overleaf/services/web/public/coffee/ide/pdfng/directives/pdfViewer.js

// Generated by CoffeeScript 1.8.0
(function() {
  var app;

  app = angular.module('pdfViewerApp', ['pdfPage', 'PDFRenderer', 'pdfHighlights']);

  app.controller('pdfViewerController', [
    '$scope', '$q', 'PDFRenderer', '$element', 'pdfHighlights', function($scope, $q, PDFRenderer, $element, pdfHighlights) {
      this.load = function() {
        $scope.document = new PDFRenderer($scope.pdfSrc, {
          scale: 1,
          navigateFn: function(ref) {
            $scope.navigateTo = ref;
            return $scope.$apply();
          }
        });
        return $scope.loaded = $q.all({
          numPages: $scope.document.getNumPages(),
          destinations: $scope.document.getDestinations(),
          pdfViewport: $scope.document.getPdfViewport(1, 1)
        }).then(function(result) {
          $scope.pdfViewport = result.pdfViewport;
          $scope.pdfPageSize = [result.pdfViewport.height, result.pdfViewport.width];
          $scope.destinations = result.destinations;
          console.log('resolved q.all, page size is', result);
          return $scope.numPages = result.numPages;
        });
      };
      this.setScale = function(scale, containerHeight, containerWidth) {
        return $scope.loaded.then(function() {
          var numScale;
          if (scale == null) {
            scale = {};
          }
          if (scale.scaleMode === 'scale_mode_fit_width') {
            numScale = (containerWidth - 40) / $scope.pdfPageSize[1];
          } else if (scale.scaleMode === 'scale_mode_fit_height') {
            numScale = (containerHeight - 20) / $scope.pdfPageSize[0];
          } else if (scale.scaleMode === 'scale_mode_value') {
            numScale = scale.scale;
          } else if (scale.scaleMode === 'scale_mode_auto') {

          } else {
            scale.scaleMode = 'scale_mode_fit_width';
            numScale = (containerWidth - 40) / $scope.pdfPageSize[1];
          }
          $scope.scale.scale = numScale;
          $scope.document.setScale(numScale);
          $scope.defaultPageSize = [numScale * $scope.pdfPageSize[0], numScale * $scope.pdfPageSize[1]];
          return console.log('in setScale result', $scope.scale.scale, $scope.defaultPageSize);
        });
      };
      this.redraw = function(position) {
        var i, pagenum;
        console.log('in redraw');
        console.log('reseting pages array for', $scope.numPages);
        console.log('position is', position.page, position.offset);
        $scope.pages = (function() {
          var _i, _ref, _results;
          _results = [];
          for (i = _i = 0, _ref = $scope.numPages - 1; 0 <= _ref ? _i <= _ref : _i >= _ref; i = 0 <= _ref ? ++_i : --_i) {
            _results.push({
              pageNum: i + 1
            });
          }
          return _results;
        })();
        if ((position != null) && (position.page != null)) {
          console.log('setting current page', position.page);
          pagenum = position.page;
          $scope.pages[pagenum].current = true;
          return $scope.pages[pagenum].position = position;
        }
      };
      this.zoomIn = function() {
        var newScale;
        console.log('zoom in');
        newScale = $scope.scale.scale * 1.2;
        return $scope.forceScale = {
          scaleMode: 'scale_mode_value',
          scale: newScale
        };
      };
      this.zoomOut = function() {
        var newScale;
        console.log('zoom out');
        newScale = $scope.scale.scale / 1.2;
        return $scope.forceScale = {
          scaleMode: 'scale_mode_value',
          scale: newScale
        };
      };
      this.fitWidth = function() {
        console.log('fit width');
        return $scope.forceScale = {
          scaleMode: 'scale_mode_fit_width'
        };
      };
      this.fitHeight = function() {
        console.log('fit height');
