efforting.tech/nodejs.esm-library
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Implemented basic-tree

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This commit is contained in:
Mikael Lövqvist
2026-04-12 01:30:37 +02:00
parent a02e0f5800
commit 81035737a2
4 changed files with 117 additions and 106 deletions
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98
experiments/text-nodes.mjs
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@@ -1,47 +1,9 @@
import * as CF from '@efforting.tech/data/field-configuration-factories';
import { readFileSync } from 'node:fs';
import { inspect } from 'node:util';
import { Indention_Mode, Text_Settings } from '@efforting.tech/text/basic-tree';
// TODO: Move into string helper module
function string_has_contents(str) {
return /\S/.test(str);
}
function *indented_line_iterator(settings, text) {
let line_no = settings.first_line;
let index = 0;
const { indention_tabulator_width } = settings;
switch (settings.indention_mode) {
case Indention_Mode.symbols.TABULATORS: {
for (const line of text.matchAll(/^(\t*)(.*)$/gm)) {
const [raw, tabs, remaining] = line;
yield { raw, indent: tabs.length, line: remaining, line_no: line_no++, index: index++};
}
break;
}
case Indention_Mode.symbols.SPACES: {
for (const line of text.matchAll(/^([ ]*)(.*)$/gm)) {
const [raw, spaces, remaining] = line;
if ((spaces.length % indention_tabulator_width) !== 0) {
throw new Error('Unaligned indention'); //TODO - proper error
}
yield { raw, indent: Math.floor(spaces.length / indention_tabulator_width), line: remaining, line_no: line_no++, index: index++};
}
break;
}
default:
throw new Error('Unsupported indention mode'); //TODO - proper error
}
}
import { Indention_Mode, Text_Settings, string_has_contents, indented_line_iterator } from '@efforting.tech/data/string-utilities';
import { Text_Node } from '@efforting.tech/text/basic-tree';
const ts = Text_Settings.load({
@@ -68,61 +30,9 @@ branch3
`;
class Text_Node {
constructor(text_settings, line=undefined, indent=0, line_no=undefined, index=undefined, raw=undefined, parent=undefined) {
Object.assign(this, { text_settings, line, indent, line_no, index, raw, parent, children: [] });
}
}
const root = Text_Node.from_string(ts, example_string);
const root = new Text_Node(ts);
// NOTE: This first Text_Node is not added to the tree, it serves as an initial cursor only.
let current = new Text_Node(root.text_settings, undefined, 0, undefined, undefined, undefined, root);
for (const line_info of indented_line_iterator(ts, example_string)) {
// TODO: Implement other variants than inherit-from-previous
const indent = string_has_contents(line_info.line) ? line_info.indent : current.indent;
const delta_indent = indent - current.indent;
if (delta_indent == 0) {
const pending = new Text_Node(current.text_settings, undefined, current.indent, undefined, undefined, undefined, current.parent); // Partial insertion - same level
if (current.parent) {
current.parent.children.push(pending);
}
current = pending;
} else if (delta_indent > 0) {
for (let i=0; i<delta_indent; i++) {
const pending = new Text_Node(current.text_settings, undefined, current.indent + 1, undefined, undefined, undefined, current); // Partial insertion
current.children.push(pending);
current = pending;
}
} else {
for (let i=0; i>delta_indent; i--) {
current = current.parent;
}
const pending = new Text_Node(current.text_settings, undefined, current.indent, undefined, undefined, undefined, current.parent); // Partial insertion - same level
if (current.parent) {
current.parent.children.push(pending);
}
current = pending;
}
// Fill in partial insertion
Object.assign(current, {
line: line_info.line,
line_no: line_info.line_no,
index: line_info.index,
raw: line_info.raw,
});
}
function debug_dump(node, level=0) {
console.log(`${" ".repeat(level)}[${node.line_no ?? '-'}] ${inspect(node.line)}`);
@@ -132,6 +42,8 @@ function debug_dump(node, level=0) {
}
debug_dump(root);
/*
[-] undefined