Add implementation plan for card layout feature
Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
682
docs/superpowers/plans/2026-08-26-card-layout.md
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682
docs/superpowers/plans/2026-08-26-card-layout.md
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# Card Layout Implementation Plan
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> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
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**Goal:** Wrap each old Reddit post in a shadcn-styled card with configurable gap, page background, and independent toggle from badges.
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**Architecture:** Add `rt-card` class to each `div.thing.link` via JS, apply card styling via scoped CSS. Convert internal float layout to flexbox. Shared dark mode detection in `settings.js`. Unified MutationObserver in `main.js` for both badge and card processing.
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**Tech Stack:** Vanilla JS (IIFE modules on `window.RedditTweaks`), plain CSS, Firefox WebExtension manifest v2.
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## Global Constraints
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- old.reddit.com only — `www.reddit.com` is out of scope
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- No build tools, no frameworks, no npm dependencies
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- All CSS values for the card must match shadcn/ui's default neutral theme exactly (see spec `docs/superpowers/specs/2026-08-26-card-layout-design.md` for token table)
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- Modules use IIFE pattern and expose API on `window.RedditTweaks`
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- Imports at top of file, no inline imports
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---
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### Task 1: Extract shared utilities to `settings.js`
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Move `isDarkMode()` and `getColorPrefix()` from `badges.js` into `settings.js` as shared infrastructure. Add new setting defaults. Update all consumers.
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**Files:**
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- Modify: `lib/settings.js`
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- Modify: `content/tweaks/badges.js`
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- Modify: `content/tweaks/color-popover.js`
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**Interfaces:**
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- Produces: `window.RedditTweaks.isDarkMode(settings)` → `boolean`
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- Produces: `window.RedditTweaks.getColorPrefix(settings)` → `"light" | "dark"`
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- Produces: New DEFAULTS keys: `badgeLayout` (true), `cardLayout` (true), `cardBackground` ("reddit"), `cardGap` (16)
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- [ ] **Step 1: Add dark mode functions and new defaults to `settings.js`**
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Add `isDarkMode`, `getColorPrefix`, and new setting keys to `lib/settings.js`. Insert after the `resetSettings` function, before the `window.RedditTweaks` assignment:
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```js
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function isDarkMode(settings) {
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if (settings.darkMode === "light") return false;
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if (settings.darkMode === "dark") return true;
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return document.body.classList.contains("res-nightmode");
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}
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function getColorPrefix(settings) {
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return isDarkMode(settings) ? "dark" : "light";
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}
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```
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Add to `DEFAULTS`:
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```js
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badgeLayout: true,
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cardLayout: true,
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cardBackground: "reddit",
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cardGap: 16,
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```
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Add to the `window.RedditTweaks` assignment:
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```js
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window.RedditTweaks.isDarkMode = isDarkMode;
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window.RedditTweaks.getColorPrefix = getColorPrefix;
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```
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- [ ] **Step 2: Update `badges.js` to use shared functions**
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In `content/tweaks/badges.js`:
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Remove the `isDarkMode` and `getColorPrefix` function definitions (lines 8-17).
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Replace all internal calls to `isDarkMode(settings)` with `window.RedditTweaks.isDarkMode(settings)` and `getColorPrefix(settings)` with `window.RedditTweaks.getColorPrefix(settings)`.
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Update the exported API — keep `isDarkMode` and `getColorPrefix` as aliases for backward compatibility during this transition, but point them at the shared versions:
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```js
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window.RedditTweaks.badgeTweak = {
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apply: apply,
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updateColors: updateColors,
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isDarkMode: window.RedditTweaks.isDarkMode,
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getColorPrefix: window.RedditTweaks.getColorPrefix,
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};
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```
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- [ ] **Step 3: Update `color-popover.js` to use shared functions**
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In `content/tweaks/color-popover.js`, change the `getHelpers()` function (lines 16-21):
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```js
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function getHelpers() {
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return {
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isDarkMode: window.RedditTweaks.isDarkMode,
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getColorPrefix: window.RedditTweaks.getColorPrefix,
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};
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}
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```
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- [ ] **Step 4: Verify extension still works**
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Load the extension in Firefox (`about:debugging` → Load Temporary Add-on). Navigate to `old.reddit.com`. Verify:
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- Badges render with correct colors
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- Dark mode detection works (if RES is installed, toggle night mode)
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- Color popover opens and displays correct mode
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- No console errors
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- [ ] **Step 5: Commit**
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```bash
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git add lib/settings.js content/tweaks/badges.js content/tweaks/color-popover.js
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git commit -m "refactor: extract isDarkMode/getColorPrefix to settings.js as shared utilities"
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```
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---
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### Task 2: Badge layout toggle + FOUC CSS rename
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Add `badgeLayout` toggle to the popup and gate badge processing behind it. Rename the FOUC CSS class from `rt-enabled` to `rt-badges-enabled`.
