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Commit 172ca7a

Browse files
authored
Merge pull request #64 from zubyj/auto-theme
Auto Theme Support: Match LeetCode’s Light/Dark Mode Automatically
2 parents 4e06b07 + 1f983d1 commit 172ca7a

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8 files changed

+311
-21
lines changed

8 files changed

+311
-21
lines changed

‎src/background/background.ts‎

Lines changed: 4 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -40,12 +40,14 @@ chrome.runtime.onInstalled.addListener(() => {
4040
});
4141

4242
// Load default settings
43-
chrome.storage.local.set({ fontSize: 14 });
43+
chrome.storage.local.set({ fontSize: 12 });// Default to small display size
4444
chrome.storage.local.set({ showExamples: true });
4545
chrome.storage.local.set({ showDifficulty: true });
4646
chrome.storage.local.set({ showRating: true });
4747
chrome.storage.local.set({ showCompanyTags: true });
48-
chrome.storage.local.set({ isDarkTheme: true });
48+
// Set default theme to auto mode and default to dark
49+
chrome.storage.local.set({ isDarkTheme: true }); // Default to dark theme
50+
chrome.storage.local.set({ themeMode: 'auto' });
4951
});
5052

5153
chrome.runtime.onMessage.addListener((request) => {

‎src/content-script/themeDetector.js‎

Lines changed: 54 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,54 @@
1+
// Listen for messages from the background script or popup
2+
chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
3+
if (request.action === 'detectTheme') {
4+
const theme = detectPageTheme();
5+
sendResponse({ theme });
6+
}
7+
return true; // Keep the message channel open for asynchronous response
8+
});
9+
10+
// Function to detect the theme of the current LeetCode page
11+
function detectPageTheme() {
12+
// Method 1: Check HTML tag class for 'dark' or 'light'
13+
const htmlElement = document.documentElement;
14+
if (htmlElement.classList.contains('dark')) {
15+
return 'dark';
16+
} else if (htmlElement.classList.contains('light')) {
17+
return 'light';
18+
}
19+
20+
// Method 2: Check data-theme attribute
21+
const dataTheme = htmlElement.getAttribute('data-theme');
22+
if (dataTheme === 'dark') {
23+
return 'dark';
24+
} else if (dataTheme === 'light') {
25+
return 'light';
26+
}
27+
28+
// Method 3: Check background color to determine if dark or light
29+
const backgroundColor = window.getComputedStyle(document.body).backgroundColor;
30+
if (isColorDark(backgroundColor)) {
31+
return 'dark';
32+
}
33+
34+
// Default to dark if we can't determine
35+
return 'dark';
36+
}
37+
38+
// Helper function to determine if a color is dark based on luminance
39+
function isColorDark(color) {
40+
// Extract RGB values
41+
const rgb = color.match(/\d+/g);
42+
if (!rgb || rgb.length < 3) return true; // Default to dark if can't extract
43+
44+
// Calculate relative luminance
45+
const r = parseInt(rgb[0]) / 255;
46+
const g = parseInt(rgb[1]) / 255;
47+
const b = parseInt(rgb[2]) / 255;
48+
49+
// Weighted luminance formula (human eye is more sensitive to green)
50+
const luminance = 0.2126 * r + 0.7152 * g + 0.0722 * b;
51+
52+
// Return true for dark colors (lower luminance)
53+
return luminance < 0.5;
54+
}

‎src/content-script/update-description-tab.ts‎

Lines changed: 66 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -20,6 +20,61 @@ interface Problem {
2020
// Add other properties as needed
2121
}
2222

