ev-page-accessible.c File Reference

#include <config.h>
#include <glib/gi18n-lib.h>
#include "ev-page-accessible.h"
#include "ev-form-field-accessible.h"
#include "ev-image-accessible.h"
#include "ev-link-accessible.h"
#include "ev-view-private.h"

Include dependency graph for ev-page-accessible.c:

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Data Structures
struct	_EvPageAccessiblePrivate

Enumerations
enum	{ PROP_0, PROP_VIEW_ACCESSIBLE, PROP_PAGE }

Functions
static void	ev_page_accessible_component_iface_init (AtkComponentIface *iface)
static void	ev_page_accessible_hypertext_iface_init (AtkHypertextIface *iface)
static void	ev_page_accessible_text_iface_init (AtkTextIface *iface)
	G_DEFINE_TYPE_WITH_CODE (EvPageAccessible, ev_page_accessible, ATK_TYPE_OBJECT, G_IMPLEMENT_INTERFACE(ATK_TYPE_TEXT, ev_page_accessible_text_iface_init))
EvViewAccessible *	ev_page_accessible_get_view_accessible (EvPageAccessible *page_accessible)
static AtkObject *	ev_page_accessible_get_parent (AtkObject *obj)
static gint	compare_mappings (EvMapping *a, EvMapping *b)
static void	ev_page_accessible_initialize_children (EvPageAccessible *self)
static void	clear_children (EvPageAccessible *self)
static void	ev_page_accessible_finalize (GObject *object)
static void	ev_page_accessible_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
static void	ev_page_accessible_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
static AtkRelationSet *	ev_page_accessible_ref_relation_set (AtkObject *accessible)
static AtkStateSet *	ev_page_accessible_ref_state_set (AtkObject *accessible)
static gint	ev_page_accessible_get_n_children (AtkObject *accessible)
static AtkObject *	ev_page_accessible_ref_child (AtkObject *accessible, gint i)
static void	ev_page_accessible_class_init (EvPageAccessibleClass *klass)
EvView *	ev_page_accessible_get_view (EvPageAccessible *page_accessible)
static gboolean	treat_as_soft_return (EvView *view, gint page, PangoLogAttr *log_attrs, gint offset)
static gchar *	ev_page_accessible_get_substring (AtkText *text, gint start_offset, gint end_offset)
static gchar *	ev_page_accessible_get_text (AtkText *text, gint start_pos, gint end_pos)
static gunichar	ev_page_accessible_get_character_at_offset (AtkText *text, gint offset)
static void	ev_page_accessible_get_range_for_boundary (AtkText *text, AtkTextBoundary boundary_type, gint offset, gint *start_offset, gint *end_offset)
static gchar *	ev_page_accessible_get_text_at_offset (AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset)
static gint	ev_page_accessible_get_caret_offset (AtkText *text)
static gboolean	ev_page_accessible_set_caret_offset (AtkText *text, gint offset)
static gint	ev_page_accessible_get_character_count (AtkText *text)
static gboolean	get_selection_bounds (EvView *view, EvViewSelection *selection, gint *start_offset, gint *end_offset)
static gint	ev_page_accessible_get_n_selections (AtkText *text)
static gchar *	ev_page_accessible_get_selection (AtkText *text, gint selection_num, gint *start_pos, gint *end_pos)
static AtkAttributeSet *	add_attribute (AtkAttributeSet *attr_set, AtkTextAttribute attr_type, gchar *attr_value)
static AtkAttributeSet *	get_run_attributes (PangoAttrList *attrs, const gchar *text, gint offset, gint *start_offset, gint *end_offset)
static AtkAttributeSet *	ev_page_accessible_get_run_attributes (AtkText *text, gint offset, gint *start_offset, gint *end_offset)
static AtkAttributeSet *	ev_page_accessible_get_default_attributes (AtkText *text)
static void	ev_page_accessible_get_character_extents (AtkText *text, gint offset, gint *x, gint *y, gint *width, gint *height, AtkCoordType coords)
static gint	ev_page_accessible_get_offset_at_point (AtkText *text, gint x, gint y, AtkCoordType coords)
static gboolean	ev_page_accessible_remove_selection (AtkText *text, gint selection_num)
static gboolean	ev_page_accessible_set_selection (AtkText *text, gint selection_num, gint start_pos, gint end_pos)
static gboolean	ev_page_accessible_add_selection (AtkText *text, gint start_pos, gint end_pos)
static void	ev_page_accessible_init (EvPageAccessible *page)
static GHashTable *	ev_page_accessible_get_links (EvPageAccessible *accessible)
static AtkHyperlink *	ev_page_accessible_get_link (AtkHypertext *hypertext, gint link_index)
static gint	ev_page_accessible_get_n_links (AtkHypertext *hypertext)
static gint	ev_page_accessible_get_link_index (AtkHypertext *hypertext, gint offset)
static void	ev_page_accessible_get_extents (AtkComponent *atk_component, gint *x, gint *y, gint *width, gint *height, AtkCoordType coord_type)
static void	page_cached_cb (EvPageCache *cache, gint page, EvPageAccessible *self)
EvPageAccessible *	ev_page_accessible_new (EvViewAccessible *view_accessible, gint page)
AtkObject *	ev_page_accessible_get_accessible_for_mapping (EvPageAccessible *page_accessible, EvMapping *mapping)
void	ev_page_accessible_update_element_state (EvPageAccessible *page_accessible, EvMapping *mapping)

Enumeration Type Documentation

anonymous enum

Enumerator
PROP_0
PROP_VIEW_ACCESSIBLE
PROP_PAGE

Definition at line 41 of file ev-page-accessible.c.

     {
    PROP_0,
    PROP_VIEW_ACCESSIBLE,
    PROP_PAGE,
};

Function Documentation

static AtkAttributeSet* add_attribute ( AtkAttributeSet *  attr_set, AtkTextAttribute  attr_type, gchar *  attr_value  )

static

Definition at line 763 of file ev-page-accessible.c.

