Change Rakefile, lib_src2md.rb and lib_src_file.rb.

Rakefile

@@ -12,12 +12,8 @@ end
 secfiles = Sec_files.new secfiles
 secfiles.renum!
 
-def basename srcfile
-  File.basename(srcfile, ".src.md")
-end
-
 abstract = Src_file.new "src/abstract.src.md"
- 
+
 otherfiles = ["src/turtle/turtle_doc.src.md",
               "src/tfetextview/tfetextview_doc.src.md",
               "src/Readme_for_developers.src.md"].map {|file| Src_file.new file}
@@ -32,27 +28,12 @@ file_table = srcfiles.map do |srcfile|
   ]
 end
 
-# Paths are relative from the directory "src".
-file_table_src = srcfiles.map do |srcfile|
-  [
-    srcfile.sub(/^src\//, ""),
-    "../gfm/" + srcfile.to_md,
-    "../html/" + srcfile.to_html,
-    "../latex/" + srcfile.to_tex
-  ]
-end
-
-othermdfiles = otherfiles.map {|file| "gfm/" + file.to_md}
-otherhtmlfiles = otherfiles.map {|file| "html/" + file.to_html}
-othertexfiles = otherfiles.map {|file| "latex/" + file.to_tex}
-
 mdfiles = srcfiles.map {|file| "gfm/" + file.to_md}
 htmlfiles = srcfiles.map {|file| "html/" + file.to_html}
 sectexfiles = secfiles.map {|file| "latex/" + file.to_tex}
 othertexfiles = otherfiles.map {|file| "latex/" + file.to_tex}
 texfiles = srcfiles.map {|file| "latex/" + file.to_tex}
 
-
 ["gfm", "html", "latex"].each do |d|
   if ! Dir.exist?(d)
     Dir.mkdir(d)
@@ -71,7 +52,7 @@ task md: %w[Readme.md] + mdfiles
 
 file "Readme.md" => [abstract] + secfiles do
   buf = [ "# Gtk4 Tutorial for beginners\n", "\n" ]
-  src2md abstract, abstract.to_md, file_table_src, "gfm"
+  src2md abstract, abstract.to_md, file_table, "gfm"
   buf += File.readlines(abstract.to_md)
   File.delete(abstract.to_md)
   buf.append("\n", "## Table of contents\n", "\n")
@@ -84,8 +65,8 @@ file "Readme.md" => [abstract] + secfiles do
 end
 
 file_table.each do |tbl|
-  file tbl[1] => tbl[0] do
-    src2md tbl[0], tbl[1], file_table_src, "gfm"
+  file tbl[1] => [tbl[0]] + tbl[0].c_files do
+    src2md tbl[0], tbl[1], file_table, "gfm"
     if tbl[0].instance_of? Sec_file
       i = tbl[0].num.to_i - 1
       if secfiles.size == 1
@@ -110,7 +91,7 @@ task html: ["html/index.html"] + htmlfiles
 file "html/index.html" => [abstract] + secfiles do
   buf = [ "# Gtk4 Tutorial for beginners\n", "\n" ]
   abstract_md = "html/#{abstract.to_md}"
-  src2md abstract, abstract_md, file_table_src, "html"
+  src2md abstract, abstract_md, file_table, "html"
   buf += File.readlines(abstract_md)
   File.delete(abstract_md)
   buf.append("\n", "## Table of contents\n", "\n")
@@ -126,9 +107,9 @@ file "html/index.html" => [abstract] + secfiles do
 end
 
 file_table.each do |tbl|
-  file tbl[2] => tbl[0] do
+  file tbl[2] => [tbl[0]] + tbl[0].c_files do
     html_md = "html/" + tbl[0].to_md
-    src2md tbl[0], html_md, file_table_src, "html"
+    src2md tbl[0], html_md, file_table, "html"
     if tbl[0].instance_of? Sec_file
       i = tbl[0].num.to_i - 1 # 0 based index
       if secfiles.size == 1
@@ -166,15 +147,15 @@ end
 abstract_tex = "latex/"+abstract.to_tex
 file abstract_tex => abstract do
   abstract_md = "latex/"+abstract.to_md
-  src2md abstract, abstract_md, file_table_src, "latex"
+  src2md abstract, abstract_md, file_table, "latex"
   sh "pandoc --listings -o #{abstract_tex} #{abstract_md}"
   File.delete(abstract_md)
 end
 
