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+WEBVTT
+
+00:00:03.600 --> 00:00:04.560
+Hello.
+
+00:00:04.560 --> 00:00:06.720
+Hopefully everyone is staying safe and
+
+00:00:06.720 --> 00:00:08.000
+staying home,
+
+00:00:08.000 --> 00:00:10.000
+I feel very grateful to live in a world
+
+00:00:10.000 --> 00:00:12.000
+today that technology and free software
+
+00:00:12.000 --> 00:00:13.759
+can be leveraged to connect people in
+
+00:00:13.759 --> 00:00:16.080
+such disconnected and difficult times,
+
+00:00:16.080 --> 00:00:17.840
+and to have an online conference like
+
+00:00:17.840 --> 00:00:19.920
+this. Hopefully you've all
+
+00:00:19.920 --> 00:00:22.960
+enjoyed this year's EmacsConf so far.
+
+00:00:22.960 --> 00:00:24.720
+Many thanks to all the people that made
+
+00:00:24.720 --> 00:00:26.880
+this possible.
+
+00:00:26.880 --> 00:00:30.000
+Anyways, welcome to my talk "Extend Emacs
+
+00:00:30.000 --> 00:00:30.960
+to Modern GUI
+
+00:00:30.960 --> 00:00:34.079
+Applications with EAF, the Emacs
+
+00:00:34.079 --> 00:00:35.920
+Application Framework".
+
+00:00:35.920 --> 00:00:38.320
+This will be my first ever talk, so
+
+00:00:38.320 --> 00:00:39.840
+apologies for my
+
+00:00:39.840 --> 00:00:43.280
+inexperience, let us begin.
+
+00:00:43.280 --> 00:00:46.559
+About me: my name is Matthew Zeng, you can
+
+00:00:46.559 --> 00:00:47.840
+also call me MT
+
+00:00:47.840 --> 00:00:50.640
+or Mingde. I'm a Chinese Canadian living
+
+00:00:50.640 --> 00:00:51.440
+in Toronto,
+
+00:00:51.440 --> 00:00:54.239
+Ontario. Offline: I'm an undergrad
+
+00:00:54.239 --> 00:00:56.079
+studying mathematics at the University
+
+00:00:56.079 --> 00:00:57.760
+of Waterloo.
+
+00:00:57.760 --> 00:01:00.480
+Online: I'm one of the admins of the
+
+00:01:00.480 --> 00:01:03.039
+Emacs China
+
+00:01:03.039 --> 00:01:06.320
+— the largest Emacs forum in China. So,
+
+00:01:06.320 --> 00:01:08.080
+to all Chinese listening to my talk right
+
+00:01:08.080 --> 00:01:10.960
+now, feel free to check it out.
+
+00:01:10.960 --> 00:01:14.320
+And this is a link to my GitHub profile,
+
+00:01:14.320 --> 00:01:16.206
+(and) to my projects I'm involved in.
+
+00:01:16.206 --> 00:01:18.240
+One's M-EMACS which is
+
+00:01:18.240 --> 00:01:20.159
+I'm the author of — a user-friendly
+
+00:01:20.159 --> 00:01:21.840
+full-featured Emacs configuration
+
+00:01:21.840 --> 00:01:22.799
+distribution,
+
+00:01:22.799 --> 00:01:25.040
+it is what I'm using right now, as well
+
+00:01:25.040 --> 00:01:26.880
+as the Emacs Application Framework
+
+00:01:26.880 --> 00:01:29.119
+which I help to maintain along with the
+
+00:01:29.119 --> 00:01:30.400
+other author
+
+00:01:30.400 --> 00:01:33.040
+lazycat, which of course, is today's
+
+00:01:33.040 --> 00:01:35.759
+topic.
+
+00:01:35.759 --> 00:01:38.720
+So, as you all might have already
+
+00:01:38.720 --> 00:01:40.960
+noticed I'm currently using Emacs
+
+00:01:40.960 --> 00:01:43.600
+and opening navigating closing
+
+00:01:43.600 --> 00:01:45.360
+all these websites that are rendered
+
+00:01:45.360 --> 00:01:46.159
+properly
+
+00:01:46.159 --> 00:01:49.200
+all within Emacs, it's all thanks to the
+
+00:01:49.200 --> 00:01:51.840
+EAF project.
+
+00:01:51.840 --> 00:01:54.000
+So, we're living in a society that's
+
+00:01:54.000 --> 00:01:55.920
+heavily dependent on the internet
+
+00:01:55.920 --> 00:01:59.520
+and multimedia, it is unavoidable to run
+
+00:01:59.520 --> 00:02:01.200
+to some occasion that you need to
+
+00:02:01.200 --> 00:02:02.880
+open a fancy website that uses
+
+00:02:02.880 --> 00:02:04.799
+JavaScript and CSS,
+
+00:02:04.799 --> 00:02:08.239
+or you need to watch some videos. However,
+
+00:02:08.239 --> 00:02:11.120
+due to the nature and history of Emacs,
+
+00:02:11.120 --> 00:02:11.840
+it cannot
+
+00:02:11.840 --> 00:02:13.840
+render all these modern graphics
+
+00:02:13.840 --> 00:02:16.400
+effectively and efficiently.
+
+00:02:16.400 --> 00:02:19.360
+Emacs is solely a text-based editing
+
+00:02:19.360 --> 00:02:20.400
+environment,
+
+00:02:20.400 --> 00:02:23.520
+and I argue that this is not a bad thing,
+
+00:02:23.520 --> 00:02:25.680
+in fact, it is one of the reasons that me
+
+00:02:25.680 --> 00:02:27.760
+and I believe many of you as well
+
+00:02:27.760 --> 00:02:29.760
+are attracted to Emacs in the first
+
+00:02:29.760 --> 00:02:30.879
+place.
