add ' ' for whitespaces object

README.asciidoc

@@ -339,6 +339,7 @@ object you want.
  * _W_: select the whole WORD
  * _s_: select the sentence
  * _p_: select the paragraph
+ * _␣_: select the whitespaces
  * _i_: select the current indentation block
  * _n_: select the number
 

src/normal.cc

@@ -839,6 +839,7 @@ void select_object(Context& context, int param)
             { 'W', select_word<WORD> },
             { 's', select_sentence },
             { 'p', select_paragraph },
+            { ' ', select_whitespaces },
             { 'i', select_indent },
             { 'n', select_number },
         };
@@ -880,6 +881,7 @@ void select_object(Context& context, int param)
     "W:    WORD               \n"
     "s:    sentence           \n"
     "p:    paragraph          \n"
+    "␣:    whitespaces        \n"
     "i:    indent             \n");
 }
 

src/selectors.cc

@@ -377,6 +377,35 @@ static CharCount get_indent(const String& str, int tabstop)
     return indent;
 }
 
+Selection select_whitespaces(const Buffer& buffer, const Selection& selection, ObjectFlags flags)
+{
+    auto is_whitespace = [&](char c) {
+        return c == ' ' or c == '\t' or
+            (not (flags & ObjectFlags::Inner) and c == '\n');
+    };
+    BufferIterator first = buffer.iterator_at(selection.cursor());
+    BufferIterator last  = first;
+    if (flags & ObjectFlags::ToBegin)
+    {
+        if (is_whitespace(*first))
+        {
+            skip_while_reverse(first, buffer.begin(), is_whitespace);
+            if (not is_whitespace(*first))
+                ++first;
+        }
+    }
+    if (flags & ObjectFlags::ToEnd)
+    {
+        if (is_whitespace(*last))
+        {
+            skip_while(last, buffer.end(), is_whitespace);
+            --last;
+        }
+    }
+    return (flags & ObjectFlags::ToEnd) ? utf8_range(first, last)
+                                        : utf8_range(last, first);
+}
+
 static bool is_only_whitespaces(const String& str)
 {
     auto it = str.begin();

src/selectors.hh

@@ -212,6 +212,10 @@ Selection select_paragraph(const Buffer& buffer,
                            const Selection& selection,
                            ObjectFlags flags);
 
+Selection select_whitespaces(const Buffer& buffer,
+                             const Selection& selection,
+                             ObjectFlags flags);
+
 Selection select_indent(const Buffer& buffer,
                         const Selection& selection,
                         ObjectFlags flags);