add paragraph (p) object

README.asciidoc

@@ -210,6 +210,7 @@ object you want.
  * _w_: select the whole word
  * _W_: select the whole WORD
  * _s_: select the sentence
+ * _p_: select the paragraph
 
 Registers
 ---------

src/normal.cc

@@ -524,6 +524,7 @@ void select_object(Context& context)
             { { Key::Modifiers::None, 'w' }, std::bind(select_whole_word<false>, _1, flags & SurroundFlags::Inner) },
             { { Key::Modifiers::None, 'W' }, std::bind(select_whole_word<true>, _1, flags & SurroundFlags::Inner) },
             { { Key::Modifiers::None, 's' }, std::bind(select_whole_sentence, _1, flags & SurroundFlags::Inner) },
+            { { Key::Modifiers::None, 'p' }, std::bind(select_whole_paragraph, _1, flags & SurroundFlags::Inner) },
         };
 
         auto it = key_to_selector.find(key);

src/selectors.cc

@@ -421,6 +421,40 @@ Selection select_whole_sentence(const Selection& selection, bool inner)
     return Selection{first, last};
 }
 
+Selection select_whole_paragraph(const Selection& selection, bool inner)
+{
+    BufferIterator first = selection.last();
+
+    while (not is_begin(first))
+    {
+        char cur = *first;
+        char prev = *(first-1);
+        if (is_eol(prev) and is_eol(cur))
+        {
+            ++first;
+            break;
+        }
+        --first;
+    }
+
+    BufferIterator last = first;
+    while (not is_end(last))
+    {
+        char cur = *last;
+        char prev = *(last-1);
+        if (is_eol(cur) and is_eol(prev))
+        {
+            if (not inner)
+                skip_while(last, is_eol);
+           --last;
+            break;
+        }
+        ++last;
+    }
+
+    return Selection{first, last};
+}
+
 Selection select_whole_lines(const Selection& selection)
 {
     // no need to be utf8 aware for is_eol as we only use \n as line seperator

src/selectors.hh

@@ -28,6 +28,7 @@ Selection select_to_eol_reverse(const Selection& selection);
 template<bool punctuation_is_word>
 Selection select_whole_word(const Selection& selection, bool inner);
 Selection select_whole_sentence(const Selection& selection, bool inner);
+Selection select_whole_paragraph(const Selection& selection, bool inner);
 Selection select_whole_lines(const Selection& selection);
 Selection select_whole_buffer(const Selection& selection);
 Selection trim_partial_lines(const Selection& selection);