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**Files:**
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- Modify: `content/styles/badges.css`
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- Modify: `content/main.js`
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- Modify: `popup/popup.html`
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- Modify: `popup/popup.js`
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**Interfaces:**
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- Consumes: `settings.badgeLayout` (boolean, from Task 1 DEFAULTS)
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- Produces: `html.rt-badges-enabled` class on `<html>` (replaces `html.rt-enabled`)
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- [ ] **Step 1: Rename FOUC selectors in `badges.css`**
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In `content/styles/badges.css`, change the FOUC prevention selectors (lines 1-5):
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From:
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```css
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html.rt-enabled .thing.link .tagline .subreddit,
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html.rt-enabled .thing.link .flat-list li:has(> .comments) {
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display: none !important;
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}
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```
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To:
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```css
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html.rt-badges-enabled .thing.link .tagline .subreddit,
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html.rt-badges-enabled .thing.link .flat-list li:has(> .comments) {
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display: none !important;
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}
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```
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- [ ] **Step 2: Update `main.js` to gate badges behind `badgeLayout`**
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Replace the `init()` function in `content/main.js`:
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```js
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async function init() {
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const settings = await window.RedditTweaks.loadSettings();
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if (!settings.enabled) return;
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if (settings.badgeLayout) {
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document.documentElement.classList.add("rt-badges-enabled");
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window.RedditTweaks.badgeTweak.apply(settings);
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}
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browser.storage.onChanged.addListener(function (changes) {
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if (
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(changes.enabled && changes.enabled.newValue !== changes.enabled.oldValue) ||
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(changes.badgeLayout && changes.badgeLayout.newValue !== changes.badgeLayout.oldValue)
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) {
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location.reload();
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return;
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}
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window.RedditTweaks.loadSettings().then(function (updated) {
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if (settings.badgeLayout) {
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window.RedditTweaks.badgeTweak.updateColors(updated);
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}
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});
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});
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}
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```
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- [ ] **Step 3: Add badge toggle to popup HTML**
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In `popup/popup.html`, add a badge toggle after the existing enabled checkbox. Change the first section:
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```html
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<div class="section">
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<label class="toggle-row">
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<span>Enabled</span>
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<input type="checkbox" id="enabled">
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</label>
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<label class="toggle-row">
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<span>Badge layout</span>
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<input type="checkbox" id="badgeLayout">
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</label>
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</div>
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```
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- [ ] **Step 4: Wire badge toggle in `popup.js`**
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In `popup/popup.js`, add `badgeLayout` to the `populateControls` function:
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```js
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document.getElementById("badgeLayout").checked = settings.badgeLayout;
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```
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Add change listener in `init()`, next to the existing `enabled` listener:
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```js
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document.getElementById("badgeLayout").addEventListener("change", saveFromControls);
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```
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Add to `saveFromControls()` — in the settings object construction, add:
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```js
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badgeLayout: document.getElementById("badgeLayout").checked,
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```
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- [ ] **Step 5: Verify badge toggle works**
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Reload extension. Open popup:
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- Badge layout checkbox is checked by default
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- Unchecking it and reloading old.reddit.com: original subreddit/comment links are visible, no badges
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- Checking it back: badges return after reload
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- No console errors
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- [ ] **Step 6: Commit**
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```bash
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git add content/styles/badges.css content/main.js popup/popup.html popup/popup.js
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git commit -m "feat: add badgeLayout toggle, rename FOUC class to rt-badges-enabled"
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```
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---
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### Task 3: Create card CSS
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Create `content/styles/cards.css` with all card styling per the spec. Add it to the manifest.
