Increase modelinefmt configuration power

README.asciidoc

@@ -970,7 +970,10 @@ Some options are built in Kakoune, and can be used to control it's behaviour:
  on the filesystem.
  * `modelinefmt` _string_: A format string used to generate the mode line, that
  string is first expanded as a command line would be (expanding `%...{...}`
- strings), then markup tags are applied (see <<Markup strings>>).
+ strings), then markup tags are applied (see <<Markup strings>>). Two special
+ atom are available as markup: `{{mode_info}}` with information about the current
+ mode (example `insert 3 sel`), and `{{context_info}}` with information such as 
+ if the file has been modified (with `[+]`), or if it is new (with `[new file]`).
  * `ui_options`: colon separated list of key=value pairs that are forwarded to
  the user interface implementation. The NCurses UI support the following options:
  - `ncurses_set_title`: if `yes` or `true`, the terminal emulator title will

doc/manpages/options.asciidoc

@@ -137,7 +137,19 @@ Builtin options
 *modelinefmt* 'string'::
  A format string used to generate the mode line, that string is first
  expanded as a command line would be (expanding '%...{...}' strings),
- then markup tags are applied (c.f. the 'Expansions' documentation page)
+ then markup tags are applied (c.f. the 'Expansions' documentation page.)
+ Two special atoms are available as markup:
+
+ *`{{mode_info}}`*:::
+ Information about the current mode, such as `insert 3 sel` or
+ `prompt`. The faces used are StatusLineMode, StatusLineInfo,
+ and StatusLineValue.
+
+ *`{{context_info}}`*:::
+ Information such as `[+][recording (@)][no-hooks][new file][fifo]`,
+ in face Information.
+
+ The default value is '%val{bufname} %val{cursor_line}:%val{cursor_char_column} {{context_info}} {{mode_info}} - %val{client}@[%val{session}]'
 
 *ui_options*::
  colon separated list of key=value pairs that are forwarded to the user

src/client.cc

@@ -11,6 +11,7 @@
 #include "event_manager.hh"
 #include "user_interface.hh"
 #include "window.hh"
+#include "hash_map.hh"
 
 #include <csignal>
 #include <unistd.h>
@@ -117,39 +118,40 @@ DisplayCoord Client::dimensions() const
  return m_ui->dimensions();
 }
 
+String generate_context_info(const Context& context)
+{
+ String s = "";
+ if (context.buffer().is_modified())
+ s += "[+]";
+ if (context.client().input_handler().is_recording())
+ s += format("[recording ({})]", context.client().input_handler().recording_reg());
+ if (context.buffer().flags() & Buffer::Flags::New)
+ s += "[new file]";
+ if (context.hooks_disabled())
+ s += "[no-hooks]";
+ if (context.buffer().flags() & Buffer::Flags::Fifo)
+ s += "[fifo]";
+ return s;
+}
+
 DisplayLine Client::generate_mode_line() const
 {
  DisplayLine modeline;
  try
  {
  const String& modelinefmt = context().options()["modelinefmt"].get<String>();
-
- modeline = parse_display_line(expand(modelinefmt, context(), ShellContext{},
- [](String s) { return escape(s, '{', '\\'); }));
+ HashMap<String, DisplayLine> atoms{{ "mode_info", context().client().input_handler().mode_line() },
+ { "context_info", {generate_context_info(context()), get_face("Information")}}};
+ auto expanded = expand(modelinefmt, context(), ShellContext{},
+ [](String s) { return escape(s, '{', '\\'); });
+ modeline = parse_display_line(expanded, atoms);
  }
  catch (runtime_error& err)
  {
  write_to_debug_buffer(format("Error while parsing modelinefmt: {}", err.what()));
  modeline.push_back({ "modelinefmt error, see *debug* buffer", get_face("Error") });
  }
 
