Introduce support for specifying variables from X resources. (#2286)

This patch introduces a new 'set_from_resource' config directive which
allows defining a variable by retrieving its value from the X resource
database. This avoids having to configure a color scheme in multiple
files. The directive takes an additional fallback value which is used
in case the resource cannot be found or during config validation where
no X connection is available.

Furthermore, this patch includes the following changes:
- If the same variable is defined twice, we now properly overwrite the
  value of the assignment rather than inserting two variable definitions
  with the same key.
- We now depend on xcb-util-xrm to query the resource.
- Increase the buffer size for variable / resource assignments.

fixes #2130
This commit is contained in:
Ingo Bürk 2016-05-08 12:55:27 +02:00 committed by Michael Stapelberg
parent dbafb3cf23
commit 47562b4143
12 changed files with 253 additions and 55 deletions

11
DEPENDS
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@ -4,9 +4,9 @@
"min" means minimum required version
"lkgv" means last known good version
┌──────────────┬────────┬────────┬────────────────────────────────────────┐
┌──────────────┬────────┬────────┬───────────────────────────────────────────────────────────
│ dependency │ min. │ lkgv │ URL │
├──────────────┼────────┼────────┼────────────────────────────────────────┤
├──────────────┼────────┼────────┼───────────────────────────────────────────────────────────
│ pkg-config │ 0.25 │ 0.28 │ http://pkgconfig.freedesktop.org/ │
│ libxcb │ 1.1.93 │ 1.11 │ http://xcb.freedesktop.org/dist/ │
│ xcb-util │ 0.3.3 │ 0.4.1 │ http://xcb.freedesktop.org/dist/ │
@ -15,17 +15,18 @@
│ util-cursor³⁴│ 0.0.99 │ 0.1.2 │ http://xcb.freedesktop.org/dist/ │
│ util-wm⁴ │ 0.3.8 │ 0.3.8 │ http://xcb.freedesktop.org/dist/ │
│ util-keysyms⁴│ 0.3.8 │ 0.4.0 │ http://xcb.freedesktop.org/dist/ │
│ util-xrm⁴ │ 1.0.0 │ 1.0.0 │ https://github.com/Airblader/xcb-util-xrm │
│ libev │ 4.0 │ 4.19 │ http://libev.schmorp.de/ │
│ yajl │ 2.0.1 │ 2.1.0 │ http://lloyd.github.com/yajl/ │
│ asciidoc │ 8.3.0 │ 8.6.8 │ http://www.methods.co.nz/asciidoc/ │
│ xmlto │ 0.0.23 │ 0.0.23 │ http://www.methods.co.nz/asciidoc/ │
│ Pod::Simple² │ 3.22 │ 3.22 │ http://search.cpan.org/~dwheeler/Pod-Simple-3.23/
│ Pod::Simple² │ 3.22 │ 3.22 │ http://search.cpan.org/~dwheeler/Pod-Simple-3.23/
│ docbook-xml │ 4.5 │ 4.5 │ http://www.methods.co.nz/asciidoc/ │
│ PCRE │ 8.12 │ 8.35 │ http://www.pcre.org/ │
│ libsn¹ │ 0.10 │ 0.12 │ http://freedesktop.org/wiki/Software/startup-notification
│ libsn¹ │ 0.10 │ 0.12 │ http://freedesktop.org/wiki/Software/startup-notification
│ pango │ 1.30.0 | 1.36.8 │ http://www.pango.org/ │
│ cairo │ 1.14.4 │ 1.14.4 │ http://cairographics.org/ │
└──────────────┴────────┴────────┴────────────────────────────────────────┘
└──────────────┴────────┴────────┴───────────────────────────────────────────────────────────
¹ libsn = libstartup-notification
² Pod::Simple is a Perl module required for converting the testsuite
documentation to HTML. See http://michael.stapelberg.de/cpan/#Pod::Simple

