Make liberty-xui load PNG program icons
X11 applications now have a dependency on libpng. This makes use of a new related liberty-xdg module, which can be used separately.
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766
liberty-xdg.c
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766
liberty-xdg.c
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@ -0,0 +1,766 @@
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/*
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* liberty-xdg.c: the ultimate C unlibrary: freedesktop.org specifications
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*
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* Copyright (c) 2023 - 2024, Přemysl Eric Janouch <p@janouch.name>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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// This files assumes you've already included liberty.c.
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#ifdef LIBERTY_XDG_WANT_X11
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#include <X11/Xatom.h>
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#include <X11/Xlib.h>
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#include <png.h>
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#endif // LIBERTY_XDG_WANT_X11
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// --- XSettings ---------------------------------------------------------------
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#ifdef LIBERTY_XDG_WANT_X11
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struct xdg_xsettings_setting
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{
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enum xdg_xsettings_type
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{
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XDG_XSETTINGS_INTEGER,
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XDG_XSETTINGS_STRING,
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XDG_XSETTINGS_COLOR,
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}
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type; ///< What's stored in the union
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uint32_t serial; ///< Serial of the last change
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union
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{
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int32_t integer;
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struct str string;
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struct { uint16_t red, green, blue, alpha; } color;
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};
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};
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static void
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xdg_xsettings_setting_destroy (struct xdg_xsettings_setting *self)
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{
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if (self->type == XDG_XSETTINGS_STRING)
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str_free (&self->string);
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free (self);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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struct xdg_xsettings
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{
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struct str_map settings; ///< Name -> xdg_xsettings_setting
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};
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static void
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xdg_xsettings_free (struct xdg_xsettings *self)
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{
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str_map_free (&self->settings);
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}
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static struct xdg_xsettings
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xdg_xsettings_make (void)
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{
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return (struct xdg_xsettings)
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{
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.settings =
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str_map_make ((str_map_free_fn) xdg_xsettings_setting_destroy),
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};
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}
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static void
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xdg_xsettings_update (struct xdg_xsettings *self, Display *dpy)
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{
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// TODO: We're supposed to lock the server.
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// TODO: We're supposed to trap X errors.
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char *selection = xstrdup_printf ("_XSETTINGS_S%d", DefaultScreen (dpy));
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Window owner
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= XGetSelectionOwner (dpy, XInternAtom (dpy, selection, True));
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free (selection);
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if (!owner)
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return;
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Atom actual_type = None;
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int actual_format = 0;
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unsigned long nitems = 0, bytes_after = 0;
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unsigned char *buffer = NULL;
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Atom xsettings = XInternAtom (dpy, "_XSETTINGS_SETTINGS", True);
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int status = XGetWindowProperty (dpy,
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owner,
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xsettings,
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0L,
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LONG_MAX,
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False,
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xsettings,
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&actual_type,
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&actual_format,
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&nitems,
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&bytes_after,
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&buffer);
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if (status != Success || !buffer)
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return;
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if (actual_type != xsettings
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|| actual_format != 8
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|| nitems < 12)
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goto fail;
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const struct peeker *peeker = NULL;
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if (buffer[0] == LSBFirst)
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peeker = &peeker_le;
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else if (buffer[0] == MSBFirst)
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peeker = &peeker_be;
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else
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goto fail;
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// We're ignoring the serial for now.
