feat: centralize theming in theme-manager (palette/tokens, CSS, dark-mode, setup UI), add tests + win32/meson wiring

src/common/theme-service.c

@@ -0,0 +1,176 @@
+#include <errno.h>
+
+#include <gio/gio.h>
+#include <glib/gstdio.h>
+
+#include "cfgfiles.h"
+#include "zoitechat.h"
+#include "theme-service.h"
+
+static zoitechat_theme_post_apply_callback zoitechat_theme_post_apply_cb;
+
+static gboolean
+zoitechat_theme_service_copy_file (const char *src, const char *dest, GError **error)
+{
+	char *data = NULL;
+	gsize len = 0;
+
+	if (!g_file_get_contents (src, &data, &len, error))
+		return FALSE;
+
+	if (!g_file_set_contents (dest, data, len, error))
+	{
+		g_free (data);
+		return FALSE;
+	}
+
+	g_free (data);
+	return TRUE;
+}
+
+char *
+zoitechat_theme_service_get_themes_dir (void)
+{
+	return g_build_filename (get_xdir (), "themes", NULL);
+}
+
+static gboolean
+zoitechat_theme_service_validate (const char *theme_name,
+                                  char **colors_src,
+                                  char **events_src,
+                                  GError **error)
+{
+	char *themes_dir;
+	char *theme_dir;
+
+	if (!theme_name || !*theme_name)
+	{
+		g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
+		             _("No theme name specified."));
+		return FALSE;
+	}
+
+	themes_dir = zoitechat_theme_service_get_themes_dir ();
+	theme_dir = g_build_filename (themes_dir, theme_name, NULL);
+	g_free (themes_dir);
+
+	*colors_src = g_build_filename (theme_dir, "colors.conf", NULL);
+	*events_src = g_build_filename (theme_dir, "pevents.conf", NULL);
+
+	if (!g_file_test (*colors_src, G_FILE_TEST_IS_REGULAR))
+	{
+		g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND,
+		             _("This theme is missing a colors.conf file."));
+		g_free (*events_src);
+		g_free (*colors_src);
+		*events_src = NULL;
+		*colors_src = NULL;
+		g_free (theme_dir);
+		return FALSE;
+	}
+
+	g_free (theme_dir);
+	return TRUE;
+}
+
+gboolean
+zoitechat_theme_service_apply (const char *theme_name, GError **error)
+{
+	char *colors_src = NULL;
+	char *colors_dest = NULL;
+	char *events_src = NULL;
+	char *events_dest = NULL;
+	gboolean ok = FALSE;
+
+	if (!zoitechat_theme_service_validate (theme_name, &colors_src, &events_src, error))
+		return FALSE;
+
+	colors_dest = g_build_filename (get_xdir (), "colors.conf", NULL);
+	events_dest = g_build_filename (get_xdir (), "pevents.conf", NULL);
+
+	if (!zoitechat_theme_service_copy_file (colors_src, colors_dest, error))
+		goto cleanup;
+
+	if (g_file_test (events_src, G_FILE_TEST_IS_REGULAR))
+	{
+		if (!zoitechat_theme_service_copy_file (events_src, events_dest, error))
+			goto cleanup;
+	}
+	else if (g_file_test (events_dest, G_FILE_TEST_EXISTS))
+	{
+		if (g_unlink (events_dest) != 0)
+		{
+			g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
+			             _("Failed to remove existing event settings."));
+			goto cleanup;
+		}
+	}
+
+	zoitechat_theme_service_run_post_apply_callback ();
+	ok = TRUE;
+
+cleanup:
+	g_free (events_dest);
+	g_free (events_src);
+	g_free (colors_dest);
+	g_free (colors_src);
+	return ok;
+}
+
+GStrv
+zoitechat_theme_service_discover_themes (void)
+{
+	char *themes_dir;
+	GDir *dir;
+	const char *name;
+	GPtrArray *themes;
+	GStrv result;
+
+	themes_dir = zoitechat_theme_service_get_themes_dir ();
+	if (!g_file_test (themes_dir, G_FILE_TEST_IS_DIR))
+		g_mkdir_with_parents (themes_dir, 0700);
+
+	themes = g_ptr_array_new_with_free_func (g_free);
+	dir = g_dir_open (themes_dir, 0, NULL);
+	if (dir)
+	{
+		while ((name = g_dir_read_name (dir)))
+		{
+			char *theme_dir = g_build_filename (themes_dir, name, NULL);
+			char *colors_path;
+
+			if (!g_file_test (theme_dir, G_FILE_TEST_IS_DIR))
+			{
+				g_free (theme_dir);
+				continue;
+			}
+
+			colors_path = g_build_filename (theme_dir, "colors.conf", NULL);
+			if (g_file_test (colors_path, G_FILE_TEST_IS_REGULAR))
+				g_ptr_array_add (themes, g_strdup (name));
+
+			g_free (colors_path);
+			g_free (theme_dir);
+		}
+		g_dir_close (dir);
+	}
+
+	g_ptr_array_sort (themes, (GCompareFunc) g_strcmp0);
+	g_ptr_array_add (themes, NULL);
+	result = (GStrv) g_ptr_array_free (themes, FALSE);
+	g_free (themes_dir);
+	return result;
+}
+
+void
+zoitechat_theme_service_set_post_apply_callback (zoitechat_theme_post_apply_callback callback)
+{
+	zoitechat_theme_post_apply_cb = callback;
+}
+
+void
+zoitechat_theme_service_run_post_apply_callback (void)
+{
+	if (zoitechat_theme_post_apply_cb)
+		zoitechat_theme_post_apply_cb ();
+}