mirror of
https://github.com/overleaf/overleaf.git
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487 lines
16 KiB
CoffeeScript
487 lines
16 KiB
CoffeeScript
define [
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"base"
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"ide/pdfng/directives/pdfTextLayer"
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"ide/pdfng/directives/pdfAnnotations"
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"ide/pdfng/directives/pdfHighlights"
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"ide/pdfng/directives/pdfRenderer"
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"ide/pdfng/directives/pdfPage"
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"ide/pdfng/directives/pdfSpinner"
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"libs/pdf" # needs pdfjs-1.0.712, override the path in require.js to get it
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], (
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App
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pdfTextLayer
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pdfAnnotations
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pdfHighlights
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pdfRenderer
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pdfPage
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pdfSpinner
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pdf
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) ->
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# App = angular.module 'pdfViewerApp', ['pdfPage', 'PDFRenderer', 'pdfHighlights']
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App.controller 'pdfViewerController', ['$scope', '$q', '$timeout', 'PDFRenderer', '$element', 'pdfHighlights', 'pdfSpinner', ($scope, $q, $timeout, PDFRenderer, $element, pdfHighlights, pdfSpinner) ->
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@load = () ->
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# $scope.pages = []
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$scope.document.destroy() if $scope.document?
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$scope.loadCount = $scope.loadCount? ? $scope.loadCount + 1 : 1
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# TODO need a proper url manipulation library to add to query string
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$scope.document = new PDFRenderer($scope.pdfSrc + '&pdfng=true' , {
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scale: 1,
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navigateFn: (ref) ->
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# this function captures clicks on the annotation links
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$scope.navigateTo = ref
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$scope.$apply()
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progressCallback: (progress) ->
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$scope.$emit 'progress', progress
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loadedCallback: () ->
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$scope.$emit 'loaded'
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errorCallback: (error) ->
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Raven.captureMessage?('pdfng error ' + error)
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$scope.$emit 'pdf:error', error
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pageSizeChangeCallback: (pageNum, deltaH) ->
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$scope.$broadcast 'pdf:page:size-change', pageNum, deltaH
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})
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# we will have all the main information needed to start display
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# after the following promise is resolved
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$scope.loaded = $q.all({
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numPages: $scope.document.getNumPages()
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# get size of first page as default @ scale 1
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pdfViewport: $scope.document.getPdfViewport 1, 1
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}).then (result) ->
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$scope.pdfViewport = result.pdfViewport
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$scope.pdfPageSize = [
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result.pdfViewport.height,
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result.pdfViewport.width
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]
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# console.log 'resolved q.all, page size is', result
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$scope.numPages = result.numPages
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@setScale = (scale, containerHeight, containerWidth) ->
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$scope.loaded.then () ->
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scale = {} if not scale?
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if containerHeight == 0 or containerWidth == 0
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numScale = 1
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else if scale.scaleMode == 'scale_mode_fit_width'
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# TODO make this dynamic
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numScale = (containerWidth - 40) / ($scope.pdfPageSize[1])
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else if scale.scaleMode == 'scale_mode_fit_height'
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# TODO magic numbers for jquery ui layout
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numScale = (containerHeight - 20) / ($scope.pdfPageSize[0])
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else if scale.scaleMode == 'scale_mode_value'
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numScale = scale.scale
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else if scale.scaleMode == 'scale_mode_auto'
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# TODO
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else
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scale.scaleMode = 'scale_mode_fit_width'
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numScale = (containerWidth - 40) / ($scope.pdfPageSize[1])
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# TODO
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$scope.scale.scale = numScale
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$scope.document.setScale(numScale)
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$scope.defaultPageSize = [
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numScale * $scope.pdfPageSize[0],
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numScale * $scope.pdfPageSize[1]
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]
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# console.log 'in setScale result', $scope.scale.scale, $scope.defaultPageSize
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@redraw = (position) ->
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# console.log 'in redraw'
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# console.log 'reseting pages array for', $scope.numPages
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$scope.pages = ({
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pageNum: i + 1
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} for i in [0 .. $scope.numPages-1])
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if position? && position.page?
