* ext/readline/extconf.rb: checked rl_line_buffer and rl_point in

readline.

* ext/readline/readline.c (readline_s_get_line_buffer): new method.
  (readline_s_get_point): new method.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24019 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Fri Jul 10 21:00:05 2009  TAKAO Kouji  <kouji@takao7.net>
+
+	* ext/readline/extconf.rb: checked rl_line_buffer and rl_point in
+	  readline.
+
+	* ext/readline/readline.c (readline_s_get_line_buffer): new method.
+	  (readline_s_get_point): new method.
+
 Fri Jul 10 16:30:03 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* array.c (recursive_join): use obj to tell if recursion occurs.

ext/readline/README.ja

@@ -167,16 +167,31 @@ Readline.completion_case_fold -> bool
   ユーザの入力を補完する際、大文字と小文字を区別する／しないを取得します。
   bool が真ならば区別しません。bool が偽ならば区別します。
 
- なお、Readline.completion_case_fold= メソッドで指定したオブジェクトを
- そのまま取得するので、次のような動作をします。
+  なお、Readline.completion_case_fold= メソッドで指定したオブジェクトを
+  そのまま取得するので、次のような動作をします。
 
-   require "readline"
-   
-   Readline.completion_case_fold = "This is a String."
-   p Readline.completion_case_fold # => "This is a String."
+    require "readline"
+    
+    Readline.completion_case_fold = "This is a String."
+    p Readline.completion_case_fold # => "This is a String."
 
   $SAFE が 4 の場合、例外 SecurityError が発生します。
 
+Readline.line_buffer -> string
+
+  入力中の行全体を返します。complete_proc の中で使用することを想定し
+  ています。Readline.line_buffer の長さは GNU Readline の rl_end 変数の
+  値と一致します。
+
+Readline.point -> int
+
+  現在のカーソルの位置を返します。
+  Readline モジュールは補完対象の単語の開始位置の情報を提供していません。
+  しかしながら、 completion_proc の中で入力した単語 text と
+  Readline.point を使用することで開始位置を導くことができます。
+
+    開始位置 = 入力した単語の長さ - Readline.point
+
 Readline.vi_editing_mode -> nil
 
   編集モードを vi モードにします。

ext/readline/extconf.rb

@@ -60,6 +60,8 @@ have_readline_var("rl_filename_quote_characters")
 have_readline_var("rl_attempted_completion_over")
 have_readline_var("rl_library_version")
 have_readline_var("rl_editing_mode")
+have_readline_var("rl_line_buffer")
+have_readline_var("rl_point")
 # workaround for native windows.
 /mswin|bccwin|mingw/ !~ RUBY_PLATFORM && have_readline_var("rl_event_hook")
 have_readline_func("rl_cleanup_after_signal")

ext/readline/readline.c

@@ -398,6 +398,54 @@ readline_s_get_completion_case_fold(VALUE self)
     return rb_attr_get(mReadline, completion_case_fold);
 }
 
+#ifdef HAVE_RL_LINE_BUFFER
+/*
+ * call-seq:
+ *   Readline.line_buffer -> string
+ *
+ * Returns the full line that is being edited. This is useful from
+ * within the complete_proc for determining the context of the
+ * completion request.
+ *
+ * The length of +Readline.line_buffer+ and GNU Readline's rl_end are
+ * same.
+ */
+static VALUE
+readline_s_get_line_buffer(VALUE self)
+{
+    rb_secure(4);
+    if (rl_line_buffer == NULL)
+	return Qnil;
+    return rb_tainted_str_new2(rl_line_buffer);
+}
+#else
+#define readline_s_get_line_buffer rb_f_notimplement
+#endif
+
+#ifdef HAVE_RL_POINT
+/*
+ * call-seq:
+ *   Readline.point -> int
+ *
+ * Returns the index of the current cursor position in
+ * +Readline.line_buffer+.
+ *
+ * The index in +Readline.line_buffer+ which matches the start of
+ * input-string passed to completion_proc is computed by subtracting
+ * the length of input-string from +Readline.point+.
+ *
+ *   start = (the length of input-string) - Readline.point
+ */
+static VALUE
+readline_s_get_point(VALUE self)
+{
+    rb_secure(4);
+    return INT2NUM(rl_point);
+}
+#else
+#define readline_s_get_point rb_f_notimplement
+#endif
+
 static char **
 readline_attempted_completion_function(const char *text, int start, int end)
 {
@@ -1262,6 +1310,10 @@ Init_readline()
 			       readline_s_set_completion_case_fold, 1);
     rb_define_singleton_method(mReadline, "completion_case_fold",
 			       readline_s_get_completion_case_fold, 0);
+    rb_define_singleton_method(mReadline, "line_buffer",
+			       readline_s_get_line_buffer, 0);
+    rb_define_singleton_method(mReadline, "point",
+			       readline_s_get_point, 0);
     rb_define_singleton_method(mReadline, "set_screen_size",
 			       readline_s_set_screen_size, 2);
     rb_define_singleton_method(mReadline, "get_screen_size",