+
+00:02:30.879 --> 00:02:33.760
+Unfortunately, this results in us having
+
+00:02:33.760 --> 00:02:35.680
+to open a dedicated web browser to
+
+00:02:35.680 --> 00:02:37.040
+browse the internet,
+
+00:02:37.040 --> 00:02:38.879
+open a dedicated video player to watch
+
+00:02:38.879 --> 00:02:41.440
+some videos, or a PDF renderer to read some
+
+00:02:41.440 --> 00:02:42.640
+documents.
+
+00:02:42.640 --> 00:02:45.200
+So far Emacs cannot do all these tasks on
+
+00:02:45.200 --> 00:02:46.000
+its own
+
+00:02:46.000 --> 00:02:48.080
+but can only be achieved using other
+
+00:02:48.080 --> 00:02:51.519
+external applications.
+
+00:02:51.519 --> 00:02:55.840
+So, the other author manateelazycat,
+
+00:02:55.840 --> 00:02:58.640
+or lazycat in short, didn't want to use
+
+00:02:58.640 --> 00:03:00.560
+all these external applications,
+
+00:03:00.560 --> 00:03:03.120
+he wanted to have an uninterrupted Emacs
+
+00:03:03.120 --> 00:03:04.159
+experience,
+
+00:03:04.159 --> 00:03:07.280
+he wanted to truly live in Emacs.
+
+00:03:07.280 --> 00:03:10.080
+However, it would be a lot of work to
+
+00:03:10.080 --> 00:03:11.040
+build this
+
+00:03:11.040 --> 00:03:13.519
+modern application from scratch, there's
+
+00:03:13.519 --> 00:03:16.239
+simply no time or research to do that.
+
+00:03:16.239 --> 00:03:18.800
+So, lazycat thought of utilizing existing
+
+00:03:18.800 --> 00:03:20.400
+applications
+
+00:03:20.400 --> 00:03:22.319
+and to try to make it collaborate with
+
+00:03:22.319 --> 00:03:24.959
+Emacs, there are many solutions available,
+
+00:03:24.959 --> 00:03:26.000
+one of it
+
+00:03:26.000 --> 00:03:28.560
+is the Emacs X Windows Manager, and I'm
+
+00:03:28.560 --> 00:03:30.159
+sure a lot of you already know that —
+
+00:03:30.159 --> 00:03:33.360
+the EXWM. However, it didn't work for him,
+
+00:03:33.360 --> 00:03:35.200
+because although EXWM opens the
+
+00:03:35.200 --> 00:03:37.440
+door to use other applications within
+
+00:03:37.440 --> 00:03:38.239
+Emacs,
+
+00:03:38.239 --> 00:03:40.879
+it as a fine window manager cannot
+
+00:03:40.879 --> 00:03:41.519
+modify,
+
+00:03:41.519 --> 00:03:43.920
+customize, or extend other software from
+
+00:03:43.920 --> 00:03:45.040
+Emacs.
+
+00:03:45.040 --> 00:03:46.799
+For example, it cannot modify the
+
+00:03:46.799 --> 00:03:48.480
+behavior when you press a key in
+
+00:03:48.480 --> 00:03:49.599
+Chromium or
+
+00:03:49.599 --> 00:03:52.159
+PDF viewer, therefore it cannot utilize
+
+00:03:52.159 --> 00:03:54.000
+the rich Emacs ecosystem that's been
+
+00:03:54.000 --> 00:03:57.360
+growing for almost 40 years.
+
+00:03:57.360 --> 00:04:00.720
+On the other hand, in the EAF browser, so,
+
+00:04:00.720 --> 00:04:06.206
+if you M-x eaf-open-browser-with-history,
+
+00:04:06.206 --> 00:04:07.200
+you can see
+
+00:04:07.200 --> 00:04:09.840
+on the lower half of my screen — a list of
+
+00:04:09.840 --> 00:04:11.920
+histories sorted by my personal
+
+00:04:11.920 --> 00:04:14.560
+most visited sites, and you can search
+
+00:04:14.560 --> 00:04:16.560
+for a site that you've been
+
+00:04:16.560 --> 00:04:19.440
+to or search for some keyword in a
+
+00:04:19.440 --> 00:04:21.840
+search engine.
+
+00:04:21.840 --> 00:04:24.240
+So, this is all achieved by utilizing the
+
+00:04:24.240 --> 00:04:25.919
+popular completion framework in the
+
+00:04:25.919 --> 00:04:29.280
+Emacs ecosystem — ivy.
+
+00:04:29.280 --> 00:04:31.120
+So, lazycat decided to develop a
+
+00:04:31.120 --> 00:04:33.680
+solution of his own in 2018,
+
+00:04:33.680 --> 00:04:36.960
+namely the EAF project, so, I joined the
+
+00:04:36.960 --> 00:04:42.756
+development last year, 2019.
+
+00:04:42.756 --> 00:04:44.000
+EAF is
+
+00:04:44.000 --> 00:04:47.880
+a highly customizable and extensible
+
+00:04:47.880 --> 00:04:49.759
+GUI application framework that extends
+
+00:04:49.759 --> 00:04:52.056
+Emacs to graphical capabilities using
+
+00:04:52.056 --> 00:04:57.840
+PyQt5, and it is not a window manager.
+
+00:04:57.840 --> 00:05:02.479
+Alright. So, in the README, you can see a
+
+00:05:02.479 --> 00:05:03.440
+list of GIFs
+
+00:05:03.440 --> 00:05:05.600
+showcasing all the available EAF
+
+00:05:05.600 --> 00:05:06.720
+applications,
+
+00:05:06.720 --> 00:05:09.520
+a browser, a markdown previewer, a video
+
+00:05:09.520 --> 00:05:12.789
+player, a PDF viewer, and more.
+
+00:05:12.789 --> 00:05:14.240
+Today I don't have
+
+00:05:14.240 --> 00:05:16.160
+enough time to demonstrate each one of
+
+00:05:16.160 --> 00:05:16.560
+them,
+
+00:05:16.560 --> 00:05:18.720
+but I will select a couple applications
+
+00:05:18.720 --> 00:05:21.120
+to show you.
