Merge pull request #303 from colkito/feature/qr-scanner-support

Feature/qr scanner support

bower.json

@@ -15,7 +15,8 @@
     "mocha": "~1.18.2",
     "chai": "~1.9.1",
     "crypto-js": "http://crypto-js.googlecode.com/files/CryptoJS%20v3.1.2.zip",
-    "sjcl":"1.0.0",
+    "sjcl": "1.0.0",
-    "file-saver": "*"
+    "file-saver": "*",
+    "qrcode-decoder-js": "*"
   }
 }

css/main.css

@@ -25,6 +25,7 @@ html, body {height: 100%;}
   padding: 5px 2rem;
   bottom: 0;
   width: 100%;
+  z-index: 100;
 }
 
 .bottom-copay {
@@ -427,3 +428,8 @@ a.loading {
   background: #fff;
 }
 
+#qr-canvas { display: none; }
+#qrcode-scanner-video {
+  display: block;
+  margin: 0 auto;
+}

index.html

@@ -462,13 +462,40 @@
             <form name="sendForm" ng-submit="submitForm(sendForm)" novalidate>
               <div class="row">
                 <div class="large-12 columns">
-                  <label for="address">To address
+                  <div class="row collapse">
-                    <small ng-hide="!sendForm.address.$pristine">required</small>
+                    <label for="address">To address
-                    <small class="is-valid" ng-show="!sendForm.address.$invalid && !sendForm.address.$pristine">valid!</small>
+                      <small ng-hide="!sendForm.address.$pristine || address">required</small>
-                    <small class="has-error" ng-show="sendForm.address.$invalid && !sendForm.address.$pristine">
+                      <small class="is-valid" ng-show="!sendForm.address.$invalid && address">valid!</small>
-                    not valid</small>
+                      <small class="has-error" ng-show="sendForm.address.$invalid && address">
-                  </label>
+                      not valid</small>
-                  <input type="text" id="address" name="address" placeholder="Send to" ng-model="address" valid-address required>
+                    </label>
+                    <div class="small-10 columns">
+                      <input type="text" id="address" name="address" placeholder="Send to" ng-model="address" valid-address required>
+                    </div>
+                    <div class="small-2 columns" ng-hide="showScanner">
+                      <a class="postfix button" ng-click="openScanner()"><i class="fi-camera"></i></a>
+                    </div>
+                    <div class="small-2 columns" ng-show="showScanner">
+                      <a class="postfix button alert" ng-click="cancelScanner()">Cancel</a>
+                    </div>
+                  </div>
+                  <div id="scanner" class="row" ng-if="showScanner">
+                    <div class="text-centered">
+                      <canvas id="qr-canvas" width="200" height="150"></canvas>
+                      <div ng-show="isMobile">
+                        <div id="file-input-wrapper" class="btn btn-primary">
+                          <span class="pull-left text-centered">
+                            <i class="glyphicon glyphicon-refresh icon-rotate"></i>
+                            Get QR code
+                          </span>
+                          <input id="qrcode-camera" type="file" capture="camera" accept="image/*">
+                        </div>
+                      </div>
+                      <div ng-hide="isMobile">
+                        <video id="qrcode-scanner-video" width="300" height="225" ng-hide="isMobile"></video>
+                      </div>
+                    </div>
+                  </div>
                 </div>
               </div>
 
@@ -556,6 +583,8 @@
     <script src="lib/file-saver/FileSaver.js"></script>
     <script src="lib/socket.io.js"></script>
     <script src="lib/sjcl.js"></script>
+    <script src="lib/ios-imagefile-megapixel/megapix-image.js"></script>
+    <script src="lib/qrcode-decoder-js/lib/qrcode-decoder.min.js"></script>
     <script src="js/copayBundle.js"></script>
 
     <script src="js/app.js"></script>

js/controllers/send.js

@@ -1,10 +1,42 @@
 'use strict';
 
 angular.module('copay.send').controller('SendController',
-  function($scope, $rootScope, $location) {
+  function($scope, $rootScope, $window, $location, $timeout) {
     $scope.title = 'Send';
     $scope.loading = false;
 
