mirror of
https://github.com/lxsang/antos-frontend.git
synced 2025-04-16 21:06:44 +02:00
119 lines
4.1 KiB
CoffeeScript
119 lines
4.1 KiB
CoffeeScript
class Preview extends this.OS.GUI.BaseApplication
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constructor: (args) ->
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super "Preview", args
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main: () ->
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me = @
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@currfile = @args[0].asFileHandler() if @args and @args.length > 0
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@view = @find "view"
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@status = @find "status"
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PDFJS.workerSrc = @_api.handler.get + "/#{@path()}/pdf.worker.js"
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@bindKey "ALT-O", () -> me.actionFile "#{me.name}-Open"
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@bindKey "CTRL-X", () -> me.actionFile "#{me.name}-Close"
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@open @currfile
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open: (file) ->
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me = @
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return unless file
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@currfile = file unless @currfile is file
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file.onready () ->
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file.info.size = (file.info.size / 1024).toFixed(2)
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me.renderFile file
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, (err) ->
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me.error "File not found #{file.path}"
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renderFile: (file) ->
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mime = file.info.mime
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return unless mime
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if mime.match /^[^\/]+\/.*pdf.*/g
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@renderPDF file
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else if mime.match /image\/.*/g
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@renderImage file
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else
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@notify "Mime type #{file.info.mime} is not support"
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setStatus: (t) ->
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($ @status).html t
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renderPDF: (file) ->
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me = @
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status = "#{file.info.name} (#{file.info.size} Kb)"
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($ me.view).empty()
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file.read (d) ->
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q = me._api.mid()
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me._api.loading q, "RENDERING"
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PDFJS.getDocument { data: d }
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#PDFJS.getDocument(url)
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.then (pdf) ->
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fn = (p) ->
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if p > pdf.numPages
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me.setStatus "#{status} - loaded"
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return me._api.loaded q, "OK"
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pdf.getPage(p).then (page) ->
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scale = 1.5
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viewport = page.getViewport scale
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div = ($ "<div/>").attr("id", "page-" + (page.pageIndex + 1))
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($ me.view).append div
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canvas = ($ "<canvas/>")[0]
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div.append canvas
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context = canvas.getContext '2d'
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canvas.height = viewport.height
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canvas.width = viewport.width
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renderContext =
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canvasContext: context
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viewport: viewport
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page.render renderContext
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me.setStatus "#{status} - #{p}/#{pdf.numPages} loaded"
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fn(p+1)
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fn(1)
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.catch (err) ->
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me.error "Cannot render the PDF file"
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me._api.loaded q, "FAIL"
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, "binary"
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renderImage: (file) ->
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me = @
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($ @view).attr("class", "image").empty()
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file.read (d) ->
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blob = new Blob [d], { type: file.mime }
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img = new Image()
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img.src = URL.createObjectURL blob
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canvas = ($ "<canvas/>")[0]
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($ me.view).append canvas
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#($ me.view).append img
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img.onload = () ->
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context = canvas.getContext '2d'
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canvas.height = img.height
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canvas.width = img.width
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console.log canvas.width, canvas.height
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context.drawImage img, 0, 0
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me.setStatus "#{file.info.name} (#{file.info.size} Kb) - #{img.width}x#{img.height}"
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, "binary"
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menu: () ->
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me = @
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menu = [{
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text: "File",
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child: [
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{ text: "Open", dataid: "#{@name}-Open", shortcut: "A-O" },
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{ text: "Close", dataid: "#{@name}-Close", shortcut: "C-X" },
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],
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onmenuselect: (e) -> me.actionFile e.item.data.dataid
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}]
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menu
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actionFile: (e) ->
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console.log e
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me = @
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switch e
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when "#{@name}-Open"
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@openDialog "FileDiaLog", ( d, f ) ->
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me.open "#{d}/#{f}".asFileHandler()
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, "Open file", { mimes: me.meta().mimes }
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when "#{@name}-Close"
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@quit()
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this.OS.register "Preview", Preview |