Avoid logging all data being sent

README.md

@@ -48,16 +48,16 @@ Here we will show a very basic usage:
 using Gnuplot
 
 # Create some noisy data...
-x = collect(linspace(-2pi, 2pi, 100))
-y = 1.5 * sin.(0.3 + 0.7x) 
-noise = randn(length(x))./2
-e = 0.5 * ones(x)
+x = collect(linspace(-2pi, 2pi, 100));
+y = 1.5 * sin.(0.3 + 0.7x) ;
+noise = randn(length(x))./2;
+e = 0.5 * ones(x);
 
 # ...and show them using gnuplot.
 @gp("set key horizontal", "set grid",
     xrange=(-7,7), ylabel="Y label",
     x, y, "w l t 'Real model' dt 2 lw 2 lc rgb 'red'",
-    x, y+noise, e, "w errorbars t 'Data'")
+    x, y+noise, e, "w errorbars t 'Data'");
 ```
 That's it for the first plot, the syntax should be familiar to most
 gnuplot users.  With this code we:
@@ -75,6 +75,51 @@ since **Gnuplot.jl** aims to be mostly transparent: the user is
 supposed to focus only on the data and on the gnuplot commands, rather
 than the package details.
 
+Let's have a look to the REPL output of the above command (this may
+differ on your computer since we used random numbers):
+```Julia
+GP(nothing) Starting a new gnuplot process...
+GP(nothing) Found gnuplot version: 5.0.0
+GP(1) New session started with handle 1
+GP(1) -> reset session
+GP(1) -> set key horizontal
+GP(1) -> set grid
+GP(1) -> set xrange [-7:7]
+GP(1) -> set ylabel 'Y label'
+GP(1) -> $d1_1 << EOD
+GP(1) ->  -6.283185307179586 1.225887340796837
+GP(1) ->  -6.156252270670907 1.1443471266509504
+GP(1) ->  -6.029319234162229 1.05377837392046
+GP(1) ...
+GP(1) ->  6.029319234162229 -1.4724753107714488
+GP(1) ->  6.156252270670907 -1.4920483708151848
+GP(1) ->  6.283185307179586 -1.4998496389154883
+GP(1) -> EOD
+GP(1) -> $d1_2 << EOD
+GP(1) ->  -6.283185307179586 2.5763863845120527 0.5
+GP(1) ->  -6.156252270670907 1.1957471376063518 0.5
+GP(1) ->  -6.029319234162229 1.1841824882108178 0.5
+GP(1) ...
+GP(1) ->  6.029319234162229 -1.186685251966976 0.5
+GP(1) ->  6.156252270670907 -0.4268692113198256 0.5
+GP(1) ->  6.283185307179586 -1.4503668565815566 0.5
+GP(1) -> EOD
+GP(1) -> plot \
+GP(1) ->   $d1_1 w l t 'Real model' dt 2 lw 2 lc rgb 'red', \
+GP(1) ->   $d1_2 w errorbars t 'Data'
+GP(1) -> 
+```
+
+The **Gnuplot.jl** (note the leading `GP`...) package tells us that it
+is starting a new gnuplot process (version 5.0.0) and the number of
+the handle for the current session.  It also shows several lines
+starting with ` -> `, meaning "sent to gnuplot", with all the commands
+and almost all the data being sent.  The gnuplot replies are also
+printed, but they lack the ` -> ` string.  To change the amount of
+lines being printed you may set a different verbosity level (see
+documentation for `Gnuplot.setOption`) as an integer between 0 (no log
+at all) and 4 (lots of lines printed).  The default value is 2.
+
 Before proceeding we will brief discuss the four symbols exported
 by the package:
 - `@gp`: the *swiss army knife* of the package, it allows to send

src/Gnuplot.jl

@@ -258,7 +258,6 @@ println("Current terminal: ", gp.send("print GPVAL_TERM", capture=true))
 
     if capture
         write(p.pin, "print 'GNUPLOT_JL_SAVE_OUTPUT'\n")
-        p_.log(4, "-> Start capture", color=p_.main.colorIn)
     end
 
     for s in split(cmd, "\n")
@@ -269,7 +268,6 @@ println("Current terminal: ", gp.send("print GPVAL_TERM", capture=true))
 
     if capture
         write(p.pin, "print 'GNUPLOT_JL_SAVE_OUTPUT_END'\n")
-        p_.log(4, "-> End capture", color=p_.main.colorIn)
     end
     flush(p.pin)
 
@@ -442,14 +440,26 @@ function data(data::Vararg{AbstractArray{T,1},N};
     v = "$name << EOD"
     push!(cur.data, v)
     send(v)
+
+    origVerb = p_.main.verboseLev
     for i in 1:length(data[1])
         v = ""
         for j in 1:length(data)
             v *= " " * string(data[j][i])
         end
         push!(cur.data, v)
+
+        if i>3  &&  i<=(length(data[1])-3)  &&   p_.main.verboseLev < 4
+            p_.log(2, "...", color=p_.main.colorIn)            
+            p_.main.verboseLev = 0
+        else
+            p_.main.verboseLev = origVerb
+        end
+
         send(v)
     end
+    p_.main.verboseLev = origVerb
+
     v = "EOD"
     push!(cur.data, v)
     send(v)

src/GnuplotInternals.jl

@@ -89,7 +89,7 @@ mutable struct MainState
   handles::Vector{Int}           # handles of gnuplot sessions
   curPos::Int                    # index in the procs, states and handles array of current session
 
-  MainState() = new(:cyan, :yellow, 1,
+  MainState() = new(:cyan, :yellow, 2,
                     "", "", Vector{GnuplotProc}(), Vector{GnuplotSession}(), 
                     Vector{Int}(), 0)
 end
@@ -171,7 +171,7 @@ function readTask(sIN, channel; kw...)
 
         if line == "GNUPLOT_JL_SAVE_OUTPUT"
             saveOutput = true
-            log(4, "|start of captured data =========================")
+            log(4, "|begin of captured data =========================")
         else
             if saveOutput
                 put!(channel, line)

test/runtests.jl

@@ -8,7 +8,6 @@ function pressEnter()
 end
 
 function gp_test(terminal="unknown")
-    gp.setOption(verb=1)
     gp.setOption(startup="set term $terminal")
 
     gp.reset()