Preliminary implementation of border-less mode

Not yet functional but most ingredients are there

data/core/config.lua

@@ -22,6 +22,7 @@ config.transitions = true
 config.animation_rate = 1.0
 config.blink_period = 0.8
 config.draw_whitespace = false
+config.borderless = true
 
 -- Disable plugin loading setting to false the config entry
 -- of the same name.

data/core/init.lua

@@ -6,6 +6,7 @@ local command
 local keymap
 local RootView
 local StatusView
+local TitleView
 local CommandView
 local NagView
 local DocView
@@ -358,6 +359,7 @@ function core.init()
   keymap = require "core.keymap"
   RootView = require "core.rootview"
   StatusView = require "core.statusview"
+  TitleView = require "core.titleview"
   CommandView = require "core.commandview"
   NagView = require "core.nagview"
   DocView = require "core.docview"
@@ -398,6 +400,11 @@ function core.init()
     end
   end
 
+  if config.borderless then
+    system.set_window_bordered(false)
+    system.set_window_hit_test()
+  end
+
   core.frame_start = 0
   core.clip_rect_stack = {{ 0,0,0,0 }}
   core.log_items = {}
@@ -430,9 +437,12 @@ function core.init()
   core.command_view = CommandView()
   core.status_view = StatusView()
   core.nag_view = NagView()
+  core.title_view = TitleView()
 
   local cur_node = core.root_view.root_node
   cur_node.is_primary_node = true
+  cur_node:split("up", core.title_view, {y = true})
+  cur_node = cur_node.b
   cur_node:split("up", core.nag_view, {y = true})
   cur_node = cur_node.b
   cur_node = cur_node:split("down", core.command_view, {y = true})
@@ -828,7 +838,7 @@ local function get_title_filename(view)
 end
 
 
-local function compose_window_title(title)
+function core.compose_window_title(title)
   return title == "" and "Lite XL" or title .. " - Lite XL"
 end
 
@@ -877,7 +887,7 @@ function core.step()
   -- update window title
   local current_title = get_title_filename(core.active_view)
   if current_title ~= core.window_title then
-    system.set_window_title(compose_window_title(current_title))
+    system.set_window_title(core.compose_window_title(current_title))
     core.window_title = current_title
   end
 

data/core/titleview.lua

@@ -0,0 +1,30 @@
+local core = require "core"
+local style = require "core.style"
+local StatusView = require "core.statusview"
+
+
+local TitleView = StatusView:extend()
+
+TitleView.separator = " "
+
+function TitleView:new()
+  TitleView.super.new(self)
+end
+
+
+function TitleView:on_mouse_pressed()
+  core.set_active_view(core.last_active_view)
+end
+
+
+function TitleView:get_items()
+  local title = core.compose_window_title(core.window_title)
+  return {
+    style.text, style.icon_font, "g ", style.font, title,
+  }, {
+    style.text, style.icon_font, "_", TitleView.separator, "w", TitleView.separator, "W",
+  }
+end
+
+
+return TitleView

dev-utils/fontello-config-small.json

@@ -83,6 +83,24 @@
       "css": "cancel-1",
       "code": 67,
       "src": "fontawesome"
+    },
+    {
+      "uid": "04f022b8bd044d4ccfffd3887ff72088",
+      "css": "window-minimize",
+      "code": 95,
+      "src": "fontawesome"
+    },
+    {
+      "uid": "d0e62145dbf40f30e47b3819b8b43a8f",
+      "css": "window-restore",
+      "code": 119,
+      "src": "fontawesome"
+    },
+    {
+      "uid": "7394501fc0b17cb7bda99538f92e26d6",
+      "css": "window-close",
+      "code": 87,
+      "src": "fontawesome"
     }
   ]
-}
+}

src/api/system.c

@@ -35,6 +35,44 @@ static char* key_name(char *dst, int sym) {
   return dst;
 }
 
+// FIXME: shouldn't be hard-coded but should depend on TitleView's height
+#define TITLE_BAR_WIDTH 100
+#define RESIZE_BORDER 40
+
+static SDL_HitTestResult SDLCALL
+hit_test(SDL_Window *window, const SDL_Point *pt, void *data) {
+  int w, h;
+
+  SDL_GetWindowSize(window, &w, &h);
+
+  if (pt->y < TITLE_BAR_WIDTH && pt->x > RESIZE_BORDER && pt->x < w - RESIZE_BORDER) {
+    return SDL_HITTEST_DRAGGABLE;
+  }
+
+  #define REPORT_RESIZE_HIT(name) { \
+    return SDL_HITTEST_RESIZE_##name; \
+  }
+
+  if (pt->x < RESIZE_BORDER && pt->y < RESIZE_BORDER) {
+    REPORT_RESIZE_HIT(TOPLEFT);
+  } else if (pt->x > RESIZE_BORDER && pt->x < w - RESIZE_BORDER && pt->y < RESIZE_BORDER) {
+    REPORT_RESIZE_HIT(TOP);
+  } else if (pt->x > w - RESIZE_BORDER && pt->y < RESIZE_BORDER) {
+    REPORT_RESIZE_HIT(TOPRIGHT);
+  } else if (pt->x > w - RESIZE_BORDER && pt->y > RESIZE_BORDER && pt->y < h - RESIZE_BORDER) {
+    REPORT_RESIZE_HIT(RIGHT);
+  } else if (pt->x > w - RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
+    REPORT_RESIZE_HIT(BOTTOMRIGHT);
+  } else if (pt->x < w - RESIZE_BORDER && pt->x > RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
+    REPORT_RESIZE_HIT(BOTTOM);
+  } else if (pt->x < RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
+    REPORT_RESIZE_HIT(BOTTOMLEFT);
+  } else if (pt->x < RESIZE_BORDER && pt->y < h - RESIZE_BORDER && pt->y > RESIZE_BORDER) {
+    REPORT_RESIZE_HIT(LEFT);
+  }
+
+  return SDL_HITTEST_NORMAL;
+}
 
 static int f_poll_event(lua_State *L) {
   char buf[16];
@@ -201,6 +239,23 @@ static int f_set_window_mode(lua_State *L) {
 }
 
 
+static int f_set_window_bordered(lua_State *L) {
+  int bordered = lua_toboolean(L, 1);
+  SDL_SetWindowBordered(window, bordered);
+  return 0;
+}
+
+
+static int f_set_window_hit_test(lua_State *L) {
+  if (SDL_SetWindowHitTest(window, hit_test, NULL) == -1) {
+    lua_pushboolean(L, 0);
+  } else {
+    lua_pushboolean(L, 1);
+  }
+  return 1;
+}
+
+
 static int f_get_window_size(lua_State *L) {
   int x, y, w, h;
   SDL_GetWindowSize(window, &w, &h);
@@ -441,6 +496,8 @@ static const luaL_Reg lib[] = {
   { "set_cursor",          f_set_cursor          },
   { "set_window_title",    f_set_window_title    },
   { "set_window_mode",     f_set_window_mode     },
+  { "set_window_bordered", f_set_window_bordered },
+  { "set_window_hit_test", f_set_window_hit_test },
   { "get_window_size",     f_get_window_size     },
   { "set_window_size",     f_set_window_size     },
   { "window_has_focus",    f_window_has_focus    },