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@ -126,6 +126,10 @@ XKB_COMMON_LIBS := $(call ldflags_for_lib, xkbcommon,xkbcommon)
XKB_COMMON_X11_CFLAGS := $(call cflags_for_lib, xkbcommon-x11,xkbcommon-x11)
XKB_COMMON_X11_LIBS := $(call ldflags_for_lib, xkbcommon-x11,xkbcommon-x11)
# XCB xrm
XCB_XRM_CFLAGS := $(call cflags_for_lib, xcb-xrm)
XCB_XRM_LIBS := $(call ldflags_for_lib, xcb-xrm,xcb-xrm)
# yajl
YAJL_CFLAGS := $(call cflags_for_lib, yajl)
YAJL_LIBS := $(call ldflags_for_lib, yajl,yajl)

1
debian/control vendored
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@ -10,6 +10,7 @@ Build-Depends: debhelper (>= 9),
libxcb-randr0-dev,
libxcb-icccm4-dev,
libxcb-cursor-dev,
libxcb-xrm-dev,
libxcb-xkb-dev,
libxkbcommon-dev (>= 0.4.0),
libxkbcommon-x11-dev (>= 0.4.0),

View File

@ -700,6 +700,38 @@ absolutely no plans to change this. If you need a more dynamic configuration
you should create a little script which generates a configuration file and run
it before starting i3 (for example in your +~/.xsession+ file).
Also see <<xresources>> to learn how to create variables based on resources
loaded from the X resource database.
[[xresources]]
=== X resources
<<variables>> can also be created using a value configured in the X resource
database. This is useful, for example, to avoid configuring color values within
the i3 configuration. Instead, the values can be configured, once, in the X
resource database to achieve an easily maintainable, consistent color theme
across many X applications.
Defining a resource will load this resource from the resource database and
assign its value to the specified variable. A fallback must be specified in
case the resource cannot be loaded from the database.
*Syntax*:
----------------------------------------------------
set_from_resource $<name> <resource_name> <fallback>
----------------------------------------------------
*Example*:
----------------------------------------------------------------------------
# The ~/.Xresources should contain a line such as
# *color0: #121212
# and must be loaded properly, e.g., by using
# xrdb ~/.Xresources
# This value is picked up on by other applications (e.g., the URxvt terminal
# emulator) and can be used in i3 like this:
set_from_resource $black i3wm.color0 #000000
----------------------------------------------------------------------------
[[assign_workspace]]
=== Automatically putting clients on specific workspaces

View File

@ -11,6 +11,7 @@
#include <yajl/yajl_gen.h>
SLIST_HEAD(variables_head, Variable);
extern pid_t config_error_nagbar_pid;
/*

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@ -18,6 +18,7 @@ state INITIAL:
error ->
'#' -> IGNORE_LINE
'set' -> IGNORE_LINE
'set_from_resource' -> IGNORE_LINE
bindtype = 'bindsym', 'bindcode', 'bind' -> BINDING
'bar' -> BARBRACE
'font' -> FONT