+    // Detect mobile devices
+    var isMobile = {
+      Android: function() {
+          return navigator.userAgent.match(/Android/i);
+      },
+      BlackBerry: function() {
+          return navigator.userAgent.match(/BlackBerry/i);
+      },
+      iOS: function() {
+          return navigator.userAgent.match(/iPhone|iPad|iPod/i);
+      },
+      Opera: function() {
+          return navigator.userAgent.match(/Opera Mini/i);
+      },
+      Windows: function() {
+          return navigator.userAgent.match(/IEMobile/i);
+      },
+      any: function() {
+          return (isMobile.Android() || isMobile.BlackBerry() || isMobile.iOS() || isMobile.Opera() || isMobile.Windows());
+      }
+    };
+
+    // Detect protocol
+    $scope.isHttp = function() {
+      var protocol = $window.location.protocol;
+      return (protocol.indexOf('http') === 0);
+    };
+
+    navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
+    window.URL = window.URL || window.webkitURL || window.mozURL || window.msURL;
+
+    $scope.isMobile = isMobile.any();
     $scope.unitIds = ['BTC','mBTC'];
     $scope.selectedUnit = $scope.unitIds[0];
 
@@ -32,6 +64,119 @@ angular.module('copay.send').controller('SendController',
       $scope.amount = null;
       form.address.$pristine = true;
       form.amount.$pristine = true;
+    };
 
+    // QR code Scanner
+    var cameraInput;
+    var video;
+    var canvas;
+    var $video;
+    var context;
+    var localMediaStream;
+
+    var _scan = function(evt) {
+      if ($scope.isMobile) {
+        $scope.scannerLoading = true;
+        var files = evt.target.files;
+
+        if (files.length === 1 && files[0].type.indexOf('image/') === 0) {
+          var file = files[0];
+
+          var reader = new FileReader();
+          reader.onload = (function(theFile) {
+            return function(e) {
+              var mpImg = new MegaPixImage(file);
+              mpImg.render(canvas, { maxWidth: 200, maxHeight: 200, orientation: 6 });
+
+              $timeout(function() {
+                qrcode.width = canvas.width;
+                qrcode.height = canvas.height;
+                qrcode.imagedata = context.getImageData(0, 0, qrcode.width, qrcode.height);
+
+                try {
+                  //alert(JSON.stringify(qrcode.process(context)));
+                  qrcode.decode();
+                } catch (e) {
+                  alert(e);
+                }
+              }, 1500);
+            };
+          })(file);
+
+          // Read  in the file as a data URL
+          reader.readAsDataURL(file);
+        }
+      } else {
+        if (localMediaStream) {
+          context.drawImage(video, 0, 0, 300, 225);
+
+          try {
+            qrcode.decode();
+          } catch(e) {
+            //qrcodeError(e);
+          }
+        }
+
+        $timeout(_scan, 500);
+      }
+    };
+
+    var _successCallback = function(stream) {
+      video.src = (window.URL && window.URL.createObjectURL(stream)) || stream;
+      localMediaStream = stream;
+      video.play();
+      $timeout(_scan, 1000);
+    };
+
+    var _scanStop = function() {
+      $scope.scannerLoading = false;
+      $scope.showScanner = false;
+      if (!$scope.isMobile) {
+        if (localMediaStream && localMediaStream.stop) localMediaStream.stop();
+        localMediaStream = null;
+        video.src = '';
+      }
+    };
+
+    var _videoError = function(err) {
+      console.log('Video Error: ' + JSON.stringify(err));
+      _scanStop();
+    };
+
+    qrcode.callback = function(data) {
+      _scanStop();
+
+      var str = (data.indexOf('bitcoin:') === 0) ? data.substring(8) : data;
+      console.log('QR code detected: ' + str);
+      $scope.$apply(function() {
+        $scope.address = str;
+      });
+    };
+
+    $scope.cancelScanner = function() {
+      _scanStop();
+    };
+
+    $scope.openScanner = function() {
+      $scope.showScanner = true;
+
+      // Wait a moment until the canvas shows
+      $timeout(function() {
+        canvas = document.getElementById('qr-canvas');
+        context = canvas.getContext('2d');
+
+        if ($scope.isMobile) {
+          cameraInput = document.getElementById('qrcode-camera');
+          cameraInput.addEventListener('change', _scan, false);
+        } else {
+          video = document.getElementById('qrcode-scanner-video');
+          $video = angular.element(video);
+          canvas.width = 300;
+          canvas.height = 225;
+          context.clearRect(0, 0, 300, 225);
+
+          navigator.getUserMedia({video: true}, _successCallback, _videoError);
+        }
+      }, 500);
     };
   });