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uint32_t n_settings = peeker->u32 (buffer + 8);
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size_t offset = 12;
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struct str name = str_make ();
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struct xdg_xsettings_setting *setting = xcalloc (1, sizeof *setting);
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while (n_settings--)
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{
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if (nitems < offset + 4)
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goto fail_item;
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setting->type = buffer[offset];
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uint16_t name_len = peeker->u16 (buffer + offset + 2);
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offset += 4;
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if (nitems < offset + name_len)
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goto fail_item;
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str_append_data (&name, buffer + offset, name_len);
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offset += ((name_len + 3) & ~3);
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if (nitems < offset + 4)
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goto fail_item;
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setting->serial = peeker->u32 (buffer + offset);
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offset += 4;
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switch (setting->type)
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{
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case XDG_XSETTINGS_INTEGER:
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if (nitems < offset + 4)
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goto fail_item;
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setting->integer = (int32_t) peeker->u32 (buffer + offset);
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offset += 4;
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break;
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case XDG_XSETTINGS_STRING:
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{
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if (nitems < offset + 4)
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goto fail_item;
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uint32_t value_len = peeker->u32 (buffer + offset);
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offset += 4;
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if (nitems < offset + value_len)
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goto fail_item;
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setting->string = str_make ();
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str_append_data (&setting->string, buffer + offset, value_len);
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offset += ((value_len + 3) & ~3);
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break;
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}
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case XDG_XSETTINGS_COLOR:
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if (nitems < offset + 8)
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goto fail_item;
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setting->color.red = peeker->u16 (buffer + offset);
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setting->color.green = peeker->u16 (buffer + offset + 2);
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setting->color.blue = peeker->u16 (buffer + offset + 4);
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setting->color.alpha = peeker->u16 (buffer + offset + 6);
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offset += 8;
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break;
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default:
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goto fail_item;
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}
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// TODO(p): Change detection, by comparing existence and serials.
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str_map_set (&self->settings, name.str, setting);
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setting = xcalloc (1, sizeof *setting);
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str_reset (&name);
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}
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fail_item:
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xdg_xsettings_setting_destroy (setting);
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str_free (&name);
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fail:
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XFree (buffer);
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}
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#endif // LIBERTY_XDG_WANT_X11
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// --- Desktop file parser -----------------------------------------------------
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// Useful for parsing desktop-file-spec, icon-theme-spec, trash-spec,
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// mime-apps-spec. This code is not designed for making changes to the files.
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struct desktop_file
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{
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struct str_map groups; ///< Group name → Key → Value
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};
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static void
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desktop_file_free_group (void *value)
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{
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str_map_free (value);
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free (value);
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}
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static void
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desktop_file_free (struct desktop_file *self)
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{
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str_map_free (&self->groups);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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static void
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desktop_file_parse_line (struct desktop_file *self,
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char **group_name, const char *line, const char *end)
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{
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struct str_map *group = NULL;
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if (*group_name)
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group = str_map_find (&self->groups, *group_name);
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if (*line == '[')
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{
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bool ok = *--end == ']';
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for (const char *p = ++line; ok && p != end; p++)
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ok = (unsigned char) *p >= 32 && (unsigned char) *p <= 127
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&& *p != '[' && *p != ']';
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if (!ok)
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{
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cstr_set (group_name, NULL);
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print_debug ("invalid desktop file group header");
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return;
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}
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cstr_set (group_name, xstrndup (line, end - line));
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if (str_map_find (&self->groups, *group_name))
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{
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print_debug ("duplicate desktop file group: %s", *group_name);
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return;
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}
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group = xcalloc (1, sizeof *group);
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*group = str_map_make (free);
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str_map_set (&self->groups, *group_name, group);
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return;
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}
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if (!group)
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{
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print_debug ("unexpected desktop file entry outside of a group");
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return;
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}
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const char *key_end = line;
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while (key_end != end && (isalnum_ascii (*key_end) || *key_end == '-'))
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key_end++;
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// We could validate these further, but we just search in them anyway.
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if (key_end != end && *key_end == '[')
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{
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while (++key_end != end && *key_end != ']')
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;
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if (key_end != end && *key_end == ']')
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key_end++;
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}
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const char *value = key_end;
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while (value != end && *value == ' ')
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value++;
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if (value == end || *value++ != '=')
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{
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print_debug ("invalid desktop file entry");
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return;
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}
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while (value != end && *value == ' ')
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value++;
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char *key = xstrndup (line, key_end - line);
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if (str_map_find (group, key))
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print_debug ("duplicate desktop file entry for: %s", key);
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else
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str_map_set (group, key, xstrndup (value, end - value));
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free (key);
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}
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static struct desktop_file
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desktop_file_make (const char *data, size_t len)
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{
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struct desktop_file self = (struct desktop_file)
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{ .groups = str_map_make (desktop_file_free_group) };
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char *group_name = NULL;
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const char *p = data, *data_end = p + len;
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while (p != data_end)
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{
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const char *line = p, *line_end = line;
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while (line_end != data_end && *line_end != '\n')
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line_end++;
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if ((p = line_end) != data_end && *p == '\n')
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p++;
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if (line != line_end && *line != '#')
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desktop_file_parse_line (&self, &group_name, line, line_end);
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}
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free (group_name);
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return self;
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}
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static const char *
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desktop_file_get (struct desktop_file *self, const char *group, const char *key)
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{
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// TODO(p): Ideally, also implement localised keys.
