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Implement GtkAccessibleText for GtkLabel

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This commit is contained in:
Matthias Clasen 2024-02-20 11:48:25 -05:00
parent 0e9b098f4e
commit 0cd077e80f
1 changed files with 129 additions and 2 deletions
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131
gtk/gtklabel.c
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@ -55,6 +55,8 @@
#include "gtkdragicon.h"
#include "gtkcsscolorvalueprivate.h"
#include "gtkjoinedmenuprivate.h"
#include "gtkaccessibletext-private.h"
#include "gtkpangoprivate.h"
#include <math.h>
#include <stdlib.h>
@ -429,18 +431,22 @@ static void gtk_label_update_active_link (GtkWidget *widget,
double y);
static void gtk_label_setup_mnemonic (GtkLabel *self);
static void gtk_label_buildable_interface_init (GtkBuildableIface *iface);
/* For selectable labels: */
static void gtk_label_move_cursor (GtkLabel *self,
GtkMovementStep step,
int count,
gboolean extend_selection);
static void gtk_label_buildable_interface_init (GtkBuildableIface *iface);
static GtkBuildableIface *buildable_parent_iface = NULL;
static void gtk_label_accessible_text_init (GtkAccessibleTextInterface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkLabel, gtk_label, GTK_TYPE_WIDGET,
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_label_buildable_interface_init))
gtk_label_buildable_interface_init)
G_IMPLEMENT_INTERFACE (GTK_TYPE_ACCESSIBLE_TEXT,
gtk_label_accessible_text_init))
static void
add_move_binding (GtkWidgetClass *widget_class,
@ -5105,8 +5111,12 @@ gtk_label_select_region_index (GtkLabel *self,
}
}
gtk_label_update_actions (self);
gtk_accessible_text_update_caret_position (GTK_ACCESSIBLE_TEXT (self));
gtk_accessible_text_update_selection_bound (GTK_ACCESSIBLE_TEXT (self));
gtk_widget_queue_draw (GTK_WIDGET (self));
g_object_thaw_notify (G_OBJECT (self));
@ -6051,3 +6061,120 @@ gtk_label_get_tabs (GtkLabel *self)
return self->tabs ? pango_tab_array_copy (self->tabs) : NULL;
}
/* {{{ GtkAccessibleText implementation */
static GBytes *
gtk_label_accessible_text_get_contents (GtkAccessibleText *self,
unsigned int start,
unsigned int end)
{
const char *text;
int len;
char *string;
gsize size;
text = gtk_label_get_text (GTK_LABEL (self));
len = g_utf8_strlen (text, -1);
start = CLAMP (start, 0, len);
end = CLAMP (end, 0, len);
if (end <= start)
{
string = g_strdup ("");
size = 1;
}
else
{
const char *p, *q;
p = g_utf8_offset_to_pointer (text, start);
q = g_utf8_offset_to_pointer (text, end);
size = q - p + 1;
string = g_strndup (p, q - p);
}
return g_bytes_new_take (string, size);
}
static GBytes *
gtk_label_accessible_text_get_contents_at (GtkAccessibleText *self,
unsigned int offset,
GtkAccessibleTextGranularity granularity,
unsigned int *start,
unsigned int *end)
{
PangoLayout *layout = gtk_label_get_layout (GTK_LABEL (self));
char *string = gtk_pango_get_string_at (layout, offset, granularity, start, end);
return g_bytes_new_take (string, strlen (string));
}
static unsigned
gtk_label_accessible_text_get_caret_position (GtkAccessibleText *self)
{
return _gtk_label_get_cursor_position (GTK_LABEL (self));
}
static gboolean
gtk_label_accessible_text_get_selection (GtkAccessibleText *self,
gsize *n_ranges,
GtkAccessibleTextRange **ranges)
{
int start, end;
if (!gtk_label_get_selection_bounds (GTK_LABEL (self), &start, &end))
return FALSE;
*n_ranges = 1;
*ranges = g_new (GtkAccessibleTextRange, 1);
(*ranges)[0].start = start;
(*ranges)[0].length = end - start;
return TRUE;
}
static gboolean
gtk_label_accessible_text_get_attributes (GtkAccessibleText *self,
unsigned int offset,
gsize *n_ranges,
GtkAccessibleTextRange **ranges,
char ***attribute_names,
char ***attribute_values)
{
PangoLayout *layout = gtk_label_get_layout (GTK_LABEL (self));
unsigned int start, end;
char **names, **values;
gtk_pango_get_run_attributes (layout, offset, &names, &values, &start, &end);
*n_ranges = g_strv_length (names);
*ranges = g_new (GtkAccessibleTextRange, *n_ranges);
for (unsigned i = 0; i < *n_ranges; i++)
{
GtkAccessibleTextRange *range = &(*ranges)[i];
range->start = start;
range->length = end - start;
}
*attribute_names = names;
*attribute_values = values;
return TRUE;
}
static void
gtk_label_accessible_text_init (GtkAccessibleTextInterface *iface)
{
iface->get_contents = gtk_label_accessible_text_get_contents;
iface->get_contents_at = gtk_label_accessible_text_get_contents_at;
iface->get_caret_position = gtk_label_accessible_text_get_caret_position;
iface->get_selection = gtk_label_accessible_text_get_selection;
iface->get_attributes = gtk_label_accessible_text_get_attributes;
}
/* }}} */
/* vim:set foldmethod=marker expandtab: */