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# console.log 'position is', position.page, position.offset
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# console.log 'setting current page', position.page
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pagenum = position.page
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if pagenum > $scope.numPages - 1
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pagenum = $scope.numPages - 1
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$scope.pages[pagenum].current = true
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$scope.pages[pagenum].position = position
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@zoomIn = () ->
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# console.log 'zoom in'
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newScale = $scope.scale.scale * 1.2
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$scope.forceScale = { scaleMode: 'scale_mode_value', scale: newScale }
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@zoomOut = () ->
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# console.log 'zoom out'
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newScale = $scope.scale.scale / 1.2
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$scope.forceScale = { scaleMode: 'scale_mode_value', scale: newScale }
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@fitWidth = () ->
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# console.log 'fit width'
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$scope.forceScale = { scaleMode: 'scale_mode_fit_width' }
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@fitHeight = () ->
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# console.log 'fit height'
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$scope.forceScale = { scaleMode: 'scale_mode_fit_height' }
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@checkPosition = () ->
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# console.log 'check position'
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$scope.forceCheck = ($scope.forceCheck || 0) + 1
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@showRandomHighlights = () ->
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# console.log 'show highlights'
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$scope.highlights = [
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{
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page: 3
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h: 100
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v: 100
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height: 30
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width: 200
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}
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]
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# we work with (pagenumber, % of height down page from top)
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# pdfListView works with (pagenumber, vertical position up page from
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# bottom measured in pts)
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@getPdfPosition = () ->
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# console.log 'in getPdfPosition'
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topPageIdx = 0
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topPage = $scope.pages[0]
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# find first visible page
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visible = $scope.pages.some (page, i) ->
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[topPageIdx, topPage] = [i, page] if page.visible
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if visible && topPage.element?
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# console.log 'found it', topPageIdx
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else
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# console.log 'CANNOT FIND TOP PAGE'
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return
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# console.log 'top page is', topPage.pageNum, topPage.elemTop, topPage.elemBottom, topPage
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top = topPage.element.offset().top
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bottom = top + topPage.element.innerHeight()
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viewportTop = $element.offset().top
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viewportBottom = viewportTop + $element.height()
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topVisible = (top >= viewportTop && top < viewportBottom)
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someContentVisible = (top < viewportTop && bottom > viewportTop)
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# console.log 'in PdfListView', top, topVisible, someContentVisible, viewportTop
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if topVisible
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canvasOffset = 0
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else if someContentVisible
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canvasOffset = viewportTop - top
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else
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canvasOffset = null
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# console.log 'pdfListview position = ', canvasOffset
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# instead of using promise, check if size is known and revert to
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# default otherwise
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# console.log 'looking up viewport', topPage.viewport, $scope.pdfViewport
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if topPage.viewport
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viewport = topPage.viewport
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pdfOffset = viewport.convertToPdfPoint(0, canvasOffset);
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else
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# console.log 'WARNING: had to default to global page size'
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viewport = $scope.pdfViewport
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scaledOffset = canvasOffset / $scope.scale.scale
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pdfOffset = viewport.convertToPdfPoint(0, scaledOffset);
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# console.log 'converted to offset = ', pdfOffset
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newPosition = {
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"page": topPageIdx,
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"offset" : { "top" : pdfOffset[1], "left": 0 }
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}
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return newPosition
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@computeOffset = (page, position) ->
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# console.log 'computing offset for', page, position
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element = page.element
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#console.log 'element =', $(element), 'parent =', $(element).parent()
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t1 = $(element).offset()?.top
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t2 = $(element).parent().offset()?.top
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if not (t1? and t2?)
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return $q((resolve, reject) -> reject('elements destroyed'))
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pageTop = $(element).offset().top - $(element).parent().offset().top
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# console.log('top of page scroll is', pageTop, 'vs', page.elemTop)
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# console.log('inner height is', $(element).innerHeight())
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currentScroll = $(element).parent().scrollTop()
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offset = position.offset
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# convert offset to pixels
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return $scope.document.getPdfViewport(page.pageNum).then (viewport) ->
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page.viewport = viewport
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pageOffset = viewport.convertToViewportPoint(offset.left, offset.top)
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# console.log 'addition offset =', pageOffset
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# console.log 'total', pageTop + pageOffset[1]
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Math.round(pageTop + pageOffset[1] + currentScroll) ## 10 is margin
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@setPdfPosition = (page, position) ->
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# console.log 'required pdf Position is', position
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@computeOffset(page, position).then (offset) ->
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$scope.pleaseScrollTo = offset
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$scope.position = position
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return this
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]
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App.directive 'pdfViewer', ['$q', '$timeout', 'pdfSpinner', ($q, $timeout, pdfSpinner) ->
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{
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controller: 'pdfViewerController'
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controllerAs: 'ctrl'
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scope: {
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"pdfSrc": "="
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"highlights": "="
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"position": "="
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"scale": "="
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"pleaseJumpTo": "="
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}
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template: """
