meson: build input modules

We have to work around some ordering problems here. We still
manage to keep most of the guts in modules/input/meson.build,
so it's not too ugly overall.

(The autotools build solves this with a 'make -C ../../input/modules'
inside gtk/Makefile, but that's not something we can or want to do.)

2 files changed, 106 insertions, 1 deletions

diff --git a/modules/input/meson.build b/modules/input/meson.build
new file mode 100644
index 0000000000..90be67f922
--- /dev/null
+++ b/modules/input/meson.build
@@ -0,0 +1,105 @@
+# Note: this file is included from the top-level before gtk/meson.build.
+# The actual input modules are then built in gtk/meson.build based on the
+# defs we provide here. It has to be that way because included input methods
+# need to be built before libgtk-4.so is built, so before gtk/meson.build, but
+# all input methods also rely on gtk generated headers to be created first, so
+# there is a bit of an ordering problem which we solve by collecting all the
+# information here but moving the actual build definitions to gtk/meson.build.
+build_dynamic_modules = false
+disable_modules = get_option('disable-modules')
+if not disable_modules
+  runcmd = run_command('pkg-config', '--variable=gmodule_supported', 'gmodule-no-export-2.0')
+  if runcmd.returncode() == 0
+    gmodule_supported = runcmd.stdout().strip()
+    if gmodule_supported == 'true'
+      build_dynamic_modules = true
+    else
+      message('Modules are not supported according to gmodule-no-export-2.0.pc')
+    endif
+  else
+    message('WARNING: failed to query if modules are supported!')
+  endif
+endif
+
+all_immodules = ['am-et', 'cedilla', 'cyrillic-translit', 'inuktitut',
+                 'ipa', 'multipress', 'thai', 'ti-er', 'ti-et', 'viqr']
+
+all_immodules += backend_immodules
+
+# Allow building some or all immodules included
+included_immodules = get_option('with-included-immodules')
+if included_immodules == 'none'
+  included_immodules = ''
+elif included_immodules == 'all' or included_immodules == 'yes'
+  included_immodules = ','.join(all_immodules)
+endif
+
+if included_immodules == ''
+  have_included_immodules = false
+  included_immodules = []
+else
+  have_included_immodules = true
+  included_immodules = included_immodules.split(',')
+endif
+
+foreach im : included_immodules
+  if not all_immodules.contains(im)
+    error('The specified input method "@0@" is not available (available methods: @1@)'.format(im, ', '.join(all_immodules)))
+  endif
+endforeach
+
+immodules_subdir = 'gtk-4.0/@0@/immodules'.format(gtk_binary_version)
+immodules_install_dir = join_paths(get_option('libdir'), immodules_subdir)
+
+sysconfdir = join_paths(get_option('prefix'),get_option('sysconfdir'))
+mp_confdir = join_paths(sysconfdir, 'gtk-4.0')
+mp_cargs = [
+ '-DMULTIPRESS_LOCALEDIR=""', # FIXME: where is $(mplocaledir) ever set?
+ '-DMULTIPRESS_CONFDIR="@0@"'.format(mp_confdir),
+]
+install_data('im-multipress.conf', install_dir : mp_confdir)
+
+method_defs = [
+  ['am-et', files('imam-et.c')],
+  ['cedilla', files('imcedilla.c')],
+  ['cyrillic-translit', files('imcyrillic-translit.c')],
+  ['ti-er', files('imti-er.c')],
+  ['ti-et', files('imti-et.c')],
+  ['thai', files('thai-charprop.c', 'gtkimcontextthai.c', 'imthai.c')],
+  ['viqr', files('imviqr.c')],
+  ['inuktitut', files('iminuktitut.c')],
+  ['ipa', files('imipa.c')],
+  # backend modules
+  ['broadway', files('imbroadway.c')],
+  ['multipress', files('gtkimcontextmultipress.c', 'immultipress.c'), [], mp_cargs],
+  ['quartz', ('imquartz.c'), [], ('-xobjective-c')],
+  ['xim', files('gtkimcontextxim.c', 'imxim.c')],
+  ['ime', files('gtkimcontextime.c', 'imime.c'), ['imm32']],
+]
+
+inc_im_method_defs = []
+dyn_im_method_defs = []
+
+foreach m : method_defs
+  im = m.get(0)
+  srcs = m.get(1)
+  cargs = m.get(3, [])
+  libs = []
+
+  # only use backend-specific input methods for backends that are enabled
+  if all_immodules.contains(im)
+    # check for extra libs lazily
+    foreach libname : m.get(2, [])
+      libs += [cc.find_library(libname)]
+    endforeach
+
+    if included_immodules.contains(im)
+      cdata.set('INCLUDE_IM_@0@'.format(im.underscorify()), true)
+      inc_im_method_defs += [[im, srcs, cargs, libs]]
+    elif build_dynamic_modules
+      dyn_im_method_defs += [[im, srcs, cargs, libs]]
+    endif
+  endif
+endforeach
+
+# TODO: post-install gtk4-query-immodules run to create immodules.c
diff --git a/modules/meson.build b/modules/meson.build
index b855765ab7..d0c4adc81d 100644
--- a/modules/meson.build
+++ b/modules/meson.build
@@ -1,4 +1,4 @@
-#subdir('input')
+# Note: 'input' subdir has already been included from top-level.
 
 if os_unix
   subdir('printbackends')