diff options
Diffstat (limited to 'shell/ev-view-accessible.c')
| -rw-r--r-- | shell/ev-view-accessible.c | 589 |
1 files changed, 589 insertions, 0 deletions
diff --git a/shell/ev-view-accessible.c b/shell/ev-view-accessible.c new file mode 100644 index 0000000..e53ba35 --- /dev/null +++ b/shell/ev-view-accessible.c @@ -0,0 +1,589 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */ +/* this file is part of evince, a gnome document viewer + * + * Copyright (C) 2004 Red Hat, Inc + * + * Evince is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Evince 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 + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <glib/gi18n.h> + +#include "ev-view-accessible.h" +#include "ev-view-private.h" + +#define EV_TYPE_VIEW_ACCESSIBLE (ev_view_accessible_get_type ()) +#define EV_VIEW_ACCESSIBLE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), EV_TYPE_VIEW_ACCESSIBLE, EvViewAccessible)) +#define EV_IS_VIEW_ACCESSIBLE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), EV_TYPE_VIEW_ACCESSIBLE)) + +static gulong accessible_private_data_quark; + +static GType ev_view_accessible_get_type (void); + +enum { + ACTION_SCROLL_UP, + ACTION_SCROLL_DOWN, + LAST_ACTION +}; + +static const gchar *const ev_view_accessible_action_names[] = +{ + N_("Scroll Up"), + N_("Scroll Down"), + NULL +}; + +static const gchar *const ev_view_accessible_action_descriptions[] = +{ + N_("Scroll View Up"), + N_("Scroll View Down"), + NULL +}; + +typedef struct { + /* Action */ + gchar *action_descriptions[LAST_ACTION]; + guint action_idle_handler; + EvScrollType idle_scroll; +} EvViewAccessiblePriv; + +static EvViewAccessiblePriv * +ev_view_accessible_get_priv (AtkObject *accessible) +{ + return g_object_get_qdata (G_OBJECT (accessible), + accessible_private_data_quark); +} + +static void +ev_view_accessible_free_priv (EvViewAccessiblePriv *priv) +{ + int i; + + if (priv->action_idle_handler) + g_source_remove (priv->action_idle_handler); + for (i = 0; i < LAST_ACTION; i++) + if (priv->action_descriptions [i] != NULL) + g_free (priv->action_descriptions [i]); +} + +static void ev_view_accessible_class_init (GtkAccessibleClass * klass) +{ + accessible_private_data_quark = g_quark_from_static_string ("ev-view-accessible-private-data"); + return; +} + +static gchar* +ev_view_accessible_get_text (AtkText *text, + gint start_pos, + gint end_pos) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return NULL; + + return NULL; +} + +static gunichar +ev_view_accessible_get_character_at_offset (AtkText *text, + gint offset) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return '\0'; + + return '\0'; +} + +static gchar* +ev_view_accessible_get_text_before_offset (AtkText *text, + gint offset, + AtkTextBoundary boundary_type, + gint *start_offset, + gint *end_offset) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return NULL; + + return NULL; +} + +static gchar* +ev_view_accessible_get_text_at_offset (AtkText *text, + gint offset, + AtkTextBoundary boundary_type, + gint *start_offset, + gint *end_offset) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return NULL; + + return NULL; +} + +static gchar* +ev_view_accessible_get_text_after_offset (AtkText *text, + gint offset, + AtkTextBoundary boundary_type, + gint *start_offset, + gint *end_offset) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return NULL; + + return NULL; +} + +static gint +ev_view_accessible_get_character_count (AtkText *text) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return 0; + + return 0; +} + +static gint +ev_view_accessible_get_caret_offset (AtkText *text) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return 0; + + return 0; +} + +static gboolean +ev_view_accessible_set_caret_offset (AtkText *text, gint offset) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return FALSE; + + return FALSE; +} + +static AtkAttributeSet* +ev_view_accessible_get_run_attributes (AtkText *text, + gint offset, + gint *start_offset, + gint *end_offset) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return NULL; + + return NULL; +} + +static AtkAttributeSet* +ev_view_accessible_get_default_attributes (AtkText *text) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return NULL; + + return NULL; +} + +static void +ev_view_accessible_get_character_extents (AtkText *text, + gint offset, + gint *x, + gint *y, + gint *width, + gint *height, + AtkCoordType coords) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return; + + return; +} + +static gint +ev_view_accessible_get_offset_at_point (AtkText *text, + gint x, + gint y, + AtkCoordType coords) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return -1; + + return -1; +} + +static gint +ev_view_accessible_get_n_selections (AtkText *text) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return -1; + + return -1; +} + +static gchar* +ev_view_accessible_get_selection (AtkText *text, + gint selection_num, + gint *start_pos, + gint *end_pos) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return NULL; + + return NULL; +} + +static gboolean +ev_view_accessible_add_selection (AtkText *text, + gint start_pos, + gint end_pos) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return FALSE; + + return FALSE; +} + +static gboolean +ev_view_accessible_remove_selection (AtkText *text, + gint selection_num) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return FALSE; + + return FALSE; +} + +static gboolean +ev_view_accessible_set_selection (AtkText *text, + gint selection_num, + gint start_pos, + gint end_pos) +{ + GtkWidget *widget; + + widget = GTK_ACCESSIBLE (text)->widget; + if (widget == NULL) + /* State is defunct */ + return FALSE; + + return FALSE; +} + + +static void ev_view_accessible_text_iface_init (AtkTextIface * iface) +{ + g_return_if_fail (iface != NULL); + + iface->get_text = ev_view_accessible_get_text; + iface->get_character_at_offset = ev_view_accessible_get_character_at_offset; + iface->get_text_before_offset = ev_view_accessible_get_text_before_offset; + iface->get_text_at_offset = ev_view_accessible_get_text_at_offset; + iface->get_text_after_offset = ev_view_accessible_get_text_after_offset; + iface->get_caret_offset = ev_view_accessible_get_caret_offset; + iface->set_caret_offset = ev_view_accessible_set_caret_offset; + iface->get_character_count = ev_view_accessible_get_character_count; + iface->get_n_selections = ev_view_accessible_get_n_selections; + iface->get_selection = ev_view_accessible_get_selection; + iface->add_selection = ev_view_accessible_add_selection; + iface->remove_selection = ev_view_accessible_remove_selection; + iface->set_selection = ev_view_accessible_set_selection; + iface->get_run_attributes = ev_view_accessible_get_run_attributes; + iface->get_default_attributes = ev_view_accessible_get_default_attributes; + iface->get_character_extents = ev_view_accessible_get_character_extents; + iface->get_offset_at_point = ev_view_accessible_get_offset_at_point; + return; +} + +static gboolean +ev_view_accessible_idle_do_action (gpointer data) +{ + EvViewAccessiblePriv* priv = ev_view_accessible_get_priv (ATK_OBJECT (data)); + + ev_view_scroll (EV_VIEW (GTK_ACCESSIBLE (data)->widget), + priv->idle_scroll); + priv->action_idle_handler = 0; + return FALSE; +} + +static gboolean +ev_view_accessible_action_do_action (AtkAction *action, + gint i) +{ + EvViewAccessiblePriv* priv = ev_view_accessible_get_priv (ATK_OBJECT (action)); + + if (GTK_ACCESSIBLE (action)->widget == NULL) + return FALSE; + + if (priv->action_idle_handler) + return FALSE; + + switch (i) { + case ACTION_SCROLL_UP: + priv->idle_scroll = EV_SCROLL_PAGE_BACKWARD; + break; + case ACTION_SCROLL_DOWN: + priv->idle_scroll = EV_SCROLL_PAGE_FORWARD; + break; + default: + return FALSE; + } + priv->action_idle_handler = g_idle_add (ev_view_accessible_idle_do_action, + action); + return TRUE; +} + +static gint +ev_view_accessible_action_get_n_actions (AtkAction *action) +{ + return LAST_ACTION; +} + +static const gchar * +ev_view_accessible_action_get_description (AtkAction *action, + gint i) +{ + EvViewAccessiblePriv* priv = ev_view_accessible_get_priv (ATK_OBJECT (action)); + + if (i < 0 || i >= LAST_ACTION) + return NULL; + + if (priv->action_descriptions[i]) + return priv->action_descriptions[i]; + else + return ev_view_accessible_action_descriptions[i]; +} + +static const gchar * +ev_view_accessible_action_get_name (AtkAction *action, + gint i) +{ + if (i < 0 || i >= LAST_ACTION) + return NULL; + + return ev_view_accessible_action_names[i]; +} + +static gboolean +ev_view_accessible_action_set_description (AtkAction *action, + gint i, + const gchar *description) +{ + EvViewAccessiblePriv* priv = ev_view_accessible_get_priv (ATK_OBJECT (action)); + + if (i < 0 || i >= LAST_ACTION) + return FALSE; + + if (priv->action_descriptions[i]) + g_free (priv->action_descriptions[i]); + + priv->action_descriptions[i] = g_strdup (description); + + return TRUE; +} + +static void ev_view_accessible_action_iface_init (AtkActionIface * iface) +{ + iface->do_action = ev_view_accessible_action_do_action; + iface->get_n_actions = ev_view_accessible_action_get_n_actions; + iface->get_description = ev_view_accessible_action_get_description; + iface->get_name = ev_view_accessible_action_get_name; + iface->set_description = ev_view_accessible_action_set_description; + return; +} + +GType ev_view_accessible_get_type (void) +{ + static GType type = 0; + + if (!type) { + static GTypeInfo tinfo = { + 0, /* class size */ + (GBaseInitFunc) NULL, /* base init */ + (GBaseFinalizeFunc) NULL, /* base finalize */ + (GClassInitFunc) ev_view_accessible_class_init, /* class init */ + (GClassFinalizeFunc) NULL, /* class finalize */ + NULL, /* class data */ + 0, /* instance size */ + 0, /* nb preallocs */ + (GInstanceInitFunc) NULL, /* instance init */ + NULL /* value table */ + }; + + static const GInterfaceInfo atk_text_info = { + (GInterfaceInitFunc) + ev_view_accessible_text_iface_init, + (GInterfaceFinalizeFunc) NULL, + NULL + }; + + static const GInterfaceInfo atk_action_info = { + (GInterfaceInitFunc) + ev_view_accessible_action_iface_init, + (GInterfaceFinalizeFunc) NULL, + NULL + }; + /* + * Figure out the size of the class and instance + * we are deriving from + */ + AtkObjectFactory *factory; + GType derived_type; + GTypeQuery query; + GType derived_atk_type; + + derived_type = g_type_parent (EV_TYPE_VIEW); + factory = atk_registry_get_factory (atk_get_default_registry (), + derived_type); + derived_atk_type = atk_object_factory_get_accessible_type (factory); + + g_type_query (derived_atk_type, &query); + tinfo.class_size = query.class_size; + tinfo.instance_size = query.instance_size; + + type = g_type_register_static (derived_atk_type, "EvViewAccessible", + &tinfo, 0); + g_type_add_interface_static (type, ATK_TYPE_TEXT, + &atk_text_info); + g_type_add_interface_static (type, ATK_TYPE_ACTION, + &atk_action_info); + } + + return type; +} + +static AtkObject *ev_view_accessible_new(GObject * obj) +{ + AtkObject *accessible; + EvViewAccessiblePriv *priv; + + g_return_val_if_fail(EV_IS_VIEW (obj), NULL); + + accessible = g_object_new (ev_view_accessible_get_type (), NULL); + atk_object_initialize (accessible, obj); + + atk_object_set_name (ATK_OBJECT (accessible), _("Document View")); + atk_object_set_role (ATK_OBJECT (accessible), ATK_ROLE_UNKNOWN); + + priv = g_new0 (EvViewAccessiblePriv, 1); + g_object_set_qdata_full (G_OBJECT (accessible), + accessible_private_data_quark, + priv, + (GDestroyNotify) ev_view_accessible_free_priv); + + return accessible; +} + +GType ev_view_accessible_factory_get_accessible_type(void) +{ + return ev_view_accessible_get_type(); +} + +static AtkObject *ev_view_accessible_factory_create_accessible (GObject * obj) +{ + return ev_view_accessible_new(obj); +} + +static void ev_view_accessible_factory_class_init (AtkObjectFactoryClass * klass) +{ + klass->create_accessible = ev_view_accessible_factory_create_accessible; + klass->get_accessible_type = + ev_view_accessible_factory_get_accessible_type; +} + +GType ev_view_accessible_factory_get_type (void) +{ + static GType type = 0; + + if (!type) { + static const GTypeInfo tinfo = { + sizeof(AtkObjectFactoryClass), + NULL, /* base_init */ + NULL, /* base_finalize */ + (GClassInitFunc) ev_view_accessible_factory_class_init, + NULL, /* class_finalize */ + NULL, /* class_data */ + sizeof(AtkObjectFactory), + 0, /* n_preallocs */ + NULL, NULL + }; + + type = g_type_register_static (ATK_TYPE_OBJECT_FACTORY, + "EvViewAccessibleFactory", &tinfo, + 0); + } + return type; +} + + + |