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a11y: Consolidate accessibility environment variables

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Use a single environment variable for everything:

 - select the ATContext implementation
 - select the test ATContext
 - disable ATContext entirely

We use the same pattern as GSK_RENDERER, GTK_DEBUG, etc.

The documentation needs to be updated to include the environment
variable.
This commit is contained in:
Emmanuele Bassi 2020-11-07 12:50:11 +00:00
parent e093ed7d67
commit 0af6630521
27 changed files with 79 additions and 56 deletions
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18
docs/reference/gtk/running.md
View File

@ -293,6 +293,24 @@ CSD is always used for windows with a custom titlebar widget set,
as the WM should not draw another titlebar or other decorations
around the custom one.
### GTK_A11Y
If set, selects the accessibility backend to use. The following
backends can be selected, provided they are included in the GTK
library you are using:
help
: Prints information about available options
atspi
: Selects the AT-SPI accessibility backend
test
: Selects the test backend
none
: Disables the accessibility backend
The `test` accessibility backend is recommended for test suites and remote
continuous integration pipelines.
### XDG_DTA_HOME, XDG_DATA_DIRS
GTK uses these environment variables to locate icon themes

59
gtk/gtkatcontext.c
View File

@ -448,17 +448,19 @@ gtk_at_context_get_display (GtkATContext *self)
static const struct {
const char *name;
const char *env_name;
GtkATContext * (* create_context) (GtkAccessibleRole accessible_role,
GtkAccessible *accessible,
GdkDisplay *display);
} a11y_backends[] = {
#if defined(GDK_WINDOWING_WAYLAND)
{ "AT-SPI (Wayland)", gtk_at_spi_create_context },
{ "AT-SPI (Wayland)", "atspi", gtk_at_spi_create_context },
#endif
#if defined(GDK_WINDOWING_X11)
{ "AT-SPI (X11)", gtk_at_spi_create_context },
{ "AT-SPI (X11)", "atspi", gtk_at_spi_create_context },
#endif
{ NULL, NULL },
{ "Test", "test", gtk_test_at_context_new },
{ NULL, NULL, NULL },
};
/**
@ -480,36 +482,32 @@ gtk_at_context_create (GtkAccessibleRole accessible_role,
GtkAccessible *accessible,
GdkDisplay *display)
{
static const char *gtk_test_accessible;
static const char *gtk_no_a11y;
static const char *gtk_a11y_env;
if (G_UNLIKELY (gtk_test_accessible == NULL))
if (gtk_a11y_env == NULL)
{
const char *env = g_getenv ("GTK_TEST_ACCESSIBLE");
if (env != NULL && *env !='\0')
gtk_test_accessible = "1";
else
gtk_test_accessible = "0";
gtk_a11y_env = g_getenv ("GTK_A11Y");
if (gtk_a11y_env == NULL)
gtk_a11y_env = "0";
}
if (G_UNLIKELY (gtk_no_a11y == NULL))
{
const char *env = g_getenv ("GTK_NO_A11Y");
if (env != NULL && *env != '\0')
gtk_no_a11y = "1";
else
gtk_no_a11y = "0";
}
/* Shortcut everything if we're running with the test AT context */
if (gtk_test_accessible[0] == '1')
return gtk_test_at_context_new (accessible_role, accessible);
if (gtk_no_a11y[0] == '1')
/* Short-circuit disabling the accessibility support */
if (g_ascii_strcasecmp (gtk_a11y_env, "none") == 0)
return NULL;
if (g_ascii_strcasecmp (gtk_a11y_env, "help") == 0)
{
g_print ("Supported arguments for GTK_A11Y environment variable:\n");
#if defined(GDK_WINDOWING_X11) || defined(GDK_WINDOWING_WAYLAND)
g_print (" atspi - Use the AT-SPI accessibility backend\n");
#endif
g_print (" test - Use the test accessibility backend\n");
g_print (" none - Disable the accessibility backend\n");
g_print (" help - Print this help\n\n");
g_print ("Other arguments will cause a warning and be ignored.\n");
}
GtkATContext *res = NULL;
for (guint i = 0; i < G_N_ELEMENTS (a11y_backends); i++)
@ -517,7 +515,8 @@ gtk_at_context_create (GtkAccessibleRole accessible_role,
if (a11y_backends[i].name == NULL)
break;
if (a11y_backends[i].create_context != NULL)
if (a11y_backends[i].create_context != NULL &&
(*gtk_a11y_env == '0' || g_ascii_strcasecmp (a11y_backends[i].env_name, gtk_a11y_env) == 0))
{
res = a11y_backends[i].create_context (accessible_role, accessible, display);
if (res != NULL)
@ -525,6 +524,9 @@ gtk_at_context_create (GtkAccessibleRole accessible_role,
}
}
if (*gtk_a11y_env != '0' && res == NULL)
g_warning ("Unrecognized accessibility backend \"%s\". Try GTK_A11Y=help", gtk_a11y_env);
/* Fall back to the test context, so we can get debugging data */
if (res == NULL)
res = g_object_new (GTK_TYPE_TEST_AT_CONTEXT,
@ -533,7 +535,6 @@ gtk_at_context_create (GtkAccessibleRole accessible_role,
"display", display,
NULL);
/* FIXME: Add GIOExtension for AT contexts */
return res;
}

