2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2011 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, …
18 #include <xcb/xproto.h>
19 #include <xcb/xcb_keysyms.h>
21 typedef struct Font i3Font;
24 * Data structure for cached font information:
25 * - font id in X11 (load it once)
26 * - font height (multiple calls needed to get it)
30 /** The xcb-id for the font */
33 /** Font information gathered from the server */
34 xcb_query_font_reply_t *info;
36 /** Font table for this font (may be NULL) */
37 xcb_charinfo_t *table;
39 /** The height of the font, built from font_ascent + font_descent */
43 /* Since this file also gets included by utilities which don’t use the i3 log
44 * infrastructure, we define a fallback. */
46 #define ELOG(fmt, ...) fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__)
50 * Try to get the socket path from X11 and return NULL if it doesn’t work.
52 * The memory for the socket path is dynamically allocated and has to be
53 * free()d by the caller.
56 char *socket_path_from_x11();
59 * Safe-wrapper around malloc which exits if malloc returns NULL (meaning that
60 * there is no more memory available)
63 void *smalloc(size_t size);
66 * Safe-wrapper around calloc which exits if malloc returns NULL (meaning that
67 * there is no more memory available)
70 void *scalloc(size_t size);
73 * Safe-wrapper around realloc which exits if realloc returns NULL (meaning
74 * that there is no more memory available).
77 void *srealloc(void *ptr, size_t size);
80 * Safe-wrapper around strdup which exits if malloc returns NULL (meaning that
81 * there is no more memory available)
84 char *sstrdup(const char *str);
87 * Safe-wrapper around asprintf which exits if it returns -1 (meaning that
88 * there is no more memory available)
91 int sasprintf(char **strp, const char *fmt, ...);
94 * Connects to the i3 IPC socket and returns the file descriptor for the
95 * socket. die()s if anything goes wrong.
98 int ipc_connect(const char *socket_path);
101 * Formats a message (payload) of the given size and type and sends it to i3 via
102 * the given socket file descriptor.
104 * Returns -1 when write() fails, errno will remain.
105 * Returns 0 on success.
108 int ipc_send_message(int sockfd, uint32_t message_size,
109 uint32_t message_type, const uint8_t *payload);
112 * Reads a message from the given socket file descriptor and stores its length
113 * (reply_length) as well as a pointer to its contents (reply).
115 * Returns -1 when read() fails, errno will remain.
116 * Returns -2 when the IPC protocol is violated (invalid magic, unexpected
117 * message type, EOF instead of a message). Additionally, the error will be
119 * Returns 0 on success.
122 int ipc_recv_message(int sockfd, uint32_t message_type,
123 uint32_t *reply_length, uint8_t **reply);
126 * Generates a configure_notify event and sends it to the given window
127 * Applications need this to think they’ve configured themselves correctly.
128 * The truth is, however, that we will manage them.
131 void fake_configure_notify(xcb_connection_t *conn, xcb_rectangle_t r, xcb_window_t window, int border_width);
134 * Returns the colorpixel to use for the given hex color (think of HTML). Only
135 * works for true-color (vast majority of cases) at the moment, avoiding a
138 * The hex_color has to start with #, for example #FF00FF.
140 * NOTE that get_colorpixel() does _NOT_ check the given color code for validity.
141 * This has to be done by the caller.
143 * NOTE that this function may in the future rely on a global xcb_connection_t
144 * variable called 'conn' to be present.
147 uint32_t get_colorpixel(const char *hex) __attribute__((const));
149 #if defined(__APPLE__)
153 * Returns a pointer to a new string which is a duplicate of the
154 * string, but only copies at most n characters.
157 char *strndup(const char *str, size_t n);
162 * All-in-one function which returns the modifier mask (XCB_MOD_MASK_*) for the
163 * given keysymbol, for example for XCB_NUM_LOCK (usually configured to mod2).
165 * This function initiates one round-trip. Use get_mod_mask_for() directly if
166 * you already have the modifier mapping and key symbols.
169 uint32_t aio_get_mod_mask_for(uint32_t keysym, xcb_key_symbols_t *symbols);
172 * Returns the modifier mask (XCB_MOD_MASK_*) for the given keysymbol, for
173 * example for XCB_NUM_LOCK (usually configured to mod2).
175 * This function does not initiate any round-trips.
178 uint32_t get_mod_mask_for(uint32_t keysym,
179 xcb_key_symbols_t *symbols,
180 xcb_get_modifier_mapping_reply_t *modmap_reply);
183 * Loads a font for usage, also getting its height. If fallback is true,
184 * the fonts 'fixed' or '-misc-*' will be loaded instead of exiting.
187 i3Font load_font(const char *pattern, const bool fallback);
190 * Defines the font to be used for the forthcoming calls.
193 void set_font(i3Font *font);
196 * Frees the resources taken by the current font.
202 * Converts the given string to UTF-8 from UCS-2 big endian. The return value
203 * must be freed after use.
206 char *convert_ucs2_to_utf8(xcb_char2b_t *text, size_t num_glyphs);
209 * Converts the given string to UCS-2 big endian for use with
210 * xcb_image_text_16(). The amount of real glyphs is stored in real_strlen,
211 * a buffer containing the UCS-2 encoded string (16 bit per glyph) is
212 * returned. It has to be freed when done.
215 xcb_char2b_t *convert_utf8_to_ucs2(char *input, size_t *real_strlen);
218 * Defines the colors to be used for the forthcoming draw_text calls.
221 void set_font_colors(xcb_gcontext_t gc, uint32_t foreground, uint32_t background);
224 * Draws text onto the specified X drawable (normally a pixmap) at the
225 * specified coordinates (from the top left corner of the leftmost, uppermost
226 * glyph) and using the provided gc. Text can be specified as UCS-2 or UTF-8.
229 void draw_text(char *text, size_t text_len, bool is_ucs2, xcb_drawable_t drawable,
230 xcb_gcontext_t gc, int x, int y, int max_width);
233 * Predict the text width in pixels for the given text. Text can be specified
237 int predict_text_width(char *text, size_t text_len, bool is_ucs2);