antosdk-apps/Preview/main.coffee

166 lines
5.6 KiB
CoffeeScript
Raw Normal View History

# Copyright 2017-2018 Xuan Sang LE <xsang.le AT gmail DOT com>
# AnTOS Web desktop is is licensed under the GNU General Public
# License v3.0, see the LICENCE file for more information
# This program is free software: you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation, either version 3 of
# the License, or (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
# You should have received a copy of the GNU General Public License
#along with this program. If not, see https://www.gnu.org/licenses/.
2020-06-05 17:45:07 +02:00
class Preview extends this.OS.application.BaseApplication
constructor: (args) ->
super "Preview", args
main: () ->
2020-05-21 21:56:16 +02:00
@currfile = undefined
@currfile = @args[0].path.asFileHandle() if @args and @args.length > 0
@view = @find "view"
@status = @find "status"
2020-05-21 21:56:16 +02:00
@zoom = @find "zoom"
@btreset = @find "btreset"
2020-06-05 17:45:07 +02:00
@zoom.onvaluechange = (e) => @setViewScale e.data
2020-05-21 21:56:16 +02:00
2020-06-05 17:45:07 +02:00
@btreset.onbtclick = (e) =>
@zoom.value = 100
2020-05-21 21:56:16 +02:00
@setViewScale 100
2021-02-11 14:49:19 +01:00
2020-05-21 21:56:16 +02:00
@img = undefined
@bindKey "ALT-O", () => @actionFile "#{@name}-Open"
@bindKey "CTRL-X", () => @actionFile "#{@name}-Close"
2020-06-05 17:45:07 +02:00
@zoom.max = 200
@zoom.value = 100
@open @currfile
open: (file) ->
return unless file
@currfile = file unless @currfile is file
file.onready().then () =>
file.info.size = (file.info.size / 1024).toFixed(2)
2020-05-21 21:56:16 +02:00
@renderFile()
.catch (err) =>
@error __("File not found {0}", file.path), err
2020-05-21 21:56:16 +02:00
renderFile: () ->
mime = @currfile.info.mime
return unless mime
2020-05-21 21:56:16 +02:00
@img = undefined
($ @view).empty()
2020-06-05 17:45:07 +02:00
@zoom.value = 100
if mime.match /^[^\/]+\/.*pdf.*/g
2020-05-21 21:56:16 +02:00
@renderPDF()
else if mime.match /image\/.*svg.*/g
2020-05-21 21:56:16 +02:00
@renderSVG()
else if mime.match /image\/.*/g
2020-05-21 21:56:16 +02:00
@renderImage()
else
@notify __("Mime type {0} is not supported", file.info.mime)
setStatus: (t) ->
($ @status).html t
2020-05-21 21:56:16 +02:00
setViewScale: (value) ->
return unless @currfile
mime = @currfile.info.mime
scale = (value / 100)
2021-02-11 14:49:19 +01:00
if mime.match /image\/.*svg.*/g
2020-05-21 21:56:16 +02:00
$($(@view).children()[0])
.css "width", "#{Math.round(value)}%"
.css "height", "#{Math.round(value)}%"
else if mime.match /image\/.*/g
return unless @img
canvas = $(@view).children()[0]
context = canvas.getContext '2d'
w = @img.width * scale
h = @img.height * scale
canvas.height = h
canvas.width = w
context.clearRect(0, 0, canvas.width, canvas.height)
context.scale scale, scale
context.drawImage @img, 0, 0
2021-02-11 14:49:19 +01:00
2020-05-21 21:56:16 +02:00
renderPDF: () ->
2021-02-11 14:49:19 +01:00
$(@find("statcontainer")).hide()
@trigger "resize"
($ @view).attr("class", "pdf")
frame = ($ "<iframe/>")
.css "width", "100%"
.css "height", "100%"
($ @view).append frame[0]
frame[0].src = "pkg://libpdfjs/web/viewer.html".asFileHandle().getlink() + "?file=" + @currfile.getlink()
2020-05-21 21:56:16 +02:00
renderSVG: () ->
2021-02-11 14:49:19 +01:00
$(@find("statcontainer")).show()
@trigger "resize"
($ @view).attr("class", "image")
2020-05-21 21:56:16 +02:00
@currfile.read().then (d) =>
@view.innerHTML = d
$($(@view).children()[0])
.css "width", "100%"
.css "height", "100%"
2020-05-21 21:56:16 +02:00
.catch (e) => @error __("Unable to read file: {0}", @currfile.path), e
2020-05-21 21:56:16 +02:00
renderImage: () ->
2021-02-11 14:49:19 +01:00
$(@find("statcontainer")).show()
@trigger "resize"
($ @view).attr("class", "image")
2020-05-21 21:56:16 +02:00
@currfile.read("binary").then (d) =>
img = new Image()
canvas = ($ "<canvas/>")[0]
($ @view).append canvas
#($ me.view).append img
img.onload = () =>
context = canvas.getContext '2d'
canvas.height = img.height
canvas.width = img.width
2020-05-21 21:56:16 +02:00
@img = img
#console.log canvas.width, canvas.height
context.drawImage img, 0, 0
2020-05-21 21:56:16 +02:00
@setStatus "#{@currfile.info.name} (#{@currfile.info.size} Kb) - #{img.width}x#{img.height}"
2020-05-21 21:56:16 +02:00
blob = new Blob [d], { type: @currfile.info.mime }
img.src = URL.createObjectURL blob
2020-05-21 21:56:16 +02:00
.catch (e) => @error __("Unable to read file: {0}", @currfile.path), e
menu: () ->
menu = [{
text: "__(File)",
2020-06-05 17:45:07 +02:00
nodes: [
{ text: "__(Open)", dataid: "#{@name}-Open", shortcut: "A-O" },
{ text: "__(Close)", dataid: "#{@name}-Close", shortcut: "C-X" },
],
2020-06-05 17:45:07 +02:00
onchildselect: (e) => @actionFile e.data.item.data.dataid
}]
menu
actionFile: (e) ->
switch e
when "#{@name}-Open"
@openDialog("FileDialog", {
title: __("Open file"),
mimes: @meta().mimes
}).then ( d ) =>
@open d.file.path.asFileHandle()
when "#{@name}-Close"
@quit()
this.OS.register "Preview", Preview