{
  AtkAttribute *attr = g_new (AtkAttribute, 1);

  attr->name = g_strdup (atk_text_attribute_get_name (attr_type));
  attr->value = attr_value;

  return g_slist_prepend (attr_set, attr);
}

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static void clear_children ( EvPageAccessible *  self)

static

Definition at line 151 of file ev-page-accessible.c.

{
    gint i;
    AtkObject *child;

    if (!self->priv->children)
        return;

    for (i = 0; i < self->priv->children->len; i++) {
        child = g_ptr_array_index (self->priv->children, i);
        atk_object_notify_state_change (child, ATK_STATE_DEFUNCT, TRUE);
    }

    g_clear_pointer (&self->priv->children, g_ptr_array_unref);
}

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static gint compare_mappings ( EvMapping *  a, EvMapping *  b  )

static

Definition at line 85 of file ev-page-accessible.c.

{
    gdouble dx, dy;

    /* Very rough heuristic for simple, non-tagged PDFs. */

    dy = a->area.y1 - b->area.y1;
    dx = a->area.x1 - b->area.x1;

    return ABS (dy) > 10 ? dy : dx;
}

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static gboolean ev_page_accessible_add_selection ( AtkText *  text, gint  start_pos, gint  end_pos  )

static

Definition at line 1038 of file ev-page-accessible.c.

{
    return ev_page_accessible_set_selection (text, 0, start_pos, end_pos);

}

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static void ev_page_accessible_class_init ( EvPageAccessibleClass *  klass)

static

Definition at line 345 of file ev-page-accessible.c.

{
    GObjectClass   *g_object_class = G_OBJECT_CLASS (klass);
    AtkObjectClass *atk_class = ATK_OBJECT_CLASS (klass);

        g_type_class_add_private (klass, sizeof (EvPageAccessiblePrivate));

    atk_class->get_parent  = ev_page_accessible_get_parent;
    atk_class->ref_relation_set = ev_page_accessible_ref_relation_set;
    atk_class->ref_state_set = ev_page_accessible_ref_state_set;
    atk_class->get_n_children = ev_page_accessible_get_n_children;
    atk_class->ref_child = ev_page_accessible_ref_child;

    g_object_class->get_property = ev_page_accessible_get_property;
    g_object_class->set_property = ev_page_accessible_set_property;
        g_object_class->finalize = ev_page_accessible_finalize;

    g_object_class_install_property (g_object_class,
                     PROP_VIEW_ACCESSIBLE,
                     g_param_spec_object ("view-accessible",
                                  "View Accessible",
                                  "The view accessible associated to this page",
                                  EV_TYPE_VIEW_ACCESSIBLE,
                                  G_PARAM_READWRITE |
                                  G_PARAM_CONSTRUCT_ONLY |
                                                              G_PARAM_STATIC_STRINGS));
    g_object_class_install_property (g_object_class,
                     PROP_PAGE,
                     g_param_spec_int ("page",
                               "Page",
                               "Page index this page represents",
                               -1, G_MAXINT, -1,
                               G_PARAM_READWRITE |
                               G_PARAM_CONSTRUCT_ONLY |
                                                           G_PARAM_STATIC_STRINGS));

}

static void ev_page_accessible_component_iface_init ( AtkComponentIface *  iface)

static

Definition at line 1206 of file ev-page-accessible.c.

{
        iface->get_extents = ev_page_accessible_get_extents;
}

static void ev_page_accessible_finalize ( GObject *  object)

static

Definition at line 168 of file ev-page-accessible.c.

{
    EvPageAccessiblePrivate *priv = EV_PAGE_ACCESSIBLE (object)->priv;

    g_clear_pointer (&priv->links, (GDestroyNotify)g_hash_table_destroy);
    clear_children (EV_PAGE_ACCESSIBLE (object));

    G_OBJECT_CLASS (ev_page_accessible_parent_class)->finalize (object);
}

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AtkObject* ev_page_accessible_get_accessible_for_mapping	(	EvPageAccessible *	page_accessible,
		EvMapping *	mapping
	)

Definition at line 1247 of file ev-page-accessible.c.

{
    gint i;

    ev_page_accessible_initialize_children (page_accessible);
    if (!mapping || !page_accessible->priv->children)
        return NULL;

    for (i = 0; i < page_accessible->priv->children->len; i++) {
        AtkObject *child;

        child = g_ptr_array_index (page_accessible->priv->children, i);
        if (EV_IS_FORM_FIELD_ACCESSIBLE (child) &&
            ev_form_field_accessible_get_field (EV_FORM_FIELD_ACCESSIBLE (child)) == mapping->data)
            return child;
    }

    return NULL;
}

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static gint ev_page_accessible_get_caret_offset ( AtkText *  text)

static

Definition at line 608 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);

    if (self->priv->page == view->cursor_page && view->caret_enabled)
        return view->cursor_offset;

    return -1;
}

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static gunichar ev_page_accessible_get_character_at_offset ( AtkText *  text, gint  offset  )

static

Definition at line 510 of file ev-page-accessible.c.

{
    gchar *string;
    gunichar unichar;

    string = ev_page_accessible_get_substring (text, offset, offset + 1);
    unichar = g_utf8_get_char (string);
    g_free(string);

    return unichar;
}

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static gint ev_page_accessible_get_character_count ( AtkText *  text)

static

Definition at line 633 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);
    gint retval;

    retval = g_utf8_strlen (ev_page_cache_get_text (view->page_cache, self->priv->page), -1);

    return retval;
}

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static void ev_page_accessible_get_character_extents ( AtkText *  text, gint  offset, gint *  x, gint *  y, gint *  width, gint *  height, AtkCoordType  coords  )

static

Definition at line 888 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);
    GtkWidget *toplevel;
    EvRectangle *areas = NULL;
    EvRectangle *doc_rect;
    guint n_areas = 0;
    gint x_widget, y_widget;
    GdkRectangle view_rect;

    if (!view->page_cache)
        return;

    ev_page_cache_get_text_layout (view->page_cache, self->priv->page, &areas, &n_areas);
    if (!areas || offset >= n_areas)
        return;

    doc_rect = areas + offset;
    _ev_view_transform_doc_rect_to_view_rect (view, self->priv->page, doc_rect, &view_rect);
    view_rect.x -= view->scroll_x;
    view_rect.y -= view->scroll_y;

    toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
    gtk_widget_translate_coordinates (GTK_WIDGET (view), toplevel, 0, 0, &x_widget, &y_widget);
    view_rect.x += x_widget;
    view_rect.y += y_widget;

    if (coords == ATK_XY_SCREEN) {
        gint x_window, y_window;

        gdk_window_get_origin (gtk_widget_get_window (toplevel), &x_window, &y_window);
        view_rect.x += x_window;
        view_rect.y += y_window;
    }

