/*
* vim:ts=4:sw=4:expandtab
+ *
+ * i3 - an improved dynamic tiling window manager
+ * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
+ *
+ * libi3: contains functions which are used by i3 *and* accompanying tools such
+ * as i3-msg, i3-config-wizard, …
+ *
*/
-
#ifndef _LIBI3_H
#define _LIBI3_H
+#include <stdbool.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <xcb/xcb.h>
+#include <xcb/xproto.h>
+#include <xcb/xcb_keysyms.h>
+
+#if PANGO_SUPPORT
+#include <pango/pango.h>
+#endif
+
+/**
+ * Opaque data structure for storing strings.
+ *
+ */
+typedef struct _i3String i3String;
+
+typedef struct Font i3Font;
+
/**
- * Try to get the socket path from X11 and return NULL if it doesn’t work.
+ * Data structure for cached font information:
+ * - font id in X11 (load it once)
+ * - font height (multiple calls needed to get it)
*
- * The memory for the socket path is dynamically allocated and has to be
+ */
+struct Font {
+ /** The type of font */
+ enum {
+ FONT_TYPE_NONE = 0,
+ FONT_TYPE_XCB,
+ FONT_TYPE_PANGO
+ } type;
+
+ /** The height of the font, built from font_ascent + font_descent */
+ int height;
+
+ union {
+ struct {
+ /** The xcb-id for the font */
+ xcb_font_t id;
+
+ /** Font information gathered from the server */
+ xcb_query_font_reply_t *info;
+
+ /** Font table for this font (may be NULL) */
+ xcb_charinfo_t *table;
+ } xcb;
+
+#if PANGO_SUPPORT
+ /** The pango font description */
+ PangoFontDescription *pango_desc;
+#endif
+ } specific;
+};
+
+/* Since this file also gets included by utilities which don’t use the i3 log
+ * infrastructure, we define a fallback. */
+#if !defined(LOG)
+void verboselog(char *fmt, ...);
+#define LOG(fmt, ...) verboselog("[libi3] " __FILE__ " " fmt, ##__VA_ARGS__)
+#endif
+#if !defined(ELOG)
+void errorlog(char *fmt, ...);
+#define ELOG(fmt, ...) errorlog("[libi3] ERROR: " fmt, ##__VA_ARGS__)
+#endif
+
+/**
+ * Try to get the contents of the given atom (for example I3_SOCKET_PATH) from
+ * the X11 root window and return NULL if it doesn’t work.
+ *
+ * The memory for the contents is dynamically allocated and has to be
* free()d by the caller.
*
*/
-char *socket_path_from_x11();
+char *root_atom_contents(const char *atomname);
/**
* Safe-wrapper around malloc which exits if malloc returns NULL (meaning that
*/
char *sstrdup(const char *str);
+/**
+ * Safe-wrapper around asprintf which exits if it returns -1 (meaning that
+ * there is no more memory available)
+ *
+ */
+int sasprintf(char **strp, const char *fmt, ...);
+
+/**
+ * Build an i3String from an UTF-8 encoded string.
+ * Returns the newly-allocated i3String.
+ *
+ */
+i3String *i3string_from_utf8(const char *from_utf8);
+
+/**
+ * Build an i3String from an UTF-8 encoded string with fixed length.
+ * To be used when no proper NUL-terminaison is available.
+ * Returns the newly-allocated i3String.
+ *
+ */
+i3String *i3string_from_utf8_with_length(const char *from_utf8, size_t num_bytes);
+
+/**
+ * Build an i3String from an UCS-2 encoded string.
+ * Returns the newly-allocated i3String.
+ *
+ */
+i3String *i3string_from_ucs2(const xcb_char2b_t *from_ucs2, size_t num_glyphs);
+
+/**
+ * Free an i3String.
+ *
+ */
+void i3string_free(i3String *str);
+
+/**
+ * Securely i3string_free by setting the pointer to NULL
+ * to prevent accidentally using freed memory.
+ *
+ */
+#define I3STRING_FREE(str) \
+do { \
+ if (str != NULL) { \
+ i3string_free(str); \
+ str = NULL; \
+ } \
+} while (0)
+
+/**
+ * Returns the UTF-8 encoded version of the i3String.
+ *
+ */
+const char *i3string_as_utf8(i3String *str);
+
+/**
+ * Returns the UCS-2 encoded version of the i3String.
+ *
+ */
+const xcb_char2b_t *i3string_as_ucs2(i3String *str);
+
+/**
+ * Returns the number of bytes (UTF-8 encoded) in an i3String.
+ *
+ */
+size_t i3string_get_num_bytes(i3String *str);
+
+/**
+ * Returns the number of glyphs in an i3String.
+ *
+ */
+size_t i3string_get_num_glyphs(i3String *str);
+
+/**
+ * Connects to the i3 IPC socket and returns the file descriptor for the
+ * socket. die()s if anything goes wrong.
+ *
+ */
+int ipc_connect(const char *socket_path);
+
+/**
+ * Formats a message (payload) of the given size and type and sends it to i3 via
+ * the given socket file descriptor.
+ *
+ * Returns -1 when write() fails, errno will remain.
+ * Returns 0 on success.
