2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
7 * libi3: contains functions which are used by i3 *and* accompanying tools such
8 * as i3-msg, i3-config-wizard, …
19 #include <xcb/xproto.h>
20 #include <xcb/xcb_keysyms.h>
22 #include <pango/pango.h>
23 #include <cairo/cairo-xcb.h>
25 #define DEFAULT_DIR_MODE (S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH)
28 #define XCB_BUTTON_CLICK_LEFT XCB_BUTTON_INDEX_1
29 #define XCB_BUTTON_CLICK_MIDDLE XCB_BUTTON_INDEX_2
30 #define XCB_BUTTON_CLICK_RIGHT XCB_BUTTON_INDEX_3
31 #define XCB_BUTTON_SCROLL_UP XCB_BUTTON_INDEX_4
32 #define XCB_BUTTON_SCROLL_DOWN XCB_BUTTON_INDEX_5
33 /* xcb doesn't define constants for these. */
34 #define XCB_BUTTON_SCROLL_LEFT 6
35 #define XCB_BUTTON_SCROLL_RIGHT 7
39 * XCB connection and root screen
42 extern xcb_connection_t *conn;
43 extern xcb_screen_t *root_screen;
46 * Opaque data structure for storing strings.
49 typedef struct _i3String i3String;
51 typedef struct Font i3Font;
54 * Data structure for cached font information:
55 * - font id in X11 (load it once)
56 * - font height (multiple calls needed to get it)
60 /** The type of font */
67 /** The height of the font, built from font_ascent + font_descent */
70 /** The pattern/name used to load the font. */
75 /** The xcb-id for the font */
78 /** Font information gathered from the server */
79 xcb_query_font_reply_t *info;
81 /** Font table for this font (may be NULL) */
82 xcb_charinfo_t *table;
85 /** The pango font description */
86 PangoFontDescription *pango_desc;
90 /* Since this file also gets included by utilities which don’t use the i3 log
91 * infrastructure, we define a fallback. */
93 void verboselog(char *fmt, ...)
94 __attribute__((format(printf, 1, 2)));
95 #define LOG(fmt, ...) verboselog("[libi3] " __FILE__ " " fmt, ##__VA_ARGS__)
98 void errorlog(char *fmt, ...)
99 __attribute__((format(printf, 1, 2)));
100 #define ELOG(fmt, ...) errorlog("[libi3] ERROR: " fmt, ##__VA_ARGS__)
103 void debuglog(char *fmt, ...)
104 __attribute__((format(printf, 1, 2)));
105 #define DLOG(fmt, ...) debuglog("%s:%s:%d - " fmt, STRIPPED__FILE__, __FUNCTION__, __LINE__, ##__VA_ARGS__)
109 * Try to get the contents of the given atom (for example I3_SOCKET_PATH) from
110 * the X11 root window and return NULL if it doesn’t work.
112 * If the provided XCB connection is NULL, a new connection will be
115 * The memory for the contents is dynamically allocated and has to be
116 * free()d by the caller.
119 char *root_atom_contents(const char *atomname, xcb_connection_t *provided_conn, int screen);
122 * Safe-wrapper around malloc which exits if malloc returns NULL (meaning that
123 * there is no more memory available)
126 void *smalloc(size_t size);
129 * Safe-wrapper around calloc which exits if malloc returns NULL (meaning that
130 * there is no more memory available)
133 void *scalloc(size_t num, size_t size);
136 * Safe-wrapper around realloc which exits if realloc returns NULL (meaning
137 * that there is no more memory available).
140 void *srealloc(void *ptr, size_t size);
143 * Safe-wrapper around strdup which exits if malloc returns NULL (meaning that
144 * there is no more memory available)
147 char *sstrdup(const char *str);
150 * Safe-wrapper around strndup which exits if strndup returns NULL (meaning that
151 * there is no more memory available)
154 char *sstrndup(const char *str, size_t size);
157 * Safe-wrapper around asprintf which exits if it returns -1 (meaning that
158 * there is no more memory available)
161 int sasprintf(char **strp, const char *fmt, ...);
164 * Wrapper around correct write which returns -1 (meaning that
165 * write failed) or count (meaning that all bytes were written)
168 ssize_t writeall(int fd, const void *buf, size_t count);
171 * Safe-wrapper around writeall which exits if it returns -1 (meaning that
175 ssize_t swrite(int fd, const void *buf, size_t count);
178 * Build an i3String from an UTF-8 encoded string.