    *x = view_rect.x;
    *y = view_rect.y;
    *width = view_rect.width;
    *height = view_rect.height;
}

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static AtkAttributeSet* ev_page_accessible_get_default_attributes ( AtkText *  text)

static

Definition at line 881 of file ev-page-accessible.c.

{
    /* No default attributes */
    return NULL;
}

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static void ev_page_accessible_get_extents ( AtkComponent *  atk_component, gint *  x, gint *  y, gint *  width, gint *  height, AtkCoordType  coord_type  )

static

Definition at line 1176 of file ev-page-accessible.c.

{
    EvPageAccessible *self;
    EvView *view;
    GdkRectangle page_area;
    GtkBorder border;
    EvRectangle doc_rect, atk_rect;

    self = EV_PAGE_ACCESSIBLE (atk_component);
    view = ev_page_accessible_get_view (self);
    ev_view_get_page_extents (view, self->priv->page, &page_area, &border);

    doc_rect.x1 = page_area.x;
    doc_rect.y1 = page_area.y;
    doc_rect.x2 = page_area.x + page_area.width;
    doc_rect.y2 = page_area.y + page_area.height;
    _transform_doc_rect_to_atk_rect (self->priv->view_accessible, self->priv->page, &doc_rect, &atk_rect, coord_type);

    *x = atk_rect.x1;
    *y = atk_rect.y1;
    *width = atk_rect.x2 - atk_rect.x1;
    *height = atk_rect.y2 - atk_rect.y1;
}

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static AtkHyperlink* ev_page_accessible_get_link ( AtkHypertext *  hypertext, gint  link_index  )

static

Definition at line 1089 of file ev-page-accessible.c.

{
    GHashTable       *links;
    EvMappingList    *link_mapping;
    gint              n_links;
    EvMapping        *mapping;
    EvLinkAccessible *atk_link;
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (hypertext);
    EvView *view = ev_page_accessible_get_view (self);

    if (link_index < 0)
        return NULL;

    if (!EV_IS_DOCUMENT_LINKS (view->document))
        return NULL;

    links = ev_page_accessible_get_links (EV_PAGE_ACCESSIBLE (hypertext));

    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, self->priv->page);
    if (!link_mapping)
        return NULL;

    n_links = ev_mapping_list_length (link_mapping);
    if (link_index > n_links - 1)
        return NULL;

    mapping = ev_mapping_list_nth (link_mapping, n_links - link_index - 1);
    atk_link = ev_link_accessible_new (EV_PAGE_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));
}

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static gint ev_page_accessible_get_link_index ( AtkHypertext *  hypertext, gint  offset  )

static

Definition at line 1146 of file ev-page-accessible.c.

{
    guint i;
    gint n_links = ev_page_accessible_get_n_links (hypertext);

    for (i = 0; i < n_links; i++) {
        AtkHyperlink *hyperlink;
        gint          start_index, end_index;

        hyperlink = ev_page_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;
}

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static GHashTable* ev_page_accessible_get_links ( EvPageAccessible *  accessible)

static

Definition at line 1074 of file ev-page-accessible.c.

{
    EvPageAccessiblePrivate* priv = accessible->priv;

    if (priv->links)
        return priv->links;

    priv->links = g_hash_table_new_full (g_direct_hash,
                         g_direct_equal,
                         NULL,
                         (GDestroyNotify)g_object_unref);
    return priv->links;
}

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static gint ev_page_accessible_get_n_children ( AtkObject *  accessible)

static

Definition at line 322 of file ev-page-accessible.c.

{
       EvPageAccessible *self;

       self = EV_PAGE_ACCESSIBLE (accessible);

       return self->priv->children == NULL ? 0 : self->priv->children->len;
}

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static gint ev_page_accessible_get_n_links ( AtkHypertext *  hypertext)

static

Definition at line 1130 of file ev-page-accessible.c.

{
    EvMappingList *link_mapping;
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (hypertext);
    EvView *view = ev_page_accessible_get_view (self);

    if (!EV_IS_DOCUMENT_LINKS (view->document))
        return 0;

    link_mapping = ev_page_cache_get_link_mapping (view->page_cache,
                               self->priv->page);

    return link_mapping ? ev_mapping_list_length (link_mapping) : 0;
}

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static gint ev_page_accessible_get_n_selections ( AtkText *  text)

static

Definition at line 681 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);
    gint n_selections = 0;
    GList *l;

    if (!EV_IS_SELECTION (view->document) || !view->selection_info.selections)
        return 0;

    for (l = view->selection_info.selections; l != NULL; l = l->next) {
        EvViewSelection *selection = (EvViewSelection *)l->data;

        if (selection->page != self->priv->page)
            continue;

        n_selections = 1;
        break;
    }

    return n_selections;
}

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static gint ev_page_accessible_get_offset_at_point ( AtkText *  text, gint  x, gint  y, AtkCoordType  coords  )

static

Definition at line 937 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);
    GtkWidget *toplevel;
    EvRectangle *areas = NULL;
    EvRectangle *rect = NULL;
    guint n_areas = 0;
    guint i;
    gint x_widget, y_widget;
    gint offset=-1;
    GdkPoint view_point;
    gdouble doc_x, doc_y;
    GtkBorder border;
    GdkRectangle page_area;