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struct str_map *group_map = str_map_find (&self->groups, group);
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if (!group_map)
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return NULL;
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return str_map_find (group_map, key);
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}
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static struct strv
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desktop_file_unescape (const char *value, bool is_list)
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{
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struct strv result = strv_make ();
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struct str s = str_make ();
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// XXX: The unescaping behaviour is underspecified.
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// It might make sense to warn about unrecognised escape sequences.
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bool escape = false;
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for (const char *p = value; *p; p++)
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{
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if (escape)
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{
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switch (*p)
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{
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break; case 's': str_append_c (&s, ' ');
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break; case 'n': str_append_c (&s, '\n');
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break; case 't': str_append_c (&s, '\t');
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break; case 'r': str_append_c (&s, '\r');
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break; default: str_append_c (&s, *p);
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}
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}
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else if (*p == '\\' && p[1])
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escape = true;
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else if (*p == ';' && is_list)
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{
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strv_append_owned (&result, str_steal (&s));
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s = str_make ();
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}
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else
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str_append_c (&s, *p);
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}
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if (!is_list || s.len != 0)
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strv_append_owned (&result, str_steal (&s));
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else
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str_free (&s);
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return result;
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}
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static char *
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desktop_file_get_string (struct desktop_file *self,
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const char *group, const char *key)
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{
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const char *value = desktop_file_get (self, group, key);
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if (!value)
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return NULL;
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struct strv values = desktop_file_unescape (value, false /* is_list */);
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char *unescaped = strv_steal (&values, 0);
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strv_free (&values);
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return unescaped;
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}
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static struct strv
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desktop_file_get_stringv (struct desktop_file *self,
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const char *group, const char *key)
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{
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const char *value = desktop_file_get (self, group, key);
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if (!value)
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return strv_make ();
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return desktop_file_unescape (value, true /* is_list */);
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}
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static bool
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desktop_file_get_bool (struct desktop_file *self,
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const char *group, const char *key)
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{
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const char *value = desktop_file_get (self, group, key);
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if (!value)
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return false;
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// Let's be compatible with pre-1.0 files when it costs us so little.
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if (!strcmp (value, "true")
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|| !strcmp (value, "1"))
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return true;
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if (!strcmp (value, "false")
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|| !strcmp (value, "0"))
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return false;
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print_debug ("invalid desktop file boolean for '%s': %s", key, value);
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return false;
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}
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// Nothing uses the "numeric" type.
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// "icon-theme-spec" uses "integer" and doesn't say what it is.
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static long
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desktop_file_get_integer (struct desktop_file *self,
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const char *group, const char *key)
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{
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const char *value = desktop_file_get (self, group, key);
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if (!value)
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return 0;
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char *end = NULL;
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long parsed = (errno = 0, strtol (value, &end, 10));
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if (errno != 0 || *end)
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print_debug ("invalid desktop file integer for '%s': %s", key, value);
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return parsed;
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}
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// --- Icon themes -------------------------------------------------------------
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// This implements part of the Icon Theme Specification.
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struct icon_theme_icon
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{
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uint32_t width; ///< Width of argb in pixels
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uint32_t height; ///< Height of argb in pixels
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uint32_t argb[]; ///< ARGB32 data, unassociated alpha
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};
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static void
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icon_theme_open_on_error (png_structp pngp, const char *error)
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{
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print_debug ("%s: %s", (const char *) png_get_error_ptr (pngp), error);
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png_longjmp (pngp, 1);
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}
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static void
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icon_theme_open_on_warning (png_structp pngp, const char *warning)
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{
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(void) pngp;
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(void) warning;
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// Fuck your "gamma value does not match libpng estimate".