+
+00:05:21.120 --> 00:05:24.240
+So, since we are already using EAF browser,
+
+00:05:24.240 --> 00:05:27.840
+we'll start with this. Besides using the
+
+00:05:27.840 --> 00:05:29.600
+classic Control n (C-n), Control p (C-p)
+
+00:05:29.600 --> 00:05:32.000
+you can also use the Vim style hjkl to
+
+00:05:32.000 --> 00:05:33.840
+move up or down.
+
+00:05:33.840 --> 00:05:36.320
+Also, Meta Shift comma (M-<) or g (moves) to the
+
+00:05:36.320 --> 00:05:37.280
+beginning of page,
+
+00:05:37.280 --> 00:05:39.120
+Meta Shift period (M->) or capital g (moves) to
+
+00:05:39.120 --> 00:05:41.199
+the end of page.
+
+00:05:41.199 --> 00:05:45.306
+Vimium and Surfingkeys
+
+00:05:45.306 --> 00:05:46.479
+are popular keyboard-based
+
+00:05:46.479 --> 00:05:48.400
+browsing techniques in Chrome,
+
+00:05:48.400 --> 00:05:50.479
+and they've imported here as well. You
+
+00:05:50.479 --> 00:05:52.720
+can press f to toggle markers pointing
+
+00:05:52.720 --> 00:05:53.039
+to
+
+00:05:53.039 --> 00:05:55.280
+all the links in the current page, say, I
+
+00:05:55.280 --> 00:05:56.960
+want to visit the wiki —
+
+00:05:56.960 --> 00:05:59.680
+which comes very very handy when you
+
+00:05:59.680 --> 00:06:02.400
+want to configure EAF to your liking,
+
+00:06:02.400 --> 00:06:04.720
+so you see the marker on top of wiki is
+
+00:06:04.720 --> 00:06:05.440
+dd,
+
+00:06:05.440 --> 00:06:08.479
+press dd and Enter (RET), and now
+
+00:06:08.479 --> 00:06:10.240
+you are navigated to this link, so you
+
+00:06:10.240 --> 00:06:13.840
+don't need to use your mouse at all.
+
+00:06:13.840 --> 00:06:16.560
+So, a full list of key bindings can be
+
+00:06:16.560 --> 00:06:17.680
+found when you (press)
+
+00:06:17.680 --> 00:06:20.560
+Control h m (C-h m), just as any other Emacs major
+
+00:06:20.560 --> 00:06:21.199
+mode,
+
+00:06:21.199 --> 00:06:22.960
+so you don't have to remember everything…
+
+00:06:22.960 --> 00:06:25.600
+all the key bindings I said to you.
+
+00:06:25.600 --> 00:06:28.560
+So, this is a global binding application
+
+00:06:28.560 --> 00:06:30.960
+to every other EAF application as well.
+
+00:06:30.960 --> 00:06:36.720
+You can find it under the wiki in the
+
+00:06:36.720 --> 00:06:37.600
+keybindings
+
+00:06:37.600 --> 00:06:40.639
+section, so press f again and use
+
+00:06:40.639 --> 00:06:44.240
+ns, press Enter (RET), now you're in the
+
+00:06:44.240 --> 00:06:45.600
+keybindings web page.
+
+00:06:45.600 --> 00:06:47.520
+You can see all of the keybindings
+
+00:06:47.520 --> 00:06:49.280
+available in every
+
+00:06:49.280 --> 00:06:53.919
+EAF application, and you can try them out,
+
+00:06:53.919 --> 00:06:56.479
+and you can customize your key bindings
+
+00:06:56.479 --> 00:06:57.956
+using eaf-bind-key,
+
+00:06:57.956 --> 00:07:00.240
+you can customize Control n (C-n) as
+
+00:07:00.240 --> 00:07:02.960
+in the web page
+
+00:07:02.960 --> 00:07:05.759
+to scroll up in the EAF PDF viewer, or you
+
+00:07:05.759 --> 00:07:06.639
+can unbind
+
+00:07:06.639 --> 00:07:08.806
+an existing binding using
+
+00:07:08.806 --> 00:07:10.000
+eaf-bind-key,
+
+00:07:10.000 --> 00:07:14.840
+bind it to nil, so it doesn't bind to
+
+00:07:14.840 --> 00:07:16.160
+anything.
+
+00:07:16.160 --> 00:07:20.319
+Okay, so, here comes the important part,
+
+00:07:20.319 --> 00:07:22.479
+if you want to customize EAF, you should
+
+00:07:22.479 --> 00:07:25.440
+visit the customization page in the wiki.
+
+00:07:25.440 --> 00:07:28.840
+Now, I press Meta b to go back in
+
+00:07:28.840 --> 00:07:30.240
+history, and
+
+00:07:30.240 --> 00:07:32.960
+go to the customization page, press f,
+
+00:07:32.960 --> 00:07:34.080
+press ad,
+
+00:07:34.080 --> 00:07:36.639
+Enter, and now we're in the customization
+
+00:07:36.639 --> 00:07:37.360
+page.
+
+00:07:37.360 --> 00:07:39.280
+So, the first customization option you
+
+00:07:39.280 --> 00:07:42.639
+see is dark mode,
+
+00:07:42.639 --> 00:07:44.479
+let's say, if you want to turn on the dark
+
+00:07:44.479 --> 00:07:46.720
+mode for EAF browser,
+
+00:07:46.720 --> 00:07:48.479
+and you don't want to use your mouse to
+
+00:07:48.479 --> 00:07:49.919
+do all this stuff.
