[gtk+/wip/meson: 25/135] meson: Generate demos.h for gtk3-demo

[Emmanuele Bassi <ebassi src gnome org>]

commit 14af0d59281a38ad44d74e4f58003b5aa4d1eecf
Author: Timm Bäder <mail baedert org>
Date:   Tue Sep 20 16:29:14 2016 +0200

    meson: Generate demos.h for gtk3-demo

 demos/gtk-demo/geninclude.py |  108 ++++++++++++++++++++++++++++++++++++++++++
 demos/gtk-demo/meson.build   |   33 ++++++++++--
 gdk/meson.build              |    1 +
 gtk/meson.build              |    5 ++-
 meson.build                  |   26 +++++++++-
 5 files changed, 164 insertions(+), 9 deletions(-)
---
diff --git a/demos/gtk-demo/geninclude.py b/demos/gtk-demo/geninclude.py
new file mode 100755
index 0000000..57038a4
--- /dev/null
+++ b/demos/gtk-demo/geninclude.py
@@ -0,0 +1,108 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import sys
+import re
+import os
+from collections import *
+
+out_file = sys.argv[1]
+in_files = sys.argv[2:]
+
+
+file_output = """
+typedef GtkWidget *(*GDoDemoFunc) (GtkWidget *do_widget);
+
+typedef struct _Demo Demo;
+
+struct _Demo
+{
+  gchar *name;
+  gchar *title;
+  gchar *filename;
+  GDoDemoFunc func;
+  Demo *children;
+};
+
+"""
+
+# Demo = namedtuple('Demo', ['name', 'title', 'file', 'func'])
+
+demos = []
+
+for demo_file in in_files:
+    filename =  demo_file[demo_file.rfind('/')+1:]
+    demo_name = filename.replace(".c", "")
+    with open(demo_file, 'r') as f:
+        title = f.readline().replace("/*", "").strip()
+
+
+    file_output += "GtkWidget *do_" + demo_name + " (GtkWidget *do_widget);\n"
+    # demos += Demo(name = demo_name,
+                  # title = title,
+                  # file = demo_file,
+                  # func = "do_" + title)
+    demos.append((demo_name, title, filename, "do_" + demo_name, -1))
+
+# Generate a List of "Parent names"
+parents = []
+parent_ids = []
+parent_index = 0
+for demo in demos:
+    if "/" in demo[1]:
+        slash_index = demo[1].index('/')
+        parent_name = demo[1][:slash_index]
+        do_break = False
+
+        # Check for duplicates
+        if not parent_name in parents:
+            parents.append(parent_name)
+            parent_ids.append(parent_index)
+            demos.append(("NULL", parent_name, "NULL", "NULL", parent_index))
+
+        parent_index = parent_index + 1
+
+
+# For every child with a parent, generate a list of child demos
+i = 0
+for parent in parents:
+    id = parent_ids[i]
+    file_output += "\nDemo child" + str(id) + "[] = {\n"
+    # iterate over all demos and check if the name starts with the given parent name
+    for child in demos:
+        if child[1].startswith(parent + "/"):
+            title = child[1][child[1].rfind('/') + 1:]
+            file_output += "  { \"" + child[0] + "\", \"" + title + "\", \"" + child[2] + "\", " + child[3] 
+ ", NULL },\n"
+
+
+    file_output += "  { NULL }\n};\n"
+    i = i + 1
+
+
+# Sort demos by title
+demos = sorted(demos, key=lambda x: x[1])
+
+file_output += "\nDemo gtk_demos[] = {\n"
+for demo in demos:
+    # Do not generate one of these for demos with a parent demo
+    if "/" not in demo[1]:
+        child_array = "NULL"
+        name = demo[0];
+        title = demo[1];
+        file = demo[2]
+        if name != "NULL":
+            name = "\"" + name + "\""
+        if title != "NULL":
+            title = "\"" + title + "\""
+        if file != "NULL":
+            file = "\"" + file + "\""
+
+        if demo[4] != -1:
+            child_array = "child" + str(demo[4])
+        file_output += "  { " + name + ", " + title + ", " + file + ", " + demo[3] + ", " + child_array + " 
},\n"
+
+file_output += "  { NULL }\n};\n"
+
+ofile = open(out_file, "w")
+ofile.write(file_output)
+ofile.close()
diff --git a/demos/gtk-demo/meson.build b/demos/gtk-demo/meson.build
index 2edfdc0..c4cdd9c 100644
--- a/demos/gtk-demo/meson.build
+++ b/demos/gtk-demo/meson.build
@@ -1,4 +1,7 @@
-demos_base = files([
+
+## These should be in the order you want them to appear in the
+## demo app, which means alphabetized by demo title, not filename
+demos = files([
   'application_demo.c',
   'assistant.c',
   'builder.c',
@@ -65,16 +68,33 @@ demos_base = files([
   'toolpalette.c',
   'transparent.c',
   'tree_store.c',
-
-      'font_features.c', #TODO: IF BUILD_FONT_DEMO
-  'pagesetup.c' #TODO: IF OS_UNIX
 ])
 
