Detect file external modification and ask the user whether to reload or not

* Buffer now store a m_fs_timestamp field.
* Client in Normal mode checks current buffer file every 500 ms, or
  each time it goes back to Normal mode.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/buffer.cc b/src/buffer.cc
index 770be530..0470884d 100644
--- a/src/buffer.cc
+++ b/src/buffer.cc
@@ -708,4 +708,16 @@ char Buffer::byte_at(BufferCoord c) const
     return m_lines[c.line].content[c.column];
 }
 
+time_t Buffer::fs_timestamp() const
+{
+    kak_assert(m_flags & Flags::File);
+    return m_fs_timestamp;
+}
+
+void Buffer::set_fs_timestamp(time_t ts)
+{
+    kak_assert(m_flags & Flags::File);
+    m_fs_timestamp = ts;
+}
+
 }