/*************************************************************************/ /* theme_owner.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #include "theme_owner.h" #include "scene/gui/control.h" #include "scene/main/window.h" #include "scene/theme/theme_db.h" // Theme owner node. void ThemeOwner::set_owner_node(Node *p_node) { owner_control = nullptr; owner_window = nullptr; Control *c = Object::cast_to<Control>(p_node); if (c) { owner_control = c; return; } Window *w = Object::cast_to<Window>(p_node); if (w) { owner_window = w; return; } } Node *ThemeOwner::get_owner_node() const { if (owner_control) { return owner_control; } else if (owner_window) { return owner_window; } return nullptr; } bool ThemeOwner::has_owner_node() const { return bool(owner_control || owner_window); } // Theme propagation. void ThemeOwner::assign_theme_on_parented(Node *p_for_node) { // We check if there are any themes affecting the parent. If that's the case // its children also need to be affected. // We don't notify here because `NOTIFICATION_THEME_CHANGED` will be handled // a bit later by `NOTIFICATION_ENTER_TREE`. Node *parent = p_for_node->get_parent(); Control *parent_c = Object::cast_to<Control>(parent); if (parent_c && parent_c->has_theme_owner_node()) { propagate_theme_changed(p_for_node, parent_c->get_theme_owner_node(), false, true); } else { Window *parent_w = Object::cast_to<Window>(parent); if (parent_w && parent_w->has_theme_owner_node()) { propagate_theme_changed(p_for_node, parent_w->get_theme_owner_node(), false, true); } } } void ThemeOwner::clear_theme_on_unparented(Node *p_for_node) { // We check if there were any themes affecting the parent. If that's the case // its children need were also affected and need to be updated. // We don't notify because we're exiting the tree, and it's not important. Node *parent = p_for_node->get_parent(); Control *parent_c = Object::cast_to<Control>(parent); if (parent_c && parent_c->has_theme_owner_node()) { propagate_theme_changed(p_for_node, nullptr, false, true); } else { Window *parent_w = Object::cast_to<Window>(parent); if (parent_w && parent_w->has_theme_owner_node()) { propagate_theme_changed(p_for_node, nullptr, false, true); } } } void ThemeOwner::propagate_theme_changed(Node *p_to_node, Node *p_owner_node, bool p_notify, bool p_assign) { Control *c = Object::cast_to<Control>(p_to_node); Window *w = c == nullptr ? Object::cast_to<Window>(p_to_node) : nullptr; if (!c && !w) { // Theme inheritance chains are broken by nodes that aren't Control or Window. return; } bool assign = p_assign; if (c) { if (c != p_owner_node && c->get_theme().is_valid()) { // Has a theme, so we don't want to change the theme owner, // but we still want to propagate in case this child has theme items // it inherits from the theme this node uses. // See https://github.com/godotengine/godot/issues/62844. assign = false; } if (assign) { c->set_theme_owner_node(p_owner_node); } if (p_notify) { c->notification(Control::NOTIFICATION_THEME_CHANGED); } } else if (w) { if (w != p_owner_node && w->get_theme().is_valid()) { // Same as above. assign = false; } if (assign) { w->set_theme_owner_node(p_owner_node); } if (p_notify) { w->notification(Window::NOTIFICATION_THEME_CHANGED); } } for (int i = 0; i < p_to_node->get_child_count(); i++) { propagate_theme_changed(p_to_node->get_child(i), p_owner_node, p_notify, assign); } } // Theme lookup. void ThemeOwner::get_theme_type_dependencies(const Node *p_for_node, const StringName &p_theme_type, List<StringName> *r_list) const { const Control *for_c = Object::cast_to<Control>(p_for_node); const Window *for_w = Object::cast_to<Window>(p_for_node); ERR_FAIL_COND_MSG(!for_c && !for_w, "Only Control and Window nodes and derivatives can be polled for theming."); Ref<Theme> default_theme = ThemeDB::get_singleton()->get_default_theme(); Ref<Theme> project_theme = ThemeDB::get_singleton()->get_project_theme(); StringName type_variation; if (for_c) { type_variation = for_c->get_theme_type_variation(); } else if (for_w) { type_variation = for_w->get_theme_type_variation(); } if (p_theme_type == StringName() || p_theme_type == p_for_node->get_class_name() || p_theme_type == type_variation) { if (project_theme.is_valid() && project_theme->get_type_variation_base(type_variation) != StringName()) { project_theme->get_type_dependencies(p_for_node->get_class_name(), type_variation, r_list); } else { default_theme->get_type_dependencies(p_for_node->get_class_name(), type_variation, r_list); } } else { default_theme->get_type_dependencies(p_theme_type, StringName(), r_list); } } Node *ThemeOwner::_get_next_owner_node(Node *p_from_node) const { Node *parent = p_from_node->get_parent(); Control *parent_c = Object::cast_to<Control>(parent); if (parent_c) { return parent_c->get_theme_owner_node(); } else { Window *parent_w = Object::cast_to<Window>(parent); if (parent_w) { return parent_w->get_theme_owner_node(); } } return nullptr; } Variant ThemeOwner::get_theme_item_in_types(Theme::DataType p_data_type, const StringName &p_name, List<StringName> p_theme_types) { ERR_FAIL_COND_V_MSG(p_theme_types.size() == 0, Variant(), "At least one theme type must be specified."); // First, look through each control or window node in the branch, until no valid parent can be found. // Only nodes with a theme resource attached are considered. Node *owner_node = get_owner_node(); while (owner_node) { // For each theme resource check the theme types provided and see if p_name exists with any of them. for (const StringName &E : p_theme_types) { Ref<Theme> owner_theme; Control *owner_c = Object::cast_to<Control>(owner_node); if (owner_c) { owner_theme = owner_c->get_theme(); } Window *owner_w = Object::cast_to<Window>(owner_node); if (owner_w) { owner_theme = owner_w->get_theme(); } if (owner_theme.is_valid() && owner_theme->has_theme_item(p_data_type, p_name, E)) { return owner_theme->get_theme_item(p_data_type, p_name, E); } } owner_node = _get_next_owner_node(owner_node); } // Secondly, check the project-defined Theme resource. if (ThemeDB::get_singleton()->get_project_theme().is_valid()) { for (const StringName &E : p_theme_types) { if (ThemeDB::get_singleton()->get_project_theme()->has_theme_item(p_data_type, p_name, E)) { return ThemeDB::get_singleton()->get_project_theme()->get_theme_item(p_data_type, p_name, E); } } } // Lastly, fall back on the items defined in the default Theme, if they exist. for (const StringName &E : p_theme_types) { if (ThemeDB::get_singleton()->get_default_theme()->has_theme_item(p_data_type, p_name, E)) { return ThemeDB::get_singleton()->get_default_theme()->get_theme_item(p_data_type, p_name, E); } } // If they don't exist, use any type to return the default/empty value. return ThemeDB::get_singleton()->get_default_theme()->get_theme_item(p_data_type, p_name, p_theme_types[0]); } bool ThemeOwner::has_theme_item_in_types(Theme::DataType p_data_type, const StringName &p_name, List<StringName> p_theme_types) { ERR_FAIL_COND_V_MSG(p_theme_types.size() == 0, false, "At least one theme type must be specified."); // First, look through each control or window node in the branch, until no valid parent can be found. // Only nodes with a theme resource attached are considered. Node *owner_node = get_owner_node(); while (owner_node) { // For each theme resource check the theme types provided and see if p_name exists with any of them. for (const StringName &E : p_theme_types) { Ref<Theme> owner_theme; Control *owner_c = Object::cast_to<Control>(owner_node); if (owner_c) { owner_theme = owner_c->get_theme(); } Window *owner_w = Object::cast_to<Window>(owner_node); if (owner_w) { owner_theme = owner_w->get_theme(); } if (owner_theme.is_valid() && owner_theme->has_theme_item(p_data_type, p_name, E)) { return true; } } owner_node = _get_next_owner_node(owner_node); } // Secondly, check the project-defined Theme resource. if (ThemeDB::get_singleton()->get_project_theme().is_valid()) { for (const StringName &E : p_theme_types) { if (ThemeDB::get_singleton()->get_project_theme()->has_theme_item(p_data_type, p_name, E)) { return true; } } } // Lastly, fall back on the items defined in the default Theme, if they