vis: refactor status line handling

Make window status bar content configurable via Lua.

11 files changed, 125 insertions, 62 deletions

diff --git a/main.c b/main.c
index 2bc55de..64d1c07 100644
--- a/main.c
+++ b/main.c
@@ -2190,6 +2190,7 @@ int main(int argc, char *argv[]) {
 		.win_close = vis_lua_win_close,
 		.win_highlight = vis_lua_win_highlight,
 		.win_syntax = vis_lua_win_syntax,
+		.win_status = vis_lua_win_status,
 	};
 
 	vis = vis_new(ui_curses_new(), &event);
diff --git a/ui-curses.c b/ui-curses.c
index ce4ef03..d4131da 100644
--- a/ui-curses.c
+++ b/ui-curses.c
@@ -631,44 +631,6 @@ static bool ui_window_draw_sidebar(UiCursesWin *win) {
 	}
 }
 
-static void ui_window_draw_status(UiWin *w) {
-	UiCursesWin *win = (UiCursesWin*)w;
-	if (!win->winstatus)
-		return;
-	UiCurses *uic = win->ui;
-	Vis *vis = uic->vis;
-	bool focused = uic->selwin == win;
-	const char *filename = win->file->name;
-	const char *status = vis_mode_status(vis);
-	wattrset(win->winstatus, focused ? A_REVERSE|A_BOLD : A_REVERSE);
-	mvwhline(win->winstatus, 0, 0, ' ', win->width);
-	mvwprintw(win->winstatus, 0, 0, "%s %s %s %s",
-	          focused && status ? status : "",
-	          filename ? filename : "[No Name]",
-	          text_modified(win->file->text) ? "[+]" : "",
-	          vis_macro_recording(vis) ? "recording": "");
-
-	char buf[4*32] = "", *msg = buf;
-	int cursor_count = view_cursors_count(win->view);
-	if (cursor_count > 1) {
-		Cursor *c = view_cursors_primary_get(win->view);
-		int cursor_number = view_cursors_number(c) + 1;
-		msg += sprintf(msg, "[%d/%d] ", cursor_number, cursor_count);
-	}
-
-	if (!(win->options & UI_OPTION_LARGE_FILE)) {
-		Cursor *cur = view_cursors_primary_get(win->view);
-		size_t line = view_cursors_line(cur);
-		size_t col = view_cursors_col(cur);
-		if (col > UI_LARGE_FILE_LINE_SIZE)
-			win->options |= UI_OPTION_LARGE_FILE;
-		msg += sprintf(msg, "%zu, %zu", line, col);
-	}
-
-	if (buf[0])
-		mvwaddstr(win->winstatus, 0, win->width - (msg - buf) - 1, buf);
-}
-
 static void ui_window_status(UiWin *w, const char *status) {
 	UiCursesWin *win = (UiCursesWin*)w;
 	if (!win->winstatus)
@@ -745,9 +707,6 @@ static void ui_window_draw(UiWin *w) {
 	}
 
 	wclrtobot(win->win);
-
-	if (win->winstatus)
-		ui_window_draw_status(w);
 }
 
 static void ui_window_reload(UiWin *w, File *file) {
@@ -996,7 +955,6 @@ static UiWin *ui_window_new(Ui *ui, View *view, File *file, enum UiOption option
 
 	win->uiwin = (UiWin) {
 		.draw = ui_window_draw,
-		.draw_status = ui_window_draw_status,
 		.status = ui_window_status,
 		.options_set = ui_window_options_set,
 		.options_get = ui_window_options_get,
diff --git a/ui.h b/ui.h
index bd48459..26f2227 100644
--- a/ui.h
+++ b/ui.h
@@ -75,7 +75,6 @@ struct Ui {
 
 struct UiWin {
 	void (*draw)(UiWin*);
-	void (*draw_status)(UiWin*);
 	void (*status)(UiWin*, const char *txt);
 	void (*reload)(UiWin*, File*);
 	void (*options_set)(UiWin*, enum UiOption);
diff --git a/view.c b/view.c
index e67dc42..4b06d3a 100644
--- a/view.c
+++ b/view.c
@@ -439,8 +439,8 @@ void view_update(View *view) {
 	if (!view->need_update)
 		return;
 
