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a11y: cally-text get_offset_at_point 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 12:58:47 +01:00 committed by Alejandro Piñeiro
parent 7565fcaab0
commit eb28d16300
2 changed files with 88 additions and 1 deletions
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83
clutter/cally/cally-text.c
View File

@ -141,6 +141,11 @@ static void cally_text_get_character_extents (AtkText *text,
gint *width,
gint *height,
AtkCoordType coords);
static gint cally_text_get_offset_at_point (AtkText *text,
gint x,
gint y,
AtkCoordType coords);
static void _cally_text_get_selection_bounds (ClutterText *clutter_text,
gint *start_offset,
gint *end_offset);
@ -190,6 +195,11 @@ static AtkAttributeSet* _cally_misc_layout_get_run_attributes (AtkAttributeS
static AtkAttributeSet* _cally_misc_layout_get_default_attributes (AtkAttributeSet *attrib_set,
ClutterText *text);
static int _cally_misc_get_index_at_point (ClutterText *clutter_text,
gint x,
gint y,
AtkCoordType coords);
G_DEFINE_TYPE_WITH_CODE (CallyText,
cally_text,
CALLY_TYPE_ACTOR,
@ -406,7 +416,7 @@ cally_text_text_interface_init (AtkTextIface *iface)
iface->get_run_attributes = cally_text_get_run_attributes;
iface->get_default_attributes = cally_text_get_default_attributes;
iface->get_character_extents = cally_text_get_character_extents;
/* iface->get_offset_at_point = */
iface->get_offset_at_point = cally_text_get_offset_at_point;
}
@ -855,6 +865,31 @@ done:
*yp = y;
}
static gint
cally_text_get_offset_at_point (AtkText *text,
gint x,
gint y,
AtkCoordType coords)
{
ClutterActor *actor = NULL;
ClutterText *clutter_text = NULL;
const gchar *text_value;
gint index;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return -1;
clutter_text = CLUTTER_TEXT (actor);
index = _cally_misc_get_index_at_point (clutter_text, x, y, coords);
text_value = clutter_text_get_text (clutter_text);
if (index == -1)
return g_utf8_strlen (text_value, -1);
else
return g_utf8_pointer_to_offset (text_value, text_value + index);
}
/******** Auxiliar private methods ******/
@ -1617,3 +1652,49 @@ _cally_misc_layout_get_default_attributes (AtkAttributeSet *attrib_set,
return attrib_set;
}
static int
_cally_misc_get_index_at_point (ClutterText *clutter_text,
gint x,
gint y,
AtkCoordType coords)
{
gint index, x_window, y_window, x_toplevel, y_toplevel;
gint x_temp, y_temp;
gboolean ret;
ClutterVertex verts[4];
PangoLayout *layout;
gint x_layout, y_layout;
clutter_text_get_layout_offsets (clutter_text, &x_layout, &y_layout);
clutter_actor_get_abs_allocation_vertices (CLUTTER_ACTOR (clutter_text), verts);
x_window = verts[0].x;
y_window = verts[0].y;
x_temp = x - x_layout - x_window;
y_temp = y - y_layout - y_window;
if (coords == ATK_XY_SCREEN)
{
_cally_actor_get_top_level_origin (CLUTTER_ACTOR (clutter_text), &x_toplevel,
&y_toplevel);
x_temp -= x_toplevel;
y_temp -= y_toplevel;
}
layout = clutter_text_get_layout (clutter_text);
ret = pango_layout_xy_to_index (layout,
x_temp * PANGO_SCALE,
y_temp * PANGO_SCALE,
&index, NULL);
if (!ret)
{
if (x_temp < 0 || y_temp < 0)
index = 0;
else
index = -1;
}
return index;
}

6
tests/accessibility/cally-atktext-example.c
View File

@ -135,6 +135,12 @@ test_atk_text (ClutterActor *actor)
g_print ("atk_text_get_character_extents (0, screen): x=%i y=%i width=%i height=%i\n",
x, y, width, height);
pos = atk_text_get_offset_at_point (cally_text, 200, 10, ATK_XY_WINDOW);
g_print ("atk_text_get_offset_at_point (200, 10, window): %i\n", pos);
pos = atk_text_get_offset_at_point (cally_text, 200, 100, ATK_XY_SCREEN);
g_print ("atk_text_get_offset_at_point (200, 100, screen): %i\n", pos);
}
static void