179 * Returns the newly-allocated i3String.
182 i3String *i3string_from_utf8(const char *from_utf8);
185 * Build an i3String from an UTF-8 encoded string in Pango markup.
188 i3String *i3string_from_markup(const char *from_markup);
191 * Build an i3String from an UTF-8 encoded string with fixed length.
192 * To be used when no proper NUL-terminaison is available.
193 * Returns the newly-allocated i3String.
196 i3String *i3string_from_utf8_with_length(const char *from_utf8, size_t num_bytes);
199 * Build an i3String from an UTF-8 encoded string in Pango markup with fixed
203 i3String *i3string_from_markup_with_length(const char *from_markup, size_t num_bytes);
206 * Build an i3String from an UCS-2 encoded string.
207 * Returns the newly-allocated i3String.
210 i3String *i3string_from_ucs2(const xcb_char2b_t *from_ucs2, size_t num_glyphs);
213 * Copies the given i3string.
214 * Note that this will not free the source string.
216 i3String *i3string_copy(i3String *str);
222 void i3string_free(i3String *str);
225 * Securely i3string_free by setting the pointer to NULL
226 * to prevent accidentally using freed memory.
229 #define I3STRING_FREE(str) \
232 i3string_free(str); \
238 * Returns the UTF-8 encoded version of the i3String.
241 const char *i3string_as_utf8(i3String *str);
244 * Returns the UCS-2 encoded version of the i3String.
247 const xcb_char2b_t *i3string_as_ucs2(i3String *str);
250 * Returns the number of bytes (UTF-8 encoded) in an i3String.
253 size_t i3string_get_num_bytes(i3String *str);
256 * Whether the given i3String is in Pango markup.
258 bool i3string_is_markup(i3String *str);
261 * Set whether the i3String should use Pango markup.
263 void i3string_set_markup(i3String *str, bool pango_markup);
266 * Escape pango markup characters in the given string.
268 i3String *i3string_escape_markup(i3String *str);
271 * Returns the number of glyphs in an i3String.
274 size_t i3string_get_num_glyphs(i3String *str);
277 * Connects to the i3 IPC socket and returns the file descriptor for the
278 * socket. die()s if anything goes wrong.
281 int ipc_connect(const char *socket_path);
284 * Formats a message (payload) of the given size and type and sends it to i3 via
285 * the given socket file descriptor.
287 * Returns -1 when write() fails, errno will remain.
288 * Returns 0 on success.
291 int ipc_send_message(int sockfd, const uint32_t message_size,
292 const uint32_t message_type, const uint8_t *payload);
295 * Reads a message from the given socket file descriptor and stores its length
296 * (reply_length) as well as a pointer to its contents (reply).
298 * Returns -1 when read() fails, errno will remain.
299 * Returns -2 when the IPC protocol is violated (invalid magic, unexpected
300 * message type, EOF instead of a message). Additionally, the error will be
302 * Returns 0 on success.
305 int ipc_recv_message(int sockfd, uint32_t *message_type,
306 uint32_t *reply_length, uint8_t **reply);
309 * Generates a configure_notify event and sends it to the given window
310 * Applications need this to think they’ve configured themselves correctly.
311 * The truth is, however, that we will manage them.
314 void fake_configure_notify(xcb_connection_t *conn, xcb_rectangle_t r, xcb_window_t window, int border_width);
317 * Returns the colorpixel to use for the given hex color (think of HTML). Only
318 * works for true-color (vast majority of cases) at the moment, avoiding a
321 * The hex_color has to start with #, for example #FF00FF.
