Emacs supporting pure-gtk3

In this fork, I'm working to make Emacs support pure-gtk3, in order to support Wayland.

Building

You need cairo.

git clone https://github.com/masm11/emacs.git
cd emacs
./autogen.sh
./configure --with-pgtk --with-cairo --with-modules
make

Ignore warnings.

For archlinux users

This repository contains PKGBUILD, so you can install by:

mkdir /tmp/emacs
cd /tmp/emacs
wget https://raw.githubusercontent.com/masm11/emacs/pgtk/PKGBUILD
makepkg -s
sudo pacman -U emacs-pgtk*.tar.xz

Running

./src/emacs

If you want to know whether it is really running on wayland native, then run as follows:

GDK_BACKEND=wayland ./src/emacs

X11 and Wayland

Of course, PGTK supports X11 and Wayland connections.

You can use GDK_BACKEND environment variable and --display option, and you can do (make-frame-on-display display-name) with display-name of different backend from the first frame.

You can know which backend is used for a frame:

(pgtk-backend-display-class)

This returns "GdkWaylandDisplay" for Wayland, or "GdkX11Display" for X11.

Note: Segmentation fault may occur on multiple display environment.

Child Frames

I reimplemented child frames to resolve these issues: #46, #48, and #49.

In this new version, child frames don't extend beyond the parent frame.

Instead of xrdb

X has the resource database, and you could store initial default values into it.

Gtk/Gdk can't handle it even if on X11, so I implemented similar feature using gsettings.

Saving:

(pgtk-set-resource "background" "gray")

Getting:

(x-get-resource "background" "Background")

If your emacs got failing to start, then edit your settings with dconf-editor. Your settings are saved under /org/gnu/emacs/defaults-by-name/<instance-name>/ and /org/gnu/emacs/defaults-by-class/. All are of string type. Correct your mistakes.

TODO

Known problems:

Segmentation fault while multiple-display.
Exits when a connection to display server is closed by peer. (I may not be able to resolve.)

Not implemented:

GTK on wayland does not implement functions for these features:
- x_set_no_focus_on_map
- x_set_no_accept_focus
- x_set_z_group
- auto-raise/lower
GTK does not implement functions for these features:
- vendor_specific_keysyms
Some other features. Keywords:
- gtk_plug (not exists on wayland)
- frame_x_embedded_p

I may not develop them because I don't use them.

Debugging

Edit src/pgtkterm.h to uncomment:

#define PGTK_DEBUG 1

It enables so much debugging outputs.

On gdb, you may want to do:

(gdb) handle SIGPIPE nostop noprint

Input Methods

You should be able to use input methods since GtkIMContext is enabled by default.

If you don't like GtkIMContext, you can disable it by writing as follows in ~/.emacs:

(setq pgtk-use-im-context-on-new-connection nil)

My Environment

archlinux
gtk+ 3.24.23
glib2 2.66.2
gcc 10.2.0
wayland 1.18.0
wayland-protocols 1.20
cairo 1.17.2
freetype2 2.10.4
imagemagick 7.0.10.39
ibus 1.5.23
mozc 2.23.2815.102
wayfire 0.6.0

Notice

We (@masm11 and @fejfighter) are going to push @fejfighter's fork to the fsf's repository, instead of my fork. @fejfighter's one is rebaseable and have English commit messages. See #23.

About me

masm11.