        return $scope.forceScale = {
          scaleMode: 'scale_mode_fit_height'
        };
      };
      this.checkPosition = function() {
        console.log('check position');
        return $scope.forceCheck = ($scope.forceCheck || 0) + 1;
      };
      this.showRandomHighlights = function() {
        console.log('show highlights');
        return $scope.highlights = [
          {
            page: 3,
            h: 100,
            v: 100,
            height: 30,
            width: 200
          }
        ];
      };
      this.getPdfPosition = function() {
        var bottom, canvasOffset, newPosition, pdfOffset, scaledOffset, someContentVisible, top, topPage, topVisible, viewport, viewportHeight, viewportTop, visible;
        console.log('in getPdfPosition');
        visible = function(page, i) {
          var topPage, topPageIdx;
          if (page.visible) {
            topPageIdx = i;
            return topPage = page;
          }
        };
        if ($scope.pages.some(visible)) {
          topPage = visiblePages[0];
        } else {
          console.log('CANNOT FIND TOP PAGE');
          topPage = $scope.pages[0];
        }
        console.log('top page is', topPage.pageNum, topPage.elemTop, topPage.elemBottom, topPage);
        top = topPage.elemTop;
        bottom = topPage.elemBottom;
        viewportTop = 0;
        viewportHeight = $element.height();
        topVisible = top >= viewportTop && top < viewportTop + viewportHeight;
        someContentVisible = top < viewportTop && bottom > viewportTop;
        console.log('in PdfListView', top, topVisible, someContentVisible, viewportTop);
        if (topVisible) {
          canvasOffset = 0;
        } else if (someContentVisible) {
          canvasOffset = viewportTop - top;
        } else {
          canvasOffset = null;
        }
        console.log('pdfListview position = ', canvasOffset);
        console.log('looking up viewport', topPage.viewport, $scope.pdfViewport);
        if (topPage.viewport) {
          viewport = topPage.viewport;
          pdfOffset = viewport.convertToPdfPoint(0, canvasOffset);
        } else {
          console.log('WARNING: had to default to global page size');
          viewport = $scope.pdfViewport;
          scaledOffset = canvasOffset / $scope.scale.scale;
          pdfOffset = viewport.convertToPdfPoint(0, scaledOffset);
        }
        console.log('converted to offset = ', pdfOffset);
        newPosition = {
          "page": topPage.pageNum,
          "offset": {
            "top": pdfOffset[1],
            "left": 0
          }
        };
        return newPosition;
      };
      this.computeOffset = function(page, position) {
        var currentScroll, element, offset, pageTop;
        console.log('computing offset for', page, position);
        element = page.element;
        pageTop = $(element).offset().top - $(element).parent().offset().top;
        console.log('top of page scroll is', pageTop, 'vs', page.elemTop);
        console.log('inner height is', $(element).innerHeight());
        currentScroll = $(element).parent().scrollTop();
        offset = position.offset;
        return $scope.document.getPdfViewport(page.pageNum).then(function(viewport) {
          var pageOffset;
          page.viewport = viewport;
          pageOffset = viewport.convertToViewportPoint(offset.left, offset.top);
          console.log('addition offset =', pageOffset);
          console.log('total', pageTop + pageOffset[1]);
          return Math.round(pageTop + pageOffset[1] + currentScroll);
        });
      };
      this.setPdfPosition = function(page, position) {
        console.log('required pdf Position is', position);
        return this.computeOffset(page, position).then(function(offset) {
          $scope.pleaseScrollTo = offset;
          return $scope.position = position;
        });
      };
      return this;
    }
  ]);