-	if (view->events->highlight)
-		view->events->highlight(view->events->data);
+	if (view->events->draw)
+		view->events->draw(view->events->data);
 
 	if (view->colorcolumn > 0) {
 		size_t lineno = 0;
diff --git a/view.h b/view.h
index 2e58593..8cd2ce3 100644
--- a/view.h
+++ b/view.h
@@ -14,7 +14,7 @@ typedef struct Selection Selection;
 
 typedef struct {
 	void *data;
-	void (*highlight)(void *data);
+	void (*draw)(void *data);
 } ViewEvent;
 
 typedef struct {
diff --git a/vis-lua.c b/vis-lua.c
index e893885..fdc4fd2 100644
--- a/vis-lua.c
+++ b/vis-lua.c
@@ -32,6 +32,48 @@ void vis_lua_win_highlight(Vis *vis, Win *win, size_t horizon) { }
 bool vis_lua_win_syntax(Vis *vis, Win *win, const char *syntax) { return true; }
 bool vis_theme_load(Vis *vis, const char *name) { return true; }
 
+void vis_lua_win_status(Vis *vis, Win *win) {
+	char status[1024], left[256], right[256], cursors[32] = "", pos[32] = "";
+	int width = vis_window_width_get(win);
+	int delim_len = 1, delim_count = 0;
+	enum UiOption options = view_options_get(win->view);
+	const char *filename = win->file->name;
+	const char *mode = vis->mode->status;
+
+	int left_len = snprintf(left, sizeof(left)-1, "%s%s%s%s%s",
+	          mode ? mode : "",
+	          mode && ++delim_count ? " » " : "",
+	          filename ? filename : "[No Name]",
+	          text_modified(win->file->text) ? " [+]" : "",
+	          vis_macro_recording(vis) ? " @": "");
+
+	int cursor_count = view_cursors_count(win->view);
+	if (cursor_count > 1) {
+		Cursor *c = view_cursors_primary_get(win->view);
+		int cursor_number = view_cursors_number(c) + 1;
+		snprintf(cursors, sizeof(cursors)-1, "%d/%d", cursor_number, cursor_count);
+	}
+
+	if (!(options & UI_OPTION_LARGE_FILE)) {
+		Cursor *cur = view_cursors_primary_get(win->view);
+		size_t line = view_cursors_line(cur);
+		size_t col = view_cursors_col(cur);
+		if (col > UI_LARGE_FILE_LINE_SIZE) {
+			options |= UI_OPTION_LARGE_FILE;
+			view_options_set(win->view, options);
+		}
+		snprintf(pos, sizeof(pos)-1, "%zu, %zu", line, col);
+	}
+
+	int right_len = snprintf(right, sizeof(right)-1, "%s%s%s",
+		cursors, cursors[0] && pos[0] && ++delim_count ? " « " : "", pos);
+	int spaces = width - left_len - right_len - 2 + delim_count*delim_len;
+	if (spaces < 1)
+		spaces = 1;
+	snprintf(status, sizeof(status)-1, " %s%*s%s ", left, spaces, " ", right);
+	vis_window_status(win, status);
+}
+
 #else
 
 #if 0
@@ -1332,6 +1374,16 @@ bool vis_lua_win_syntax(Vis *vis, Win *win, const char *syntax) {
 	return ret;
 }
 
+void vis_lua_win_status(Vis *vis, Win *win) {
+	lua_State *L = vis->lua;
+	vis_lua_event_get(L, "win_status");
+	if (lua_isfunction(L, -1)) {
+		obj_ref_new(L, win, "vis.window");
+		pcall(vis, L, 1, 0);
+	}
+	lua_pop(L, 1);
+}
+
 bool vis_theme_load(Vis *vis, const char *name) {
 	lua_State *L = vis->lua;
 	vis_lua_event_get(L, "theme_change");
diff --git a/vis-lua.h b/vis-lua.h
index 8811f55..644ce73 100644
--- a/vis-lua.h
+++ b/vis-lua.h
@@ -27,5 +27,6 @@ void vis_lua_win_open(Vis*, Win*);
 void vis_lua_win_close(Vis*, Win*);
 void vis_lua_win_highlight(Vis*, Win*, size_t horizon);
 bool vis_lua_win_syntax(Vis*, Win*, const char *syntax);
+void vis_lua_win_status(Vis*, Win*);
 