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}
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// For simplicity, only support PNG icons, using the most popular library.
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static struct icon_theme_icon *
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icon_theme_open (const char *path)
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{
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volatile png_bytep buffer = NULL;
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volatile png_bytepp row_pointers = NULL;
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volatile struct icon_theme_icon *result = NULL;
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FILE *fp = fopen (path, "rb");
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if (!fp)
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{
|
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if (errno != ENOENT)
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print_debug ("%s: %s", path, strerror (errno));
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return NULL;
|
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}
|
||||
|
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// The simplified and high-level APIs aren't powerful enough.
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png_structp pngp = png_create_read_struct (PNG_LIBPNG_VER_STRING,
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(png_voidp) path, icon_theme_open_on_error, icon_theme_open_on_warning);
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png_infop infop = png_create_info_struct (pngp);
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if (!infop)
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{
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print_debug ("%s: %s", path, strerror (errno));
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goto fail;
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}
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if (setjmp (png_jmpbuf (pngp)))
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goto fail;
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|
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png_init_io (pngp, fp);
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png_read_info (pngp, infop);
|
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|
||||
// Asking for at least 8-bit channels. This call is a superset of:
|
||||
// - png_set_palette_to_rgb(),
|
||||
// - png_set_tRNS_to_alpha(),
|
||||
// - png_set_expand_gray_1_2_4_to_8().
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png_set_expand (pngp);
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// Reduce the possibilities further to RGB or RGBA...
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||||
png_set_gray_to_rgb (pngp);
|
||||
|
||||
// ...and /exactly/ 8-bit channels.
|
||||
// Alternatively, use png_set_expand_16() above to obtain 16-bit channels.
|
||||
png_set_scale_16 (pngp);
|
||||
|
||||
// PNG uses RGBA order, let's change that to ARGB (both in memory order).
|
||||
// This doesn't change a row's `color_type` in png_do_read_filler(),
|
||||
// and the following transformation thus ignores it.
|
||||
png_set_add_alpha (pngp, 0xFFFF, PNG_FILLER_BEFORE);
|
||||
png_set_swap_alpha (pngp);
|
||||
|
||||
(void) png_set_interlace_handling (pngp);
|
||||
|
||||
png_read_update_info (pngp, infop);
|
||||
if (png_get_bit_depth (pngp, infop) != 8
|
||||
|| png_get_channels (pngp, infop) != 4
|
||||
|| png_get_color_type (pngp, infop) != PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
png_error (pngp, "result not A8R8G8B8");
|
||||
|
||||
size_t row_bytes = png_get_rowbytes (pngp, infop);
|
||||
size_t height = png_get_image_height (pngp, infop);
|
||||
buffer = xcalloc (row_bytes, height);
|
||||
row_pointers = xcalloc (height, sizeof buffer);
|
||||
for (size_t y = 0; y < height; y++)
|
||||
row_pointers[y] = buffer + y * row_bytes;
|
||||
|
||||
png_read_image (pngp, row_pointers);
|
||||
|
||||