 file_table.each do |tbl|
-  file tbl[3] => tbl[0] do
+  file tbl[3] => [tbl[0]] + tbl[0].c_files do
     tex_md = "latex/" + tbl[0].to_md
-    src2md tbl[0], tex_md, file_table_src, "latex"
+    src2md tbl[0], tex_md, file_table, "latex"
     sh "pandoc --listings -o #{tbl[3]} #{tex_md}"
     File.delete(tex_md)
   end

gfm/Readme_for_developers.md

@@ -5,13 +5,13 @@
 1. You need linux operationg system, ruby, rake, pandoc and latex system.
 2. download this repository and uncompress the files.
 3. change your current directory to the top directory of the source files.
-4. type `rake html` to create html files. The files are generated under `html` directory.
-5. type `rake pdf` to create pdf file. The file is generated under `latex` directory.
+4. type `rake html` to create html files. The files are created under `html` directory.
+5. type `rake pdf` to create pdf file. The file is created under `latex` directory.
 
 ## Prerequisites
 
 - Linux operationg system.
-The programs in the repository has been tested on Ubuntu 2.04.
+The programs in the repository has been tested on Ubuntu 21.04.
 - Download the files in this repository.
 There are two ways to download.
   1. Use git.
@@ -225,7 +225,7 @@ For example,
     @@@if gfm
     Refer to  [tfetextview API reference](tfetextview_doc.md)
     @@@elif html
-    Refer to  [tfetextview API reference](../src/tfetextview/tfetextview_doc.src.html)
+    Refer to  [tfetextview API reference](tfetextview_doc.html)
     @@@elif latex
     Refer to tfetextview API reference in appendix.
     @@@end
@@ -298,6 +298,12 @@ The task of the script seems easy, but the program is not so simple.
 The script `mktbl.rb` uses a library `lib/lib_mktbl.rb`
 This script is independent from `src2md.rb`.
 
+@@@commands are effective in the whole text.
+This means you can't stop the @@@commands.
+But sometimes you want to show the commands literally like this document.
+One solution is to add four blanks at the top of the line.
+Then @@@commands are not effective because @@@commands must be at the top of the line.
+
 ## Directory structure
 
 There are six directories under `gtk4_tutorial` directory.
@@ -391,10 +397,10 @@ So the size is removed in the conversion.
 
 If a .src.md file has relative URL link, it will be changed by conversion.
 Because .src.md files are located under `src` directory and GFM files are located under `gfm` directory, base URL of GFM files is different from base URL of .src.md files.
-For example, `[src/sample.c](../src/sample.c)` is translated to `[src/sample.c](../src/sample.c)`.
+For example, `[src/sample.c](sample.c)` is translated to `[src/sample.c](../src/sample.c)`.
 
 If a link points another .src.md file, then the target filename will be changed to .md file.
-For example, `[Section 5](sec5.md)` is translated to `[Section 5](../src/sec5.md)`.
+For example, `[Section 5](sec5.md)` is translated to `[Section 5](sec5.md)`.
 
 If you want to clean the directory, that means remove all the generated markdown files, type `rake clean`.
 

gfm/sec11.md

@@ -6,7 +6,7 @@ A new version of the text file editor (`tfe`) will be made in this section and t
 It is `tfe5`.
 There are many changes from the prior version.
 All the sources are listed in [Section 16](sec16.md).
-They are located in two directories, [src/tfe5](../src/tfe5) and [src/tfetextview](../src/tfetextview).
+They are located in two directories, [src/tfe5](tfe5) and [src/tfetextview](tfetextview).
 
 ## Encapsulation
 

gfm/sec13.md

@@ -442,11 +442,11 @@ See [Gio reference manual](https://developer.gnome.org/gio/stable/GFile.html#g-f
 
 ## The API document and source file of tfetextview.c
 
-Refer [API document of TfeTextView](tfetextview_doc.md).
+Refer [API document of TfeTextView](../gfm/tfetextview_doc.md).
 It is under the directory `src/tfetextview`.
 
