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godot/modules/gdscript/editor/gdscript_highlighter.cpp
Rémi Verschelde b5334d14f7
Update copyright statements to 2021 
Happy new year to the wonderful Godot community!

2020 has been a tough year for most of us personally, but a good year for
Godot development nonetheless with a huge amount of work done towards Godot
4.0 and great improvements backported to the long-lived 3.2 branch.

We've had close to 400 contributors to engine code this year, authoring near
7,000 commit! (And that's only for the `master` branch and for the engine code,
there's a lot more when counting docs, demos and other first-party repos.)

Here's to a great year 2021 for all Godot users 🎆
2021-01-01 20:19:21 +01:00

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/*************************************************************************/
/* gdscript_highlighter.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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 "gdscript_highlighter.h"
#include "../gdscript.h"
#include "../gdscript_tokenizer.h"
#include "editor/editor_settings.h"
static bool _is_char(char32_t c) {
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_';
}
static bool _is_hex_symbol(char32_t c) {
return ((c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'));
}
static bool _is_bin_symbol(char32_t c) {
return (c == '0' || c == '1');
}
Dictionary GDScriptSyntaxHighlighter::_get_line_syntax_highlighting(int p_line) {
Dictionary color_map;
Type next_type = NONE;
Type current_type = NONE;
Type previous_type = NONE;
String previous_text = "";
int previous_column = 0;
bool prev_is_char = false;
bool prev_is_number = false;
bool in_keyword = false;
bool in_word = false;
bool in_function_name = false;
bool in_variable_declaration = false;
bool in_function_args = false;
bool in_member_variable = false;
bool in_node_path = false;
bool is_hex_notation = false;
bool is_bin_notation = false;
bool expect_type = false;
Color keyword_color;
Color color;
color_region_cache[p_line] = -1;
int in_region = -1;
if (p_line != 0) {
int prev_region_line = p_line - 1;
while (prev_region_line > 0 && !color_region_cache.has(prev_region_line)) {
prev_region_line--;
}
for (int i = prev_region_line; i < p_line - 1; i++) {
get_line_syntax_highlighting(i);
}
if (!color_region_cache.has(p_line - 1)) {
get_line_syntax_highlighting(p_line - 1);
}
in_region = color_region_cache[p_line - 1];
}
const String &str = text_edit->get_line(p_line);
const int line_length = str.length();
Color prev_color;
if (in_region != -1 && str.length() == 0) {
color_region_cache[p_line] = in_region;
}
for (int j = 0; j < str.length(); j++) {
Dictionary highlighter_info;
color = font_color;
bool is_char = !is_symbol(str[j]);
bool is_a_symbol = is_symbol(str[j]);
bool is_number = (str[j] >= '0' && str[j] <= '9');
/* color regions */
if (is_a_symbol || in_region != -1) {
int from = j;
for (; from < line_length; from++) {
if (str[from] == '\\') {
from++;
continue;
}
break;
}
if (from != line_length) {
/* check if we are in entering a region */
if (in_region == -1) {
for (int c = 0; c < color_regions.size(); c++) {
/* check there is enough room */
int chars_left = line_length - from;
int start_key_length = color_regions[c].start_key.length();
int end_key_length = color_regions[c].end_key.length();
if (chars_left < start_key_length) {
continue;
}
/* search the line */
bool match = true;
const char32_t *start_key = color_regions[c].start_key.get_data();
for (int k = 0; k < start_key_length; k++) {
if (start_key[k] != str[from + k]) {
match = false;
break;
}
}
if (!match) {
continue;
}
in_region = c;
from += start_key_length;
/* check if it's the whole line */
if (end_key_length == 0 || color_regions[c].line_only || from + end_key_length > line_length) {
prev_color = color_regions[in_region].color;
highlighter_info["color"] = color_regions[c].color;
color_map[j] = highlighter_info;
j = line_length;
if (!color_regions[c].line_only) {
color_region_cache[p_line] = c;
}
}
break;
}
if (j == line_length) {
continue;
}
}
/* if we are in one find the end key */
if (in_region != -1) {
/* search the line */
int region_end_index = -1;
int end_key_length = color_regions[in_region].end_key.length();
const char32_t *end_key = color_regions[in_region].end_key.get_data();
for (; from < line_length; from++) {
if (line_length - from < end_key_length) {
break;
}
if (!is_symbol(str[from])) {