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**Files:**
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- Create: `content/styles/cards.css`
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- Modify: `manifest.json`
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**Interfaces:**
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- Produces: CSS rules scoped under `.rt-card`, `html.rt-card-enabled`, `html.rt-card-bg-shadcn`
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- [ ] **Step 1: Create `content/styles/cards.css`**
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```css
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/* --- Post list container --- */
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html.rt-card-enabled #siteTable {
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display: flex;
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flex-direction: column;
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align-items: flex-start;
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gap: var(--rt-card-gap, 1rem);
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}
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html.rt-card-enabled #siteTable > .clearleft {
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display: none;
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}
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/* --- Card container --- */
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.rt-card {
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background: #ffffff;
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color: #0a0a0a;
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border: 1px solid #e5e5e5;
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border-radius: 0.875rem;
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padding: 1.5rem;
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box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
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transition: border-color 0.15s;
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display: flex;
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align-items: flex-start;
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gap: 0.75rem;
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width: 100%;
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overflow: hidden;
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}
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.rt-card:hover {
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border-color: #d4d4d4;
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}
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/* --- Card internal layout overrides --- */
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.rt-card .midcol,
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.rt-card .thumbnail {
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float: none;
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flex-shrink: 0;
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}
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.rt-card .entry {
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flex: 1;
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min-width: 0;
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}
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.rt-card .clearleft {
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display: none;
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}
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/* --- Card dark mode --- */
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.rt-dark .rt-card {
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background: #171717;
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color: #fafafa;
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border-color: rgba(255, 255, 255, 0.1);
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}
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.rt-dark .rt-card:hover {
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border-color: rgba(255, 255, 255, 0.18);
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}
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/* --- Page background override --- */
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html.rt-card-bg-shadcn .content[role="main"] {
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background: #f5f5f5;
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}
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html.rt-card-bg-shadcn.rt-dark .content[role="main"] {
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background: #262626;
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}
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```
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- [ ] **Step 2: Add `cards.css` to `manifest.json`**
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In the `content_scripts[0].css` array, add `content/styles/cards.css` after `badges.css`:
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```json
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"css": ["content/styles/badges.css", "content/styles/cards.css"],
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```
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- [ ] **Step 3: Verify no parse errors**
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Reload extension. Open `old.reddit.com`. No console CSS parse errors. Cards don't render yet (no JS adding the `rt-card` class), but the CSS is loaded.
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- [ ] **Step 4: Commit**
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```bash
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git add content/styles/cards.css manifest.json
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git commit -m "feat: add card CSS with shadcn design tokens"
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```
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---
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### Task 4: Create card JS + unified observer
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Create the card tweak module. Refactor `main.js` to use a single shared MutationObserver that dispatches to both badge and card processors. Remove the duplicate observer from `badges.js`.