result = xcalloc (1, sizeof *result + row_bytes * height);
|
||||
result->width = png_get_image_width (pngp, infop);
|
||||
result->height = height;
|
||||
|
||||
uint32_t *dst = (uint32_t *) result->argb, *src = (uint32_t *) buffer;
|
||||
for (size_t pixels = result->width * result->height; pixels--; )
|
||||
*dst++ = ntohl (*src++);
|
||||
|
||||
fail:
|
||||
free (buffer);
|
||||
free (row_pointers);
|
||||
png_destroy_read_struct (&pngp, &infop, NULL);
|
||||
fclose (fp);
|
||||
return (struct icon_theme_icon *) result;
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
|
||||
struct icon_theme_find_context
|
||||
{
|
||||
struct strv base; ///< Base directories
|
||||
struct str_map visited; ///< Cycle prevention
|
||||
|
||||
ARRAY (struct icon_theme_icon *, icons)
|
||||
};
|
||||
|
||||
static void
|
||||
icon_theme_find__fallback (struct icon_theme_find_context *ctx,
|
||||
const char *name)
|
||||
{
|
||||
for (size_t i = 0; i < ctx->base.len; i++)
|
||||
{
|
||||
char *path = xstrdup_printf ("%s/%s.png", ctx->base.vector[i], name);
|
||||
struct icon_theme_icon *icon = icon_theme_open (path);
|
||||
free (path);
|
||||
if (icon)
|
||||
{
|
||||
ARRAY_RESERVE (ctx->icons, 1);
|
||||
ctx->icons[ctx->icons_len++] = icon;
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static struct desktop_file
|
||||
icon_theme_find__index (struct icon_theme_find_context *ctx, const char *theme)
|
||||
{
|
||||
struct str data = str_make ();
|
||||
for (size_t i = 0; i < ctx->base.len; i++)
|
||||
{
|
||||
struct error *e = NULL;
|
||||
char *path = xstrdup_printf ("%s/%s/index.theme",
|
||||
ctx->base.vector[i], theme);
|
||||
read_file (path, &data, &e);
|
||||
free (path);
|
||||
if (!e)
|
||||
break;
|
||||
|
||||
if (errno != ENOENT)
|
||||
print_debug ("%s", e->message);
|
||||
error_free (e);
|
||||
}
|
||||
|
||||
struct desktop_file index = desktop_file_make (data.str, data.len);
|
||||
str_free (&data);
|
||||
return index;
|
||||
}
|
||||
|
||||
static void
|
||||
icon_theme_find__named (struct icon_theme_find_context *ctx,
|
||||
const char *theme, const char *name)
|
||||
{
|
||||
// Either a cycle, or a common ancestor of inherited themes, which is valid.
|
||||
if (str_map_find (&ctx->visited, theme))
|
||||
return;
|
||||
|
||||
str_map_set (&ctx->visited, theme, (void *) (intptr_t) 1);
|
||||
struct desktop_file index = icon_theme_find__index (ctx, theme);
|
||||
|
||||
char *directories =
|
||||
desktop_file_get_string (&index, "Icon Theme", "Directories");
|
||||
if (!directories)
|
||||
goto out;
|
||||
|
||||
// NOTE: The sizes are not deduplicated, and priorities are uncertain.
|
||||
struct strv dirs = strv_make ();
|
||||
cstr_split (directories, ",", true, &dirs);
|
||||
free (directories);
|
||||
for (size_t d = 0; d < dirs.len; d++)
|
||||
{
|
||||
// The hicolor icon theme stuffs everything in Directories.
|
||||
if (desktop_file_get (&index, dirs.vector[d], "Scale")
|
||||
&& desktop_file_get_integer (&index, dirs.vector[d], "Scale") != 1)
|
||||
continue;
|
||||
|
||||
for (size_t i = 0; i < ctx->base.len; i++)
|
||||
{
|
||||
char *path = xstrdup_printf ("%s/%s/%s/%s.png",
|
||||
ctx->base.vector[i], theme, dirs.vector[d], name);
|
||||
struct icon_theme_icon *icon = icon_theme_open (path);
|
||||
free (path);
|
||||
if (icon)
|
||||
{
|
||||
ARRAY_RESERVE (ctx->icons, 1);
|
||||
ctx->icons[ctx->icons_len++] = icon;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
strv_free (&dirs);
|
||||
if (ctx->icons_len)
|
||||
goto out;
|
||||
|
||||
char *inherits =
|
||||
desktop_file_get_string (&index, "Icon Theme", "Inherits");
|
||||
if (inherits)
|
||||
{
|
||||
struct strv parents = strv_make ();
|
||||
cstr_split (inherits, ",", true, &parents);
|
||||
free (inherits);
|
||||
for (size_t i = 0; i < parents.len; i++)
|
||||
{
|
||||
icon_theme_find__named (ctx, parents.vector[i], name);
|
||||
if (ctx->icons_len)
|
||||
break;
|
||||
}
|
||||
strv_free (&parents);
|
||||
}
|
||||
|
||||
out:
|
||||
desktop_file_free (&index);
|
||||
}
|
||||
|
||||
/// Return all base directories appropriate for icon search.
