Update plugin interface with some breaking changes

src/ios/APPPrinter.h

@@ -23,11 +23,12 @@
 
 @interface APPPrinter : CDVPlugin <UIPrintInteractionControllerDelegate>
 
-// Find out whether printing is supported on this platform
 - (void) check:(CDVInvokedUrlCommand *)command;
-// Displays system interface for selecting a printer
+
+- (void) utis:(CDVInvokedUrlCommand *)command;
+
 - (void) pick:(CDVInvokedUrlCommand *)command;
-// Prints the content
+
 - (void) print:(CDVInvokedUrlCommand *)command;
 
 @end

src/ios/APPPrinter.m

@@ -42,22 +42,30 @@
 - (void) check:(CDVInvokedUrlCommand *)command
 {
     [self.commandDelegate runInBackground:^{
-        BOOL res = NO;
+        BOOL res = [APPPrinterItem canPrintURL:command.arguments[0]];
-
-        if (command.arguments.count == 0)
-        {
-            res = UIPrintInteractionController.isPrintingAvailable;
-        }
-        else
-        {
-            res = [APPPrinterItem canPrintURL:command.arguments[0]];
-        }
 
         [self sendResultWithMessageAsBool:res
                                callbackId:command.callbackId];
     }];
 }
 
+/*
+ * List all printable document types (utis).
+ */
+- (void) utis:(CDVInvokedUrlCommand *)command
+{
+    [self.commandDelegate runInBackground:^{
+        NSSet *utis = UIPrintInteractionController.printableUTIs;
+
+        CDVPluginResult* result =
+        [CDVPluginResult resultWithStatus:CDVCommandStatus_OK
+                            messageAsArray:utis.allObjects];
+
+        [self.commandDelegate sendPluginResult:result
+                                    callbackId:command.callbackId];
+    }];
+}
+
 /**
  * Displays system interface for selecting a printer.
  */

src/ios/APPPrinterItem.h

@@ -23,6 +23,6 @@
 
 + (id) ItemFromURL:(NSString *)url;
 
-+ (BOOL) canPrintURL:(NSString *)url;
++ (BOOL) canPrintURL:(nullable NSString *)url;
 
 @end

src/ios/APPPrinterItem.m

@@ -45,9 +45,12 @@
  *
  * @return true if its able to render the content of the file.
  */
-+ (BOOL) canPrintURL:(NSString *)url
++ (BOOL) canPrintURL:(nullable NSString *)url
 {
-    if (![NSURL URLWithString:url]) return YES;
+    if (![NSURL URLWithString:url])
+    {
+        return UIPrintInteractionController.isPrintingAvailable;
+    }
 
     id item = [self ItemFromURL:url];
 

src/ios/APPPrinterUnit.h

@@ -21,6 +21,6 @@
 
 @interface APPPrinterUnit : NSObject
 
-+ (double) convert:(NSString *)unit;
++ (double) convert:(nullable NSString *)unit;
 
 @end

src/ios/APPPrinterUnit.m

@@ -23,8 +23,11 @@
 
 @implementation APPPrinterUnit
 
-+ (double) convert:(NSString *)unit
++ (double) convert:(nullable NSString *)unit
 {
+    if ([unit isEqual:[NSNull null]])
+        return 1.0;
+
     if ([unit isEqualToString:@"in"])
         return 72.0;
 

www/printer.js

@@ -1,6 +1,4 @@
 /*
-    Copyright 2013-2016 appPlant GmbH
-
  Licensed to the Apache Software Foundation (ASF) under one
  or more contributor license agreements.  See the NOTICE file
  distributed with this work for additional information
@@ -21,19 +19,14 @@
 
 var exec = require('cordova/exec');
 
-/**
+// Defaults
- * List of all available options with their default value.
+exports._defaults = {
- *
- * @return {Object}
- */
-exports.getDefaults = function () {
-    return {
     // name:      'unknown',
     // duplex:    'none',
     // landscape: false,
     // graystyle: false,
     // border:    true,
-        copies:    1,
+    // copies:    1,
 
     ui: {
         hideNumberOfCopies: false,
@@ -41,150 +34,188 @@ exports.getDefaults = function () {
         bounds: [40, 30, 0, 0]
     },
 