+
+00:07:49.919 --> 00:07:53.360
+You press c, and you can select
+
+00:07:53.360 --> 00:07:55.840
+c to toggle the caret browsing, you can
+
+00:07:55.840 --> 00:07:58.240
+see a lot of markers available,
+
+00:07:58.240 --> 00:08:01.280
+poped up again, but they're not
+
+00:08:01.280 --> 00:08:02.720
+on top of links but instead of
+
+00:08:02.720 --> 00:08:03.599
+paragraphs.
+
+00:08:03.599 --> 00:08:05.360
+You select the paragraph of your choice,
+
+00:08:05.360 --> 00:08:06.639
+in this case you want
+
+00:08:06.639 --> 00:08:10.240
+ls which comes here,
+
+00:08:10.240 --> 00:08:12.720
+and then you just move the
+
+00:08:12.720 --> 00:08:15.120
+cursor like what you always do
+
+00:08:15.120 --> 00:08:18.800
+in Emacs, and now you select everything
+
+00:08:18.800 --> 00:08:26.479
+and use Meta w (M-w) to copy the text.
+
+00:08:26.479 --> 00:08:29.199
+Now, we (run) Meta Shift colon (M-:) to evaluate
+
+00:08:29.199 --> 00:08:30.960
+what we just copied,
+
+00:08:30.960 --> 00:08:35.120
+and set that to true, and
+
+00:08:35.120 --> 00:08:38.320
+press r or F5 to refresh the page,
+
+00:08:38.320 --> 00:08:42.159
+voilà we have the dark mode enabled.
+
+00:08:42.159 --> 00:08:44.880
+So, there are…, well, let's toggle
+
+00:08:44.880 --> 00:08:46.160
+it back off for now.
+
+00:08:46.160 --> 00:08:49.360
+Now, we (run) Meta Shift colon (M-:) again,
+
+00:08:49.360 --> 00:08:51.600
+and we find the one we just used, and
+
+00:08:51.600 --> 00:08:53.519
+change it back to false,
+
+00:08:53.519 --> 00:08:56.880
+and refresh the page, back in the light
+
+00:08:56.880 --> 00:08:59.360
+mode.
+
+00:08:59.360 --> 00:09:02.160
+So, there are many other customization
+
+00:09:02.160 --> 00:09:03.680
+options available, you can either
+
+00:09:03.680 --> 00:09:05.920
+evaluate like what we just did or add it
+
+00:09:05.920 --> 00:09:08.000
+to your Emacs configuration file.
+
+00:09:08.000 --> 00:09:11.680
+So, in this wiki…,
+
+00:09:11.680 --> 00:09:14.399
+you can make the EAF browser to
+
+00:09:14.399 --> 00:09:16.320
+continue where you left off
+
+00:09:16.320 --> 00:09:20.160
+similar to the Chromium setting.
+
+00:09:20.160 --> 00:09:22.800
+You can make EAF the default browser
+
+00:09:22.800 --> 00:09:23.839
+(in) Emacs by
+
+00:09:23.839 --> 00:09:26.720
+aliasing browse-web to
+
+00:09:26.720 --> 00:09:27.680
+eaf-open-browser,
+
+00:09:27.680 --> 00:09:31.200
+or set the browse-url-browser-function to
+
+00:09:31.200 --> 00:09:33.519
+eaf-open-browser, there's just some tricks.
+
+00:09:33.519 --> 00:09:34.480
+And there (is) also
+
+00:09:34.480 --> 00:09:37.920
+an experimental adblocker currently
+
+00:09:37.920 --> 00:09:41.680
+in place, therefore it can
+
+00:09:41.680 --> 00:09:44.720
+block some elements but not all, so
+
+00:09:44.720 --> 00:09:47.279
+we really encourage people to help us
+
+00:09:47.279 --> 00:09:48.240
+test out and
+
+00:09:48.240 --> 00:09:51.440
+add more conditions in.
+
+00:09:51.440 --> 00:09:54.560
+So, you can…, the EAF Browser is able to
+
+00:09:54.560 --> 00:09:55.760
+download
+
+00:09:55.760 --> 00:09:57.680
+any files from the internet, and it will
+
+00:09:57.680 --> 00:10:04.000
+be downloaded using Aria2.
+
+00:10:04.000 --> 00:10:05.339
+You can also customize
+
+00:10:05.339 --> 00:10:07.200
+the eaf-browser-download-path
+
+00:10:07.200 --> 00:10:11.120
+using eaf-setq, it's a function that we
+
+00:10:11.120 --> 00:10:13.623
+defined similar to setq,
+
+00:10:13.623 --> 00:10:15.040
+the normal setq we know.
+
+00:10:15.040 --> 00:10:16.480
+So, by default the download file is
+
+00:10:16.480 --> 00:10:18.160
+stored in your home directory slash
+
+00:10:18.160 --> 00:10:19.600
+downloads,
+
+00:10:19.600 --> 00:10:20.800
+and you can change that whenever you
+
+00:10:20.800 --> 00:10:22.720
+want. You can also disable
+
+00:10:22.720 --> 00:10:26.079
+saving browsing history, so, remember
+
+00:10:26.079 --> 00:10:27.089
+when I press…,
+
+00:10:27.089 --> 00:10:28.959
+when I use M-x eaf-open-browser's
+
+00:10:28.959 --> 00:10:30.480
+history, I see all the
+
+00:10:30.480 --> 00:10:32.079
+histories here, but if you want more
+
+00:10:32.079 --> 00:10:33.680
+privacy, you don't want that to be
+
+00:10:33.680 --> 00:10:35.360
+available at all. You can turn it off
+
+00:10:35.360 --> 00:10:37.356
+easily with eaf-setq,
+
+00:10:37.356 --> 00:10:40.640
+and set that remember-history to false.
+
+00:10:40.640 --> 00:10:42.399
+You can also set your default search
+
+00:10:42.399 --> 00:10:43.839
+engine.
