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virtualx-engine/scene/resources/syntax_highlighter.cpp
Paulb23 fffeecfd68 Improvments for SyntaxHighlighters 
- Fix immedate Funcion in lamba highlight
- Highlight signals as one colour
- Highlight node paths as one colour
- Highlight escape chars in strings
2022-01-15 15:39:55 +00:00

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/*************************************************************************/
/* syntax_highlighter.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "syntax_highlighter.h"
#include "core/object/script_language.h"
#include "scene/gui/text_edit.h"
Dictionary SyntaxHighlighter::get_line_syntax_highlighting(int p_line) {
if (highlighting_cache.has(p_line)) {
return highlighting_cache[p_line];
}
Dictionary color_map;
if (text_edit == nullptr) {
return color_map;
}
if (!GDVIRTUAL_CALL(_get_line_syntax_highlighting, p_line, color_map)) {
color_map = _get_line_syntax_highlighting_impl(p_line);
}
highlighting_cache[p_line] = color_map;
return color_map;
}
void SyntaxHighlighter::_lines_edited_from(int p_from_line, int p_to_line) {
if (highlighting_cache.size() < 1) {
return;
}
int cache_size = highlighting_cache.back()->key();
for (int i = MIN(p_from_line, p_to_line) - 1; i <= cache_size; i++) {
if (highlighting_cache.has(i)) {
highlighting_cache.erase(i);
}
}
}
void SyntaxHighlighter::clear_highlighting_cache() {
highlighting_cache.clear();
if (GDVIRTUAL_CALL(_clear_highlighting_cache)) {
return;
}
_clear_highlighting_cache();
}
void SyntaxHighlighter::update_cache() {
clear_highlighting_cache();
if (text_edit == nullptr) {
return;
}
if (GDVIRTUAL_CALL(_update_cache)) {
return;
}
_update_cache();
}
void SyntaxHighlighter::set_text_edit(TextEdit *p_text_edit) {
if (text_edit && ObjectDB::get_instance(text_edit_instance_id)) {
text_edit->disconnect("lines_edited_from", callable_mp(this, &SyntaxHighlighter::_lines_edited_from));
}
text_edit = p_text_edit;
if (p_text_edit == nullptr) {
return;
}
text_edit_instance_id = text_edit->get_instance_id();
text_edit->connect("lines_edited_from", callable_mp(this, &SyntaxHighlighter::_lines_edited_from));
update_cache();
}
TextEdit *SyntaxHighlighter::get_text_edit() {
return text_edit;
}
void SyntaxHighlighter::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_line_syntax_highlighting", "line"), &SyntaxHighlighter::get_line_syntax_highlighting);
ClassDB::bind_method(D_METHOD("update_cache"), &SyntaxHighlighter::update_cache);
ClassDB::bind_method(D_METHOD("clear_highlighting_cache"), &SyntaxHighlighter::clear_highlighting_cache);
ClassDB::bind_method(D_METHOD("get_text_edit"), &SyntaxHighlighter::get_text_edit);
GDVIRTUAL_BIND(_get_line_syntax_highlighting, "line")
GDVIRTUAL_BIND(_clear_highlighting_cache)
GDVIRTUAL_BIND(_update_cache)
}
////////////////////////////////////////////////////////////////////////////////
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'));
}
Dictionary CodeHighlighter::_get_line_syntax_highlighting_impl(int p_line) {
Dictionary color_map;
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_member_variable = false;
bool is_hex_notation = 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 < line_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;
if (in_region == -1) {
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) {
if (from + end_key_length > line_length && (color_regions[in_region].start_key == "\"" || color_regions[in_region].start_key == "\'")) {
// If it's key length and there is a '\', dont skip to highlight esc chars.
if (str.find("\\", from) >= 0) {
break;
}
}
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) {
bool is_string = (color_regions[in_region].start_key == "\"" || color_regions[in_region].start_key == "\'");
Color region_color = color_regions[in_region].color;
prev_color = region_color;
highlighter_info["color"] = region_color;
color_map[j] = highlighter_info;
/* 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) {
// Don't break if '\' to highlight esc chars.
if (!is_string || str.find("\\", from) < 0) {
break;
}
}
if (!is_symbol(str[from])) {
continue;
}
if (str[from] == '\\') {
if (is_string) {
Dictionary escape_char_highlighter_info;
escape_char_highlighter_info["color"] = symbol_color;
color_map[from] = escape_char_highlighter_info;
}
from++;
if (is_string) {
Dictionary region_continue_highlighter_info;
prev_color = region_color;
region_continue_highlighter_info["color"] = region_color;
color_map[from + 1] = region_continue_highlighter_info;
}
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;
}
}
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;
}
// 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] == '_' || str[j] == 'f' || 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;
}
}
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 < line_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 < line_length && !is_symbol(str[k]) && str[k] != '\t' && str[k] != ' ') {
k++;
}
// Check for space between name and bracket.