 All the source files are listed in [Section 16](sec16.md).
-You can find them under [src/tfe5](../src/tfe5) and [src/tfetextview](../src/tfetextview) directories.
+You can find them under [src/tfe5](tfe5) and [src/tfetextview](tfetextview) directories.
 
 
 Up: [Readme.md](../Readme.md),  Prev: [Section 12](sec12.md), Next: [Section 14](sec14.md)

gfm/sec15.md

@@ -319,6 +319,6 @@ If you use git, run the terminal and type the following.
 
     $ git clone https://github.com/ToshioCP/Gtk4-tutorial.git
 
-The source files are under [`/src/tfe5`](../src/tfe5) directory.
+The source files are under [`/src/tfe5`](tfe5) directory.
 
 Up: [Readme.md](../Readme.md),  Prev: [Section 14](sec14.md), Next: [Section 16](sec16.md)

gfm/sec18.md

@@ -336,19 +336,21 @@ The code is as follows.
  90   gtk_window_present (GTK_WINDOW (win));
  91 }
  92 
- 93 int
- 94 main (int argc, char **argv) {
- 95   GtkApplication *app;
- 96   int stat;
- 97 
- 98   app = gtk_application_new ("com.github.ToshioCP.menu2", G_APPLICATION_FLAGS_NONE);
- 99   g_signal_connect (app, "activate", G_CALLBACK (app_activate), NULL);
-100 
-101   stat =g_application_run (G_APPLICATION (app), argc, argv);
-102   g_object_unref (app);
-103   return stat;
-104 }
-105 
+ 93 #define APPLICATION_ID "com.github.ToshioCP.menu2"
+ 94 
+ 95 int
+ 96 main (int argc, char **argv) {
+ 97   GtkApplication *app;
+ 98   int stat;
+ 99 
+100   app = gtk_application_new (APPLICATION_ID, G_APPLICATION_FLAGS_NONE);
+101   g_signal_connect (app, "activate", G_CALLBACK (app_activate), NULL);
+102 
+103   stat =g_application_run (G_APPLICATION (app), argc, argv);
+104   g_object_unref (app);
+105   return stat;
+106 }
+107 
 ~~~
 
 - 5-26: Signal handlers.

gfm/sec20.md

@@ -1231,7 +1231,7 @@ The following is `meson.build`.
 16 
 ~~~
 
-Source files of `tfe` is under [src/tfe6](../src/tfe6) directory.
+Source files of `tfe` is under [src/tfe6](tfe6) directory.
 Copy them to your temporary directory and try to compile and install.
 
 ~~~

gfm/sec21.md

@@ -842,7 +842,7 @@ $ ninja -C _build
 $ ninja -C _build install  # or 'sudo ninja -C _build install'
 ~~~
 
-Source files are in [src/tfe7](../src/tfe7) directory.
+Source files are in [src/tfe7](tfe7) directory.
 
 We made a very small text editor.
 You can add features to this editor.

gfm/sec22.md

@@ -116,7 +116,7 @@ To compile this, type the following.
 
     $ gcc `pkg-config --cflags cairo` cairo.c `pkg-config --libs cairo`
 
-![rectangle.png](../src/misc/rectangle.png)
+![rectangle.png](misc/rectangle.png)
 
 There are lots of documentations in [Cairo's website](https://www.cairographics.org/).
 If you aren't familiar with Cairo, it is strongly recommended to read the [tutorial](https://www.cairographics.org/tutorial/) in the website.

gfm/sec24.md

@@ -6,7 +6,7 @@ A program `turtle` is an example with the combination of TfeTextView and GtkDraw
 It is a very small interpreter but it provides a tool to draw fractal curves.
 The following diagram is a Koch curve, which is a famous example of fractal curves.
 
-![Koch curve](../src/turtle/image/turtle_koch.png)
+![Koch curve](turtle/image/turtle_koch.png)
 
 This program uses flex and bison.
 Flex is a lexical analyzer.
@@ -42,7 +42,7 @@ The side of the square is 100 pixels long.
 
