From c2685d9a6395fd6efb6b7cc2be28414c7fef2b5e Mon Sep 17 00:00:00 2001
From: Matthew Barnes <mbarnes@redhat.com>
Date: Thu, 4 Mar 2010 16:31:17 -0500
Subject: Forgot to commit the new source files...

---
 e-util/e-ui-manager.c | 333 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 333 insertions(+)
 create mode 100644 e-util/e-ui-manager.c

(limited to 'e-util/e-ui-manager.c')

diff --git a/e-util/e-ui-manager.c b/e-util/e-ui-manager.c
new file mode 100644
index 0000000000..c6a73042f0
--- /dev/null
+++ b/e-util/e-ui-manager.c
@@ -0,0 +1,333 @@
+/*
+ * e-ui-manager.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+#include "e-ui-manager.h"
+
+#include <string.h>
+
+#define E_UI_MANAGER_GET_PRIVATE(obj) \
+	(G_TYPE_INSTANCE_GET_PRIVATE \
+	((obj), E_TYPE_UI_MANAGER, EUIManagerPrivate))
+
+/*
+ * --- NOTE TO SELF ---
+ *
+ * While creating this class I was tempted to add an "id" property which
+ * EPluginUI could extract from a given EUIManager instead of having the
+ * public EPluginUI functions take a separate "id" argument.  Seemed like
+ * a nice cleanup until I remembered that an EUIManager instance can have
+ * multiple IDs ("aliases"), as in the case of EShellWindow's UI manager.
+ * So the UI Manager ID and the instance still need to be kept separate.
+ *
+ * Mentioning it here in case I forget why I didn't go through with it.
+ */
+
+struct _EUIManagerPrivate {
+	guint express_mode : 1;
+};
+
+enum {
+	PROP_0,
+	PROP_EXPRESS_MODE
+};
+
+static gpointer parent_class;
+
+static void
+ui_manager_set_property (GObject *object,
+                         guint property_id,
+                         const GValue *value,
+                         GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_EXPRESS_MODE:
+			e_ui_manager_set_express_mode (
+				E_UI_MANAGER (object),
+				g_value_get_boolean (value));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+ui_manager_get_property (GObject *object,
+                         guint property_id,
+                         GValue *value,
+                         GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_EXPRESS_MODE:
+			g_value_set_boolean (
+				value, e_ui_manager_get_express_mode (
+				E_UI_MANAGER (object)));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static gchar *
+ui_manager_filter_ui (EUIManager *ui_manager,
+                      const gchar *ui_definition)
+{
+	gchar **lines;
+	gchar *filtered;
+	gboolean express_mode;
+	gboolean in_conditional = FALSE;
+	gboolean include = TRUE;
+	gint ii;
+
+	express_mode = e_ui_manager_get_express_mode (ui_manager);
+
+	/*
+	 * Very simple line based pre-processing based on comments:
+	 * <!-- if [!]EXPRESS -->\n ... \n<!-- endif -->\n
+	 */
+
+	lines = g_strsplit (ui_definition, "\n", -1);
+
+	for (ii = 0; lines[ii] != NULL; ii++) {
+		gchar *cp;
+
+		if ((cp = strstr (lines[ii], "<!-- if "))) {
+			gboolean not_express = lines[ii][8] == '!';
+			include = express_mode ^ not_express;
+			lines[ii][0] = '\0';
+			in_conditional = TRUE;
+		} else if ((cp = strstr (lines[ii], "<!-- endif"))) {
+			lines[ii][0] = '\0';
+			include = TRUE;
+			in_conditional = FALSE;
+		}
+		if (!include)
+			lines[ii][0] = '\0';
+	}
+
+	filtered = g_strjoinv ("\n", lines);
+
+	g_strfreev (lines);
+
+	return filtered;
+}
+
+static void
+ui_manager_class_init (EUIManagerClass *class)
+{
+	GObjectClass *object_class;
+
+	parent_class = g_type_class_peek_parent (class);
+	g_type_class_add_private (class, sizeof (EUIManagerPrivate));
+
+	object_class = G_OBJECT_CLASS (class);
+	object_class->set_property = ui_manager_set_property;
+	object_class->get_property = ui_manager_get_property;
+
+	class->filter_ui = ui_manager_filter_ui;
+
+	g_object_class_install_property (
+		object_class,
+		PROP_EXPRESS_MODE,
+		g_param_spec_boolean (
+			"express-mode",
+			"Express Mode",
+			NULL,
+			FALSE,
+			G_PARAM_READWRITE |
+			G_PARAM_CONSTRUCT));
+}
+
+static void
+ui_manager_init (EUIManager *ui_manager)
+{
+	ui_manager->priv = E_UI_MANAGER_GET_PRIVATE (ui_manager);
+}
+
+GType
+e_ui_manager_get_type (void)
+{
+	static GType type = 0;
+
+	if (G_UNLIKELY (type == 0)) {
+		static const GTypeInfo type_info = {
+			sizeof (EUIManagerClass),
+			(GBaseInitFunc) NULL,
+			(GBaseFinalizeFunc) NULL,
+			(GClassInitFunc) ui_manager_class_init,
+			(GClassFinalizeFunc) NULL,
+			NULL,  /* class_data */