323 * NOTE that get_colorpixel() does _NOT_ check the given color code for validity.
324 * This has to be done by the caller.
326 * NOTE that this function may in the future rely on a global xcb_connection_t
327 * variable called 'conn' to be present.
330 uint32_t get_colorpixel(const char *hex) __attribute__((const));
332 #if defined(__APPLE__)
336 * Returns a pointer to a new string which is a duplicate of the
337 * string, but only copies at most n characters.
340 char *strndup(const char *str, size_t n);
345 * All-in-one function which returns the modifier mask (XCB_MOD_MASK_*) for the
346 * given keysymbol, for example for XCB_NUM_LOCK (usually configured to mod2).
348 * This function initiates one round-trip. Use get_mod_mask_for() directly if
349 * you already have the modifier mapping and key symbols.
352 uint32_t aio_get_mod_mask_for(uint32_t keysym, xcb_key_symbols_t *symbols);
355 * Returns the modifier mask (XCB_MOD_MASK_*) for the given keysymbol, for
356 * example for XCB_NUM_LOCK (usually configured to mod2).
358 * This function does not initiate any round-trips.
361 uint32_t get_mod_mask_for(uint32_t keysym,
362 xcb_key_symbols_t *symbols,
363 xcb_get_modifier_mapping_reply_t *modmap_reply);
366 * Loads a font for usage, also getting its height. If fallback is true,
367 * the fonts 'fixed' or '-misc-*' will be loaded instead of exiting. If any
368 * font was previously loaded, it will be freed.
371 i3Font load_font(const char *pattern, const bool fallback);
374 * Defines the font to be used for the forthcoming calls.
377 void set_font(i3Font *font);
380 * Frees the resources taken by the current font. If no font was previously
381 * loaded, it simply returns.
384 void free_font(void);
387 * Converts the given string to UTF-8 from UCS-2 big endian. The return value
388 * must be freed after use.
391 char *convert_ucs2_to_utf8(xcb_char2b_t *text, size_t num_glyphs);
394 * Converts the given string to UCS-2 big endian for use with
395 * xcb_image_text_16(). The amount of real glyphs is stored in real_strlen,
396 * a buffer containing the UCS-2 encoded string (16 bit per glyph) is
397 * returned. It has to be freed when done.
400 xcb_char2b_t *convert_utf8_to_ucs2(char *input, size_t *real_strlen);
402 /* Represents a color split by color channel. */
403 typedef struct color_t {
409 /* The colorpixel we use for direct XCB calls. */
413 #define COLOR_TRANSPARENT ((color_t){.red = 0.0, .green = 0.0, .blue = 0.0, .colorpixel = 0})
416 * Defines the colors to be used for the forthcoming draw_text calls.
419 void set_font_colors(xcb_gcontext_t gc, color_t foreground, color_t background);
422 * Returns true if and only if the current font is a pango font.
425 bool font_is_pango(void);
428 * Draws text onto the specified X drawable (normally a pixmap) at the
429 * specified coordinates (from the top left corner of the leftmost, uppermost
430 * glyph) and using the provided gc.
432 * Text must be specified as an i3String.
435 void draw_text(i3String *text, xcb_drawable_t drawable, xcb_gcontext_t gc,
436 xcb_visualtype_t *visual, int x, int y, int max_width);
439 * ASCII version of draw_text to print static strings.
442 void draw_text_ascii(const char *text, xcb_drawable_t drawable,
443 xcb_gcontext_t gc, int x, int y, int max_width);
446 * Predict the text width in pixels for the given text. Text must be
447 * specified as an i3String.
450 int predict_text_width(i3String *text);
453 * Returns the visual type associated with the given screen.
456 xcb_visualtype_t *get_visualtype(xcb_screen_t *screen);
459 * Returns true if this version of i3 is a debug build (anything which is not a
460 * release version), based on the git version number.
463 bool is_debug_build() __attribute__((const));
466 * Returns the name of a temporary file with the specified prefix.
469 char *get_process_filename(const char *prefix);
472 * This function returns the absolute path to the executable it is running in.
