fl_view_accessible.cc File Reference

#include "flutter/shell/platform/linux/fl_view_accessible.h"
#include "flutter/shell/platform/linux/fl_accessible_node.h"
#include "flutter/shell/platform/linux/fl_accessible_text_field.h"
#include "flutter/shell/platform/linux/public/flutter_linux/fl_value.h"
#include "flutter/shell/platform/linux/public/flutter_linux/fl_view.h"

Go to the source code of this file.

Classes
struct	_FlViewAccessible

Enumerations
enum	{   kProp0,   kPropEngine,   kPropLast }

Functions
static FlAccessibleNode *	create_node (FlViewAccessible *self, FlutterSemanticsNode2 *semantics)
static FlAccessibleNode *	lookup_node (FlViewAccessible *self, int32_t id)
static FlAccessibleNode *	get_node (FlViewAccessible *self, FlutterSemanticsNode2 *semantics)
static gint	fl_view_accessible_get_n_children (AtkObject *accessible)
static AtkObject *	fl_view_accessible_ref_child (AtkObject *accessible, gint i)
static AtkRole	fl_view_accessible_get_role (AtkObject *accessible)
static AtkStateSet *	fl_view_accessible_ref_state_set (AtkObject *accessible)
static void	fl_view_accessible_dispose (GObject *object)
static void	fl_view_accessible_class_init (FlViewAccessibleClass *klass)
static void	fl_view_accessible_init (FlViewAccessible *self)
FlViewAccessible *	fl_view_accessible_new (FlEngine *engine)
void	fl_view_accessible_handle_update_semantics (FlViewAccessible *self, const FlutterSemanticsUpdate2 *update)

Variables
static constexpr int32_t	kRootSemanticsNodeId = 0

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
kProp0
kPropEngine
kPropLast

Definition at line 25 of file fl_view_accessible.cc.

{ kProp0, kPropEngine, kPropLast };

Function Documentation

create_node()

static FlAccessibleNode* create_node ( FlViewAccessible *  self, FlutterSemanticsNode2 *  semantics  )

static

Definition at line 29 of file fl_view_accessible.cc.

                                                                       {
  if (semantics->flags & kFlutterSemanticsFlagIsTextField) {
    return fl_accessible_text_field_new(self->engine, semantics->id);
  }
 
  return fl_accessible_node_new(self->engine, semantics->id);
}

References fl_accessible_node_new(), and fl_accessible_text_field_new().

Referenced by get_node().

fl_view_accessible_class_init()

static void fl_view_accessible_class_init ( FlViewAccessibleClass *  klass )

static

Definition at line 119 of file fl_view_accessible.cc.

                                                                        {
  ATK_OBJECT_CLASS(klass)->get_n_children = fl_view_accessible_get_n_children;
  ATK_OBJECT_CLASS(klass)->ref_child = fl_view_accessible_ref_child;
  ATK_OBJECT_CLASS(klass)->get_role = fl_view_accessible_get_role;
  ATK_OBJECT_CLASS(klass)->ref_state_set = fl_view_accessible_ref_state_set;
 
  G_OBJECT_CLASS(klass)->dispose = fl_view_accessible_dispose;
}

References fl_view_accessible_dispose(), fl_view_accessible_get_n_children(), fl_view_accessible_get_role(), fl_view_accessible_ref_child(), and fl_view_accessible_ref_state_set().

fl_view_accessible_dispose()

static void fl_view_accessible_dispose ( GObject *  object )

static

Definition at line 105 of file fl_view_accessible.cc.

                                                        {
  FlViewAccessible* self = FL_VIEW_ACCESSIBLE(object);
 
  g_clear_pointer(&self->semantics_nodes_by_id, g_hash_table_unref);
 
  if (self->engine != nullptr) {
    g_object_remove_weak_pointer(object,
                                 reinterpret_cast<gpointer*>(&self->engine));
    self->engine = nullptr;
  }
 
  G_OBJECT_CLASS(fl_view_accessible_parent_class)->dispose(object);
}

Referenced by fl_view_accessible_class_init().

fl_view_accessible_get_n_children()

static gint fl_view_accessible_get_n_children ( AtkObject *  accessible )

static

Definition at line 70 of file fl_view_accessible.cc.