+ *
+ */
+int ipc_send_message(int sockfd, uint32_t message_size,
+ uint32_t message_type, const uint8_t *payload);
+
+/**
+ * Reads a message from the given socket file descriptor and stores its length
+ * (reply_length) as well as a pointer to its contents (reply).
+ *
+ * Returns -1 when read() fails, errno will remain.
+ * Returns -2 when the IPC protocol is violated (invalid magic, unexpected
+ * message type, EOF instead of a message). Additionally, the error will be
+ * printed to stderr.
+ * Returns 0 on success.
+ *
+ */
+int ipc_recv_message(int sockfd, uint32_t message_type,
+ uint32_t *reply_length, uint8_t **reply);
+
+/**
+ * Generates a configure_notify event and sends it to the given window
+ * Applications need this to think they’ve configured themselves correctly.
+ * The truth is, however, that we will manage them.
+ *
+ */
+void fake_configure_notify(xcb_connection_t *conn, xcb_rectangle_t r, xcb_window_t window, int border_width);
+
+/**
+ * Returns the colorpixel to use for the given hex color (think of HTML). Only
+ * works for true-color (vast majority of cases) at the moment, avoiding a
+ * roundtrip to X11.
+ *
+ * The hex_color has to start with #, for example #FF00FF.
+ *
+ * NOTE that get_colorpixel() does _NOT_ check the given color code for validity.
+ * This has to be done by the caller.
+ *
+ * NOTE that this function may in the future rely on a global xcb_connection_t
+ * variable called 'conn' to be present.
+ *
+ */
+uint32_t get_colorpixel(const char *hex) __attribute__((const));
+
+#if defined(__APPLE__)
+
+/*
+ * Taken from FreeBSD
+ * Returns a pointer to a new string which is a duplicate of the
+ * string, but only copies at most n characters.
+ *
+ */
+char *strndup(const char *str, size_t n);
+
+#endif
+
+/**
+ * All-in-one function which returns the modifier mask (XCB_MOD_MASK_*) for the
+ * given keysymbol, for example for XCB_NUM_LOCK (usually configured to mod2).
+ *
+ * This function initiates one round-trip. Use get_mod_mask_for() directly if
+ * you already have the modifier mapping and key symbols.
+ *
+ */
+uint32_t aio_get_mod_mask_for(uint32_t keysym, xcb_key_symbols_t *symbols);
+
+/**
+ * Returns the modifier mask (XCB_MOD_MASK_*) for the given keysymbol, for
+ * example for XCB_NUM_LOCK (usually configured to mod2).
+ *
+ * This function does not initiate any round-trips.
+ *
+ */
+uint32_t get_mod_mask_for(uint32_t keysym,
+ xcb_key_symbols_t *symbols,
+ xcb_get_modifier_mapping_reply_t *modmap_reply);
+
+/**
+ * Loads a font for usage, also getting its height. If fallback is true,
+ * the fonts 'fixed' or '-misc-*' will be loaded instead of exiting.
+ *
+ */
+i3Font load_font(const char *pattern, const bool fallback);
+
+/**
+ * Defines the font to be used for the forthcoming calls.
+ *
+ */
+void set_font(i3Font *font);
+
+/**
+ * Frees the resources taken by the current font.
+ *
+ */
+void free_font(void);
+
+/**
+ * Converts the given string to UTF-8 from UCS-2 big endian. The return value
+ * must be freed after use.
+ *
+ */
+char *convert_ucs2_to_utf8(xcb_char2b_t *text, size_t num_glyphs);
+
+/**
+ * Converts the given string to UCS-2 big endian for use with
+ * xcb_image_text_16(). The amount of real glyphs is stored in real_strlen,
+ * a buffer containing the UCS-2 encoded string (16 bit per glyph) is
+ * returned. It has to be freed when done.
+ *
+ */
+xcb_char2b_t *convert_utf8_to_ucs2(char *input, size_t *real_strlen);
+
+/**
+ * Defines the colors to be used for the forthcoming draw_text calls.
+ *
+ */
+void set_font_colors(xcb_gcontext_t gc, uint32_t foreground, uint32_t background);
+
+/**
+ * Draws text onto the specified X drawable (normally a pixmap) at the
+ * specified coordinates (from the top left corner of the leftmost, uppermost
+ * glyph) and using the provided gc.
+ *
+ * Text must be specified as an i3String.
+ *
+ */
+void draw_text(i3String *text, xcb_drawable_t drawable,
+ xcb_gcontext_t gc, int x, int y, int max_width);
+
+/**
+ * ASCII version of draw_text to print static strings.
+ *
+ */
+void draw_text_ascii(const char *text, xcb_drawable_t drawable,
+ xcb_gcontext_t gc, int x, int y, int max_width);
+
+/**
+ * Predict the text width in pixels for the given text. Text must be
+ * specified as an i3String.
+ *
+ */
+int predict_text_width(i3String *text);
+
+/**
+ * Returns the visual type associated with the given screen.
+ *
+ */
+xcb_visualtype_t *get_visualtype(xcb_screen_t *screen);
+
+/**
+ * Returns true if this version of i3 is a debug build (anything which is not a
+ * release version), based on the git version number.
+ *
+ */
+bool is_debug_build() __attribute__((const));
+
#endif
projects / i3 / i3 / blobdiff