Refactor assets bundler and split Javascript files

vendor/github.com/tdewolff/minify/common.go

@@ -12,8 +12,8 @@ import (
 // Epsilon is the closest number to zero that is not considered to be zero.
 var Epsilon = 0.00001
 
-// ContentType minifies a given mediatype by removing all whitespace.
-func ContentType(b []byte) []byte {
+// Mediatype minifies a given mediatype by removing all whitespace.
+func Mediatype(b []byte) []byte {
 	j := 0
 	start := 0
 	inString := false
@@ -79,6 +79,107 @@ func DataURI(m *M, dataURI []byte) []byte {
 const MaxInt = int(^uint(0) >> 1)
 const MinInt = -MaxInt - 1
 
+// Decimal minifies a given byte slice containing a number (see parse.Number) and removes superfluous characters.
+// It does not parse or output exponents.
+func Decimal(num []byte, prec int) []byte {
+	// omit first + and register mantissa start and end, whether it's negative and the exponent
+	neg := false
+	start := 0
+	dot := -1
+	end := len(num)
+	if 0 < end && (num[0] == '+' || num[0] == '-') {
+		if num[0] == '-' {
+			neg = true
+		}
+		start++
+	}
+	for i, c := range num[start:] {
+		if c == '.' {
+			dot = start + i
+			break
+		}
+	}
+	if dot == -1 {
+		dot = end
+	}
+
+	// trim leading zeros but leave at least one digit
+	for start < end-1 && num[start] == '0' {
+		start++
+	}
+	// trim trailing zeros
+	i := end - 1
+	for ; i > dot; i-- {
+		if num[i] != '0' {
+			end = i + 1
+			break
+		}
+	}
+	if i == dot {
+		end = dot
+		if start == end {
+			num[start] = '0'
+			return num[start : start+1]
+		}
+	} else if start == end-1 && num[start] == '0' {
+		return num[start:end]
+	}
+
+	// apply precision
+	if prec > -1 && dot+1+prec < end {
+		end = dot + 1 + prec
+		inc := num[end] >= '5'
+		if inc || num[end-1] == '0' {
+			for i := end - 1; i > start; i-- {
+				if i == dot {
+					end--
+				} else if inc {
+					if num[i] == '9' {
+						if i > dot {
+							end--
+						} else {
+							num[i] = '0'
+						}
+					} else {
+						num[i]++
+						inc = false
+						break
+					}
+				} else if i > dot && num[i] == '0' {
+					end--
+				}
+			}
+		}
+		if dot == start && end == start+1 {
+			if inc {
+				num[start] = '1'
+			} else {
+				num[start] = '0'
+			}
+		} else {
+			if dot+1 == end {
+				end--
+			}
+			if inc {
+				if num[start] == '9' {
+					num[start] = '0'
+					copy(num[start+1:], num[start:end])
+					end++
+					num[start] = '1'
+				} else {
+					num[start]++
+				}
+			}
+		}
+	}
+
+	if neg {
+		start--
+		num[start] = '-'
+	}
+	return num[start:end]
+}
+
 // Number minifies a given byte slice containing a number (see parse.Number) and removes superfluous characters.
 func Number(num []byte, prec int) []byte {
 	// omit first + and register mantissa start and end, whether it's negative and the exponent
@@ -311,24 +412,46 @@ func Number(num []byte, prec int) []byte {
 		}
 	} else {
 		// case 3
-		if dot < end {
-			if dot == start {
-				copy(num[start:], num[end-n:end])
-				end = start + n
-			} else {
-				copy(num[dot:], num[dot+1:end])
-				end--
+
+		// find new end, considering moving numbers to the front, removing the dot and increasing the length of the exponent
+		newEnd := end
+		if dot == start {
+			newEnd = start + n
+		} else {
+			newEnd--
+		}
+		newEnd += 2 + lenIntExp
+
+		exp := intExp
+		lenExp := lenIntExp
+		if newEnd < len(num) {
+			// it saves space to convert the decimal to an integer and decrease the exponent
+			if dot < end {
+				if dot == start {
+					copy(num[start:], num[end-n:end])
+					end = start + n
+				} else {
+					copy(num[dot:], num[dot+1:end])
+					end--
+				}
+			}
+		} else {
+			// it does not save space and will panic, so we revert to the original representation
+			exp = origExp
+			lenExp = 1
+			if origExp <= -10 || origExp >= 10 {
+				lenExp = strconv.LenInt(int64(origExp))
 			}
 		}
 		num[end] = 'e'
 		num[end+1] = '-'
 		end += 2
-		intExp = -intExp
-		for i := end + lenIntExp - 1; i >= end; i-- {
-			num[i] = byte(intExp%10) + '0'
-			intExp /= 10
+		exp = -exp
+		for i := end + lenExp - 1; i >= end; i-- {
+			num[i] = byte(exp%10) + '0'
+			exp /= 10
 		}
-		end += lenIntExp
+		end += lenExp
 	}
 
 	if neg {