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a11y: cally-text get_character_extents implementation

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See http://bugzilla.clutter-project.org/show_bug.cgi?id=1733
This commit is contained in:
Philippe Normand 2011-02-02 11:29:33 +01:00 committed by Alejandro Piñeiro
parent 61ea64c8c1
commit 7565fcaab0
2 changed files with 90 additions and 2 deletions
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79
clutter/cally/cally-text.c
View File

@ -134,6 +134,13 @@ static AtkAttributeSet* cally_text_get_run_attributes (AtkText *text,
gint *start_offset,
gint *end_offset);
static AtkAttributeSet* cally_text_get_default_attributes (AtkText *text);
static void cally_text_get_character_extents (AtkText *text,
gint offset,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coords);
static void _cally_text_get_selection_bounds (ClutterText *clutter_text,
gint *start_offset,
gint *end_offset);
@ -398,7 +405,7 @@ cally_text_text_interface_init (AtkTextIface *iface)
iface->set_selection = cally_text_set_selection;
iface->get_run_attributes = cally_text_get_run_attributes;
iface->get_default_attributes = cally_text_get_default_attributes;
/* iface->get_character_extents = */
iface->get_character_extents = cally_text_get_character_extents;
/* iface->get_offset_at_point = */
}
@ -779,6 +786,76 @@ cally_text_get_default_attributes (AtkText *text)
return at_set;
}
static void cally_text_get_character_extents (AtkText *text,
gint offset,
gint *xp,
gint *yp,
gint *widthp,
gint *heightp,
AtkCoordType coords)
{
ClutterActor *actor = NULL;
ClutterText *clutter_text = NULL;
gint x = 0, y = 0, width = 0, height = 0;
gint index, x_window, y_window, x_toplevel, y_toplevel;
gint x_layout, y_layout;
PangoLayout *layout;
PangoRectangle extents;
const gchar *text_value;
ClutterVertex verts[4];
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
goto done;
clutter_text = CLUTTER_TEXT (actor);
text_value = clutter_text_get_text (clutter_text);
index = g_utf8_offset_to_pointer (text_value, offset) - text_value;
layout = clutter_text_get_layout (clutter_text);
pango_layout_index_to_pos (layout, index, &extents);
/* handle RTL text layout */
if (extents.width < 0)
{
extents.x += extents.width;
extents.width = -extents.width;
}
clutter_actor_get_abs_allocation_vertices (actor, verts);
x_window = verts[0].x;
y_window = verts[0].y;
clutter_text_get_layout_offsets (clutter_text, &x_layout, &y_layout);
x = (extents.x / PANGO_SCALE) + x_layout + x_window;
y = (extents.y / PANGO_SCALE) + y_layout + y_window;
width = extents.width / PANGO_SCALE;
height = extents.height / PANGO_SCALE;
if (coords == ATK_XY_SCREEN)
{
_cally_actor_get_top_level_origin (actor, &x_toplevel, &y_toplevel);
x += x_toplevel;
y += y_toplevel;
}
done:
if (widthp)
*widthp = width;
if (heightp)
*heightp = height;
if (xp)
*xp = x;
if (yp)
*yp = y;
}
/******** Auxiliar private methods ******/
/* ClutterText only maintains the current cursor position and a extra selection

13
tests/accessibility/cally-atktext-example.c
View File

@ -49,6 +49,7 @@ test_atk_text (ClutterActor *actor)
AtkAttributeSet *at_set = NULL;
GSList *attrs;
gchar *buf;
gint x, y, width, height;
object = atk_gobject_accessible_for_object (G_OBJECT (actor));
cally_text = ATK_TEXT (object);
@ -124,6 +125,16 @@ test_atk_text (ClutterActor *actor)
attrs = g_slist_next (attrs);
}
atk_text_get_character_extents (cally_text, 0, &x, &y, &width, &height,
ATK_XY_WINDOW);
g_print ("atk_text_get_character_extents (0, window): x=%i y=%i width=%i height=%i\n",
x, y, width, height);
atk_text_get_character_extents (cally_text, 0, &x, &y, &width, &height,
ATK_XY_SCREEN);
g_print ("atk_text_get_character_extents (0, screen): x=%i y=%i width=%i height=%i\n",
x, y, width, height);
}
static void
@ -192,7 +203,7 @@ make_ui (ClutterActor *stage)
text_editable_actor = clutter_text_new_full ("Sans Bold 32px",
"consectetur adipisicing elit",
&color_text);
clutter_actor_set_position (text_editable_actor, 0, 100);
clutter_actor_set_position (text_editable_actor, 20, 100);
clutter_text_set_editable (CLUTTER_TEXT (text_editable_actor), TRUE);
clutter_text_set_selectable (CLUTTER_TEXT (text_editable_actor), TRUE);
clutter_text_set_selection_color (CLUTTER_TEXT (text_editable_actor),