+
+00:10:43.839 --> 00:10:47.200
+Right now we have Google, although
+
+00:10:47.200 --> 00:10:50.480
+not really good but… Google and also
+
+00:10:50.480 --> 00:10:53.600
+DuckDuckGo which is a better search engine,
+
+00:10:53.600 --> 00:10:57.360
+well, yeah, ethically better search
+
+00:10:57.360 --> 00:10:59.360
+engine.
+
+00:10:59.360 --> 00:11:02.560
+So, you can also configure
+
+00:11:02.560 --> 00:11:05.040
+the zoom. The default zoom of your
+
+00:11:05.040 --> 00:11:07.600
+browser is 1.0, you can convert
+
+00:11:07.600 --> 00:11:10.000
+default-zoom to 1.25, so when
+
+00:11:10.000 --> 00:11:11.920
+you open any web page, it will be
+
+00:11:11.920 --> 00:11:17.360
+zoomed by default. You can
+
+00:11:17.360 --> 00:11:20.399
+also disable JavaScript, although I
+
+00:11:20.399 --> 00:11:22.240
+personally don't really suggest you to
+
+00:11:22.240 --> 00:11:23.440
+do, because it will
+
+00:11:23.440 --> 00:11:26.240
+basically break a lot of our features,
+
+00:11:26.240 --> 00:11:28.480
+because a lot of the browser
+
+00:11:28.480 --> 00:11:29.519
+related features
+
+00:11:29.519 --> 00:11:33.760
+must be implemented using JavaScript,
+
+00:11:33.760 --> 00:11:35.440
+but yeah, you can do it if you really
+
+00:11:35.440 --> 00:11:37.920
+want to. And there's also some
+
+00:11:37.920 --> 00:11:41.519
+customization on EAF Camera
+
+00:11:41.519 --> 00:11:47.760
+you can do as well.
+
+00:11:47.760 --> 00:11:52.399
+Let's move on to EAF PDF Viewer.
+
+00:11:52.399 --> 00:11:56.079
+Now, let's open
+
+00:11:56.079 --> 00:11:59.440
+the PDF file using EAF.
+
+00:11:59.440 --> 00:12:01.519
+So, that's one something already here, but
+
+00:12:01.519 --> 00:12:02.720
+let's open it here.
+
+00:12:02.720 --> 00:12:06.079
+So, eaf-open, and
+
+00:12:06.079 --> 00:12:08.160
+select "Introduction to Programming in
+
+00:12:08.160 --> 00:12:11.440
+Emacs Lisp".
+
+00:12:11.440 --> 00:12:13.760
+I have it already open, but it's okay.
+
+00:12:13.760 --> 00:12:17.040
+So, you have the file,
+
+00:12:17.040 --> 00:12:20.160
+you have other files displayed…
+
+00:12:20.160 --> 00:12:22.800
+you have all the pages display, sorry.
+
+00:12:23.200 --> 00:12:27.040
+There are 273 pages in total, but notice
+
+00:12:27.040 --> 00:12:29.279
+how fast it is to browse
+
+00:12:29.279 --> 00:12:31.440
+all the pages, it is blazingly fast,
+
+00:12:31.440 --> 00:12:33.519
+that's all thanks to Python and
+
+00:12:33.519 --> 00:12:37.040
+MuPDF which you don't really get from
+
+00:12:37.040 --> 00:12:40.880
+Emacs Lisp.
+
+00:12:40.880 --> 00:12:43.600
+So, let's say if I want to jump to page
+
+00:12:43.600 --> 00:12:44.079
+50.
+
+00:12:44.079 --> 00:12:48.639
+We press p and Enter 50.
+
+00:12:48.639 --> 00:12:53.279
+And here we are, we are at page 50.
+
+00:12:53.279 --> 00:12:55.440
+You can look at the lower right to
+
+00:12:55.440 --> 00:12:58.880
+verify the page you're on.
+
+00:12:58.880 --> 00:13:05.120
+You can use i to toggle dark mode
+
+00:13:05.120 --> 00:13:07.839
+as expected. Let's say you want to
+
+00:13:07.839 --> 00:13:08.240
+find
+
+00:13:08.240 --> 00:13:11.519
+table of contents, so use Control s —
+
+00:13:11.519 --> 00:13:15.680
+the Emacs default binding for I-search,
+
+00:13:15.680 --> 00:13:19.360
+and search for a "table of contents",
+
+00:13:19.360 --> 00:13:21.680
+here we are, it is highlighted for you,
+
+00:13:21.680 --> 00:13:23.120
+and you can Control s for more but
+
+00:13:23.120 --> 00:13:26.006
+there's only one match,
+
+00:13:26.006 --> 00:13:27.200
+you (press) Control g (C-g) to
+
+00:13:27.200 --> 00:13:28.800
+disable the highlight,
+
+00:13:28.800 --> 00:13:30.880
+and you see a lot of options for you to
+
+00:13:30.880 --> 00:13:32.320
+go.
+
+00:13:32.320 --> 00:13:35.040
+Okay. Let's say, if you want to go to the
+
+00:13:35.040 --> 00:13:36.240
+preface.
+
+00:13:36.240 --> 00:13:39.519
+That is, you press f which is
+
+00:13:39.519 --> 00:13:40.639
+also similar to
+
+00:13:40.639 --> 00:13:44.240
+EAF browser, you press f for Vimium,
+
+00:13:44.240 --> 00:13:47.760
+and you see the marker, now change to wn,
+
+00:13:47.760 --> 00:13:50.160
+press wn, and then you can go to the
+
+00:13:50.160 --> 00:13:51.279
+preface.
+
+00:13:51.279 --> 00:13:54.320
+Now, we are at the preface.
+
+00:13:54.320 --> 00:13:56.480
+So, now you finish reading, you want to
+
+00:13:56.480 --> 00:13:57.600
+save your progress?