    if (!view->page_cache)
        return -1;

    ev_page_cache_get_text_layout (view->page_cache, self->priv->page, &areas, &n_areas);
    if (!areas)
        return -1;

    view_point.x = x;
    view_point.y = y;
    toplevel = gtk_widget_get_toplevel (GTK_WIDGET (self));
    gtk_widget_translate_coordinates (GTK_WIDGET (self), toplevel, 0, 0, &x_widget, &y_widget);
    view_point.x -= x_widget;
    view_point.y -= y_widget;

    if (coords == ATK_XY_SCREEN) {
        gint x_window, y_window;

        gdk_window_get_origin (gtk_widget_get_window (toplevel), &x_window, &y_window);
        view_point.x -= x_window;
        view_point.y -= y_window;
    }

    ev_view_get_page_extents (view, self->priv->page, &page_area, &border);
    _ev_view_transform_view_point_to_doc_point (view, &view_point, &page_area, &border, &doc_x, &doc_y);

    for (i = 0; i < n_areas; i++) {
        rect = areas + i;
        if (doc_x >= rect->x1 && doc_x <= rect->x2 &&
            doc_y >= rect->y1 && doc_y <= rect->y2)
            offset = i;
    }

    return offset;
}

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static AtkObject* ev_page_accessible_get_parent ( AtkObject *  obj)

static

Definition at line 73 of file ev-page-accessible.c.

{
    EvPageAccessible *self;

    g_return_val_if_fail (EV_IS_PAGE_ACCESSIBLE (obj), NULL);

    self = EV_PAGE_ACCESSIBLE (obj);

    return ATK_OBJECT (self->priv->view_accessible);
}

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static void ev_page_accessible_get_property ( GObject *  object, guint  prop_id, GValue *  value, GParamSpec *  pspec  )

static

Definition at line 199 of file ev-page-accessible.c.

{
    EvPageAccessible *accessible = EV_PAGE_ACCESSIBLE (object);

    switch (prop_id) {
    case PROP_VIEW_ACCESSIBLE:
        g_value_set_object (value, ev_page_accessible_get_view_accessible (accessible));
        break;
    case PROP_PAGE:
        g_value_set_int (value, ev_page_accessible_get_page (accessible));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
    }
}

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static void ev_page_accessible_get_range_for_boundary ( AtkText *  text, AtkTextBoundary  boundary_type, gint  offset, gint *  start_offset, gint *  end_offset  )

static

Definition at line 524 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);
    gint start = 0;
    gint end = 0;
    PangoLogAttr *log_attrs = NULL;
    gulong n_attrs;

    if (!view->page_cache)
        return;

    ev_page_cache_get_text_log_attrs (view->page_cache, self->priv->page, &log_attrs, &n_attrs);
    if (!log_attrs)
        return;

    if (offset < 0 || offset >= n_attrs)
        return;

    switch (boundary_type) {
    case ATK_TEXT_BOUNDARY_CHAR:
        start = offset;
        end = offset + 1;
        break;
    case ATK_TEXT_BOUNDARY_WORD_START:
        for (start = offset; start > 0 && !log_attrs[start].is_word_start; start--);
        for (end = offset + 1; end < n_attrs && !log_attrs[end].is_word_start; end++);
        break;
    case ATK_TEXT_BOUNDARY_SENTENCE_START:
        for (start = offset; start > 0; start--) {
            if (log_attrs[start].is_mandatory_break && treat_as_soft_return (view, self->priv->page, log_attrs, start - 1))
                continue;
            if (log_attrs[start].is_sentence_start)
                break;
        }
        for (end = offset + 1; end < n_attrs; end++) {
            if (log_attrs[end].is_mandatory_break && treat_as_soft_return (view, self->priv->page, log_attrs, end - 1))
                continue;
            if (log_attrs[end].is_sentence_start)
                break;
        }
        break;
    case ATK_TEXT_BOUNDARY_LINE_START:
        for (start = offset; start > 0 && !log_attrs[start].is_mandatory_break; start--);
        for (end = offset + 1; end < n_attrs && !log_attrs[end].is_mandatory_break; end++);
        break;
    default:
        /* The "END" boundary types are deprecated */
        break;
    }

    *start_offset = start;
    *end_offset = end;
}

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static AtkAttributeSet* ev_page_accessible_get_run_attributes ( AtkText *  text, gint  offset, gint *  start_offset, gint *  end_offset  )

static

Definition at line 853 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);
    PangoAttrList *attrs;
    const gchar   *page_text;

    if (offset < 0)
        return NULL;

    if (!view->page_cache)
        return NULL;

    page_text = ev_page_cache_get_text (view->page_cache, self->priv->page);
    if (!page_text)
        return NULL;

    attrs = ev_page_cache_get_text_attrs (view->page_cache, self->priv->page);
    if (!attrs)
        return NULL;

    return get_run_attributes (attrs, page_text, offset, start_offset, end_offset);
}

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static gchar* ev_page_accessible_get_selection ( AtkText *  text, gint  selection_num, gint *  start_pos, gint *  end_pos  )

static

Definition at line 705 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);
    gchar *selected_text = NULL;
    gchar *normalized_text = NULL;
    GList *l;

    *start_pos = -1;
    *end_pos = -1;

    if (selection_num != 0)
        return NULL;

    if (!EV_IS_SELECTION (view->document) || !view->selection_info.selections)
        return NULL;

    for (l = view->selection_info.selections; l != NULL; l = l->next) {
        EvViewSelection *selection = (EvViewSelection *)l->data;
        gint start, end;

        if (selection->page != self->priv->page)
            continue;

        if (get_selection_bounds (view, selection, &start, &end) && start != end) {
            EvPage *page;

            page = ev_document_get_page (view->document, selection->page);

            ev_document_doc_mutex_lock ();
            selected_text = ev_selection_get_selected_text (EV_SELECTION (view->document),
                                    page,
                                    selection->style,
                                    &(selection->rect));

            ev_document_doc_mutex_unlock ();

            g_object_unref (page);