|
||||
static struct strv
|
||||
icon_theme_get_base_directories (void)
|
||||
{
|
||||
struct strv dirs = strv_make ();
|
||||
struct str icons = str_make ();
|
||||
(void) str_append_env_path (&icons, "HOME", false);
|
||||
str_append (&icons, "/.icons");
|
||||
strv_append_owned (&dirs, str_steal (&icons));
|
||||
|
||||
// Note that we use XDG_CONFIG_HOME as well, which might be intended.
|
||||
struct strv xdg = strv_make ();
|
||||
get_xdg_data_dirs (&xdg);
|
||||
for (size_t i = 0; i < xdg.len; i++)
|
||||
strv_append_owned (&dirs, xstrdup_printf ("%s/icons", xdg.vector[i]));
|
||||
strv_free (&xdg);
|
||||
|
||||
strv_append (&dirs, "/usr/share/pixmaps");
|
||||
return dirs;
|
||||
}
|
||||
|
||||
static int
|
||||
icon_theme_find__compare (const void *a, const void *b)
|
||||
{
|
||||
const struct icon_theme_icon **ia = (const struct icon_theme_icon **) a;
|
||||
const struct icon_theme_icon **ib = (const struct icon_theme_icon **) b;
|
||||
double pa = (double) (*ia)->width * (*ia)->height;
|
||||
double pb = (double) (*ib)->width * (*ib)->height;
|
||||
return (pa > pb) - (pa < pb);
|
||||
}
|
||||
|
||||
/// Return all sizes of the named icon. When the theme name is not NULL,
|
||||
/// use it as the preferred theme. Always consult fallbacks locations.
|
||||
/// Ignore icon scales other than 1.
|
||||
static struct icon_theme_icon **
|
||||
icon_theme_find (const char *theme, const char *name, size_t *len)
|
||||
{
|
||||
struct icon_theme_find_context ctx = {};
|
||||
ctx.base = icon_theme_get_base_directories ();
|
||||
ctx.visited = str_map_make (NULL);
|
||||
ARRAY_INIT (ctx.icons);
|
||||
|
||||
if (theme)
|
||||
icon_theme_find__named (&ctx, theme, name);
|
||||
if (!ctx.icons_len)
|
||||
icon_theme_find__named (&ctx, "hicolor", name);
|
||||
if (!ctx.icons_len)
|
||||
icon_theme_find__fallback (&ctx, name);
|
||||
|
||||
strv_free (&ctx.base);
|
||||
str_map_free (&ctx.visited);
|
||||
|
||||
ARRAY_RESERVE (ctx.icons, 1);
|
||||
ctx.icons[ctx.icons_len] = NULL;
|
||||
if (!ctx.icons_len)
|
||||
{
|
||||
free (ctx.icons);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
qsort (ctx.icons,
|
||||
ctx.icons_len, sizeof *ctx.icons, icon_theme_find__compare);
|
||||
*len = ctx.icons_len;
|
||||
return ctx.icons;
|
||||
}
|
||||
|
||||
static void
|
||||
icon_theme_free (struct icon_theme_icon **icons)
|
||||
{
|
||||
for (struct icon_theme_icon **p = icons; *p; p++)
|
||||
free (*p);
|
||||
free (icons);
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
|
||||
#ifdef LIBERTY_XDG_WANT_X11
|
||||
|
||||
static void
|
||||
icon_theme_set_window_icon (Display *dpy,
|
||||
Window window, const char *theme, const char *name)
|
||||
{
|
||||
size_t icons_len = 0;
|
||||
struct icon_theme_icon **icons = icon_theme_find (theme, name, &icons_len);
|
||||
if (!icons)
|
||||
return;
|
||||
|
||||
size_t n = 0;
|
||||
for (size_t i = 0; i < icons_len; i++)
|
||||
n += 2 + icons[i]->width * icons[i]->height;
|
||||
|
||||
unsigned long *data = xcalloc (n, sizeof *data), *p = data;
|
||||
for (size_t i = 0; i < icons_len; i++)
|
||||
{
|
||||
*p++ = icons[i]->width;
|
||||
*p++ = icons[i]->height;
|
||||
|
||||
uint32_t *q = icons[i]->argb;
|
||||
for (size_t k = icons[i]->width * icons[i]->height; k--; )
|
||||
*p++ = *q++;
|
||||
}
|
||||
|
||||