  app.directive('pdfViewer', [
    '$q', '$timeout', function($q, $timeout) {
      return {
        controller: 'pdfViewerController',
        controllerAs: 'ctrl',
        scope: {
          "pdfSrc": "=",
          "highlights": "=",
          "position": "=",
          "scale": "=",
          "dblClickCallback": "=",
          "pleaseJumpTo": "="
        },
        template: "<div data-pdf-page class='pdf-page-container page-container' ng-repeat='page in pages'></div>",
        link: function(scope, element, attrs, ctrl) {
          var doRescale, layoutReady, updateContainer;
          console.log('in pdfViewer element is', element);
          console.log('attrs', attrs);
          layoutReady = $q.defer();
          layoutReady.notify('waiting for layout');
          layoutReady.promise.then(function() {
            return console.log('layoutReady was resolved');
          });
          updateContainer = function() {
            return scope.containerSize = [element.innerWidth(), element.innerHeight(), element.offset().top];
          };
          doRescale = function(scale) {
            var origposition;
            console.log('doRescale', scale);
            origposition = angular.copy(scope.position);
            console.log('origposition', origposition);
            return layoutReady.promise.then(function() {
              var h, w, _ref;
              _ref = [element.innerHeight(), element.width()], h = _ref[0], w = _ref[1];
              console.log('in promise', h, w);
              return ctrl.setScale(scale, h, w).then(function() {
                return ctrl.redraw(origposition);
              });
            });
          };
          scope.$on('layout-ready', function() {
            console.log('GOT LAYOUT READY EVENT');
            console.log('calling refresh');
            updateContainer();
            layoutReady.resolve('layout is ready');
            return scope.parentSize = [element.innerHeight(), element.innerWidth()];
          });
          scope.$on('layout:pdf:resize', function() {
            console.log('GOT LAYOUT-RESIZE EVENT');
            return scope.parentSize = [element.innerHeight(), element.innerWidth()];
          });
          element.on('scroll', function() {
            console.log('scroll detected', scope.adjustingScroll);
            updateContainer();
            scope.$apply();
            if (scope.adjustingScroll) {
              scope.adjustingScroll = false;
              return;
            }
            scope.position = ctrl.getPdfPosition();
            console.log('position is', scope.position.page, scope.position.offset);
            return scope.$apply();
          });
          scope.$watch('pdfSrc', function(newVal, oldVal) {
            console.log('loading pdf', newVal, oldVal);
            if (newVal == null) {
              return;
            }
            ctrl.load();
            return doRescale(scope.scale);
          });
          scope.$watch('scale', function(newVal, oldVal) {
            if (newVal === oldVal) {
              return;
            }
            console.log('XXX calling Setscale in scale watch');
            return doRescale(newVal);
          });
          scope.$watch('forceScale', function(newVal, oldVal) {
            console.log('got change in numscale watcher', newVal, oldVal);
            if (newVal == null) {
              return;
            }
            return doRescale(newVal);
          });
          scope.$watch('position', function(newVal, oldVal) {
            return console.log('got change in position watcher', newVal, oldVal);
          });
          scope.$watch('forceCheck', function(newVal, oldVal) {
            console.log('forceCheck', newVal, oldVal);
            if (newVal == null) {
              return;
            }
            scope.adjustingScroll = true;
            return doRescale(scope.scale);
          });
          scope.$watch('parentSize', function(newVal, oldVal) {
            console.log('XXX in parentSize watch', newVal, oldVal);
            if (newVal === oldVal) {
              console.log('returning because old and new are the same');
              return;
            }
            if (oldVal == null) {
              return;
            }
            console.log('XXX calling setScale in parentSize watcher');
            return doRescale(scope.scale);
          }, true);
          scope.$watch('elementWidth', function(newVal, oldVal) {
            return console.log('*** watch INTERVAL element width is', newVal, oldVal);
          });
          scope.$watch('pleaseScrollTo', function(newVal, oldVal) {
            console.log('got request to ScrollTo', newVal, 'oldVal', oldVal);
            if (newVal == null) {
              return;
            }
            scope.adjustingScroll = true;
            $(element).scrollTop(newVal);
            return scope.pleaseScrollTo = void 0;
          });
          scope.$watch('pleaseJumpTo', function(newPosition, oldPosition) {
            console.log('in pleaseJumpTo', newPosition, oldPosition);
            if (newPosition == null) {
              return;
            }
            return ctrl.setPdfPosition(scope.pages[newPosition.page - 1], newPosition);
          });
          scope.$watch('navigateTo', function(newVal, oldVal) {
            if (newVal == null) {
              return;
            }
            console.log('got request to navigate to', newVal, 'oldVal', oldVal);
            scope.navigateTo = void 0;
            console.log('navigate to', newVal);
            console.log('look up page num');
            return scope.loaded.then(function() {
              var r;
              console.log('destinations are', scope.destinations);
              r = scope.destinations[newVal.dest];
              console.log('need to go to', r);
              console.log('page ref is', r[0]);
              return scope.document.getPageIndex(r[0]).then(function(pidx) {
                console.log('page num is', pidx);
                return scope.document.getPdfViewport(pidx).then(function(viewport) {
                  var coords, newPosition;
                  console.log('got viewport', viewport);
                  coords = viewport.convertToViewportPoint(r[2], r[3]);
                  console.log('viewport position', coords);
                  console.log('r is', r, 'r[1]', r[1], 'r[1].name', r[1].name);
                  if (r[1].name === 'XYZ') {
                    console.log('XYZ:', r[2], r[3]);
                    newPosition = {
                      page: pidx,
                      offset: {
                        top: r[3],
                        left: r[2]
                      }
                    };
                    return ctrl.setPdfPosition(scope.pages[pidx], newPosition);
                  }
                });
              });
            });
          });
          return scope.$watch("highlights", function(areas) {
            var area, first, highlights;
            console.log('got HIGHLIGHTS in pdfViewer', areas);
            if (areas == null) {
              return;
            }
            console.log('areas are', areas);
            highlights = (function() {
              var _i, _len, _ref, _results;
              _ref = areas || [];
              _results = [];
              for (_i = 0, _len = _ref.length; _i < _len; _i++) {
                area = _ref[_i];
                _results.push({
                  page: area.page - 1,
                  highlight: {
                    left: area.h,
                    top: area.v,
                    height: area.height,
                    width: area.width
                  }
                });
              }
              return _results;
            })();
            console.log('highlights', highlights);
            if (!highlights.length) {
              return;
            }
            first = highlights[0];
            return scope.document.getPdfViewport(first.page).then(function(viewport) {
              var position;
              position = {
                page: first.page,
                offset: {
                  left: first.highlight.left,
                  top: viewport.viewBox[3] - first.highlight.top + first.highlight.height + 72
                }
              };
              return ctrl.setPdfPosition(scope.pages[first.page], position);
            });
          });
        }
      };
    }
  ]);

}).call(this);