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