-        paper: {
+    // paper: {
-            unit: 'cm',
+    //     unit: 'cm',
-            height: 0,
+    //     height: 0,
-            width: 0,
+    //     width: 0,
-            length: 0
+    //     length: 0
-        },
+    // },
 
-        layout: {
+    // layout: {
-            unit: 'cm',
+    //     unit: 'cm',
-            maxHeight: 0,
+    //     maxHeight: 0,
-            maxWidth: 0,
+    //     maxWidth: 0,
-            padding: { top: 0, left: 0, right: 0, bottom: 0 }
+    //     padding: { top: 0, left: 0, right: 0, bottom: 0 }
-        },
+    // },
 
-        header: {
+    // header: {
-            unit: 'cm',
+    //     unit: 'cm',
-            height: 1,
+    //     height: 1,
 
-            labels: [{
+    //     labels: [{
-                text: 'Awesome Printer Plug-in',
+    //         text: 'Awesome Printer Plug-in',
-                style: {
+    //         style: {
-                    align: 'center',
+    //             align: 'center',
-                    italic: true,
+    //             italic: true,
-                    color: '#FF0000'
+    //             color: '#FF0000'
-                }
+    //         }
-            },{
+    //     },{
-                showPageIndex: true,
+    //         showPageIndex: true,
-                style: {
+    //         style: {
-                    align: 'right',
+    //             align: 'right',
-                    bold: true
+    //             bold: true
-                }
+    //         }
-            }]
+    //     }]
-        },
+    // },
 
-        footer: {
+    // footer: {
-            unit: 'mm',
+    //     unit: 'mm',
-            height: 3,
+    //     height: 3,
 
-            label: {
+    //     label: {
-                text: 'Copyright (c) 2013-2019 Sebastián Katzer',
+    //         text: 'Copyright (c) 2013-2019 Sebastián Katzer',
-                style: { size: 9 },
+    //         style: { size: 9 },
-                position: {
+    //         position: {
-                    unit: 'mm',
+    //             unit: 'mm',
-                    top: 1.5,
+    //             top: 1.5,
-                    right: 5
+    //             right: 5
-               }
+    //        }
-            }
+    //     }
-        }
+    // }
-    };
 };
 
 /**
- * Checks if the printer service is avaible (iOS)
+ * Test if the printer service is able to print
- * or if services are available (Android).
+ * the ressource specified by URL.
  *
- * @param {Function} callback
+ * @param [ String ]   uri      A file URI.
- *      A callback function
+ * @param [ Function ] callback The callback function.
- * @param {Object?} scope
+ * @param [ Object ]   scope    The scope for the function.
- *      The scope of the callback (default: window)
  *
- * @return {Boolean}
+ * @return [ Void ]
  */
-exports.check = function (callback, scope) {
+exports.canPrint = function (uri, callback, scope) {
-    var fn = this._createCallbackFn(callback);
 
-    exec(fn, null, 'Printer', 'check', []);
+    if (typeof uri == 'function') {
+        scope    = callback;
+        callback = uri;
+        uri      = null;
+    }
+
+    var fn = this._createCallbackFn(callback, scope);
+
+    exec(fn, null, 'Printer', 'check', [uri]);
 };
 
 /**
- * @deprecated API call. Use `check` instead!
+ * Returns a list of all printable document types.
+ *
+ * @param [ Function ] callback The callback function.
+ * @param [ Object ]   scope    The scope for the function.
+ *
+ * @return [ Void ]
  */
-exports.isAvailable = function () {
+exports.getPrintableUTIs = function (callback, scope) {
-    exports.check.apply(exports, arguments);
+    var fn = this._createCallbackFn(callback, scope);
+
+    exec(fn, null, 'Printer', 'utis', []);
 };
 
 /**
  * Displays system interface for selecting a printer.
  *
- * @param {Function} callback
+ * @param [ Object ]   options  Optional options.
- *      A callback function
+ * @param [ Function ] callback The callback function.
- * @param {Object} options
+ * @param [ Object ]   scope    The scope for the function.
- *       Options for the printer picker
+ *
+ * @return [ Void ]
  */
-exports.pick = function (callback, options) {
+exports.pick = function (options, callback, scope) {
-    var fn     = this._createCallbackFn(callback);
-    var params = options || {};
 
