}
});
});
}
static fromUrl(url: string): Promise<ImageSourceDefinition> {
ensureHttp();
return http.getImage(url);
}
static fromResourceSync(name: string): ImageSource {
const res = getResources();
if (res) {
const identifier: number = res.getIdentifier(name, 'drawable', getApplication().getPackageName());
if (0 < identifier) {
// Load BitmapDrawable with getDrawable to make use of Android internal caching
const bitmapDrawable = <android.graphics.drawable.BitmapDrawable>res.getDrawable(identifier);
if (bitmapDrawable && bitmapDrawable.getBitmap) {
return new ImageSource(bitmapDrawable.getBitmap());
}
}
}
return null;
}
static fromResource(name: string): Promise<ImageSource> {
return new Promise<ImageSource>((resolve, reject) => {
resolve(ImageSource.fromResourceSync(name));
});
}
static fromFileSync(path: string): ImageSource {
let fileName = typeof path === 'string' ? path.trim() : '';
if (fileName.indexOf('~/') === 0) {
fileName = fsPath.join(knownFolders.currentApp().path, fileName.replace('~/', ''));
}
const bitmap = android.graphics.BitmapFactory.decodeFile(fileName, null);
if (bitmap) {
const result = new ImageSource(bitmap);
result.rotationAngle = getRotationAngleFromFile(fileName);
return result;
} else {
return null;
}
}
static fromFile(path: string): Promise<ImageSource> {
return new Promise<ImageSource>((resolve, reject) => {
resolve(ImageSource.fromFileSync(path));
});
}
static fromFileOrResourceSync(path: string): ImageSource {
if (!isFileOrResourcePath(path)) {
throw new Error(`${path} is not a valid file or resource.`);
}
if (path.indexOf(RESOURCE_PREFIX) === 0) {
return ImageSource.fromResourceSync(path.substr(RESOURCE_PREFIX.length));
}
return ImageSource.fromFileSync(path);
}
static fromDataSync(data: any): ImageSource {
const bitmap = android.graphics.BitmapFactory.decodeStream(data);
return bitmap ? new ImageSource(bitmap) : null;
}
static fromData(data: any): Promise<ImageSource> {
return new Promise<ImageSource>((resolve, reject) => {
resolve(ImageSource.fromDataSync(data));
});
}
static fromBase64Sync(source: string): ImageSource {
let bitmap: android.graphics.Bitmap;
if (typeof source === 'string') {
const bytes = android.util.Base64.decode(source, android.util.Base64.DEFAULT);
bitmap = android.graphics.BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
}
return bitmap ? new ImageSource(bitmap) : null;
}
static fromBase64(source: string): Promise<ImageSource> {
return new Promise<ImageSource>((resolve, reject) => {
resolve(ImageSource.fromBase64Sync(source));
});
}
static fromFontIconCodeSync(source: string, font: Font, color: Color): ImageSource {
font = font || Font.default;
const paint = new android.graphics.Paint();
paint.setTypeface(font.getAndroidTypeface());
paint.setAntiAlias(true);
if (color) {
paint.setColor(color.android);
}
let fontSize = layout.toDevicePixels(font.fontSize);
if (!fontSize) {
// TODO: Consider making 36 font size as default for optimal look on TabView and ActionBar
fontSize = paint.getTextSize();
}
const density = layout.getDisplayDensity();
const scaledFontSize = fontSize * density;
paint.setTextSize(scaledFontSize);
const textBounds = new android.graphics.Rect();
paint.getTextBounds(source, 0, source.length, textBounds);
const textWidth = textBounds.width();
const textHeight = textBounds.height();
if (textWidth > 0 && textHeight > 0) {
const bitmap = android.graphics.Bitmap.createBitmap(textWidth, textHeight, android.graphics.Bitmap.Config.ARGB_8888);
const canvas = new android.graphics.Canvas(bitmap);
canvas.drawText(source, -textBounds.left, -textBounds.top, paint);
return new ImageSource(bitmap);
}
return null;
}
public fromAsset(asset: ImageAsset): Promise<ImageSource> {
console.log('fromAsset() is deprecated. Use ImageSource.fromAsset() instead.');
return ImageSource.fromAsset(asset).then((imgSource) => {
this.setNativeSource(imgSource.android);
return this;
});
}
public loadFromResource(name: string): boolean {
console.log('fromResource() and loadFromResource() are deprecated. Use ImageSource.fromResource[Sync]() instead.');
const imgSource = ImageSource.fromResourceSync(name);
this.android = imgSource ? imgSource.android : null;
return !!this.android;
}
public fromResource(name: string): Promise<boolean> {
return new Promise<boolean>((resolve, reject) => {
resolve(this.loadFromResource(name));
});
}
public loadFromFile(path: string): boolean {
console.log('fromFile() and loadFromFile() are deprecated. Use ImageSource.fromFile[Sync]() instead.');
const imgSource = ImageSource.fromFileSync(path);
this.android = imgSource ? imgSource.android : null;
return !!this.android;
}
public fromFile(path: string): Promise<boolean> {
return new Promise<boolean>((resolve, reject) => {
resolve(this.loadFromFile(path));
});
}
public loadFromData(data: any): boolean {
console.log('fromData() and loadFromData() are deprecated. Use ImageSource.fromData[Sync]() instead.');
const imgSource = ImageSource.fromDataSync(data);
