From 9439d2802893b35594acc94329f57fe16a128e54 Mon Sep 17 00:00:00 2001
From: Maxime Coste <frrrwww@gmail.com>
Date: Fri, 4 Jul 2014 19:05:00 +0100
Subject: [PATCH] More consistent <space> and <a-space> behaviour

<space> and <a-space> without count now remove all except/keep
main selection. Without reducing main selection to cursor.

Reduce to cursor is moved to ';' and flip selections to <a-;>
---
 src/normal.cc    |  9 +++++----
 src/selectors.hh | 21 ++++++---------------
 2 files changed, 11 insertions(+), 19 deletions(-)

diff --git a/src/normal.cc b/src/normal.cc
index 4af47ada..54348a9b 100644
--- a/src/normal.cc
+++ b/src/normal.cc
@@ -1295,10 +1295,11 @@ KeyMap keymap =
     { ':', command },
     { '|', pipe<InsertMode::Replace> },
     { alt('|'), pipe<InsertMode::Append> },
-    { ' ', [](Context& context, int count) { if (count == 0) clear_selections(context.selections());
-                                             else keep_selection(context.selections(), count-1); } },
-    { alt(' '), [](Context& context, int count) { if (count == 0) flip_selections(context.selections());
-                                                  else remove_selection(context.selections(), count-1); } },
+    { ' ', [](Context& context, int count) { keep_selection(context.selections(), count ? count-1 : context.selections().main_index()); } },
+    { alt(' '), [](Context& context, int count) { remove_selection(context.selections(), count ? count-1 : context.selections().main_index()); } },
+    { ';', [](Context& context, int count) { clear_selections(context.selections()); } },
+    { alt(';'), [](Context& context, int count) { flip_selections(context.selections()); } },
+
     { 'w', repeated(make_select<SelectMode::Replace>(select_to_next_word<Word>)) },
     { 'e', repeated(make_select<SelectMode::Replace>(select_to_next_word_end<Word>)) },
     { 'b', repeated(make_select<SelectMode::Replace>(select_to_previous_word<Word>)) },
diff --git a/src/selectors.hh b/src/selectors.hh
index 191a15dc..c4aa42ea 100644
--- a/src/selectors.hh
+++ b/src/selectors.hh
@@ -11,12 +11,8 @@ namespace Kakoune
 
 inline void clear_selections(SelectionList& selections)
 {
-    auto& sel = selections.main();
-    auto& pos = sel.cursor();
-    sel.anchor() = pos;
-    selections.avoid_eol();
-
-    selections = SelectionList{ selections.buffer(), std::move(sel) };
+    for (auto& sel : selections)
+        sel.anchor() = sel.cursor();
 }
 
 inline void flip_selections(SelectionList& selections)
@@ -29,10 +25,7 @@ inline void flip_selections(SelectionList& selections)
 inline void keep_selection(SelectionList& selections, int index)
 {
     if (index < selections.size())
-    {
-        size_t real_index = (index + selections.main_index() + 1) % selections.size();
-        selections = SelectionList{ selections.buffer(), std::move(selections[real_index]) };
-    }
+        selections = SelectionList{ selections.buffer(), std::move(selections[index]) };
     selections.check_invariant();
 }
 
@@ -40,12 +33,10 @@ inline void remove_selection(SelectionList& selections, int index)
 {
     if (selections.size() > 1 and index < selections.size())
     {
-        size_t real_index = (index + selections.main_index() + 1) % selections.size();
-        selections.remove(real_index);
+        selections.remove(index);
         size_t main_index = selections.main_index();
-        if (real_index <= main_index)
-            selections.set_main_index((main_index > 0 ? main_index
-                                         : selections.size()) - 1);
+        if (index < main_index or main_index == selections.size())
+            selections.set_main_index(main_index - 1);
     }
     selections.check_invariant();
 }