basic lettering (#344)

Can handle multiple lines of text and routes the stitching in alternating directions on each line.

1 files changed, 39 insertions, 0 deletions

diff --git a/lib/extensions/lettering.py b/lib/extensions/lettering.py
new file mode 100644
index 00000000..0d6629f8
--- /dev/null
+++ b/lib/extensions/lettering.py
@@ -0,0 +1,39 @@
+import os
+
+from ..i18n import _
+from ..lettering import Font
+from ..svg.tags import SVG_PATH_TAG, SVG_GROUP_TAG, INKSCAPE_LABEL
+from ..utils import get_bundled_dir
+from .commands import CommandsExtension
+
+
+class Lettering(CommandsExtension):
+    COMMANDS = ["trim"]
+
+    def __init__(self, *args, **kwargs):
+        CommandsExtension.__init__(self, *args, **kwargs)
+
+        self.OptionParser.add_option("-t", "--text")
+
+    def effect(self):
+        font_path = os.path.join(get_bundled_dir("fonts"), "small_font")
+        font = Font(font_path)
+        self.ensure_current_layer()
+
+        lines = font.render_text(self.options.text.decode('utf-8'))
+        self.set_labels(lines)
+        self.current_layer.append(lines)
+
+    def set_labels(self, lines):
+        path = 1
+        for node in lines.iterdescendants():
+            if node.tag == SVG_PATH_TAG:
+                node.set("id", self.uniqueId("lettering"))
+
+                # L10N Label for an object created by the Lettering extension
+                node.set(INKSCAPE_LABEL, _("Lettering %d") % path)
+                path += 1
+            elif node.tag == SVG_GROUP_TAG:
+                node.set("id", self.uniqueId("letteringline"))
+
+                # lettering extension already set the label