ZDDC/browse/js/yaml-complete.js
ZDDC a13ce12a75 feat(browse): shared schema completion + hover docs; bring it to the .zddc editor
Generalise the front-matter completion into a reusable, provider-based helper
(browse/js/yaml-complete.js) and wire BOTH YAML editors through it. Still fully
deterministic — every candidate and doc string comes from a schema, no AI.

- yaml-complete.js: shared CodeMirror plumbing (indent→key-path, sibling scan,
  show-hint, debounced hover tooltip) + two providers:
    · flatProvider  — a fixed field list (front matter), with an exclude set.
    · schemaProvider — a JSON Schema walker that resolves nested key-paths
      through properties / additionalProperties / patternProperties and the
      recursive $ref:"#" .zddc uses for paths:; keys from object properties,
      values from enum / boolean, hover docs from `description`.
- .zddc editor (preview-yaml.js): fetch /.api/zddc-schema once and attach the
  schemaProvider on .zddc files — nested-key completion at every level, enum
  values (default_tool, dir_tool, views.*.tool), booleans, and hover docs.
  Plain .yaml stays lint+highlight only.
- Front-matter editor (preview-markdown.js): refactored to delegate to the
  shared helper via flatProvider (excluding the filename-driven identity keys);
  the bespoke frontMatterHints is gone — one implementation now.
- Hover-doc tooltip styling.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-08 09:18:07 -05:00