continue;
}
if (str[from] == '\\') {
from++;
continue;
}
region_end_index = from;
for (int k = 0; k < end_key_length; k++) {
if (end_key[k] != str[from + k]) {
region_end_index = -1;
break;
}
}
if (region_end_index != -1) {
break;
}
}
prev_color = color_regions[in_region].color;
highlighter_info["color"] = color_regions[in_region].color;
color_map[j] = highlighter_info;
previous_type = REGION;
previous_text = "";
previous_column = j;
j = from + (end_key_length - 1);
if (region_end_index == -1) {
color_region_cache[p_line] = in_region;
}
in_region = -1;
prev_is_char = false;
prev_is_number = false;
continue;
}
}
}
// allow ABCDEF in hex notation
if (is_hex_notation && (_is_hex_symbol(str[j]) || is_number)) {
is_number = true;
} else {
is_hex_notation = false;
}
// disallow anything not a 0 or 1
if (is_bin_notation && (_is_bin_symbol(str[j]))) {
is_number = true;
} else if (is_bin_notation) {
is_bin_notation = false;
is_number = false;
} else {
is_bin_notation = false;
}
// check for dot or underscore or 'x' for hex notation in floating point number or 'e' for scientific notation
if ((str[j] == '.' || str[j] == 'x' || str[j] == 'b' || str[j] == '_' || str[j] == 'e') && !in_word && prev_is_number && !is_number) {
is_number = true;
is_a_symbol = false;
is_char = false;
if (str[j] == 'x' && str[j - 1] == '0') {
is_hex_notation = true;
} else if (str[j] == 'b' && str[j - 1] == '0') {
is_bin_notation = true;
}
}
if (!in_word && _is_char(str[j]) && !is_number) {
in_word = true;
}
if ((in_keyword || in_word) && !is_hex_notation) {
is_number = false;
}
if (is_a_symbol && str[j] != '.' && in_word) {
in_word = false;
}
if (!is_char) {
in_keyword = false;
}
if (!in_keyword && is_char && !prev_is_char) {
int to = j;
while (to < str.length() && !is_symbol(str[to])) {
to++;
}
String word = str.substr(j, to - j);
Color col = Color();
if (keywords.has(word)) {
col = keywords[word];
} else if (member_keywords.has(word)) {
col = member_keywords[word];
for (int k = j - 1; k >= 0; k--) {
if (str[k] == '.') {
col = Color(); //member indexing not allowed
break;
} else if (str[k] > 32) {
break;
}
}
}
if (col != Color()) {
in_keyword = true;
keyword_color = col;
}
}
if (!in_function_name && in_word && !in_keyword) {
int k = j;
while (k < str.length() && !is_symbol(str[k]) && str[k] != '\t' && str[k] != ' ') {
k++;
}
// check for space between name and bracket
while (k < str.length() && (str[k] == '\t' || str[k] == ' ')) {
k++;
}
if (str[k] == '(') {
in_function_name = true;
} else if (previous_text == GDScriptTokenizer::get_token_name(GDScriptTokenizer::Token::VAR)) {
in_variable_declaration = true;
}
}
if (!in_function_name && !in_member_variable && !in_keyword && !is_number && in_word) {
int k = j;
while (k > 0 && !is_symbol(str[k]) && str[k] != '\t' && str[k] != ' ') {
k--;
}
if (str[k] == '.') {
in_member_variable = true;
}
}
if (is_a_symbol) {
if (in_function_name) {
in_function_args = true;
}
if (in_function_args && str[j] == ')') {
in_function_args = false;
}
if (expect_type && (prev_is_char || str[j] == '=')) {
expect_type = false;
}
if (j > 0 && str[j] == '>' && str[j - 1] == '-') {
expect_type = true;
}
if (in_variable_declaration || in_function_args) {
int k = j;
// Skip space
while (k < str.length() && (str[k] == '\t' || str[k] == ' ')) {
k++;
}
if (str[k] == ':') {
// has type hint
expect_type = true;
}
}
in_variable_declaration = false;
in_function_name = false;
in_member_variable = false;
}
if (!in_node_path && in_region == -1 && str[j] == '$') {
in_node_path = true;
} else if (in_region != -1 || (is_a_symbol && str[j] != '/')) {
in_node_path = false;
}
if (in_node_path) {
next_type = NODE_PATH;
color = node_path_color;
} else if (in_keyword) {
next_type = KEYWORD;
color = keyword_color;
} else if (in_member_variable) {
next_type = MEMBER;
color = member_color;
} else if (in_function_name) {
next_type = FUNCTION;
if (previous_text == GDScriptTokenizer::get_token_name(GDScriptTokenizer::Token::FUNC)) {
color = function_definition_color;
} else {
color = function_color;
}
} else if (is_a_symbol) {
next_type = SYMBOL;
color = symbol_color;
} else if (is_number) {
next_type = NUMBER;
color = number_color;
} else if (expect_type) {
next_type = TYPE;
color = type_color;
} else {
next_type = IDENTIFIER;
}
if (next_type != current_type) {
if (current_type == NONE) {
current_type = next_type;
} else {
previous_type = current_type;
current_type = next_type;
// no need to store regions...