View File

@ -35,6 +35,7 @@
#include <sys/wait.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <xcb/xcb_xrm.h>
#include "all.h"
@ -42,6 +43,8 @@
#define y(x, ...) yajl_gen_##x(command_output.json_gen, ##__VA_ARGS__)
#define ystr(str) yajl_gen_string(command_output.json_gen, (unsigned char *)str, strlen(str))
xcb_xrm_database_t *database = NULL;
#ifndef TEST_PARSER
pid_t config_error_nagbar_pid = -1;
static struct context *context;
@ -811,18 +814,80 @@ void start_config_error_nagbar(const char *configpath, bool has_errors) {
free(pageraction);
}
/*
* Inserts or updates a variable assignment depending on whether it already exists.
*
*/
static void upsert_variable(struct variables_head *variables, char *key, char *value) {
struct Variable *current;
SLIST_FOREACH(current, variables, variables) {
if (strcmp(current->key, key) != 0) {
continue;
}
DLOG("Updated variable: %s = %s -> %s\n", key, current->value, value);
FREE(current->value);
current->value = sstrdup(value);
return;
}
DLOG("Defined new variable: %s = %s\n", key, value);
struct Variable *new = scalloc(1, sizeof(struct Variable));
struct Variable *test = NULL, *loc = NULL;
new->key = sstrdup(key);
new->value = sstrdup(value);
/* ensure that the correct variable is matched in case of one being
* the prefix of another */
SLIST_FOREACH(test, variables, variables) {
if (strlen(new->key) >= strlen(test->key))
break;
loc = test;
}
if (loc == NULL) {
SLIST_INSERT_HEAD(variables, new, variables);
} else {
SLIST_INSERT_AFTER(loc, new, variables);
}
}
static char *get_resource(char *name) {
if (conn == NULL) {
return NULL;
}
/* Load the resource database lazily. */
if (database == NULL) {
database = xcb_xrm_database_from_default(conn);
if (database == NULL) {
ELOG("Failed to open the resource database.\n");
/* Load an empty database so we don't keep trying to load the
* default database over and over again. */
database = xcb_xrm_database_from_string("");
return NULL;
}
}
char *resource;
xcb_xrm_resource_get_string(database, name, NULL, &resource);
return resource;
}
/*
* Parses the given file by first replacing the variables, then calling
* parse_config and possibly launching i3-nagbar.
*
*/
bool parse_file(const char *f, bool use_nagbar) {
SLIST_HEAD(variables_head, Variable) variables = SLIST_HEAD_INITIALIZER(&variables);
struct variables_head variables = SLIST_HEAD_INITIALIZER(&variables);
int fd;
struct stat stbuf;
char *buf;
FILE *fstr;
char buffer[4096], key[512], value[512], *continuation = NULL;
char buffer[4096], key[512], value[4096], *continuation = NULL;
if ((fd = open(f, O_RDONLY)) == -1)
die("Could not open configuration file: %s\n", strerror(errno));
@ -848,8 +913,9 @@ bool parse_file(const char *f, bool use_nagbar) {
}
/* sscanf implicitly strips whitespace. */
const bool skip_line = (sscanf(buffer, "%511s %511[^\n]", key, value) < 1 || strlen(key) < 3);
const bool skip_line = (sscanf(buffer, "%511s %4095[^\n]", key, value) < 1 || strlen(key) < 3);
const bool comment = (key[0] == '#');
value[4095] = '\n';
continuation = strstr(buffer, "\\\n");
if (continuation) {
@ -868,49 +934,55 @@ bool parse_file(const char *f, bool use_nagbar) {
}
if (strcasecmp(key, "set") == 0) {
if (value[0] != '$') {
char v_key[512];
char v_value[4096];
if (sscanf(value, "%511s %4095[^\n]", v_key, v_value) < 1) {
ELOG("Failed to parse variable specification '%s', skipping it.\n", value);
continue;
}
if (v_key[0] != '$') {
ELOG("Malformed variable assignment, name has to start with $\n");
continue;
}
/* get key/value for this variable */
char *v_key = value, *v_value;
if (strstr(value, " ") == NULL && strstr(value, "\t") == NULL) {
ELOG("Malformed variable assignment, need a value\n");
upsert_variable(&variables, v_key, v_value);
continue;
} else if (strcasecmp(key, "set_from_resource") == 0) {
char res_name[512];
char v_key[512];
char fallback[4096];
if (sscanf(value, "%511s %511s %4095[^\n]", v_key, res_name, fallback) < 1) {
ELOG("Failed to parse resource specification '%s', skipping it.\n", value);
continue;
}
if (!(v_value = strstr(value, " ")))
v_value = strstr(value, "\t");
*(v_value++) = '\0';
while (*v_value == '\t' || *v_value == ' ')
v_value++;
struct Variable *new = scalloc(1, sizeof(struct Variable));
struct Variable *test = NULL, *loc = NULL;
new->key = sstrdup(v_key);
new->value = sstrdup(v_value);
/* ensure that the correct variable is matched in case of one being
* the prefix of another */
SLIST_FOREACH(test, &variables, variables) {
if (strlen(new->key) >= strlen(test->key))
break;
loc = test;
if (v_key[0] != '$') {
ELOG("Malformed variable assignment, name has to start with $\n");
continue;
}
if (loc == NULL) {
SLIST_INSERT_HEAD(&variables, new, variables);
} else {
SLIST_INSERT_AFTER(loc, new, variables);
char *res_value = get_resource(res_name);
if (res_value == NULL) {
DLOG("Could not get resource '%s', using fallback '%s'.\n", res_name, fallback);
res_value = sstrdup(fallback);
}
DLOG("Got new variable %s = %s\n", v_key, v_value);
upsert_variable(&variables, v_key, res_value);
FREE(res_value);
continue;
}
}
fclose(fstr);
if (database != NULL) {
xcb_xrm_database_free(database);
/* Explicitly set the database to NULL again in case the config gets reloaded. */
database = NULL;
}
/* For every custom variable, see how often it occurs in the file and
* how much extra bytes it requires when replaced. */
struct Variable *current, *nearest;