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**Files:**
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- Create: `content/tweaks/cards.js`
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- Modify: `content/tweaks/badges.js`
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- Modify: `content/main.js`
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- Modify: `manifest.json`
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**Interfaces:**
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- Consumes: `window.RedditTweaks.isDarkMode(settings)` (from Task 1)
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- Consumes: `settings.cardLayout`, `settings.cardBackground`, `settings.cardGap` (from Task 1)
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- Produces: `window.RedditTweaks.cardTweak.apply(settings)` — processes posts + applies card classes
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- Produces: `window.RedditTweaks.cardTweak.updateSettings(settings)` — live-update gap/background
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- Produces: `window.RedditTweaks.cardTweak.processNewPosts(settings)` — process unprocessed posts (called by shared observer)
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- Modifies: `window.RedditTweaks.badgeTweak` — adds `processNewPosts(settings)` for shared observer, removes internal observer
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- [ ] **Step 1: Create `content/tweaks/cards.js`**
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```js
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(function () {
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"use strict";
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function processPost(post) {
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if (post.classList.contains("rt-card")) return;
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post.classList.add("rt-card");
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}
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function processPosts() {
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var posts = document.querySelectorAll("div.thing.link:not(.rt-card)");
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for (var i = 0; i < posts.length; i++) {
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processPost(posts[i]);
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}
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}
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function applyDarkMode(settings) {
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if (window.RedditTweaks.isDarkMode(settings)) {
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document.documentElement.classList.add("rt-dark");
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} else {
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document.documentElement.classList.remove("rt-dark");
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}
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}
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function applyBackground(settings) {
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if (settings.cardBackground === "shadcn") {
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document.documentElement.classList.add("rt-card-bg-shadcn");
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} else {
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document.documentElement.classList.remove("rt-card-bg-shadcn");
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}
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}
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function applyGap(settings) {
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var siteTable = document.getElementById("siteTable");
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if (siteTable) {
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siteTable.style.setProperty("--rt-card-gap", settings.cardGap + "px");
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}
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}
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function apply(settings) {
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document.documentElement.classList.add("rt-card-enabled");
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applyDarkMode(settings);
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applyBackground(settings);
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applyGap(settings);
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processPosts();
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}
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function updateSettings(settings) {
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applyDarkMode(settings);
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applyBackground(settings);
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applyGap(settings);
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}
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window.RedditTweaks = window.RedditTweaks || {};
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window.RedditTweaks.cardTweak = {
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apply: apply,
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updateSettings: updateSettings,
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processNewPosts: processPosts,
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};
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})();
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```
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- [ ] **Step 2: Expose `processNewPosts` from `badges.js`, remove both internal observers**
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In `content/tweaks/badges.js`:
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Remove the `contentObserver` variable declaration (line 4: `let contentObserver = null;`).
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Remove the `darkModeObserver` variable declaration (line 5: `let darkModeObserver = null;`).
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Remove the `getObserverTarget()` function (lines 106-112).
