Hugging Face's logo

Spaces:
Shinhati2023
/
Holded_Blog
Running

App Files Community
Holded_Blog
File size: 4,842 Bytes
138e8b6
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
/* ============================================================
   GLASSGRID — THEME ENGINE
   
   Handles theme loading, switching, token overrides,
   and version rollback. Zero UI modification.
   ============================================================ */

'use strict';

const STORAGE_KEY_THEME   = 'gg_active_theme';
const STORAGE_KEY_HISTORY = 'gg_theme_history';
const STORAGE_KEY_OVERRIDES = 'gg_token_overrides';

class ThemeEngine {

  constructor() {
    this.activeTheme   = 'midnight';
    this.themeHistory  = [];
    this.overrides     = {};
    this._styleEl      = null;
    this._overrideEl   = null;
  }

  /** Initialize theme engine — call on app start */
  async init() {
    this._injectOverrideStyleEl();
    this.themeHistory = this._loadHistory();
    this.overrides    = this._loadOverrides();

    const savedTheme  = localStorage.getItem(STORAGE_KEY_THEME) || 'midnight';
    await this.applyTheme(savedTheme, false);
    this._applyTokenOverrides(this.overrides);
  }

  /** Switch to a named theme */
  async applyTheme(themeId, pushHistory = true) {
    const themes = await this._loadThemeRegistry();
    const theme  = themes.find(t => t.id === themeId);
    if (!theme) { console.warn(`[ThemeEngine] Unknown theme: ${themeId}`); return; }

    document.documentElement.dataset.theme = themeId;
    this.activeTheme = themeId;
    localStorage.setItem(STORAGE_KEY_THEME, themeId);

    if (pushHistory) {
      this.themeHistory = [themeId, ...this.themeHistory.filter(t => t !== themeId)].slice(0, 10);
      this._saveHistory(this.themeHistory);
    }

    document.dispatchEvent(new CustomEvent('gg:theme:changed', { detail: { themeId } }));
  }

  /** Roll back to previous theme */
  rollback() {
    const [_current, previous, ...rest] = this.themeHistory;
    if (!previous) { console.warn('[ThemeEngine] No previous theme to roll back to.'); return; }
    this.themeHistory = [previous, _current, ...rest];
    this._saveHistory(this.themeHistory);
    this.applyTheme(previous, false);
    document.dispatchEvent(new CustomEvent('gg:theme:rollback', { detail: { themeId: previous } }));
  }

  /** Override a single CSS token */
  setToken(tokenName, value) {
    if (!tokenName.startsWith('--')) tokenName = `--${tokenName}`;
    this.overrides[tokenName] = value;
    this._applyTokenOverrides(this.overrides);
    this._saveOverrides(this.overrides);
  }

  /** Override multiple tokens at once */
  setTokens(tokenMap) {
    for (const [key, value] of Object.entries(tokenMap)) {
      const name = key.startsWith('--') ? key : `--${key}`;
      this.overrides[name] = value;
    }
    this._applyTokenOverrides(this.overrides);
    this._saveOverrides(this.overrides);
  }

  /** Remove a single token override (reverts to theme default) */
  removeToken(tokenName) {
    if (!tokenName.startsWith('--')) tokenName = `--${tokenName}`;
    delete this.overrides[tokenName];
    this._applyTokenOverrides(this.overrides);
    this._saveOverrides(this.overrides);
  }

  /** Reset all token overrides */
  resetTokens() {
    this.overrides = {};
    this._overrideEl.textContent = '';
    this._saveOverrides({});
  }

  /** Get all token overrides */
  getOverrides() {
    return { ...this.overrides };
  }

  /** Get theme history */
  getHistory() {
    return [...this.themeHistory];
  }

  // ── Private ──────────────────────────

  _injectOverrideStyleEl() {
    this._overrideEl = document.createElement('style');
    this._overrideEl.id = 'gg-token-overrides';
    document.head.appendChild(this._overrideEl);
  }

  _applyTokenOverrides(overrides) {
    if (!this._overrideEl) return;
    const rules = Object.entries(overrides)
      .map(([k, v]) => `  ${k}: ${v};`)
      .join('\n');
    this._overrideEl.textContent = rules.length ? `:root {\n${rules}\n}` : '';
  }

  async _loadThemeRegistry() {
    try {
      const res = await fetch('./data/themes.json');
      const data = await res.json();
      return data.themes || [];
    } catch {
      return [
        { id: 'midnight', name: 'Midnight' },
        { id: 'aurora',   name: 'Aurora' },
        { id: 'ember',    name: 'Ember' },
        { id: 'ocean',    name: 'Ocean' },
      ];
    }
  }

  _loadHistory() {
    try {
      return JSON.parse(localStorage.getItem(STORAGE_KEY_HISTORY) || '["midnight"]');
    } catch { return ['midnight']; }
  }

  _saveHistory(history) {
    localStorage.setItem(STORAGE_KEY_HISTORY, JSON.stringify(history));
  }

  _loadOverrides() {
    try {
      return JSON.parse(localStorage.getItem(STORAGE_KEY_OVERRIDES) || '{}');
    } catch { return {}; }
  }

  _saveOverrides(overrides) {
    localStorage.setItem(STORAGE_KEY_OVERRIDES, JSON.stringify(overrides));
  }
}

export const themeEngine = new ThemeEngine();