Bug#823386: libgtk-3-0: key bindings are no longer taken into account

[Vincent Lefevre]

Package: libgtk-3-0
Version: 3.20.3-2
Severity: important

I have the following file ~/.config/gtk-3.0/gtk.css with:

@binding-set text-entry
{
  bind "<Control>a"
  {
    "move-cursor" (paragraph-ends, -1, 0)
  };
  bind "<Control>e"
  {
    "move-cursor" (paragraph-ends, 1, 0)
  };
  bind "<Control>k"
  {
    "delete-from-cursor" (paragraph-ends, 1)
  };
  bind "<Control>u"
  {
    "move-cursor" (paragraph-ends, -1, 0)
    "delete-from-cursor" (paragraph-ends, 1)
  };
  bind "<Control>w"
  {
    "delete-from-cursor" (word-ends, -1)
  };
}

GtkEntry
{
  -gtk-key-bindings: text-entry;
}

GtkTextView
{
  -gtk-key-bindings: text-entry;
}

but these key bindings are no longer taken into account. For instance,
Ctrl-a selects the whole text (default binding) instead of putting the
cursor at the beginning of the line. The file is still parsed, though:
errors are reported in the terminal (sent to stderr, I assume) if one
introduces errors.

I have tested this with firefox, gedit and gtk3-widget-factory.

This is a major regression and makes text editing very difficult
when one is used to these bindings, with possible data loss (e.g.
Ctrl-a + some key becomes destructive).

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (500, 'oldstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.5.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libgtk-3-0 depends on:
ii  libatk-bridge2.0-0                      2.20.1-1
ii  libatk1.0-0                             2.20.0-1
ii  libc6                                   2.22-7
ii  libcairo-gobject2                       1.14.6-1+b1
ii  libcairo2                               1.14.6-1+b1
ii  libcolord2                              1.3.2-1
ii  libcups2                                2.1.3-5
ii  libepoxy0                               1.3.1-1
ii  libfontconfig1                          2.11.0-6.4
ii  libfreetype6                            2.6.3-3+b1
ii  libgdk-pixbuf2.0-0                      2.34.0-1
ii  libglib2.0-0                            2.48.0-1
ii  libgtk-3-common                         3.20.3-2
ii  libjson-glib-1.0-0                      1.2.0-1
ii  libpango-1.0-0                          1.40.1-1
ii  libpangocairo-1.0-0                     1.40.1-1
ii  libpangoft2-1.0-0                       1.40.1-1
ii  librest-0.7-0                           0.7.93-1
ii  libsoup2.4-1                            2.54.1-1
ii  libwayland-client0                      1.10.0-2
ii  libwayland-cursor0                      1.10.0-2
ii  libwayland-egl1-mesa [libwayland-egl1]  11.1.3-1
ii  libx11-6                                2:1.6.3-1
ii  libxcomposite1                          1:0.4.4-1
ii  libxcursor1                             1:1.1.14-1+b1
ii  libxdamage1                             1:1.1.4-2+b1
ii  libxext6                                2:1.3.3-1
ii  libxfixes3                              1:5.0.1-2+b2
ii  libxi6                                  2:1.7.6-1
ii  libxinerama1                            2:1.1.3-1+b1
ii  libxkbcommon0                           0.5.0-1
ii  libxml2                                 2.9.3+dfsg1-1
ii  libxrandr2                              2:1.5.0-1
ii  shared-mime-info                        1.6-1

Versions of packages libgtk-3-0 recommends:
ii  libgtk-3-bin  3.20.3-2

Versions of packages libgtk-3-0 suggests:
ii  gvfs             1.28.1-1
ii  librsvg2-common  2.40.15-1

-- no debconf information