XChangeProperty (dpy, window, XInternAtom (dpy, "_NET_WM_ICON", False),
|
||||
XA_CARDINAL, 32, PropModeReplace, (const unsigned char *) data, n);
|
||||
free (data);
|
||||
icon_theme_free (icons);
|
||||
}
|
||||
|
||||
#endif // LIBERTY_XDG_WANT_X11
|
||||
@ -1,7 +1,7 @@
|
||||
/*
|
||||
* liberty-xui.c: the ultimate C unlibrary: hybrid terminal/X11 UI
|
||||
*
|
||||
* Copyright (c) 2016 - 2023, Přemysl Eric Janouch <p@janouch.name>
|
||||
* Copyright (c) 2016 - 2024, Přemysl Eric Janouch <p@janouch.name>
|
||||
*
|
||||
* Permission to use, copy, modify, and/or distribute this software for any
|
||||
* purpose with or without fee is hereby granted.
|
||||
@ -17,6 +17,7 @@
|
||||
*/
|
||||
|
||||
// This file includes some common stuff to build terminal/X11 applications with.
|
||||
// It assumes you've already included liberty.c, and may include liberty-xdg.c.
|
||||
|
||||
#include <ncurses.h>
|
||||
|
||||
@ -66,6 +67,9 @@ enum { XUI_KEYMOD_DOUBLE_CLICK = 1 << 15 };
|
||||
#include <X11/keysym.h>
|
||||
#include <X11/XKBlib.h>
|
||||
#include <X11/Xft/Xft.h>
|
||||
|
||||
#define LIBERTY_XDG_WANT_X11
|
||||
#include "liberty-xdg.c"
|
||||
#endif // LIBERTY_XUI_WANT_X11
|
||||
|
||||
// The application needs to implement these.
|
||||
@ -690,7 +694,10 @@ struct xui
|
||||
XftDraw *xft_draw; ///< Xft rendering context
|
||||
struct x11_font *xft_fonts; ///< Font collection
|
||||
char *x11_selection; ///< CLIPBOARD selection
|
||||
struct xdg_xsettings x11_xsettings; ///< XSETTINGS
|
||||
|
||||
int32_t x11_double_click_time; ///< Maximum delay for double clicks
|
||||
int32_t x11_double_click_distance; ///< Maximum distance for double clicks
|
||||
const char *x11_fontname; ///< Fontconfig font name
|
||||
const char *x11_fontname_monospace; ///< Fontconfig monospace font name
|
||||
XRenderColor *x_fg; ///< Foreground per attribute
|
||||
@ -1375,6 +1382,7 @@ x11_destroy (void)
|
||||
LIST_FOR_EACH (struct x11_font, font, g_xui.xft_fonts)
|
||||
x11_font_destroy (font);
|
||||
cstr_set (&g_xui.x11_selection, NULL);
|
||||
xdg_xsettings_free (&g_xui.x11_xsettings);
|
||||
|
||||
free (g_xui.x_fg);
|
||||
free (g_xui.x_bg);
|
||||
@ -1623,9 +1631,10 @@ on_x11_input_event (XEvent *ev)
|
||||
unsigned int button = ev->xbutton.button;
|
||||
int modifiers = x11_state_to_modifiers (ev->xbutton.state);
|
||||
if (ev->type == ButtonPress
|
||||
&& ev->xbutton.time - last_press_event.xbutton.time < 500
|
||||
&& abs (last_press_event.xbutton.x - x) < 5
|
||||
&& abs (last_press_event.xbutton.y - y) < 5
|
||||
&& ev->xbutton.time - last_press_event.xbutton.time
|
||||
< (Time) g_xui.x11_double_click_time
|
||||
&& abs (last_press_event.xbutton.x - x) < g_xui.x11_double_click_distance
|
||||
&& abs (last_press_event.xbutton.y - y) < g_xui.x11_double_click_distance
|
||||
&& last_press_event.xbutton.button == button)
|
||||
{
|
||||
modifiers |= XUI_KEYMOD_DOUBLE_CLICK;
|
||||
@ -1891,6 +1900,13 @@ x11_init (struct poller *poller, struct attrs *app_attrs, size_t app_attrs_len)
|
||||
|
||||
x11_init_attributes (app_attrs, app_attrs_len);
|
||||
|
||||
// https://www.freedesktop.org/wiki/Specifications/XSettingsRegistry/
|
||||
// TODO: Try to use Xft/{Antialias,DPI,HintStyle,Hinting,RGBA}
|
||||
// from XSETTINGS. Sadly, Gtk/FontName is in the Pango format,
|
||||
// which is rather difficult to parse.