            *start_pos = start;
            *end_pos = end;
        }

        break;
    }

    if (selected_text) {
        normalized_text = g_utf8_normalize (selected_text, -1, G_NORMALIZE_NFKC);
        g_free (selected_text);
    }

    return normalized_text;
}

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static gchar* ev_page_accessible_get_substring ( AtkText *  text, gint  start_offset, gint  end_offset  )

static

Definition at line 477 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);
    gchar *substring, *normalized;
    const gchar* page_text;

    if (!view->page_cache)
        return NULL;

    page_text = ev_page_cache_get_text (view->page_cache, self->priv->page);
    if (end_offset < 0 || end_offset > g_utf8_strlen (page_text, -1))
        end_offset = strlen (page_text);
    start_offset = CLAMP (start_offset, 0, end_offset);

    substring = g_utf8_substring (page_text, start_offset, end_offset);
    normalized = g_utf8_normalize (substring, -1, G_NORMALIZE_NFKC);
    g_free (substring);

    return normalized;
}

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static gchar* ev_page_accessible_get_text ( AtkText *  text, gint  start_pos, gint  end_pos  )

static

Definition at line 502 of file ev-page-accessible.c.

{
    return ev_page_accessible_get_substring (text, start_pos, end_pos);
}

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static gchar* ev_page_accessible_get_text_at_offset ( AtkText *  text, gint  offset, AtkTextBoundary  boundary_type, gint *  start_offset, gint *  end_offset  )

static

Definition at line 584 of file ev-page-accessible.c.

{
    gchar *retval;

    ev_page_accessible_get_range_for_boundary (text, boundary_type, offset, start_offset, end_offset);
    retval = ev_page_accessible_get_substring (text, *start_offset, *end_offset);

    /* If newlines appear inside the text of a sentence (i.e. between the start and
     * end offsets returned by ev_page_accessible_get_substring), it interferes with
     * the prosody of text-to-speech based-solutions such as a screen reader because
     * speech synthesizers tend to pause after the newline char as if it were the end
     * of the sentence.
     */
        if (boundary_type == ATK_TEXT_BOUNDARY_SENTENCE_START)
        g_strdelimit (retval, "\n", ' ');

    return retval;
}

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EvView* ev_page_accessible_get_view

(

EvPageAccessible *

page_accessible)

Definition at line 384 of file ev-page-accessible.c.

{
    g_return_val_if_fail (EV_IS_PAGE_ACCESSIBLE (page_accessible), NULL);

    return EV_VIEW (gtk_accessible_get_widget (GTK_ACCESSIBLE (page_accessible->priv->view_accessible)));
}

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EvViewAccessible* ev_page_accessible_get_view_accessible

(

EvPageAccessible *

page_accessible)

Definition at line 65 of file ev-page-accessible.c.

{
    g_return_val_if_fail (EV_IS_PAGE_ACCESSIBLE (page_accessible), NULL);

    return page_accessible->priv->view_accessible;
}

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static void ev_page_accessible_hypertext_iface_init ( AtkHypertextIface *  iface)

static

Definition at line 1168 of file ev-page-accessible.c.

{
    iface->get_link = ev_page_accessible_get_link;
    iface->get_n_links = ev_page_accessible_get_n_links;
    iface->get_link_index = ev_page_accessible_get_link_index;
}

static void ev_page_accessible_init ( EvPageAccessible *  page)

static

Definition at line 1047 of file ev-page-accessible.c.

{
    atk_object_set_role (ATK_OBJECT (page), ATK_ROLE_PAGE);

        page->priv = G_TYPE_INSTANCE_GET_PRIVATE (page, EV_TYPE_PAGE_ACCESSIBLE, EvPageAccessiblePrivate);
}

static void ev_page_accessible_initialize_children ( EvPageAccessible *  self)

static

Definition at line 98 of file ev-page-accessible.c.

{
    EvView *view;
    EvMappingList *images;
    EvMappingList *links;
    EvMappingList *fields;
    GList *children = NULL;
    GList *list;

    if (self->priv->children_initialized)
        return;

    view = ev_page_accessible_get_view (self);
    if (!ev_page_cache_is_page_cached (view->page_cache, self->priv->page))
        return;

    self->priv->children_initialized = TRUE;

    links = ev_page_cache_get_link_mapping (view->page_cache, self->priv->page);
    images = ev_page_cache_get_image_mapping (view->page_cache, self->priv->page);
    fields = ev_page_cache_get_form_field_mapping (view->page_cache, self->priv->page);
    if (!links && !images && !fields)
        return;

    children = g_list_copy (ev_mapping_list_get_list (links));
    children = g_list_concat (children, g_list_copy (ev_mapping_list_get_list (images)));
    children = g_list_concat (children, g_list_copy (ev_mapping_list_get_list (fields)));

    children = g_list_sort (children, (GCompareFunc) compare_mappings);
    self->priv->children = g_ptr_array_new_full (g_list_length (children), (GDestroyNotify) g_object_unref);

    for (list = children; list && list->data; list = list->next) {
        EvMapping *mapping = list->data;
        AtkObject *child = NULL;

        if (links && ev_mapping_list_find (links, mapping->data)) {
            EvLinkAccessible *link = ev_link_accessible_new (self, EV_LINK (mapping->data), &mapping->area);
            AtkHyperlink *atk_link = atk_hyperlink_impl_get_hyperlink (ATK_HYPERLINK_IMPL (link));

            child = atk_hyperlink_get_object (atk_link, 0);
        } else if (images && ev_mapping_list_find (images, mapping->data))
            child = ATK_OBJECT (ev_image_accessible_new (self, EV_IMAGE (mapping->data), &mapping->area));
        else if (fields && ev_mapping_list_find (fields, mapping->data))
            child = ATK_OBJECT (ev_form_field_accessible_new (self, EV_FORM_FIELD (mapping->data), &mapping->area));

        if (child)
            g_ptr_array_add (self->priv->children, child);
    }

    g_list_free (children);
}

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EvPageAccessible* ev_page_accessible_new	(	EvViewAccessible *	view_accessible,
		gint	page
	)

Definition at line 1221 of file ev-page-accessible.c.