-    params = this.mergeWithDefaults(params);
+    if (typeof options == 'function') {
+        scope    = callback;
+        callback = options;
+        options  = {};
+    }
+
+    var fn     = this._createCallbackFn(callback, scope),
+        params = this._mergeWithDefaults(options || {});
 
     exec(fn, null, 'Printer', 'pick', [params]);
 };
 
 /**
- * Sends the content to the Printing Framework.
+ * Sends the content to the printer.
  *
- * @param {String} content
+ * @param [ String ]   content  The plain/html text or a file URI.
- *      HTML string or DOM node
+ * @param [ Object ]   options  Options for the print job.
- *      if latter, innerHTML is used to get the content
+ * @param [ Function ] callback The callback function.
- * @param {Object} options
+ * @param [ Object ]   scope    The scope for the function.
- *       Options for the print job
- * @param {Function?} callback
- *      A callback function
- * @param {Object?} scope
- *      The scope of the callback (default: window)
  */
 exports.print = function (content, options, callback, scope) {
-    var page   = content.innerHTML || content,
-        params = options || {},
-        fn     = this._createCallbackFn(callback);
 
-    if (typeof page != 'string') {
+    if (typeof content == 'function') {
-        console.log('Print function requires an HTML string. Not an object');
+        scope    = options;
-        return;
+        callback = content;
+        options  = {};
+        content  = null;
     }
 
-    if (typeof params == 'string') {
+    if (typeof options == 'function') {
-        params = { name: params };
+        scope    = callback;
+        callback = options;
+        options  = typeof content != 'string' ? content : {};
+        content  = typeof content == 'string' ? content : null;
     }
 
-    params = this.mergeWithDefaults(params);
+    var fn     = this._createCallbackFn(callback, scope),
+        params = this._mergeWithDefaults(options || {});
 
-    if ([null, undefined, ''].indexOf(params.name) > -1) {
+    exec(fn, null, 'Printer', 'print', [content, params]);
-        params.name = this.getDefaults().name;
-    }
-
-    exec(fn, null, 'Printer', 'print', [page, params]);
 };
 
 /**
- * @private
+ * The (platform specific) default settings.
  *
- * Merge settings with default values.
+ * @return [ Object ]
- *
- * @param {Object} options
- *      The custom options
- *
- * @retrun {Object}
- *      Default values merged
- *      with custom values
  */
-exports.mergeWithDefaults = function (options) {
+exports.getDefaults = function () {
+    var map = Object.assign({}, this._defaults);
+
+    for (var key in map) {
+        if (Array.isArray(map[key])) {
+            map[key] = Array.from(map[key]);
+        } else
+        if (Object.prototype.isPrototypeOf(map[key])) {
+            map[key] = Object.assign({}, map[key]);
+        }
+    }
+
+    return map;
+};
+
+/**
+ * Overwrite default settings.
+ *
+ * @param [ Object ] newDefaults New default values.
+ *
+ * @return [ Void ]
+ */
+exports.setDefaults = function (newDefaults) {
+    Object.assign(this._defaults, newDefaults);
+};
+
+/**
+ * Merge custom properties with the default values.
+ *
+ * @param [ Object ] options Set of custom values.
+ *
+ * @retrun [ Object ]
+ */
+exports._mergeWithDefaults = function (options) {
     var defaults = this.getDefaults();
 
-    if (options.bounds && !options.bounds.length) {
+    if (options.bounds && !Array.isArray(options.bounds)) {
         options.bounds = [
             options.bounds.left   || defaults.bounds[0],
             options.bounds.top    || defaults.bounds[1],
@@ -197,38 +228,144 @@ exports.mergeWithDefaults = function (options) {
         options.duplex = options.duplex ? 'long' : 'none';
     }
 
-    for (var key in defaults) {
+    Object.assign(defaults, options);
-        if (!options.hasOwnProperty(key)) {
-            options[key] = defaults[key];
-            continue;
-        }
 
-        if (typeof options[key] != typeof defaults[key]) {
+    for (var key in defaults) {
+        if (defaults[key] !== null) {
+            options[key] = defaults[key];
+        } else {
             delete options[key];
         }
     }
 
+    options.meta = {
+        plugin:  'cordova-plugin-printer',
+        version: '0.8.0-alpha'
+    };
+
     return options;
 };
 
