/* GAIL - The GNOME Accessibility Implementation Library * Copyright 2001, 2002, 2003 Sun Microsystems Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include "config.h" #include #include #include #include "gailbutton.h" #include #define GAIL_BUTTON_ATTACHED_MENUS "gtk-attached-menus" static void gail_button_class_init (GailButtonClass *klass); static void gail_button_init (GailButton *button); static G_CONST_RETURN gchar* gail_button_get_name (AtkObject *obj); static gint gail_button_get_n_children (AtkObject *obj); static AtkObject* gail_button_ref_child (AtkObject *obj, gint i); static AtkStateSet* gail_button_ref_state_set (AtkObject *obj); static void gail_button_notify_label_gtk (GObject *obj, GParamSpec *pspec, gpointer data); static void gail_button_label_map_gtk (GtkWidget *widget, gpointer data); static void gail_button_real_initialize (AtkObject *obj, gpointer data); static void gail_button_finalize (GObject *object); static void gail_button_init_textutil (GailButton *button, GtkWidget *label); static void gail_button_pressed_enter_handler (GtkWidget *widget); static void gail_button_released_leave_handler (GtkWidget *widget); static gint gail_button_real_add_gtk (GtkContainer *container, GtkWidget *widget, gpointer data); static void atk_action_interface_init (AtkActionIface *iface); static gboolean gail_button_do_action (AtkAction *action, gint i); static gboolean idle_do_action (gpointer data); static gint gail_button_get_n_actions (AtkAction *action); static G_CONST_RETURN gchar* gail_button_get_description(AtkAction *action, gint i); static G_CONST_RETURN gchar* gail_button_get_keybinding (AtkAction *action, gint i); static G_CONST_RETURN gchar* gail_button_action_get_name(AtkAction *action, gint i); static gboolean gail_button_set_description(AtkAction *action, gint i, const gchar *desc); static void gail_button_notify_label_weak_ref (gpointer data, GObject *obj); static void gail_button_notify_weak_ref (gpointer data, GObject *obj); /* AtkImage.h */ static void atk_image_interface_init (AtkImageIface *iface); static G_CONST_RETURN gchar* gail_button_get_image_description (AtkImage *image); static void gail_button_get_image_position (AtkImage *image, gint *x, gint *y, AtkCoordType coord_type); static void gail_button_get_image_size (AtkImage *image, gint *width, gint *height); static gboolean gail_button_set_image_description (AtkImage *image, const gchar *description); /* atktext.h */ static void atk_text_interface_init (AtkTextIface *iface); static gchar* gail_button_get_text (AtkText *text, gint start_pos, gint end_pos); static gunichar gail_button_get_character_at_offset(AtkText *text, gint offset); static gchar* gail_button_get_text_before_offset(AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset); static gchar* gail_button_get_text_at_offset (AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset); static gchar* gail_button_get_text_after_offset(AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset); static gint gail_button_get_character_count (AtkText *text); static void gail_button_get_character_extents (AtkText *text, gint offset, gint *x, gint *y, gint *width, gint *height, AtkCoordType coords); static gint gail_button_get_offset_at_point (AtkText *text, gint x, gint y, AtkCoordType coords); static AtkAttributeSet* gail_button_get_run_attributes (AtkText *text, gint offset, gint *start_offset, gint *end_offset); static AtkAttributeSet* gail_button_get_default_attributes (AtkText *text); static GtkImage* get_image_from_button (GtkWidget *button); static GtkWidget* get_label_from_button (GtkWidget *button, gint index, gboolean allow_many); static gint get_n_labels_from_button (GtkWidget *button); static void set_role_for_button (AtkObject *accessible, GtkWidget *button); static gint get_n_attached_menus (GtkWidget *widget); static GtkWidget* get_nth_attached_menu (GtkWidget *widget, gint index); G_DEFINE_TYPE_WITH_CODE (GailButton, gail_button, GAIL_TYPE_CONTAINER, G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init) G_IMPLEMENT_INTERFACE (ATK_TYPE_IMAGE, atk_image_interface_init) G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, atk_text_interface_init)) static void gail_button_class_init (GailButtonClass *klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); AtkObjectClass *class = ATK_OBJECT_CLASS (klass); GailContainerClass *container_class; container_class = (GailContainerClass*)klass; gobject_class->finalize = gail_button_finalize; class->get_name = gail_button_get_name; class->get_n_children = gail_button_get_n_children; class->ref_child = gail_button_ref_child; class->ref_state_set = gail_button_ref_state_set; class->initialize = gail_button_real_initialize; container_class->add_gtk = gail_button_real_add_gtk; container_class->remove_gtk = NULL; } static void gail_button_init (GailButton *button) { button->click_description = NULL; button->press_description = NULL; button->release_description = NULL; button->click_keybinding = NULL; button->action_queue = NULL; button->action_idle_handler = 0; button->textutil = NULL; } static G_CONST_RETURN gchar* gail_button_get_name (AtkObject *obj) { G_CONST_RETURN gchar* name = NULL; g_return_val_if_fail (GAIL_IS_BUTTON (obj), NULL); name = ATK_OBJECT_CLASS (gail_button_parent_class)->get_name (obj); if (name == NULL) { /* * Get the text on the label */ GtkWidget *widget; GtkWidget *child; widget = GTK_ACCESSIBLE (obj)->widget; if (widget == NULL) /* * State is defunct */ return NULL; g_return_val_if_fail (GTK_IS_BUTTON (widget), NULL); child = get_label_from_button (widget, 0, FALSE); if (GTK_IS_LABEL (child)) name = gtk_label_get_text (GTK_LABEL (child)); else { GtkImage *image; image = get_image_from_button (widget); if (GTK_IS_IMAGE (image)) { AtkObject *atk_obj; atk_obj = gtk_widget_get_accessible (GTK_WIDGET (image)); name = atk_object_get_name (atk_obj); } } } return name; } /* * A DownArrow in a GtkToggltButton whose parent is not a ColorCombo * has press as default action. */ static gboolean gail_button_is_default_press (GtkWidget *widget) { GtkWidget *child; GtkWidget *parent; gboolean ret = FALSE; const gchar *parent_type_name; child = GTK_BIN (widget)->child; if (GTK_IS_ARROW (child) && GTK_ARROW (child)->arrow_type == GTK_ARROW_DOWN) { parent = gtk_widget_get_parent (widget); if (parent) { parent_type_name = g_type_name (G_OBJECT_TYPE (parent)); if (strcmp (parent_type_name, "ColorCombo")) return TRUE; } } return ret; } static void gail_button_real_initialize (AtkObject *obj, gpointer data) { GailButton *button = GAIL_BUTTON (obj); GtkWidget *label; GtkWidget *widget; ATK_OBJECT_CLASS (gail_button_parent_class)->initialize (obj, data); button->state = GTK_STATE_NORMAL; g_signal_connect (data, "pressed", G_CALLBACK (gail_button_pressed_enter_handler), NULL); g_signal_connect (data, "enter", G_CALLBACK (gail_button_pressed_enter_handler), NULL); g_signal_connect (data, "released", G_CALLBACK (gail_button_released_leave_handler), NULL); g_signal_connect (data, "leave", G_CALLBACK (gail_button_released_leave_handler), NULL); widget = GTK_WIDGET (data); label = get_label_from_button (widget, 0, FALSE); if (GTK_IS_LABEL (label)) { if (GTK_WIDGET_MAPPED (label)) gail_button_init_textutil (button, label); else g_signal_connect (label, "map", G_CALLBACK (gail_button_label_map_gtk), button); } button->default_is_press = gail_button_is_default_press (widget); set_role_for_button (obj, data); } static void gail_button_label_map_gtk (GtkWidget *widget, gpointer data) { GailButton *button; button = GAIL_BUTTON (data); gail_button_init_textutil (button, widget); } static void gail_button_notify_label_gtk (GObject *obj, GParamSpec *pspec, gpointer data) { AtkObject* atk_obj = ATK_OBJECT (data); GtkLabel *label; GailButton *gail_button; if (strcmp (pspec->name, "label") == 0) { const gchar* label_text; label = GTK_LABEL (obj); label_text = gtk_label_get_text (label); gail_button = GAIL_BUTTON (atk_obj); gail_text_util_text_setup (gail_button->textutil, label_text); if (atk_obj->name == NULL) { /* * The label has changed so notify a change in accessible-name */ g_object_notify (G_OBJECT (atk_obj), "accessible-name"); } /* * The label is the only property which can be changed */ g_signal_emit_by_name (atk_obj, "visible_data_changed"); } } static void gail_button_notify_weak_ref (gpointer data, GObject* obj) { GtkLabel *label = NULL; AtkObject* atk_obj = ATK_OBJECT (obj); if (data && GTK_IS_WIDGET (data)) { label = GTK_LABEL (data); if (label) { g_signal_handlers_disconnect_by_func (label, (GCallback) gail_button_notify_label_gtk, GAIL_BUTTON (atk_obj)); g_object_weak_unref (G_OBJECT (label), gail_button_notify_label_weak_ref, GAIL_BUTTON (atk_obj)); } } } static void gail_button_notify_label_weak_ref (gpointer data, GObject* obj) { GtkLabel *label = NULL; GailButton *button = NULL; label = GTK_LABEL (obj); if (data && GAIL_IS_BUTTON (data)) { button = GAIL_BUTTON (ATK_OBJECT (data)); if (button) g_object_weak_unref (G_OBJECT (button), gail_button_notify_weak_ref, label); } } static void gail_button_init_textutil (GailButton *button, GtkWidget *label) { const gchar *label_text; if (button->textutil) g_object_unref (button->textutil); button->textutil = gail_text_util_new (); label_text = gtk_label_get_text (GTK_LABEL (label)); gail_text_util_text_setup (button->textutil, label_text); g_object_weak_ref (G_OBJECT (button), gail_button_notify_weak_ref, label); g_object_weak_ref (G_OBJECT (label), gail_button_notify_label_weak_ref, button); g_signal_connect (label, "notify", (GCallback) gail_button_notify_label_gtk, button); } static gint gail_button_real_add_gtk (GtkContainer *container, GtkWidget *widget, gpointer data) { GtkLabel *label; GailButton *button; if (GTK_IS_LABEL (widget)) { const gchar* label_text; label = GTK_LABEL (widget); button = GAIL_BUTTON (data); if (!button->textutil) gail_button_init_textutil (button, widget); else { label_text = gtk_label_get_text (label); gail_text_util_text_setup (button->textutil, label_text); } } return 1; } static void atk_action_interface_init (AtkActionIface *iface) { iface->do_action = gail_button_do_action; iface->get_n_actions = gail_button_get_n_actions; iface->get_description = gail_button_get_description; iface->get_keybinding = gail_button_get_keybinding; iface->get_name = gail_button_action_get_name; iface->set_description = gail_button_set_description; } static gboolean gail_button_do_action (AtkAction *action, gint i) { GtkWidget *widget; GailButton *button; gboolean return_value = TRUE; widget = GTK_ACCESSIBLE (action)->widget; if (widget == NULL) /* * State is defunct */ return FALSE; if (!GTK_WIDGET_IS_SENSITIVE (widget) || !GTK_WIDGET_VISIBLE (widget)) return FALSE; button = GAIL_BUTTON (action); switch (i) { case 0: case 1: case 2: if (!button->action_queue) { button->action_queue = g_queue_new (); } g_queue_push_head (button->action_queue, GINT_TO_POINTER(i)); if (!button->action_idle_handler) button->action_idle_handler = gdk_threads_add_idle (idle_do_action, button); break; default: return_value = FALSE; break; } return return_value; } static gboolean idle_do_action (gpointer data) { GtkButton *button; GtkWidget *widget; GailButton *gail_button; GdkEvent tmp_event; gail_button = GAIL_BUTTON (data); gail_button->action_idle_handler = 0; widget = GTK_ACCESSIBLE (gail_button)->widget; tmp_event.button.type = GDK_BUTTON_RELEASE; tmp_event.button.window = widget->window; tmp_event.button.button = 1; tmp_event.button.send_event = TRUE; tmp_event.button.time = GDK_CURRENT_TIME; tmp_event.button.axes = NULL; g_object_ref (gail_button); if (widget == NULL /* State is defunct */ || !GTK_WIDGET_IS_SENSITIVE (widget) || !GTK_WIDGET_VISIBLE (widget)) { g_object_unref (gail_button); return FALSE; } else gtk_widget_event (widget, &tmp_event); button = GTK_BUTTON (widget); while (!g_queue_is_empty (gail_button->action_queue)) { gint action_number = GPOINTER_TO_INT(g_queue_pop_head (gail_button->action_queue)); if (gail_button->default_is_press) { if (action_number == 0) action_number = 1; else if (action_number == 1) action_number = 0; } switch (action_number) { case 0: /* first a press */ button->in_button = TRUE; g_signal_emit_by_name (button, "enter"); /* * Simulate a button press event. calling gtk_button_pressed() does * not get the job done for a GtkOptionMenu. */ tmp_event.button.type = GDK_BUTTON_PRESS; tmp_event.button.window = widget->window; tmp_event.button.button = 1; tmp_event.button.send_event = TRUE; tmp_event.button.time = GDK_CURRENT_TIME; tmp_event.button.axes = NULL; gtk_widget_event (widget, &tmp_event); /* then a release */ tmp_event.button.type = GDK_BUTTON_RELEASE; gtk_widget_event (widget, &tmp_event); button->in_button = FALSE; g_signal_emit_by_name (button, "leave"); break; case 1: button->in_button = TRUE; g_signal_emit_by_name (button, "enter"); /* * Simulate a button press event. calling gtk_button_pressed() does * not get the job done for a GtkOptionMenu. */ tmp_event.button.type = GDK_BUTTON_PRESS; tmp_event.button.window = widget->window; tmp_event.button.button = 1; tmp_event.button.send_event = TRUE; tmp_event.button.time = GDK_CURRENT_TIME; tmp_event.button.axes = NULL; gtk_widget_event (widget, &tmp_event); break; case 2: button->in_button = FALSE; g_signal_emit_by_name (button, "leave"); break; default: g_assert_not_reached (); break; } } g_object_unref (gail_button); return FALSE; } static gint gail_button_get_n_actions (AtkAction *action) { return 3; } static G_CONST_RETURN gchar* gail_button_get_description (AtkAction *action, gint i) { GailButton *button; G_CONST_RETURN gchar *return_value; button = GAIL_BUTTON (action); if (button->default_is_press) { if (i == 0) i = 1; else if (i == 1) i = 0; } switch (i) { case 0: return_value = button->click_description; break; case 1: return_value = button->press_description; break; case 2: return_value = button->release_description; break; default: return_value = NULL; break; } return return_value; } static G_CONST_RETURN gchar* gail_button_get_keybinding (AtkAction *action, gint i) { GailButton *button; gchar *return_value = NULL; button = GAIL_BUTTON (action); if (button->default_is_press) { if (i == 0) i = 1; else if (i == 1) i = 0; } switch (i) { case 0: { /* * We look for a mnemonic on the label */ GtkWidget *widget; GtkWidget *label; guint key_val; widget = GTK_ACCESSIBLE (button)->widget; if (widget == NULL) /* * State is defunct */ return NULL; g_return_val_if_fail (GTK_IS_BUTTON (widget), NULL); label = get_label_from_button (widget, 0, FALSE); if (GTK_IS_LABEL (label)) { key_val = gtk_label_get_mnemonic_keyval (GTK_LABEL (label)); if (key_val != GDK_VoidSymbol) return_value = gtk_accelerator_name (key_val, GDK_MOD1_MASK); } if (return_value == NULL) { /* Find labelled-by relation */ AtkRelationSet *set; AtkRelation *relation; GPtrArray *target; gpointer target_object; set = atk_object_ref_relation_set (ATK_OBJECT (action)); if (set) { relation = atk_relation_set_get_relation_by_type (set, ATK_RELATION_LABELLED_BY); if (relation) { target = atk_relation_get_target (relation); target_object = g_ptr_array_index (target, 0); if (GTK_IS_ACCESSIBLE (target_object)) { label = GTK_ACCESSIBLE (target_object)->widget; } } g_object_unref (set); } if (GTK_IS_LABEL (label)) { key_val = gtk_label_get_mnemonic_keyval (GTK_LABEL (label)); if (key_val != GDK_VoidSymbol) return_value = gtk_accelerator_name (key_val, GDK_MOD1_MASK); } } g_free (button->click_keybinding); button->click_keybinding = return_value; break; } default: break; } return return_value; } static G_CONST_RETURN gchar* gail_button_action_get_name (AtkAction *action, gint i) { G_CONST_RETURN gchar *return_value; GailButton *button; button = GAIL_BUTTON (action); if (button->default_is_press) { if (i == 0) i = 1; else if (i == 1) i = 0; } switch (i) { case 0: /* * This action is a "click" to activate a button or "toggle" to change * the state of a toggle button check box or radio button. */ return_value = "click"; break; case 1: /* * This action simulates a button press by simulating moving the * mouse into the button followed by pressing the left mouse button. */ return_value = "press"; break; case 2: /* * This action simulates releasing the left mouse button outside the * button. * * To simulate releasing the left mouse button inside the button use * the click action. */ return_value = "release"; break; default: return_value = NULL; break; } return return_value; } static gboolean gail_button_set_description (AtkAction *action, gint i, const gchar *desc) { GailButton *button; gchar **value; button = GAIL_BUTTON (action); if (button->default_is_press) { if (i == 0) i = 1; else if (i == 1) i = 0; } switch (i) { case 0: value = &button->click_description; break; case 1: value = &button->press_description; break; case 2: value = &button->release_description; break; default: value = NULL; break; } if (value) { g_free (*value); *value = g_strdup (desc); return TRUE; } else return FALSE; } static gint gail_button_get_n_children (AtkObject* obj) { GtkWidget *widget; gint n_children; g_return_val_if_fail (GAIL_IS_BUTTON (obj), 