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https://github.com/godotengine/godot.git
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443 lines
10 KiB
C++
443 lines
10 KiB
C++
/*************************************************************************/
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/* node_path.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 "node_path.h"
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#include "core/print_string.h"
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void NodePath::_update_hash_cache() const {
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uint32_t h = data->absolute ? 1 : 0;
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int pc = data->path.size();
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const StringName *sn = data->path.ptr();
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for (int i = 0; i < pc; i++) {
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h = h ^ sn[i].hash();
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}
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int spc = data->subpath.size();
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const StringName *ssn = data->subpath.ptr();
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for (int i = 0; i < spc; i++) {
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h = h ^ ssn[i].hash();
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}
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data->hash_cache_valid = true;
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data->hash_cache = h;
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}
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void NodePath::prepend_period() {
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if (data->path.size() && data->path[0].operator String() != ".") {
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data->path.insert(0, ".");
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data->hash_cache_valid = false;
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}
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}
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bool NodePath::is_absolute() const {
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if (!data) {
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return false;
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}
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return data->absolute;
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}
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int NodePath::get_name_count() const {
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if (!data) {
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return 0;
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}
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return data->path.size();
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}
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StringName NodePath::get_name(int p_idx) const {
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ERR_FAIL_COND_V(!data, StringName());
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ERR_FAIL_INDEX_V(p_idx, data->path.size(), StringName());
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return data->path[p_idx];
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}
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int NodePath::get_subname_count() const {
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if (!data) {
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return 0;
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}
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return data->subpath.size();
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}
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StringName NodePath::get_subname(int p_idx) const {
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ERR_FAIL_COND_V(!data, StringName());
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ERR_FAIL_INDEX_V(p_idx, data->subpath.size(), StringName());
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return data->subpath[p_idx];
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}
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void NodePath::unref() {
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if (data && data->refcount.unref()) {
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memdelete(data);
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}
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data = nullptr;
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}
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bool NodePath::operator==(const NodePath &p_path) const {
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if (data == p_path.data) {
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return true;
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}
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if (!data || !p_path.data) {
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return false;
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}
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if (data->absolute != p_path.data->absolute) {
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return false;
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}
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int path_size = data->path.size();
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if (path_size != p_path.data->path.size()) {
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return false;
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}
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int subpath_size = data->subpath.size();
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if (subpath_size != p_path.data->subpath.size()) {
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return false;
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}
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const StringName *l_path_ptr = data->path.ptr();
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const StringName *r_path_ptr = p_path.data->path.ptr();
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for (int i = 0; i < path_size; i++) {
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if (l_path_ptr[i] != r_path_ptr[i]) {
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return false;
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}
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}
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const StringName *l_subpath_ptr = data->subpath.ptr();
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const StringName *r_subpath_ptr = p_path.data->subpath.ptr();
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for (int i = 0; i < subpath_size; i++) {
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if (l_subpath_ptr[i] != r_subpath_ptr[i]) {
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return false;
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}
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}
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return true;
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}
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bool NodePath::operator!=(const NodePath &p_path) const {
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return (!(*this == p_path));
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}
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void NodePath::operator=(const NodePath &p_path) {
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if (this == &p_path) {
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return;
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}
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unref();
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if (p_path.data && p_path.data->refcount.ref()) {
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data = p_path.data;
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}
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}
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NodePath::operator String() const {
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if (!data) {
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return String();
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}
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String ret;
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if (data->absolute) {
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ret = "/";
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}
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for (int i = 0; i < data->path.size(); i++) {
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if (i > 0) {
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ret += "/";
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}
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ret += data->path[i].operator String();
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}
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for (int i = 0; i < data->subpath.size(); i++) {
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ret += ":" + data->subpath[i].operator String();
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}
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return ret;
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}
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NodePath::NodePath(const NodePath &p_path) {
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data = nullptr;
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if (p_path.data && p_path.data->refcount.ref()) {
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data = p_path.data;
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}
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}
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Vector<StringName> NodePath::get_names() const {
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if (data) {
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return data->path;
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}
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return Vector<StringName>();
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}
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Vector<StringName> NodePath::get_subnames() const {
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if (data) {
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return data->subpath;
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}
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return Vector<StringName>();
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}
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StringName NodePath::get_concatenated_subnames() const {
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ERR_FAIL_COND_V(!data, StringName());
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if (!data->concatenated_subpath) {
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int spc = data->subpath.size();
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String concatenated;
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const StringName *ssn = data->subpath.ptr();
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for (int i = 0; i < spc; i++) {
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concatenated += i == 0 ? ssn[i].operator String() : ":" + ssn[i];
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}
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data->concatenated_subpath = concatenated;
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}
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return data->concatenated_subpath;
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}
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NodePath NodePath::rel_path_to(const NodePath &p_np) const {
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ERR_FAIL_COND_V(!is_absolute(), NodePath());
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ERR_FAIL_COND_V(!p_np.is_absolute(), NodePath());
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Vector<StringName> src_dirs = get_names();
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Vector<StringName> dst_dirs = p_np.get_names();
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//find common parent
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int common_parent = 0;
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while (true) {
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if (src_dirs.size() == common_parent) {
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break;
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}
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if (dst_dirs.size() == common_parent) {