{
        EvPageAccessible *atk_page;
    EvView *view;

    g_return_val_if_fail (EV_IS_VIEW_ACCESSIBLE (view_accessible), NULL);
    g_return_val_if_fail (page >= 0, NULL);

        atk_page = g_object_new (EV_TYPE_PAGE_ACCESSIBLE,
                 "view-accessible", view_accessible,
                 "page", page,
                 NULL);

    view = ev_page_accessible_get_view (EV_PAGE_ACCESSIBLE (atk_page));
    if (ev_page_cache_is_page_cached (view->page_cache, page))
        ev_page_accessible_initialize_children (EV_PAGE_ACCESSIBLE (atk_page));
    else
        g_signal_connect (view->page_cache, "page-cached",
                  G_CALLBACK (page_cached_cb),
                  atk_page);

        return EV_PAGE_ACCESSIBLE (atk_page);
}

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static AtkObject* ev_page_accessible_ref_child ( AtkObject *  accessible, gint  i  )

static

Definition at line 332 of file ev-page-accessible.c.

{
       EvPageAccessible *self;

       self = EV_PAGE_ACCESSIBLE (accessible);

       g_return_val_if_fail (i >= 0 || i < self->priv->children->len, NULL);

       return g_object_ref (g_ptr_array_index (self->priv->children, i));
}

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static AtkRelationSet* ev_page_accessible_ref_relation_set ( AtkObject *  accessible)

static

Definition at line 225 of file ev-page-accessible.c.

{
    gint n_pages;
    EvPageAccessible *self;
    AtkRelationSet *relation_set;
    AtkObject *accessible_array[1];
    AtkRelation *relation;

    g_return_val_if_fail (EV_IS_PAGE_ACCESSIBLE (accessible), NULL);
    self = EV_PAGE_ACCESSIBLE (accessible);

    relation_set = ATK_OBJECT_CLASS (ev_page_accessible_parent_class)->ref_relation_set (accessible);
    if (relation_set == NULL)
        return NULL;

    n_pages = ev_view_accessible_get_n_pages (self->priv->view_accessible);
    if (n_pages == 0)
        return relation_set;

    if ((self->priv->page + 1) < n_pages && !atk_relation_set_contains (relation_set, ATK_RELATION_FLOWS_TO)) {
        AtkObject *next_page;

        next_page = atk_object_ref_accessible_child (ATK_OBJECT (self->priv->view_accessible),
                                 self->priv->page + 1);
        accessible_array [0] = next_page;
        relation = atk_relation_new (accessible_array, 1, ATK_RELATION_FLOWS_TO);
        atk_relation_set_add (relation_set, relation);

        g_object_unref (relation);
        g_object_unref (next_page);
    }

    if (self->priv->page > 0 && !atk_relation_set_contains (relation_set, ATK_RELATION_FLOWS_FROM)) {
        AtkObject *prev_page;

        prev_page = atk_object_ref_accessible_child (ATK_OBJECT (self->priv->view_accessible),
                                 self->priv->page - 1);
        accessible_array [0] = prev_page;
        relation = atk_relation_new (accessible_array, 1, ATK_RELATION_FLOWS_FROM);
        atk_relation_set_add (relation_set, relation);

        g_object_unref (relation);
        g_object_unref (prev_page);
    }

    return relation_set;
}

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static AtkStateSet* ev_page_accessible_ref_state_set ( AtkObject *  accessible)

static

Definition at line 277 of file ev-page-accessible.c.

{
    AtkStateSet *state_set;
    AtkStateSet *copy_set;
    AtkStateSet *view_accessible_state_set;
    EvPageAccessible *self;
    EvView *view;
    gint relevant_page;

    g_return_val_if_fail (EV_IS_PAGE_ACCESSIBLE (accessible), NULL);
    self = EV_PAGE_ACCESSIBLE (accessible);
    view = ev_page_accessible_get_view (self);

    state_set = ATK_OBJECT_CLASS (ev_page_accessible_parent_class)->ref_state_set (accessible);
    atk_state_set_clear_states (state_set);

    view_accessible_state_set = atk_object_ref_state_set (ATK_OBJECT (self->priv->view_accessible));
    copy_set = atk_state_set_or_sets (state_set, view_accessible_state_set);

    if (self->priv->page >= view->start_page && self->priv->page <= view->end_page)
        atk_state_set_add_state (copy_set, ATK_STATE_SHOWING);
    else
        atk_state_set_remove_state (copy_set, ATK_STATE_SHOWING);

    relevant_page = ev_view_accessible_get_relevant_page (self->priv->view_accessible);
    if (atk_state_set_contains_state (view_accessible_state_set, ATK_STATE_FOCUSED) &&
        self->priv->page == relevant_page)
        atk_state_set_add_state (copy_set, ATK_STATE_FOCUSED);
    else
        atk_state_set_remove_state (copy_set, ATK_STATE_FOCUSED);

    relevant_page = ev_view_accessible_get_relevant_page (self->priv->view_accessible);
    if (atk_state_set_contains_state (view_accessible_state_set, ATK_STATE_FOCUSED) &&
        self->priv->page == relevant_page)
        atk_state_set_add_state (copy_set, ATK_STATE_FOCUSED);
    else
        atk_state_set_remove_state (copy_set, ATK_STATE_FOCUSED);

    g_object_unref (state_set);
    g_object_unref (view_accessible_state_set);

    return copy_set;
}

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static gboolean ev_page_accessible_remove_selection ( AtkText *  text, gint  selection_num  )

static

Definition at line 995 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);

    if (ev_view_get_has_selection (view)) {
        _ev_view_clear_selection (view);
        return TRUE;
    }

    return FALSE;
}

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static gboolean ev_page_accessible_set_caret_offset ( AtkText *  text, gint  offset  )

static

Definition at line 620 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);

    ev_view_set_caret_cursor_position (view,
                       self->priv->page,
                       offset);

    return TRUE;
}

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static void ev_page_accessible_set_property ( GObject *  object, guint  prop_id, const GValue *  value, GParamSpec *  pspec  )

static

Definition at line 179 of file ev-page-accessible.c.