while (k < line_length && (str[k] == '\t' || str[k] == ' ')) {
k++;
}
if (str[k] == '(') {
in_function_name = 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) {
in_function_name = false;
in_member_variable = false;
}
if (in_keyword) {
color = keyword_color;
} else if (in_member_variable) {
color = member_color;
} else if (in_function_name) {
color = function_color;
} else if (is_a_symbol) {
color = symbol_color;
} else if (is_number) {
color = number_color;
}
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;
}
void CodeHighlighter::_clear_highlighting_cache() {
color_region_cache.clear();
}
void CodeHighlighter::_update_cache() {
font_color = text_edit->get_theme_color(SNAME("font_color"));
}
void CodeHighlighter::add_keyword_color(const String &p_keyword, const Color &p_color) {
keywords[p_keyword] = p_color;
clear_highlighting_cache();
}
void CodeHighlighter::remove_keyword_color(const String &p_keyword) {
keywords.erase(p_keyword);
clear_highlighting_cache();
}
bool CodeHighlighter::has_keyword_color(const String &p_keyword) const {
return keywords.has(p_keyword);
}
Color CodeHighlighter::get_keyword_color(const String &p_keyword) const {
ERR_FAIL_COND_V(!keywords.has(p_keyword), Color());
return keywords[p_keyword];
}
void CodeHighlighter::set_keyword_colors(const Dictionary p_keywords) {
keywords.clear();
keywords = p_keywords;
clear_highlighting_cache();
}
void CodeHighlighter::clear_keyword_colors() {
keywords.clear();
clear_highlighting_cache();
}
Dictionary CodeHighlighter::get_keyword_colors() const {
return keywords;
}
void CodeHighlighter::add_member_keyword_color(const String &p_member_keyword, const Color &p_color) {
member_keywords[p_member_keyword] = p_color;
clear_highlighting_cache();
}
void CodeHighlighter::remove_member_keyword_color(const String &p_member_keyword) {
member_keywords.erase(p_member_keyword);
clear_highlighting_cache();
}
bool CodeHighlighter::has_member_keyword_color(const String &p_member_keyword) const {
return member_keywords.has(p_member_keyword);
}
Color CodeHighlighter::get_member_keyword_color(const String &p_member_keyword) const {
ERR_FAIL_COND_V(!member_keywords.has(p_member_keyword), Color());
return member_keywords[p_member_keyword];
}
void CodeHighlighter::set_member_keyword_colors(const Dictionary &p_member_keywords) {
member_keywords.clear();
member_keywords = p_member_keywords;
clear_highlighting_cache();
}
void CodeHighlighter::clear_member_keyword_colors() {
member_keywords.clear();
clear_highlighting_cache();
}
Dictionary CodeHighlighter::get_member_keyword_colors() const {
return member_keywords;
}
void CodeHighlighter::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 || p_end_key.is_empty();
color_regions.insert(at, color_region);
clear_highlighting_cache();
}
void CodeHighlighter::remove_color_region(const String &p_start_key) {
for (int i = 0; i < color_regions.size(); i++) {
if (color_regions[i].start_key == p_start_key) {
color_regions.remove_at(i);
break;
}
}
clear_highlighting_cache();
}
bool CodeHighlighter::has_color_region(const String &p_start_key) const {
for (int i = 0; i < color_regions.size(); i++) {
if (color_regions[i].start_key == p_start_key) {
return true;
}
}
return false;
}
void CodeHighlighter::set_color_regions(const Dictionary &p_color_regions) {
color_regions.clear();
List<Variant> keys;
p_color_regions.get_key_list(&keys);
for (const Variant &E : keys) {
String key = E;
String start_key = key.get_slice(" ", 0);
String end_key = key.get_slice_count(" ") > 1 ? key.get_slice(" ", 1) : String();
add_color_region(start_key, end_key, p_color_regions[key], end_key.is_empty());
}
clear_highlighting_cache();
}
void CodeHighlighter::clear_color_regions() {
color_regions.clear();
clear_highlighting_cache();
}
Dictionary CodeHighlighter::get_color_regions() const {
Dictionary r_color_regions;
for (int i = 0; i < color_regions.size(); i++) {
ColorRegion region = color_regions[i];
r_color_regions[region.start_key + (region.end_key.is_empty() ? "" : " " + region.end_key)] = region.color;
}
return r_color_regions;
}
void CodeHighlighter::_bind_methods() {
ClassDB::bind_method(D_METHOD("add_keyword_color", "keyword", "color"), &CodeHighlighter::add_keyword_color);
ClassDB::bind_method(D_METHOD("remove_keyword_color", "keyword"), &CodeHighlighter::remove_keyword_color);
