label: add support for CSS letter-spacing property

Support letter-spacing CSS property on GtkLabel.
Reftest is included.

5 files changed, 70 insertions, 0 deletions

diff --git a/testsuite/reftests/Makefile.am b/testsuite/reftests/Makefile.am
index 3887acc95e..67a918fabe 100644
--- a/testsuite/reftests/Makefile.am
+++ b/testsuite/reftests/Makefile.am
@@ -323,6 +323,9 @@ testdata = \
 	label-width-chars-dont-shrink.ui \
 	label-wrap-justify.ref.ui \
 	label-wrap-justify.ui \
+	letter-spacing.css \
+	letter-spacing.ui \
+	letter-spacing.ref.ui \
 	linear-gradient.css \
 	linear-gradient.ref.ui \
 	linear-gradient.ui \
@@ -498,6 +501,7 @@ libreftest_la_LIBADD = $(gtk_reftest_LDADD)
 libreftest_la_SOURCES =			\
 	expand-expander.c		\
 	label-text-shadow-changes-modify-clip.c	\
+	letter-spacing.c		\
 	set-default-direction.c		\
 	statusbar-remove-all.c		\
 	textview-border-windows.c	\
diff --git a/testsuite/reftests/letter-spacing.c b/testsuite/reftests/letter-spacing.c
new file mode 100644
index 0000000000..5e876f077e
--- /dev/null
+++ b/testsuite/reftests/letter-spacing.c
@@ -0,0 +1,30 @@
+/*
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+
+
+G_MODULE_EXPORT void
+set_letter_spacing (GtkLabel *label)
+{
+  PangoAttrList *attrs;
+
+  attrs = pango_attr_list_new ();
+  pango_attr_list_insert (attrs, pango_attr_letter_spacing_new (10 * PANGO_SCALE));
+  gtk_label_set_attributes (label, attrs);
+  pango_attr_list_unref (attrs);
+}
diff --git a/testsuite/reftests/letter-spacing.css b/testsuite/reftests/letter-spacing.css
new file mode 100644
index 0000000000..9bf4eefcbd
--- /dev/null
+++ b/testsuite/reftests/letter-spacing.css
@@ -0,0 +1,3 @@
+#spaced {
+  letter-spacing: 10px;
+}
diff --git a/testsuite/reftests/letter-spacing.ref.ui b/testsuite/reftests/letter-spacing.ref.ui
new file mode 100644
index 0000000000..f1925ba953
--- /dev/null
+++ b/testsuite/reftests/letter-spacing.ref.ui
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.18.1 -->
+<interface>
+  <requires lib="gtk+" version="3.0"/>
+  <object class="GtkWindow" id="window1">
+    <property name="can_focus">False</property>
+    <property name="type">popup</property>
+    <child>
+      <object class="GtkLabel" id="label1">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="label">abc</property>
+        <signal name="map" handler="reftest:set_letter_spacing" swapped="no"/>
+      </object>
+    </child>
+  </object>
+</interface>
diff --git a/testsuite/reftests/letter-spacing.ui b/testsuite/reftests/letter-spacing.ui
new file mode 100644
index 0000000000..f93785fee4
--- /dev/null
+++ b/testsuite/reftests/letter-spacing.ui
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <!-- interface-requires gtk+ 3.0 -->
+  <object class="GtkWindow" id="window1">
+    <property name="can_focus">False</property>
+    <property name="type">popup</property>
+    <child>
+      <object class="GtkLabel" id="label1">
+        <property name="name">spaced</property>
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="label">abc</property>
+      </object>
+    </child>
+  </object>
+</interface>