Rename from .txt to .js, as they're all JavaScript

[cssbattle.git] / unit_replacement.js

diff --git a/unit_replacement.js b/unit_replacement.js
new file mode 100644 (file)
index 0000000..2f83635
--- /dev/null
+++ b/unit_replacement.js
@@ -0,0 +1,51 @@
+// 1ch -> 8px
+// 1pc -> 12pt -> 1/6in -> 16px
+// 1vw -> 4px
+// 1vh -> 3px
+// 1in -> 96px
+// 1ex -> 7.16px (useful, right?!)
+// 1em -> 16px - we'll just use pc for this instead
+// 1q -> 100/106 px <-- this is a bad bad number, so, if we've already got q, we probably won't do anything with 'em'
+
+pixel_lengths = {
+  "ch": 8,
+  "pc": 16,
+  "vw":4,
+  "vh":3,
+  "in": 96,
+  "ex":7.16,
+  "em":16,
+  "px":1
+};
+
+function getShortestUnit(length,unit) {
+  cur_string = `${length}${unit}`;
+  pixel_length = 0;
+    if (pixel_lengths.hasOwnProperty(unit)) {
+      pixel_length = length * pixel_lengths[unit];
+    }
+    else {
+      return cur_string;
+    }
+    for (unit in pixel_lengths) {
+      if (pixel_lengths.hasOwnProperty(unit)) {
+        new_len = pixel_length / pixel_lengths[unit];
+        new_string = `${new_len}${unit}`;
+        if (new_string.length < cur_string.length) {
+          cur_string = new_string;
+        }
+      }
+    }
+  return cur_string;
+}
+
+// REQUIRED: A `run` function thats takes in current code and returns processed code.
+function run(code) {
+  // `code` is your current code in the editor
+  var processedCode = code.replace(/(\d+)(vw|vh|pc|px|in|ex|em)/g, (match, $1,$2) => {
+   return getShortestUnit($1,$2);
+  });
+                                   
+  // Return the final code
+  return processedCode;
+}
\ No newline at end of file