Hides the last visible child at the end of an animation only if the
leaflet is folded. This avoids children to become incorrectly invisible
at the end of the transition when the leaflet is unfolded.

Librem5/libhandy#32

Previously it was initialized only inside the if branch, and was left
uninitialized left for the rest of the scope.

The variable is unsigned.

and fix the fallout.

This would have caught

    Librem5/libhandy!94

right away.

This avoids falling into the default error case when getting a column's
maximum width.

Let's not live in the past: we want to test for the future. This also
avoid our users to install an old runtime when they may already have
master installed.

HdyColumn was previously missing from libhandy.xml, meaning that
it could not be used or previewed from Glade. This commit adds
HdyColumn to the file.

Fixes Librem5/libhandy#16

When a separator is between two header bars it will take a special
style, better fitting its purpose. This moves the start header bar and
the separator following it into a box so they remain a single entity to
use in size groups, while making the separator a sibling of the header
bar to benefit from this special style.

This reveals the following bug in GTK+:
https://gitlab.gnome.org/GNOME/gtk/issues/1231

DialerButton: free letters

See merge request Librem5/libhandy!83

column: Fix height for width request

See merge request Librem5/libhandy!82

Use the width allocated to the child instead of the width allocated to
the column to compute the height requested by the column.

This avoids children whose height depends on their allocated width to be
cropped at the bottom of the column because it doesn't request enough
height.

Replace phone-dial-symbolic by call-start-symbolic

See merge request Librem5/libhandy!79

Silence all gtk-doc warnings and make sure they don't creep back in

See merge request Librem5/libhandy!78

Drop the custom phone-dial-symbolic icon to use call-start-symbolic,
which available in Adwaita, looks similar enough and is used in
application mockups.

There doesn't seem to be a way to make gtk-doc warnings fatal
so look for warnings in a build log.

This fixes more gtk-doc warnings (dropped empty lines for brevity):

    Building documentation for libhandy
    In gtk-doc.xsl: For acronym (transfer none) no value found!
    In gtk-doc.xsl: For acronym (transfer none) no value found!
    In gtk-doc.xsl: For acronym (nullable) no value found!
    In gtk-doc.xsl: For acronym (transfer none) no value found!
    In gtk-doc.xsl: For acronym (transfer none) no value found!

This makes gtk-doc ignore the macro which avoids these warnings (and
dead index entries):

    Building documentation for libhandy
    html/api-index-full.html:265: warning: no link for: "HANDY-INSIDE:CAPS" -> (HANDY_INSIDE).
    html/api-index-full.html:265: warning: no link for: "libhandy-handy" -> (handy).

Fixes these gtk-doc warnings:

  ./libhandy-unused.txt:1: warning: 2 unused declarations. They should be added to libhandy-sections.txt in the appropriate place.

Fixes another gtk-doc warning. This is an API break but I don't think
anybody bothers atm.

Fixes this gtk-doc warning:

  html/HdyLeaflet.html:873: warning: no link for: "HdyLeaflet-todos" -> (<span class="type">“todos”</span>).

Note that one slot for future signals might be too little but extending
this (which is an ABI break) should be done in a separate patch.

This brings down the number of gtk-doc warnings significantly by fixing:

    unknown:0: warning: Value descriptions for GtkProgressState are missing in source code comment block.
    unknown:0: warning: Field descriptions for struct GtkProgressTracker are missing in source code comment block.
    libhandy/src/gtkprogresstracker.c:227: warning: Parameter description for gtk_progress_tracker_get_progress::reversed is not used from source code comment block.
    libhandy/src/gtkprogresstracker.c:227: warning: Parameter description for gtk_progress_tracker_get_progress::reverse is missing in source code comment block.
    libhandy/src/gtkprogresstracker.c:261: warning: Parameter description for gtk_progress_tracker_get_ease_out_cubic::reversed is not used from source code comment block.
    libhandy/src/gtkprogresstracker.c:261: warning: Parameter description for gtk_progress_tracker_get_ease_out_cubic::reverse is missing in source code comment block.

arrows: test object construction

See merge request Librem5/libhandy!76

Signed-off-by: Guido Günther <agx@sigxcpu.org>

gitlab-ci: Build on Debian buster using provided build-deps

See merge request Librem5/libhandy!77

This checks if we can build on Debian buster using the build-deps
provided in the control file.