 #endif
diff --git a/vis-modes.c b/vis-modes.c
index ad866f7..eb4bfb0 100644
--- a/vis-modes.c
+++ b/vis-modes.c
@@ -18,7 +18,8 @@ void mode_set(Vis *vis, Mode *new_mode) {
 	vis->mode = new_mode;
 	if (new_mode->enter)
 		new_mode->enter(vis, vis->mode_prev);
-	vis->win->ui->draw_status(vis->win->ui);
+	if (vis->event && vis->event->win_status)
+		vis->event->win_status(vis, vis->win);
 }
 
 void vis_mode_switch(Vis *vis, enum VisMode mode) {
@@ -166,13 +167,12 @@ Mode vis_modes[] = {
 	[VIS_MODE_NORMAL] = {
 		.id = VIS_MODE_NORMAL,
 		.name = "NORMAL",
-		.status = "",
 		.help = "",
 	},
 	[VIS_MODE_VISUAL] = {
 		.id = VIS_MODE_VISUAL,
 		.name = "VISUAL",
-		.status = "--VISUAL--",
+		.status = "VISUAL",
 		.help = "",
 		.enter = vis_mode_visual_enter,
 		.leave = vis_mode_visual_leave,
@@ -182,7 +182,7 @@ Mode vis_modes[] = {
 		.id = VIS_MODE_VISUAL_LINE,
 		.name = "VISUAL LINE",
 		.parent = &vis_modes[VIS_MODE_VISUAL],
-		.status = "--VISUAL LINE--",
+		.status = "VISUAL-LINE",
 		.help = "",
 		.enter = vis_mode_visual_line_enter,
 		.leave = vis_mode_visual_line_leave,
@@ -191,7 +191,7 @@ Mode vis_modes[] = {
 	[VIS_MODE_INSERT] = {
 		.id = VIS_MODE_INSERT,
 		.name = "INSERT",
-		.status = "--INSERT--",
+		.status = "INSERT",
 		.help = "",
 		.enter = vis_mode_insert_enter,
 		.leave = vis_mode_insert_leave,
@@ -203,7 +203,7 @@ Mode vis_modes[] = {
 		.id = VIS_MODE_REPLACE,
 		.name = "REPLACE",
 		.parent = &vis_modes[VIS_MODE_INSERT],
-		.status = "--REPLACE--",
+		.status = "REPLACE",
 		.help = "",
 		.enter = vis_mode_replace_enter,
 		.leave = vis_mode_replace_leave,
diff --git a/vis.c b/vis.c
index 3fabe5b..a5a2e1b 100644
--- a/vis.c
+++ b/vis.c
@@ -157,11 +157,17 @@ static void window_free(Win *win) {
 	free(win);
 }
 
-static void window_highlight(void *ctx) {
+static void window_draw(void *ctx) {
 	Win *win = ctx;
+	if (!win->ui)
+		return;
 	Vis *vis = win->vis;
-	if (!win->file->internal && vis->event && vis->event->win_highlight)
-		vis->event->win_highlight(vis, win, win->horizon);
+	if (!win->file->internal && vis->event) {
+		if (win->lexer_name && vis->event->win_highlight)
+			vis->event->win_highlight(vis, win, win->horizon);
+		if (vis->event->win_status)
+			vis->event->win_status(vis, win);
+	}
 }
 