                                                                     {
  FlViewAccessible* self = FL_VIEW_ACCESSIBLE(accessible);
  FlAccessibleNode* node = lookup_node(self, 0);
 
  if (node == nullptr) {
    return 0;
  }
 
  return 1;
}

References lookup_node().

Referenced by fl_view_accessible_class_init().

fl_view_accessible_get_role()

static AtkRole fl_view_accessible_get_role ( AtkObject *  accessible )

static

Definition at line 94 of file fl_view_accessible.cc.

                                                                  {
  return ATK_ROLE_PANEL;
}

Referenced by fl_view_accessible_class_init().

fl_view_accessible_handle_update_semantics()

void fl_view_accessible_handle_update_semantics	(	FlViewAccessible *	accessible,
		const FlutterSemanticsUpdate2 *	update
	)

fl_view_accessible_handle_update_semantics: @accessible: an #FlViewAccessible. @update: semantic update information.

Handle a semantics update from Flutter.

Definition at line 142 of file fl_view_accessible.cc.

                                           {
  g_autoptr(GHashTable) pending_children =
      g_hash_table_new_full(g_direct_hash, g_direct_equal, nullptr,
                            reinterpret_cast<GDestroyNotify>(fl_value_unref));
  for (size_t i = 0; i < update->node_count; i++) {
    FlutterSemanticsNode2* node = update->nodes[i];
    FlAccessibleNode* atk_node = get_node(self, node);
 
    fl_accessible_node_set_flags(atk_node, node->flags);
    fl_accessible_node_set_actions(atk_node, node->actions);
    fl_accessible_node_set_name(atk_node, node->label);
    fl_accessible_node_set_extents(
        atk_node, node->rect.left + node->transform.transX,
        node->rect.top + node->transform.transY,
        node->rect.right - node->rect.left, node->rect.bottom - node->rect.top);
    fl_accessible_node_set_value(atk_node, node->value);
    fl_accessible_node_set_text_selection(atk_node, node->text_selection_base,
                                          node->text_selection_extent);
    fl_accessible_node_set_text_direction(atk_node, node->text_direction);
 
    FlValue* children = fl_value_new_int32_list(
        node->children_in_traversal_order, node->child_count);
    g_hash_table_insert(pending_children, atk_node, children);
  }
 
  g_hash_table_foreach_remove(
      pending_children,
      [](gpointer key, gpointer value, gpointer user_data) -> gboolean {
        FlViewAccessible* self = FL_VIEW_ACCESSIBLE(user_data);
 
        FlAccessibleNode* parent = FL_ACCESSIBLE_NODE(key);
 
        size_t child_count = fl_value_get_length(static_cast<FlValue*>(value));
        const int32_t* children_in_traversal_order =
            fl_value_get_int32_list(static_cast<FlValue*>(value));
 
        g_autoptr(GPtrArray) children = g_ptr_array_new();
        for (size_t i = 0; i < child_count; i++) {
          FlAccessibleNode* child =
              lookup_node(self, children_in_traversal_order[i]);
          g_assert(child != nullptr);
          fl_accessible_node_set_parent(child, ATK_OBJECT(parent), i);
          g_ptr_array_add(children, child);
        }
        fl_accessible_node_set_children(parent, children);
 
        return true;
      },
      self);
}

References fl_accessible_node_set_actions(), fl_accessible_node_set_children(), fl_accessible_node_set_extents(), fl_accessible_node_set_flags(), fl_accessible_node_set_name(), fl_accessible_node_set_parent(), fl_accessible_node_set_text_direction(), fl_accessible_node_set_text_selection(), fl_accessible_node_set_value(), fl_value_get_int32_list(), fl_value_get_length(), fl_value_new_int32_list(), fl_value_unref(), get_node(), i, lookup_node(), user_data, and value.

