add string trim_prefix trim_suffix lstrip and rstrip methods

1 files changed, 52 insertions, 0 deletions

diff --git a/core/ustring.cpp b/core/ustring.cpp
index d749146998..913c98e91e 100644
--- a/core/ustring.cpp
+++ b/core/ustring.cpp
@@ -2997,6 +2997,40 @@ String String::strip_escapes() const {
 	return substr(beg, end - beg);
 }
 
+String String::lstrip(const Vector<CharType> &p_chars) const {
+
+	int len = length();
+	int beg;
+
+	for (beg = 0; beg < len; beg++) {
+
+		if (p_chars.find(operator[](beg)) == -1)
+			break;
+	}
+
+	if (beg == 0)
+		return *this;
+
+	return substr(beg, len - beg);
+}
+
+String String::rstrip(const Vector<CharType> &p_chars) const {
+
+	int len = length();
+	int end;
+
+	for (end = len - 1; end >= 0; end--) {
+
+		if (p_chars.find(operator[](end)) == -1)
+			break;
+	}
+
+	if (end == len - 1)
+		return *this;
+
+	return substr(0, end + 1);
+}
+
 String String::simplify_path() const {
 
 	String s = *this;
@@ -3448,6 +3482,24 @@ String String::pad_zeros(int p_digits) const {
 	return s;
 }
 
+String String::trim_prefix(const String &p_prefix) const {
+
+	String s = *this;
+	if (s.begins_with(p_prefix)) {
+		return s.substr(p_prefix.length(), s.length() - p_prefix.length());
+	}
+	return s;
+}
+
+String String::trim_suffix(const String &p_suffix) const {
+
+	String s = *this;
+	if (s.ends_with(p_suffix)) {
+		return s.substr(0, s.length() - p_suffix.length());
+	}
+	return s;
+}
+
 bool String::is_valid_integer() const {
 
 	int len = length();