- Face info_face = get_face("Information");
-
- if (context().buffer().is_modified())
- modeline.push_back({ "[+]", info_face });
- if (m_input_handler.is_recording())
- modeline.push_back({ format("[recording ({})]", m_input_handler.recording_reg()), info_face });
- if (context().buffer().flags() & Buffer::Flags::New)
- modeline.push_back({ "[new file]", info_face });
- if (context().hooks_disabled())
- modeline.push_back({ "[no-hooks]", info_face });
- if (context().buffer().flags() & Buffer::Flags::Fifo)
- modeline.push_back({ "[fifo]", info_face });
- modeline.push_back({ " " });
- for (auto& atom : m_input_handler.mode_line())
- modeline.push_back(std::move(atom));
- modeline.push_back({ format(" - {}@[{}]", context().name(), Server::instance().session()) });
-
  return modeline;
 }
 

src/display_buffer.cc

@@ -286,7 +286,7 @@ void DisplayBuffer::optimize()
  line.optimize();
 }
 
-DisplayLine parse_display_line(StringView line)
+DisplayLine parse_display_line(StringView line, const HashMap<String, DisplayLine>& builtins)
 {
  DisplayLine res;
  bool was_antislash = false;
@@ -312,7 +312,18 @@ DisplayLine parse_display_line(StringView line)
  auto closing = std::find(it+1, end, '}');
  if (closing == end)
  throw runtime_error("unclosed face definition");
- face = get_face({it+1, closing});
+ if (*(it+1) == '{' and closing+1 != end and *(closing+1) == '}')
+ {
+ auto builtin_it = builtins.find(StringView{it+2, closing});
+ if (builtin_it == builtins.end())
+ throw runtime_error(format("undefined atom {}", StringView{it+2, closing}));
+ for (auto& atom : builtin_it->value)
+ res.push_back(atom);
+ // closing is now at the first char of "}}", advance it to the second
+ ++closing;
+ }
+ else
+ face = get_face({it+1, closing});
  it = closing;
  pos = closing + 1;
  }

src/display_buffer.hh

@@ -6,6 +6,7 @@
 #include "coord.hh"
 #include "string.hh"
 #include "vector.hh"
+#include "hash_map.hh"
 
 namespace Kakoune
 {
@@ -143,7 +144,7 @@ private:
  AtomList m_atoms;
 };
 
-DisplayLine parse_display_line(StringView line);
+DisplayLine parse_display_line(StringView line, const HashMap<String, DisplayLine>& builtins = {});
 
 class DisplayBuffer : public UseMemoryDomain<MemoryDomain::Display>
 {

src/main.cc

@@ -43,7 +43,9 @@ static const char* startup_info =
 " * The `identifier` face has been replaced with `variable`,\n"
 " `function` and `module`, update your custom colorschemes\n"
 " * BufNew and BufOpen hooks have been renamed to BufNewFile\n"
-" and BufOpenFile.\n";
+" and BufOpenFile.\n"
+" * The status line can be further customized.\n"
+" See `help options modelinefmt`.\n";
 
 struct startup_error : runtime_error
 {
@@ -154,7 +156,8 @@ void register_env_vars()
  "window_height", false,
  [](StringView name, const Context& context) -> String
  { return to_string(context.window().dimensions().line); }
- } };
+ }
+ };
 
  ShellManager& shell_manager = ShellManager::instance();
  for (auto& env_var : env_vars)
@@ -306,7 +309,8 @@ void register_options()
  " ncurses_wheel_down_button int\n",
  UserInterface::Options{});
  reg.declare_option("modelinefmt", "format string used to generate the modeline",
- "%val{bufname} %val{cursor_line}:%val{cursor_char_column} "_str);
+ "%val{bufname} %val{cursor_line}:%val{cursor_char_column} {{context_info}} {{mode_info}} - %val{client}@[%val{session}]"_str);
+
  reg.declare_option("debug", "various debug flags", DebugFlags::None);
  reg.declare_option("readonly", "prevent buffers from being modified", false);
  reg.declare_option<String, check_extra_word_char>(

