public/assets/plugins/angular-pdf/dist/angular-pdf.js

   1 /*! Angular-PDF Version: 0.4.0 | (C) Sayanee Basu 2014, released under an MIT license */
   2 (function() {
   3
   4   'use strict';
   5
   6   angular.module('pdf', []).directive('ngPdf', ['$window', function($window) {
   7     return {
   8       restrict: 'E',
   9       templateUrl: function(element, attr) {
  10         return attr.templateUrl ? attr.templateUrl :
  11           'partials/viewer.html'
  12       },
  13       link: function(scope, element, attrs) {
  14         var url = attrs.pdfUrl,
  15           pdfDoc = null,
  16           pageNum = (attrs.page ? attrs.page : 1),
  17           scale = attrs.scale > 0 ? attrs.scale : 1,
  18           canvasArr = element.find('canvas');
  19         var canvas = canvasArr[0];
  20         var ctx = canvas.getContext('2d'),
  21           windowEl = angular.element($window);
  22
  23         windowEl.on('scroll', function() {
  24           scope.$apply(function() {
  25             scope.scroll = windowEl[0].scrollY;
  26           });
  27         });
  28
  29         PDFJS.disableWorker = true;
  30         scope.pageNum = pageNum;
  31
  32         scope.renderPage = function(num) {
  33           pdfDoc.getPage(num).then(function(page) {
  34             var viewport,
  35               pageWidthScale,
  36               pageHeightScale,
  37               renderContext = {},
  38               pageRendering;
  39
  40             if (attrs.scale === 'page-fit' && !scale) {
  41               viewport = page.getViewport(1);
  42               pageWidthScale = element[0].clientWidth /
  43                 viewport.width;
  44               pageHeightScale = element[0].clientHeight /
  45                 viewport.height;
  46               scale = Math.min(pageWidthScale, pageHeightScale);
  47             } else {
  48               viewport = page.getViewport(scale)
  49             }
  50
  51             canvas.height = viewport.height;
  52             canvas.width = viewport.width;
  53
  54             renderContext = {
  55               canvasContext: ctx,
  56               viewport: viewport
  57             };
  58
  59             page.render(renderContext).promise.then(function() {
  60               if (typeof scope.onPageRender === 'function') {
  61                 scope.onPageRender();
  62               }
  63             });
  64           });
  65         };
  66
  67         scope.goPrevious = function() {
  68           if (scope.pageToDisplay <= 1) {
  69             return;
  70           }
  71           scope.pageNum = parseInt(scope.pageNum) - 1;
  72         };
  73
  74         scope.goNext = function() {
  75           if (scope.pageToDisplay >= pdfDoc.numPages) {
  76             return;
  77           }
  78           scope.pageNum = parseInt(scope.pageNum) + 1;
  79         };
  80
  81         scope.zoomIn = function() {
  82           scale = parseFloat(scale) + 0.2;
  83           scope.renderPage(scope.pageToDisplay);
  84           return scale;
  85         };
  86
  87         scope.zoomOut = function() {
  88           scale = parseFloat(scale) - 0.2;
  89           scope.renderPage(scope.pageToDisplay);
  90           return scale;
  91         };
  92
  93         scope.changePage = function() {
  94           scope.renderPage(scope.pageToDisplay);
  95         };
  96
  97         scope.rotate = function() {
  98           if (canvas.getAttribute('class') === 'rotate0') {
  99             canvas.setAttribute('class', 'rotate90');
 100           } else if (canvas.getAttribute('class') === 'rotate90') {
 101             canvas.setAttribute('class', 'rotate180');
 102           } else if (canvas.getAttribute('class') === 'rotate180') {
 103             canvas.setAttribute('class', 'rotate270');
 104           } else {
 105             canvas.setAttribute('class', 'rotate0');
 106           }
 107         };
 108
 109         PDFJS.getDocument(url, null, null, scope.onProgress).then(
 110           function(_pdfDoc) {
 111             if (typeof scope.onLoad === 'function') {
 112               scope.onLoad();
 113             }
 114
 115             pdfDoc = _pdfDoc;
 116             scope.renderPage(scope.pageToDisplay);
 117
 118             scope.$apply(function() {
 119               scope.pageCount = _pdfDoc.numPages;
 120             });
 121           },
 122           function(error) {
 123             if (error) {
 124               if (typeof scope.onError === 'function') {
 125                 scope.onError(error);
 126               }
 127             }
 128           }
 129         );
 130
 131         scope.$watch('pageNum', function(newVal) {
 132           scope.pageToDisplay = parseInt(newVal);
 133           if (pdfDoc !== null) {
 134             scope.renderPage(scope.pageToDisplay);
 135           }
 136         });
 137
 138       }
 139     };
 140   }]);
 141
 142 })();