275 lines
12 KiB
JavaScript

// yaml-complete.js — deterministic, schema-driven completion + hover docs for
// the browse YAML editors (markdown front matter + .zddc). NO heuristics, no
// AI: every candidate and doc string comes from a PROVIDER backed by the
// converter's field list or the .zddc JSON Schema.
//
// A provider answers three questions about a position, identified by its key
// PATH (the array of parent keys):
// keysAt(path) → [{name, hint, values}] valid child keys here
// valuesFor(path, key) → [string] | null enum/boolean values
// describe(path, key) → string | null doc text (for hover)
// The CodeMirror plumbing (indent→path, sibling scan, show-hint, hover) is
// shared; only the provider differs between the flat front matter and the
// nested .zddc schema. Requires CodeMirror 5 + the show-hint add-on.
(function () {
'use strict';
if (!window.app) window.app = {};
if (!window.app.modules) window.app.modules = {};
function indentOf(line) { var m = line.match(/^(\s*)/); return m ? m[1].length : 0; }
function isBlankOrComment(line) { return /^\s*$/.test(line) || /^\s*#/.test(line); }
function truncate(s, n) { s = String(s); return s.length > n ? s.slice(0, n - 1) + '…' : s; }
// Parent key-path for a line, derived from YAML indentation: walk upward
// collecting each "key:" line at a strictly smaller indent.
function pathAt(cm, lineNo) {
var path = [];
var target = indentOf(cm.getLine(lineNo));
for (var ln = lineNo - 1; ln >= 0 && target > 0; ln--) {
var line = cm.getLine(ln);
if (isBlankOrComment(line)) continue;
var ind = indentOf(line);
if (ind < target) {
var m = line.match(/^\s*([\w.\-]+)\s*:/);
if (m) { path.unshift(m[1]); target = ind; }
}
}
return path;
}
// Sibling keys already present at the same indent within this block, so we
// don't re-suggest a key the author already wrote.
function presentSiblings(cm, lineNo, indent) {
var present = {};
[-1, 1].forEach(function (dir) {
for (var ln = lineNo + dir; ln >= 0 && ln < cm.lineCount(); ln += dir) {
var line = cm.getLine(ln);
if (isBlankOrComment(line)) continue;
var ind = indentOf(line);
if (ind < indent) break; // left the block
if (ind === indent) {
var m = line.match(/^\s*([\w.\-]+)\s*:/);
if (m) present[m[1]] = true;
}
}
});
return present;
}
function keyItem(k, hinter) {
var item = {
text: k.name + ': ',
displayText: k.name + (k.hint ? ' — ' + truncate(k.hint, 64) : '')
};
// An enum key inserts "key: " then immediately opens its value menu.
if (k.values && k.values.length) {
item.hint = function (cmi, data, comp) {
cmi.replaceRange(comp.text, data.from, data.to);
setTimeout(function () { cmi.showHint({ hint: hinter, completeSingle: false }); }, 0);
};
}
return item;
}
function makeHinter(provider) {
function hinter(cm) {
var CM = window.CodeMirror;
if (!CM) return null;
var cur = cm.getCursor();
var before = cm.getLine(cur.line).slice(0, cur.ch);
var colon = before.indexOf(':');
var path = pathAt(cm, cur.line);
if (colon === -1) {
// KEY context.
var m = before.match(/^(\s*)([\w.\-]*)$/);
if (!m) return null;
var indent = m[1], typed = m[2];
var keys = provider.keysAt(path) || [];
if (!keys.length) return null;
var present = presentSiblings(cm, cur.line, indent.length);
var list = [];
keys.forEach(function (k) {
if (present[k.name]) return;
if (typed && k.name.indexOf(typed) !== 0) return;
list.push(keyItem(k, hinter));
});
if (!list.length) return null;
return { list: list, from: CM.Pos(cur.line, indent.length), to: cur };
}
// VALUE context.
var key = before.slice(0, colon).trim();
var values = provider.valuesFor(path, key) || [];
if (!values.length) return null;
var rest = before.slice(colon + 1);
var valTyped = rest.replace(/^\s*/, '');
var valStart = colon + 1 + (rest.length - valTyped.length);
var vlist = [];
values.forEach(function (v) {
if (valTyped && v.indexOf(valTyped) !== 0) return;
vlist.push({ text: v, displayText: v });
});
if (!vlist.length) return null;
return { list: vlist, from: CM.Pos(cur.line, valStart), to: cur };
}
return hinter;
}
// Lightweight hover docs: hover a "key:" → its schema description. No
// add-on — a debounced mousemove over the editor + a fixed-position tip.
function attachHover(cm, provider) {
var tip = null, timer = null;
function hide() { if (tip && tip.parentNode) tip.parentNode.removeChild(tip); tip = null; }
function show(text, x, y) {
hide();
tip = document.createElement('div');
tip.className = 'cm-doc-tip';
tip.textContent = text;
document.body.appendChild(tip);
tip.style.left = x + 'px';
tip.style.top = (y + 16) + 'px';
}
var wrap = cm.getWrapperElement();
wrap.addEventListener('mousemove', function (e) {
if (timer) clearTimeout(timer);
var ex = e.clientX, ey = e.clientY;
timer = setTimeout(function () {
if (!wrap.isConnected) { hide(); return; }
try {
var pos = cm.coordsChar({ left: ex, top: ey }, 'window');
var line = cm.getLine(pos.line) || '';
var m = line.match(/^\s*([\w.\-]+)\s*:/);
if (!m) { hide(); return; }
var keyStart = line.indexOf(m[1]);
if (pos.ch < keyStart || pos.ch > keyStart + m[1].length) { hide(); return; }
var doc = provider.describe(pathAt(cm, pos.line), m[1]);
if (doc) show(doc, ex, ey); else hide();
} catch (_e) { hide(); }
}, 350);
});
wrap.addEventListener('mouseleave', function () { if (timer) clearTimeout(timer); hide(); });
cm.on('cursorActivity', hide);
cm.on('changes', hide);
}
// Wire completion (Ctrl-Space + auto-trigger as you type) and hover docs
// onto a CodeMirror instance. opts.readOnly skips the typing trigger;
// opts.hover:false skips hover.
function attach(cm, provider, opts) {
opts = opts || {};
var hinter = makeHinter(provider);
var keys = Object.assign({}, cm.getOption('extraKeys') || {}, {
'Ctrl-Space': function (c) { c.showHint({ hint: hinter, completeSingle: false }); }
});
cm.setOption('extraKeys', keys);
if (!opts.readOnly) {
cm.on('inputRead', function (c, change) {
if (!change.text || change.text.length !== 1) return; // skip paste/delete
if (!/[\w.\-]/.test(change.text[0])) return;
c.showHint({ hint: hinter, completeSingle: false });
});
}
if (opts.hover !== false) attachHover(cm, provider);
return hinter;
}
// ── Providers ───────────────────────────────────────────────────────────
// Flat: a fixed field list [{name, hint, values}] at the root, nothing
// nested (front matter). opts.exclude = names never suggested.
function flatProvider(getFields, opts) {
opts = opts || {};
var exclude = {};
(opts.exclude || []).forEach(function (n) { exclude[n] = true; });
function fields() { return getFields() || []; }
function find(name) {
var fs = fields();
for (var i = 0; i < fs.length; i++) if (fs[i].name === name) return fs[i];
return null;
}
return {
keysAt: function (path) {
if (path.length) return [];
return fields().filter(function (f) { return !exclude[f.name]; })
.map(function (f) { return { name: f.name, hint: f.hint, values: f.values }; });
},
valuesFor: function (path, key) {
if (path.length) return null;
var f = find(key); return f ? f.values : null;
},
describe: function (path, key) {
if (path.length) return null;
var f = find(key); return f ? f.hint : null;
}
};
}
// Schema: a JSON Schema (draft-2020-12 subset). Resolves nested key-paths
// through properties / additionalProperties / patternProperties and the
// recursive $ref:"#" .zddc uses for paths:. Keys = object property names;
// values = enum / boolean.
function schemaProvider(getSchema) {
function root() { return getSchema(); }
function deref(node) { return (node && node.$ref === '#') ? root() : node; }
function stepInto(node, seg) {
node = deref(node);
if (!node || node.type !== 'object') return null;
if (node.properties && node.properties[seg]) return node.properties[seg];
if (node.additionalProperties && typeof node.additionalProperties === 'object') {
return node.additionalProperties;
}
if (node.patternProperties) {
for (var p in node.patternProperties) {
if (Object.prototype.hasOwnProperty.call(node.patternProperties, p)) {
return node.patternProperties[p];
}
}
}
return null;
}
function containerAt(path) {
var node = deref(root());
for (var i = 0; i < path.length; i++) {
node = stepInto(node, path[i]);
if (!node) return null;
node = deref(node);
}
return node;
}
function valuesOf(node) {
node = deref(node);
if (!node) return null;
if (Array.isArray(node.enum)) return node.enum.map(String);
if (node.type === 'boolean') return ['true', 'false'];
return null;
}
function keyNodeAt(path, key) {
var c = containerAt(path);
if (!c || !c.properties) return null;
return c.properties[key] || null;
}
return {
keysAt: function (path) {
var c = containerAt(path);
if (!c || c.type !== 'object' || !c.properties) return [];
return Object.keys(c.properties).map(function (name) {
var n = deref(c.properties[name]) || {};
return { name: name, hint: n.description, values: valuesOf(n) };
});
},
valuesFor: function (path, key) { return valuesOf(keyNodeAt(path, key)); },
describe: function (path, key) {
var n = deref(keyNodeAt(path, key));
return n ? n.description : null;
}
};
}
window.app.modules.yamlComplete = {
attach: attach,
makeHinter: makeHinter,
flatProvider: flatProvider,
schemaProvider: schemaProvider
};
})();