From fbaf85f48004fbf895603a2a7295ebb8ad263344 Mon Sep 17 00:00:00 2001 From: LemonBoy Date: Mon, 16 Jul 2012 11:41:34 +0200 Subject: [PATCH] Here we go. --- Makefile | 35 ++++++++++++ README.md | 27 +++++++++ bar.c | 167 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ config.h | 13 +++++ 4 files changed, 242 insertions(+) create mode 100644 Makefile create mode 100644 README.md create mode 100644 bar.c create mode 100644 config.h diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..1e60e3c --- /dev/null +++ b/Makefile @@ -0,0 +1,35 @@ +CC ?= gcc +STRIP ?= strip +CFLAGS ?= -Os +LDFLAGS += -lxcb +CFDEBUG = -g3 -pedantic -Wall -Wunused-parameter -Wlong-long\ + -Wsign-conversion -Wconversion -Wimplicit-function-declaration + +EXEC = bar +SRCS = bar.c +OBJS = ${SRCS:.c=.o} + +PREFIX?=/usr +BINDIR=${PREFIX}/bin + +all: ${EXEC} + +.c.o: + ${CC} ${CFLAGS} -o $@ -c $< + +${EXEC}: ${OBJS} + ${CC} ${LDFLAGS} -o ${EXEC} ${OBJS} + ${STRIP} -s ${EXEC} + +debug: ${EXEC} +debug: CC += ${CFDEBUG} + +clean: + rm -rf ./*.o + rm -rf ./${EXEC} + +install: bar + test -d ${DESTDIR}${BINDIR} || mkdir -p ${DESTDIR}${BINDIR} + install -m755 bar ${DESTDIR}${BINDIR}/bar + +.PHONY: all debug clean install diff --git a/README.md b/README.md new file mode 100644 index 0000000..8df8705 --- /dev/null +++ b/README.md @@ -0,0 +1,27 @@ +b(ar) a(in't) r(ecursive) +========================= +2012 (C) The Lemon Man + +A lightweight bar based on XCB (yay). Provides foreground/background color +switching along with text alignment (screw you dzen!), nothing less and +nothing more. + +Configuration +------------- +Change the config.h file and you're good to go! +The text background and foreground are respectively the first and the second +entries in the palette (COLOR0 and COLOR1). + +Text formatting +--------------- +All the format commands are preceded by a backslash (\\). +To draw a backslash just backslash escape it (\\\\). + +``` +f<0-9> Selects the text foreground color from the palette. +b<0-9> Selects the text background color from the palette. + +l Aligns the text to the left. +c Aligns the text to the center. +r Aligns the text to the right. +``` diff --git a/bar.c b/bar.c new file mode 100644 index 0000000..fbc9168 --- /dev/null +++ b/bar.c @@ -0,0 +1,167 @@ +#include +#include +#include +#include +#include +#include +#include + +#include "config.h" + +// Here be dragons + +static xcb_connection_t *c; +static int ft_height, ft_width; +static xcb_window_t root, win; +static xcb_gcontext_t gc; +static int bw, bh; +static const int pal[] = {COLOR0,COLOR1,COLOR2,COLOR3,COLOR4,COLOR5,COLOR6,COLOR7,COLOR8,COLOR9}; + +#define MIN(a,b) ((a > b ? b : a)) + +int +draw (int x, int align, char *text) +{ + int done = 0; + int pos_x = x; + int len = MIN(bw / ft_width, strlen (text)); + int strw = len * ft_width; + + if (!strw) return x; + + switch (align) { + case 1: + xcb_copy_area (c, win, win, gc, bw / 2 - pos_x / 2, 0, bw / 2 - (pos_x + strw) / 2, 0, pos_x, BAR_HEIGHT); + pos_x = bw / 2 - (pos_x + strw) / 2 + pos_x; + break; + case 2: + xcb_copy_area (c, win, win, gc, bw - pos_x, 0, bw - pos_x - strw, 0, pos_x, BAR_HEIGHT); + pos_x = bw - strw; + break; + } + + do { + xcb_image_text_8 (c, MIN(len - done, 255), win, gc, pos_x, bh - ft_height / 2, text + done); /* Bottom-left coords */ + done += MIN(len - done, 255); + pos_x = done * ft_width; + } while (done < len); + + return pos_x; +} + +void +parse (char *text) +{ + char parsed_text[1000] = {0, }; + + char *p = text; + char *q = parsed_text; + + int pos_x = 0; + int align = 0; + + xcb_clear_area (c, 0, win, 0, 0, bw, BAR_HEIGHT); + for (;;) { + if (*p == 0x0 || *p == 0xA || (*p == '\\' && p++ && *p != '\\' && strchr ("fblcr", *p))) { + pos_x += draw (pos_x, align, parsed_text); + switch (*p++) { + case 0x0: return; /* EOL */ + case 0xA: return; /* NL */ + case 'f': if (isdigit (*p)) xcb_change_gc (c, gc, XCB_GC_FOREGROUND, (const uint32_t []){ pal[*p-'0'] }); p++; break; + case 'b': if (isdigit (*p)) xcb_change_gc (c, gc, XCB_GC_BACKGROUND, (const uint32_t []){ pal[*p-'0'] }); p++; break; + case 'l': align = 0; pos_x = 0; break; + case 'c': align = 1; pos_x = 0; break; + case 'r': align = 2; pos_x = 0; break; + } + q = parsed_text; + } + else *q++ = *p++; + + *q = 0; + } +} + +void +cleanup (void) +{ + xcb_destroy_window (c, win); + xcb_free_gc (c, gc); + xcb_disconnect (c); +} + +void +sighandle (int signal) +{ + if (signal == SIGINT || signal == SIGTERM) + exit (0); +} + +void +init (void) +{ + xcb_font_t xf; + xcb_screen_t *scr; + xcb_query_font_reply_t *ft_info; + + /* Connect to X */ + c = xcb_connect (NULL, NULL); + if (xcb_connection_has_error (c)) { + fprintf (stderr, "Couldn't connect to X\n"); + exit (1); + } + /* Grab infos from the first screen */ + scr = xcb_setup_roots_iterator (xcb_get_setup (c)).data; + bw = scr->width_in_pixels; + bh = BAR_HEIGHT; + root = scr->root; + /* Load the font */ + xf = xcb_generate_id (c); + if (xcb_request_check (c, xcb_open_font_checked (c, xf, strlen(BAR_FONT), BAR_FONT))) { + fprintf (stderr, "Couldn't load the font\n"); + exit (1); + } + /* Grab infos from the font */ + ft_info = xcb_query_font_reply (c, xcb_query_font (c, xf), NULL); + ft_height = ft_info->font_ascent + ft_info->font_descent; + ft_width = ft_info->max_bounds.character_width; + /* Create the main window */ + win = xcb_generate_id (c); + xcb_create_window (c, XCB_COPY_FROM_PARENT, win, root, 0, 0, bw, bh, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT, + scr->root_visual, XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT, + (const uint32_t []){ pal[0], 1 }); + /* Create the gc for drawing */ + gc = xcb_generate_id (c); + xcb_create_gc (c, gc, root, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT, + (const uint32_t []){ pal[1], pal[0], xf }); + /* Get rid of the font */ + xcb_close_font (c, xf); + /* Make the bar visible */ + xcb_map_window (c, win); + xcb_flush (c); +} + +int +main (void) +{ + struct pollfd stdinpoll = { .fd = 0, .events = POLLIN | POLLHUP }; + static char input[1000] = {0, }; + + atexit (cleanup); + signal (SIGINT, sighandle); + signal (SIGTERM, sighandle); + init (); + + for (;;) { + if (poll (&stdinpoll, 1, -1) > 0) { + if (stdinpoll.revents & POLLHUP) break; + if (stdinpoll.revents & POLLIN) { + fgets (input, sizeof(input), stdin); + parse (input); + xcb_flush (c); + } + } + } + + return 0; +} + diff --git a/config.h b/config.h new file mode 100644 index 0000000..f0e8ff4 --- /dev/null +++ b/config.h @@ -0,0 +1,13 @@ +#define BAR_HEIGHT 18 +#define BAR_FONT "-*-terminus-medium-r-normal-*-12-*-*-*-c-*-*-1" + +#define COLOR0 0x262729 /* background */ +#define COLOR1 0xebebeb /* foreground */ +#define COLOR2 0x262729 +#define COLOR3 0xf92671 +#define COLOR4 0xa6e22e +#define COLOR5 0xfd971f +#define COLOR6 0x34bdef +#define COLOR7 0x9e6ffe +#define COLOR8 0x5e7175 +#define COLOR9 0xccccc6