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Remove the `startContentObserver(settings)` function (lines 114-135).
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Remove the `startDarkModeObserver()` function (lines 137-149).
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Remove both observer calls from the `apply()` function: `startContentObserver(settings)` (line 168) and `startDarkModeObserver()` (line 169).
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Add `processNewPosts` to the exported API:
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|
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```js
|
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window.RedditTweaks.badgeTweak = {
|
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apply: apply,
|
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updateColors: updateColors,
|
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isDarkMode: window.RedditTweaks.isDarkMode,
|
||||
getColorPrefix: window.RedditTweaks.getColorPrefix,
|
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processNewPosts: processPosts,
|
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};
|
||||
```
|
||||
|
||||
- [ ] **Step 3: Add unified observer to `main.js`**
|
||||
|
||||
In `content/main.js`, add shared observer functions before `init()`.
|
||||
|
||||
First, the dark mode observer (moved from `badges.js`). This watches for RES night mode toggles and dispatches to both modules:
|
||||
|
||||
```js
|
||||
function startDarkModeObserver(settings) {
|
||||
var observer = new MutationObserver(function () {
|
||||
if (settings.darkMode === "auto") {
|
||||
window.RedditTweaks.loadSettings().then(function (updated) {
|
||||
if (settings.badgeLayout) {
|
||||
window.RedditTweaks.badgeTweak.updateColors(updated);
|
||||
}
|
||||
if (settings.cardLayout) {
|
||||
window.RedditTweaks.cardTweak.updateSettings(updated);
|
||||
}
|
||||
});
|
||||
}
|
||||
});
|
||||
|
||||
observer.observe(document.body, {
|
||||
attributes: true,
|
||||
attributeFilter: ["class"],
|
||||
});
|
||||
}
|
||||
```
|
||||
|
||||
Then the content observer for new posts:
|
||||
|
||||
```js
|
||||
function startPostObserver(settings) {
|
||||
var target =
|
||||
document.getElementById("siteTable") ||
|
||||
document.querySelector('.content[role="main"]') ||
|
||||
document.body;
|
||||
|
||||
var observer = new MutationObserver(function (mutations) {
|
||||
var hasNewPosts = false;
|
||||
for (var i = 0; i < mutations.length; i++) {
|
||||
var added = mutations[i].addedNodes;
|
||||
for (var j = 0; j < added.length; j++) {
|
||||
var node = added[j];
|
||||
if (node.nodeType !== Node.ELEMENT_NODE) continue;
|
||||
if ((node.matches && node.matches("div.thing.link")) ||
|
||||
(node.querySelector && node.querySelector("div.thing.link"))) {
|
||||
hasNewPosts = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (hasNewPosts) break;
|
||||
}
|
||||
if (hasNewPosts) {
|
||||
window.RedditTweaks.loadSettings().then(function (updated) {
|
||||
if (settings.badgeLayout) {
|
||||
window.RedditTweaks.badgeTweak.processNewPosts(updated);
|
||||
}
|
||||
if (settings.cardLayout) {
|
||||
window.RedditTweaks.cardTweak.processNewPosts(updated);
|
||||
}
|
||||
});
|
||||
}
|
||||
});
|
||||
|
||||
observer.observe(target, { childList: true, subtree: true });
|
||||
}
|
||||
```
|
||||
|
||||
Update `init()` to call `cardTweak.apply`, start the shared observer, and observe dark mode changes for cards:
|
||||
|
||||
```js
|
||||
async function init() {
|
||||
const settings = await window.RedditTweaks.loadSettings();
|
||||
if (!settings.enabled) return;
|
||||
|
||||
if (settings.badgeLayout) {
|
||||
document.documentElement.classList.add("rt-badges-enabled");
|
||||
window.RedditTweaks.badgeTweak.apply(settings);
|
||||
}
|
||||
|
||||
if (settings.cardLayout) {
|
||||
window.RedditTweaks.cardTweak.apply(settings);
|
||||
}
|
||||
|
||||
if (settings.badgeLayout || settings.cardLayout) {
|
||||
startPostObserver(settings);
|
||||
startDarkModeObserver(settings);
|
||||
}
|
||||
|
||||
browser.storage.onChanged.addListener(function (changes) {
|
||||
if (
|
||||
(changes.enabled && changes.enabled.newValue !== changes.enabled.oldValue) ||
|
||||
(changes.badgeLayout && changes.badgeLayout.newValue !== changes.badgeLayout.oldValue) ||
|
||||
(changes.cardLayout && changes.cardLayout.newValue !== changes.cardLayout.oldValue)
|
||||
) {
|
||||
location.reload();
|
||||
return;
|
||||
}
|
||||
|
||||
window.RedditTweaks.loadSettings().then(function (updated) {
|
||||
if (settings.badgeLayout) {
|
||||
window.RedditTweaks.badgeTweak.updateColors(updated);
|
||||
}
|
||||
if (settings.cardLayout) {
|
||||
window.RedditTweaks.cardTweak.updateSettings(updated);
|
||||
}
|
||||
});
|
||||
});
|
||||
}
|
||||
```
|
||||
|
||||
- [ ] **Step 4: Add `cards.js` to `manifest.json`**
|
||||
|
||||
In the `content_scripts[0].js` array, add `content/tweaks/cards.js` before `main.js`:
|
||||
|
||||
```json
|
||||
"js": [
|
||||
"lib/settings.js",
|
||||
"content/tweaks/badges.js",
|
||||
"content/tweaks/color-picker.js",
|
||||
"content/tweaks/color-popover.js",
|
||||
"content/tweaks/cards.js",
|
||||
"content/main.js"
|
||||
],
|
||||
```
|
||||
|
||||
Also remove `"*://www.reddit.com/*"` from the `matches` array (out of scope per spec):
|
||||
|
||||
```json
|
||||
"matches": ["*://old.reddit.com/*"],
|
||||
```
|
||||
|
||||
- [ ] **Step 5: Verify cards render**
|
||||
|
||||
Reload extension. Navigate to `old.reddit.com`:
|
||||
- Each post is wrapped in a card: white background, 1px `#e5e5e5` border, 14px rounded corners, subtle shadow
|
||||
- Posts are separated by 16px gaps
|
||||
- Vote arrows, thumbnail, and entry are horizontally aligned (no floats)
|
||||
- Hovering a card darkens the border to `#d4d4d4`
|
||||
- Badges still render inside cards (if badge layout is enabled)
|
||||
- No console errors
|
||||
|
||||
- [ ] **Step 6: Commit**
|
||||
|
||||
```bash
|
||||
git add content/tweaks/cards.js content/tweaks/badges.js content/main.js manifest.json
|
||||
git commit -m "feat: add card layout tweak with unified post observer"
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
### Task 5: Popup controls for card settings
|
||||
|
||||
Add card layout controls to the extension popup: enable toggle, background style dropdown, card spacing dropdown.