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<div data-pdf-page class='pdf-page-container page-container' ng-repeat='page in pages'></div>
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"""
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link: (scope, element, attrs, ctrl) ->
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# console.log 'in pdfViewer element is', element
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# console.log 'attrs', attrs
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spinner = new pdfSpinner
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layoutReady = $q.defer()
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layoutReady.notify 'waiting for layout'
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layoutReady.promise.then () ->
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# console.log 'layoutReady was resolved'
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renderVisiblePages = () ->
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visiblePages = getVisiblePages()
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pages = getExtraPages visiblePages
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scope.document.renderPages(pages)
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getVisiblePages = () ->
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top = element[0].offsetTop
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bottom = top + element[0].clientHeight
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isVisible = (pageElement) ->
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pageTop = pageElement.offsetTop
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pageBottom = pageTop + pageElement.clientHeight
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return pageTop < bottom and pageBottom > top
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visiblePages = []
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for page in scope.pages
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page.visible = visible = isVisible(page.element[0])
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visiblePages.push page if visible
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return visiblePages
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getExtraPages = (visiblePages) ->
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extra = []
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firstVisiblePage = visiblePages[0].pageNum
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firstVisiblePageIdx = firstVisiblePage - 1
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len = visiblePages.length
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lastVisiblePage = visiblePages[len-1].pageNum
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lastVisiblePageIdx = lastVisiblePage - 1
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# first page after
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if lastVisiblePageIdx + 1 < scope.pages.length
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extra.push scope.pages[lastVisiblePageIdx + 1]
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# page before
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if firstVisiblePageIdx > 0
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extra.push scope.pages[firstVisiblePageIdx - 1]
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# second page after
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if lastVisiblePageIdx + 2 < scope.pages.length
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extra.push scope.pages[lastVisiblePageIdx + 2]
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return visiblePages.concat extra
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doRescale = (scale) ->
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# console.log 'doRescale', scale
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origposition = angular.copy scope.position
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# console.log 'origposition', origposition
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layoutReady.promise.then () ->
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[h, w] = [element.innerHeight(), element.width()]
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# console.log 'in promise', h, w
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ctrl.setScale(scale, h, w).then () ->
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spinner.remove(element)
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ctrl.redraw(origposition)
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$timeout renderVisiblePages, 0
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checkElementReady = () ->
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# if element is zero-sized keep checking until it is ready
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if element.height() == 0 or element.width() == 0
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$timeout () ->
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checkElementReady()
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, 250
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else
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scope.$broadcast 'layout-ready' if !scope.parentSize?
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checkElementReady()
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scope.$on 'layout-ready', () ->
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# console.log 'GOT LAYOUT READY EVENT'
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# console.log 'calling refresh'
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# updateContainer()
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spinner.add(element)
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layoutReady.resolve 'layout is ready'
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scope.parentSize = [
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element.innerHeight(),
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element.innerWidth()
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]
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scope.$emit 'flash-controls'
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#scope.$apply()
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scope.$on 'layout:main:resize', () ->
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# console.log 'GOT LAYOUT-MAIN-RESIZE EVENT'
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scope.parentSize = [
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element.innerHeight(),
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element.innerWidth()
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]
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scope.$apply()
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scope.$on 'layout:pdf:resize', () ->
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# console.log 'GOT LAYOUT-PDF-RESIZE EVENT'
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scope.parentSize = [
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element.innerHeight(),
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element.innerWidth()
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]
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#scope.$apply()
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scope.$on 'pdf:error', (event, error) ->
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return if error == 'cancelled'
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# check if too many retries or file is missing
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if scope.loadCount > 3 || error.match(/^Missing PDF/i)
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scope.$emit 'pdf:error:display'
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return
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ctrl.load()
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# trigger a redraw
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scope.scale = angular.copy (scope.scale)
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scope.$on 'pdf:page:size-change', (event, pageNum, delta) ->
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#console.log 'page size change event', pageNum, delta
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origposition = angular.copy scope.position
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#console.log 'orig position', JSON.stringify(origposition)
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if pageNum - 1 < origposition.page && delta != 0
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currentScrollTop = element.scrollTop()
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console.log 'adjusting scroll from', currentScrollTop, 'by', delta
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scope.adjustingScroll = true
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element.scrollTop(currentScrollTop + delta)
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element.on 'scroll', () ->
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#console.log 'scroll event', element.scrollTop(), 'adjusting?', scope.adjustingScroll
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#scope.scrollPosition = element.scrollTop()
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if scope.adjustingScroll
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renderVisiblePages()
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# updateContainer()
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scope.$apply()
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scope.adjustingScroll = false
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return
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#scope.scrolled = true
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if scope.scrollHandlerTimeout
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$timeout.cancel(scope.scrollHandlerTimeout)
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scope.scrollHandlerTimeout = $timeout scrollHandler, 25
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scrollHandler = () ->
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renderVisiblePages()
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#scope.$apply()
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newPosition = ctrl.getPdfPosition()
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if newPosition?
