Merge branch 'pango-text' of https://github.com/naveen521kk/manim into pango-text

Author: naveen521kk

.gitignore

@@ -16,7 +16,6 @@ eggs/
 .eggs/
 lib/
 lib64/
-windows/
 parts/
 sdist/
 var/

manim/mobject/svg/text_mobject.py

@@ -867,7 +867,7 @@ def text2svg(self):
             fontdesc = pangocffi.FontDescription()
             fontdesc.set_size(pangocffi.units_from_double(size))
             if family:
-                fontdesc.set_family("sans-serif")
+                fontdesc.set_family(family)
             fontdesc.set_style(style)
             fontdesc.set_weight(weight)
             layout.set_font_description(fontdesc)

tests/test_pango.py

@@ -0,0 +1,127 @@
+from manim import PangoText, START_X, START_Y, SVGMobject
+import os
+import cairocffi
+import pangocairocffi
+import pangocffi
+
+rtl_text = """صباح الخير
+مرحبا جميعا"""
+
+width = 600
+height = 400
+
+
+def test_general_text_svgobject():
+    """Checks number of submobjects generated when directly called using ``SVGMobject``"""
+    text = "hello"
+    size = 1
+    folder = os.path.abspath(os.path.join("media", "texts"))
+    if not os.path.exists(folder):
+        os.makedirs(folder)
+    filename = os.path.join(folder, "hello.svg")
+    a = PangoText(text, size=10)
+    pangoManim = os.path.join(folder, a.text2hash() + ".svg")
+    surface = cairocffi.SVGSurface(filename, width, height)
+    context = cairocffi.Context(surface)
+    context.move_to(START_X, START_Y)
+    layout = pangocairocffi.create_layout(context)
+    layout.set_width(pangocffi.units_from_double(width))
+    fontdesc = pangocffi.FontDescription()
+    fontdesc.set_size(pangocffi.units_from_double(size * 10))
+    layout.set_font_description(fontdesc)
+    layout.set_text(text)
+    pangocairocffi.show_layout(context, layout)
+    surface.finish()
+    b = SVGMobject(filename)
+    assert len(a.submobjects) == len(b.submobjects)
+
+
+def test_rtl_text_text_svgobject():
+    """Checks number of submobjects generated when directly called using ``SVGMobject``"""
+    size = 1
+    text = rtl_text
+    folder = os.path.abspath(os.path.join("media", "texts"))
+    if not os.path.exists(folder):
+        os.makedirs(folder)
+    filename = os.path.join(folder, "hello.svg")
+    a = PangoText(text, size=1)
+    pangoManim = os.path.join(folder, a.text2hash() + ".svg")
+    surface = cairocffi.SVGSurface(filename, width, height)
+    context = cairocffi.Context(surface)
+    context.move_to(START_X, START_Y)
+    layout = pangocairocffi.create_layout(context)
+    layout.set_width(pangocffi.units_from_double(width))
+    fontdesc = pangocffi.FontDescription()
+    fontdesc.set_size(pangocffi.units_from_double(size * 10))
+    layout.set_font_description(fontdesc)
+    layout.set_text(text)
+    pangocairocffi.show_layout(context, layout)
+    surface.finish()
+    b = SVGMobject(filename)
+    assert len(a.submobjects) == len(b.submobjects)
+
+
+def test_font_face():
+    """Checks font face using submobject len"""
+    size = 1
+    text = rtl_text
+    font_face = "sans"
+    folder = os.path.abspath(os.path.join("media", "texts"))
+    if not os.path.exists(folder):
+        os.makedirs(folder)
+    filename = os.path.join(folder, "hello.svg")
+    a = PangoText(text, size=1, font=font_face)
+    pangoManim = os.path.join(folder, a.text2hash() + ".svg")
+    surface = cairocffi.SVGSurface(filename, width, height)
+    context = cairocffi.Context(surface)
+    context.move_to(START_X, START_Y)
+    layout = pangocairocffi.create_layout(context)
+    layout.set_width(pangocffi.units_from_double(width))
+    fontdesc = pangocffi.FontDescription()
+    fontdesc.set_family(font_face)
+    fontdesc.set_size(pangocffi.units_from_double(size * 10))
+    layout.set_font_description(fontdesc)
+    layout.set_text(text)
+    pangocairocffi.show_layout(context, layout)
+    surface.finish()
+    b = SVGMobject(filename)
+    assert len(a.submobjects) == len(b.submobjects)
+
+
+def test_whether_svg_file_created():
+    """Checks Whether SVG file is created in desired location"""
+    a = PangoText("hello", size=1)
+    folder = os.path.abspath(os.path.join("media", "texts"))
+    if not os.path.exists(folder):
+        os.makedirs(folder)
+    theoPath = os.path.abspath(os.path.join(folder, a.text2hash() + ".svg"))
+    actualPath = os.path.abspath(a.text2svg())
+    assert theoPath == actualPath
+
+
+def test_tabs_replace():
+    """Checks whether are there in end svg image. Pango should handle tabs and line breaks."""
+    size = 1
+    folder = os.path.abspath(os.path.join("media", "texts"))
+    if not os.path.exists(folder):
+        os.makedirs(folder)
+    a = PangoText("hello\thi\nf")
+    assert a.text == "hellohif"
+    pangoManim = os.path.join(folder, a.text2hash() + ".svg")
+    filename = os.path.join(folder, "hello.svg")
+    surface = cairocffi.SVGSurface(filename, width, height)
+    context = cairocffi.Context(surface)
+    context.move_to(START_X, START_Y)
+    layout = pangocairocffi.create_layout(context)
+    layout.set_width(pangocffi.units_from_double(width))
+    fontdesc = pangocffi.FontDescription()
+    fontdesc.set_size(pangocffi.units_from_double(size * 10))
+    layout.set_font_description(fontdesc)
+    layout.set_text("hello\thi\nf")
+    pangocairocffi.show_layout(context, layout)
+    surface.finish()
+    b = SVGMobject(filename)
+    assert len(a.submobjects) == len(b.submobjects)
+
+
+test_tabs_replace()