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@ -5,8 +5,8 @@ CLEAN_TARGETS += clean-i3
i3_SOURCES := $(filter-out $(i3_SOURCES_GENERATED),$(wildcard src/*.c))
i3_HEADERS_CMDPARSER := $(wildcard include/GENERATED_*.h)
i3_HEADERS := $(filter-out $(i3_HEADERS_CMDPARSER),$(wildcard include/*.h))
i3_CFLAGS = $(XKB_COMMON_CFLAGS) $(XKB_COMMON_X11_CFLAGS) $(XCB_CFLAGS) $(XCB_KBD_CFLAGS) $(XCB_WM_CFLAGS) $(XCB_CURSOR_CFLAGS) $(PANGO_CFLAGS) $(YAJL_CFLAGS) $(LIBEV_CFLAGS) $(PCRE_CFLAGS) $(LIBSN_CFLAGS)
i3_LIBS = $(XKB_COMMON_LIBS) $(XKB_COMMON_X11_LIBS) $(XCB_LIBS) $(XCB_XKB_LIBS) $(XCB_KBD_LIBS) $(XCB_WM_LIBS) $(XCB_CURSOR_LIBS) $(PANGO_LIBS) $(YAJL_LIBS) $(LIBEV_LIBS) $(PCRE_LIBS) $(LIBSN_LIBS) -lm -lpthread
i3_CFLAGS = $(XKB_COMMON_CFLAGS) $(XKB_COMMON_X11_CFLAGS) $(XCB_CFLAGS) $(XCB_KBD_CFLAGS) $(XCB_WM_CFLAGS) $(XCB_CURSOR_CFLAGS) $(XCB_XRM_CFLAGS) $(PANGO_CFLAGS) $(YAJL_CFLAGS) $(LIBEV_CFLAGS) $(PCRE_CFLAGS) $(LIBSN_CFLAGS)
i3_LIBS = $(XKB_COMMON_LIBS) $(XKB_COMMON_X11_LIBS) $(XCB_LIBS) $(XCB_XKB_LIBS) $(XCB_KBD_LIBS) $(XCB_WM_LIBS) $(XCB_CURSOR_LIBS) $(XCB_XRM_LIBS) $(PANGO_LIBS) $(YAJL_LIBS) $(LIBEV_LIBS) $(PCRE_LIBS) $(LIBSN_LIBS) -lm -lpthread
# When using clang, we use pre-compiled headers to speed up the build. With
# gcc, this actually makes the build slower.

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@ -441,7 +441,7 @@ client.focused #4c7899 #285577 #ffffff #2e9ef4
EOT
my $expected_all_tokens = <<'EOT';
ERROR: CONFIG: Expected one of these tokens: <end>, '#', 'set', 'bindsym', 'bindcode', 'bind', 'bar', 'font', 'mode', 'floating_minimum_size', 'floating_maximum_size', 'floating_modifier', 'default_orientation', 'workspace_layout', 'new_window', 'new_float', 'hide_edge_borders', 'for_window', 'assign', 'no_focus', 'focus_follows_mouse', 'mouse_warping', 'force_focus_wrapping', 'force_xinerama', 'force-xinerama', 'workspace_auto_back_and_forth', 'fake_outputs', 'fake-outputs', 'force_display_urgency_hint', 'focus_on_window_activation', 'show_marks', 'workspace', 'ipc_socket', 'ipc-socket', 'restart_state', 'popup_during_fullscreen', 'exec_always', 'exec', 'client.background', 'client.focused_inactive', 'client.focused', 'client.unfocused', 'client.urgent', 'client.placeholder'
ERROR: CONFIG: Expected one of these tokens: <end>, '#', 'set', 'set_from_resource', 'bindsym', 'bindcode', 'bind', 'bar', 'font', 'mode', 'floating_minimum_size', 'floating_maximum_size', 'floating_modifier', 'default_orientation', 'workspace_layout', 'new_window', 'new_float', 'hide_edge_borders', 'for_window', 'assign', 'no_focus', 'focus_follows_mouse', 'mouse_warping', 'force_focus_wrapping', 'force_xinerama', 'force-xinerama', 'workspace_auto_back_and_forth', 'fake_outputs', 'fake-outputs', 'force_display_urgency_hint', 'focus_on_window_activation', 'show_marks', 'workspace', 'ipc_socket', 'ipc-socket', 'restart_state', 'popup_during_fullscreen', 'exec_always', 'exec', 'client.background', 'client.focused_inactive', 'client.focused', 'client.unfocused', 'client.urgent', 'client.placeholder'
EOT
my $expected_end = <<'EOT';