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scope.position = newPosition
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#scope.$apply()
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scope.scrollHandlerTimeout = null
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scope.$watch 'pdfSrc', (newVal, oldVal) ->
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# console.log 'loading pdf', newVal, oldVal
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return unless newVal?
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scope.loadCount = 0; # new pdf, so reset load count
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ctrl.load()
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# trigger a redraw
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scope.scale = angular.copy (scope.scale)
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scope.$watch 'scale', (newVal, oldVal) ->
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# no need to set scale when initialising, done in pdfSrc
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return if newVal == oldVal
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# console.log 'XXX calling Setscale in scale watch'
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doRescale newVal
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scope.$watch 'forceScale', (newVal, oldVal) ->
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# console.log 'got change in numscale watcher', newVal, oldVal
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return unless newVal?
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doRescale newVal
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# scope.$watch 'position', (newVal, oldVal) ->
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# console.log 'got change in position watcher', newVal, oldVal
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scope.$watch 'forceCheck', (newVal, oldVal) ->
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# console.log 'forceCheck', newVal, oldVal
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return unless newVal?
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scope.adjustingScroll = true # temporarily disable scroll
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doRescale scope.scale
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scope.$watch('parentSize', (newVal, oldVal) ->
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# console.log 'XXX in parentSize watch', newVal, oldVal
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# if newVal == oldVal
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# console.log 'returning because old and new are the same'
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# return
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return unless oldVal?
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# console.log 'XXX calling setScale in parentSize watcher'
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doRescale scope.scale
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, true)
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# scope.$watch 'elementWidth', (newVal, oldVal) ->
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# console.log '*** watch INTERVAL element width is', newVal, oldVal
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scope.$watch 'pleaseScrollTo', (newVal, oldVal) ->
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# console.log 'got request to ScrollTo', newVal, 'oldVal', oldVal
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return unless newVal?
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scope.adjustingScroll = true # temporarily disable scroll
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# handler while we reposition
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$(element).scrollTop(newVal)
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scope.pleaseScrollTo = undefined
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scope.$watch 'pleaseJumpTo', (newPosition, oldPosition) ->
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# console.log 'in pleaseJumpTo', newPosition, oldPosition
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return unless newPosition?
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ctrl.setPdfPosition scope.pages[newPosition.page-1], newPosition
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scope.$watch 'navigateTo', (newVal, oldVal) ->
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return unless newVal?
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# console.log 'got request to navigate to', newVal, 'oldVal', oldVal
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scope.navigateTo = undefined
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# console.log 'navigate to', newVal
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# console.log 'look up page num'
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scope.document.getDestination(newVal.dest).then (r) ->
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# console.log 'need to go to', r
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# console.log 'page ref is', r[0]
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scope.document.getPageIndex(r[0]).then (pidx) ->
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# console.log 'page num is', pidx
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page = scope.pages[pidx]
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scope.document.getPdfViewport(page.pageNum).then (viewport) ->
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#console.log 'got viewport', viewport
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coords = viewport.convertToViewportPoint r[2], r[3]
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#console.log 'viewport position', coords
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#console.log 'r is', r, 'r[1]', r[1], 'r[1].name', r[1].name
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if r[1].name == 'XYZ'
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#console.log 'XYZ:', r[2], r[3]
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newPosition = {page: pidx, offset: {top: r[3], left: r[2]}}
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ctrl.setPdfPosition scope.pages[pidx], newPosition # XXX?
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scope.$watch "highlights", (areas) ->
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# console.log 'got HIGHLIGHTS in pdfViewer', areas
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return if !areas?
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#console.log 'areas are', areas
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highlights = for area in areas or []
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{
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page: area.page - 1
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highlight:
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left: area.h
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top: area.v
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height: area.height
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width: area.width
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}
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#console.log 'highlights', highlights
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return if !highlights.length
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scope.$broadcast 'pdf:highlights', areas
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first = highlights[0]
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pageNum = scope.pages[first.page].pageNum
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scope.document.getPdfViewport(pageNum).then (viewport) ->
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position = {
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page: first.page
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offset:
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left: first.highlight.left
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top: viewport.viewBox[3] - first.highlight.top + first.highlight.height + 72
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}
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ctrl.setPdfPosition(scope.pages[first.page], position)
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scope.$watch '$destroy', () ->
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#console.log 'handle pdfng directive destroy'
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}
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]
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