 Win *window_new_file(Vis *vis, File *file) {
@@ -172,6 +178,7 @@ Win *window_new_file(Vis *vis, File *file) {
 	win->file = file;
 	win->jumplist = ringbuf_alloc(31);
 	win->event.data = win;
+	win->event.draw = window_draw;
 	win->horizon = 1 << 15;
 	win->view = view_new(file->text, &win->event);
 	win->ui = vis->ui->window_new(vis->ui, win->view, file, UI_OPTION_STATUSBAR);
@@ -268,7 +275,6 @@ bool vis_window_syntax_set(Win *win, const char *syntax) {
 	}
 	free(win->lexer_name);
 	win->lexer_name = syntax ? strdup(syntax) : NULL;
-	win->event.highlight = syntax ? window_highlight : NULL;
 	return !syntax || win->lexer_name;
 }
 
@@ -1133,10 +1139,6 @@ void vis_exit(Vis *vis, int status) {
 	vis->exit_status = status;
 }
 
-const char *vis_mode_status(Vis *vis) {
-	return vis->mode->status;
-}
-
 void vis_insert_tab(Vis *vis) {
 	if (!vis->expandtab) {
 		vis_insert_key(vis, "\t", 1);
diff --git a/vis.h b/vis.h
index 7dde13f..d699085 100644
--- a/vis.h
+++ b/vis.h
@@ -35,6 +35,7 @@ typedef struct {
 	void (*win_close)(Vis*, Win*);
 	void (*win_highlight)(Vis*, Win*, size_t horizon);
 	bool (*win_syntax)(Vis*, Win*, const char *syntax);
+	void (*win_status)(Vis*, Win*);
 } VisEvent;
 
 typedef union { /* various types of arguments passed to key action functions */
@@ -162,8 +163,6 @@ bool vis_window_mode_map(Win*, enum VisMode, bool force, const char *key, const
 /* in the specified mode: unmap a given key, fails if the key is not currently mapped */
 bool vis_mode_unmap(Vis*, enum VisMode, const char *key);
 bool vis_window_mode_unmap(Win*, enum VisMode, const char *key);
-/* get the current mode's status line indicator */
-const char *vis_mode_status(Vis*);
 /* associates the special pseudo key <keyaction->name> with the given key action.
  * after successfull registration the pseudo key can be used key binding aliases */
 bool vis_action_register(Vis*, const KeyAction*);
diff --git a/vis.lua b/vis.lua
index 297c09e..c47d49f 100644
--- a/vis.lua
+++ b/vis.lua
@@ -282,3 +282,54 @@ vis.events.win_highlight = function(win, horizon_max)
 		token_start = token_end
 	end
 end
+
+local modes = {
+	[vis.MODE_NORMAL] = '',
+	[vis.MODE_OPERATOR_PENDING] = '',
+	[vis.MODE_VISUAL] = 'VISUAL',
+	[vis.MODE_VISUAL_LINE] = 'VISUAL-LINE',
+	[vis.MODE_INSERT] = 'INSERT',
+	[vis.MODE_REPLACE] = 'REPLACE',
+}
+
+vis.events.win_status = function(win)
+	local left = {}
+	local right = {}
+	local file = win.file
+	local cursor = win.cursor
+	local delim_len = 1
+
+	local mode = modes[vis.mode]
+	if mode ~= '' then
+		table.insert(left, mode)
+	end
+
+	table.insert(left, (file.name or '[No Name]') ..
+		(file.modified and ' [+]' or '') .. (vis.recording and ' @' or ''))
+
+	if file.newlines ~= "nl" then
+		table.insert(right, "␊")
+	end
+
+	if #win.cursors > 1 then
+		table.insert(right, cursor.number..'/'..#win.cursors)
+	end
+
+	local size = file.size
+	table.insert(right, (size == 0 and "0" or math.ceil(cursor.pos/size*100)).."%")
+
+	if not win.large then
+		local col = cursor.col
+		table.insert(right, cursor.line..', '..col)
+		if size > 33554432 or col > 65536 then
+			win.large = true
+		end
+	end
+
+	local left_str = ' ' .. table.concat(left, " » ") .. ' '
+	local right_str = ' ' .. table.concat(right, " « ") .. ' '
+	local delim_count = math.max(#left-1, 0) + math.max(#right-1, 0)
+	local spaces = string.rep(' ', win.width - #left_str - #right_str + delim_count*delim_len)
+	local status = left_str .. spaces .. right_str
+	win:status(status)
+end