{
    EvPageAccessible *accessible = EV_PAGE_ACCESSIBLE (object);

    switch (prop_id) {
    case PROP_VIEW_ACCESSIBLE:
        accessible->priv->view_accessible = EV_VIEW_ACCESSIBLE (g_value_get_object (value));
        break;
    case PROP_PAGE:
        accessible->priv->page = g_value_get_int (value);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
    }
}

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static gboolean ev_page_accessible_set_selection ( AtkText *  text, gint  selection_num, gint  start_pos, gint  end_pos  )

static

Definition at line 1010 of file ev-page-accessible.c.

{
    EvPageAccessible *self = EV_PAGE_ACCESSIBLE (text);
    EvView *view = ev_page_accessible_get_view (self);
    EvRectangle *areas = NULL;
    guint n_areas = 0;
    GdkRectangle start_rect, end_rect;
    GdkPoint start_point, end_point;

    ev_page_cache_get_text_layout (view->page_cache, self->priv->page, &areas, &n_areas);
    if (start_pos < 0 || end_pos >= n_areas)
        return FALSE;

    _ev_view_transform_doc_rect_to_view_rect (view, self->priv->page, areas + start_pos, &start_rect);
    _ev_view_transform_doc_rect_to_view_rect (view, self->priv->page, areas + end_pos - 1, &end_rect);
    start_point.x = start_rect.x;
    start_point.y = start_rect.y;
    end_point.x = end_rect.x + end_rect.width;
    end_point.y = end_rect.y + end_rect.height;
    _ev_view_set_selection (view, &start_point, &end_point);

    return TRUE;
}

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static void ev_page_accessible_text_iface_init ( AtkTextIface *  iface)

static

Definition at line 1055 of file ev-page-accessible.c.

{
    iface->get_text = ev_page_accessible_get_text;
    iface->get_text_at_offset = ev_page_accessible_get_text_at_offset;
    iface->get_character_at_offset = ev_page_accessible_get_character_at_offset;
    iface->get_caret_offset = ev_page_accessible_get_caret_offset;
    iface->set_caret_offset = ev_page_accessible_set_caret_offset;
    iface->get_character_count = ev_page_accessible_get_character_count;
    iface->get_n_selections = ev_page_accessible_get_n_selections;
    iface->get_selection = ev_page_accessible_get_selection;
    iface->remove_selection = ev_page_accessible_remove_selection;
    iface->add_selection = ev_page_accessible_add_selection;
    iface->get_run_attributes = ev_page_accessible_get_run_attributes;
    iface->get_default_attributes = ev_page_accessible_get_default_attributes;
    iface->get_character_extents = ev_page_accessible_get_character_extents;
    iface->get_offset_at_point = ev_page_accessible_get_offset_at_point;
}

void ev_page_accessible_update_element_state	(	EvPageAccessible *	page_accessible,
		EvMapping *	mapping
	)

Definition at line 1269 of file ev-page-accessible.c.

{
    AtkObject *child;

    child = ev_page_accessible_get_accessible_for_mapping (page_accessible, mapping);
    if (!child)
        return;

    if (EV_IS_FORM_FIELD_ACCESSIBLE (child))
        ev_form_field_accessible_update_state (EV_FORM_FIELD_ACCESSIBLE (child));
}

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G_DEFINE_TYPE_WITH_CODE	(	EvPageAccessible	,
		ev_page_accessible	,
		ATK_TYPE_OBJECT	,
		G_IMPLEMENT_INTERFACE(ATK_TYPE_TEXT, ev_page_accessible_text_iface_init)
	)

Definition at line 51 of file ev-page-accessible.c.

{
    g_return_val_if_fail (EV_IS_PAGE_ACCESSIBLE (page_accessible), -1);

    return page_accessible->priv->page;
}

static AtkAttributeSet* get_run_attributes ( PangoAttrList *  attrs, const gchar *  text, gint  offset, gint *  start_offset, gint *  end_offset  )

static

Definition at line 776 of file ev-page-accessible.c.

{
    AtkAttributeSet   *atk_attr_set = NULL;
    PangoAttrString   *pango_string;
    PangoAttrInt      *pango_int;
    PangoAttrColor    *pango_color;
    PangoAttrIterator *iter;
    gint               i, start, end;
    gboolean           has_attrs = FALSE;
    glong              text_length;
    gchar             *attr_value;

    text_length = g_utf8_strlen (text, -1);
    if (offset < 0 || offset >= text_length)
        return NULL;

    /* Check if there are attributes for the offset,
     * and set the attributes range if positive */
    iter = pango_attr_list_get_iterator (attrs);
    i = g_utf8_offset_to_pointer (text, offset) - text;

    do {
        pango_attr_iterator_range (iter, &start, &end);
        if (i >= start && i < end) {
            *start_offset = g_utf8_pointer_to_offset (text, text + start);
            if (end == G_MAXINT) /* Last iterator */
                end = text_length;
            *end_offset = g_utf8_pointer_to_offset (text, text + end);
             has_attrs = TRUE;
        }
    } while (!has_attrs && pango_attr_iterator_next (iter));

    if (!has_attrs) {
        pango_attr_iterator_destroy (iter);
        return NULL;
    }

