1 files changed, 224 insertions, 0 deletions

diff --git a/music_sampler/sysfont.py b/music_sampler/sysfont.py
new file mode 100644
index 0000000..f47693e
--- /dev/null
+++ b/music_sampler/sysfont.py
@@ -0,0 +1,224 @@
+# This file was imported from
+# https://bitbucket.org/marcusva/python-utils/overview
+# And slightly adapted
+
+"""OS-specific font detection."""
+import os
+import sys
+from subprocess import Popen, PIPE
+
+if sys.platform in ("win32", "cli"):
+    import winreg
+
+__all__ = ["STYLE_NORMAL", "STYLE_BOLD", "STYLE_ITALIC", "STYLE_LIGHT",
+           "init", "list_fonts", "get_fonts", "get_font"
+           ]
+
+# Font cache entries:
+# { family : [...,
+#             (name, styles, fonttype, filename)
+#             ...
+#            ]
+# }
+__FONTCACHE = None
+
+
+STYLE_NONE   = 0x00
+STYLE_NORMAL = 0x01
+STYLE_BOLD   = 0x02
+STYLE_ITALIC = 0x04
+STYLE_LIGHT  = 0x08
+STYLE_MEDIUM = 0x10
+
+def _add_font(family, name, styles, fonttype, filename):
+    """Adds a font to the internal font cache."""
+    global __FONTCACHE
+
+    if family not in __FONTCACHE:
+        __FONTCACHE[family] = []
+    __FONTCACHE[family].append((name, styles, fonttype, filename))
+
+
+def _cache_fonts_win32():
+    """Caches fonts on a Win32 platform."""
+    key = "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Fonts"
+    regfonts = []
+    try:
+        with winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, key) as fontkey:
+            idx = 0
+            enumval = winreg.EnumValue
+            rappend = regfonts.append
+            while True:
+                rappend(enumval(fontkey, idx)[:2])
+                idx += 1
+    except WindowsError:
+        pass
+
+    # TODO: integrate alias handling for fonts within the registry.
+    # TODO: Scan and index fonts from %SystemRoot%\\Fonts that are not in the
+    # registry
+
+    # Received all fonts from the registry.
+    for name, filename in regfonts:
+        fonttype = os.path.splitext(filename)[1][1:].lower()
+        if name.endswith("(TrueType)"):
+            name = name[:-10].strip()
+        if name.endswith("(All Res)"):
+            name = name[:-9].strip()
+        style = STYLE_NORMAL
+        if name.find(" Bold") >= 0:
+            style |= STYLE_BOLD
+        if name.find(" Italic") >= 0 or name.find(" Oblique") >= 0:
+            style |= STYLE_ITALIC
+
+        family = name
+        for rm in ("Bold", "Italic", "Oblique"):
+            family = family.replace(rm, "")
+        family = family.lower().strip()
+
+        fontpath = os.environ.get("SystemRoot", "C:\\Windows")
+        fontpath = os.path.join(fontpath, "Fonts")
+        if filename.find("\\") == -1:
+            # No path delimiter is given; we assume it to be a font in
+            # %SystemRoot%\Fonts
+            filename = os.path.join(fontpath, filename)
+        _add_font(family, name, style, fonttype, filename)
+
+
+def _cache_fonts_darwin():
+    """Caches fonts on Mac OS."""
+    raise NotImplementedError("Mac OS X support is not given yet")
+
+
+def _cache_fonts_fontconfig():
+    """Caches font on POSIX-alike platforms."""
+    try:
+        command = "fc-list : file family style fullname fullnamelang"
+        proc = Popen(command, stdout=PIPE, shell=True, stderr=PIPE)
+        pout = proc.communicate()[0]
+        output = pout.decode("utf-8")
+    except OSError:
+        return
+
+    for entry in output.split(os.linesep):
+        if entry.strip() == "":
+            continue
+        values = entry.split(":")
+        filename = values[0]
+
+        # get the font type
+        fname, fonttype = os.path.splitext(filename)
+        if fonttype == ".gz":
+            fonttype = os.path.splitext(fname)[1][1:].lower()
+        else:
+            fonttype = fonttype.lstrip(".").lower()
+
+        # get the font name
+        name = None
+        if len(values) > 3:
+            fullnames, fullnamelangs = values[3:]
+            langs = fullnamelangs.split(",")
+            try:
+                offset = langs.index("fullnamelang=en")
+            except ValueError:
+                offset = -1
+            if offset == -1:
+                try:
+                    offset = langs.index("en")
+                except ValueError:
+                    offset = -1
+            if offset != -1:
+                # got an english name, use that one
+                name = fullnames.split(",")[offset]
+                if name.startswith("fullname="):
+                    name = name[9:]
+        if name is None:
+            if fname.endswith(".pcf") or fname.endswith(".bdf"):
+                name = os.path.basename(fname[:-4])
+            else:
+                name = os.path.basename(fname)
+        name = name.lower()
+
+        # family and styles
+        family = values[1].strip().lower()
+        stylevals = values[2].strip()
+        style = STYLE_NONE
+
+        if stylevals.find("Bold") >= 0:
+            style |= STYLE_BOLD
+        if stylevals.find("Light") >= 0:
+            style |= STYLE_LIGHT
+        if stylevals.find("Italic") >= 0 or stylevals.find("Oblique") >= 0:
+            style |= STYLE_ITALIC
+        if stylevals.find("Medium") >= 0:
+            style |= STYLE_MEDIUM
+        if style == STYLE_NONE:
+            style = STYLE_NORMAL
+        _add_font(family, name, style, fonttype, filename)
+
+
+def init():
+    """Initialises the internal font cache.
+
+    It does not need to be called explicitly.
+    """
+    global __FONTCACHE
+    if __FONTCACHE is not None:
+        return
+    __FONTCACHE = {}
+    if sys.platform in ("win32", "cli"):
+        _cache_fonts_win32()
+    elif sys.platform == "darwin":
+        _cache_fonts_darwin()
+    else:
+        _cache_fonts_fontconfig()
+
+
+def list_fonts():
+    """Returns an iterator over the cached fonts."""
+    if __FONTCACHE is None:
+        init()
+    if len(__FONTCACHE) == 0:
+        yield None
+    for family, entries in __FONTCACHE.items():
+        for fname, styles, fonttype, filename in entries:
+            yield (family, fname, styles, fonttype, filename)
+
+
+def get_fonts(name, style=STYLE_NONE, ftype=None):
+    """Retrieves all fonts matching the given family or font name."""
+    if __FONTCACHE is None:
+        init()
+    if len(__FONTCACHE) == 0:
+        return None
+
+    results = []
+    rappend = results.append
+
+    name = name.lower()
+    if ftype:
+        ftype = ftype.lower()
+
+    fonts = __FONTCACHE.get(name, [])
+    for fname, fstyles, fonttype, filename in fonts:
+        if ftype and fonttype != ftype:
+            # ignore font filetype mismatches
+            continue
+        if style == STYLE_NONE or fstyles == style:
+            rappend((name, fname, fstyles, fonttype, filename))
+
+    for family, fonts in __FONTCACHE.items():
+        for fname, fstyles, fonttype, filename in fonts:
+            if fname.lower() == name and filename not in results:
+                rappend((family, fname, fstyles, fonttype, filename))
+    return results
+
+
+def get_font(name, style=STYLE_NONE, ftype=None):
+    """Retrieves the best matching font file for the given name and
+    criteria.
+    """
+    retvals = get_fonts(name, style, ftype)
+    if len(retvals) > 0:
+        return retvals[0]
+    return None