23+
// Detect LeetCode's theme and set extension theme accordingly
24+
function detectAndSyncTheme() {
25+
chrome.storage.local.get(['themeMode'], (result) => {
26+
// Only sync theme if in auto mode
27+
if (result.themeMode !== 'auto') {
28+
return;
29+
}
30+
31+
// Get the current LeetCode theme from HTML tag
32+
const htmlElement = document.documentElement;
33+
const leetcodeTheme = htmlElement.classList.contains('dark') ? 'dark' : 'light';
34+
35+
// Set the extension theme based on LeetCode's theme
36+
chrome.storage.local.set({
37+
isDarkTheme: leetcodeTheme === 'dark'
38+
});
39+
40+
console.log(`Theme auto-detected: ${leetcodeTheme}`);
41+
42+
// Set up observer for future theme changes
43+
observeThemeChanges();
44+
});
45+
}
46+
47+
// Observe theme changes in LeetCode and update extension theme
48+
function observeThemeChanges() {
49+
chrome.storage.local.get(['themeMode'], (result) => {
50+
// Only observe changes if theme mode is set to 'auto'
51+
if (result.themeMode !== 'auto') {
52+
return;
53+
}
54+
55+
const htmlElement = document.documentElement;
56+
57+
// Create a new observer
58+
const observer = new MutationObserver((mutations) => {
59+
mutations.forEach((mutation) => {
60+
if (mutation.attributeName === 'class') {
61+
const leetcodeTheme = htmlElement.classList.contains('dark') ? 'dark' : 'light';
62+
chrome.storage.local.set({
63+
isDarkTheme: leetcodeTheme === 'dark'
64+
});
65+
console.log(`Theme changed to: ${leetcodeTheme}`);
66+
}
67+
});
68+
});
69+
70+
// Start observing
71+
observer.observe(htmlElement, {
72+
attributes: true,
73+
attributeFilter: ['class']
74+
});
75+
});
76+
}
77+
2378
// show the leetcode difficulty if the user has enabled it in the settings
2479
function showDifficulty() {
2580
chrome.storage.local.get(['showDifficulty'], (result) => {
@@ -191,11 +246,21 @@ function loadCompanyTags(problemTitle: string, companyTagContainer: HTMLElement)
191246
return companyTagContainer;
192247
}
193248

194-
chrome.runtime.onMessage.addListener((request) => {
249+
chrome.runtime.onMessage.addListener((request,sender,sendResponse) => {
195250
if (request.action === 'updateDescription') {
251+
// Detect theme on first load of a problem page
252+
detectAndSyncTheme();
196253
showExamples();
197254
showCompanyTags(request.title.split('-')[0].trim());
198255
showDifficulty();
199256
showRating(request.title.split('-')[0].trim());
257+
} else if (request.action === 'getTheme') {
258+
// Return the current LeetCode theme
259+
const htmlElement = document.documentElement;
260+
const leetcodeTheme = htmlElement.classList.contains('dark') ? 'dark' : 'light';
261+
sendResponse({ theme: leetcodeTheme });
200262
}
263+
264+
// Return true to indicate we will send a response asynchronously (needed for sendResponse)
265+
return true;
201266
});

‎src/popup/popup.css‎

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -330,6 +330,10 @@ pre[class*="language-"] {
330330
padding: calc(15px * var(--scale-factor)) 0;
331331
}
332332

333+
#theme-text {
334+
font-weight: 600;
335+
}
336+
333337
.video-container {
334338
display: none;
335339
border-radius: var(--border-radius);

‎src/popup/popup.ts‎

Lines changed: 27 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -250,14 +250,34 @@ async function main(): Promise<void> {
250250
initializeScaleFactor();
251251
await loadStoredData();
252252

253-
// get name of current tab and set info message
253+
// get name of current tab and set info message, also check theme if in auto mode
254254
chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
255255
const tab = tabs[0];
256256
if (tab.url && tab.url.includes('leetcode.com/problems')) {
257257
chrome.storage.local.set({ 'currentLeetCodeProblemTitle': tab.title });
258258
if (tab.title && infoMessage) {
259259
infoMessage.textContent = tab.title.split('-')[0];
260260
}
261+
262+
// Check if we're in auto mode and need to sync theme
263+
chrome.storage.local.get(['themeMode'], (result) => {
264+
if (result.themeMode === 'auto') {
265+
// Send a message to detect theme
266+
chrome.tabs.sendMessage(
267+
tab.id as number,
268+
{ action: 'getTheme' },
269+
(response) => {
270+
if (!chrome.runtime.lastError && response && response.theme) {
271+
// Apply detected theme
272+
document.documentElement.setAttribute('data-theme', response.theme);
273+
chrome.storage.local.set({
274+
isDarkTheme: response.theme === 'dark'
275+
});
276+
}
277+
}
278+
);
279+
}
280+
});
261281
}
262282
});
263283

@@ -283,8 +303,9 @@ function initializeScaleFactor(): void {
283303
chrome.storage.local.get('fontSize', function (data) {
284304
if (data.fontSize) {
285305
let scaleFactor: number;
306+
const fontSize = data.fontSize.toString();
286307