    /* Create the AtkAttributeSet from the Pango attributes */
    pango_string = (PangoAttrString *) pango_attr_iterator_get (iter, PANGO_ATTR_FAMILY);
    if (pango_string) {
        attr_value = g_strdup (pango_string->value);
        atk_attr_set = add_attribute (atk_attr_set, ATK_TEXT_ATTR_FAMILY_NAME, attr_value);
    }

    pango_int = (PangoAttrInt *) pango_attr_iterator_get (iter, PANGO_ATTR_SIZE);
    if (pango_int) {
        attr_value = g_strdup_printf ("%i", pango_int->value / PANGO_SCALE);
        atk_attr_set = add_attribute (atk_attr_set, ATK_TEXT_ATTR_SIZE, attr_value);
    }

    pango_int = (PangoAttrInt *) pango_attr_iterator_get (iter, PANGO_ATTR_UNDERLINE);
    if (pango_int) {
        atk_attr_set = add_attribute (atk_attr_set,
                          ATK_TEXT_ATTR_UNDERLINE,
                          g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_UNDERLINE,
                                              pango_int->value)));
    }

    pango_color = (PangoAttrColor *) pango_attr_iterator_get (iter, PANGO_ATTR_FOREGROUND);
    if (pango_color) {
        attr_value = g_strdup_printf ("%u,%u,%u",
                          pango_color->color.red,
                          pango_color->color.green,
                          pango_color->color.blue);
        atk_attr_set = add_attribute (atk_attr_set, ATK_TEXT_ATTR_FG_COLOR, attr_value);
    }

    pango_attr_iterator_destroy (iter);

    return atk_attr_set;
}

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static gboolean get_selection_bounds ( EvView *  view, EvViewSelection *  selection, gint *  start_offset, gint *  end_offset  )

static

Definition at line 645 of file ev-page-accessible.c.

{
    cairo_rectangle_int_t rect;
    gint start, end;

    if (!selection->covered_region || cairo_region_is_empty (selection->covered_region))
        return FALSE;

    cairo_region_get_rectangle (selection->covered_region, 0, &rect);
    start = _ev_view_get_caret_cursor_offset_at_doc_point (view,
                                   selection->page,
                                   rect.x / view->scale,
                                   (rect.y + (rect.height / 2)) / view->scale);
    if (start == -1)
        return FALSE;

    cairo_region_get_rectangle (selection->covered_region,
                    cairo_region_num_rectangles (selection->covered_region) - 1,
                    &rect);
    end = _ev_view_get_caret_cursor_offset_at_doc_point (view,
                                 selection->page,
                                 (rect.x + rect.width) / view->scale,
                                 (rect.y + (rect.height / 2)) / view->scale);
    if (end == -1)
        return FALSE;

    *start_offset = start;
    *end_offset = end;

    return TRUE;
}

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static void page_cached_cb ( EvPageCache *  cache, gint  page, EvPageAccessible *  self  )

static

Definition at line 1212 of file ev-page-accessible.c.

{
    if (page == self->priv->page)
        ev_page_accessible_initialize_children (self);
}

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static gboolean treat_as_soft_return ( EvView *  view, gint  page, PangoLogAttr *  log_attrs, gint  offset  )

static

Definition at line 399 of file ev-page-accessible.c.

{
    EvRectangle *areas = NULL;
    guint n_areas = 0;
    gdouble line_spacing, this_line_height, next_word_width;
    EvRectangle *this_line_start;
    EvRectangle *this_line_end;
    EvRectangle *next_line_start;
    EvRectangle *next_line_end;
    EvRectangle *next_word_end;
    gint prev_offset, next_offset;


    if (!log_attrs[offset].is_white)
        return FALSE;

    ev_page_cache_get_text_layout (view->page_cache, page, &areas, &n_areas);
    if (n_areas <= offset + 1)
        return FALSE;

    prev_offset = offset - 1;
    next_offset = offset + 1;

    /* In wrapped text, the character at the start of the next line starts a word.
     * Examples where this condition might fail include bullets and images. But it
     * also includes things like "(", so also check the next character.
     */
    if (!log_attrs[next_offset].is_word_start &&
        (next_offset + 1 >= n_areas || !log_attrs[next_offset + 1].is_word_start))
        return FALSE;

    /* In wrapped text, the chars on either side of the newline have very similar heights.
     * Examples where this condition might fail include a newline at the end of a heading,
     * and a newline at the end of a paragraph that is followed by a heading.
     */
    this_line_end = areas + prev_offset;
    next_line_start = areas + next_offset;;

    this_line_height = this_line_end->y2 - this_line_end->y1;
    if (ABS (this_line_height - (next_line_start->y2 - next_line_start->y1)) > 0.25)
        return FALSE;

    /* If there is significant white space between this line and the next, odds are this
     * is not a soft return in wrapped text. Lines within a typical paragraph are at most
     * double-spaced. If the spacing is more than that, assume a hard return is present.
     */
    line_spacing = next_line_start->y1 - this_line_end->y2;
    if (line_spacing - this_line_height > 1)
        return FALSE;

    /* Lines within a typical paragraph have *reasonably* similar x1 coordinates. But
     * we cannot count on them being nearly identical. Examples where indentation can
     * be present in wrapped text include indenting the first line of the paragraph,
     * and hanging indents (e.g. in the works cited within an academic paper). So we'll
     * be somewhat tolerant here.
     */
    for ( ; prev_offset > 0 && !log_attrs[prev_offset].is_mandatory_break; prev_offset--);
    this_line_start = areas + prev_offset;
    if (ABS (this_line_start->x1 - next_line_start->x1) > 20)
        return FALSE;

    /* Ditto for x2, but this line might be short due to a wide word on the next line. */
    for ( ; next_offset < n_areas && !log_attrs[next_offset].is_word_end; next_offset++);
    next_word_end = areas + next_offset;
    next_word_width = next_word_end->x2 - next_line_start->x1;

    for ( ; next_offset < n_areas && !log_attrs[next_offset + 1].is_mandatory_break; next_offset++);
    next_line_end = areas + next_offset;
    if (next_line_end->x2 - (this_line_end->x2 + next_word_width) > 20)
        return FALSE;

    return TRUE;
}

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