-gtkdemo_sources = demos_base + files([
+
+gtkdemo_deps = [libgtk_dep]
+
+if build_font_demo
+  demos += files('font_features.c')
+  gtkdemo_deps += harfbuzz_dep
+endif
+
+if os_unix
+  demos += files('pagesetup.c')
+endif
+
+gtkdemo_sources = demos + files([
   'main.c',
 ])
 
 
+geninclude = find_program('geninclude.py')
+demos_h = custom_target(
+  'gtk3 demo header',
+  output  : 'demos.h',
+  input   : demos,
+  command : [geninclude, '@OUTPUT@', '@INPUT@'],
+)
+
 gtkdemo_resources = gnome.compile_resources(
   'gtkdemo_resources',
   'demo.gresource.xml',
@@ -84,8 +104,9 @@ gtkdemo_resources = gnome.compile_resources(
 gtkdemo = executable(
   'gtk3-demo',
   gtkdemo_sources,
+  demos_h,
   gtkdemo_resources,
-  dependencies: [libgtk_dep, harfbuzz_dep],
+  dependencies: gtkdemo_deps,
   include_directories : confinc,
   gui_app: true
 )
diff --git a/gdk/meson.build b/gdk/meson.build
index 583a906..ac2ba34 100644
--- a/gdk/meson.build
+++ b/gdk/meson.build
@@ -366,6 +366,7 @@ endif
 
 libgdk = shared_library('gdk',
   gdk_sources,
+  gdkenum_h,
   c_args: ['-DHAVE_CONFIG_H', '-DGDK_COMPILATION'],
   include_directories: [confinc, xinc, wlinc],
   dependencies: gdk_deps,
diff --git a/gtk/meson.build b/gtk/meson.build
index 9aeaf4a..f2c6379 100644
--- a/gtk/meson.build
+++ b/gtk/meson.build
@@ -785,7 +785,6 @@ gtk_deps = [
   glib_dep,
   atkbridge_dep,
   pangocairo_dep,
-  pangoft_dep,
   pango_dep,
   cairogobj_dep,
   cairo_dep,
@@ -804,6 +803,7 @@ if x11_enabled
   gtk_deps += [
     xi_dep,
     x11_dep,
+    pangoft_dep
   ]
 endif
 
@@ -812,6 +812,9 @@ if wayland_enabled
     gtk_wayland_sources,
     gtk_use_wayland_or_x11_c_sources
   ]
+  gtk_deps += [
+    pangoft_dep
+  ]
 endif
 
 libgtk = shared_library('gtk',
diff --git a/meson.build b/meson.build
index 07fc5d6..40c161b 100644
--- a/meson.build
+++ b/meson.build
@@ -33,6 +33,25 @@ mkenum = find_program('build_enum.py')
 perl = find_program('perl')
 glib_mkenums = find_program('glib-mkenums')
 
+os_unix   = false
+os_linux  = false
+os_win32  = false
+os_darwin = false
+
+if host_machine.system().contains('darwin')
+  os_darwin = true
+elif host_machine.system().contains('mingw')
+  os_win32 = true
+elif host_machine.system().contains('linux')
+  os_linux = true
+endif
+
+os_unix = not os_win32
+
+build_font_demo = false
+
+
+
 
 cc = meson.get_compiler('c')
 cdata = configuration_data()
@@ -154,7 +173,7 @@ xcomposite_dep = dependency('xcomposite')
 glib_dep       = dependency('glib-2.0', version: '>= 2.49.4')
 giounix_dep    = dependency('gio-unix-2.0', required : false)
 pango_dep      = dependency('pango', version: '>=1.37.3')
-pangoft_dep    = dependency('pangoft2')
+pangoft_dep    = dependency('pangoft2', required: wayland_enabled or x11_enabled)
 cairo_dep      = dependency('cairo')
 pangocairo_dep = dependency('pangocairo')
 cairogobj_dep  = dependency('cairo-gobject')
@@ -172,7 +191,10 @@ wlprotocolsdep = dependency('wayland-protocols', version: '>= 1.7')
 wlcursordep    = dependency('wayland-cursor')
 wlegldep       = dependency('wayland-egl')
 xrandr_dep     = dependency('xrandr')
-harfbuzz_dep   = dependency('harfbuzz', version: '>= 0.9')
+
+
+harfbuzz_dep   = dependency('harfbuzz', version: '>= 0.9', required: false)
+build_font_demo = harfbuzz_dep.found() and pangoft_dep.found()
 
 if giounix_dep.found()
   cdata.set('HAVE_GIO_UNIX', 1)