 In the same way, you can draw other curves.
 The documentation above shows some fractal curves such as tree, snow and square-koch.
-The source code in turtle language is located at [src/turtle/example](../src/turtle/example) directory.
+The source code in turtle language is located at [src/turtle/example](turtle/example) directory.
 You can read these files into `turtle` editor by clicking on the `Open` button.
 
 ## Combination of TfeTextView and GtkDrawingArea objects
@@ -129,7 +129,7 @@ Its size is the same as the surface of the GtkDrawingArea instance.
 
 
 Other part of `turtleapplication.c` is almost same as the codes of `colorapplication.c` in the previous section.
-The codes of `turtleapplication.c` is in the [turtle directory](../src/turtle).
+The codes of `turtleapplication.c` is in the [turtle directory](turtle).
 
 ## What does the interpreter do?
 

gfm/sec25.md

@@ -199,7 +199,7 @@ GtkNoSelection is used, so user can't select any item.
 79 
 ~~~
 
-The file `list1.c` is located under the directory [src/misc](../src/misc).
+The file `list1.c` is located under the directory [src/misc](misc).
 Make a shell script below and save it to your bin directory.
 (If you've installed Gtk4 from the source to $HOME/local, then your bin directory is $Home/local/bin.
 Otherwise, $Home/bin is your private bin directory.)
@@ -268,7 +268,7 @@ Therefore, GtkListItem instance is used as the `this` object of the lookup tag w
 `this` object will be explained in [section 27](sec27.md).
 
 The C source code is as follows.
-Its name is `list2.c` and located under [src/misc](../src/misc) directory.
+Its name is `list2.c` and located under [src/misc](misc) directory.
 
 ~~~C
  1 #include <gtk/gtk.h>
@@ -427,7 +427,7 @@ Because it can be NULL when GListItem `item` is unbound.
 If its GFileInfo, then return the filename (copy of the filename).
 
 The whole program (`list3.c`) is as follows.
-The program is located in [src/misc](../src/misc) directory.
+The program is located in [src/misc](misc) directory.
 
 ~~~C
  1 #include <gtk/gtk.h>

gfm/sec26.md

@@ -482,7 +482,7 @@ Such functionality comes from desktop.
 
 ## Compilation and execution
 
-The source files are located in [src/list4](../src/list4) directory.
+The source files are located in [src/list4](list4) directory.
 To compile and execute list4, type as follows.
 
 ~~~
@@ -566,7 +566,7 @@ This method decreases the number of ui files.
 But, the new ui file is a bit complicated especially for the beginners.
 If you feel some difficulty, it is better for you to separate the ui file.
 
-A directory [src/list5](../src/list5) includes the ui file above.
+A directory [src/list5](list5) includes the ui file above.
 
 
 Up: [Readme.md](../Readme.md),  Prev: [Section 25](sec25.md), Next: [Section 27](sec27.md)

gfm/sec27.md

@@ -23,7 +23,7 @@ Evaluation is like a calculation.
 A value is got by evaluating the expression.
 
 First, I want to show you the C file of the example for GtkExpression.
-Its name is `exp.c` and located under [src/expression](../src/expression) directory.
+Its name is `exp.c` and located under [src/expression](expression) directory.
 You don't need to understand the details now, just look at it.
 It will be explained in the next subsection.
 
@@ -97,7 +97,7 @@ It will be explained in the next subsection.
  67   gtk_box_append (GTK_BOX (box), label3);
  68   gtk_box_append (GTK_BOX (box), entry);
  69   gtk_window_set_child (GTK_WINDOW (win1), box);
- 70
+ 70 
  71   /* Constant expression */
  72   expression = gtk_constant_expression_new (G_TYPE_INT,100);
  73   if (gtk_expression_evaluate (expression, NULL, &value)) {
@@ -637,7 +637,7 @@ It will be used in the next section to build GtkListItem in GtkColumnView, which
 
 ## Compilation and execution
 
-All the sources are in [src/expression](../src/expression) directory.
+All the sources are in [src/expression](expression) directory.
 Change your current directory to the directory and run meson and ninja.
 Then, execute the application.
 

gfm/sec28.md

@@ -490,7 +490,7 @@ These are almost same as the functions in section 25 and 26.
 