+
+00:13:57.600 --> 00:13:59.440
+No worries, it is already saved for you
+
+00:13:59.440 --> 00:14:01.199
+by EAF. You can safely
+
+00:14:01.199 --> 00:14:04.240
+close the document using x,
+
+00:14:04.240 --> 00:14:07.519
+and opening again, eaf-open,
+
+00:14:07.519 --> 00:14:10.560
+and the file…, see you are at
+
+00:14:10.560 --> 00:14:14.000
+preface again. You're right at where
+
+00:14:14.000 --> 00:14:16.560
+you left of.
+
+00:14:16.560 --> 00:14:19.440
+You can also use M-x org-store-link, or
+
+00:14:19.440 --> 00:14:20.480
+Control c l (C-c l) —
+
+00:14:20.480 --> 00:14:23.279
+which I prefer, if you want to save a
+
+00:14:23.279 --> 00:14:24.480
+particular page in
+
+00:14:24.480 --> 00:14:28.240
+a Org mode file. Now,
+
+00:14:28.240 --> 00:14:30.320
+I go back to my presentation doc, I don't
+
+00:14:30.320 --> 00:14:31.760
+need this anymore.
+
+00:14:31.760 --> 00:14:35.600
+So, you just (press) Control c Control l (C-c C-l),
+
+00:14:35.600 --> 00:14:39.120
+or I think M-x org-insert-link.
+
+00:14:39.120 --> 00:14:41.040
+You can find the file right here, and
+
+00:14:41.040 --> 00:14:42.399
+you press Enter (RET),
+
+00:14:42.399 --> 00:14:44.320
+and you press Enter (RET) for the description
+
+00:14:44.320 --> 00:14:46.480
+again, and now it's right here,
+
+00:14:46.480 --> 00:14:50.720
+and Control c Control o (C-c C-o) to open it. Voilà!
+
+00:14:50.720 --> 00:14:54.000
+You're back.
+
+00:14:54.000 --> 00:14:57.120
+Let's now demonstrate the EAF Video
+
+00:14:57.120 --> 00:14:58.880
+Player.
+
+00:14:58.880 --> 00:15:02.639
+So, M-x eaf-open, you use eaf-open whenever
+
+00:15:02.639 --> 00:15:03.279
+you want to
+
+00:15:03.279 --> 00:15:06.079
+open some file. You use eaf-open-browser
+
+00:15:06.079 --> 00:15:07.279
+if you want to use some
+
+00:15:07.279 --> 00:15:09.920
+actual application that's not really
+
+00:15:09.920 --> 00:15:11.199
+related to a file.
+
+00:15:11.199 --> 00:15:14.800
+So, eaf-open, and select the video
+
+00:15:14.800 --> 00:15:15.600
+you want, so,
+
+00:15:15.600 --> 00:15:18.320
+video-demo, I already have a video
+
+00:15:18.320 --> 00:15:19.040
+demo
+
+00:15:19.040 --> 00:15:21.839
+ready, because I recorded a video of
+
+00:15:21.839 --> 00:15:22.720
+the demo
+
+00:15:22.720 --> 00:15:26.000
+of the EAF Camera, have a look.
+
+00:15:26.000 --> 00:15:28.079
+Let's move to the beginning, "Hello people
+
+00:15:28.079 --> 00:15:29.279
+from the future!
+
+00:15:29.279 --> 00:15:32.399
+This is a demo of the EAF Video Player
+
+00:15:32.399 --> 00:15:35.199
+that demos the EAF Camera feature,
+
+00:15:35.199 --> 00:15:37.440
+so, as you can see on the screen of me
+
+00:15:37.440 --> 00:15:38.639
+inside my camera,
+
+00:15:38.639 --> 00:15:40.959
+and the screen is actually with all
+
+00:15:40.959 --> 00:15:42.880
+within Emacs.
+
+00:15:42.880 --> 00:15:45.273
+(Right, the video itself is as well, haha.)
+
+00:15:45.273 --> 00:15:46.079
+You can open this
+
+00:15:46.079 --> 00:15:49.839
+using eaf-open-camera
+
+00:15:49.839 --> 00:15:53.040
+which I'm already into, and you can
+
+00:15:53.040 --> 00:15:53.600
+press
+
+00:15:53.600 --> 00:15:56.720
+p to capture a photo,
+
+00:15:56.720 --> 00:15:59.680
+so, the photo is by default stored at
+
+00:15:59.680 --> 00:16:02.773
+your $HOME/Downloads directory,
+
+00:16:02.773 --> 00:16:04.320
+and you can modify it
+
+00:16:04.320 --> 00:16:07.839
+freely. If you go here, and you can see
+
+00:16:07.839 --> 00:16:09.519
+the camera stored
+
+00:16:09.519 --> 00:16:13.759
+right here."
+
+00:16:13.759 --> 00:16:16.240
+So, you press Space (SPC) to pause, what I used
+
+00:16:16.240 --> 00:16:17.120
+here is
+
+00:16:17.120 --> 00:16:20.320
+the eaf-open-this-from-dired.
+
+00:16:20.320 --> 00:16:22.959
+Basically, in dired
+
+00:16:22.959 --> 00:16:23.839
+you select
+
+00:16:23.839 --> 00:16:26.959
+the file that should be opened by
+
+00:16:26.959 --> 00:16:30.320
+EAF, and I used that. It detects that
+
+00:16:30.320 --> 00:16:32.720
+it wants to use the EAF Image Viewer, so
+
+00:16:32.720 --> 00:16:35.839
+I accidentally tested EAF Image Viewer
+
+00:16:35.839 --> 00:16:40.240
+before I noticed. That gives the
+
+00:16:40.240 --> 00:16:43.680
+image of the photo I just took
+
+00:16:43.680 --> 00:16:47.040
+using EAF Camera. As you can see, you
+
+00:16:47.040 --> 00:16:47.360
+can
+
+00:16:47.360 --> 00:16:50.720
+use hl — the Vim binding to navigate
+
+00:16:50.720 --> 00:16:53.256
+in the timestamp in the video,
+
+00:16:53.256 --> 00:16:55.920
+and I can use
+
+00:16:55.920 --> 00:17:02.320
+jk to change the volumes of the video.
