javascript in linux desktop
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Javascript in Linux Desktop
Yuren Ju
test
Yuren Ju
Use Linux: 9 years
For Desktop: 7-8 years
Red HatDebianGentooDebianUbuntuArch LinuxDebian
Yuren Ju
Blog: Yuren's Info Area
Email: [email protected]
Hacking Thursday, KaLUG
ASUSTek
Javascript always use in Web Applications.
Javascript always use in Web Applications.
Javascript in Linux Desktop
Web Application/Platform
Desktop Platform
Desktop Application
Internet
ApplicationPlatform
.................................
Performance
Opportunity!
Javascript for Web Application
Desktop Application
?
Javascript in desktop
Integration
Layout
Style/theme
Application
Platform
Web
Desktop
Web Application
JS
HTML+CSS
CSS
Layout
Style
Programming
Server side
Platform/Browser
JS
HTML+CSS
CSS
Layout
Style
Programming
Layout engine
Javascript engine
Platform/Browser (2)
FirefoxChrome
Layout engineGeckoWebkit
Javascript engineSpiderMonkeyV8
To Desktop Application
Desktop - Platform
XULRunner (Mozilla platform)
GNOME Javascript runtimeGJS/Seed
XULRunner
Programming in Web Browser!
Mozilla applications
XULRunner
JS
CSS
Layout
Style
Programming
Gecko layout engine
SpiderMonkey
XUL
DOM
Demo: http://www.hevanet.com/acorbin/xul/top.xul
Mozilla Platform - integration
Mozilla ApplicationSystemXPCOM/NPAPIC++/Javascript
Mozilla Platform - integration
D-BUS
VTE
notify
Glade
GTK
Javascript in GNOME
Seedbased on WebKit's JavaScriptCore
GJSbased on Mozilla's Spidermonkey engine
XULRunner
JS
CSS
Layout
Style
Programming
Gecko layout engine
SpiderMonkey
XUL
Javascript in GNOME
JS
Layout
Style
Programming
GObject introspection
Seed/GJS
Systemlibrary
Javascript in GNOME
Javascript engineJavascript desktop runtimeJavascript applicationSystem library
C API: GTK, Gstreamer,Clutter, Glib, etc.
GObjectintrospection
JavascriptCore/SpiderMonkey
Seed/GJS
GObject Introspection usage
const Gtk = imports.gi.Gtk;
var window = new Gtk.Window ();
GObject Introspection
new!
Language for GNOME
Traditional arch.
Native C APIGStreamerPython/Perl/Ruby/Java..., etc.VTEnotifyGTKClutter
GObject Introspection
Native C APIGIJSJavaPythonPerlRubyPHP?GStreamerVTEnotifyGTKClutter
Metadatausing annotations in the comments
GObject Introspection
g-ir-scanner
40 B2 02 00 10 B2........
g-ir-compiler
typelib
Gir xml file
Annotations
GObject Introspection
foo.cfoo.hLibrary source, with type annotationsFoo.girXML fileFoo.typelibBinary filelibgirepository.soSpecific language bindingslibfoo.solibffi.so
C API: gtk_button_set_label
java: button.setLabel("foo")
javascript/python/vala: button.set_label("foo")
perl: $button->set_label("foo")
scheme: (send button (set-label "foo"))
GObject Introspection
Native C APIGIJSJavaPythonPerlRubyPHP?GStreamerVTEnotifyGTKClutter
Seed/GJS
D-BUS
VTE
notify
Glade
GTK
$ aptitude search gir
Javascript
Hello world
Hello world (2)
Demo - js-gallery
Applications based on Seed
SeedSwell-foop
lightsoff
gnome-shell
Use javascript to control your desktop
file:///usr/share/gnome-shell/js/ui
Making extension just like Firefox!
gnome-shell --create-extension
Demo gnome-shell extension
Javascript in Linux Desktop
Apps based on javascript
Powerful extension system with js
Simple coding
http://live.gnome.org/JavaScript
ENDThank you!
But I have..., why GI?
Python-gtk
Ruby-gnome2
java-gnome
e.g. nautilusNo python, ruby, java binding...
Layout/Theme
GTK gtk-theme-engine
Gnome-shell (shell toolkit) libcroco (CSS)
MX toolkit CSS
GJS vs seed
EMCAScript supportGJS support javascript 1.8.1 extensions
Seed support javascript 1.5
for each, let, etc.
[item * 2 for each (item in list)]
Return values
GJSprint (texture.get_base_size());
Seedvar height = {}, width = {};
texture.get_base_size (width, height);
print (width: + width.value + , height: + height.value)
Clutter fine tune
GJSNo Actor.animate function
Seedworkaround for Actor.animate
But seed-2.28/2.30 use different event mapping
Signal
GJSactor.connect ("signal-name", callback)
Seedactor.signal["signal-name"].connect (callback)
actor.signal.destroy.connect (callback)
Presentation License
CC Attribution 3.0 Unportedhttp://creativecommons.org/licenses/by/3.0/
Images License
Creative Commons (Attribution-Share Alike 3.0 Unported)http://www.iconfinder.com/search/?q=iconset:sketchy http://www.iconfinder.com/search/?q=iconset:49handdrawing