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@ -0,0 +1,64 @@
#!perl
# vim:ts=4:sw=4:expandtab
#
# Please read the following documents before working on tests:
# • http://build.i3wm.org/docs/testsuite.html
# (or docs/testsuite)
#
# • http://build.i3wm.org/docs/lib-i3test.html
# (alternatively: perldoc ./testcases/lib/i3test.pm)
#
# • http://build.i3wm.org/docs/ipc.html
# (or docs/ipc)
#
# • http://onyxneon.com/books/modern_perl/modern_perl_a4.pdf
# (unless you are already familiar with Perl)
#
# Tests for using X resources in the config.
# Ticket: #2130
use i3test i3_autostart => 0;
use X11::XCB qw(PROP_MODE_REPLACE);
sub get_marks {
return i3(get_socket_path())->get_marks->recv;
}
my $config = <<EOT;
# i3 config file (v4)
font -misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1
# This isn't necessarily what X resources are intended for, but it'll do the
# job for the test.
set_from_resource \$mark i3wm.mark none
for_window [class=worksforme] mark \$mark
set_from_resource \$othermark i3wm.doesnotexist none
for_window [class=doesnotworkforme] mark \$othermark
EOT
$x->change_property(
PROP_MODE_REPLACE,
$x->get_root_window(),
$x->atom(name => 'RESOURCE_MANAGER')->id,
$x->atom(name => 'STRING')->id,
32,
length('*mark: works'),
'*mark: works');
$x->flush;
my $pid = launch_with_config($config);
open_window(wm_class => 'worksforme');
sync_with_i3;
is_deeply(get_marks(), [ 'works' ], 'the resource has loaded correctly');
cmd 'kill';
open_window(wm_class => 'doesnotworkforme');
sync_with_i3;
is_deeply(get_marks(), [ 'none' ], 'the resource fallback was used');
exit_gracefully($pid);
done_testing;

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@ -27,3 +27,14 @@ COPY debian/control /usr/src/i3-debian-packaging/control
RUN linux32 apt-get update && \
DEBIAN_FRONTEND=noninteractive mk-build-deps --install --remove --tool 'apt-get --no-install-recommends -y' /usr/src/i3-debian-packaging/control && \
rm -rf /var/lib/apt/lists/*
# Install xcb-util-xrm. This is a workaround until it is available in the
# distribution packages.
RUN apt-get update && \
DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends xutils-dev
RUN git clone --recursive https://github.com/Airblader/xcb-util-xrm.git && \
cd xcb-util-xrm && \
./autogen.sh --prefix=/usr && \
make && \
make install && \
cd -

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@ -28,3 +28,14 @@ COPY debian/control /usr/src/i3-debian-packaging/control
RUN apt-get update && \
DEBIAN_FRONTEND=noninteractive mk-build-deps --install --remove --tool 'apt-get --no-install-recommends -y' /usr/src/i3-debian-packaging/control && \
rm -rf /var/lib/apt/lists/*
# Install xcb-util-xrm. This is a workaround until it is available in the
# distribution packages.
RUN apt-get update && \
DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends xutils-dev
RUN git clone --recursive https://github.com/Airblader/xcb-util-xrm.git && \
cd xcb-util-xrm && \
./autogen.sh --prefix=/usr && \
make && \
make install && \
cd -