+
+00:17:02.320 --> 00:17:05.520
+Alright. Now, you've seen all the basic
+
+00:17:05.520 --> 00:17:06.160
+usages
+
+00:17:06.160 --> 00:17:08.720
+of the EAF project, it comes the question
+
+00:17:08.720 --> 00:17:11.600
+of what is the magic behind it.
+
+00:17:11.600 --> 00:17:14.559
+All right. Let's open the hacking page in
+
+00:17:14.559 --> 00:17:15.919
+the wiki,
+
+00:17:15.919 --> 00:17:20.400
+the design is laid out in a diagram here.
+
+00:17:20.400 --> 00:17:25.120
+Let's put it
+
+00:17:25.120 --> 00:17:27.839
+side by side along with my text, so
+
+00:17:27.839 --> 00:17:32.320
+we can follow through.
+
+00:17:32.320 --> 00:17:36.080
+Right, okay. Let me…,
+
+00:17:36.080 --> 00:17:42.320
+sorry, let me drink some water.
+
+00:17:42.320 --> 00:17:46.000
+This page in the wiki went into a lot
+
+00:17:46.000 --> 00:17:48.160
+of detail,
+
+00:17:48.160 --> 00:17:49.520
+due to the time constraint I will just
+
+00:17:49.520 --> 00:17:51.679
+rephrase some of the ideas here, so for
+
+00:17:51.679 --> 00:17:53.520
+anyone interested, please have a look at
+
+00:17:53.520 --> 00:17:55.600
+the wiki yourself.
+
+00:17:55.600 --> 00:17:58.160
+The easiest way to think about EAF is
+
+00:17:58.160 --> 00:17:58.720
+that
+
+00:17:58.720 --> 00:18:01.679
+the actual GUI application is started in
+
+00:18:01.679 --> 00:18:02.960
+the background,
+
+00:18:02.960 --> 00:18:04.960
+then the frame of the application is
+
+00:18:04.960 --> 00:18:07.120
+attached to the appropriate location on
+
+00:18:07.120 --> 00:18:07.679
+the
+
+00:18:07.679 --> 00:18:10.720
+Emacs window. So,
+
+00:18:10.720 --> 00:18:13.440
+EAF linked Qt5 with Emacs using
+
+00:18:13.440 --> 00:18:14.960
+Elisp and Python.
+
+00:18:14.960 --> 00:18:17.120
+On the Python side which is colored
+
+00:18:17.120 --> 00:18:18.640
+yellow in the image,
+
+00:18:18.640 --> 00:18:20.439
+we have QGraphicsView and
+
+00:18:20.439 --> 00:18:22.960
+QGraphicsScene objects.
+
+00:18:22.960 --> 00:18:25.039
+These are used to simulate the Emacs
+
+00:18:25.039 --> 00:18:26.640
+window buffer design
+
+00:18:26.640 --> 00:18:28.640
+where QGraphicsScene is similar to
+
+00:18:28.640 --> 00:18:29.840
+buffers in Emacs,
+
+00:18:29.840 --> 00:18:31.840
+it controls the state and the content
+
+00:18:31.840 --> 00:18:34.240
+details of the application
+
+00:18:34.240 --> 00:18:41.200
+where QGraphicsView is similar to Emacs
+
+00:18:41.200 --> 00:18:43.200
+window. It populates the buffer
+
+00:18:43.200 --> 00:18:45.919
+(QGraphicsScene) to the foreground at
+
+00:18:45.919 --> 00:18:46.960
+the appropriate
+
+00:18:46.960 --> 00:18:48.573
+position.
+
+00:18:48.573 --> 00:18:50.320
+Whenever an EAF mode buffer
+
+00:18:50.320 --> 00:18:57.679
+brings to a background….
+
+00:18:57.679 --> 00:18:59.679
+Whenever an EAF mode buffer brings to the
+
+00:18:59.679 --> 00:19:00.880
+foreground, sorry,
+
+00:19:00.880 --> 00:19:02.559
+a QGraphicsView instance is
+
+00:19:02.559 --> 00:19:05.120
+created, and whenever the buffer goes to
+
+00:19:05.120 --> 00:19:06.080
+the background
+
+00:19:06.080 --> 00:19:08.000
+the QGraphicsView instance is then
+
+00:19:08.000 --> 00:19:09.120
+deleted,
+
+00:19:09.120 --> 00:19:10.960
+while QGraphicsScene — the actual
+
+00:19:10.960 --> 00:19:12.480
+process — remains running in the
+
+00:19:12.480 --> 00:19:14.480
+background until the EAF mode buffer is
+
+00:19:14.480 --> 00:19:16.000
+killed.
+
+00:19:16.000 --> 00:19:18.320
+GPU compositing is used to ensure that
+
+00:19:18.320 --> 00:19:19.440
+QGraphicsView and
+
+00:19:19.440 --> 00:19:21.840
+QGraphicsScene is synchronized real time.
+
+00:19:21.840 --> 00:19:24.000
+Using QWindow::setParent function
+
+00:19:24.000 --> 00:19:25.679
+the QGraphicsView is attached to the
+
+00:19:25.679 --> 00:19:27.840
+appropriate location on the Emacs frame,
+
+00:19:27.840 --> 00:19:30.640
+so that although GUI applications are
+
+00:19:30.640 --> 00:19:32.400
+not running within Emacs,
+
+00:19:32.400 --> 00:19:36.160
+they look as if they were.
+
+00:19:36.160 --> 00:19:39.039
+When user types on the keyboard it is
+
+00:19:39.039 --> 00:19:41.039
+first received by the Emacs
+
+00:19:41.039 --> 00:19:43.520
+EAF mode buffer, and then Elisp sends
+
+00:19:43.520 --> 00:19:45.360
+the event to QGraphicsScene using
+
+00:19:45.360 --> 00:19:46.240
+D-Bus.
