From e38b3acf50a127bbe50e8a53e405f0f13740e230 Mon Sep 17 00:00:00 2001 From: raveit65 Date: Sun, 5 Mar 2017 19:29:14 +0100 Subject: libview: Implement AtkHypertext interface https://bugzilla.gnome.org/show_bug.cgi?id=639403 taken from: https://git.gnome.org/browse/evince/commit/?h=gnome-3-8&id=6c1d1a2 --- libview/ev-view-accessible.c | 139 ++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 131 insertions(+), 8 deletions(-) (limited to 'libview/ev-view-accessible.c') diff --git a/libview/ev-view-accessible.c b/libview/ev-view-accessible.c index 5a165bd2..e7feda22 100644 --- a/libview/ev-view-accessible.c +++ b/libview/ev-view-accessible.c @@ -27,10 +27,12 @@ #include "ev-selection.h" #include "ev-page-cache.h" #include "ev-view-accessible.h" +#include "ev-link-accessible.h" #include "ev-view-private.h" -static void ev_view_accessible_text_iface_init (AtkTextIface *iface); -static void ev_view_accessible_action_iface_init (AtkActionIface *iface); +static void ev_view_accessible_text_iface_init (AtkTextIface *iface); +static void ev_view_accessible_action_iface_init (AtkActionIface *iface); +static void ev_view_accessible_hypertext_iface_init (AtkHypertextIface *iface); enum { ACTION_SCROLL_UP, @@ -53,17 +55,24 @@ static const gchar *const ev_view_accessible_action_descriptions[] = }; struct _EvViewAccessiblePrivate { - /* Action */ - gchar *action_descriptions[LAST_ACTION]; - guint action_idle_handler; + guint current_page; + + /* AtkAction */ + gchar *action_descriptions[LAST_ACTION]; + guint action_idle_handler; GtkScrollType idle_scroll; + + /* AtkText */ GtkTextBuffer *buffer; - guint current_page; + + /* AtkHypertext */ + GHashTable *links; }; G_DEFINE_TYPE_WITH_CODE (EvViewAccessible, ev_view_accessible, GTK_TYPE_CONTAINER_ACCESSIBLE, - G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, ev_view_accessible_text_iface_init); - G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, ev_view_accessible_action_iface_init); + G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, ev_view_accessible_text_iface_init) + G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, ev_view_accessible_action_iface_init) + G_IMPLEMENT_INTERFACE (ATK_TYPE_HYPERTEXT, ev_view_accessible_hypertext_iface_init) ) static void @@ -78,7 +87,10 @@ ev_view_accessible_finalize (GObject *object) g_free (priv->action_descriptions [i]); if (priv->buffer) g_object_unref (priv->buffer); + if (priv->links) + g_hash_table_destroy (priv->links); + G_OBJECT_CLASS (ev_view_accessible_parent_class)->finalize (object); } static void @@ -810,6 +822,117 @@ static void ev_view_accessible_action_iface_init (AtkActionIface * iface) iface->set_description = ev_view_accessible_action_set_description; } +static GHashTable * +ev_view_accessible_get_links (EvViewAccessible *accessible, + EvView *view) +{ + EvViewAccessiblePrivate* priv = accessible->priv; + + if (view->current_page == priv->current_page && priv->links) + return priv->links; + + priv->current_page = view->current_page; + + if (priv->links) + g_hash_table_destroy (priv->links); + priv->links = g_hash_table_new_full (g_direct_hash, + g_direct_equal, + NULL, + (GDestroyNotify)g_object_unref); + return priv->links; +} + +static AtkHyperlink * +ev_view_accessible_get_link (AtkHypertext *hypertext, + gint link_index) +{ + GtkWidget *widget; + EvView *view; + GHashTable *links; + EvMappingList *link_mapping; + gint n_links; + EvMapping *mapping; + EvLinkAccessible *atk_link; + + widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (hypertext)); + if (widget == NULL) + /* State is defunct */ + return NULL; + + view = EV_VIEW (widget); + if (!EV_IS_DOCUMENT_LINKS (view->document)) + return NULL; + + links = ev_view_accessible_get_links (EV_VIEW_ACCESSIBLE (hypertext), view); + + atk_link = g_hash_table_lookup (links, GINT_TO_POINTER (link_index)); + if (atk_link) + return atk_hyperlink_impl_get_hyperlink (ATK_HYPERLINK_IMPL (atk_link)); + + link_mapping = ev_page_cache_get_link_mapping (view->page_cache, view->current_page); + if (!link_mapping) + return NULL; + + n_links = ev_mapping_list_length (link_mapping); + mapping = ev_mapping_list_nth (link_mapping, n_links - link_index - 1); + atk_link = ev_link_accessible_new (EV_VIEW_ACCESSIBLE (hypertext), + EV_LINK (mapping->data), + &mapping->area); + g_hash_table_insert (links, GINT_TO_POINTER (link_index), atk_link); + + return atk_hyperlink_impl_get_hyperlink (ATK_HYPERLINK_IMPL (atk_link)); +} + +static gint +ev_view_accessible_get_n_links (AtkHypertext *hypertext) +{ + GtkWidget *widget; + EvView *view; + EvMappingList *link_mapping; + + widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (hypertext)); + if (widget == NULL) + /* State is defunct */ + return 0; + + view = EV_VIEW (widget); + if (!EV_IS_DOCUMENT_LINKS (view->document)) + return 0; + + link_mapping = ev_page_cache_get_link_mapping (view->page_cache, view->current_page); + + return link_mapping ? ev_mapping_list_length (link_mapping) : 0; +} + +static gint +ev_view_accessible_get_link_index (AtkHypertext *hypertext, + gint offset) +{ + guint i; + + for (i = 0; i < ev_view_accessible_get_n_links (hypertext); i++) { + AtkHyperlink *hyperlink; + gint start_index, end_index; + + hyperlink = ev_view_accessible_get_link (hypertext, i); + start_index = atk_hyperlink_get_start_index (hyperlink); + end_index = atk_hyperlink_get_end_index (hyperlink); + + if (start_index <= offset && end_index >= offset) + return i; + } + + return -1; +} + +static void +ev_view_accessible_hypertext_iface_init (AtkHypertextIface *iface) +{ + iface->get_link = ev_view_accessible_get_link; + iface->get_n_links = ev_view_accessible_get_n_links; + iface->get_link_index = ev_view_accessible_get_link_index; +} + AtkObject * ev_view_accessible_new (GtkWidget *widget) { -- cgit v1.2.1