[gtk/msvc-proj-more-data: 4/4] Visual Studio builds: Add optional rules to generate translations

[Chun-wei Fan <fanchunwei src gnome org>]

commit 4af19d4350814e62ec6acc28eb1027933a9aad3d
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Thu Jun 16 18:31:37 2022 +0800

    Visual Studio builds: Add optional rules to generate translations
    
    Add a target in the install-msvc.mak file that enables one to generate
    the translations (.mo) files using msgfmt from the .po catalog files.
    
    Add an entry in config-msvc.mak[.in] so that one can use it to configure
    a custom location for the msgfmt.exe program, since it is harder to
    install with Visual Studio, so that one can use a prebuilt copy from
    Cygwin or MSYS2, for instance.

 win32/README_FEATURES_MSVC.txt | 11 +++++++++++
 win32/config-msvc.mak.in       |  4 ++++
 win32/install-msvc.mak         | 14 +++++++++++++-
 3 files changed, 28 insertions(+), 1 deletion(-)
---
diff --git a/win32/README_FEATURES_MSVC.txt b/win32/README_FEATURES_MSVC.txt
index 2a37aea19f..0cf8efda13 100644
--- a/win32/README_FEATURES_MSVC.txt
+++ b/win32/README_FEATURES_MSVC.txt
@@ -71,3 +71,14 @@ NMake command line.  The gtk3-demo project files will also be updated with the
 appropriate dependent libraries linked in-please check that the project settings 
 contain the correct .lib file names for your system, as they assume the most 
 common names are used there.
+
+=========================
+Building the translations
+=========================
+Building translations is supported via Meson builds or via the Visual Studio projects,
+both of which require a working msgfmt.exe (from gettext-tools, a part of gettext) in the
+PATH, or for the Visual Studio projects, passed into the arguments in "InstallBuildsBase"
+in gtk3-build-defines.[props|vsprops] with MSGFMT=xxx.  For the Visual Studio projects, for
+this to work one needs to also supply a "INSTALL_TRANSLATIONS=1" (without the quotes)
+argument to the same "InstallBuildsBase" in the afore-mentioned property sheet.  Using
+msgfmt.exe from Cygwin or MSYS2 is supported as well.
diff --git a/win32/config-msvc.mak.in b/win32/config-msvc.mak.in
index 26ab2186ba..d3fc362377 100644
--- a/win32/config-msvc.mak.in
+++ b/win32/config-msvc.mak.in
@@ -42,6 +42,10 @@ GDBUS_CODEGEN = $(PREFIX)\bin\gdbus-codegen
 GLIB_COMPILE_SCHEMAS = $(PREFIX)\bin\glib-compile-schemas.exe
 !endif
 
+!ifndef MSGFMT
+MSGFMT = msgfmt
+!endif
+
 !if "$(PLAT)" == "x64"
 AT_PLAT=x86_64
 !elseif "$(PLAT)" == "arm64"
diff --git a/win32/install-msvc.mak b/win32/install-msvc.mak
index 5fe35d8762..b39764727a 100644
--- a/win32/install-msvc.mak
+++ b/win32/install-msvc.mak
@@ -51,7 +51,13 @@ GTK_TYPE_BULITINS_H = .\vs$(VSVER)\$(CFG)\$(PLAT)\obj\gtk-$(GTK_API_VERSION)\gtk
 GTK_VERSION_H = .\vs$(VSVER)\$(CFG)\$(PLAT)\obj\gtk-$(GTK_API_VERSION)\gtk\gtkversion.h
 GTK_GENERATED_PUBLIC_H = $(GTK_TYPE_BULITINS_H) $(GTK_VERSION_H)
 
-all: install-bin install-headers install-data
+!ifdef INSTALL_TRANSLATIONS
+DATA_TARGETS = install-data install-translations
+!else
+DATA_TARGETS = install-data
+!endif
+
+all: install-bin install-headers $(DATA_TARGETS)
 
 # Copy the built files
 install-bin:
@@ -131,3 +137,9 @@ install-data:
        @for %x in (its loc) do @copy ..\gtk\gtkbuilder.%x $(PREFIX)\share\gettext\its
        @for %x in (rng) do @copy ..\gtk\gtkbuilder.%x $(PREFIX)\share\gtk-3.0
        @for %l in (de es fr zh) do @for %f in ($(BASE_BUILT_BIN_DIR)\%l.gresource) do @copy %f 
$(PREFIX)\share\gtk-3.0\emoji
+
+# Generate and install the translations
+install-translations:
+       @for %d in (po po-properties) do @for %l in (..\%d\*.po) do @if not exist 
$(PREFIX)\share\locale\%~nl\LC_MESSAGES\ md $(PREFIX)\share\locale\%~nl\LC_MESSAGES
+       @for %l in (..\po\*.po) do @$(MSGFMT) -c -v -o $(PREFIX)\share\locale\%~nl\LC_MESSAGES\gtk30.mo %l
+       @for %l in (..\po-properties\*.po) do @$(MSGFMT) -c -v -o 
$(PREFIX)\share\locale\%~nl\LC_MESSAGES\gtk30-properties.mo %l