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Contents
# frozen_string_literal: true
module GraphQL
module Language
module BlockString
# Remove leading and trailing whitespace from a block string.
# See "Block Strings" in https://github.com/facebook/graphql/blob/master/spec/Section%202%20--%20Language.md
def self.trim_whitespace(str)
lines = str.split("\n")
common_indent = nil
# find the common whitespace
lines.each_with_index do |line, idx|
if idx == 0
next
end
line_length = line.size
line_indent = line[/\A */].size
if line_indent < line_length && (common_indent.nil? || line_indent < common_indent)
common_indent = line_indent
end
end
# Remove the common whitespace
if common_indent
lines.each_with_index do |line, idx|
if idx == 0
next
else
line[0, common_indent] = ""
end
end
end
# Remove leading & trailing blank lines
while lines.first.empty?
lines.shift
end
while lines.last.empty?
lines.pop
end
# Rebuild the string
lines.join("\n")
end
end
end
end
Version data entries
26 entries across 26 versions & 1 rubygems