Use StyledStrings for Logging

Transition from printstyled to the new approach to styling provided by
StyledStrings.

This both makes it possible for the styling used to be customised, and
allows for other styled content to inherit/re-use the logging styles.

Author: tecosaur

doc/Manifest.toml

@@ -65,6 +65,7 @@ version = "1.11.0+1"
 uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 
 [[deps.Logging]]
+deps = ["StyledStrings"]
 uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
 
 [[deps.Markdown]]
@@ -94,7 +95,7 @@ deps = ["Unicode"]
 uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 
 [[deps.REPL]]
-deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
+deps = ["InteractiveUtils", "Markdown", "Sockets", "StyledStrings", "Unicode"]
 uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 
 [[deps.Random]]
@@ -111,6 +112,9 @@ uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 [[deps.Sockets]]
 uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
 
+[[deps.StyledStrings]]
+uuid = "f489334b-da3d-4c2e-b8f0-e476e12c162b"
+
 [[deps.Test]]
 deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
 uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"

stdlib/Logging/Project.toml

@@ -2,6 +2,9 @@ name = "Logging"
 uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
 version = "1.11.0"
 
+[deps]
+StyledStrings = "f489334b-da3d-4c2e-b8f0-e476e12c162b"
+
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 

stdlib/Logging/src/ConsoleLogger.jl

@@ -12,10 +12,10 @@ Log levels less than `min_level` are filtered out.
 Message formatting can be controlled by setting keyword arguments:
 
 * `meta_formatter` is a function which takes the log event metadata
-  `(level, _module, group, id, file, line)` and returns a color (as would be
-  passed to printstyled), prefix and suffix for the log message.  The
-  default is to prefix with the log level and a suffix containing the module,
-  file and line location.
+  `(level, _module, group, id, file, line)` and returns a face name (used in
+  the constructed [`AnnotatedString`](@ref Base.AnnotatedString)), prefix and
+  suffix for the log message.  The default is to prefix with the log level and
+  a suffix containing the module, file and line location.
 * `show_limited` limits the printing of large data structures to something
   which can fit on the screen by setting the `:limit` `IOContext` key during
   formatting.
@@ -58,10 +58,10 @@ end
 showvalue(io, ex::Exception) = showerror(io, ex)
 
 function default_logcolor(level::LogLevel)
-    level < Info  ? Base.debug_color() :
-    level < Warn  ? Base.info_color()  :
-    level < Error ? Base.warn_color()  :
-                    Base.error_color()
+    level < Info  ? :log_debug :
+    level < Warn  ? :log_info  :
+    level < Error ? :log_warn  :
+                    :log_error
 end
 
 function default_metafmt(level::LogLevel, _module, group, id, file, line)
@@ -103,6 +103,8 @@ function termlength(str)
     return N
 end
 
+termlength(str::Base.AnnotatedString) = textwidth(str)
+
 function handle_message(logger::ConsoleLogger, level::LogLevel, message, _module, group, id,
                         filepath, line; kwargs...)
     @nospecialize
@@ -145,6 +147,7 @@ function handle_message(logger::ConsoleLogger, level::LogLevel, message, _module
     # Format lines as text with appropriate indentation and with a box
     # decoration on the left.
     color, prefix, suffix = logger.meta_formatter(level, _module, group, id, filepath, line)::Tuple{Union{Symbol,Int},String,String}
+    color = Face(foreground=StyledStrings.Legacy.legacy_color(color))
     minsuffixpad = 2
     buf = IOBuffer()
     iob = IOContext(buf, stream)
@@ -158,19 +161,19 @@ function handle_message(logger::ConsoleLogger, level::LogLevel, message, _module
         nonpadwidth = 2 + length(suffix)
     end
     for (i, (indent, msg)) in enumerate(msglines)
-        boxstr = length(msglines) == 1 ? "[ " :
-                 i == 1                ? "┌ " :
-                 i < length(msglines)  ? "│ " :
-                                         "└ "
-        printstyled(iob, boxstr, bold=true, color=color)
+        boxstr = length(msglines) == 1 ? "[" :
+                 i == 1                ? "┌" :
+                 i < length(msglines)  ? "│" :
+                                         "└"
+        print(iob, styled"{$color,bold:$boxstr} ")
         if i == 1 && !isempty(prefix)
-            printstyled(iob, prefix, " ", bold=true, color=color)
+            print(iob, styled"{$color,bold:$prefix} ")
         end
         print(iob, " "^indent, msg)
         if i == length(msglines) && !isempty(suffix)
             npad = max(0, justify_width - nonpadwidth) + minsuffixpad
             print(iob, " "^npad)
-            printstyled(iob, suffix, color=:light_black)
+            print(iob, styled"{shadow:$suffix}")
         end
         println(iob)
     end

stdlib/Logging/src/Logging.jl

@@ -8,6 +8,8 @@ and available by default.
 """
 module Logging
 
+using StyledStrings
+
 # Import the CoreLogging implementation into Logging as new const bindings.
 # Doing it this way (rather than with import) makes these symbols accessible to
 # tab completion.