Referenced by TEST(), and update_semantics_cb().

fl_view_accessible_init()

static void fl_view_accessible_init ( FlViewAccessible *  self )

static

Definition at line 128 of file fl_view_accessible.cc.

                                                            {
  self->semantics_nodes_by_id = g_hash_table_new_full(
      g_direct_hash, g_direct_equal, nullptr, g_object_unref);
}

fl_view_accessible_new()

FlViewAccessible* fl_view_accessible_new

(

FlEngine *

engine

)

Definition at line 133 of file fl_view_accessible.cc.

                                                           {
  FlViewAccessible* self =
      FL_VIEW_ACCESSIBLE(g_object_new(fl_view_accessible_get_type(), nullptr));
  self->engine = engine;
  g_object_add_weak_pointer(G_OBJECT(self),
                            reinterpret_cast<gpointer*>(&self->engine));
  return self;
}

Referenced by realize_cb(), and TEST().

fl_view_accessible_ref_child()

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

static

Definition at line 82 of file fl_view_accessible.cc.

                                                                              {
  FlViewAccessible* self = FL_VIEW_ACCESSIBLE(accessible);
  FlAccessibleNode* node = lookup_node(self, 0);
 
  if (i != 0 || node == nullptr) {
    return nullptr;
  }
 
  return ATK_OBJECT(g_object_ref(node));
}

References i, and lookup_node().

Referenced by fl_view_accessible_class_init().

fl_view_accessible_ref_state_set()

static AtkStateSet* fl_view_accessible_ref_state_set ( AtkObject *  accessible )

static

Definition at line 99 of file fl_view_accessible.cc.

                                                                            {
  FlViewAccessible* self = FL_VIEW_ACCESSIBLE(accessible);
  FlAccessibleNode* node = lookup_node(self, 0);
  return node != nullptr ? atk_object_ref_state_set(ATK_OBJECT(node)) : nullptr;
}

References lookup_node().

Referenced by fl_view_accessible_class_init().

get_node()

static FlAccessibleNode* get_node ( FlViewAccessible *  self, FlutterSemanticsNode2 *  semantics  )

static

Definition at line 45 of file fl_view_accessible.cc.

                                                                    {
  FlAccessibleNode* node = lookup_node(self, semantics->id);
  if (node != nullptr) {
    return node;
  }
 
  node = create_node(self, semantics);
  if (semantics->id == kRootSemanticsNodeId) {
    fl_accessible_node_set_parent(node, ATK_OBJECT(self), 0);
  }
  g_hash_table_insert(self->semantics_nodes_by_id,
                      GINT_TO_POINTER(semantics->id),
                      reinterpret_cast<gpointer>(node));
 
  // Update when root node is created.
  if (!self->root_node_created && semantics->id == kRootSemanticsNodeId) {
    g_signal_emit_by_name(self, "children-changed::add", 0, node, nullptr);
    self->root_node_created = true;
  }
 
  return node;
}

References create_node(), fl_accessible_node_set_parent(), kRootSemanticsNodeId, and lookup_node().

Referenced by fl_view_accessible_handle_update_semantics().

lookup_node()

static FlAccessibleNode* lookup_node ( FlViewAccessible *  self, int32_t  id  )

static

Definition at line 38 of file fl_view_accessible.cc.

                                                                         {
  return FL_ACCESSIBLE_NODE(
      g_hash_table_lookup(self->semantics_nodes_by_id, GINT_TO_POINTER(id)));
}

Referenced by fl_view_accessible_get_n_children(), fl_view_accessible_handle_update_semantics(), fl_view_accessible_ref_child(), fl_view_accessible_ref_state_set(), and get_node().

Variable Documentation

kRootSemanticsNodeId

constexpr int32_t kRootSemanticsNodeId = 0

staticconstexpr

Definition at line 11 of file fl_view_accessible.cc.

Referenced by get_node().