exist. for (const StringName &E : p_theme_types) { if (ThemeDB::get_singleton()->get_default_theme()->has_theme_item(p_data_type, p_name, E)) { return true; } } return false; } float ThemeOwner::get_theme_default_base_scale() { // First, look through each control or window node in the branch, until no valid parent can be found. // Only nodes with a theme resource attached are considered. // For each theme resource see if their assigned theme has the default value defined and valid. Node *owner_node = get_owner_node(); while (owner_node) { Ref<Theme> owner_theme; Control *owner_c = Object::cast_to<Control>(owner_node); if (owner_c) { owner_theme = owner_c->get_theme(); } Window *owner_w = Object::cast_to<Window>(owner_node); if (owner_w) { owner_theme = owner_w->get_theme(); } if (owner_theme.is_valid() && owner_theme->has_default_base_scale()) { return owner_theme->get_default_base_scale(); } owner_node = _get_next_owner_node(owner_node); } // Secondly, check the project-defined Theme resource. if (ThemeDB::get_singleton()->get_project_theme().is_valid()) { if (ThemeDB::get_singleton()->get_project_theme()->has_default_base_scale()) { return ThemeDB::get_singleton()->get_project_theme()->get_default_base_scale(); } } // Lastly, fall back on the default Theme. if (ThemeDB::get_singleton()->get_default_theme()->has_default_base_scale()) { return ThemeDB::get_singleton()->get_default_theme()->get_default_base_scale(); } return ThemeDB::get_singleton()->get_fallback_base_scale(); } Ref<Font> ThemeOwner::get_theme_default_font() { // First, look through each control or window node in the branch, until no valid parent can be found. // Only nodes with a theme resource attached are considered. // For each theme resource see if their assigned theme has the default value defined and valid. Node *owner_node = get_owner_node(); while (owner_node) { Ref<Theme> owner_theme; Control *owner_c = Object::cast_to<Control>(owner_node); if (owner_c) { owner_theme = owner_c->get_theme(); } Window *owner_w = Object::cast_to<Window>(owner_node); if (owner_w) { owner_theme = owner_w->get_theme(); } if (owner_theme.is_valid() && owner_theme->has_default_font()) { return owner_theme->get_default_font(); } owner_node = _get_next_owner_node(owner_node); } // Secondly, check the project-defined Theme resource. if (ThemeDB::get_singleton()->get_project_theme().is_valid()) { if (ThemeDB::get_singleton()->get_project_theme()->has_default_font()) { return ThemeDB::get_singleton()->get_project_theme()->get_default_font(); } } // Lastly, fall back on the default Theme. if (ThemeDB::get_singleton()->get_default_theme()->has_default_font()) { return ThemeDB::get_singleton()->get_default_theme()->get_default_font(); } return ThemeDB::get_singleton()->get_fallback_font(); } int ThemeOwner::get_theme_default_font_size() { // First, look through each control or window node in the branch, until no valid parent can be found. // Only nodes with a theme resource attached are considered. // For each theme resource see if their assigned theme has the default value defined and valid. Node *owner_node = get_owner_node(); while (owner_node) { Ref<Theme> owner_theme; Control *owner_c = Object::cast_to<Control>(owner_node); if (owner_c) { owner_theme = owner_c->get_theme(); } Window *owner_w = Object::cast_to<Window>(owner_node); if (owner_w) { owner_theme = owner_w->get_theme(); } if (owner_theme.is_valid() && owner_theme->has_default_font_size()) { return owner_theme->get_default_font_size(); } owner_node = _get_next_owner_node(owner_node); } // Secondly, check the project-defined Theme resource. if (ThemeDB::get_singleton()->get_project_theme().is_valid()) { if (ThemeDB::get_singleton()->get_project_theme()->has_default_font_size()) { return ThemeDB::get_singleton()->get_project_theme()->get_default_font_size(); } } // Lastly, fall back on the default Theme. if (ThemeDB::get_singleton()->get_default_theme()->has_default_font_size()) { return ThemeDB::get_singleton()->get_default_theme()->get_default_font_size(); } return ThemeDB::get_singleton()->get_fallback_font_size(); }