 /**
  * @private
  *
- * Creates a callback, which will be executed within a specific scope.
+ * Creates a callback, which will be executed
+ * within a specific scope.
  *
- * @param {Function} callbackFn
+ * @param [ Function ] callback The callback function.
- *      The callback function
+ * @param [ Object ]   scope    The scope for the function.
- * @param {Object} scope
- *      The scope for the function
  *
- * @return {Function}
+ * @return [ Function ] The new callback function
- *      The new callback function
  */
-exports._createCallbackFn = function (callbackFn, scope) {
+exports._createCallbackFn = function (callback, scope) {
-    if (typeof callbackFn != 'function')
+
+    if (typeof callback !== 'function')
         return;
 
     return function () {
-        callbackFn.apply(scope || this, arguments);
+        callback.apply(scope || this, arguments);
     };
 };
+
+// Polyfill for Object.assign
+if (typeof Object.assign != 'function') {
+  Object.assign = function(target) {
+    'use strict';
+    if (target == null) {
+      throw new TypeError('Cannot convert undefined or null to object');
+    }
+
+    target = Object(target);
+    for (var index = 1; index < arguments.length; index++) {
+      var source = arguments[index];
+      if (source != null) {
+        for (var key in source) {
+          if (Object.prototype.hasOwnProperty.call(source, key)) {
+            target[key] = source[key];
+          }
+        }
+      }
+    }
+    return target;
+  };
+}
+
+// Polyfill for Array.from
+// Production steps of ECMA-262, Edition 6, 22.1.2.1
+// Reference: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-array.from
+if (!Array.from) {
+  Array.from = (function () {
+    var toStr = Object.prototype.toString;
+    var isCallable = function (fn) {
+      return typeof fn === 'function' || toStr.call(fn) === '[object Function]';
+    };
+    var toInteger = function (value) {
+      var number = Number(value);
+      if (isNaN(number)) { return 0; }
+      if (number === 0 || !isFinite(number)) { return number; }
+      return (number > 0 ? 1 : -1) * Math.floor(Math.abs(number));
+    };
+    var maxSafeInteger = Math.pow(2, 53) - 1;
+    var toLength = function (value) {
+      var len = toInteger(value);
+      return Math.min(Math.max(len, 0), maxSafeInteger);
+    };
+
+    // The length property of the from method is 1.
+    return function from(arrayLike/*, mapFn, thisArg */) {
+      // 1. Let C be the this value.
+      var C = this;
+
+      // 2. Let items be ToObject(arrayLike).
+      var items = Object(arrayLike);
+
+      // 3. ReturnIfAbrupt(items).
+      if (arrayLike == null) {
+        throw new TypeError("Array.from requires an array-like object - not null or undefined");
+      }
+
+      // 4. If mapfn is undefined, then let mapping be false.
+      var mapFn = arguments.length > 1 ? arguments[1] : void undefined;
+      var T;
+      if (typeof mapFn !== 'undefined') {
+        // 5. else
+        // 5. a If IsCallable(mapfn) is false, throw a TypeError exception.
+        if (!isCallable(mapFn)) {
+          throw new TypeError('Array.from: when provided, the second argument must be a function');
+        }
+
+        // 5. b. If thisArg was supplied, let T be thisArg; else let T be undefined.
+        if (arguments.length > 2) {
+          T = arguments[2];
+        }
+      }
+
+      // 10. Let lenValue be Get(items, "length").
+      // 11. Let len be ToLength(lenValue).
+      var len = toLength(items.length);
+
+      // 13. If IsConstructor(C) is true, then
+      // 13. a. Let A be the result of calling the [[Construct]] internal method of C with an argument list containing the single item len.
+      // 14. a. Else, Let A be ArrayCreate(len).
+      var A = isCallable(C) ? Object(new C(len)) : new Array(len);
+
+      // 16. Let k be 0.
+      var k = 0;
+      // 17. Repeat, while k < len… (also steps a - h)
+      var kValue;
+      while (k < len) {
+        kValue = items[k];
+        if (mapFn) {
+          A[k] = typeof T === 'undefined' ? mapFn(kValue, k) : mapFn.call(T, kValue, k);
+        } else {
+          A[k] = kValue;
+        }
+        k += 1;
+      }
+      // 18. Let putStatus be Put(A, "length", len, true).
+      A.length = len;
+      // 20. Return A.
+      return A;
+    };
+  }());
+}