 ## Compilation and execution.
 
-All the source files are in [src/column](../src/column) directory.
+All the source files are in [src/column](column) directory.
 Change your current directory to the directory and type the following.
 
 ~~~

gfm/tfetextview_doc.md

@@ -3,23 +3,23 @@
 TfeTextView -- Child object of GtkTextView. It holds GFile which the contents of GtkTextBuffer correponds to.
 
 ## Functions
-- GFile *[tfe_text_view_get_file ()](../src/tfetextview/#tfe_text_view_get_file)
-- void [tfe_text_view_open ()](../src/tfetextview/#tfe_text_view_open)
-- void [tfe_text_view_save ()](../src/tfetextview/#tfe_text_view_save)
-- void [tfe_text_view_saveas ()](../src/tfetextview/#tfe_text_view_saveas)
-- GtkWidget *[tfe_text_view_new_with_file ()](../src/tfetextview/#tfe_text_view_new_with_file)
-- GtkWidget *[tfe_text_view_new ()](../src/tfetextview/#tfe_text_view_new)
+- GFile *[tfe_text_view_get_file ()](#tfe_text_view_get_file)
+- void [tfe_text_view_open ()](#tfe_text_view_open)
+- void [tfe_text_view_save ()](#tfe_text_view_save)
+- void [tfe_text_view_saveas ()](#tfe_text_view_saveas)
+- GtkWidget *[tfe_text_view_new_with_file ()](#tfe_text_view_new_with_file)
+- GtkWidget *[tfe_text_view_new ()](#tfe_text_view_new)
 
 ## Signals
 
-- void [change-file](../src/tfetextview/#change-file)
-- void [open-response](../src/tfetextview/#open-response)
+- void [change-file](#change-file)
+- void [open-response](#open-response)
 
 ## Types and Values
 
-- [TfeTextView](../src/tfetextview/#tfetextview-1)
-- [TfeTextViewClass](../src/tfetextview/#tfetextviewclass)
-- [TfeTextViewOpenResponseType](../src/tfetextview/#enum-tfetextviewopenresponsetype)
+- [TfeTextView](#tfetextview-1)
+- [TfeTextViewClass](#tfetextviewclass)
+- [TfeTextViewOpenResponseType](#enum-tfetextviewopenresponsetype)
 
 ## Object Hierarchy
 

gfm/turtle_doc.md

@@ -27,14 +27,14 @@ Type the following command then turtle shows the following window.
 $ turtle
 ~~~
 
-![Screenshot just after it's executed](../src/turtle/image/turtle1.png)
+![Screenshot just after it's executed](image/turtle1.png)
 
 The left half is a text editor and the right half is a surface.
 Surface is like a canvas to draw shapes.
 
 Write turtle language in the text editor and click on `run` button, then the program will be executed and it draws shapes on the surface.
 
-![Tree](../src/turtle/image/turtle_tree.png)
+![Tree](image/turtle_tree.png)
 
 If you add the following line in `turtle.h`, then codes to inform the status will also be compiled.
 However, the speed will be quite slow because of the output messages.
@@ -86,7 +86,7 @@ Therefore, `tr 90` means "Turn right by 90 degrees".
 If you click on the `run`button, then two line segments appears.
 One is vertical and the other is horizontal.
 
-![Two line segments on the surface](../src/turtle/image/turtle2.png)
+![Two line segments on the surface](image/turtle2.png)
 
 ## Background and foreground color
 
@@ -113,7 +113,7 @@ This command changes the pen color.
 The prior shapes on the surface aren't affected.
 After this command, the turtle draws lines with the new color.
 
-![Change the foreground color](../src/turtle/image/turtle3.png)
+![Change the foreground color](image/turtle3.png)
 
 ## Other simple commands
 
@@ -307,7 +307,7 @@ Recursive call can be applied to draw fractal curves.
 Fractal curves appear when a procedure is applied to it repeatedly.
 The procedure replaces a part of the curve with the contracted curve.
 