5
gtk/gtktestatcontext.c
View File

@ -95,6 +95,7 @@ gtk_test_at_context_init (GtkTestATContext *self)
* gtk_test_at_context_new:
* @accessible_role: the #GtkAccessibleRole for the AT context
* @accessible: the #GtkAccessible instance which owns the AT context
* @display: a #GdkDisplay
*
* Creates a new #GtkTestATContext instance for @accessible, using the
* given @accessible_role.
@ -103,11 +104,13 @@ gtk_test_at_context_init (GtkTestATContext *self)
*/
GtkATContext *
gtk_test_at_context_new (GtkAccessibleRole accessible_role,
GtkAccessible *accessible)
GtkAccessible *accessible,
GdkDisplay *display)
{
return g_object_new (GTK_TYPE_TEST_AT_CONTEXT,
"accessible-role", accessible_role,
"accessible", accessible,
"display", display,
NULL);
}

3
gtk/gtktestatcontextprivate.h
View File

@ -31,6 +31,7 @@ G_DECLARE_FINAL_TYPE (GtkTestATContext, gtk_test_at_context, GTK, TEST_AT_CONTEX
GtkATContext *
gtk_test_at_context_new (GtkAccessibleRole accessible_role,
GtkAccessible *accessible);
GtkAccessible *accessible,
GdkDisplay *display);
G_END_DECLS

2
testsuite/a11y/meson.build
View File

@ -50,7 +50,7 @@ foreach flag: common_cflags
endforeach
test_env = environment()
test_env.set('GTK_TEST_ACCESSIBLE', '1')
test_env.set('GTK_A11Y', 'test')
test_env.set('GSK_RENDERER', 'cairo')
test_env.set('G_TEST_SRCDIR', meson.current_source_dir())
test_env.set('G_TEST_BUILDDIR', meson.current_build_dir())

2
testsuite/css/api.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_TEST_ACCESSIBLE=1 @libexecdir@/installed-tests/gtk-4.0/css/api --tap -k"
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_A11Y=test @libexecdir@/installed-tests/gtk-4.0/css/api --tap -k"
Type=session
Output=TAP

2
testsuite/css/change/change.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_TEST_ACCESSIBLE=1 @libexecdir@/installed-tests/gtk-4.0/css/change/test-css-change --tap -k"
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_A11Y=test @libexecdir@/installed-tests/gtk-4.0/css/change/test-css-change --tap -k"
Type=session
Output=TAP

2
testsuite/css/change/meson.build
View File

@ -1,5 +1,5 @@
changetest_env = environment()
changetest_env.set('GTK_TEST_ACCESSIBLE', '1')
changetest_env.set('GTK_A11Y', 'test')
changetest_env.set('GSK_RENDERER', 'cairo')
changetest_env.set('G_TEST_SRCDIR', meson.current_source_dir())
changetest_env.set('G_TEST_BUILDDIR', meson.current_build_dir())

2
testsuite/css/meson.build
View File

@ -1,5 +1,5 @@
csstest_env = environment()
csstest_env.set('GTK_TEST_ACCESSIBLE', '1')
csstest_env.set('GTK_A11Y', 'test')
csstest_env.set('GSK_RENDERER', 'cairo')
csstest_env.set('G_TEST_SRCDIR', meson.current_source_dir())
csstest_env.set('G_TEST_BUILDDIR', meson.current_build_dir())

2
testsuite/css/nodes/meson.build
View File

@ -1,5 +1,5 @@
nodetest_env = environment()
nodetest_env.set('GTK_TEST_ACCESSIBLE', '1')
nodetest_env.set('GTK_A11Y', 'test')
nodetest_env.set('GSK_RENDERER', 'cairo')
nodetest_env.set('G_TEST_SRCDIR', meson.current_source_dir())
nodetest_env.set('G_TEST_BUILDDIR', meson.current_build_dir())