474 * The implementation follows http://stackoverflow.com/a/933996/712014
476 * Returned value must be freed by the caller.
478 char *get_exe_path(const char *argv0);
481 * Initialize the DPI setting.
482 * This will use the 'Xft.dpi' X resource if available and fall back to
483 * guessing the correct value otherwise.
488 * This function returns the value of the DPI setting.
491 long get_dpi_value(void);
494 * Convert a logical amount of pixels (e.g. 2 pixels on a “standard” 96 DPI
495 * screen) to a corresponding amount of physical pixels on a standard or retina
496 * screen, e.g. 5 pixels on a 227 DPI MacBook Pro 13" Retina screen.
499 int logical_px(const int logical);
502 * This function resolves ~ in pathnames.
503 * It may resolve wildcards in the first part of the path, but if no match
504 * or multiple matches are found, it just returns a copy of path as given.
507 char *resolve_tilde(const char *path);
510 * Get the path of the first configuration file found. If override_configpath
511 * is specified, that path is returned and saved for further calls. Otherwise,
512 * checks the home directory first, then the system directory first, always
513 * taking into account the XDG Base Directory Specification ($XDG_CONFIG_HOME,
517 char *get_config_path(const char *override_configpath, bool use_system_paths);
521 * Emulates mkdir -p (creates any missing folders)
524 int mkdirp(const char *path, mode_t mode);
527 /** Helper structure for usage in format_placeholders(). */
528 typedef struct placeholder_t {
529 /* The placeholder to be replaced, e.g., "%title". */
531 /* The value this placeholder should be replaced with. */
536 * Replaces occurrences of the defined placeholders in the format string.
539 char *format_placeholders(char *format, placeholder_t *placeholders, int num);
541 /* We need to flush cairo surfaces twice to avoid an assertion bug. See #1989
542 * and https://bugs.freedesktop.org/show_bug.cgi?id=92455. */
543 #define CAIRO_SURFACE_FLUSH(surface) \
545 cairo_surface_flush(surface); \
546 cairo_surface_flush(surface); \
549 /* A wrapper grouping an XCB drawable and both a graphics context
550 * and the corresponding cairo objects representing it. */
551 typedef struct surface_t {
552 /* The drawable which is being represented. */
555 /* A classic XCB graphics context. */
558 xcb_visualtype_t *visual_type;
563 /* A cairo surface representing the drawable. */
564 cairo_surface_t *surface;
566 /* The cairo object representing the drawable. In general,
567 * this is what one should use for any drawing operation. */
572 * Initialize the surface to represent the given drawable.
575 void draw_util_surface_init(xcb_connection_t *conn, surface_t *surface, xcb_drawable_t drawable,
576 xcb_visualtype_t *visual, int width, int height);
579 * Resize the surface to the given size.
582 void draw_util_surface_set_size(surface_t *surface, int width, int height);
585 * Destroys the surface.
588 void draw_util_surface_free(xcb_connection_t *conn, surface_t *surface);
591 * Parses the given color in hex format to an internal color representation.
592 * Note that the input must begin with a hash sign, e.g., "#3fbc59".
595 color_t draw_util_hex_to_color(const char *color);
598 * Draw the given text using libi3.
599 * This function also marks the surface dirty which is needed if other means of
600 * drawing are used. This will be the case when using XCB to draw text.
603 void draw_util_text(i3String *text, surface_t *surface, color_t fg_color, color_t bg_color, int x, int y, int max_width);
606 * Draws a filled rectangle.
607 * This function is a convenience wrapper and takes care of flushing the
608 * surface as well as restoring the cairo state.
611 void draw_util_rectangle(surface_t *surface, color_t color, double x, double y, double w, double h);
614 * Clears a surface with the given color.
617 void draw_util_clear_surface(surface_t *surface, color_t color);
620 * Copies a surface onto another surface.
623 void draw_util_copy_surface(surface_t *src, surface_t *dest, double src_x, double src_y,
624 double dest_x, double dest_y, double width, double height);