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break;
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}
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if (src_dirs[common_parent] != dst_dirs[common_parent]) {
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break;
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}
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common_parent++;
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}
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common_parent--;
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Vector<StringName> relpath;
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relpath.resize(src_dirs.size() + dst_dirs.size() + 1);
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StringName *relpath_ptr = relpath.ptrw();
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int path_size = 0;
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StringName back_str("..");
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for (int i = common_parent + 1; i < src_dirs.size(); i++) {
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relpath_ptr[path_size++] = back_str;
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}
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for (int i = common_parent + 1; i < dst_dirs.size(); i++) {
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relpath_ptr[path_size++] = dst_dirs[i];
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}
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if (path_size == 0) {
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relpath_ptr[path_size++] = ".";
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}
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relpath.resize(path_size);
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return NodePath(relpath, p_np.get_subnames(), false);
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}
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NodePath NodePath::get_as_property_path() const {
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if (!data || !data->path.size()) {
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return *this;
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} else {
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Vector<StringName> new_path = data->subpath;
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String initial_subname = data->path[0];
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for (int i = 1; i < data->path.size(); i++) {
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initial_subname += "/" + data->path[i];
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}
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new_path.insert(0, initial_subname);
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return NodePath(Vector<StringName>(), new_path, false);
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}
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}
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NodePath::NodePath(const Vector<StringName> &p_path, bool p_absolute) {
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data = nullptr;
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if (p_path.size() == 0) {
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return;
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}
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data = memnew(Data);
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data->refcount.init();
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data->absolute = p_absolute;
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data->path = p_path;
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data->has_slashes = true;
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data->hash_cache_valid = false;
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}
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NodePath::NodePath(const Vector<StringName> &p_path, const Vector<StringName> &p_subpath, bool p_absolute) {
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data = nullptr;
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if (p_path.size() == 0 && p_subpath.size() == 0) {
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return;
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}
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data = memnew(Data);
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data->refcount.init();
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data->absolute = p_absolute;
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data->path = p_path;
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data->subpath = p_subpath;
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data->has_slashes = true;
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data->hash_cache_valid = false;
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}
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void NodePath::simplify() {
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if (!data) {
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return;
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}
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for (int i = 0; i < data->path.size(); i++) {
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if (data->path.size() == 1) {
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break;
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}
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if (data->path[i].operator String() == ".") {
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data->path.remove(i);
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i--;
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} else if (data->path[i].operator String() == ".." && i > 0 && data->path[i - 1].operator String() != "." && data->path[i - 1].operator String() != "..") {
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//remove both
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data->path.remove(i - 1);
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data->path.remove(i - 1);
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i -= 2;
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if (data->path.size() == 0) {
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data->path.push_back(".");
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break;
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}
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}
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}
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data->hash_cache_valid = false;
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}
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NodePath NodePath::simplified() const {
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NodePath np = *this;
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np.simplify();
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return np;
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}
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NodePath::NodePath(const String &p_path) {
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data = nullptr;
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if (p_path.length() == 0) {
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return;
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}
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String path = p_path;
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Vector<StringName> subpath;
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bool absolute = (path[0] == '/');
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bool last_is_slash = true;
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bool has_slashes = false;
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int slices = 0;
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int subpath_pos = path.find(":");
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if (subpath_pos != -1) {
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int from = subpath_pos + 1;
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for (int i = from; i <= path.length(); i++) {
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if (path[i] == ':' || path[i] == 0) {
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String str = path.substr(from, i - from);
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if (str == "") {
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if (path[i] == 0) {
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continue; // Allow end-of-path :
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}
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ERR_FAIL_MSG("Invalid NodePath '" + p_path + "'.");
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}
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subpath.push_back(str);
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from = i + 1;
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}
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}
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path = path.substr(0, subpath_pos);
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}
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for (int i = (int)absolute; i < path.length(); i++) {
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if (path[i] == '/') {
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last_is_slash = true;
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has_slashes = true;
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} else {
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if (last_is_slash) {
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slices++;
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}
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last_is_slash = false;
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}
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}
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if (slices == 0 && !absolute && !subpath.size()) {
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return;
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}
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data = memnew(Data);
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data->refcount.init();
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data->absolute = absolute;
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data->has_slashes = has_slashes;
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data->subpath = subpath;
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data->hash_cache_valid = false;
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if (slices == 0) {
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return;
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}
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data->path.resize(slices);
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last_is_slash = true;
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int from = (int)absolute;
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int slice = 0;
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for (int i = (int)absolute; i < path.length() + 1; i++) {
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if (path[i] == '/' || path[i] == 0) {
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if (!last_is_slash) {
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String name = path.substr(from, i - from);
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ERR_FAIL_INDEX(slice, data->path.size());
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data->path.write[slice++] = name;
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}
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from = i + 1;
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last_is_slash = true;
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} else {
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last_is_slash = false;
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}
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}
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}
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bool NodePath::is_empty() const {
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return !data;
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}
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NodePath::NodePath() {
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data = nullptr;
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}
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NodePath::~NodePath() {
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unref();
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}
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