|
||||
g_xui.x11_xsettings = xdg_xsettings_make ();
|
||||
xdg_xsettings_update (&g_xui.x11_xsettings, g_xui.dpy);
|
||||
|
||||
if (!FcInit ())
|
||||
print_warning ("Fontconfig initialization failed");
|
||||
if (!(g_xui.xft_fonts = x11_font_open (0)))
|
||||
@ -1942,6 +1958,25 @@ x11_init (struct poller *poller, struct attrs *app_attrs, size_t app_attrs_len)
|
||||
XSetWMName (g_xui.dpy, g_xui.x11_window, &prop);
|
||||
XFree (prop.value);
|
||||
|
||||
// It should not be outlandish to expect to find a program icon,
|
||||
// although it should be possible to use a "DBus well-known name".
|
||||
const char *icon_theme_name = NULL;
|
||||
const struct xdg_xsettings_setting *setting =
|
||||
str_map_find (&g_xui.x11_xsettings.settings, "Net/IconThemeName");
|
||||
if (setting != NULL && setting->type == XDG_XSETTINGS_STRING)
|
||||
icon_theme_name = setting->string.str;
|
||||
icon_theme_set_window_icon (g_xui.dpy,
|
||||
g_xui.x11_window, icon_theme_name, name);
|
||||
|
||||
if ((setting = str_map_find (&g_xui.x11_xsettings.settings,
|
||||
"Net/DoubleClickTime"))
|
||||
&& setting->type == XDG_XSETTINGS_INTEGER && setting->integer >= 0)
|
||||
g_xui.x11_double_click_time = setting->integer;
|
||||
if ((setting = str_map_find (&g_xui.x11_xsettings.settings,
|
||||
"Net/DoubleClickDistance"))
|
||||
&& setting->type == XDG_XSETTINGS_INTEGER && setting->integer >= 0)
|
||||
g_xui.x11_double_click_distance = setting->integer;
|
||||
|
||||
// TODO: It is possible to do, e.g., on-the-spot.
|
||||
XIMStyle im_style = XIMPreeditNothing | XIMStatusNothing;
|
||||
XIMStyles *im_styles = NULL;
|
||||
@ -2147,11 +2182,10 @@ xui_preinit (void)
|
||||
// Presumably, although not necessarily; unsure if queryable at all.
|
||||
g_xui.focused = true;
|
||||
|
||||
// TODO: Try to use Gtk/FontName from the _XSETTINGS_S%d selection,
|
||||
// as well as Net/DoubleClick*. See the XSETTINGS proposal for details.
|
||||
// https://www.freedesktop.org/wiki/Specifications/XSettingsRegistry/
|
||||
// Note that this needs an X11 connection already.
|
||||
#ifdef LIBERTY_XUI_WANT_X11
|
||||
// Note that XSETTINGS overrides some values in the init.
|
||||
g_xui.x11_double_click_time = 500;
|
||||
g_xui.x11_double_click_distance = 5;
|
||||
g_xui.x11_fontname = "sans\\-serif-11";
|
||||
g_xui.x11_fontname_monospace = "monospace-11";
|
||||
#endif // LIBERTY_XUI_WANT_X11
|
||||
|
||||
Loading…
Reference in New Issue
Block a user