# frozen_string_literal: true
module SyntaxSuggest
module Capture
# Shows the context around code provided by "falling" indentation
#
# If this is the original code lines:
#
# class OH
# def hello
# it "foo" do
# end
# end
#
# And this is the line that is captured
#
# it "foo" do
#
# It will yield its surrounding context:
#
# class OH
# def hello
# end
# end
#
# Example:
#
# FallingIndentLines.new(
# block: block,
# code_lines: @code_lines
# ).call do |line|
# @lines_to_output << line
# end
#
class FallingIndentLines
def initialize(code_lines:, block:)
@lines = nil
@scanner = ScanHistory.new(code_lines: code_lines, block: block)
@original_indent = block.current_indent
end
def call(&yieldable)
last_indent_up = @original_indent
last_indent_down = @original_indent
@scanner.commit_if_changed
@scanner.scan(
up: ->(line, _, _) {
next true if line.empty?
if line.indent < last_indent_up
yieldable.call(line)
last_indent_up = line.indent
end
true
},
down: ->(line, _, _) {
next true if line.empty?
if line.indent < last_indent_down
yieldable.call(line)
last_indent_down = line.indent
end
true
}
)
@scanner.stash_changes
end
end
end
end
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