Add jump list support to context

jump forward is bound to ctrl-i
jump backward is bound to ctrl-o

switch buffers or jumping somewhere in the buffer push the current
position to the jump list.

when a buffer is deleted, all entries referencing it in jump lists
are erased.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/commands.cc b/src/commands.cc
index 55fcf2ff..899b4fd4 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -283,6 +283,9 @@ void edit(const CommandParameters& params, Context& context)
 
     BufferManager::instance().set_last_used_buffer(*buffer);
 
+    if (buffer != &context.buffer() or param_count > 1)
+        context.push_jump();
+
     if (buffer != &context.buffer())
     {
         auto& manager = ClientManager::instance();
@@ -385,6 +388,7 @@ void show_buffer(const CommandParameters& params, Context& context)
 
     if (buffer != &context.buffer())
     {
+        context.push_jump();
         auto& manager = ClientManager::instance();
         context.change_editor(manager.get_unused_window_for_buffer(*buffer));
     }