unserver-unify/src/components/pdfviewer/pdf-viewer.controller.js

angular.module("bamboo.course").service('pdfViewService', function($rootScope) {
  var _pdfurl = '';
  return {
    getpdfUrl: function() {
      return _pdfurl;
    },
    setpdfUrl: function(value) {
      _pdfurl = value;
      $rootScope.$broadcast('pdfurl:updated', value);
    },
    broadCastSizeUpdate: function() {
      $rootScope.$broadcast('pdfContailerChange');
    }
  }
}).controller("PdfViewerCtrl",  function($scope, $sce, pdfViewService,  ApiService, $stateParams) {
  var self = this;
  $scope.isLoading = false;
  $scope.downloadProgress = 0;
  $scope.pdfZoomLevels = [];
  $scope.pdfViewerAPI = {};
  $scope.pdfScale = 1;
  $scope.pdfURL = pdfViewService.getpdfUrl();
  $scope.pdfFile = null;
  $scope.pdfTotalPages = 0;
  $scope.pdfCurrentPage = 0;
  $scope.pdfSearchTerm = "";
  $scope.pdfSearchResultID = 0;
  $scope.pdfSearchNumOccurences = 0;
  this.lid = $stateParams.cid;
  this.videourl = ApiService.SHOST + '/lcourse/' + self.lid + '/resources/';
  self.findfitpage = false;
  self.findfitwidth = false;

  $scope.$on('pdfurl:updated', function(event, data) {
    $scope.loadPDF($scope.trustSrc(data));
  })
 
  $scope.onPDFProgress = function(operation, state, value, total, message) {
    //console.log("onPDFProgress(" + operation + ", " + state + ", " + value + ", " + total + ")");
    if (operation === "render" && value === 1) {
      if (state === "success") {
        //console.log($scope.pdfViewerAPI);
        if ($scope.pdfZoomLevels.length === 0) {
          // Read all the PDF zoom levels in order to populate the combobox...
          var lastScale = 0.1;
          do {
            var curScale = $scope.pdfViewerAPI.getNextZoomInScale(lastScale);
            if (curScale.value === lastScale) {
              break;
            }
            $scope.pdfZoomLevels.push(curScale);
            lastScale = curScale.value;
          } while (true);
        }
        //console.log($scope.pdfZoomLevels);
        //refresh the scale for fit-page and fit-width
        if ($scope.pdfViewerAPI.viewer.fitPageScale) {
          self.findfitpage = true;
          self.fitpagevalue = $scope.pdfViewerAPI.viewer.fitPageScale;
        } else {
          self.findfitpage = false;
        }
        if ($scope.pdfViewerAPI.viewer.fitWidthScale) {
          self.findfitwidth = true;
          self.fitwidthvalue = $scope.pdfViewerAPI.viewer.fitWidthScale;
        } else {
          self.findfitwidth = false;
        }
        $scope.pdfCurrentPage = 1;
        $scope.pdfTotalPages = $scope.pdfViewerAPI.getNumPages();
        $scope.pdfScale = $scope.pdfViewerAPI.getZoomLevel();
        $scope.isLoading = false;
        console.log($scope.pdfViewerAPI);
      } else {
        alert("Failed to render 1st page!\n\n" + message);
        $scope.isLoading = false;
      }
    } else if (operation === "download" && state === "loading") {
      $scope.downloadProgress = (value / total) * 100.0;
    } else {
      if (state === "failed") {
        alert("Something went really bad!\n\n" + message);
      }
    }
  };
  $scope.onPDFZoomLevelChanged = function() {
    $scope.pdfViewerAPI.zoomTo($scope.pdfScale);
  };
  self.fitpage = function() {
    // update fitpage scale
    if ($scope.pdfViewerAPI.viewer.fitPageScale) {
      self.findfitpage = true;
      $scope.pdfScale = self.fitpagevalue = $scope.pdfViewerAPI.viewer.fitPageScale;
      $scope.onPDFZoomLevelChanged();
    } else {
      self.findfitpage = false;
    }
  }
  self.fitwidth = function() {
    //update fitwidth scale
    if ($scope.pdfViewerAPI.viewer.fitWidthScale) {
      self.findfitwidth = true;
      $scope.pdfScale = self.fitwidthvalue = $scope.pdfViewerAPI.viewer.fitWidthScale;
      $scope.onPDFZoomLevelChanged();
    } else {
      self.findfitwidth = false;
    }
  }
  $scope.onPDFPageChanged = function() {
    $scope.pdfViewerAPI.goToPage($scope.pdfCurrentPage);
  };
  $scope.zoomIn = function() {
    var nextScale = $scope.pdfViewerAPI.getNextZoomInScale($scope.pdfScale);
    $scope.pdfViewerAPI.zoomTo(nextScale.value);
    $scope.pdfScale = nextScale.value;
    //console.log(nextScale);
  };
  $scope.zoomOut = function() {
    var nextScale = $scope.pdfViewerAPI.getNextZoomOutScale($scope.pdfScale);
    $scope.pdfViewerAPI.zoomTo(nextScale.value);
    $scope.pdfScale = nextScale.value;
    //console.log(nextScale);
  };
  $scope.loadPDF = function(pdfURL) {
    if ($scope.pdfURL === pdfURL) {
      return;
    }
    $scope.isLoading = true;
    $scope.downloadProgress = 0;
    $scope.pdfZoomLevels = [];
    $scope.pdfSearchTerm = "";
    $scope.pdfFile = null;
    $scope.pdfURL = pdfURL;
  };
  $scope.findNext = function() {
    $scope.pdfViewerAPI.findNext();
  };
  $scope.findPrev = function() {
    $scope.pdfViewerAPI.findPrev();
  };
  $scope.onPDFFileChanged = function() {
    $scope.isLoading = true;
    $scope.downloadProgress = 0;
    $scope.pdfZoomLevels = [];
    $scope.pdfSearchTerm = "";
    $scope.$apply(function() {
      $scope.pdfURL = "";
      $scope.pdfFile = document.getElementById('file_input').files[0];
    });
  };
  $scope.onPDFPassword = function(reason) {
    return prompt("The selected PDF is password protected. PDF.js reason: " + reason, "");
  };
  //		$scope.printPDF = function () {
  //			$scope.pdfViewerAPI.print();
  //		};
  $scope.trustSrc = function(src) {
    return $sce.trustAsResourceUrl(src);
  };
  $scope.onPDFEnd = function() {
    console.log('End');
    $scope.$emit('pdf-end');
  };
  $scope.loadPDF($scope.trustSrc(pdfViewService.getpdfUrl()));
});