0); widget = GTK_ACCESSIBLE (obj)->widget; if (widget == NULL) /* * State is defunct */ return 0; /* * Check whether we have an attached menus for PanelMenuButton */ n_children = get_n_attached_menus (widget); if (n_children > 0) return n_children; n_children = get_n_labels_from_button (widget); if (n_children <= 1) n_children = 0; return n_children; } static AtkObject* gail_button_ref_child (AtkObject *obj, gint i) { GtkWidget *widget; GtkWidget *child_widget; AtkObject *child; g_return_val_if_fail (GAIL_IS_BUTTON (obj), NULL); widget = GTK_ACCESSIBLE (obj)->widget; if (widget == NULL) /* * State is defunct */ return NULL; if (i >= gail_button_get_n_children (obj)) return NULL; if (get_n_attached_menus (widget) > 0) { child_widget = get_nth_attached_menu (widget, i); } else child_widget = NULL; if (!child_widget) { if (get_n_labels_from_button (widget) > 1) { child_widget = get_label_from_button (widget, i, TRUE); } } if (child_widget) { child = gtk_widget_get_accessible (child_widget); g_object_ref (child); } else child = NULL; return child; } static AtkStateSet* gail_button_ref_state_set (AtkObject *obj) { AtkStateSet *state_set; GtkWidget *widget; state_set = ATK_OBJECT_CLASS (gail_button_parent_class)->ref_state_set (obj); widget = GTK_ACCESSIBLE (obj)->widget; if (widget == NULL) return state_set; if (GTK_WIDGET_STATE (widget) == GTK_STATE_ACTIVE) atk_state_set_add_state (state_set, ATK_STATE_ARMED); if (!GTK_WIDGET_CAN_FOCUS(widget)) atk_state_set_remove_state (state_set, ATK_STATE_SELECTABLE); return state_set; } /* * This is the signal handler for the "pressed" or "enter" signal handler * on the GtkButton. * * If the state is now GTK_STATE_ACTIVE we notify a property change */ static void gail_button_pressed_enter_handler (GtkWidget *widget) { AtkObject *accessible; if (GTK_WIDGET_STATE (widget) == GTK_STATE_ACTIVE) { accessible = gtk_widget_get_accessible (widget); atk_object_notify_state_change (accessible, ATK_STATE_ARMED, TRUE); GAIL_BUTTON (accessible)->state = GTK_STATE_ACTIVE; } } /* * This is the signal handler for the "released" or "leave" signal handler * on the GtkButton. * * If the state was GTK_STATE_ACTIVE we notify a property change */ static void gail_button_released_leave_handler (GtkWidget *widget) { AtkObject *accessible; accessible = gtk_widget_get_accessible (widget); if (GAIL_BUTTON (accessible)->state == GTK_STATE_ACTIVE) { atk_object_notify_state_change (accessible, ATK_STATE_ARMED, FALSE); GAIL_BUTTON (accessible)->state = GTK_STATE_NORMAL; } } static void atk_image_interface_init (AtkImageIface *iface) { iface->get_image_description = gail_button_get_image_description; iface->get_image_position = gail_button_get_image_position; iface->get_image_size = gail_button_get_image_size; iface->set_image_description = gail_button_set_image_description; } static GtkImage* get_image_from_button (GtkWidget *button) { GtkWidget *child; GList *list; GtkImage *image = NULL; child = gtk_bin_get_child (GTK_BIN (button)); if (GTK_IS_IMAGE (child)) image = GTK_IMAGE (child); else { if (GTK_IS_ALIGNMENT (child)) child = gtk_bin_get_child (GTK_BIN (child)); if (GTK_IS_CONTAINER (child)) { list = gtk_container_get_children (GTK_CONTAINER (child)); if (!list) return NULL; if (GTK_IS_IMAGE (list->data)) image = GTK_IMAGE (list->data); g_list_free (list); } } return image; } static G_CONST_RETURN gchar* gail_button_get_image_description (AtkImage *image) { GtkWidget *widget; GtkImage *button_image; AtkObject *obj; widget = GTK_ACCESSIBLE (image)->widget; if (widget == NULL) /* * State is defunct */ return NULL; button_image = get_image_from_button (widget); if (button_image != NULL) { obj = gtk_widget_get_accessible (GTK_WIDGET (button_image)); return atk_image_get_image_description (ATK_IMAGE (obj)); } else return NULL; } static void gail_button_get_image_position (AtkImage *image, gint *x, gint *y, AtkCoordType coord_type) { GtkWidget *widget; GtkImage *button_image; AtkObject *obj; widget = GTK_ACCESSIBLE (image)->widget; if (widget == NULL) { /* * State is defunct */ *x = G_MININT; *y = G_MININT; return; } button_image = get_image_from_button (widget); if (button_image != NULL) { obj = gtk_widget_get_accessible (GTK_WIDGET (button_image)); atk_component_get_position (ATK_COMPONENT (obj), x, y, coord_type); } else { *x = G_MININT; *y = G_MININT; } } static void gail_button_get_image_size (AtkImage *image, gint *width, gint *height) { GtkWidget *widget; GtkImage *button_image; AtkObject *obj; widget = GTK_ACCESSIBLE (image)->widget; if (widget == NULL) { /* * State is defunct */ *width = -1; *height = -1; return; } button_image = get_image_from_button (widget); if (button_image != NULL) { obj = gtk_widget_get_accessible (GTK_WIDGET (button_image)); atk_image_get_image_size (ATK_IMAGE (obj), width, height); } else { *width = -1; *height = -1; } } static gboolean gail_button_set_image_description (AtkImage *image, const gchar *description) { GtkWidget *widget; GtkImage *button_image; AtkObject *obj; widget = GTK_ACCESSIBLE (image)->widget; if (widget == NULL) /* * State is defunct */ return FALSE; button_image = get_image_from_button (widget); if (button_image != NULL) { obj = gtk_widget_get_accessible (GTK_WIDGET (button_image)); return atk_image_set_image_description (ATK_IMAGE (obj), description); } else return FALSE; } /* atktext.h */ static void atk_text_interface_init (AtkTextIface *iface) { iface->get_text = gail_button_get_text; iface->get_character_at_offset = gail_button_get_character_at_offset; iface->get_text_before_offset = gail_button_get_text_before_offset; iface->get_text_at_offset = gail_button_get_text_at_offset; iface->get_text_after_offset = gail_button_get_text_after_offset; iface->get_character_count = gail_button_get_character_count; iface->get_character_extents = gail_button_get_character_extents; iface->get_offset_at_point = gail_button_get_offset_at_point; iface->get_run_attributes = gail_button_get_run_attributes; iface->get_default_attributes = gail_button_get_default_attributes; } static gchar* gail_button_get_text (AtkText *text, gint start_pos, gint end_pos) { GtkWidget *widget; GtkWidget *label; GailButton *button; const gchar *label_text; widget = GTK_ACCESSIBLE (text)->widget; if (widget == NULL) /* State is defunct */ return NULL; label = get_label_from_button (widget, 0, FALSE); if (!GTK_IS_LABEL (label)) return NULL; button = GAIL_BUTTON (text); if (!button->textutil) gail_button_init_textutil (button, label); label_text = gtk_label_get_text (GTK_LABEL (label)); if (label_text == NULL) return NULL; else { return gail_text_util_get_substring (button->textutil, start_pos, end_pos); } } static gchar* gail_button_get_text_before_offset (AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset) { GtkWidget *widget; GtkWidget *label; GailButton *button; widget = GTK_ACCESSIBLE (text)->widget; if (widget == NULL) /* State is defunct */ return NULL; /* Get label */ label = get_label_from_button (widget, 0, FALSE); if (!GTK_IS_LABEL(label)) return NULL; button = GAIL_BUTTON (text); if (!button->textutil) gail_button_init_textutil (button, label); return gail_text_util_get_text (button->textutil, gtk_label_get_layout (GTK_LABEL (label)), GAIL_BEFORE_OFFSET, boundary_type, offset, start_offset, end_offset); } static gchar* gail_button_get_text_at_offset (AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset) { GtkWidget *widget; GtkWidget *label; GailButton *button; widget = GTK_ACCESSIBLE (text)->widget; if (widget == NULL) /* State is defunct */ return NULL; /* Get label */ label = get_label_from_button (widget, 0, FALSE); if (!GTK_IS_LABEL(label)) return NULL; button = GAIL_BUTTON (text); if (!button->textutil) gail_button_init_textutil (button, label); return gail_text_util_get_text (button->textutil, gtk_label_get_layout (GTK_LABEL (label)), GAIL_AT_OFFSET, boundary_type, offset, start_offset, end_offset); } static gchar* gail_button_get_text_after_offset (AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset) { GtkWidget *widget; GtkWidget *label; GailButton *button; widget = GTK_ACCESSIBLE (text)->widget; if (widget == NULL) { /* State is defunct */ return NULL; } /* Get label */ label = get_label_from_button (widget, 0, FALSE); if (!GTK_IS_LABEL(label)) return NULL; button = GAIL_BUTTON (text); if (!button->textutil) gail_button_init_textutil (button, label); return gail_text_util_get_text (button->textutil, gtk_label_get_layout (GTK_LABEL (label)), GAIL_AFTER_OFFSET, boundary_type, offset, start_offset, end_offset); } static gint gail_button_get_character_count (AtkText *text) { GtkWidget *widget; GtkWidget *label; widget = GTK_ACCESSIBLE (text)->widget; if (widget == NULL) /* State is defunct */ return 0; label = get_label_from_button (widget, 0, FALSE); if (!GTK_IS_LABEL(label)) return 0; return g_utf8_strlen (gtk_label_get_text (GTK_LABEL (label)), -1); } static void gail_button_get_character_extents (AtkText *text, gint offset, gint *x, gint *y, gint *width, gint *height, AtkCoordType coords) { GtkWidget *widget; GtkWidget *label; PangoRectangle char_rect; gint index, x_layout, y_layout; const gchar *label_text; widget = GTK_ACCESSIBLE (text)->widget; if (widget == NULL) /* State is defunct */ return; label = get_label_from_button (widget, 0, FALSE); if (!GTK_IS_LABEL(label)) return; gtk_label_get_layout_offsets (GTK_LABEL (label), &x_layout, &y_layout); label_text = gtk_label_get_text (GTK_LABEL (label)); index = g_utf8_offset_to_pointer (label_text, offset) - label_text; pango_layout_index_to_pos (gtk_label_get_layout (GTK_LABEL (label)), index, &char_rect); gail_misc_get_extents_from_pango_rectangle (label, &char_rect, x_layout, y_layout, x, y, width, height, coords); } static gint gail_button_get_offset_at_point (AtkText *text, gint x, gint y, AtkCoordType coords) { GtkWidget *widget; GtkWidget *label; gint index, x_layout, y_layout; const gchar *label_text; widget = GTK_ACCESSIBLE (text)->widget; if (widget == NULL) /* State is defunct */ return -1; label = get_label_from_button (widget, 0, FALSE); if (!GTK_IS_LABEL(label)) return -1; gtk_label_get_layout_offsets (GTK_LABEL (label), &x_layout, &y_layout); index = gail_misc_get_index_at_point_in_layout (label, gtk_label_get_layout (GTK_LABEL (label)), x_layout, y_layout, x, y, coords); label_text = gtk_label_get_text (GTK_LABEL (label)); if (index == -1) { if (coords == ATK_XY_WINDOW || coords == ATK_XY_SCREEN) return g_utf8_strlen (label_text, -1); return index; } else return g_utf8_pointer_to_offset (label_text, label_text + index); } static AtkAttributeSet* gail_button_get_run_attributes (AtkText *text, gint offset, gint *start_offset, gint *end_offset) { GtkWidget *widget; GtkWidget *label; AtkAttributeSet *at_set = NULL; GtkJustification justify; GtkTextDirection dir; widget = GTK_ACCESSIBLE (text)->widget; if (widget == NULL) /* State is defunct */ return NULL; label = get_label_from_button (widget, 0, FALSE); if (!GTK_IS_LABEL(label)) return NULL; /* Get values set for entire label, if any */ justify = gtk_label_get_justify (GTK_LABEL (label)); if (justify != GTK_JUSTIFY_CENTER) { at_set = gail_misc_add_attribute (at_set, ATK_TEXT_ATTR_JUSTIFICATION, g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_JUSTIFICATION, justify))); } dir = gtk_widget_get_direction (label); if (dir == GTK_TEXT_DIR_RTL) { at_set = gail_misc_add_attribute (at_set, ATK_TEXT_ATTR_DIRECTION, g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_DIRECTION, dir))); } at_set = gail_misc_layout_get_run_attributes (at_set, gtk_label_get_layout (GTK_LABEL (label)), (gchar *) gtk_label_get_text (GTK_LABEL (label)), offset, start_offset, end_offset); return at_set; } static AtkAttributeSet* gail_button_get_default_attributes (AtkText *text) { GtkWidget *widget; GtkWidget *label; AtkAttributeSet *at_set = NULL; widget = GTK_ACCESSIBLE (text)->widget; if (widget == NULL) /* State is defunct */ return NULL; label = get_label_from_button (widget, 0, FALSE); if (!GTK_IS_LABEL(label)) return NULL; at_set = gail_misc_get_default_attributes (at_set, gtk_label_get_layout (GTK_LABEL (label)), widget); return at_set; } static gunichar gail_button_get_character_at_offset (AtkText *text, gint offset) { GtkWidget *widget; GtkWidget *label; const gchar *string; gchar *index; widget = GTK_ACCESSIBLE (text)->widget; if (widget == NULL) /* State is defunct */ return '\0'; label = get_label_from_button (widget, 0, FALSE); if (!GTK_IS_LABEL(label)) return '\0'; string = gtk_label_get_text (GTK_LABEL (label)); if (offset >= g_utf8_strlen (string, -1)) return '\0'; index = g_utf8_offset_to_pointer (string, offset); return g_utf8_get_char (index); } static void gail_button_finalize (GObject *object) { GailButton *button = GAIL_BUTTON (object); g_free (button->click_description); g_free (button->press_description); g_free (button->release_description); g_free (button->click_keybinding); if (button->action_idle_handler) { g_source_remove (button->action_idle_handler); button->action_idle_handler = 0; } if (button->action_queue) { g_queue_free (button->action_queue); } if (button->textutil) { g_object_unref (button->textutil); } G_OBJECT_CLASS (gail_button_parent_class)->finalize (object); } static GtkWidget* find_label_child (GtkContainer *container, gint *index, gboolean allow_many) { GList *children, *tmp_list; GtkWidget *child; children = gtk_container_get_children (container); child = NULL; for (tmp_list = children; tmp_list != NULL; tmp_list = tmp_list->next) { if (GTK_IS_LABEL (tmp_list->data)) { if (!allow_many) { if (child) { child = NULL; break; } child = GTK_WIDGET (tmp_list->data); } else { if (*index == 0) { child = GTK_WIDGET (tmp_list->data); break; } (*index)--; } } /* * Label for button which are GtkTreeView column headers are in a * GtkHBox in a GtkAlignment. */ else if (GTK_IS_ALIGNMENT (tmp_list->data)) { GtkWidget *widget; widget = gtk_bin_get_child (GTK_BIN (tmp_list->data)); if (GTK_IS_LABEL (widget)) { if (!allow_many) { if (child) { child = NULL; break; } child = widget; } else { if (*index == 0) { child = widget; break; } (*index)--; } } } else if (GTK_IS_CONTAINER (tmp_list->data)) { child = find_label_child (GTK_CONTAINER (tmp_list->data), index, allow_many); if (child) break; } } g_list_free (children); return child; } static GtkWidget* get_label_from_button (GtkWidget *button, gint index, gboolean allow_many) { GtkWidget *child; if (index > 0 && !allow_many) g_warning ("Inconsistent values passed to get_label_from_button"); child = gtk_bin_get_child (GTK_BIN (button)); if (GTK_IS_ALIGNMENT (child)) child = gtk_bin_get_child (GTK_BIN (child)); if (GTK_IS_CONTAINER (child)) child = find_label_child (GTK_CONTAINER (child), &index, allow_many); else if (!GTK_IS_LABEL (child)) child = NULL; return child; } static void count_labels (GtkContainer *container, gint *n_labels) { GList *children, *tmp_list; children = gtk_container_get_children (container); for (tmp_list = children; tmp_list != NULL; tmp_list = tmp_list->next) { if (GTK_IS_LABEL (tmp_list->data)) { (*n_labels)++; } /* * Label for button which are GtkTreeView column headers are in a * GtkHBox in a GtkAlignment. */ else if (GTK_IS_ALIGNMENT (tmp_list->data)) { GtkWidget *widget; widget = gtk_bin_get_child (GTK_BIN (tmp_list->data)); if (GTK_IS_LABEL (widget)) (*n_labels)++; } else if (GTK_IS_CONTAINER (tmp_list->data)) { count_labels (GTK_CONTAINER (tmp_list->data), n_labels); } } g_list_free (children); } static gint get_n_labels_from_button (GtkWidget *button) { GtkWidget *child; gint n_labels; n_labels = 0; child = gtk_bin_get_child (GTK_BIN (button)); if (GTK_IS_ALIGNMENT (child)) child = gtk_bin_get_child (GTK_BIN (child)); if (GTK_IS_CONTAINER (child)) count_labels (GTK_CONTAINER (child), &n_labels); return n_labels; } static void set_role_for_button (AtkObject *accessible, GtkWidget *button) { GtkWidget *parent; AtkRole role; parent = gtk_widget_get_parent (button); if (GTK_IS_TREE_VIEW (parent)) { role = ATK_ROLE_TABLE_COLUMN_HEADER; /* * Even though the accessible parent of the column header will * be reported as the table because the parent widget of the * GtkTreeViewColumn's button is the GtkTreeView we set * the accessible parent for column header to be the table * to ensure that atk_object_get_index_in_parent() returns * the correct value; see gail_widget_get_index_in_parent(). */ atk_object_set_parent (accessible, gtk_widget_get_accessible (parent)); } else role = ATK_ROLE_PUSH_BUTTON; accessible->role = role; } static gint get_n_attached_menus (GtkWidget *widget) { GList *list_menus; if (widget == NULL) return 0; list_menus = g_object_get_data (G_OBJECT (widget), GAIL_BUTTON_ATTACHED_MENUS); if (list_menus == NULL) return 0; return g_list_length (list_menus); } static GtkWidget* get_nth_attached_menu (GtkWidget *widget, gint index) { GtkWidget *attached_menu; GList *list_menus; if (widget == NULL) return NULL; list_menus = g_object_get_data (G_OBJECT (widget), GAIL_BUTTON_ATTACHED_MENUS); if (list_menus == NULL || index >= g_list_length (list_menus)) return NULL; attached_menu = (GtkWidget *) g_list_nth_data (list_menus, index); return attached_menu; }