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d95794ec8a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see".
380 lines
14 KiB
C++
380 lines
14 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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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 = _get_owner_node_theme(owner_node);
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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 = _get_owner_node_theme(owner_node);
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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 = _get_owner_node_theme(owner_node);
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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 = _get_owner_node_theme(owner_node);
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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 = _get_owner_node_theme(owner_node);
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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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Ref<Theme> ThemeOwner::_get_owner_node_theme(Node *p_owner_node) const {
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const Control *owner_c = Object::cast_to<Control>(p_owner_node);
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if (owner_c) {
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return owner_c->get_theme();
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}
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const Window *owner_w = Object::cast_to<Window>(p_owner_node);
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if (owner_w) {
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return owner_w->get_theme();
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}
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return Ref<Theme>();
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}
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