+			sizeof (EUIManager),
+			0,     /* n_preallocs */
+			(GInstanceInitFunc) ui_manager_init,
+			NULL   /* value_table */
+		};
+
+		type = g_type_register_static (
+			GTK_TYPE_UI_MANAGER, "EUIManager", &type_info, 0);
+	}
+
+	return type;
+}
+
+/**
+ * e_ui_manager_new:
+ *
+ * Returns a new #EUIManager instance.
+ *
+ * Returns: a new #EUIManager instance
+ **/
+GtkUIManager *
+e_ui_manager_new (void)
+{
+	return g_object_new (E_TYPE_UI_MANAGER, NULL);
+}
+
+/**
+ * e_ui_manager_get_express_mode:
+ * @ui_manager: an #EUIManager
+ *
+ * Returns the "express mode" flag in @ui_manager.
+ *
+ * Returns: %TRUE if @ui_manager is set to express mode
+ **/
+gboolean
+e_ui_manager_get_express_mode (EUIManager *ui_manager)
+{
+	g_return_val_if_fail (E_IS_UI_MANAGER (ui_manager), FALSE);
+
+	return ui_manager->priv->express_mode;
+}
+
+/**
+ * e_ui_manager_set_express_mode:
+ * @ui_manager: an #EUIManager
+ * @express_mode: express mode flag
+ *
+ * Sets the "express mode" flag in @ui_manager, which influences how
+ * UI definitions are loaded.
+ **/
+void
+e_ui_manager_set_express_mode (EUIManager *ui_manager,
+                               gboolean express_mode)
+{
+	g_return_if_fail (E_IS_UI_MANAGER (ui_manager));
+
+	ui_manager->priv->express_mode = express_mode;
+
+	g_object_notify (G_OBJECT (ui_manager), "express-mode");
+}
+
+/**
+ * e_ui_manager_add_ui_from_file:
+ * @ui_manager: an #EUIManager
+ * @basename: basename of the UI definition file
+ *
+ * Loads a UI definition into @ui_manager from Evolution's UI directory.
+ * If the EUIManager:express-mode property is %TRUE, a simplified version
+ * of the UI may be presented.
+ *
+ * Failure here is fatal, since the application can't function without
+ * its core UI definitions.
+ *
+ * Returns: The merge ID for the merged UI.  The merge ID can be used to
+ *          unmerge the UI with gtk_ui_manager_remove_ui().
+ **/
+guint
+e_ui_manager_add_ui_from_file (EUIManager *ui_manager,
+                               const gchar *basename)
+{
+	EUIManagerClass *class;
+	gchar *filename;
+	gchar *contents;
+	guint merge_id = 0;
+	GError *error = NULL;
+
+	g_return_val_if_fail (E_IS_UI_MANAGER (ui_manager), 0);
+	g_return_val_if_fail (basename != NULL, 0);
+
+	class = E_UI_MANAGER_GET_CLASS (ui_manager);
+	g_return_val_if_fail (class->filter_ui != NULL, 0);
+
+	filename = g_build_filename (EVOLUTION_UIDIR, basename, NULL);
+
+	if (g_file_get_contents (filename, &contents, NULL, &error)) {
+		gchar *filtered;
+
+		/* We could call e_ui_manager_add_ui_from_string() here,
+		 * but if an error occurs we'd like to include the file
+		 * name in the error message. */
+
+		filtered = class->filter_ui (ui_manager, contents);
+
+		merge_id = gtk_ui_manager_add_ui_from_string (
+			GTK_UI_MANAGER (ui_manager), filtered, -1, &error);
+
+		g_free (filtered);
+		g_free (contents);
+	}
+
+	g_free (filename);
+
+	if (error != NULL) {
+		g_error ("%s: %s", basename, error->message);
+		g_assert_not_reached ();
+	}
+
+	return merge_id;
+}
+
+/**
+ * e_ui_manager_add_ui_from_string:
+ * @ui_manager: an #EUIManager
+ * @ui_definition: the UI XML in NULL terminated string form
+ * @error: return location for a #GError, or %NULL
+ *
+ * Loads the given UI definition into @ui_manager.  If the
+ * EUIManager:express-mode property is %TRUE, a simplified version of
+ * the UI may be presented.
+ *
+ * Failure here is <i>not</i> fatal, since the function is primarily
+ * used to load UI definitions for plugins, which we can get by without.
+ *
+ * Returns: The merge ID for the merged UI.  The merge ID can be used to
+ *          unmerge the UI with gtk_ui_manager_remove_ui().
+ **/
+guint
+e_ui_manager_add_ui_from_string (EUIManager *ui_manager,
+                                 const gchar *ui_definition,
+                                 GError **error)
+{
+	EUIManagerClass *class;
+	gchar *filtered;
+	guint merge_id;
+
+	g_return_val_if_fail (E_IS_UI_MANAGER (ui_manager), 0);
+	g_return_val_if_fail (ui_definition != NULL, 0);
+
+	class = E_UI_MANAGER_GET_CLASS (ui_manager);
+	g_return_val_if_fail (class->filter_ui != NULL, 0);
+
+	filtered = class->filter_ui (ui_manager, ui_definition);
+
+	merge_id = gtk_ui_manager_add_ui_from_string (
+		GTK_UI_MANAGER (ui_manager), filtered, -1, error);
+
+	g_free (filtered);
+
+	return merge_id;
+}
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