Add ability to ellipsize dynamic menu item lengths.

 Plus making the maximum length of non-ellipsized strings configurable
 via GSettings.

 - data/org.ayatana.common.gschema.xml.in: Add file.
 - data/CMakeLists.txt: Add file.
 - CMakeLists.txt: Add gio-2.0 dependency + 'data' build folder.
 - src/utils.*: Add ayatana_common_utils_elipsize function + include
   glib-object.h and gio.h
 - tests/tst_utils.cpp: Add StringFunctionsTest.
 - tests/CMakeLists.txt: Add GLIB_LIBRARIES to target.

2 files changed, 30 insertions, 0 deletions

diff --git a/src/utils.c b/src/utils.c
index d735172..1d21b02 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -273,3 +273,29 @@ ayatana_common_utils_zenity_warning (const char * icon_name,
   g_free (zenity);
   return confirmed;
 }
+
+void ayatana_common_utils_elipsize(char *sText)
+{
+    guint nMaxLetters = 50;
+    glong nLetters = g_utf8_strlen(sText, -1);
+    GSettingsSchemaSource *pSource = g_settings_schema_source_get_default();
+
+    if (pSource != NULL)
+    {
+        GSettingsSchema *pSchema = g_settings_schema_source_lookup(pSource, "org.ayatana.common", FALSE);
+
+        if (pSchema != NULL)
+        {
+            g_settings_schema_unref(pSchema);
+            GSettings *pSettings = g_settings_new("org.ayatana.common");
+            nMaxLetters = g_settings_get_uint(pSettings, "max-menu-text-length");
+            g_object_unref(pSettings);
+        }
+    }
+
+    if (nLetters > nMaxLetters + 4)
+    {
+        gchar *pLastChar = g_utf8_offset_to_pointer(sText, nMaxLetters);
+        memcpy(pLastChar, "...\0", 4);
+    }
+}
diff --git a/src/utils.h b/src/utils.h
index 0fa643b..13e2d2f 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -19,6 +19,8 @@
 #pragma once
 
 #include <glib.h>
+#include <glib-object.h>
+#include <gio/gio.h>
 
 #define DESKTOP_LOMIRI  "Lomiri"
 #define DESKTOP_UNITY  "Unity"
@@ -47,3 +49,5 @@ gboolean ayatana_common_utils_execute_command(const gchar * cmd);
 gboolean ayatana_common_utils_open_url(const gchar * url);
 gboolean ayatana_common_utils_have_program(const gchar * program);
 gboolean ayatana_common_utils_zenity_warning(const char *icon_name, const char *title, const char *text);
+
+void ayatana_common_utils_elipsize(char *sText);