| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "flutter/shell/platform/linux/fl_view_accessible.h" |
| #include "flutter/shell/platform/linux/fl_accessible_node.h" |
| #include "flutter/shell/platform/linux/public/flutter_linux/fl_view.h" |
| |
| struct _FlViewAccessible { |
| GtkContainerAccessible parent_instance; |
| |
| // Semantics nodes keyed by ID |
| GHashTable* semantics_nodes_by_id; |
| }; |
| |
| G_DEFINE_TYPE(FlViewAccessible, |
| fl_view_accessible, |
| GTK_TYPE_CONTAINER_ACCESSIBLE) |
| |
| // Gets the ATK node for the given id. |
| // If the node doesn't exist it will be created. |
| static FlAccessibleNode* get_node(FlViewAccessible* self, int32_t id) { |
| FlAccessibleNode* node = FL_ACCESSIBLE_NODE( |
| g_hash_table_lookup(self->semantics_nodes_by_id, GINT_TO_POINTER(id))); |
| if (node != nullptr) { |
| return node; |
| } |
| |
| FlView* view = FL_VIEW(gtk_accessible_get_widget(GTK_ACCESSIBLE(self))); |
| node = fl_accessible_node_new(fl_view_get_engine(view), id); |
| if (id == 0) { |
| fl_accessible_node_set_parent(node, ATK_OBJECT(self)); |
| } |
| g_hash_table_insert(self->semantics_nodes_by_id, GINT_TO_POINTER(id), |
| reinterpret_cast<gpointer>(node)); |
| |
| return node; |
| } |
| |
| // Implements AtkObject::get_n_children |
| static gint fl_view_accessible_get_n_children(AtkObject* accessible) { |
| return 1; |
| } |
| |
| // Implements AtkObject::ref_child |
| static AtkObject* fl_view_accessible_ref_child(AtkObject* accessible, gint i) { |
| FlViewAccessible* self = FL_VIEW_ACCESSIBLE(accessible); |
| |
| if (i != 0) { |
| return nullptr; |
| } |
| |
| FlAccessibleNode* node = get_node(self, 0); |
| return ATK_OBJECT(g_object_ref(node)); |
| } |
| |
| // Implements AtkObject::get_role |
| static AtkRole fl_view_accessible_get_role(AtkObject* accessible) { |
| return ATK_ROLE_FRAME; |
| } |
| |
| static void fl_view_accessible_class_init(FlViewAccessibleClass* klass) { |
| 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; |
| } |
| |
| static void fl_view_accessible_init(FlViewAccessible* self) { |
| self->semantics_nodes_by_id = g_hash_table_new_full( |
| g_direct_hash, g_direct_equal, nullptr, g_object_unref); |
| } |
| |
| void fl_view_accessible_handle_update_semantics_node( |
| FlViewAccessible* self, |
| const FlutterSemanticsNode* node) { |
| if (node->id == kFlutterSemanticsCustomActionIdBatchEnd) { |
| return; |
| } |
| |
| FlAccessibleNode* atk_node = get_node(self, node->id); |
| |
| 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); |
| |
| g_autoptr(GPtrArray) children = g_ptr_array_new(); |
| for (size_t i = 0; i < node->child_count; i++) { |
| FlAccessibleNode* child = |
| get_node(self, node->children_in_traversal_order[i]); |
| fl_accessible_node_set_parent(child, ATK_OBJECT(atk_node)); |
| g_ptr_array_add(children, child); |
| } |
| fl_accessible_node_set_children(atk_node, children); |
| } |