+
+00:19:46.240 --> 00:19:48.720
+When user clicks on the GUI application
+
+00:19:48.720 --> 00:19:50.799
+it is received by the QGraphicsView
+
+00:19:50.799 --> 00:19:53.280
+and processed in Python. Elisp can
+
+00:19:53.280 --> 00:19:55.200
+communicate with Python through D-Bus,
+
+00:19:55.200 --> 00:19:59.200
+in other words you can
+
+00:19:59.200 --> 00:20:01.360
+customize and extend Emacs not just
+
+00:20:01.360 --> 00:20:01.760
+using
+
+00:20:01.760 --> 00:20:04.480
+Elisp, and now you can use Python, this way
+
+00:20:04.480 --> 00:20:05.360
+one can leverage
+
+00:20:05.360 --> 00:20:07.039
+all the Python properties like
+
+00:20:07.039 --> 00:20:09.600
+multi-threading or some other stuff,
+
+00:20:09.600 --> 00:20:11.679
+the entire Python ecosystem can be
+
+00:20:11.679 --> 00:20:13.520
+utilized as well,
+
+00:20:13.520 --> 00:20:16.159
+such as the Qt web engine that is the
+
+00:20:16.159 --> 00:20:16.960
+basis for
+
+00:20:16.960 --> 00:20:20.640
+our EAF Browser, and PyMuPDF is the
+
+00:20:20.640 --> 00:20:23.360
+basis for the EAF PDF Viewer.
+
+00:20:23.360 --> 00:20:25.840
+This really opens the window to many
+
+00:20:25.840 --> 00:20:28.240
+many new possibilities to extend Emacs
+
+00:20:28.240 --> 00:20:32.720
+using EAF.
+
+00:20:32.720 --> 00:20:36.080
+All right, back here. We are always
+
+00:20:36.080 --> 00:20:37.760
+looking for people to join the
+
+00:20:37.760 --> 00:20:39.679
+development, there are many many
+
+00:20:39.679 --> 00:20:42.720
+more work that needs to be done,
+
+00:20:42.720 --> 00:20:44.640
+such as testing and debug EAF on
+
+00:20:44.640 --> 00:20:46.640
+more Linux distros and window managers
+
+00:20:46.640 --> 00:20:47.760
+such as i3
+
+00:20:47.760 --> 00:20:51.200
+and stuff, you can also add new EAF
+
+00:20:51.200 --> 00:20:52.080
+applications,
+
+00:20:52.080 --> 00:20:54.240
+or debug and enhance existing EAF
+
+00:20:54.240 --> 00:20:55.440
+applications,
+
+00:20:55.440 --> 00:20:58.000
+or you can port EAF to native Wayland
+
+00:20:58.000 --> 00:21:00.240
+which I just discussed with
+
+00:21:00.240 --> 00:21:03.840
+the emacs-webkit author
+
+00:21:03.840 --> 00:21:07.919
+Akira Kyle, and he told me that
+
+00:21:07.919 --> 00:21:11.200
+EAF doesn't really work on
+
+00:21:11.200 --> 00:21:14.320
+native Wayland, because it uses
+
+00:21:14.320 --> 00:21:16.799
+XWayland, so it doesn't work on the pgtk
+
+00:21:16.799 --> 00:21:18.159
+port of Emacs.
+
+00:21:18.159 --> 00:21:20.559
+And we also need people to port EAF to
+
+00:21:20.559 --> 00:21:22.080
+non-free operating systems
+
+00:21:22.080 --> 00:21:25.600
+including Windows and macOS,
+
+00:21:25.600 --> 00:21:28.480
+and that's because, like, D-Bus is a Linux
+
+00:21:28.480 --> 00:21:30.080
+specific feature, so it doesn't really
+
+00:21:30.080 --> 00:21:31.360
+work on other platform.
+
+00:21:31.360 --> 00:21:33.039
+We need to check, replace it with some
+
+00:21:33.039 --> 00:21:34.640
+alternative, and
+
+00:21:34.640 --> 00:21:36.720
+QGraphicsScene somehow doesn't really
+
+00:21:36.720 --> 00:21:38.640
+work on macOS,
+
+00:21:38.640 --> 00:21:40.320
+and there are many other to-do lists
+
+00:21:40.320 --> 00:21:42.880
+available, so please have a look
+
+00:21:42.880 --> 00:21:45.039
+and see if there is anything you want to
+
+00:21:45.039 --> 00:21:46.640
+work on.
+
+00:21:46.640 --> 00:21:49.039
+All right. So, since this is a
+
+00:21:49.039 --> 00:21:51.120
+pre-recorded talk I won't be able to do
+
+00:21:51.120 --> 00:21:53.520
+the Q & A real time in the video.
+
+00:21:53.520 --> 00:21:56.080
+However, I will be around on the
+
+00:21:56.080 --> 00:21:57.200
+collaborative pad
+
+00:21:57.200 --> 00:22:00.239
+and the IRC #emacsconf,
+
+00:22:00.239 --> 00:22:01.360
+#emacsconf-questions
+
+00:22:01.360 --> 00:22:04.139
+to answer any questions when it pops up,
+
+00:22:04.139 --> 00:22:05.760
+and you can also submit an issue
+
+00:22:05.760 --> 00:22:09.120
+on the repo, and you can check the wiki
+
+00:22:09.120 --> 00:22:12.640
+for some other guides and tricks.
+
+00:22:12.640 --> 00:22:15.039
+All right. Thank you guys, and hopefully
+
+00:22:15.039 --> 00:22:16.000
+you find
+
+00:22:16.000 --> 00:22:18.320
+this EAF project very interesting, and
+
+00:22:18.320 --> 00:22:24.320
+enjoy the rest of EmacsConf 2020.