2
testsuite/css/nodes/nodes.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_TEST_ACCESSIBLE=1 @libexecdir@/installed-tests/gtk-4.0/css/nodes/test-css-nodes --tap -k"
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_A11Y=test @libexecdir@/installed-tests/gtk-4.0/css/nodes/test-css-nodes --tap -k"
Type=session
Output=TAP

2
testsuite/css/parser/parser.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_TEST_ACCESSIBLE=1 @libexecdir@/installed-tests/gtk-4.0/css/parser/test-css-parser --tap -k"
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_A11Y=test @libexecdir@/installed-tests/gtk-4.0/css/parser/test-css-parser --tap -k"
Type=session
Output=TAP

2
testsuite/css/style/meson.build
View File

@ -1,5 +1,5 @@
styletest_env = environment()
styletest_env.set('GTK_TEST_ACCESSIBLE', '1')
styletest_env.set('GTK_A11Y', 'test')
styletest_env.set('GSK_RENDERER', 'cairo')
styletest_env.set('G_TEST_SRCDIR', meson.current_source_dir())
styletest_env.set('G_TEST_BUILDDIR', meson.current_build_dir())

2
testsuite/css/style/style.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_TEST_ACCESSIBLE=1 @libexecdir@/installed-tests/gtk-4.0/css/style/test-css-style --tap -k"
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_A11Y=test @libexecdir@/installed-tests/gtk-4.0/css/style/test-css-style --tap -k"
Type=session
Output=TAP

2
testsuite/gdk/gdk.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_TEST_ACCESSIBLE=1 @testexecdir@/@test@ --tap -k --verbose"
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_A11Y=test @testexecdir@/@test@ --tap -k --verbose"
Type=session
Output=TAP

6
testsuite/gsk/meson.build
View File

@ -101,7 +101,7 @@ foreach renderer : renderers
join_paths(meson.current_source_dir(), 'compare', test + '.png')],
env: [
'GSK_RENDERER=' + renderer[0],
'GTK_TEST_ACCESSIBLE=1',
'GTK_A11Y=test',
'G_TEST_SRCDIR=@0@'.format(meson.current_source_dir()),
'G_TEST_BUILDDIR=@0@'.format(meson.current_build_dir())
],
@ -179,7 +179,7 @@ foreach test : node_parser_tests
],
env: [
'GSK_RENDERER=opengl',
'GTK_TEST_ACCESSIBLE=1',
'GTK_A11Y=test',
'G_TEST_SRCDIR=@0@'.format(meson.current_source_dir()),
'G_TEST_BUILDDIR=@0@'.format(meson.current_build_dir())
],
@ -213,7 +213,7 @@ foreach t : tests
protocol: 'tap',
env: [
'GSK_RENDERER=cairo',
'GTK_TEST_ACCESSIBLE=1',
'GTK_A11Y=test',
'G_TEST_SRCDIR=@0@'.format(meson.current_source_dir()),
'G_TEST_BUILDDIR=@0@'.format(meson.current_build_dir())
],

2
testsuite/gsk/render-nodes-cairo.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GSK_RENDERER=cairo GTK_TEST_ACCESSIBLE=1 @libexecdir@/installed-tests/gtk-4.0/gsk/test-render-nodes --tap -k --verbose"
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GSK_RENDERER=cairo GTK_A11Y=test @libexecdir@/installed-tests/gtk-4.0/gsk/test-render-nodes --tap -k --verbose"
Type=session
Output=TAP

2
testsuite/gsk/render-nodes-vulkan.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env GTK_TEST_ACCESSIBLE=1 GSK_RENDERER=vulkan @libexecdir@/installed-tests/gtk-4.0/gsk/test-render-nodes --tap -k --verbose"
Exec=/bin/sh -c "env GTK_A11Y=test GSK_RENDERER=vulkan @libexecdir@/installed-tests/gtk-4.0/gsk/test-render-nodes --tap -k --verbose"
Type=session
Output=TAP

2
testsuite/gtk/gtk.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_TEST_ACCESSIBLE=1 @testexecdir@/@test@ --tap -k --verbose"
Exec=/bin/sh -c "env G_ENABLE_DIAGNOSTIC=0 GTK_A11Y=test @testexecdir@/@test@ --tap -k --verbose"
Type=session
Output=TAP

2
testsuite/gtk/meson.build
View File

@ -147,7 +147,7 @@ is_debug = get_option('buildtype').startswith('debug')
test_cargs = []
test_env = environment()
test_env.set('GTK_TEST_ACCESSIBLE', '1')
test_env.set('GTK_A11Y', 'test')
test_env.set('GSK_RENDERER', 'cairo')
test_env.set('G_TEST_SRCDIR', meson.current_source_dir())
test_env.set('G_TEST_BUILDDIR', meson.current_build_dir())

