Merge pull request #474 from AmitPr/master

Add ability to run functions on colors from templates

1 files changed, 41 insertions, 3 deletions

diff --git a/pywal/export.py b/pywal/export.py
index 88c98a6..d9ff16d 100644
--- a/pywal/export.py
+++ b/pywal/export.py
@@ -3,22 +3,60 @@ Export colors in various formats.
 """
 import logging
 import os
+import re
 
-from .settings import CACHE_DIR, MODULE_DIR, CONF_DIR
 from . import util
+from .settings import CACHE_DIR, CONF_DIR, MODULE_DIR
 
 
 def template(colors, input_file, output_file=None):
     """Read template file, substitute markers and
        save the file elsewhere."""
     template_data = util.read_file_raw(input_file)
-
+    for i, l in enumerate(template_data):
+        for match in re.finditer(r"(?<=(?<!\{))(\{([^{}]+)\})(?=(?!\}))", l):
+            # Get the color, and the functions associated with it
+            cname, _, funcs = match.group(2).partition(".")
+            # Check that functions are needed for this color
+            if len(funcs) == 0:
+                continue
+            # Build up a string which will be replaced with the new color
+            replace_str = cname
+            # Color to be modified copied into new one
+            new_color = util.Color(colors[cname].hex_color)
+            # Execute each function to be done
+            for func in filter(None, funcs.split(")")):
+                # Get function name and arguments
+                func = func.split("(")
+                fname = func[0]
+                if fname[0] == '.':
+                    fname = fname[1:]
+                if not hasattr(new_color, fname):
+                    logging.error(
+                        "Syntax error in template file '%s' on line '%s'",
+                        input_file, i)
+                function = getattr(new_color, fname)
+
+                # If the function is callable, call it
+                if callable(function):
+                    if len(func) > 1:
+                        new_color = function(*func[1].split(","))
+                    else:
+                        new_color = function()
+                    # string to replace generated colors
+                    if func[0] != '.':
+                        replace_str += "."
+                    replace_str += "(".join(func) + ")"
+            # If the color was changed, replace with a unique identifier.
+            if new_color is not colors[cname]:
+                template_data[i] = l.replace(
+                    replace_str, "color" + new_color.strip)
+                colors["color" + new_color.strip] = new_color
     try:
         template_data = "".join(template_data).format(**colors)
     except ValueError:
         logging.error("Syntax error in template file '%s'.", input_file)
         return
-
     util.save_file(template_data, output_file)