287-
switch (data.fontSize) {
308+
switch (fontSize) {
288309
case '12':
289310
scaleFactor = 0.9;
290311
break;
@@ -297,6 +318,10 @@ function initializeScaleFactor(): void {
297318
}
298319

299320
document.documentElement.style.setProperty('--scale-factor', scaleFactor.toString());
321+
} else {
322+
// Default to small if not set
323+
document.documentElement.style.setProperty('--scale-factor', '0.9');
324+
chrome.storage.local.set({ fontSize: 12 });
300325
}
301326
});
302327
}

‎src/popup/settings.html‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -20,7 +20,7 @@
2020
</select>
2121
<button id="enable-dark-theme-btn" class="material-button settings-btn">
2222
<span id="theme-icon"></span>
23-
<span id="theme-text">Dark mode</span>
23+
<span>Display</span><span id="theme-text">Dark</span>
2424
</button>
2525
<button id="show-company-tags-btn" class="material-button settings-btn">
2626
<span id="show-company-tags-icon"> </span> Show Company Tags

‎src/popup/settings.ts‎

Lines changed: 40 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -17,13 +17,45 @@ homeButton.onclick = () => {
1717
document.addEventListener('DOMContentLoaded', () => {
1818

1919
initializeTheme();
20+
21+
// Check active tab for theme if in auto mode
22+
chrome.storage.local.get(['themeMode'], (result) => {
23+
if (result.themeMode === 'auto') {
24+
chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
25+
if (tabs[0] && tabs[0].id && tabs[0].url && tabs[0].url.includes('leetcode.com/problems')) {
26+
chrome.tabs.sendMessage(
27+
tabs[0].id,
28+
{ action: 'getTheme' },
29+
(response) => {
30+
if (!chrome.runtime.lastError && response && response.theme) {
31+
// Apply detected theme
32+
document.documentElement.setAttribute('data-theme', response.theme);
33+
chrome.storage.local.set({
34+
isDarkTheme: response.theme === 'dark'
35+
});
36+
// Update UI
37+
const themeIcon = document.getElementById('theme-icon');
38+
const themeText = document.getElementById('theme-text');
39+
if (themeIcon && themeText) {
40+
themeIcon.textContent = '🔄';
41+
themeText.textContent = 'Auto';
42+
}
43+
}
44+
}
45+
);
46+
}
47+
});
48+
}
49+
});
50+
2051
document.getElementById('enable-dark-theme-btn')?.addEventListener('click', () => {
2152
toggleTheme();
2253
chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
2354
chrome.tabs.sendMessage(tabs[0].id || 0, { action: 'updateDescription', title: tabs[0].title || 'title' });
2455
chrome.tabs.sendMessage(tabs[0].id || 0, { action: 'updateSolutions', title: tabs[0].title || 'title' });
2556
});
2657
});
58+
2759
chrome.storage.local.get(['showCompanyTags'], (result) => {
2860
const showCompanyTagsIcon = document.getElementById('show-company-tags-icon');
2961
if (showCompanyTagsIcon) showCompanyTagsIcon.textContent = result.showCompanyTags ? '✅' : '❌';
@@ -45,14 +77,19 @@ document.addEventListener('DOMContentLoaded', () => {
4577
const fontSizeSelect = document.getElementById('font-size-select') as HTMLSelectElement;
4678
chrome.storage.local.get('fontSize', function (data) {
4779
if (data.fontSize) {
48-
fontSizeSelect.value = data.fontSize;
49-
updateScaleFactor(data.fontSize);
80+
fontSizeSelect.value = data.fontSize.toString();
81+
updateScaleFactor(data.fontSize.toString());
82+
} else {
83+
// Default to small if not set
84+
fontSizeSelect.value = '12';
85+
updateScaleFactor('12');
86+
chrome.storage.local.set({ fontSize: 12 });
5087
}
5188
});
5289

5390
fontSizeSelect.onchange = function (event: Event) {
5491
const selectedFontSize = (event.target as HTMLInputElement).value;
55-
chrome.storage.local.set({ fontSize: selectedFontSize });
92+
chrome.storage.local.set({ fontSize: parseInt(selectedFontSize) });
5693
updateScaleFactor(selectedFontSize);
5794
};
5895

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