if (previous_type == REGION) {
previous_text = "";
previous_column = j;
} else {
String text = str.substr(previous_column, j - previous_column).strip_edges();
previous_column = j;
// ignore if just whitespace
if (text != "") {
previous_text = text;
}
}
}
}
prev_is_char = is_char;
prev_is_number = is_number;
if (color != prev_color) {
prev_color = color;
highlighter_info["color"] = color;
color_map[j] = highlighter_info;
}
}
return color_map;
}
String GDScriptSyntaxHighlighter::_get_name() const {
return "GDScript";
}
Array GDScriptSyntaxHighlighter::_get_supported_languages() const {
Array languages;
languages.push_back("GDScript");
return languages;
}
void GDScriptSyntaxHighlighter::_update_cache() {
keywords.clear();
member_keywords.clear();
color_regions.clear();
color_region_cache.clear();
font_color = text_edit->get_theme_color("font_color");
symbol_color = EDITOR_GET("text_editor/highlighting/symbol_color");
function_color = EDITOR_GET("text_editor/highlighting/function_color");
number_color = EDITOR_GET("text_editor/highlighting/number_color");
member_color = EDITOR_GET("text_editor/highlighting/member_variable_color");
/* Engine types. */
const Color types_color = EDITOR_GET("text_editor/highlighting/engine_type_color");
List<StringName> types;
ClassDB::get_class_list(&types);
for (List<StringName>::Element *E = types.front(); E; E = E->next()) {
String n = E->get();
if (n.begins_with("_")) {
n = n.substr(1, n.length());
}
keywords[n] = types_color;
}
/* User types. */
const Color usertype_color = EDITOR_GET("text_editor/highlighting/user_type_color");
List<StringName> global_classes;
ScriptServer::get_global_class_list(&global_classes);
for (List<StringName>::Element *E = global_classes.front(); E; E = E->next()) {
keywords[String(E->get())] = usertype_color;
}
/* Autoloads. */
Map<StringName, ProjectSettings::AutoloadInfo> autoloads = ProjectSettings::get_singleton()->get_autoload_list();
for (Map<StringName, ProjectSettings::AutoloadInfo>::Element *E = autoloads.front(); E; E = E->next()) {
const ProjectSettings::AutoloadInfo &info = E->value();
if (info.is_singleton) {
keywords[info.name] = usertype_color;
}
}
const GDScriptLanguage *gdscript = GDScriptLanguage::get_singleton();
/* Core types. */
const Color basetype_color = EDITOR_GET("text_editor/highlighting/base_type_color");
List<String> core_types;
gdscript->get_core_type_words(&core_types);
for (List<String>::Element *E = core_types.front(); E; E = E->next()) {
keywords[E->get()] = basetype_color;
}
/* Reserved words. */
const Color keyword_color = EDITOR_GET("text_editor/highlighting/keyword_color");
List<String> keyword_list;
gdscript->get_reserved_words(&keyword_list);
for (List<String>::Element *E = keyword_list.front(); E; E = E->next()) {
keywords[E->get()] = keyword_color;
}
/* Comments */
const Color comment_color = EDITOR_GET("text_editor/highlighting/comment_color");
List<String> comments;
gdscript->get_comment_delimiters(&comments);
for (List<String>::Element *E = comments.front(); E; E = E->next()) {
String comment = E->get();
String beg = comment.get_slice(" ", 0);
String end = comment.get_slice_count(" ") > 1 ? comment.get_slice(" ", 1) : String();
add_color_region(beg, end, comment_color, end == "");
}
/* Strings */
const Color string_color = EDITOR_GET("text_editor/highlighting/string_color");
List<String> strings;
gdscript->get_string_delimiters(&strings);
for (List<String>::Element *E = strings.front(); E; E = E->next()) {
String string = E->get();