this.android = imgSource ? imgSource.android : null;
return !!this.android;
}
public fromData(data: any): Promise<boolean> {
return new Promise<boolean>((resolve, reject) => {
resolve(this.loadFromData(data));
});
}
public loadFromBase64(source: string): boolean {
console.log('fromBase64() and loadFromBase64() are deprecated. Use ImageSource.fromBase64[Sync]() instead.');
const imgSource = ImageSource.fromBase64Sync(source);
this.android = imgSource ? imgSource.android : null;
return !!this.android;
}
public fromBase64(data: any): Promise<boolean> {
return new Promise<boolean>((resolve, reject) => {
resolve(this.loadFromBase64(data));
});
}
public loadFromFontIconCode(source: string, font: Font, color: Color): boolean {
console.log('loadFromFontIconCode() is deprecated. Use ImageSource.fromFontIconCodeSync() instead.');
const imgSource = ImageSource.fromFontIconCodeSync(source, font, color);
this.android = imgSource ? imgSource.android : null;
return !!this.android;
}
public setNativeSource(source: any): void {
if (source && !(source instanceof android.graphics.Bitmap)) {
throw new Error('The method setNativeSource() expects android.graphics.Bitmap instance.');
}
this.android = source;
}
public saveToFile(path: string, format: 'png' | 'jpeg' | 'jpg', quality = 100): boolean {
if (!this.android) {
return false;
}
const targetFormat = getTargetFormat(format);
// TODO add exception handling
const outputStream = new java.io.BufferedOutputStream(new java.io.FileOutputStream(path));
const res = this.android.compress(targetFormat, quality, outputStream);
outputStream.close();
return res;
}
public toBase64String(format: 'png' | 'jpeg' | 'jpg', quality = 100): string {
if (!this.android) {
return null;
}
const targetFormat = getTargetFormat(format);
const outputStream = new java.io.ByteArrayOutputStream();
const base64Stream = new android.util.Base64OutputStream(outputStream, android.util.Base64.NO_WRAP);
this.android.compress(targetFormat, quality, base64Stream);
base64Stream.close();
outputStream.close();
return outputStream.toString();
}
public resize(maxSize: number, options?: any): ImageSource {
const dim = getScaledDimensions(this.android.getWidth(), this.android.getHeight(), maxSize);
const bm: android.graphics.Bitmap = android.graphics.Bitmap.createScaledBitmap(this.android, dim.width, dim.height, options && options.filter);
return new ImageSource(bm);
}
}
function getTargetFormat(format: 'png' | 'jpeg' | 'jpg'): android.graphics.Bitmap.CompressFormat {
switch (format) {
case 'jpeg':
case 'jpg':
return android.graphics.Bitmap.CompressFormat.JPEG;
default:
return android.graphics.Bitmap.CompressFormat.PNG;
}
}
function getRotationAngleFromFile(filename: string): number {
let result = 0;
const ei = new android.media.ExifInterface(filename);
const orientation = ei.getAttributeInt(android.media.ExifInterface.TAG_ORIENTATION, android.media.ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case android.media.ExifInterface.ORIENTATION_ROTATE_90:
result = 90;
break;
case android.media.ExifInterface.ORIENTATION_ROTATE_180:
result = 180;
break;
case android.media.ExifInterface.ORIENTATION_ROTATE_270:
result = 270;
break;
}
return result;
}
export function fromAsset(asset: ImageAsset): Promise<ImageSource> {
console.log('fromAsset() is deprecated. Use ImageSource.fromAsset() instead.');
return ImageSource.fromAsset(asset);
}
export function fromResource(name: string): ImageSource {
console.log('fromResource() is deprecated. Use ImageSource.fromResourceSync() instead.');
return ImageSource.fromResourceSync(name);
}
export function fromFile(path: string): ImageSource {
console.log('fromFile() is deprecated. Use ImageSource.fromFileSync() instead.');
return ImageSource.fromFileSync(path);
}
export function fromData(data: any): ImageSource {
console.log('fromData() is deprecated. Use ImageSource.fromDataSync() instead.');
return ImageSource.fromDataSync(data);
}
export function fromFontIconCode(source: string, font: Font, color: Color): ImageSource {
console.log('fromFontIconCode() is deprecated. Use ImageSource.fromFontIconCodeSync() instead.');
return ImageSource.fromFontIconCodeSync(source, font, color);
}
export function fromBase64(source: string): ImageSource {
console.log('fromBase64() is deprecated. Use ImageSource.fromBase64Sync() instead.');
return ImageSource.fromBase64Sync(source);
}
export function fromNativeSource(nativeSource: any): ImageSource {
console.log('fromNativeSource() is deprecated. Use ImageSource constructor instead.');
return new ImageSource(nativeSource);
}
export function fromUrl(url: string): Promise<ImageSourceDefinition> {
console.log('fromUrl() is deprecated. Use ImageSource.fromUrl() instead.');
return ImageSource.fromUrl(url);
}
export function fromFileOrResource(path: string): ImageSource {
console.log('fromFileOrResource() is deprecated. Use ImageSource.fromFileOrResourceSync() instead.');
return ImageSource.fromFileOrResourceSync(path);
}