|
||||
|
||||
**Files:**
|
||||
- Modify: `popup/popup.html`
|
||||
- Modify: `popup/popup.js`
|
||||
|
||||
**Interfaces:**
|
||||
- Consumes: `settings.cardLayout`, `settings.cardBackground`, `settings.cardGap` (from Task 1 DEFAULTS)
|
||||
|
||||
- [ ] **Step 1: Add card layout section to popup HTML**
|
||||
|
||||
In `popup/popup.html`, add this section after the Dark Mode section and before the Light Mode Colors section:
|
||||
|
||||
```html
|
||||
<div class="section">
|
||||
<h2>Card Layout</h2>
|
||||
<label class="toggle-row">
|
||||
<span>Enable card layout</span>
|
||||
<input type="checkbox" id="cardLayout">
|
||||
</label>
|
||||
<label for="cardBackground">Background Style</label>
|
||||
<select id="cardBackground">
|
||||
<option value="reddit">Reddit Default</option>
|
||||
<option value="shadcn">shadcn Style</option>
|
||||
</select>
|
||||
<label for="cardGap">Card Spacing</label>
|
||||
<select id="cardGap">
|
||||
<option value="8">8px</option>
|
||||
<option value="12">12px</option>
|
||||
<option value="16">16px</option>
|
||||
<option value="24">24px</option>
|
||||
<option value="32">32px</option>
|
||||
</select>
|
||||
</div>
|
||||
```
|
||||
|
||||
- [ ] **Step 2: Wire card controls in `popup.js`**
|
||||
|
||||
In `populateControls(settings)`, add:
|
||||
|
||||
```js
|
||||
document.getElementById("cardLayout").checked = settings.cardLayout;
|
||||
document.getElementById("cardBackground").value = settings.cardBackground;
|
||||
document.getElementById("cardGap").value = String(settings.cardGap);
|
||||
```
|
||||
|
||||
In `saveFromControls()`, add to the settings object:
|
||||
|
||||
```js
|
||||
cardLayout: document.getElementById("cardLayout").checked,
|
||||
cardBackground: document.getElementById("cardBackground").value,
|
||||
cardGap: parseInt(document.getElementById("cardGap").value, 10),
|
||||
```
|
||||
|
||||
In `init()`, add change listeners:
|
||||
|
||||
```js
|
||||
document.getElementById("cardLayout").addEventListener("change", saveFromControls);
|
||||
document.getElementById("cardBackground").addEventListener("change", saveFromControls);
|
||||
document.getElementById("cardGap").addEventListener("change", saveFromControls);
|
||||
```
|
||||
|
||||
- [ ] **Step 3: Verify settings work end-to-end**
|
||||
|
||||
Reload extension. Open popup:
|
||||
- Card layout checkbox is checked by default
|
||||
- Background dropdown shows "Reddit Default"
|
||||
- Card spacing shows "16px"
|
||||
- Changing card spacing to "24px": cards on old.reddit.com update gap live (no reload)
|
||||
- Changing background to "shadcn Style": page background becomes `#f5f5f5` (live)
|
||||
- Unchecking card layout: page reloads, cards disappear, posts show flat list
|
||||
- Settings persist after closing and reopening popup
|
||||
- Settings persist after browser restart
|
||||
|
||||
- [ ] **Step 4: Commit**
|
||||
|
||||
```bash
|
||||
git add popup/popup.html popup/popup.js
|
||||
git commit -m "feat: add card layout controls to extension popup"
|
||||
```
|
||||
Reference in New Issue
Block a user