Add vdebug remote ruby interface and spec

1 files changed, 68 insertions, 0 deletions

diff --git a/rubylib/vdebug.rb b/rubylib/vdebug.rb
new file mode 100644
index 0000000..88e8cfd
--- /dev/null
+++ b/rubylib/vdebug.rb
@@ -0,0 +1,68 @@
+class Vdebug
+  class BufferNotFound < StandardError; end;
+
+  attr_reader :vim
+
+  def initialize(vim)
+    @vim = vim
+  end
+
+  def start_listening
+    clear_buffer_cache!
+    vim.server.remote_send ":python debugger.run()<CR>"
+    sleep 0.5
+  end
+
+  # Retrieve a hash with the buffer names (values) and numbers (keys)
+  def buffers
+    @buffers ||= fetch_buffers
+  end
+
+  # Do this when you want to refresh the buffer list
+  def clear_buffer_cache!
+    @buffers = nil
+  end
+
+  # Has the vdebug GUI been opened?
+  def gui_open?
+    names = buffers.values
+    %w[DebuggerStack DebuggerStatus DebuggerWatch].all? { |b|
+      names.include? b
+    }
+  end
+
+  def running?
+    gui_open? && connected?
+  end
+
+  def connected?
+     vim.server.remote_send(
+       ":python debugger.runner.is_alive()"
+     ) == "True"
+  end
+
+  def watch_window_content
+    fetch_buffer_content 'DebuggerWatch'
+  end
+
+  def status_window_content
+    fetch_buffer_content 'DebuggerStatus'
+  end
+
+protected
+  def fetch_buffer_content(name)
+    bufnum = buffers.invert.fetch(name)
+    vim.echo(%Q{join(getline(#{bufnum}, "$"), "\\n")})
+  rescue KeyError
+    raise BufferNotFound, "#{name} buffer not found"
+  end
+
+  def fetch_buffers
+    buffer_string = vim.command('buffers')
+    names = buffer_string.split("\n").collect do |bufline|
+      matches = /\A\s*(\d+).*"([^"]+)"/.match(bufline)
+      [matches[1].to_i, matches[2]] if matches
+    end
+    Hash[names.compact]
+  end
+end