# See the License for the specific language governing permissions and
# limitations under the License.
-# This module is used to model Nit source-file and locations in source-file
+# Nit source-file and locations in source-file
module location
# A raw text Nit source file
var string: String is noinit
# The original stream used to initialize `string`
- var stream: IStream
+ var stream: Reader
init
do
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
super Comparable
redef type OTHER: Location
+ # The associated source-file
var file: nullable SourceFile
+
+ # The starting line number (starting from 1)
+ #
+ # If `line_start==0` then the whole file is considered
var line_start: Int
+
+ # The stopping line number (starting from 1)
var line_end: Int
# Start of this location on `line_start`
# Require: `column_start >= 0`
var column_start: Int
+ # End of this location on `line_end`
var column_end: Int
+ # Builds a location instance from its string representation.
+ #
+ # Examples:
+ #
+ # ~~~
+ # var loc = new Location.from_string("location.nit:82,2--105,8")
+ # assert loc.to_s == "location.nit:82,2--105,8"
+ #
+ # loc = new Location.from_string("location.nit")
+ # assert loc.to_s == "location.nit"
+ #
+ # loc = new Location.from_string("location.nit:82,2")
+ # assert loc.to_s == "location.nit:82,2--0,0"
+ #
+ # loc = new Location.from_string("location.nit:82--105")
+ # assert loc.to_s == "location.nit:82,0--105,0"
+ #
+ # loc = new Location.from_string("location.nit:82,2--105")
+ # assert loc.to_s == "location.nit:82,2--105,0"
+ #
+ # 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) is
+ nosuper
+ do
+ self.line_start = 0
+ self.line_end = 0
+ self.column_start = 0
+ self.column_end = 0
+ # parses the location string and init position vars
+ var parts = string.split_with(":")
+ var filename = parts.shift
+ self.file = new SourceFile(filename, new FileReader.open(filename))
+ # split position
+ if parts.is_empty then return
+ var pos = parts.first.split_with("--")
+ # split start position
+ if pos.first.has(",") then
+ var pos1 = pos.first.split_with(",")
+ self.line_start = pos1[0].to_i
+ if pos1.length > 1 then
+ self.column_start = pos1[1].to_i
+ end
+ else
+ self.line_start = pos.first.to_i
+ end
+ # split end position
+ if pos.length <= 1 then return
+ if pos[1].has(",") then
+ var pos2 = pos[1].split_with(",")
+ if pos2.length > 1 then
+ self.line_end = pos2[0].to_i
+ self.column_end = pos2[1].to_i
+ else
+ self.line_end = self.line_start
+ self.column_end = pos2[0].to_i
+ end
+ else
+ self.line_end = pos[1].to_i
+ 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
private var text_cache: nullable String = null
- init with_file(f: SourceFile) do init(f,0,0,0,0)
-
redef fun ==(other: nullable Object): Bool do
if other == null then return false
if not other isa Location then return false
if line_start == loc.line_start then
if column_start < loc.column_start then return false
- if column_start > loc.column_end then return false
+ if line_start == loc.line_end and column_start > loc.column_end then return false
end
if line_end == loc.line_end and column_end > loc.column_end then return false
var file_part = ""
if file != null then
file_part = file.filename
- if file.filename.length > 0 then file_part += ":"
end
+ if line_start <= 0 then return file_part
+
+ if file != null and file.filename.length > 0 then file_part += ":"
+
if line_start == line_end then
if column_start == column_end then
return "{file_part}{line_start},{column_start}"
# * `"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"
var l = self
var i = l.line_start
+ if i <= 0 then return ""
+
var line_start = l.file.line_starts[i-1]
var line_end = line_start
var string = l.file.string
nitlanguage / nit.git / blobdiff