end
# Create a new sourcefile using a dummy filename and a given content
- init from_string(filename: String, string: String)
+ init from_string(filename: String, string: String) is
+ nosuper
do
self.filename = filename
self.string = string
line_starts[0] = 0
end
- # Position of each line start
+ # Offset of each line start in the content `string`.
+ #
+ # Used for fast access to each line when rendering parts of the `string`.
var line_starts = new Array[Int]
+
+ # Extract a given line excluding the line-terminators characters.
+ #
+ # `line_number` starts at 1 for the first line.
+ fun get_line(line_number: Int): String do
+ if line_number > line_starts.length then return ""
+ var line_start = line_starts[line_number-1]
+ var line_end = line_start
+ var string = self.string
+ while line_end+1 < string.length and string.chars[line_end+1] != '\n' and string.chars[line_end+1] != '\r' do
+ line_end += 1
+ end
+ return string.substring(line_start, line_end-line_start+1)
+ end
end
# A location inside a source file
# loc = new Location.from_string("location.nit:82--105,8")
# assert loc.to_s == "location.nit:82,0--105,8"
# ~~~
- init from_string(string: String) do
+ init from_string(string: String) is
+ nosuper
+ do
self.line_start = 0
self.line_end = 0
self.column_start = 0
end
end
+ # Initialize a location corresponding to an opaque file.
+ #
+ # The path is used as is and is not open nor read.
+ init opaque_file(path: String)
+ do
+ var source = new SourceFile.from_string(path, "")
+ init(source, 0, 0, 0, 0)
+ end
+
# The index in the start character in the source
fun pstart: Int do return file.line_starts[line_start-1] + column_start-1
# * `"0;32"` for green
fun colored_line(color: String): String
do
- var esc = 27.ascii
+ var esc = 27.code_point
var def = "{esc}[0m"
var col = "{esc}[{color}m"