-![Tree](../src/turtle/image/turtle_tree.png)
+![Tree](image/turtle_tree.png)
 
 This shape is called tree.
 The basic pattern of this shape is a line segment.
@@ -321,9 +321,9 @@ This repeating is programmed by recursive call.
 Two more examples are shown here.
 They are Koch curve and Square Koch curve.
 
-![Koch curve](../src/turtle/image/turtle_koch.png)
+![Koch curve](image/turtle_koch.png)
 
-![Square Koch curve](../src/turtle/image/turtle_square_koch.png)
+![Square Koch curve](image/turtle_square_koch.png)
 
 ## Tokens and punctuations
 

lib/lib_src2md.rb

@@ -72,7 +72,8 @@ require 'pathname'
 # Bison, lex, markdown and meson aren't supported.
 
 # file_table contains paths of source, GFM, html and latex.
-# It is possible to get the relationship between source file and created GFM/html/latex file.
+# If the paths are relative, srcmd and md must be relative.
+# And their base directory must be the same.
 
 # type is "gfm", "html" or "latex".
 # Caller can specify the target type.
@@ -275,13 +276,13 @@ def change_rel_link line, org_dir, new_dir, file_table=nil, type="gfm"
     link = $2
     if file_table
       file_table.each do |tbl|
-        if tbl[0] == link
-          link = tbl[i]
+        if tbl[0] == "#{org_dir}/#{link}"
+          p_link = Pathname.new tbl[i]
+          link = p_link.relative_path_from(p_new_dir).to_s
           break
         end
       end
-    end
-    if ! (link =~ /^(http|\/)/)
+    elsif ! (link =~ /^(http|\/)/)
       p_link = Pathname.new "#{org_dir}/#{link}"
       link = p_link.relative_path_from(p_new_dir).to_s
     end

lib/lib_src_file.rb

@@ -1,6 +1,6 @@
 class Src_file <String
   def initialize path
-    unless path.instance_of?(String)
+    unless path.is_a?(String)
       raise  "Src_file class initialization error: The argument is not String type."
     end
     unless File.exist?(path)
@@ -13,6 +13,20 @@ class Src_file <String
     @dirname = File.dirname path
     super(path)
   end
+  def replace path
+    unless path.is_a?(String)
+      raise  "Replace error: The argument is not String type."
+    end
+    unless File.exist?(path)
+      raise  "Replace error: File #{path} is not exist."
+    end
+    unless path =~ /\.src\.md$/
+      raise  "Replace error: The argment \"#{path}\" doesn't have .src.md suffix."
+    end
+    super(path)
+    @name = File.basename path, ".src.md"
+    @dirname = File.dirname path
+  end
   def path
     self
   end
@@ -31,15 +45,6 @@ class Src_file <String
   def to_tex
     @name+".tex"
   end
-end  
-
-class Sec_file < Src_file
-  def initialize path
-    unless path =~ /sec\d+(\.\d+)?\.src\.md$/
-      raise  "Sec_file class initialization error: The argment \"#{path}\" doesn't have secXX.src.md form. XX is int or float."
-    end
-    super(path)
-  end
   def c_files
     buf = IO.readlines(self)
     files = []
@@ -57,8 +62,18 @@ class Sec_file < Src_file
         # lines out of @@@include command is thrown away.
       end
     end
+    raise "Syntax error: @@@include didn't end (no @@@ line)." if in_include
     files
   end
+end  
+
+class Sec_file < Src_file
+  def initialize path
+    unless path =~ /sec\d+(\.\d+)?\.src\.md$/
+      raise  "Sec_file class initialization error: The argment \"#{path}\" doesn't have secXX.src.md form. XX is int or float."
+    end
+    super(path)
+  end
   def num # the return value is String
     @name.match(/\d+(\.\d+)?/)[0]
   end
@@ -89,8 +104,6 @@ class Sec_file < Src_file
       if old != new
         File.rename old, new
         self.replace new
-        @name = File.basename new, ".src.md"
-        @dirname = File.dirname new
       end
     end
   end
@@ -136,7 +149,7 @@ private
     (self.size - 1).downto 0 do |i|
       if tbl[i][2] == false
         n = tbl[i][1] # number to substitute
-        found = self.find_index { |sec_file| sec_file != self && sec_file.to_f == n }
+        found = self.find_index { |sec_file| sec_file.to_f == n }
         unless found # OK to replace
           self[i].renum! n
           tbl[i][2] = true