String beg = string.get_slice(" ", 0);
String end = string.get_slice_count(" ") > 1 ? string.get_slice(" ", 1) : String();
add_color_region(beg, end, string_color, end == "");
}
const Ref<Script> script = _get_edited_resource();
if (script.is_valid()) {
/* Member types. */
const Color member_variable_color = EDITOR_GET("text_editor/highlighting/member_variable_color");
StringName instance_base = script->get_instance_base_type();
if (instance_base != StringName()) {
List<PropertyInfo> plist;
ClassDB::get_property_list(instance_base, &plist);
for (List<PropertyInfo>::Element *E = plist.front(); E; E = E->next()) {
String name = E->get().name;
if (E->get().usage & PROPERTY_USAGE_CATEGORY || E->get().usage & PROPERTY_USAGE_GROUP || E->get().usage & PROPERTY_USAGE_SUBGROUP) {
continue;
}
if (name.find("/") != -1) {
continue;
}
member_keywords[name] = member_variable_color;
}
List<String> clist;
ClassDB::get_integer_constant_list(instance_base, &clist);
for (List<String>::Element *E = clist.front(); E; E = E->next()) {
member_keywords[E->get()] = member_variable_color;
}
}
}
const String text_edit_color_theme = EditorSettings::get_singleton()->get("text_editor/theme/color_theme");
const bool default_theme = text_edit_color_theme == "Default";
if (default_theme || EditorSettings::get_singleton()->is_dark_theme()) {
function_definition_color = Color(0.4, 0.9, 1.0);
node_path_color = Color(0.39, 0.76, 0.35);
} else {
function_definition_color = Color(0.0, 0.65, 0.73);
node_path_color = Color(0.32, 0.55, 0.29);
}
EDITOR_DEF("text_editor/highlighting/gdscript/function_definition_color", function_definition_color);
EDITOR_DEF("text_editor/highlighting/gdscript/node_path_color", node_path_color);
if (text_edit_color_theme == "Adaptive" || default_theme) {
EditorSettings::get_singleton()->set_initial_value(
"text_editor/highlighting/gdscript/function_definition_color",
function_definition_color,
true);
EditorSettings::get_singleton()->set_initial_value(
"text_editor/highlighting/gdscript/node_path_color",
node_path_color,
true);
}
function_definition_color = EDITOR_GET("text_editor/highlighting/gdscript/function_definition_color");
node_path_color = EDITOR_GET("text_editor/highlighting/gdscript/node_path_color");
type_color = EDITOR_GET("text_editor/highlighting/base_type_color");
}
void GDScriptSyntaxHighlighter::add_color_region(const String &p_start_key, const String &p_end_key, const Color &p_color, bool p_line_only) {
for (int i = 0; i < p_start_key.length(); i++) {
ERR_FAIL_COND_MSG(!is_symbol(p_start_key[i]), "color regions must start with a symbol");
}
if (p_end_key.length() > 0) {
for (int i = 0; i < p_end_key.length(); i++) {
ERR_FAIL_COND_MSG(!is_symbol(p_end_key[i]), "color regions must end with a symbol");
}
}
int at = 0;
for (int i = 0; i < color_regions.size(); i++) {
ERR_FAIL_COND_MSG(color_regions[i].start_key == p_start_key, "color region with start key '" + p_start_key + "' already exists.");
if (p_start_key.length() < color_regions[i].start_key.length()) {
at++;
}
}
ColorRegion color_region;
color_region.color = p_color;
color_region.start_key = p_start_key;
color_region.end_key = p_end_key;
color_region.line_only = p_line_only;
color_regions.insert(at, color_region);
clear_highlighting_cache();
}
Ref<EditorSyntaxHighlighter> GDScriptSyntaxHighlighter::_create() const {
Ref<GDScriptSyntaxHighlighter> syntax_highlighter;
syntax_highlighter.instance();
return syntax_highlighter;
}
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