lib/ios-imagefile-megapixel/megapix-image.js

@@ -0,0 +1,253 @@
+/**
+ * Mega pixel image rendering library for iOS6 Safari
+ *
+ * Fixes iOS6 Safari's image file rendering issue for large size image (over mega-pixel),
+ * which causes unexpected subsampling when drawing it in canvas.
+ * By using this library, you can safely render the image with proper stretching.
+ *
+ * Copyright (c) 2012 Shinichi Tomita <shinichi.tomita@gmail.com>
+ * Released under the MIT license
+ */
+(function() {
+
+  /**
+   * Detect subsampling in loaded image.
+   * In iOS, larger images than 2M pixels may be subsampled in rendering.
+   */
+  function detectSubsampling(img) {
+    var iw = img.naturalWidth, ih = img.naturalHeight;
+    if (iw * ih > 1024 * 1024) { // subsampling may happen over megapixel image
+      var canvas = document.createElement('canvas');
+      canvas.width = canvas.height = 1;
+      var ctx = canvas.getContext('2d');
+      ctx.drawImage(img, -iw + 1, 0);
+      // subsampled image becomes half smaller in rendering size.
+      // check alpha channel value to confirm image is covering edge pixel or not.
+      // if alpha value is 0 image is not covering, hence subsampled.
+      return ctx.getImageData(0, 0, 1, 1).data[3] === 0;
+    } else {
+      return false;
+    }
+  }
+
+  /**
+   * Detecting vertical squash in loaded image.
+   * Fixes a bug which squash image vertically while drawing into canvas for some images.
+   */
+  function detectVerticalSquash(img, iw, ih) {
+    var canvas = document.createElement('canvas');
+    canvas.width = 1;
+    canvas.height = ih;
+    var ctx = canvas.getContext('2d');
+    ctx.drawImage(img, 0, 0);
+    var data = ctx.getImageData(0, 0, 1, ih).data;
+    // search image edge pixel position in case it is squashed vertically.
+    var sy = 0;
+    var ey = ih;
+    var py = ih;
+    while (py > sy) {
+      var alpha = data[(py - 1) * 4 + 3];
+      if (alpha === 0) {
+        ey = py;
+      } else {
+        sy = py;
+      }
+      py = (ey + sy) >> 1;
+    }
+    var ratio = (py / ih);
+    return (ratio===0)?1:ratio;
+  }
+
+  /**
+   * Rendering image element (with resizing) and get its data URL
+   */
+  function renderImageToDataURL(img, options, doSquash) {
+    var canvas = document.createElement('canvas');
+    renderImageToCanvas(img, canvas, options, doSquash);
+    return canvas.toDataURL("image/jpeg", options.quality || 0.8);
+  }
+
+  /**
+   * Rendering image element (with resizing) into the canvas element
+   */
+  function renderImageToCanvas(img, canvas, options, doSquash) {
+    var iw = img.naturalWidth, ih = img.naturalHeight;
+    var width = options.width, height = options.height;
+    var ctx = canvas.getContext('2d');
+    ctx.save();
+    transformCoordinate(canvas, ctx, width, height, options.orientation);
+    var subsampled = detectSubsampling(img);
+    if (subsampled) {
+      iw /= 2;
+      ih /= 2;
+    }
+    var d = 1024; // size of tiling canvas
+    var tmpCanvas = document.createElement('canvas');
+    tmpCanvas.width = tmpCanvas.height = d;
+    var tmpCtx = tmpCanvas.getContext('2d');
+    var vertSquashRatio = doSquash ? detectVerticalSquash(img, iw, ih) : 1;
+    var dw = Math.ceil(d * width / iw);
+    var dh = Math.ceil(d * height / ih / vertSquashRatio);
+    var sy = 0;
+    var dy = 0;
+    while (sy < ih) {
+      var sx = 0;
+      var dx = 0;
+      while (sx < iw) {
+        tmpCtx.clearRect(0, 0, d, d);
+        tmpCtx.drawImage(img, -sx, -sy);
+        ctx.drawImage(tmpCanvas, 0, 0, d, d, dx, dy, dw, dh);
+        sx += d;
+        dx += dw;
+      }
+      sy += d;
+      dy += dh;
+    }
+    ctx.restore();
+    tmpCanvas = tmpCtx = null;
+  }
+
+  /**
+   * Transform canvas coordination according to specified frame size and orientation
+   * Orientation value is from EXIF tag
+   */
+  function transformCoordinate(canvas, ctx, width, height, orientation) {
+    switch (orientation) {
+      case 5:
+      case 6:
+      case 7:
+      case 8:
+        canvas.width = height;
+        canvas.height = width;
+        break;
+      default:
+        canvas.width = width;
+        canvas.height = height;
+    }
+    switch (orientation) {
+      case 2:
+        // horizontal flip
+        ctx.translate(width, 0);
+        ctx.scale(-1, 1);
+        break;
+      case 3:
+        // 180 rotate left
+        ctx.translate(width, height);
+        ctx.rotate(Math.PI);
+        break;
+      case 4:
+        // vertical flip
+        ctx.translate(0, height);
+        ctx.scale(1, -1);
+        break;
+      case 5:
+        // vertical flip + 90 rotate right
+        ctx.rotate(0.5 * Math.PI);
+        ctx.scale(1, -1);
+        break;
+      case 6:
+        // 90 rotate right
+        ctx.rotate(0.5 * Math.PI);
+        ctx.translate(0, -height);
+        break;
+      case 7:
+        // horizontal flip + 90 rotate right
+        ctx.rotate(0.5 * Math.PI);
+        ctx.translate(width, -height);
+        ctx.scale(-1, 1);
+        break;
+      case 8:
+        // 90 rotate left
+        ctx.rotate(-0.5 * Math.PI);
+        ctx.translate(-width, 0);
+        break;
+      default:
+        break;
+    }
+  }
+
+
+  /**
+   * MegaPixImage class
+   */
+  function MegaPixImage(srcImage) {
+    if (window.Blob && srcImage instanceof Blob) {
+      var img = new Image();
+      var URL = window.URL && window.URL.createObjectURL ? window.URL :
+                window.webkitURL && window.webkitURL.createObjectURL ? window.webkitURL :
+                null;
+      if (!URL) { throw Error("No createObjectURL function found to create blob url"); }
+      img.src = URL.createObjectURL(srcImage);
+      this.blob = srcImage;
+      srcImage = img;
+    }
+    if (!srcImage.naturalWidth && !srcImage.naturalHeight) {
+      var _this = this;
+      srcImage.onload = function() {
+        var listeners = _this.imageLoadListeners;
+        if (listeners) {
+          _this.imageLoadListeners = null;
+          for (var i=0, len=listeners.length; i<len; i++) {
+            listeners[i]();
+          }
+        }
+      };
+      this.imageLoadListeners = [];
+    }
+    this.srcImage = srcImage;
+  }
+
+  /**
+   * Rendering megapix image into specified target element
+   */
+  MegaPixImage.prototype.render = function(target, options) {
+    if (this.imageLoadListeners) {
+      var _this = this;
+      this.imageLoadListeners.push(function() { _this.render(target, options) });
+      return;
+    }
+    options = options || {};
+    var imgWidth = this.srcImage.naturalWidth, imgHeight = this.srcImage.naturalHeight,
+        width = options.width, height = options.height,
+        maxWidth = options.maxWidth, maxHeight = options.maxHeight,
+        doSquash = !this.blob || this.blob.type === 'image/jpeg';
+    if (width && !height) {
+      height = (imgHeight * width / imgWidth) << 0;
+    } else if (height && !width) {
+      width = (imgWidth * height / imgHeight) << 0;
+    } else {
+      width = imgWidth;
+      height = imgHeight;
+    }
+    if (maxWidth && width > maxWidth) {
+      width = maxWidth;
+      height = (imgHeight * width / imgWidth) << 0;
+    }
+    if (maxHeight && height > maxHeight) {
+      height = maxHeight;
+      width = (imgWidth * height / imgHeight) << 0;
+    }
+    var opt = { width : width, height : height };
+    for (var k in options) opt[k] = options[k];
+
+    var tagName = target.tagName.toLowerCase();
+    if (tagName === 'img') {
+      target.src = renderImageToDataURL(this.srcImage, opt, doSquash);
+    } else if (tagName === 'canvas') {
+      renderImageToCanvas(this.srcImage, target, opt, doSquash);
+    }
+    if (typeof this.onrender === 'function') {
+      this.onrender(target);
+    }
+  };
+
+  /**
+   * Export class to global
+   */
+  if (typeof define === 'function' && define.amd) {
+    define([], function() { return MegaPixImage; }); // for AMD loader
+  } else {
+    this.MegaPixImage = MegaPixImage;
+  }
+
+})();