ClassDB::bind_method(D_METHOD("has_keyword_color", "keyword"), &CodeHighlighter::has_keyword_color);
ClassDB::bind_method(D_METHOD("get_keyword_color", "keyword"), &CodeHighlighter::get_keyword_color);
ClassDB::bind_method(D_METHOD("set_keyword_colors", "keywords"), &CodeHighlighter::set_keyword_colors);
ClassDB::bind_method(D_METHOD("clear_keyword_colors"), &CodeHighlighter::clear_keyword_colors);
ClassDB::bind_method(D_METHOD("get_keyword_colors"), &CodeHighlighter::get_keyword_colors);
ClassDB::bind_method(D_METHOD("add_member_keyword_color", "member_keyword", "color"), &CodeHighlighter::add_member_keyword_color);
ClassDB::bind_method(D_METHOD("remove_member_keyword_color", "member_keyword"), &CodeHighlighter::remove_member_keyword_color);
ClassDB::bind_method(D_METHOD("has_member_keyword_color", "member_keyword"), &CodeHighlighter::has_member_keyword_color);
ClassDB::bind_method(D_METHOD("get_member_keyword_color", "member_keyword"), &CodeHighlighter::get_member_keyword_color);
ClassDB::bind_method(D_METHOD("set_member_keyword_colors", "member_keyword"), &CodeHighlighter::set_member_keyword_colors);
ClassDB::bind_method(D_METHOD("clear_member_keyword_colors"), &CodeHighlighter::clear_member_keyword_colors);
ClassDB::bind_method(D_METHOD("get_member_keyword_colors"), &CodeHighlighter::get_member_keyword_colors);
ClassDB::bind_method(D_METHOD("add_color_region", "start_key", "end_key", "color", "line_only"), &CodeHighlighter::add_color_region, DEFVAL(false));
ClassDB::bind_method(D_METHOD("remove_color_region", "start_key"), &CodeHighlighter::remove_color_region);
ClassDB::bind_method(D_METHOD("has_color_region", "start_key"), &CodeHighlighter::has_color_region);
ClassDB::bind_method(D_METHOD("set_color_regions", "color_regions"), &CodeHighlighter::set_color_regions);
ClassDB::bind_method(D_METHOD("clear_color_regions"), &CodeHighlighter::clear_color_regions);
ClassDB::bind_method(D_METHOD("get_color_regions"), &CodeHighlighter::get_color_regions);
ClassDB::bind_method(D_METHOD("set_function_color", "color"), &CodeHighlighter::set_function_color);
ClassDB::bind_method(D_METHOD("get_function_color"), &CodeHighlighter::get_function_color);
ClassDB::bind_method(D_METHOD("set_number_color", "color"), &CodeHighlighter::set_number_color);
ClassDB::bind_method(D_METHOD("get_number_color"), &CodeHighlighter::get_number_color);
ClassDB::bind_method(D_METHOD("set_symbol_color", "color"), &CodeHighlighter::set_symbol_color);
ClassDB::bind_method(D_METHOD("get_symbol_color"), &CodeHighlighter::get_symbol_color);
ClassDB::bind_method(D_METHOD("set_member_variable_color", "color"), &CodeHighlighter::set_member_variable_color);
ClassDB::bind_method(D_METHOD("get_member_variable_color"), &CodeHighlighter::get_member_variable_color);
ADD_PROPERTY(PropertyInfo(Variant::COLOR, "number_color"), "set_number_color", "get_number_color");
ADD_PROPERTY(PropertyInfo(Variant::COLOR, "symbol_color"), "set_symbol_color", "get_symbol_color");
ADD_PROPERTY(PropertyInfo(Variant::COLOR, "function_color"), "set_function_color", "get_function_color");
ADD_PROPERTY(PropertyInfo(Variant::COLOR, "member_variable_color"), "set_member_variable_color", "get_member_variable_color");
ADD_PROPERTY(PropertyInfo(Variant::DICTIONARY, "keyword_colors"), "set_keyword_colors", "get_keyword_colors");
ADD_PROPERTY(PropertyInfo(Variant::DICTIONARY, "member_keyword_colors"), "set_member_keyword_colors", "get_member_keyword_colors");
ADD_PROPERTY(PropertyInfo(Variant::DICTIONARY, "color_regions"), "set_color_regions", "get_color_regions");
}
void CodeHighlighter::set_number_color(Color p_color) {
number_color = p_color;
clear_highlighting_cache();
}
Color CodeHighlighter::get_number_color() const {
return number_color;
}
void CodeHighlighter::set_symbol_color(Color p_color) {
symbol_color = p_color;
clear_highlighting_cache();
}
Color CodeHighlighter::get_symbol_color() const {
return symbol_color;
}
void CodeHighlighter::set_function_color(Color p_color) {
function_color = p_color;
clear_highlighting_cache();
}
Color CodeHighlighter::get_function_color() const {
return function_color;
}
void CodeHighlighter::set_member_variable_color(Color p_color) {
member_color = p_color;
clear_highlighting_cache();
}
Color CodeHighlighter::get_member_variable_color() const {
return member_color;
}
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