2
testsuite/reftests/meson.build
View File

@ -451,7 +451,7 @@ xfails = [
]
reftest_env = environment()
reftest_env.set('GTK_TEST_ACCESSIBLE', '1')
reftest_env.set('GTK_A11Y', 'test')
reftest_env.set('GSK_RENDERER', 'opengl')
reftest_env.set('G_TEST_SRCDIR', meson.current_source_dir())
reftest_env.set('G_TEST_BUILDDIR', meson.current_build_dir())

2
testsuite/reftests/reftests-dark.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env GTK_THEME=Adwaita:dark GTK_TEST_ACCESSIBLE=1 G_ENABLE_DIAGNOSTIC=0 @libexecdir@/installed-tests/gtk-4.0/gtk-reftest -k --verbose --tap --output $(pwd) --directory @libexecdir@/installed-tests/gtk-4.0/reftests"
Exec=/bin/sh -c "env GTK_THEME=Adwaita:dark GTK_A11Y=test G_ENABLE_DIAGNOSTIC=0 @libexecdir@/installed-tests/gtk-4.0/gtk-reftest -k --verbose --tap --output $(pwd) --directory @libexecdir@/installed-tests/gtk-4.0/reftests"
Type=session-exclusive
Output=TAP

2
testsuite/reftests/reftests-hc.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env GTK_THEME=HighContrast GTK_TEST_ACCESSIBLE=1 G_ENABLE_DIAGNOSTIC=0 @libexecdir@/installed-tests/gtk-4.0/gtk-reftest -k --verbose --tap --output $(pwd) --directory @libexecdir@/installed-tests/gtk-4.0/reftests"
Exec=/bin/sh -c "env GTK_THEME=HighContrast GTK_A11Y=test G_ENABLE_DIAGNOSTIC=0 @libexecdir@/installed-tests/gtk-4.0/gtk-reftest -k --verbose --tap --output $(pwd) --directory @libexecdir@/installed-tests/gtk-4.0/reftests"
Type=session-exclusive
Output=TAP

2
testsuite/reftests/reftests-hci.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env GTK_THEME=HighContrastInverse GTK_TEST_ACCESSIBLE=1 G_ENABLE_DIAGNOSTIC=0 @libexecdir@/installed-tests/gtk-4.0/gtk-reftest -k --verbose --tap --output $(pwd) --directory @libexecdir@/installed-tests/gtk-4.0/reftests"
Exec=/bin/sh -c "env GTK_THEME=HighContrastInverse GTK_A11Y=test G_ENABLE_DIAGNOSTIC=0 @libexecdir@/installed-tests/gtk-4.0/gtk-reftest -k --verbose --tap --output $(pwd) --directory @libexecdir@/installed-tests/gtk-4.0/reftests"
Type=session-exclusive
Output=TAP

2
testsuite/reftests/reftests.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env GTK_TEST_ACCESSIBLE=1 G_ENABLE_DIAGNOSTIC=0 @libexecdir@/installed-tests/gtk-4.0/gtk-reftest -k --verbose --tap --output $(pwd) --directory @libexecdir@/installed-tests/gtk-4.0/reftests"
Exec=/bin/sh -c "env GTK_A11Y=test G_ENABLE_DIAGNOSTIC=0 @libexecdir@/installed-tests/gtk-4.0/gtk-reftest -k --verbose --tap --output $(pwd) --directory @libexecdir@/installed-tests/gtk-4.0/reftests"
Type=session-exclusive
Output=TAP

2
testsuite/tools/meson.build
View File

@ -23,7 +23,7 @@ if bash.found()
env: [
'G_TEST_SRCDIR=@0@'.format(meson.current_source_dir()),
'G_TEST_BUILDDIR=@0@'.format(meson.current_build_dir()),
'GTK_TEST_ACCESSIBLE=1',
'GTK_A11Y=test',
'GTK_BUILDER_TOOL=@0@'.format(get_variable('gtk4_builder_tool').full_path()),
'GTK_QUERY_SETTINGS=@0@'.format(get_variable('gtk4_query_settings').full_path())
],

2
testsuite/tools/tools.test.in
View File

@ -1,4 +1,4 @@
[Test]
Exec=/bin/sh -c "env GTK_TEST_ACCESSIBLE=1 G_ENABLE_DIAGNOSTIC=0 TEST_DATA_DIR=@testexecdir@/@test@-data @testexecdir@/@test@"
Exec=/bin/sh -c "env GTK_A11Y=test G_ENABLE_DIAGNOSTIC=0 TEST_DATA_DIR=@testexecdir@/@test@-data @testexecdir@/@test@"
Type=session
Output=TAP