test/highlight/regions/display

@@ -1,5 +1,5 @@
 { "jsonrpc": "2.0", "method": "draw", "params": [[[{ "face": { "fg": "black", "bg": "white", "attributes": [] }, "contents": "\"" }, { "face": { "fg": "green", "bg": "default", "attributes": [] }, "contents": "abcdefgh\"" }, { "face": { "fg": "yellow", "bg": "default", "attributes": [] }, "contents": " hehe " }, { "face": { "fg": "red", "bg": "default", "attributes": [] }, "contents": "${ youhou{hihi} }" }, { "face": { "fg": "yellow", "bg": "default", "attributes": [] }, "contents": "\u000a" }, { "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": "" }]], { "fg": "default", "bg": "default", "attributes": [] }, { "fg": "blue", "bg": "default", "attributes": [] }] }
 { "jsonrpc": "2.0", "method": "menu_hide", "params": [] }
 { "jsonrpc": "2.0", "method": "info_hide", "params": [] }
-{ "jsonrpc": "2.0", "method": "draw_status", "params": [[], [{ "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": "out 1:1 " }, { "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": " " }, { "face": { "fg": "blue", "bg": "default", "attributes": [] }, "contents": "1 sel" }, { "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": " - unnamed0@[kak-tests]" }], { "fg": "cyan", "bg": "default", "attributes": [] }] }
+{ "jsonrpc": "2.0", "method": "draw_status", "params": [[], [{ "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": "out 1:1 " }, { "face": { "fg": "black", "bg": "yellow", "attributes": [] }, "contents": "" }, { "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": " " }, { "face": { "fg": "blue", "bg": "default", "attributes": [] }, "contents": "1 sel" }, { "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": " - unnamed0@[kak-tests]" }], { "fg": "cyan", "bg": "default", "attributes": [] }] }
 { "jsonrpc": "2.0", "method": "refresh", "params": [true] }

test/regression/638-highlight-codepoint-with-bracket/display

@@ -1,5 +1,5 @@
 { "jsonrpc": "2.0", "method": "draw", "params": [[[{ "face": { "fg": "red", "bg": "default", "attributes": [] }, "contents": "“" }, { "face": { "fg": "white", "bg": "blue", "attributes": [] }, "contents": "We" }, { "face": { "fg": "black", "bg": "white", "attributes": [] }, "contents": " " }, { "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": "ought to scrape this planet clean of every living thing on it," }, { "face": { "fg": "red", "bg": "default", "attributes": [] }, "contents": "”" }, { "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": "\u000a" }]], { "fg": "default", "bg": "default", "attributes": [] }, { "fg": "blue", "bg": "default", "attributes": [] }] }
 { "jsonrpc": "2.0", "method": "menu_hide", "params": [] }
 { "jsonrpc": "2.0", "method": "info_hide", "params": [] }
-{ "jsonrpc": "2.0", "method": "draw_status", "params": [[], [{ "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": "out 1:4 " }, { "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": " " }, { "face": { "fg": "blue", "bg": "default", "attributes": [] }, "contents": "1 sel" }, { "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": " - unnamed0@[kak-tests]" }], { "fg": "cyan", "bg": "default", "attributes": [] }] }
+{ "jsonrpc": "2.0", "method": "draw_status", "params": [[], [{ "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": "out 1:4 " }, { "face": { "fg": "black", "bg": "yellow", "attributes": [] }, "contents": "" }, { "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": " " }, { "face": { "fg": "blue", "bg": "default", "attributes": [] }, "contents": "1 sel" }, { "face": { "fg": "default", "bg": "default", "attributes": [] }, "contents": " - unnamed0@[kak-tests]" }], { "fg": "cyan", "bg": "default", "attributes": [] }] }
 { "jsonrpc": "2.0", "method": "refresh", "params": [true] }