src/Readme_for_developers.src.md

@@ -5,13 +5,13 @@
 1. You need linux operationg system, ruby, rake, pandoc and latex system.
 2. download this repository and uncompress the files.
 3. change your current directory to the top directory of the source files.
-4. type `rake html` to create html files. The files are generated under `html` directory.
-5. type `rake pdf` to create pdf file. The file is generated under `latex` directory.
+4. type `rake html` to create html files. The files are created under `html` directory.
+5. type `rake pdf` to create pdf file. The file is created under `latex` directory.
 
 ## Prerequisites
 
 - Linux operationg system.
-The programs in the repository has been tested on Ubuntu 2.04.
+The programs in the repository has been tested on Ubuntu 21.04.
 - Download the files in this repository.
 There are two ways to download.
   1. Use git.
@@ -223,9 +223,9 @@ This command is similar to "#if", "#elif", #else" and "#endif" directives in C p
 For example,
 
     @@@if gfm
-    Refer to  [tfetextview API reference](tfetextview/tfetextview_doc.src.md)
+    Refer to  [tfetextview API reference](tfetextview_doc.md)
     @@@elif html
-    Refer to  [tfetextview API reference](tfetextview/tfetextview_doc.src.html)
+    Refer to  [tfetextview API reference](tfetextview_doc.html)
     @@@elif latex
     Refer to tfetextview API reference in appendix.
     @@@end
@@ -298,6 +298,12 @@ The task of the script seems easy, but the program is not so simple.
 The script `mktbl.rb` uses a library `lib/lib_mktbl.rb`
 This script is independent from `src2md.rb`.
 
+@@@commands are effective in the whole text.
+This means you can't stop the @@@commands.
+But sometimes you want to show the commands literally like this document.
+One solution is to add four blanks at the top of the line.
+Then @@@commands are not effective because @@@commands must be at the top of the line.
+
 ## Directory structure
 
 There are six directories under `gtk4_tutorial` directory.

test/test_lib_src2md.rb

@@ -467,7 +467,7 @@ files.each do |f|
 end
 
 # --- test change_rel_link
-file_table = [["sec3.src.md", "../gfm/sec3.md", "../html/sec3.html", "../latex/sec3.html"]]
+file_table = [["src/sec3.src.md", "gfm/sec3.md", "html/sec3.html", "latex/sec3.html"]]
 # general relative link
 s = "[sample.c](temp/sample.c)"
 t = change_rel_link s, "test", "gfm"
@@ -498,27 +498,23 @@ dst_dirs.each do |d|
   src2md "temp/sample.src.md", "#{d}/sample.md"
   dst_md = File.read "#{d}/sample.md"
   if d == "gfm"
-    print "Gfm result didn't match !!\n" if dst_md != sample_md_gfm
+    print "Gfm result didn't match !!\n" unless dst_md == sample_md_gfm
 #File.write "tmp.txt", sample_md_gfm
 #system "diff", "#{d}/sample.md", "tmp.txt"
 #File.delete "tmp.txt"
   elsif d == "html"
-    if dst_md != sample_md_html
-      print "Html result didn't match !!\n"
+    print "Html result didn't match !!\n" unless dst_md == sample_md_html
 #File.write "tmp.txt", sample_md_html
 #system "diff", "#{d}/sample.md", "tmp.txt"
 #File.delete "tmp.txt"
-    end
   elsif d == "latex"
     sample_md_latex.gsub!(/\[((R|r)elative link)\]\([^)]+\)/, "\\1")
-    if dst_md != sample_md_latex
-      print "Latex result didn't match !!\n"
+    print "Latex result didn't match !!\n" unless dst_md == sample_md_latex
 #File.write "tmp.txt", sample_md_latex
 #system "diff", "#{d}/sample.md", "tmp.txt"
 #File.delete "tmp.txt"
-    end
   else
-   print "Unexpected error.\n"
+    print "Unexpected error.\n"
   end
 end