test/readline/test_readline.rb

@@ -3,6 +3,8 @@ begin
 =begin
   class << Readline
     [
+     "line_buffer",
+     "point",
      "set_screen_size",
      "get_screen_size",
      "vi_editing_mode",
@@ -63,6 +65,8 @@ class TestReadline < Test::Unit::TestCase
        ["completer_quote_characters"],
        ["filename_quote_characters=", "\\"],
        ["filename_quote_characters"],
+       ["line_buffer"],
+       ["point"],
        ["set_screen_size", 1, 1],
        ["get_screen_size"],
       ]
@@ -78,41 +82,83 @@ class TestReadline < Test::Unit::TestCase
     end
   end
 
-  def test_readline
-    stdin = Tempfile.new("test_readline_stdin")
-    stdout = Tempfile.new("test_readline_stdout")
-    begin
-      stdin.write("hello\n")
-      stdin.close
-      stdout.close
-      line = replace_stdio(stdin.path, stdout.path) {
-        Readline.readline("> ", true)
-      }
-      assert_equal("hello", line)
-      assert_equal(true, line.tainted?)
-      stdout.open
-      assert_equal("> ", stdout.read(2))
-      assert_equal(1, Readline::HISTORY.length)
-      assert_equal("hello", Readline::HISTORY[0])
-      assert_raise(SecurityError) do
-        Thread.start {
-          $SAFE = 1
-          replace_stdio(stdin.path, stdout.path) do
-            Readline.readline("> ".taint)
-          end
-        }.join
+  if !/EditLine/n.match(Readline::VERSION)
+    def test_readline
+      stdin = Tempfile.new("test_readline_stdin")
+      stdout = Tempfile.new("test_readline_stdout")
+      begin
+        stdin.write("hello\n")
+        stdin.close
+        stdout.close
+        line = replace_stdio(stdin.path, stdout.path) {
+          Readline.readline("> ", true)
+        }
+        assert_equal("hello", line)
+        assert_equal(true, line.tainted?)
+        stdout.open
+        assert_equal("> ", stdout.read(2))
+        assert_equal(1, Readline::HISTORY.length)
+        assert_equal("hello", Readline::HISTORY[0])
+        assert_raise(SecurityError) do
+          Thread.start {
+            $SAFE = 1
+            replace_stdio(stdin.path, stdout.path) do
+              Readline.readline("> ".taint)
+            end
+          }.join
+        end
+        assert_raise(SecurityError) do
+          Thread.start {
+            $SAFE = 4
+            replace_stdio(stdin.path, stdout.path) { Readline.readline("> ") }
+          }.join
+        end
+      ensure
+        stdin.close(true)
+        stdout.close(true)
       end
-      assert_raise(SecurityError) do
-        Thread.start {
-          $SAFE = 4
-          replace_stdio(stdin.path, stdout.path) { Readline.readline("> ") }
-        }.join
+    end 
+    
+    # line_buffer
+    # point
+    def test_line_buffer__point
+      begin
+        Readline.line_buffer
+        Readline.point
+      rescue NotImplementedError
+        return
+      end
+      
+      stdin = Tempfile.new("test_readline_stdin")
+      stdout = Tempfile.new("test_readline_stdout")
+      begin
+        actual_text = nil
+        actual_line_buffer = nil
+        actual_point = nil
+        Readline.completion_proc = proc { |text|
+          actual_text = text
+          actual_point = Readline.point
+          actual_buffer_line = Readline.line_buffer
+          stdin.write(" finish\n")
+          stdin.close
+          stdout.close
+          return ["complete"]
+        }
+        stdin.write("first second\t")
+        stdin.flush
+        line = replace_stdio(stdin.path, stdout.path) {
+          Readline.readline("> ", false)
+        }
+        assert_equal("first second", actual_line_buffer)
+        assert_equal(12, actual_point)
+        assert_equal("first complete finish", Readline.line_buffer)
+        assert_equal(21, Readline.point)
+      ensure
+        stdin.close(true)
+        stdout.close(true)
       end
-    ensure
-      stdin.close(true)
-      stdout.close(true)
     end
-  end if !/EditLine/n.match(Readline::VERSION)
+  end
 
   def test_input=
     assert_raise(TypeError) do